File: linux_syscall_support.h

package info (click to toggle)
iceweasel 38.8.0esr-1~deb7u1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 1,578,008 kB
  • sloc: cpp: 4,134,345; ansic: 1,765,754; python: 324,651; java: 233,700; asm: 138,937; xml: 98,298; sh: 82,895; makefile: 21,621; perl: 17,235; objc: 4,014; yacc: 1,968; lex: 1,179; exp: 499; pascal: 479; lisp: 228; awk: 152; ruby: 82; sed: 43; csh: 31; ada: 16; php: 1
file content (3538 lines) | stat: -rw-r--r-- 147,809 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
/* Copyright (c) 2005-2011, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ---
 * Author: Markus Gutschke
 */

/* This file includes Linux-specific support functions common to the
 * coredumper and the thread lister; primarily, this is a collection
 * of direct system calls, and a couple of symbols missing from
 * standard header files.
 * There are a few options that the including file can set to control
 * the behavior of this file:
 *
 * SYS_CPLUSPLUS:
 *   The entire header file will normally be wrapped in 'extern "C" { }",
 *   making it suitable for compilation as both C and C++ source. If you
 *   do not want to do this, you can set the SYS_CPLUSPLUS macro to inhibit
 *   the wrapping. N.B. doing so will suppress inclusion of all prerequisite
 *   system header files, too. It is the caller's responsibility to provide
 *   the necessary definitions.
 *
 * SYS_ERRNO:
 *   All system calls will update "errno" unless overriden by setting the
 *   SYS_ERRNO macro prior to including this file. SYS_ERRNO should be
 *   an l-value.
 *
 * SYS_INLINE:
 *   New symbols will be defined "static inline", unless overridden by
 *   the SYS_INLINE macro.
 *
 * SYS_LINUX_SYSCALL_SUPPORT_H
 *   This macro is used to avoid multiple inclusions of this header file.
 *   If you need to include this file more than once, make sure to
 *   unset SYS_LINUX_SYSCALL_SUPPORT_H before each inclusion.
 *
 * SYS_PREFIX:
 *   New system calls will have a prefix of "sys_" unless overridden by
 *   the SYS_PREFIX macro. Valid values for this macro are [0..9] which
 *   results in prefixes "sys[0..9]_". It is also possible to set this
 *   macro to -1, which avoids all prefixes.
 *
 * SYS_SYSCALL_ENTRYPOINT:
 *   Some applications (such as sandboxes that filter system calls), need
 *   to be able to run custom-code each time a system call is made. If this
 *   macro is defined, it expands to the name of a "common" symbol. If
 *   this symbol is assigned a non-NULL pointer value, it is used as the
 *   address of the system call entrypoint.
 *   A pointer to this symbol can be obtained by calling
 *   get_syscall_entrypoint()
 *
 * This file defines a few internal symbols that all start with "LSS_".
 * Do not access these symbols from outside this file. They are not part
 * of the supported API.
 */
#ifndef SYS_LINUX_SYSCALL_SUPPORT_H
#define SYS_LINUX_SYSCALL_SUPPORT_H

/* We currently only support x86-32, x86-64, ARM, MIPS, and PPC on Linux.
 * Porting to other related platforms should not be difficult.
 */
#if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) ||   \
     defined(__mips__) || defined(__PPC__) || defined(__ARM_EABI__)) \
  && (defined(__linux) || defined(__ANDROID__))

#ifndef SYS_CPLUSPLUS
#ifdef __cplusplus
/* Some system header files in older versions of gcc neglect to properly
 * handle being included from C++. As it appears to be harmless to have
 * multiple nested 'extern "C"' blocks, just add another one here.
 */
extern "C" {
#endif

#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <linux/unistd.h>
#include <endian.h>

#ifdef __mips__
/* Include definitions of the ABI currently in use.                          */
#include <sgidefs.h>
#endif
#endif

/* The Android NDK's <sys/stat.h> #defines these macros as aliases
 * to their non-64 counterparts. To avoid naming conflict, remove them. */
#ifdef __ANDROID__
  /* These are restored by the corresponding #pragma pop_macro near
   * the end of this file. */
# pragma push_macro("stat64")
# pragma push_macro("fstat64")
# pragma push_macro("lstat64")
# undef stat64
# undef fstat64
# undef lstat64
#endif

/* As glibc often provides subtly incompatible data structures (and implicit
 * wrapper functions that convert them), we provide our own kernel data
 * structures for use by the system calls.
 * These structures have been developed by using Linux 2.6.23 headers for
 * reference. Note though, we do not care about exact API compatibility
 * with the kernel, and in fact the kernel often does not have a single
 * API that works across architectures. Instead, we try to mimic the glibc
 * API where reasonable, and only guarantee ABI compatibility with the
 * kernel headers.
 * Most notably, here are a few changes that were made to the structures
 * defined by kernel headers:
 *
 * - we only define structures, but not symbolic names for kernel data
 *   types. For the latter, we directly use the native C datatype
 *   (i.e. "unsigned" instead of "mode_t").
 * - in a few cases, it is possible to define identical structures for
 *   both 32bit (e.g. i386) and 64bit (e.g. x86-64) platforms by
 *   standardizing on the 64bit version of the data types. In particular,
 *   this means that we use "unsigned" where the 32bit headers say
 *   "unsigned long".
 * - overall, we try to minimize the number of cases where we need to
 *   conditionally define different structures.
 * - the "struct kernel_sigaction" class of structures have been
 *   modified to more closely mimic glibc's API by introducing an
 *   anonymous union for the function pointer.
 * - a small number of field names had to have an underscore appended to
 *   them, because glibc defines a global macro by the same name.
 */

/* include/linux/dirent.h                                                    */
struct kernel_dirent64 {
  unsigned long long d_ino;
  long long          d_off;
  unsigned short     d_reclen;
  unsigned char      d_type;
  char               d_name[256];
};

/* include/linux/dirent.h                                                    */
struct kernel_dirent {
  long               d_ino;
  long               d_off;
  unsigned short     d_reclen;
  char               d_name[256];
};

/* include/linux/uio.h                                                       */
struct kernel_iovec {
  void               *iov_base;
  unsigned long      iov_len;
};

/* include/linux/socket.h                                                    */
struct kernel_msghdr {
  void               *msg_name;
  int                msg_namelen;
  struct kernel_iovec*msg_iov;
  unsigned long      msg_iovlen;
  void               *msg_control;
  unsigned long      msg_controllen;
  unsigned           msg_flags;
};

/* include/asm-generic/poll.h                                                */
struct kernel_pollfd {
  int                fd;
  short              events;
  short              revents;
};

/* include/linux/resource.h                                                  */
struct kernel_rlimit {
  unsigned long      rlim_cur;
  unsigned long      rlim_max;
};

/* include/linux/time.h                                                      */
struct kernel_timespec {
  long               tv_sec;
  long               tv_nsec;
};

/* include/linux/time.h                                                      */
struct kernel_timeval {
  long               tv_sec;
  long               tv_usec;
};

/* include/linux/resource.h                                                  */
struct kernel_rusage {
  struct kernel_timeval ru_utime;
  struct kernel_timeval ru_stime;
  long               ru_maxrss;
  long               ru_ixrss;
  long               ru_idrss;
  long               ru_isrss;
  long               ru_minflt;
  long               ru_majflt;
  long               ru_nswap;
  long               ru_inblock;
  long               ru_oublock;
  long               ru_msgsnd;
  long               ru_msgrcv;
  long               ru_nsignals;
  long               ru_nvcsw;
  long               ru_nivcsw;
};

struct siginfo;
#if defined(__i386__) || defined(__ARM_EABI__) || defined(__ARM_ARCH_3__) \
  || defined(__PPC__)

/* include/asm-{arm,i386,mips,ppc}/signal.h                                  */
struct kernel_old_sigaction {
  union {
    void             (*sa_handler_)(int);
    void             (*sa_sigaction_)(int, struct siginfo *, void *);
  };
  unsigned long      sa_mask;
  unsigned long      sa_flags;
  void               (*sa_restorer)(void);
} __attribute__((packed,aligned(4)));
#elif (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32)
  #define kernel_old_sigaction kernel_sigaction
#endif

/* Some kernel functions (e.g. sigaction() in 2.6.23) require that the
 * exactly match the size of the signal set, even though the API was
 * intended to be extensible. We define our own KERNEL_NSIG to deal with
 * this.
 * Please note that glibc provides signals [1.._NSIG-1], whereas the
 * kernel (and this header) provides the range [1..KERNEL_NSIG]. The
 * actual number of signals is obviously the same, but the constants
 * differ by one.
 */
#ifdef __mips__
#define KERNEL_NSIG 128
#else
#define KERNEL_NSIG  64
#endif

/* include/asm-{arm,i386,mips,x86_64}/signal.h                               */
struct kernel_sigset_t {
  unsigned long sig[(KERNEL_NSIG + 8*sizeof(unsigned long) - 1)/
                    (8*sizeof(unsigned long))];
};

/* include/asm-{arm,i386,mips,x86_64,ppc}/signal.h                           */
struct kernel_sigaction {
#ifdef __mips__
  unsigned long      sa_flags;
  union {
    void             (*sa_handler_)(int);
    void             (*sa_sigaction_)(int, struct siginfo *, void *);
  };
  struct kernel_sigset_t sa_mask;
#else
  union {
    void             (*sa_handler_)(int);
    void             (*sa_sigaction_)(int, struct siginfo *, void *);
  };
  unsigned long      sa_flags;
  void               (*sa_restorer)(void);
  struct kernel_sigset_t sa_mask;
#endif
};

/* include/linux/socket.h                                                    */
struct kernel_sockaddr {
  unsigned short     sa_family;
  char               sa_data[14];
};

/* include/asm-{arm,i386,mips,ppc}/stat.h                                    */
#ifdef __mips__
#if _MIPS_SIM == _MIPS_SIM_ABI64
struct kernel_stat {
#else
struct kernel_stat64 {
#endif
  unsigned           st_dev;
  unsigned           __pad0[3];
  unsigned long long st_ino;
  unsigned           st_mode;
  unsigned           st_nlink;
  unsigned           st_uid;
  unsigned           st_gid;
  unsigned           st_rdev;
  unsigned           __pad1[3];
  long long          st_size;
  unsigned           st_atime_;
  unsigned           st_atime_nsec_;
  unsigned           st_mtime_;
  unsigned           st_mtime_nsec_;
  unsigned           st_ctime_;
  unsigned           st_ctime_nsec_;
  unsigned           st_blksize;
  unsigned           __pad2;
  unsigned long long st_blocks;
};
#elif defined __PPC__
struct kernel_stat64 {
  unsigned long long st_dev;
  unsigned long long st_ino;
  unsigned           st_mode;
  unsigned           st_nlink;
  unsigned           st_uid;
  unsigned           st_gid;
  unsigned long long st_rdev;
  unsigned short int __pad2;
  long long          st_size;
  long               st_blksize;
  long long          st_blocks;
  long               st_atime_;
  unsigned long      st_atime_nsec_;
  long               st_mtime_;
  unsigned long      st_mtime_nsec_;
  long               st_ctime_;
  unsigned long      st_ctime_nsec_;
  unsigned long      __unused4;
  unsigned long      __unused5;
};
#else
struct kernel_stat64 {
  unsigned long long st_dev;
  unsigned char      __pad0[4];
  unsigned           __st_ino;
  unsigned           st_mode;
  unsigned           st_nlink;
  unsigned           st_uid;
  unsigned           st_gid;
  unsigned long long st_rdev;
  unsigned char      __pad3[4];
  long long          st_size;
  unsigned           st_blksize;
  unsigned long long st_blocks;
  unsigned           st_atime_;
  unsigned           st_atime_nsec_;
  unsigned           st_mtime_;
  unsigned           st_mtime_nsec_;
  unsigned           st_ctime_;
  unsigned           st_ctime_nsec_;
  unsigned long long st_ino;
};
#endif

/* include/asm-{arm,i386,mips,x86_64,ppc}/stat.h                             */
#if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__)
struct kernel_stat {
  /* The kernel headers suggest that st_dev and st_rdev should be 32bit
   * quantities encoding 12bit major and 20bit minor numbers in an interleaved
   * format. In reality, we do not see useful data in the top bits. So,
   * we'll leave the padding in here, until we find a better solution.
   */
  unsigned short     st_dev;
  short              pad1;
  unsigned           st_ino;
  unsigned short     st_mode;
  unsigned short     st_nlink;
  unsigned short     st_uid;
  unsigned short     st_gid;
  unsigned short     st_rdev;
  short              pad2;
  unsigned           st_size;
  unsigned           st_blksize;
  unsigned           st_blocks;
  unsigned           st_atime_;
  unsigned           st_atime_nsec_;
  unsigned           st_mtime_;
  unsigned           st_mtime_nsec_;
  unsigned           st_ctime_;
  unsigned           st_ctime_nsec_;
  unsigned           __unused4;
  unsigned           __unused5;
};
#elif defined(__x86_64__)
struct kernel_stat {
  unsigned long      st_dev;
  unsigned long      st_ino;
  unsigned long      st_nlink;
  unsigned           st_mode;
  unsigned           st_uid;
  unsigned           st_gid;
  unsigned           __pad0;
  unsigned long      st_rdev;
  long               st_size;
  long               st_blksize;
  long               st_blocks;
  unsigned long      st_atime_;
  unsigned long      st_atime_nsec_;
  unsigned long      st_mtime_;
  unsigned long      st_mtime_nsec_;
  unsigned long      st_ctime_;
  unsigned long      st_ctime_nsec_;
  long               __unused[3];
};
#elif defined(__PPC__)
struct kernel_stat {
  unsigned           st_dev;
  unsigned long      st_ino;      // ino_t
  unsigned long      st_mode;     // mode_t
  unsigned short     st_nlink;    // nlink_t
  unsigned           st_uid;      // uid_t
  unsigned           st_gid;      // gid_t
  unsigned           st_rdev;
  long               st_size;     // off_t
  unsigned long      st_blksize;
  unsigned long      st_blocks;
  unsigned long      st_atime_;
  unsigned long      st_atime_nsec_;
  unsigned long      st_mtime_;
  unsigned long      st_mtime_nsec_;
  unsigned long      st_ctime_;
  unsigned long      st_ctime_nsec_;
  unsigned long      __unused4;
  unsigned long      __unused5;
};
#elif (defined(__mips__) && _MIPS_SIM != _MIPS_SIM_ABI64)
struct kernel_stat {
  unsigned           st_dev;
  int                st_pad1[3];
  unsigned           st_ino;
  unsigned           st_mode;
  unsigned           st_nlink;
  unsigned           st_uid;
  unsigned           st_gid;
  unsigned           st_rdev;
  int                st_pad2[2];
  long               st_size;
  int                st_pad3;
  long               st_atime_;
  long               st_atime_nsec_;
  long               st_mtime_;
  long               st_mtime_nsec_;
  long               st_ctime_;
  long               st_ctime_nsec_;
  int                st_blksize;
  int                st_blocks;
  int                st_pad4[14];
};
#endif

/* include/asm-{arm,i386,mips,x86_64,ppc}/statfs.h                           */
#ifdef __mips__
#if _MIPS_SIM != _MIPS_SIM_ABI64
struct kernel_statfs64 {
  unsigned long      f_type;
  unsigned long      f_bsize;
  unsigned long      f_frsize;
  unsigned long      __pad;
  unsigned long long f_blocks;
  unsigned long long f_bfree;
  unsigned long long f_files;
  unsigned long long f_ffree;
  unsigned long long f_bavail;
  struct { int val[2]; } f_fsid;
  unsigned long      f_namelen;
  unsigned long      f_spare[6];
};
#endif
#elif !defined(__x86_64__)
struct kernel_statfs64 {
  unsigned long      f_type;
  unsigned long      f_bsize;
  unsigned long long f_blocks;
  unsigned long long f_bfree;
  unsigned long long f_bavail;
  unsigned long long f_files;
  unsigned long long f_ffree;
  struct { int val[2]; } f_fsid;
  unsigned long      f_namelen;
  unsigned long      f_frsize;
  unsigned long      f_spare[5];
};
#endif

/* include/asm-{arm,i386,mips,x86_64,ppc,generic}/statfs.h                   */
#ifdef __mips__
struct kernel_statfs {
  long               f_type;
  long               f_bsize;
  long               f_frsize;
  long               f_blocks;
  long               f_bfree;
  long               f_files;
  long               f_ffree;
  long               f_bavail;
  struct { int val[2]; } f_fsid;
  long               f_namelen;
  long               f_spare[6];
};
#else
struct kernel_statfs {
  /* x86_64 actually defines all these fields as signed, whereas all other  */
  /* platforms define them as unsigned. Leaving them at unsigned should not */
  /* cause any problems.                                                    */
  unsigned long      f_type;
  unsigned long      f_bsize;
  unsigned long      f_blocks;
  unsigned long      f_bfree;
  unsigned long      f_bavail;
  unsigned long      f_files;
  unsigned long      f_ffree;
  struct { int val[2]; } f_fsid;
  unsigned long      f_namelen;
  unsigned long      f_frsize;
  unsigned long      f_spare[5];
};
#endif


/* Definitions missing from the standard header files                        */
#ifndef O_DIRECTORY
#if defined(__ARM_ARCH_3__) || defined(__ARM_EABI__)
#define O_DIRECTORY             0040000
#else
#define O_DIRECTORY             0200000
#endif
#endif
#ifndef NT_PRXFPREG
#define NT_PRXFPREG             0x46e62b7f
#endif
#ifndef PTRACE_GETFPXREGS
#define PTRACE_GETFPXREGS       ((enum __ptrace_request)18)
#endif
#ifndef PR_GET_DUMPABLE
#define PR_GET_DUMPABLE         3
#endif
#ifndef PR_SET_DUMPABLE
#define PR_SET_DUMPABLE         4
#endif
#ifndef PR_GET_SECCOMP
#define PR_GET_SECCOMP          21
#endif
#ifndef PR_SET_SECCOMP
#define PR_SET_SECCOMP          22
#endif
#ifndef AT_FDCWD
#define AT_FDCWD                (-100)
#endif
#ifndef AT_SYMLINK_NOFOLLOW
#define AT_SYMLINK_NOFOLLOW     0x100
#endif
#ifndef AT_REMOVEDIR
#define AT_REMOVEDIR            0x200
#endif
#ifndef MREMAP_FIXED
#define MREMAP_FIXED            2
#endif
#ifndef SA_RESTORER
#define SA_RESTORER             0x04000000
#endif
#ifndef CPUCLOCK_PROF
#define CPUCLOCK_PROF           0
#endif
#ifndef CPUCLOCK_VIRT
#define CPUCLOCK_VIRT           1
#endif
#ifndef CPUCLOCK_SCHED
#define CPUCLOCK_SCHED          2
#endif
#ifndef CPUCLOCK_PERTHREAD_MASK
#define CPUCLOCK_PERTHREAD_MASK 4
#endif
#ifndef MAKE_PROCESS_CPUCLOCK
#define MAKE_PROCESS_CPUCLOCK(pid, clock)                                     \
        ((~(int)(pid) << 3) | (int)(clock))
#endif
#ifndef MAKE_THREAD_CPUCLOCK
#define MAKE_THREAD_CPUCLOCK(tid, clock)                                      \
        ((~(int)(tid) << 3) | (int)((clock) | CPUCLOCK_PERTHREAD_MASK))
#endif

#ifndef FUTEX_WAIT
#define FUTEX_WAIT                0
#endif
#ifndef FUTEX_WAKE
#define FUTEX_WAKE                1
#endif
#ifndef FUTEX_FD
#define FUTEX_FD                  2
#endif
#ifndef FUTEX_REQUEUE
#define FUTEX_REQUEUE             3
#endif
#ifndef FUTEX_CMP_REQUEUE
#define FUTEX_CMP_REQUEUE         4
#endif
#ifndef FUTEX_WAKE_OP
#define FUTEX_WAKE_OP             5
#endif
#ifndef FUTEX_LOCK_PI
#define FUTEX_LOCK_PI             6
#endif
#ifndef FUTEX_UNLOCK_PI
#define FUTEX_UNLOCK_PI           7
#endif
#ifndef FUTEX_TRYLOCK_PI
#define FUTEX_TRYLOCK_PI          8
#endif
#ifndef FUTEX_PRIVATE_FLAG
#define FUTEX_PRIVATE_FLAG        128
#endif
#ifndef FUTEX_CMD_MASK
#define FUTEX_CMD_MASK            ~FUTEX_PRIVATE_FLAG
#endif
#ifndef FUTEX_WAIT_PRIVATE
#define FUTEX_WAIT_PRIVATE        (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_WAKE_PRIVATE
#define FUTEX_WAKE_PRIVATE        (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_REQUEUE_PRIVATE
#define FUTEX_REQUEUE_PRIVATE     (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_CMP_REQUEUE_PRIVATE
#define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_WAKE_OP_PRIVATE
#define FUTEX_WAKE_OP_PRIVATE     (FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_LOCK_PI_PRIVATE
#define FUTEX_LOCK_PI_PRIVATE     (FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_UNLOCK_PI_PRIVATE
#define FUTEX_UNLOCK_PI_PRIVATE   (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
#endif
#ifndef FUTEX_TRYLOCK_PI_PRIVATE
#define FUTEX_TRYLOCK_PI_PRIVATE  (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
#endif


#if defined(__x86_64__)
#ifndef ARCH_SET_GS
#define ARCH_SET_GS             0x1001
#endif
#ifndef ARCH_GET_GS
#define ARCH_GET_GS             0x1004
#endif
#endif

#if defined(__i386__)
#ifndef __NR_quotactl
#define __NR_quotactl           131
#endif
#ifndef __NR_setresuid
#define __NR_setresuid          164
#define __NR_getresuid          165
#define __NR_setresgid          170
#define __NR_getresgid          171
#endif
#ifndef __NR_rt_sigaction
#define __NR_rt_sigreturn       173
#define __NR_rt_sigaction       174
#define __NR_rt_sigprocmask     175
#define __NR_rt_sigpending      176
#define __NR_rt_sigsuspend      179
#endif
#ifndef __NR_pread64
#define __NR_pread64            180
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64           181
#endif
#ifndef __NR_ugetrlimit
#define __NR_ugetrlimit         191
#endif
#ifndef __NR_stat64
#define __NR_stat64             195
#endif
#ifndef __NR_fstat64
#define __NR_fstat64            197
#endif
#ifndef __NR_setresuid32
#define __NR_setresuid32        208
#define __NR_getresuid32        209
#define __NR_setresgid32        210
#define __NR_getresgid32        211
#endif
#ifndef __NR_setfsuid32
#define __NR_setfsuid32         215
#define __NR_setfsgid32         216
#endif
#ifndef __NR_getdents64
#define __NR_getdents64         220
#endif
#ifndef __NR_gettid
#define __NR_gettid             224
#endif
#ifndef __NR_readahead
#define __NR_readahead          225
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           226
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          227
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           229
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          230
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          232
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         233
#endif
#ifndef __NR_tkill
#define __NR_tkill              238
#endif
#ifndef __NR_futex
#define __NR_futex              240
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  241
#define __NR_sched_getaffinity  242
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    258
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      265
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       266
#endif
#ifndef __NR_statfs64
#define __NR_statfs64           268
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64          269
#endif
#ifndef __NR_fadvise64_64
#define __NR_fadvise64_64       272
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         289
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         290
#endif
#ifndef __NR_openat
#define __NR_openat             295
#endif
#ifndef __NR_fstatat64
#define __NR_fstatat64          300
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           301
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         317
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             318
#endif
#ifndef __NR_fallocate
#define __NR_fallocate          324
#endif
/* End of i386 definitions                                                   */
#elif defined(__ARM_ARCH_3__) || defined(__ARM_EABI__)
#ifndef __NR_setresuid
#define __NR_setresuid          (__NR_SYSCALL_BASE + 164)
#define __NR_getresuid          (__NR_SYSCALL_BASE + 165)
#define __NR_setresgid          (__NR_SYSCALL_BASE + 170)
#define __NR_getresgid          (__NR_SYSCALL_BASE + 171)
#endif
#ifndef __NR_rt_sigaction
#define __NR_rt_sigreturn       (__NR_SYSCALL_BASE + 173)
#define __NR_rt_sigaction       (__NR_SYSCALL_BASE + 174)
#define __NR_rt_sigprocmask     (__NR_SYSCALL_BASE + 175)
#define __NR_rt_sigpending      (__NR_SYSCALL_BASE + 176)
#define __NR_rt_sigsuspend      (__NR_SYSCALL_BASE + 179)
#endif
#ifndef __NR_pread64
#define __NR_pread64            (__NR_SYSCALL_BASE + 180)
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64           (__NR_SYSCALL_BASE + 181)
#endif
#ifndef __NR_ugetrlimit
#define __NR_ugetrlimit         (__NR_SYSCALL_BASE + 191)
#endif
#ifndef __NR_stat64
#define __NR_stat64             (__NR_SYSCALL_BASE + 195)
#endif
#ifndef __NR_fstat64
#define __NR_fstat64            (__NR_SYSCALL_BASE + 197)
#endif
#ifndef __NR_setresuid32
#define __NR_setresuid32        (__NR_SYSCALL_BASE + 208)
#define __NR_getresuid32        (__NR_SYSCALL_BASE + 209)
#define __NR_setresgid32        (__NR_SYSCALL_BASE + 210)
#define __NR_getresgid32        (__NR_SYSCALL_BASE + 211)
#endif
#ifndef __NR_setfsuid32
#define __NR_setfsuid32         (__NR_SYSCALL_BASE + 215)
#define __NR_setfsgid32         (__NR_SYSCALL_BASE + 216)
#endif
#ifndef __NR_getdents64
#define __NR_getdents64         (__NR_SYSCALL_BASE + 217)
#endif
#ifndef __NR_gettid
#define __NR_gettid             (__NR_SYSCALL_BASE + 224)
#endif
#ifndef __NR_readahead
#define __NR_readahead          (__NR_SYSCALL_BASE + 225)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           (__NR_SYSCALL_BASE + 226)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          (__NR_SYSCALL_BASE + 227)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           (__NR_SYSCALL_BASE + 229)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          (__NR_SYSCALL_BASE + 230)
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          (__NR_SYSCALL_BASE + 232)
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         (__NR_SYSCALL_BASE + 233)
#endif
#ifndef __NR_tkill
#define __NR_tkill              (__NR_SYSCALL_BASE + 238)
#endif
#ifndef __NR_futex
#define __NR_futex              (__NR_SYSCALL_BASE + 240)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  (__NR_SYSCALL_BASE + 241)
#define __NR_sched_getaffinity  (__NR_SYSCALL_BASE + 242)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    (__NR_SYSCALL_BASE + 256)
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      (__NR_SYSCALL_BASE + 263)
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       (__NR_SYSCALL_BASE + 264)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64           (__NR_SYSCALL_BASE + 266)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64          (__NR_SYSCALL_BASE + 267)
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         (__NR_SYSCALL_BASE + 314)
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         (__NR_SYSCALL_BASE + 315)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         (__NR_SYSCALL_BASE + 344)
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             (__NR_SYSCALL_BASE + 345)
#endif
/* End of ARM 3/EABI definitions                                                */
#elif defined(__x86_64__)
#ifndef __NR_pread64
#define __NR_pread64             17
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64            18
#endif
#ifndef __NR_setresuid
#define __NR_setresuid          117
#define __NR_getresuid          118
#define __NR_setresgid          119
#define __NR_getresgid          120
#endif
#ifndef __NR_quotactl
#define __NR_quotactl           179
#endif
#ifndef __NR_gettid
#define __NR_gettid             186
#endif
#ifndef __NR_readahead
#define __NR_readahead          187
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           188
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          189
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           191
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          192
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          194
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         195
#endif
#ifndef __NR_tkill
#define __NR_tkill              200
#endif
#ifndef __NR_futex
#define __NR_futex              202
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  203
#define __NR_sched_getaffinity  204
#endif
#ifndef __NR_getdents64
#define __NR_getdents64         217
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    218
#endif
#ifndef __NR_fadvise64
#define __NR_fadvise64          221
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      228
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       229
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         251
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         252
#endif
#ifndef __NR_openat
#define __NR_openat             257
#endif
#ifndef __NR_newfstatat
#define __NR_newfstatat         262
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           263
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         279
#endif
#ifndef __NR_fallocate
#define __NR_fallocate          285
#endif
/* End of x86-64 definitions                                                 */
#elif defined(__mips__)
#if _MIPS_SIM == _MIPS_SIM_ABI32
#ifndef __NR_setresuid
#define __NR_setresuid          (__NR_Linux + 185)
#define __NR_getresuid          (__NR_Linux + 186)
#define __NR_setresgid          (__NR_Linux + 190)
#define __NR_getresgid          (__NR_Linux + 191)
#endif
#ifndef __NR_rt_sigaction
#define __NR_rt_sigreturn       (__NR_Linux + 193)
#define __NR_rt_sigaction       (__NR_Linux + 194)
#define __NR_rt_sigprocmask     (__NR_Linux + 195)
#define __NR_rt_sigpending      (__NR_Linux + 196)
#define __NR_rt_sigsuspend      (__NR_Linux + 199)
#endif
#ifndef __NR_pread64
#define __NR_pread64            (__NR_Linux + 200)
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64           (__NR_Linux + 201)
#endif
#ifndef __NR_stat64
#define __NR_stat64             (__NR_Linux + 213)
#endif
#ifndef __NR_fstat64
#define __NR_fstat64            (__NR_Linux + 215)
#endif
#ifndef __NR_getdents64
#define __NR_getdents64         (__NR_Linux + 219)
#endif
#ifndef __NR_gettid
#define __NR_gettid             (__NR_Linux + 222)
#endif
#ifndef __NR_readahead
#define __NR_readahead          (__NR_Linux + 223)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           (__NR_Linux + 224)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          (__NR_Linux + 225)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           (__NR_Linux + 227)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          (__NR_Linux + 228)
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          (__NR_Linux + 230)
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         (__NR_Linux + 231)
#endif
#ifndef __NR_tkill
#define __NR_tkill              (__NR_Linux + 236)
#endif
#ifndef __NR_futex
#define __NR_futex              (__NR_Linux + 238)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  (__NR_Linux + 239)
#define __NR_sched_getaffinity  (__NR_Linux + 240)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    (__NR_Linux + 252)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64           (__NR_Linux + 255)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64          (__NR_Linux + 256)
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      (__NR_Linux + 263)
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       (__NR_Linux + 264)
#endif
#ifndef __NR_openat
#define __NR_openat             (__NR_Linux + 288)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat            (__NR_Linux + 293)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           (__NR_Linux + 294)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         (__NR_Linux + 308)
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             (__NR_Linux + 312)
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         (__NR_Linux + 314)
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         (__NR_Linux + 315)
#endif
/* End of MIPS (old 32bit API) definitions */
#elif  _MIPS_SIM == _MIPS_SIM_ABI64
#ifndef __NR_pread64
#define __NR_pread64            (__NR_Linux +  16)
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64           (__NR_Linux +  17)
#endif
#ifndef __NR_setresuid
#define __NR_setresuid          (__NR_Linux + 115)
#define __NR_getresuid          (__NR_Linux + 116)
#define __NR_setresgid          (__NR_Linux + 117)
#define __NR_getresgid          (__NR_Linux + 118)
#endif
#ifndef __NR_gettid
#define __NR_gettid             (__NR_Linux + 178)
#endif
#ifndef __NR_readahead
#define __NR_readahead          (__NR_Linux + 179)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           (__NR_Linux + 180)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          (__NR_Linux + 181)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           (__NR_Linux + 183)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          (__NR_Linux + 184)
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          (__NR_Linux + 186)
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         (__NR_Linux + 187)
#endif
#ifndef __NR_tkill
#define __NR_tkill              (__NR_Linux + 192)
#endif
#ifndef __NR_futex
#define __NR_futex              (__NR_Linux + 194)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  (__NR_Linux + 195)
#define __NR_sched_getaffinity  (__NR_Linux + 196)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    (__NR_Linux + 212)
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      (__NR_Linux + 222)
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       (__NR_Linux + 223)
#endif
#ifndef __NR_openat
#define __NR_openat             (__NR_Linux + 247)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat            (__NR_Linux + 252)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           (__NR_Linux + 253)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         (__NR_Linux + 267)
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             (__NR_Linux + 271)
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         (__NR_Linux + 273)
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         (__NR_Linux + 274)
#endif
/* End of MIPS (64bit API) definitions */
#else
#ifndef __NR_setresuid
#define __NR_setresuid          (__NR_Linux + 115)
#define __NR_getresuid          (__NR_Linux + 116)
#define __NR_setresgid          (__NR_Linux + 117)
#define __NR_getresgid          (__NR_Linux + 118)
#endif
#ifndef __NR_gettid
#define __NR_gettid             (__NR_Linux + 178)
#endif
#ifndef __NR_readahead
#define __NR_readahead          (__NR_Linux + 179)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           (__NR_Linux + 180)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          (__NR_Linux + 181)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           (__NR_Linux + 183)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          (__NR_Linux + 184)
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          (__NR_Linux + 186)
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         (__NR_Linux + 187)
#endif
#ifndef __NR_tkill
#define __NR_tkill              (__NR_Linux + 192)
#endif
#ifndef __NR_futex
#define __NR_futex              (__NR_Linux + 194)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  (__NR_Linux + 195)
#define __NR_sched_getaffinity  (__NR_Linux + 196)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    (__NR_Linux + 213)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64           (__NR_Linux + 217)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64          (__NR_Linux + 218)
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      (__NR_Linux + 226)
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       (__NR_Linux + 227)
#endif
#ifndef __NR_openat
#define __NR_openat             (__NR_Linux + 251)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat            (__NR_Linux + 256)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           (__NR_Linux + 257)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         (__NR_Linux + 271)
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             (__NR_Linux + 275)
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         (__NR_Linux + 277)
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         (__NR_Linux + 278)
#endif
/* End of MIPS (new 32bit API) definitions                                   */
#endif
/* End of MIPS definitions                                                   */
#elif defined(__PPC__)
#ifndef __NR_setfsuid
#define __NR_setfsuid           138
#define __NR_setfsgid           139
#endif
#ifndef __NR_setresuid
#define __NR_setresuid          164
#define __NR_getresuid          165
#define __NR_setresgid          169
#define __NR_getresgid          170
#endif
#ifndef __NR_rt_sigaction
#define __NR_rt_sigreturn       172
#define __NR_rt_sigaction       173
#define __NR_rt_sigprocmask     174
#define __NR_rt_sigpending      175
#define __NR_rt_sigsuspend      178
#endif
#ifndef __NR_pread64
#define __NR_pread64            179
#endif
#ifndef __NR_pwrite64
#define __NR_pwrite64           180
#endif
#ifndef __NR_ugetrlimit
#define __NR_ugetrlimit         190
#endif
#ifndef __NR_readahead
#define __NR_readahead          191
#endif
#ifndef __NR_stat64
#define __NR_stat64             195
#endif
#ifndef __NR_fstat64
#define __NR_fstat64            197
#endif
#ifndef __NR_getdents64
#define __NR_getdents64         202
#endif
#ifndef __NR_gettid
#define __NR_gettid             207
#endif
#ifndef __NR_tkill
#define __NR_tkill              208
#endif
#ifndef __NR_setxattr
#define __NR_setxattr           209
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr          210
#endif
#ifndef __NR_getxattr
#define __NR_getxattr           212
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr          213
#endif
#ifndef __NR_listxattr
#define __NR_listxattr          215
#endif
#ifndef __NR_llistxattr
#define __NR_llistxattr         216
#endif
#ifndef __NR_futex
#define __NR_futex              221
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity  222
#define __NR_sched_getaffinity  223
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address    232
#endif
#ifndef __NR_clock_gettime
#define __NR_clock_gettime      246
#endif
#ifndef __NR_clock_getres
#define __NR_clock_getres       247
#endif
#ifndef __NR_statfs64
#define __NR_statfs64           252
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64          253
#endif
#ifndef __NR_fadvise64_64
#define __NR_fadvise64_64       254
#endif
#ifndef __NR_ioprio_set
#define __NR_ioprio_set         273
#endif
#ifndef __NR_ioprio_get
#define __NR_ioprio_get         274
#endif
#ifndef __NR_openat
#define __NR_openat             286
#endif
#ifndef __NR_fstatat64
#define __NR_fstatat64          291
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat           292
#endif
#ifndef __NR_move_pages
#define __NR_move_pages         301
#endif
#ifndef __NR_getcpu
#define __NR_getcpu             302
#endif
/* End of powerpc defininitions                                              */
#endif


/* After forking, we must make sure to only call system calls.               */
#if defined(__BOUNDED_POINTERS__)
  #error "Need to port invocations of syscalls for bounded ptrs"
#else
  /* The core dumper and the thread lister get executed after threads
   * have been suspended. As a consequence, we cannot call any functions
   * that acquire locks. Unfortunately, libc wraps most system calls
   * (e.g. in order to implement pthread_atfork, and to make calls
   * cancellable), which means we cannot call these functions. Instead,
   * we have to call syscall() directly.
   */
  #undef LSS_ERRNO
  #ifdef SYS_ERRNO
    /* Allow the including file to override the location of errno. This can
     * be useful when using clone() with the CLONE_VM option.
     */
    #define LSS_ERRNO SYS_ERRNO
  #else
    #define LSS_ERRNO errno
  #endif

  #undef LSS_INLINE
  #ifdef SYS_INLINE
    #define LSS_INLINE SYS_INLINE
  #else
    #define LSS_INLINE static inline
  #endif

  /* Allow the including file to override the prefix used for all new
   * system calls. By default, it will be set to "sys_".
   */
  #undef LSS_NAME
  #ifndef SYS_PREFIX
    #define LSS_NAME(name) sys_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX < 0
    #define LSS_NAME(name) name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 0
    #define LSS_NAME(name) sys0_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 1
    #define LSS_NAME(name) sys1_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 2
    #define LSS_NAME(name) sys2_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 3
    #define LSS_NAME(name) sys3_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 4
    #define LSS_NAME(name) sys4_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 5
    #define LSS_NAME(name) sys5_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 6
    #define LSS_NAME(name) sys6_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 7
    #define LSS_NAME(name) sys7_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 8
    #define LSS_NAME(name) sys8_##name
  #elif defined(SYS_PREFIX) && SYS_PREFIX == 9
    #define LSS_NAME(name) sys9_##name
  #endif

  #undef  LSS_RETURN
  #if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) \
       || defined(__ARM_EABI__))
  /* Failing system calls return a negative result in the range of
   * -1..-4095. These are "errno" values with the sign inverted.
   */
  #define LSS_RETURN(type, res)                                               \
    do {                                                                      \
      if ((unsigned long)(res) >= (unsigned long)(-4095)) {                   \
        LSS_ERRNO = -(res);                                                   \
        res = -1;                                                             \
      }                                                                       \
      return (type) (res);                                                    \
    } while (0)
  #elif defined(__mips__)
  /* On MIPS, failing system calls return -1, and set errno in a
   * separate CPU register.
   */
  #define LSS_RETURN(type, res, err)                                          \
    do {                                                                      \
      if (err) {                                                              \
        unsigned long __errnovalue = (res);                                   \
        LSS_ERRNO = __errnovalue;                                             \
        res = -1;                                                             \
      }                                                                       \
      return (type) (res);                                                    \
    } while (0)
  #elif defined(__PPC__)
  /* On PPC, failing system calls return -1, and set errno in a
   * separate CPU register. See linux/unistd.h.
   */
  #define LSS_RETURN(type, res, err)                                          \
   do {                                                                       \
     if (err & 0x10000000 ) {                                                 \
       LSS_ERRNO = (res);                                                     \
       res = -1;                                                              \
     }                                                                        \
     return (type) (res);                                                     \
   } while (0)
  #endif
  #if defined(__i386__)
    /* In PIC mode (e.g. when building shared libraries), gcc for i386
     * reserves ebx. Unfortunately, most distribution ship with implementations
     * of _syscallX() which clobber ebx.
     * Also, most definitions of _syscallX() neglect to mark "memory" as being
     * clobbered. This causes problems with compilers, that do a better job
     * at optimizing across __asm__ calls.
     * So, we just have to redefine all of the _syscallX() macros.
     */
    #undef LSS_ENTRYPOINT
    #ifdef SYS_SYSCALL_ENTRYPOINT
    static inline void (**LSS_NAME(get_syscall_entrypoint)(void))(void) {
      void (**entrypoint)(void);
      asm volatile(".bss\n"
                   ".align 8\n"
                   ".globl " SYS_SYSCALL_ENTRYPOINT "\n"
                   ".common " SYS_SYSCALL_ENTRYPOINT ",8,8\n"
                   ".previous\n"
                   /* This logically does 'lea "SYS_SYSCALL_ENTRYPOINT", %0' */
                   "call 0f\n"
                 "0:pop  %0\n"
                   "add  $_GLOBAL_OFFSET_TABLE_+[.-0b], %0\n"
                   "mov  " SYS_SYSCALL_ENTRYPOINT "@GOT(%0), %0\n"
                   : "=r"(entrypoint));
      return entrypoint;
    }

    #define LSS_ENTRYPOINT ".bss\n"                                           \
                           ".align 8\n"                                       \
                           ".globl " SYS_SYSCALL_ENTRYPOINT "\n"              \
                           ".common " SYS_SYSCALL_ENTRYPOINT ",8,8\n"         \
                           ".previous\n"                                      \
                           /* Check the SYS_SYSCALL_ENTRYPOINT vector      */ \
                           "push %%eax\n"                                     \
                           "call 10000f\n"                                    \
                     "10000:pop  %%eax\n"                                     \
                           "add  $_GLOBAL_OFFSET_TABLE_+[.-10000b], %%eax\n"  \
                           "mov  " SYS_SYSCALL_ENTRYPOINT                     \
                                 "@GOT(%%eax), %%eax\n"                       \
                           "mov  0(%%eax), %%eax\n"                           \
                           "test %%eax, %%eax\n"                              \
                           "jz   10002f\n"                                    \
                           "push %%eax\n"                                     \
                           "call 10001f\n"                                    \
                     "10001:pop  %%eax\n"                                     \
                           "add  $(10003f-10001b), %%eax\n"                   \
                           "xchg 4(%%esp), %%eax\n"                           \
                           "ret\n"                                            \
                     "10002:pop  %%eax\n"                                     \
                           "int $0x80\n"                                      \
                     "10003:\n"
    #else
    #define LSS_ENTRYPOINT "int $0x80\n"
    #endif
    #undef  LSS_BODY
    #define LSS_BODY(type,args...)                                            \
      long __res;                                                             \
      __asm__ __volatile__("push %%ebx\n"                                     \
                           "movl %2,%%ebx\n"                                  \
                           LSS_ENTRYPOINT                                     \
                           "pop %%ebx"                                        \
                           args                                               \
                           : "esp", "memory");                                \
      LSS_RETURN(type,__res)
    #undef  _syscall0
    #define _syscall0(type,name)                                              \
      type LSS_NAME(name)(void) {                                             \
        long __res;                                                           \
        __asm__ volatile(LSS_ENTRYPOINT                                       \
                         : "=a" (__res)                                       \
                         : "0" (__NR_##name)                                  \
                         : "esp", "memory");                                  \
        LSS_RETURN(type,__res);                                               \
      }
    #undef  _syscall1
    #define _syscall1(type,name,type1,arg1)                                   \
      type LSS_NAME(name)(type1 arg1) {                                       \
        LSS_BODY(type,                                                        \
             : "=a" (__res)                                                   \
             : "0" (__NR_##name), "ri" ((long)(arg1)));                       \
      }
    #undef  _syscall2
    #define _syscall2(type,name,type1,arg1,type2,arg2)                        \
      type LSS_NAME(name)(type1 arg1,type2 arg2) {                            \
        LSS_BODY(type,                                                        \
             : "=a" (__res)                                                   \
             : "0" (__NR_##name),"ri" ((long)(arg1)), "c" ((long)(arg2)));    \
      }
    #undef  _syscall3
    #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)             \
      type LSS_NAME(name)(type1 arg1,type2 arg2,type3 arg3) {                 \
        LSS_BODY(type,                                                        \
             : "=a" (__res)                                                   \
             : "0" (__NR_##name), "ri" ((long)(arg1)), "c" ((long)(arg2)),    \
               "d" ((long)(arg3)));                                           \
      }
    #undef  _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
        LSS_BODY(type,                                                        \
             : "=a" (__res)                                                   \
             : "0" (__NR_##name), "ri" ((long)(arg1)), "c" ((long)(arg2)),    \
               "d" ((long)(arg3)),"S" ((long)(arg4)));                        \
      }
    #undef  _syscall5
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        long __res;                                                           \
        __asm__ __volatile__("push %%ebx\n"                                   \
                             "movl %2,%%ebx\n"                                \
                             "movl %1,%%eax\n"                                \
                             LSS_ENTRYPOINT                                   \
                             "pop  %%ebx"                                     \
                             : "=a" (__res)                                   \
                             : "i" (__NR_##name), "ri" ((long)(arg1)),        \
                               "c" ((long)(arg2)), "d" ((long)(arg3)),        \
                               "S" ((long)(arg4)), "D" ((long)(arg5))         \
                             : "esp", "memory");                              \
        LSS_RETURN(type,__res);                                               \
      }
    #undef  _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
        long __res;                                                           \
        struct { long __a1; long __a6; } __s = { (long)arg1, (long) arg6 };   \
        __asm__ __volatile__("push %%ebp\n"                                   \
                             "push %%ebx\n"                                   \
                             "movl 4(%2),%%ebp\n"                             \
                             "movl 0(%2), %%ebx\n"                            \
                             "movl %1,%%eax\n"                                \
                             LSS_ENTRYPOINT                                   \
                             "pop  %%ebx\n"                                   \
                             "pop  %%ebp"                                     \
                             : "=a" (__res)                                   \
                             : "i" (__NR_##name),  "0" ((long)(&__s)),        \
                               "c" ((long)(arg2)), "d" ((long)(arg3)),        \
                               "S" ((long)(arg4)), "D" ((long)(arg5))         \
                             : "esp", "memory");                              \
        LSS_RETURN(type,__res);                                               \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      __asm__ __volatile__(/* if (fn == NULL)
                            *   return -EINVAL;
                            */
                           "movl   %3,%%ecx\n"
                           "jecxz  1f\n"

                           /* if (child_stack == NULL)
                            *   return -EINVAL;
                            */
                           "movl   %4,%%ecx\n"
                           "jecxz  1f\n"

                           /* Set up alignment of the child stack:
                            * child_stack = (child_stack & ~0xF) - 20;
                            */
                           "andl   $-16,%%ecx\n"
                           "subl   $20,%%ecx\n"

                           /* Push "arg" and "fn" onto the stack that will be
                            * used by the child.
                            */
                           "movl   %6,%%eax\n"
                           "movl   %%eax,4(%%ecx)\n"
                           "movl   %3,%%eax\n"
                           "movl   %%eax,(%%ecx)\n"

                           /* %eax = syscall(%eax = __NR_clone,
                            *                %ebx = flags,
                            *                %ecx = child_stack,
                            *                %edx = parent_tidptr,
                            *                %esi = newtls,
                            *                %edi = child_tidptr)
                            * Also, make sure that %ebx gets preserved as it is
                            * used in PIC mode.
                            */
                           "movl   %8,%%esi\n"
                           "movl   %7,%%edx\n"
                           "movl   %5,%%eax\n"
                           "movl   %9,%%edi\n"
                           "pushl  %%ebx\n"
                           "movl   %%eax,%%ebx\n"
                           "movl   %2,%%eax\n"
                           LSS_ENTRYPOINT

                           /* In the parent: restore %ebx
                            * In the child:  move "fn" into %ebx
                            */
                           "popl   %%ebx\n"

                           /* if (%eax != 0)
                            *   return %eax;
                            */
                           "test   %%eax,%%eax\n"
                           "jnz    1f\n"

                           /* In the child, now. Terminate frame pointer chain.
                            */
                           "movl   $0,%%ebp\n"

                           /* Call "fn". "arg" is already on the stack.
                            */
                           "call   *%%ebx\n"

                           /* Call _exit(%ebx). Unfortunately older versions
                            * of gcc restrict the number of arguments that can
                            * be passed to asm(). So, we need to hard-code the
                            * system call number.
                            */
                           "movl   %%eax,%%ebx\n"
                           "movl   $1,%%eax\n"
                           LSS_ENTRYPOINT

                           /* Return to parent.
                            */
                         "1:\n"
                           : "=a" (__res)
                           : "0"(-EINVAL), "i"(__NR_clone),
                             "m"(fn), "m"(child_stack), "m"(flags), "m"(arg),
                             "m"(parent_tidptr), "m"(newtls), "m"(child_tidptr)
                           : "esp", "memory", "ecx", "edx", "esi", "edi");
      LSS_RETURN(int, __res);
    }

    #define __NR__fadvise64_64 __NR_fadvise64_64
    LSS_INLINE _syscall6(int, _fadvise64_64, int, fd,
                         unsigned, offset_lo, unsigned, offset_hi,
                         unsigned, len_lo, unsigned, len_hi,
                         int, advice)

    LSS_INLINE int LSS_NAME(fadvise64)(int fd, loff_t offset,
                                       loff_t len, int advice) {
      return LSS_NAME(_fadvise64_64)(fd,
                                     (unsigned)offset, (unsigned)(offset >>32),
                                     (unsigned)len, (unsigned)(len >> 32),
                                     advice);
    }

    #define __NR__fallocate __NR_fallocate
    LSS_INLINE _syscall6(int, _fallocate, int, fd,
                         int, mode,
                         unsigned, offset_lo, unsigned, offset_hi,
                         unsigned, len_lo, unsigned, len_hi)

    LSS_INLINE int LSS_NAME(fallocate)(int fd, int mode,
                                       loff_t offset, loff_t len) {
      union { loff_t off; unsigned w[2]; } o = { offset }, l = { len };
      return LSS_NAME(_fallocate)(fd, mode, o.w[0], o.w[1], l.w[0], l.w[1]);
    }

    LSS_INLINE _syscall1(int, set_thread_area, void *, u)
    LSS_INLINE _syscall1(int, get_thread_area, void *, u)

    LSS_INLINE void (*LSS_NAME(restore_rt)(void))(void) {
      /* On i386, the kernel does not know how to return from a signal
       * handler. Instead, it relies on user space to provide a
       * restorer function that calls the {rt_,}sigreturn() system call.
       * Unfortunately, we cannot just reference the glibc version of this
       * function, as glibc goes out of its way to make it inaccessible.
       */
      void (*res)(void);
      __asm__ __volatile__("call   2f\n"
                         "0:.align 16\n"
                         "1:movl   %1,%%eax\n"
                           LSS_ENTRYPOINT
                         "2:popl   %0\n"
                           "addl   $(1b-0b),%0\n"
                           : "=a" (res)
                           : "i"  (__NR_rt_sigreturn));
      return res;
    }
    LSS_INLINE void (*LSS_NAME(restore)(void))(void) {
      /* On i386, the kernel does not know how to return from a signal
       * handler. Instead, it relies on user space to provide a
       * restorer function that calls the {rt_,}sigreturn() system call.
       * Unfortunately, we cannot just reference the glibc version of this
       * function, as glibc goes out of its way to make it inaccessible.
       */
      void (*res)(void);
      __asm__ __volatile__("call   2f\n"
                         "0:.align 16\n"
                         "1:pop    %%eax\n"
                           "movl   %1,%%eax\n"
                           LSS_ENTRYPOINT
                         "2:popl   %0\n"
                           "addl   $(1b-0b),%0\n"
                           : "=a" (res)
                           : "i"  (__NR_sigreturn));
      return res;
    }
  #elif defined(__x86_64__)
    /* There are no known problems with any of the _syscallX() macros
     * currently shipping for x86_64, but we still need to be able to define
     * our own version so that we can override the location of the errno
     * location (e.g. when using the clone() system call with the CLONE_VM
     * option).
     */
    #undef LSS_ENTRYPOINT
    #ifdef SYS_SYSCALL_ENTRYPOINT
    static inline void (**LSS_NAME(get_syscall_entrypoint)(void))(void) {
      void (**entrypoint)(void);
      asm volatile(".bss\n"
                   ".align 8\n"
                   ".globl " SYS_SYSCALL_ENTRYPOINT "\n"
                   ".common " SYS_SYSCALL_ENTRYPOINT ",8,8\n"
                   ".previous\n"
                   "mov " SYS_SYSCALL_ENTRYPOINT "@GOTPCREL(%%rip), %0\n"
                   : "=r"(entrypoint));
      return entrypoint;
    }

    #define LSS_ENTRYPOINT                                                    \
              ".bss\n"                                                        \
              ".align 8\n"                                                    \
              ".globl " SYS_SYSCALL_ENTRYPOINT "\n"                           \
              ".common " SYS_SYSCALL_ENTRYPOINT ",8,8\n"                      \
              ".previous\n"                                                   \
              "mov " SYS_SYSCALL_ENTRYPOINT "@GOTPCREL(%%rip), %%rcx\n"       \
              "mov  0(%%rcx), %%rcx\n"                                        \
              "test %%rcx, %%rcx\n"                                           \
              "jz   10001f\n"                                                 \
              "call *%%rcx\n"                                                 \
              "jmp  10002f\n"                                                 \
        "10001:syscall\n"                                                     \
        "10002:\n"

    #else
    #define LSS_ENTRYPOINT "syscall\n"
    #endif
    #undef  LSS_BODY
    #define LSS_BODY(type,name, ...)                                          \
          long __res;                                                         \
          __asm__ __volatile__(LSS_ENTRYPOINT                                 \
            : "=a" (__res) : "0" (__NR_##name),                               \
            ##__VA_ARGS__ : "r11", "rcx", "memory");                          \
          LSS_RETURN(type, __res)
    #undef _syscall0
    #define _syscall0(type,name)                                              \
      type LSS_NAME(name)() {                                                 \
        LSS_BODY(type, name);                                                 \
      }
    #undef _syscall1
    #define _syscall1(type,name,type1,arg1)                                   \
      type LSS_NAME(name)(type1 arg1) {                                       \
        LSS_BODY(type, name, "D" ((long)(arg1)));                             \
      }
    #undef _syscall2
    #define _syscall2(type,name,type1,arg1,type2,arg2)                        \
      type LSS_NAME(name)(type1 arg1, type2 arg2) {                           \
        LSS_BODY(type, name, "D" ((long)(arg1)), "S" ((long)(arg2)));         \
      }
    #undef _syscall3
    #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {               \
        LSS_BODY(type, name, "D" ((long)(arg1)), "S" ((long)(arg2)),          \
                             "d" ((long)(arg3)));                             \
      }
    #undef _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
          long __res;                                                         \
          __asm__ __volatile__("movq %5,%%r10;" LSS_ENTRYPOINT :              \
            "=a" (__res) : "0" (__NR_##name),                                 \
            "D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)),       \
            "r" ((long)(arg4)) : "r10", "r11", "rcx", "memory");              \
          LSS_RETURN(type, __res);                                            \
      }
    #undef _syscall5
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
          long __res;                                                         \
          __asm__ __volatile__("movq %5,%%r10; movq %6,%%r8;" LSS_ENTRYPOINT :\
            "=a" (__res) : "0" (__NR_##name),                                 \
            "D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)),       \
            "r" ((long)(arg4)), "r" ((long)(arg5)) :                          \
            "r8", "r10", "r11", "rcx", "memory");                             \
          LSS_RETURN(type, __res);                                            \
      }
    #undef _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
          long __res;                                                         \
          __asm__ __volatile__("movq %5,%%r10; movq %6,%%r8; movq %7,%%r9;"   \
                               LSS_ENTRYPOINT :                               \
            "=a" (__res) : "0" (__NR_##name),                                 \
            "D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)),       \
            "r" ((long)(arg4)), "r" ((long)(arg5)), "r" ((long)(arg6)) :      \
            "r8", "r9", "r10", "r11", "rcx", "memory");                       \
          LSS_RETURN(type, __res);                                            \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      {
        __asm__ __volatile__(/* if (fn == NULL)
                              *   return -EINVAL;
                              */
                             "testq  %4,%4\n"
                             "jz     1f\n"

                             /* if (child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "testq  %5,%5\n"
                             "jz     1f\n"

                             /* childstack -= 2*sizeof(void *);
                              */
                             "subq   $16,%5\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
                             "movq   %7,8(%5)\n"
                             "movq   %4,0(%5)\n"

                             /* %rax = syscall(%rax = __NR_clone,
                              *                %rdi = flags,
                              *                %rsi = child_stack,
                              *                %rdx = parent_tidptr,
                              *                %r8  = new_tls,
                              *                %r10 = child_tidptr)
                              */
                             "movq   %2,%%rax\n"
                             "movq   %9,%%r8\n"
                             "movq   %10,%%r10\n"
                             LSS_ENTRYPOINT

                             /* if (%rax != 0)
                              *   return;
                              */
                             "testq  %%rax,%%rax\n"
                             "jnz    1f\n"

                             /* In the child. Terminate frame pointer chain.
                              */
                             "xorq   %%rbp,%%rbp\n"

                             /* Call "fn(arg)".
                              */
                             "popq   %%rax\n"
                             "popq   %%rdi\n"
                             "call   *%%rax\n"

                             /* Call _exit(%ebx).
                              */
                             "movq   %%rax,%%rdi\n"
                             "movq   %3,%%rax\n"
                             LSS_ENTRYPOINT

                             /* Return to parent.
                              */
                           "1:\n"
                             : "=a" (__res)
                             : "0"(-EINVAL), "i"(__NR_clone), "i"(__NR_exit),
                               "r"(fn), "S"(child_stack), "D"(flags), "r"(arg),
                               "d"(parent_tidptr), "r"(newtls),
                               "r"(child_tidptr)
                             : "rsp", "memory", "r8", "r10", "r11", "rcx");
      }
      LSS_RETURN(int, __res);
    }
    LSS_INLINE _syscall2(int, arch_prctl, int, c, void *, a)
    LSS_INLINE _syscall4(int, fadvise64, int, fd, loff_t, offset, loff_t, len,
                         int,  advice)

    LSS_INLINE void (*LSS_NAME(restore_rt)(void))(void) {
      /* On x86-64, the kernel does not know how to return from
       * a signal handler. Instead, it relies on user space to provide a
       * restorer function that calls the rt_sigreturn() system call.
       * Unfortunately, we cannot just reference the glibc version of this
       * function, as glibc goes out of its way to make it inaccessible.
       */
      void (*res)(void);
      __asm__ __volatile__("call   2f\n"
                         "0:.align 16\n"
                         "1:movq   %1,%%rax\n"
                           LSS_ENTRYPOINT
                         "2:popq   %0\n"
                           "addq   $(1b-0b),%0\n"
                           : "=a" (res)
                           : "i"  (__NR_rt_sigreturn));
      return res;
    }
  #elif defined(__ARM_ARCH_3__)
    /* Most definitions of _syscallX() neglect to mark "memory" as being
     * clobbered. This causes problems with compilers, that do a better job
     * at optimizing across __asm__ calls.
     * So, we just have to redefine all of the _syscallX() macros.
     */
    #undef LSS_REG
    #define LSS_REG(r,a) register long __r##r __asm__("r"#r) = (long)a
    #undef  LSS_BODY
    #define LSS_BODY(type,name,args...)                                       \
          register long __res_r0 __asm__("r0");                               \
          long __res;                                                         \
          __asm__ __volatile__ (__syscall(name)                               \
                                : "=r"(__res_r0) : args : "lr", "memory");    \
          __res = __res_r0;                                                   \
          LSS_RETURN(type, __res)
    #undef _syscall0
    #define _syscall0(type, name)                                             \
      type LSS_NAME(name)() {                                                 \
        LSS_BODY(type, name);                                                 \
      }
    #undef _syscall1
    #define _syscall1(type, name, type1, arg1)                                \
      type LSS_NAME(name)(type1 arg1) {                                       \
        LSS_REG(0, arg1); LSS_BODY(type, name, "r"(__r0));                    \
      }
    #undef _syscall2
    #define _syscall2(type, name, type1, arg1, type2, arg2)                   \
      type LSS_NAME(name)(type1 arg1, type2 arg2) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1));                           \
      }
    #undef _syscall3
    #define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3)      \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {               \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2));                \
      }
    #undef _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4);                                                     \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3));     \
      }
    #undef _syscall5
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4));                                      \
      }
    #undef _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5); LSS_REG(5, arg6);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4), "r"(__r5));                           \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      {
        register int   __flags __asm__("r0") = flags;
        register void *__stack __asm__("r1") = child_stack;
        register void *__ptid  __asm__("r2") = parent_tidptr;
        register void *__tls   __asm__("r3") = newtls;
        register int  *__ctid  __asm__("r4") = child_tidptr;
        __asm__ __volatile__(/* if (fn == NULL || child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "cmp   %2,#0\n"
                             "cmpne %3,#0\n"
                             "moveq %0,%1\n"
                             "beq   1f\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
                             "str   %5,[%3,#-4]!\n"
                             "str   %2,[%3,#-4]!\n"

                             /* %r0 = syscall(%r0 = flags,
                              *               %r1 = child_stack,
                              *               %r2 = parent_tidptr,
                              *               %r3 = newtls,
                              *               %r4 = child_tidptr)
                              */
                             __syscall(clone)"\n"

                             /* if (%r0 != 0)
                              *   return %r0;
                              */
                             "movs  %0,r0\n"
                             "bne   1f\n"

                             /* In the child, now. Call "fn(arg)".
                              */
                             "ldr   r0,[sp, #4]\n"
                             "mov   lr,pc\n"
                             "ldr   pc,[sp]\n"

                             /* Call _exit(%r0).
                              */
                             __syscall(exit)"\n"
                           "1:\n"
                             : "=r" (__res)
                             : "i"(-EINVAL),
                               "r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
                               "r"(__ptid), "r"(__tls), "r"(__ctid)
                             : "cc", "lr", "memory");
      }
      LSS_RETURN(int, __res);
    }
  #elif defined(__ARM_EABI__)
    /* Most definitions of _syscallX() neglect to mark "memory" as being
     * clobbered. This causes problems with compilers, that do a better job
     * at optimizing across __asm__ calls.
     * So, we just have to redefine all fo the _syscallX() macros.
     */
    #undef LSS_REG
    #define LSS_REG(r,a) register long __r##r __asm__("r"#r) = (long)a
    #undef  LSS_BODY
    #define LSS_BODY(type,name,args...)                                       \
          register long __res_r0 __asm__("r0");                               \
          long __res;                                                         \
          __asm__ __volatile__ ("push {r7}\n"                                 \
                                "mov r7, %1\n"                                \
                                "swi 0x0\n"                                   \
                                "pop {r7}\n"                                  \
                                : "=r"(__res_r0)                              \
                                : "i"(__NR_##name) , ## args                  \
                                : "lr", "memory");                            \
          __res = __res_r0;                                                   \
          LSS_RETURN(type, __res)
    #undef _syscall0
    #define _syscall0(type, name)                                             \
      type LSS_NAME(name)() {                                                 \
        LSS_BODY(type, name);                                                 \
      }
    #undef _syscall1
    #define _syscall1(type, name, type1, arg1)                                \
      type LSS_NAME(name)(type1 arg1) {                                       \
        LSS_REG(0, arg1); LSS_BODY(type, name, "r"(__r0));                    \
      }
    #undef _syscall2
    #define _syscall2(type, name, type1, arg1, type2, arg2)                   \
      type LSS_NAME(name)(type1 arg1, type2 arg2) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1));                           \
      }
    #undef _syscall3
    #define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3)      \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {               \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2));                \
      }
    #undef _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4);                                                     \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3));     \
      }
    #undef _syscall5
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4));                                      \
      }
    #undef _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5); LSS_REG(5, arg6);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4), "r"(__r5));                           \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      {
        register int   __flags __asm__("r0") = flags;
        register void *__stack __asm__("r1") = child_stack;
        register void *__ptid  __asm__("r2") = parent_tidptr;
        register void *__tls   __asm__("r3") = newtls;
        register int  *__ctid  __asm__("r4") = child_tidptr;
        __asm__ __volatile__(/* if (fn == NULL || child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "cmp   %2,#0\n"
                             "it    ne\n"
                             "cmpne %3,#0\n"
                             "it    eq\n"
                             "moveq %0,%1\n"
                             "beq   1f\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
                             "str   %5,[%3,#-4]!\n"
                             "str   %2,[%3,#-4]!\n"

                             /* %r0 = syscall(%r0 = flags,
                              *               %r1 = child_stack,
                              *               %r2 = parent_tidptr,
                              *               %r3 = newtls,
                              *               %r4 = child_tidptr)
                              */
                             "mov r7, %9\n"
                             "swi 0x0\n"

                             /* if (%r0 != 0)
                              *   return %r0;
                              */
                             "movs  %0,r0\n"
                             "bne   1f\n"

                             /* In the child, now. Call "fn(arg)".
                              */
                             "ldr   r0,[sp, #4]\n"

                             /* When compiling for Thumb-2 the "MOV LR,PC" here
                              * won't work because it loads PC+4 into LR,
                              * whereas the LDR is a 4-byte instruction.
                              * This results in the child thread always
                              * crashing with an "Illegal Instruction" when it
                              * returned into the middle of the LDR instruction
                              * The instruction sequence used instead was
                              * recommended by
                              * "https://wiki.edubuntu.org/ARM/Thumb2PortingHowto#Quick_Reference".
                              */
                           #ifdef __thumb2__
                             "ldr   r7,[sp]\n"
                             "blx   r7\n"
                           #else
                             "mov   lr,pc\n"
                             "ldr   pc,[sp]\n"
                           #endif

                             /* Call _exit(%r0).
                              */
                             "mov r7, %10\n"
                             "swi 0x0\n"
                           "1:\n"
                             : "=r" (__res)
                             : "i"(-EINVAL),
                               "r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
                               "r"(__ptid), "r"(__tls), "r"(__ctid),
                               "i"(__NR_clone), "i"(__NR_exit)
                             : "cc", "r7", "lr", "memory");
      }
      LSS_RETURN(int, __res);
    }
  #elif defined(__mips__)
    #undef LSS_REG
    #define LSS_REG(r,a) register unsigned long __r##r __asm__("$"#r) =       \
                                 (unsigned long)(a)
    #undef  LSS_BODY
    #define LSS_BODY(type,name,r7,...)                                        \
          register unsigned long __v0 __asm__("$2") = __NR_##name;            \
          __asm__ __volatile__ ("syscall\n"                                   \
                                : "+r"(__v0), r7 (__r7)                       \
                                : "0"(__v0), ##__VA_ARGS__                    \
                                : "$8", "$9", "$10", "$11", "$12",            \
                                  "$13", "$14", "$15", "$24", "$25",          \
                                  "memory");                                  \
          LSS_RETURN(type, __v0, __r7)
    #undef _syscall0
    #define _syscall0(type, name)                                             \
      type LSS_NAME(name)() {                                                 \
        register unsigned long __r7 __asm__("$7");                            \
        LSS_BODY(type, name, "=r");                                           \
      }
    #undef _syscall1
    #define _syscall1(type, name, type1, arg1)                                \
      type LSS_NAME(name)(type1 arg1) {                                       \
        register unsigned long __r7 __asm__("$7");                            \
        LSS_REG(4, arg1); LSS_BODY(type, name, "=r", "r"(__r4));              \
      }
    #undef _syscall2
    #define _syscall2(type, name, type1, arg1, type2, arg2)                   \
      type LSS_NAME(name)(type1 arg1, type2 arg2) {                           \
        register unsigned long __r7 __asm__("$7");                            \
        LSS_REG(4, arg1); LSS_REG(5, arg2);                                   \
        LSS_BODY(type, name, "=r", "r"(__r4), "r"(__r5));                     \
      }
    #undef _syscall3
    #define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3)      \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {               \
        register unsigned long __r7 __asm__("$7");                            \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_BODY(type, name, "=r", "r"(__r4), "r"(__r5), "r"(__r6));          \
      }
    #undef _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_REG(7, arg4);                                                     \
        LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6));          \
      }
    #undef _syscall5
    #if _MIPS_SIM == _MIPS_SIM_ABI32
    /* The old 32bit MIPS system call API passes the fifth and sixth argument
     * on the stack, whereas the new APIs use registers "r8" and "r9".
     */
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_REG(7, arg4);                                                     \
        register unsigned long __v0 __asm__("$2") = __NR_##name;              \
        __asm__ __volatile__ (".set noreorder\n"                              \
                              "subu  $29, 32\n"                               \
                              "sw    %5, 16($29)\n"                           \
                              "syscall\n"                                     \
                              "addiu $29, 32\n"                               \
                              ".set reorder\n"                                \
                              : "+r"(__v0), "+r" (__r7)                       \
                              : "r"(__r4), "r"(__r5),                         \
                                "r"(__r6), "r" ((unsigned long)arg5)          \
                              : "$8", "$9", "$10", "$11", "$12",              \
                                "$13", "$14", "$15", "$24", "$25",            \
                                "memory");                                    \
        LSS_RETURN(type, __v0, __r7);                                         \
      }
    #else
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_REG(7, arg4); LSS_REG(8, arg5);                                   \
        LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6),           \
                 "r"(__r8));                                                  \
      }
    #endif
    #undef _syscall6
    #if _MIPS_SIM == _MIPS_SIM_ABI32
    /* The old 32bit MIPS system call API passes the fifth and sixth argument
     * on the stack, whereas the new APIs use registers "r8" and "r9".
     */
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_REG(7, arg4);                                                     \
        register unsigned long __v0 __asm__("$2") = __NR_##name;              \
        __asm__ __volatile__ (".set noreorder\n"                              \
                              "subu  $29, 32\n"                               \
                              "sw    %5, 16($29)\n"                           \
                              "sw    %6, 20($29)\n"                           \
                              "syscall\n"                                     \
                              "addiu $29, 32\n"                               \
                              ".set reorder\n"                                \
                              : "+r"(__v0), "+r" (__r7)                       \
                              : "r"(__r4), "r"(__r5),                         \
                                "r"(__r6), "r" ((unsigned long)arg5),         \
                                "r" ((unsigned long)arg6)                     \
                              : "$8", "$9", "$10", "$11", "$12",              \
                                "$13", "$14", "$15", "$24", "$25",            \
                                "memory");                                    \
        LSS_RETURN(type, __v0, __r7);                                         \
      }
    #else
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5,type6 arg6) {                            \
        LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3);                 \
        LSS_REG(7, arg4); LSS_REG(8, arg5); LSS_REG(9, arg6);                 \
        LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6),           \
                 "r"(__r8), "r"(__r9));                                       \
      }
    #endif
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      register unsigned long __v0 __asm__("$2");
      register unsigned long __r7 __asm__("$7") = (unsigned long)newtls;
      {
        register int   __flags __asm__("$4") = flags;
        register void *__stack __asm__("$5") = child_stack;
        register void *__ptid  __asm__("$6") = parent_tidptr;
        register int  *__ctid  __asm__("$8") = child_tidptr;
        __asm__ __volatile__(
          #if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
                             "subu  $29,24\n"
          #elif _MIPS_SIM == _MIPS_SIM_NABI32
                             "sub   $29,16\n"
          #else
                             "dsubu $29,16\n"
          #endif

                             /* if (fn == NULL || child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "li    %0,%2\n"
                             "beqz  %5,1f\n"
                             "beqz  %6,1f\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
          #if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
                             "subu  %6,32\n"
                             "sw    %5,0(%6)\n"
                             "sw    %8,4(%6)\n"
          #elif _MIPS_SIM == _MIPS_SIM_NABI32
                             "sub   %6,32\n"
                             "sw    %5,0(%6)\n"
                             "sw    %8,8(%6)\n"
          #else
                             "dsubu %6,32\n"
                             "sd    %5,0(%6)\n"
                             "sd    %8,8(%6)\n"
          #endif

                             /* $7 = syscall($4 = flags,
                              *              $5 = child_stack,
                              *              $6 = parent_tidptr,
                              *              $7 = newtls,
                              *              $8 = child_tidptr)
                              */
                             "li    $2,%3\n"
                             "syscall\n"

                             /* if ($7 != 0)
                              *   return $2;
                              */
                             "bnez  $7,1f\n"
                             "bnez  $2,1f\n"

                             /* In the child, now. Call "fn(arg)".
                              */
          #if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
                            "lw    $25,0($29)\n"
                            "lw    $4,4($29)\n"
          #elif _MIPS_SIM == _MIPS_SIM_NABI32
                            "lw    $25,0($29)\n"
                            "lw    $4,8($29)\n"
          #else
                            "ld    $25,0($29)\n"
                            "ld    $4,8($29)\n"
          #endif
                            "jalr  $25\n"

                             /* Call _exit($2)
                              */
                            "move  $4,$2\n"
                            "li    $2,%4\n"
                            "syscall\n"

                           "1:\n"
          #if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
                             "addu  $29, 24\n"
          #elif _MIPS_SIM == _MIPS_SIM_NABI32
                             "add   $29, 16\n"
          #else
                             "daddu $29,16\n"
          #endif
                             : "=&r" (__v0), "+r" (__r7)
                             : "i"(-EINVAL), "i"(__NR_clone), "i"(__NR_exit),
                               "r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
                               "r"(__ptid), "r"(__r7), "r"(__ctid)
                             : "$9", "$10", "$11", "$12", "$13", "$14", "$15",
                               "$24", "$25", "memory");
      }
      LSS_RETURN(int, __v0, __r7);
    }
  #elif defined (__PPC__)
    #undef  LSS_LOADARGS_0
    #define LSS_LOADARGS_0(name, dummy...)                                    \
        __sc_0 = __NR_##name
    #undef  LSS_LOADARGS_1
    #define LSS_LOADARGS_1(name, arg1)                                        \
            LSS_LOADARGS_0(name);                                             \
            __sc_3 = (unsigned long) (arg1)
    #undef  LSS_LOADARGS_2
    #define LSS_LOADARGS_2(name, arg1, arg2)                                  \
            LSS_LOADARGS_1(name, arg1);                                       \
            __sc_4 = (unsigned long) (arg2)
    #undef  LSS_LOADARGS_3
    #define LSS_LOADARGS_3(name, arg1, arg2, arg3)                            \
            LSS_LOADARGS_2(name, arg1, arg2);                                 \
            __sc_5 = (unsigned long) (arg3)
    #undef  LSS_LOADARGS_4
    #define LSS_LOADARGS_4(name, arg1, arg2, arg3, arg4)                      \
            LSS_LOADARGS_3(name, arg1, arg2, arg3);                           \
            __sc_6 = (unsigned long) (arg4)
    #undef  LSS_LOADARGS_5
    #define LSS_LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5)                \
            LSS_LOADARGS_4(name, arg1, arg2, arg3, arg4);                     \
            __sc_7 = (unsigned long) (arg5)
    #undef  LSS_LOADARGS_6
    #define LSS_LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6)          \
            LSS_LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5);               \
            __sc_8 = (unsigned long) (arg6)
    #undef  LSS_ASMINPUT_0
    #define LSS_ASMINPUT_0 "0" (__sc_0)
    #undef  LSS_ASMINPUT_1
    #define LSS_ASMINPUT_1 LSS_ASMINPUT_0, "1" (__sc_3)
    #undef  LSS_ASMINPUT_2
    #define LSS_ASMINPUT_2 LSS_ASMINPUT_1, "2" (__sc_4)
    #undef  LSS_ASMINPUT_3
    #define LSS_ASMINPUT_3 LSS_ASMINPUT_2, "3" (__sc_5)
    #undef  LSS_ASMINPUT_4
    #define LSS_ASMINPUT_4 LSS_ASMINPUT_3, "4" (__sc_6)
    #undef  LSS_ASMINPUT_5
    #define LSS_ASMINPUT_5 LSS_ASMINPUT_4, "5" (__sc_7)
    #undef  LSS_ASMINPUT_6
    #define LSS_ASMINPUT_6 LSS_ASMINPUT_5, "6" (__sc_8)
    #undef  LSS_BODY
    #define LSS_BODY(nr, type, name, args...)                                 \
        long __sc_ret, __sc_err;                                              \
        {                                                                     \
                        register unsigned long __sc_0 __asm__ ("r0");         \
                        register unsigned long __sc_3 __asm__ ("r3");         \
                        register unsigned long __sc_4 __asm__ ("r4");         \
                        register unsigned long __sc_5 __asm__ ("r5");         \
                        register unsigned long __sc_6 __asm__ ("r6");         \
                        register unsigned long __sc_7 __asm__ ("r7");         \
                        register unsigned long __sc_8 __asm__ ("r8");         \
                                                                              \
            LSS_LOADARGS_##nr(name, args);                                    \
            __asm__ __volatile__                                              \
                ("sc\n\t"                                                     \
                 "mfcr %0"                                                    \
                 : "=&r" (__sc_0),                                            \
                   "=&r" (__sc_3), "=&r" (__sc_4),                            \
                   "=&r" (__sc_5), "=&r" (__sc_6),                            \
                   "=&r" (__sc_7), "=&r" (__sc_8)                             \
                 : LSS_ASMINPUT_##nr                                          \
                 : "cr0", "ctr", "memory",                                    \
                   "r9", "r10", "r11", "r12");                                \
            __sc_ret = __sc_3;                                                \
            __sc_err = __sc_0;                                                \
        }                                                                     \
        LSS_RETURN(type, __sc_ret, __sc_err)
    #undef _syscall0
    #define _syscall0(type, name)                                             \
       type LSS_NAME(name)(void) {                                            \
          LSS_BODY(0, type, name);                                            \
       }
    #undef _syscall1
    #define _syscall1(type, name, type1, arg1)                                \
       type LSS_NAME(name)(type1 arg1) {                                      \
          LSS_BODY(1, type, name, arg1);                                      \
       }
    #undef _syscall2
    #define _syscall2(type, name, type1, arg1, type2, arg2)                   \
       type LSS_NAME(name)(type1 arg1, type2 arg2) {                          \
          LSS_BODY(2, type, name, arg1, arg2);                                \
       }
    #undef _syscall3
    #define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3)      \
       type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {              \
          LSS_BODY(3, type, name, arg1, arg2, arg3);                          \
       }
    #undef _syscall4
    #define _syscall4(type, name, type1, arg1, type2, arg2, type3, arg3,      \
                                  type4, arg4)                                \
       type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {  \
          LSS_BODY(4, type, name, arg1, arg2, arg3, arg4);                    \
       }
    #undef _syscall5
    #define _syscall5(type, name, type1, arg1, type2, arg2, type3, arg3,      \
                                  type4, arg4, type5, arg5)                   \
       type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,    \
                                               type5 arg5) {                  \
          LSS_BODY(5, type, name, arg1, arg2, arg3, arg4, arg5);              \
       }
    #undef _syscall6
    #define _syscall6(type, name, type1, arg1, type2, arg2, type3, arg3,      \
                                  type4, arg4, type5, arg5, type6, arg6)      \
       type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,    \
                                               type5 arg5, type6 arg6) {      \
          LSS_BODY(6, type, name, arg1, arg2, arg3, arg4, arg5, arg6);        \
       }
    /* clone function adapted from glibc 2.3.6 clone.S                       */
    /* TODO(csilvers): consider wrapping some args up in a struct, like we
     * do for i386's _syscall6, so we can compile successfully on gcc 2.95
     */
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __ret, __err;
      {
        register int (*__fn)(void *)    __asm__ ("r8")  = fn;
        register void *__cstack                 __asm__ ("r4")  = child_stack;
        register int __flags                    __asm__ ("r3")  = flags;
        register void * __arg                   __asm__ ("r9")  = arg;
        register int * __ptidptr                __asm__ ("r5")  = parent_tidptr;
        register void * __newtls                __asm__ ("r6")  = newtls;
        register int * __ctidptr                __asm__ ("r7")  = child_tidptr;
        __asm__ __volatile__(
            /* check for fn == NULL
             * and child_stack == NULL
             */
            "cmpwi cr0, %6, 0\n\t"
            "cmpwi cr1, %7, 0\n\t"
            "cror cr0*4+eq, cr1*4+eq, cr0*4+eq\n\t"
            "beq- cr0, 1f\n\t"

            /* set up stack frame for child                                  */
            "clrrwi %7, %7, 4\n\t"
            "li 0, 0\n\t"
            "stwu 0, -16(%7)\n\t"

            /* fn, arg, child_stack are saved across the syscall: r28-30     */
            "mr 28, %6\n\t"
            "mr 29, %7\n\t"
            "mr 27, %9\n\t"

            /* syscall                                                       */
            "li 0, %4\n\t"
            /* flags already in r3
             * child_stack already in r4
             * ptidptr already in r5
             * newtls already in r6
             * ctidptr already in r7
             */
            "sc\n\t"

            /* Test if syscall was successful                                */
            "cmpwi cr1, 3, 0\n\t"
            "crandc cr1*4+eq, cr1*4+eq, cr0*4+so\n\t"
            "bne- cr1, 1f\n\t"

            /* Do the function call                                          */
            "mtctr 28\n\t"
            "mr 3, 27\n\t"
            "bctrl\n\t"

            /* Call _exit(r3)                                                */
            "li 0, %5\n\t"
            "sc\n\t"

            /* Return to parent                                              */
            "1:\n"
            "mfcr %1\n\t"
            "mr %0, 3\n\t"
              : "=r" (__ret), "=r" (__err)
              : "0" (-1), "1" (EINVAL),
                "i" (__NR_clone), "i" (__NR_exit),
                "r" (__fn), "r" (__cstack), "r" (__flags),
                "r" (__arg), "r" (__ptidptr), "r" (__newtls),
                "r" (__ctidptr)
              : "cr0", "cr1", "memory", "ctr",
                "r0", "r29", "r27", "r28");
      }
      LSS_RETURN(int, __ret, __err);
    }
  #endif
  #define __NR__exit   __NR_exit
  #define __NR__gettid __NR_gettid
  #define __NR__mremap __NR_mremap
  LSS_INLINE _syscall1(int,     brk,             void *,      e)
  LSS_INLINE _syscall1(int,     chdir,           const char *,p)
  LSS_INLINE _syscall1(int,     close,           int,         f)
  LSS_INLINE _syscall2(int,     clock_getres,    int,         c,
                       struct kernel_timespec*, t)
  LSS_INLINE _syscall2(int,     clock_gettime,   int,         c,
                       struct kernel_timespec*, t)
  LSS_INLINE _syscall1(int,     dup,             int,         f)
  LSS_INLINE _syscall2(int,     dup2,            int,         s,
                       int,            d)
  LSS_INLINE _syscall3(int,     execve,          const char*, f,
                       const char*const*,a,const char*const*, e)
  LSS_INLINE _syscall1(int,     _exit,           int,         e)
  LSS_INLINE _syscall1(int,     exit_group,      int,         e)
  LSS_INLINE _syscall3(int,     fcntl,           int,         f,
                       int,            c, long,   a)
  LSS_INLINE _syscall0(pid_t,   fork)
  LSS_INLINE _syscall2(int,     fstat,           int,         f,
                      struct kernel_stat*,   b)
  LSS_INLINE _syscall2(int,     fstatfs,         int,         f,
                      struct kernel_statfs*, b)
  LSS_INLINE _syscall2(int, ftruncate,           int,         f,
                       off_t,          l)
  LSS_INLINE _syscall4(int,     futex,           int*,        a,
                       int,            o, int,    v,
                      struct kernel_timespec*, t)
  LSS_INLINE _syscall3(int,     getdents,        int,         f,
                      struct kernel_dirent*, d, int,    c)
  LSS_INLINE _syscall3(int,     getdents64,      int,         f,
                      struct kernel_dirent64*, d, int,    c)
  LSS_INLINE _syscall0(gid_t,   getegid)
  LSS_INLINE _syscall0(uid_t,   geteuid)
  LSS_INLINE _syscall0(pid_t,   getpgrp)
  LSS_INLINE _syscall0(pid_t,   getpid)
  LSS_INLINE _syscall0(pid_t,   getppid)
  LSS_INLINE _syscall2(int,     getpriority,     int,         a,
                       int,            b)
  LSS_INLINE _syscall3(int,     getresgid,       gid_t *,     r,
                       gid_t *,         e,       gid_t *,     s)
  LSS_INLINE _syscall3(int,     getresuid,       uid_t *,     r,
                       uid_t *,         e,       uid_t *,     s)
#if !defined(__ARM_EABI__)
  LSS_INLINE _syscall2(int,     getrlimit,       int,         r,
                      struct kernel_rlimit*, l)
#endif
  LSS_INLINE _syscall1(pid_t,   getsid,          pid_t,       p)
  LSS_INLINE _syscall0(pid_t,   _gettid)
  LSS_INLINE _syscall2(pid_t,   gettimeofday,    struct kernel_timeval*, t,
                       void*, tz)
  LSS_INLINE _syscall5(int,     setxattr,        const char *,p,
                       const char *,   n,        const void *,v,
                       size_t,         s,        int,         f)
  LSS_INLINE _syscall5(int,     lsetxattr,       const char *,p,
                       const char *,   n,        const void *,v,
                       size_t,         s,        int,         f)
  LSS_INLINE _syscall4(ssize_t, getxattr,        const char *,p,
                       const char *,   n,        void *,      v, size_t, s)
  LSS_INLINE _syscall4(ssize_t, lgetxattr,       const char *,p,
                       const char *,   n,        void *,      v, size_t, s)
  LSS_INLINE _syscall3(ssize_t, listxattr,       const char *,p,
                       char *,   l,              size_t,      s)
  LSS_INLINE _syscall3(ssize_t, llistxattr,      const char *,p,
                       char *,   l,              size_t,      s)
  LSS_INLINE _syscall3(int,     ioctl,           int,         d,
                       int,     r,               void *,      a)
  LSS_INLINE _syscall2(int,     ioprio_get,      int,         which,
                       int,     who)
  LSS_INLINE _syscall3(int,     ioprio_set,      int,         which,
                       int,     who,             int,         ioprio)
  LSS_INLINE _syscall2(int,     kill,            pid_t,       p,
                       int,            s)
  LSS_INLINE _syscall3(off_t,   lseek,           int,         f,
                       off_t,          o, int,    w)
  LSS_INLINE _syscall2(int,     munmap,          void*,       s,
                       size_t,         l)
  LSS_INLINE _syscall6(long,    move_pages,      pid_t,       p,
                       unsigned long,  n, void **,g, int *,   d,
                       int *,          s, int,    f)
  LSS_INLINE _syscall3(int,     mprotect,        const void *,a,
                       size_t,         l,        int,         p)
  LSS_INLINE _syscall5(void*,   _mremap,         void*,       o,
                       size_t,         os,       size_t,      ns,
                       unsigned long,  f, void *, a)
  LSS_INLINE _syscall3(int,     open,            const char*, p,
                       int,            f, int,    m)
  LSS_INLINE _syscall3(int,     poll,           struct kernel_pollfd*, u,
                       unsigned int,   n, int,    t)
  LSS_INLINE _syscall2(int,     prctl,           int,         o,
                       long,           a)
  LSS_INLINE _syscall4(long,    ptrace,          int,         r,
                       pid_t,          p, void *, a, void *, d)
  #if defined(__NR_quotactl)
    // Defined on x86_64 / i386 only
    LSS_INLINE _syscall4(int,  quotactl,  int,  cmd,  const char *, special,
                         int, id, caddr_t, addr)
  #endif
  LSS_INLINE _syscall3(ssize_t, read,            int,         f,
                       void *,         b, size_t, c)
  LSS_INLINE _syscall3(int,     readlink,        const char*, p,
                       char*,          b, size_t, s)
  LSS_INLINE _syscall4(int,     rt_sigaction,    int,         s,
                       const struct kernel_sigaction*, a,
                       struct kernel_sigaction*, o, size_t,   c)
  LSS_INLINE _syscall2(int, rt_sigpending, struct kernel_sigset_t *, s,
                       size_t,         c)
  LSS_INLINE _syscall4(int, rt_sigprocmask,      int,         h,
                       const struct kernel_sigset_t*,  s,
                       struct kernel_sigset_t*,        o, size_t, c)
  LSS_INLINE _syscall2(int, rt_sigsuspend,
                       const struct kernel_sigset_t*, s,  size_t, c)
  LSS_INLINE _syscall3(int,     sched_getaffinity,pid_t,      p,
                       unsigned int,   l, unsigned long *, m)
  LSS_INLINE _syscall3(int,     sched_setaffinity,pid_t,      p,
                       unsigned int,   l, unsigned long *, m)
  LSS_INLINE _syscall0(int,     sched_yield)
  LSS_INLINE _syscall1(long,    set_tid_address, int *,       t)
  LSS_INLINE _syscall1(int,     setfsgid,        gid_t,       g)
  LSS_INLINE _syscall1(int,     setfsuid,        uid_t,       u)
  LSS_INLINE _syscall1(int,     setuid,          uid_t,       u)
  LSS_INLINE _syscall1(int,     setgid,          gid_t,       g)
  LSS_INLINE _syscall2(int,     setpgid,         pid_t,       p,
                       pid_t,          g)
  LSS_INLINE _syscall3(int,     setpriority,     int,         a,
                       int,            b, int,    p)
  LSS_INLINE _syscall3(int,     setresgid,       gid_t,       r,
                       gid_t,          e, gid_t,  s)
  LSS_INLINE _syscall3(int,     setresuid,       uid_t,       r,
                       uid_t,          e, uid_t,  s)
  LSS_INLINE _syscall2(int,     setrlimit,       int,         r,
                       const struct kernel_rlimit*, l)
  LSS_INLINE _syscall0(pid_t,    setsid)
  LSS_INLINE _syscall2(int,     sigaltstack,     const stack_t*, s,
                       const stack_t*, o)
  #if defined(__NR_sigreturn)
  LSS_INLINE _syscall1(int,     sigreturn,       unsigned long, u)
  #endif
  LSS_INLINE _syscall2(int,     stat,            const char*, f,
                      struct kernel_stat*,   b)
  LSS_INLINE _syscall2(int,     statfs,          const char*, f,
                      struct kernel_statfs*, b)
  LSS_INLINE _syscall3(int,     tgkill,          pid_t,       p,
                       pid_t,          t, int,            s)
  LSS_INLINE _syscall2(int,     tkill,           pid_t,       p,
                       int,            s)
  LSS_INLINE _syscall1(int,     unlink,           const char*, f)
  LSS_INLINE _syscall3(ssize_t, write,            int,        f,
                       const void *,   b, size_t, c)
  LSS_INLINE _syscall3(ssize_t, writev,           int,        f,
                       const struct kernel_iovec*, v, size_t, c)
  #if defined(__NR_getcpu)
    LSS_INLINE _syscall3(long, getcpu, unsigned *, cpu,
                         unsigned *, node, void *, unused)
  #endif
  #if defined(__x86_64__) ||                                                  \
     (defined(__mips__) && _MIPS_SIM != _MIPS_SIM_ABI32)
    LSS_INLINE _syscall3(int, recvmsg,            int,   s,
                        struct kernel_msghdr*,     m, int, f)
    LSS_INLINE _syscall3(int, sendmsg,            int,   s,
                         const struct kernel_msghdr*, m, int, f)
    LSS_INLINE _syscall6(int, sendto,             int,   s,
                         const void*,             m, size_t, l,
                         int,                     f,
                         const struct kernel_sockaddr*, a, int, t)
    LSS_INLINE _syscall2(int, shutdown,           int,   s,
                         int,                     h)
    LSS_INLINE _syscall3(int, socket,             int,   d,
                         int,                     t, int,       p)
    LSS_INLINE _syscall4(int, socketpair,         int,   d,
                         int,                     t, int,       p, int*, s)
  #endif
  #if defined(__x86_64__)
    LSS_INLINE _syscall4(int, fallocate, int, fd, int, mode,
                         loff_t, offset, loff_t, len)

    LSS_INLINE int LSS_NAME(getresgid32)(gid_t *rgid,
                                         gid_t *egid,
                                         gid_t *sgid) {
      return LSS_NAME(getresgid)(rgid, egid, sgid);
    }

    LSS_INLINE int LSS_NAME(getresuid32)(uid_t *ruid,
                                         uid_t *euid,
                                         uid_t *suid) {
      return LSS_NAME(getresuid)(ruid, euid, suid);
    }

    LSS_INLINE _syscall6(void*, mmap,              void*, s,
                         size_t,                   l, int,               p,
                         int,                      f, int,               d,
                         __off64_t,                o)

    LSS_INLINE _syscall4(int, newfstatat,         int,   d,
                         const char *,            p,
                        struct kernel_stat*,       b, int, f)

    LSS_INLINE int LSS_NAME(setfsgid32)(gid_t gid) {
      return LSS_NAME(setfsgid)(gid);
    }

    LSS_INLINE int LSS_NAME(setfsuid32)(uid_t uid) {
      return LSS_NAME(setfsuid)(uid);
    }

    LSS_INLINE int LSS_NAME(setresgid32)(gid_t rgid, gid_t egid, gid_t sgid) {
      return LSS_NAME(setresgid)(rgid, egid, sgid);
    }

    LSS_INLINE int LSS_NAME(setresuid32)(uid_t ruid, uid_t euid, uid_t suid) {
      return LSS_NAME(setresuid)(ruid, euid, suid);
    }

    LSS_INLINE int LSS_NAME(sigaction)(int signum,
                                       const struct kernel_sigaction *act,
                                       struct kernel_sigaction *oldact) {
      /* On x86_64, the kernel requires us to always set our own
       * SA_RESTORER in order to be able to return from a signal handler.
       * This function must have a "magic" signature that the "gdb"
       * (and maybe the kernel?) can recognize.
       */
      if (act != NULL && !(act->sa_flags & SA_RESTORER)) {
        struct kernel_sigaction a = *act;
        a.sa_flags   |= SA_RESTORER;
        a.sa_restorer = LSS_NAME(restore_rt)();
        return LSS_NAME(rt_sigaction)(signum, &a, oldact,
                                      (KERNEL_NSIG+7)/8);
      } else {
        return LSS_NAME(rt_sigaction)(signum, act, oldact,
                                      (KERNEL_NSIG+7)/8);
      }
    }

    LSS_INLINE int LSS_NAME(sigpending)(struct kernel_sigset_t *set) {
      return LSS_NAME(rt_sigpending)(set, (KERNEL_NSIG+7)/8);
    }

    LSS_INLINE int LSS_NAME(sigprocmask)(int how,
                                         const struct kernel_sigset_t *set,
                                         struct kernel_sigset_t *oldset) {
      return LSS_NAME(rt_sigprocmask)(how, set, oldset, (KERNEL_NSIG+7)/8);
    }

    LSS_INLINE int LSS_NAME(sigsuspend)(const struct kernel_sigset_t *set) {
      return LSS_NAME(rt_sigsuspend)(set, (KERNEL_NSIG+7)/8);
    }
  #endif
  #if defined(__x86_64__) || defined(__ARM_ARCH_3__) ||                       \
      defined(__ARM_EABI__) ||                                             \
     (defined(__mips__) && _MIPS_SIM != _MIPS_SIM_ABI32)
    LSS_INLINE _syscall4(pid_t, wait4,            pid_t, p,
                         int*,                    s, int,       o,
                        struct kernel_rusage*,     r)

    LSS_INLINE pid_t LSS_NAME(waitpid)(pid_t pid, int *status, int options){
      return LSS_NAME(wait4)(pid, status, options, 0);
    }
  #endif
  #if defined(__i386__) || defined(__x86_64__)
    LSS_INLINE _syscall4(int, openat, int, d, const char *, p, int, f, int, m)
    LSS_INLINE _syscall3(int, unlinkat, int, d, const char *, p, int, f)
  #endif
  #if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__)
    #define __NR__getresgid32 __NR_getresgid32
    #define __NR__getresuid32 __NR_getresuid32
    #define __NR__setfsgid32  __NR_setfsgid32
    #define __NR__setfsuid32  __NR_setfsuid32
    #define __NR__setresgid32 __NR_setresgid32
    #define __NR__setresuid32 __NR_setresuid32
#if defined(__ARM_EABI__)
    LSS_INLINE _syscall2(int,   ugetrlimit,        int,          r,
                        struct kernel_rlimit*, l)
#endif
    LSS_INLINE _syscall3(int,     _getresgid32,    gid_t *,      r,
                         gid_t *,            e,    gid_t *,      s)
    LSS_INLINE _syscall3(int,     _getresuid32,    uid_t *,      r,
                         uid_t *,            e,    uid_t *,      s)
    LSS_INLINE _syscall1(int,     _setfsgid32,     gid_t,        f)
    LSS_INLINE _syscall1(int,     _setfsuid32,     uid_t,        f)
    LSS_INLINE _syscall3(int,     _setresgid32,    gid_t,        r,
                         gid_t,              e,    gid_t,        s)
    LSS_INLINE _syscall3(int,     _setresuid32,    uid_t,        r,
                         uid_t,              e,    uid_t,        s)

    LSS_INLINE int LSS_NAME(getresgid32)(gid_t *rgid,
                                         gid_t *egid,
                                         gid_t *sgid) {
      int rc;
      if ((rc = LSS_NAME(_getresgid32)(rgid, egid, sgid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((rgid == NULL) || (egid == NULL) || (sgid == NULL)) {
          return EFAULT;
        }
        // Clear the high bits first, since getresgid only sets 16 bits
        *rgid = *egid = *sgid = 0;
        rc = LSS_NAME(getresgid)(rgid, egid, sgid);
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(getresuid32)(uid_t *ruid,
                                         uid_t *euid,
                                         uid_t *suid) {
      int rc;
      if ((rc = LSS_NAME(_getresuid32)(ruid, euid, suid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((ruid == NULL) || (euid == NULL) || (suid == NULL)) {
          return EFAULT;
        }
        // Clear the high bits first, since getresuid only sets 16 bits
        *ruid = *euid = *suid = 0;
        rc = LSS_NAME(getresuid)(ruid, euid, suid);
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(setfsgid32)(gid_t gid) {
      int rc;
      if ((rc = LSS_NAME(_setfsgid32)(gid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((unsigned int)gid & ~0xFFFFu) {
          rc = EINVAL;
        } else {
          rc = LSS_NAME(setfsgid)(gid);
        }
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(setfsuid32)(uid_t uid) {
      int rc;
      if ((rc = LSS_NAME(_setfsuid32)(uid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((unsigned int)uid & ~0xFFFFu) {
          rc = EINVAL;
        } else {
          rc = LSS_NAME(setfsuid)(uid);
        }
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(setresgid32)(gid_t rgid, gid_t egid, gid_t sgid) {
      int rc;
      if ((rc = LSS_NAME(_setresgid32)(rgid, egid, sgid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((unsigned int)rgid & ~0xFFFFu ||
            (unsigned int)egid & ~0xFFFFu ||
            (unsigned int)sgid & ~0xFFFFu) {
          rc = EINVAL;
        } else {
          rc = LSS_NAME(setresgid)(rgid, egid, sgid);
        }
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(setresuid32)(uid_t ruid, uid_t euid, uid_t suid) {
      int rc;
      if ((rc = LSS_NAME(_setresuid32)(ruid, euid, suid)) < 0 &&
          LSS_ERRNO == ENOSYS) {
        if ((unsigned int)ruid & ~0xFFFFu ||
            (unsigned int)euid & ~0xFFFFu ||
            (unsigned int)suid & ~0xFFFFu) {
          rc = EINVAL;
        } else {
          rc = LSS_NAME(setresuid)(ruid, euid, suid);
        }
      }
      return rc;
    }
  #endif
  LSS_INLINE int LSS_NAME(sigemptyset)(struct kernel_sigset_t *set) {
    memset(&set->sig, 0, sizeof(set->sig));
    return 0;
  }

  LSS_INLINE int LSS_NAME(sigfillset)(struct kernel_sigset_t *set) {
    memset(&set->sig, -1, sizeof(set->sig));
    return 0;
  }

  LSS_INLINE int LSS_NAME(sigaddset)(struct kernel_sigset_t *set,
                                     int signum) {
    if (signum < 1 || signum > (int)(8*sizeof(set->sig))) {
      LSS_ERRNO = EINVAL;
      return -1;
    } else {
      set->sig[(signum - 1)/(8*sizeof(set->sig[0]))]
          |= 1UL << ((signum - 1) % (8*sizeof(set->sig[0])));
      return 0;
    }
  }

  LSS_INLINE int LSS_NAME(sigdelset)(struct kernel_sigset_t *set,
                                        int signum) {
    if (signum < 1 || signum > (int)(8*sizeof(set->sig))) {
      LSS_ERRNO = EINVAL;
      return -1;
    } else {
      set->sig[(signum - 1)/(8*sizeof(set->sig[0]))]
          &= ~(1UL << ((signum - 1) % (8*sizeof(set->sig[0]))));
      return 0;
    }
  }

  LSS_INLINE int LSS_NAME(sigismember)(struct kernel_sigset_t *set,
                                          int signum) {
    if (signum < 1 || signum > (int)(8*sizeof(set->sig))) {
      LSS_ERRNO = EINVAL;
      return -1;
    } else {
      return !!(set->sig[(signum - 1)/(8*sizeof(set->sig[0]))] &
                (1UL << ((signum - 1) % (8*sizeof(set->sig[0])))));
    }
  }
  #if defined(__i386__) || defined(__ARM_ARCH_3__) ||                         \
      defined(__ARM_EABI__) ||                                             \
     (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32) || defined(__PPC__)
    #define __NR__sigaction   __NR_sigaction
    #define __NR__sigpending  __NR_sigpending
    #define __NR__sigprocmask __NR_sigprocmask
    #define __NR__sigsuspend  __NR_sigsuspend
    #define __NR__socketcall  __NR_socketcall
    LSS_INLINE _syscall2(int, fstat64,             int, f,
                         struct kernel_stat64 *, b)
    LSS_INLINE _syscall5(int, _llseek,     uint, fd,
                         unsigned long, hi, unsigned long, lo,
                         loff_t *, res, uint, wh)
#if !defined(__ARM_EABI__)
    LSS_INLINE _syscall1(void*, mmap,              void*, a)
#endif
    LSS_INLINE _syscall6(void*, mmap2,             void*, s,
                         size_t,                   l, int,               p,
                         int,                      f, int,               d,
                         off_t,                o)
    LSS_INLINE _syscall3(int,   _sigaction,        int,   s,
                         const struct kernel_old_sigaction*,  a,
                         struct kernel_old_sigaction*,        o)
    LSS_INLINE _syscall1(int,   _sigpending, unsigned long*, s)
    LSS_INLINE _syscall3(int,   _sigprocmask,      int,   h,
                         const unsigned long*,     s,
                         unsigned long*,           o)
    #ifdef __PPC__
    LSS_INLINE _syscall1(int, _sigsuspend,         unsigned long, s)
    #else
    LSS_INLINE _syscall3(int, _sigsuspend,         const void*, a,
                         int,                      b,
                         unsigned long,            s)
    #endif
    LSS_INLINE _syscall2(int, stat64,              const char *, p,
                         struct kernel_stat64 *, b)

    LSS_INLINE int LSS_NAME(sigaction)(int signum,
                                       const struct kernel_sigaction *act,
                                       struct kernel_sigaction *oldact) {
      int old_errno = LSS_ERRNO;
      int rc;
      struct kernel_sigaction a;
      if (act != NULL) {
        a             = *act;
        #ifdef __i386__
        /* On i386, the kernel requires us to always set our own
         * SA_RESTORER when using realtime signals. Otherwise, it does not
         * know how to return from a signal handler. This function must have
         * a "magic" signature that the "gdb" (and maybe the kernel?) can
         * recognize.
         * Apparently, a SA_RESTORER is implicitly set by the kernel, when
         * using non-realtime signals.
         *
         * TODO: Test whether ARM needs a restorer
         */
        if (!(a.sa_flags & SA_RESTORER)) {
          a.sa_flags   |= SA_RESTORER;
          a.sa_restorer = (a.sa_flags & SA_SIGINFO)
                          ? LSS_NAME(restore_rt)() : LSS_NAME(restore)();
        }
        #endif
      }
      rc = LSS_NAME(rt_sigaction)(signum, act ? &a : act, oldact,
                                  (KERNEL_NSIG+7)/8);
      if (rc < 0 && LSS_ERRNO == ENOSYS) {
        struct kernel_old_sigaction oa, ooa, *ptr_a = &oa, *ptr_oa = &ooa;
        if (!act) {
          ptr_a            = NULL;
        } else {
          oa.sa_handler_   = act->sa_handler_;
          memcpy(&oa.sa_mask, &act->sa_mask, sizeof(oa.sa_mask));
          #ifndef __mips__
          oa.sa_restorer   = act->sa_restorer;
          #endif
          oa.sa_flags      = act->sa_flags;
        }
        if (!oldact) {
          ptr_oa           = NULL;
        }
        LSS_ERRNO = old_errno;
        rc = LSS_NAME(_sigaction)(signum, ptr_a, ptr_oa);
        if (rc == 0 && oldact) {
          if (act) {
            memcpy(oldact, act, sizeof(*act));
          } else {
            memset(oldact, 0, sizeof(*oldact));
          }
          oldact->sa_handler_    = ptr_oa->sa_handler_;
          oldact->sa_flags       = ptr_oa->sa_flags;
          memcpy(&oldact->sa_mask, &ptr_oa->sa_mask, sizeof(ptr_oa->sa_mask));
          #ifndef __mips__
          oldact->sa_restorer    = ptr_oa->sa_restorer;
          #endif
        }
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(sigpending)(struct kernel_sigset_t *set) {
      int old_errno = LSS_ERRNO;
      int rc = LSS_NAME(rt_sigpending)(set, (KERNEL_NSIG+7)/8);
      if (rc < 0 && LSS_ERRNO == ENOSYS) {
        LSS_ERRNO = old_errno;
        LSS_NAME(sigemptyset)(set);
        rc = LSS_NAME(_sigpending)(&set->sig[0]);
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(sigprocmask)(int how,
                                         const struct kernel_sigset_t *set,
                                         struct kernel_sigset_t *oldset) {
      int olderrno = LSS_ERRNO;
      int rc = LSS_NAME(rt_sigprocmask)(how, set, oldset, (KERNEL_NSIG+7)/8);
      if (rc < 0 && LSS_ERRNO == ENOSYS) {
        LSS_ERRNO = olderrno;
        if (oldset) {
          LSS_NAME(sigemptyset)(oldset);
        }
        rc = LSS_NAME(_sigprocmask)(how,
                                    set ? &set->sig[0] : NULL,
                                    oldset ? &oldset->sig[0] : NULL);
      }
      return rc;
    }

    LSS_INLINE int LSS_NAME(sigsuspend)(const struct kernel_sigset_t *set) {
      int olderrno = LSS_ERRNO;
      int rc = LSS_NAME(rt_sigsuspend)(set, (KERNEL_NSIG+7)/8);
      if (rc < 0 && LSS_ERRNO == ENOSYS) {
        LSS_ERRNO = olderrno;
        rc = LSS_NAME(_sigsuspend)(
        #ifndef __PPC__
                                   set, 0,
        #endif
                                   set->sig[0]);
      }
      return rc;
    }
  #endif
  #if defined(__PPC__)
    #undef LSS_SC_LOADARGS_0
    #define LSS_SC_LOADARGS_0(dummy...)
    #undef LSS_SC_LOADARGS_1
    #define LSS_SC_LOADARGS_1(arg1)                                           \
        __sc_4  = (unsigned long) (arg1)
    #undef LSS_SC_LOADARGS_2
    #define LSS_SC_LOADARGS_2(arg1, arg2)                                     \
        LSS_SC_LOADARGS_1(arg1);                                              \
        __sc_5  = (unsigned long) (arg2)
    #undef LSS_SC_LOADARGS_3
    #define LSS_SC_LOADARGS_3(arg1, arg2, arg3)                               \
        LSS_SC_LOADARGS_2(arg1, arg2);                                        \
        __sc_6  = (unsigned long) (arg3)
    #undef LSS_SC_LOADARGS_4
    #define LSS_SC_LOADARGS_4(arg1, arg2, arg3, arg4)                         \
        LSS_SC_LOADARGS_3(arg1, arg2, arg3);                                  \
        __sc_7  = (unsigned long) (arg4)
    #undef LSS_SC_LOADARGS_5
    #define LSS_SC_LOADARGS_5(arg1, arg2, arg3, arg4, arg5)                   \
        LSS_SC_LOADARGS_4(arg1, arg2, arg3, arg4);                            \
        __sc_8  = (unsigned long) (arg5)
    #undef LSS_SC_BODY
    #define LSS_SC_BODY(nr, type, opt, args...)                               \
        long __sc_ret, __sc_err;                                              \
        {                                                                     \
          register unsigned long __sc_0 __asm__ ("r0") = __NR_socketcall;     \
          register unsigned long __sc_3 __asm__ ("r3") = opt;                 \
          register unsigned long __sc_4 __asm__ ("r4");                       \
          register unsigned long __sc_5 __asm__ ("r5");                       \
          register unsigned long __sc_6 __asm__ ("r6");                       \
          register unsigned long __sc_7 __asm__ ("r7");                       \
          register unsigned long __sc_8 __asm__ ("r8");                       \
          LSS_SC_LOADARGS_##nr(args);                                         \
          __asm__ __volatile__                                                \
              ("stwu 1, -48(1)\n\t"                                           \
               "stw 4, 20(1)\n\t"                                             \
               "stw 5, 24(1)\n\t"                                             \
               "stw 6, 28(1)\n\t"                                             \
               "stw 7, 32(1)\n\t"                                             \
               "stw 8, 36(1)\n\t"                                             \
               "addi 4, 1, 20\n\t"                                            \
               "sc\n\t"                                                       \
               "mfcr %0"                                                      \
                 : "=&r" (__sc_0),                                            \
                   "=&r" (__sc_3), "=&r" (__sc_4),                            \
                   "=&r" (__sc_5), "=&r" (__sc_6),                            \
                   "=&r" (__sc_7), "=&r" (__sc_8)                             \
                 : LSS_ASMINPUT_##nr                                          \
                 : "cr0", "ctr", "memory");                                   \
          __sc_ret = __sc_3;                                                  \
          __sc_err = __sc_0;                                                  \
        }                                                                     \
        LSS_RETURN(type, __sc_ret, __sc_err)

    LSS_INLINE ssize_t LSS_NAME(recvmsg)(int s,struct kernel_msghdr *msg,
                                         int flags){
      LSS_SC_BODY(3, ssize_t, 17, s, msg, flags);
    }

    LSS_INLINE ssize_t LSS_NAME(sendmsg)(int s,
                                         const struct kernel_msghdr *msg,
                                         int flags) {
      LSS_SC_BODY(3, ssize_t, 16, s, msg, flags);
    }

    // TODO(csilvers): why is this ifdef'ed out?
#if 0
    LSS_INLINE ssize_t LSS_NAME(sendto)(int s, const void *buf, size_t len,
                                        int flags,
                                        const struct kernel_sockaddr *to,
                                        unsigned int tolen) {
      LSS_BODY(6, ssize_t, 11, s, buf, len, flags, to, tolen);
    }
#endif

    LSS_INLINE int LSS_NAME(shutdown)(int s, int how) {
      LSS_SC_BODY(2, int, 13, s, how);
    }

    LSS_INLINE int LSS_NAME(socket)(int domain, int type, int protocol) {
      LSS_SC_BODY(3, int, 1, domain, type, protocol);
    }

    LSS_INLINE int LSS_NAME(socketpair)(int d, int type, int protocol,
                                        int sv[2]) {
      LSS_SC_BODY(4, int, 8, d, type, protocol, sv);
    }
  #endif
  #if defined(__ARM_EABI__)
    LSS_INLINE _syscall3(ssize_t, recvmsg, int, s, struct kernel_msghdr*, msg,
                         int, flags)
    LSS_INLINE _syscall3(ssize_t, sendmsg, int, s, const struct kernel_msghdr*,
                         msg, int, flags)
    LSS_INLINE _syscall6(ssize_t, sendto, int, s, const void*, buf, size_t,len,
                         int, flags, const struct kernel_sockaddr*, to,
                         unsigned int, tolen)
    LSS_INLINE _syscall2(int, shutdown, int, s, int, how)
    LSS_INLINE _syscall3(int, socket, int, domain, int, type, int, protocol)
    LSS_INLINE _syscall4(int, socketpair, int, d, int, type, int, protocol,
                         int*, sv)
  #endif
  #if defined(__i386__) || defined(__ARM_ARCH_3__) ||                         \
      (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32)
    #define __NR__socketcall  __NR_socketcall
    LSS_INLINE _syscall2(int,      _socketcall,    int,   c,
                         va_list,                  a)
    LSS_INLINE int LSS_NAME(socketcall)(int op, ...) {
      int rc;
      va_list ap;
      va_start(ap, op);
      rc = LSS_NAME(_socketcall)(op, ap);
      va_end(ap);
      return rc;
    }

    LSS_INLINE ssize_t LSS_NAME(recvmsg)(int s,struct kernel_msghdr *msg,
                                         int flags){
      return (ssize_t)LSS_NAME(socketcall)(17, s, msg, flags);
    }

    LSS_INLINE ssize_t LSS_NAME(sendmsg)(int s,
                                         const struct kernel_msghdr *msg,
                                         int flags) {
      return (ssize_t)LSS_NAME(socketcall)(16, s, msg, flags);
    }

    LSS_INLINE ssize_t LSS_NAME(sendto)(int s, const void *buf, size_t len,
                                        int flags,
                                        const struct kernel_sockaddr *to,
                                        unsigned int tolen) {
      return (ssize_t)LSS_NAME(socketcall)(11, s, buf, len, flags, to, tolen);
    }

    LSS_INLINE int LSS_NAME(shutdown)(int s, int how) {
      return LSS_NAME(socketcall)(13, s, how);
    }

    LSS_INLINE int LSS_NAME(socket)(int domain, int type, int protocol) {
      return LSS_NAME(socketcall)(1, domain, type, protocol);
    }

    LSS_INLINE int LSS_NAME(socketpair)(int d, int type, int protocol,
                                        int sv[2]) {
      return LSS_NAME(socketcall)(8, d, type, protocol, sv);
    }
  #endif
  #if defined(__i386__) || defined(__PPC__)
    LSS_INLINE _syscall4(int,   fstatat64,        int,   d,
                         const char *,      p,
                         struct kernel_stat64 *,   b,    int,   f)
  #endif
  #if defined(__i386__) || defined(__PPC__) ||                                \
     (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32)
    LSS_INLINE _syscall3(pid_t, waitpid,          pid_t, p,
                         int*,              s,    int,   o)
  #endif
  #if defined(__mips__)
    /* sys_pipe() on MIPS has non-standard calling conventions, as it returns
     * both file handles through CPU registers.
     */
    LSS_INLINE int LSS_NAME(pipe)(int *p) {
      register unsigned long __v0 __asm__("$2") = __NR_pipe;
      register unsigned long __v1 __asm__("$3");
      register unsigned long __r7 __asm__("$7");
      __asm__ __volatile__ ("syscall\n"
                            : "+r"(__v0), "=r"(__v1), "=r" (__r7)
                            : "0"(__v0)
                            : "$8", "$9", "$10", "$11", "$12",
                              "$13", "$14", "$15", "$24", "$25", "memory");
      if (__r7) {
        unsigned long __errnovalue = __v0;
        LSS_ERRNO = __errnovalue;
        return -1;
      } else {
        p[0] = __v0;
        p[1] = __v1;
        return 0;
      }
    }
  #else
    LSS_INLINE _syscall1(int,     pipe,           int *, p)
  #endif
  /* TODO(csilvers): see if ppc can/should support this as well              */
  #if defined(__i386__) || defined(__ARM_ARCH_3__) ||                         \
      defined(__ARM_EABI__) ||                                             \
     (defined(__mips__) && _MIPS_SIM != _MIPS_SIM_ABI64)
    #define __NR__statfs64  __NR_statfs64
    #define __NR__fstatfs64 __NR_fstatfs64
    LSS_INLINE _syscall3(int, _statfs64,     const char*, p,
                         size_t, s,struct kernel_statfs64*, b)
    LSS_INLINE _syscall3(int, _fstatfs64,          int,   f,
                         size_t, s,struct kernel_statfs64*, b)
    LSS_INLINE int LSS_NAME(statfs64)(const char *p,
                                     struct kernel_statfs64 *b) {
      return LSS_NAME(_statfs64)(p, sizeof(*b), b);
    }
    LSS_INLINE int LSS_NAME(fstatfs64)(int f,struct kernel_statfs64 *b) {
      return LSS_NAME(_fstatfs64)(f, sizeof(*b), b);
    }
  #endif

  LSS_INLINE int LSS_NAME(execv)(const char *path, const char *const argv[]) {
    extern char **environ;
    return LSS_NAME(execve)(path, argv, (const char *const *)environ);
  }

  LSS_INLINE pid_t LSS_NAME(gettid)() {
    pid_t tid = LSS_NAME(_gettid)();
    if (tid != -1) {
      return tid;
    }
    return LSS_NAME(getpid)();
  }

  LSS_INLINE void *LSS_NAME(mremap)(void *old_address, size_t old_size,
                                    size_t new_size, int flags, ...) {
    va_list ap;
    void *new_address, *rc;
    va_start(ap, flags);
    new_address = va_arg(ap, void *);
    rc = LSS_NAME(_mremap)(old_address, old_size, new_size,
                           flags, new_address);
    va_end(ap);
    return rc;
  }

  LSS_INLINE int LSS_NAME(ptrace_detach)(pid_t pid) {
    /* PTRACE_DETACH can sometimes forget to wake up the tracee and it
     * then sends job control signals to the real parent, rather than to
     * the tracer. We reduce the risk of this happening by starting a
     * whole new time slice, and then quickly sending a SIGCONT signal
     * right after detaching from the tracee.
     *
     * We use tkill to ensure that we only issue a wakeup for the thread being
     * detached.  Large multi threaded apps can take a long time in the kernel
     * processing SIGCONT.
     */
    int rc, err;
    LSS_NAME(sched_yield)();
    rc = LSS_NAME(ptrace)(PTRACE_DETACH, pid, (void *)0, (void *)0);
    err = LSS_ERRNO;
    LSS_NAME(tkill)(pid, SIGCONT);
    /* Old systems don't have tkill */
    if (LSS_ERRNO == ENOSYS)
      LSS_NAME(kill)(pid, SIGCONT);
    LSS_ERRNO = err;
    return rc;
  }

  LSS_INLINE int LSS_NAME(raise)(int sig) {
    return LSS_NAME(kill)(LSS_NAME(getpid)(), sig);
  }

  LSS_INLINE int LSS_NAME(setpgrp)() {
    return LSS_NAME(setpgid)(0, 0);
  }

  LSS_INLINE int LSS_NAME(sysconf)(int name) {
    extern int __getpagesize(void);
    switch (name) {
      case _SC_OPEN_MAX: {
        struct kernel_rlimit limit;
#if defined(__ARM_EABI__)
        return LSS_NAME(ugetrlimit)(RLIMIT_NOFILE, &limit) < 0
            ? 8192 : limit.rlim_cur;
#else
        return LSS_NAME(getrlimit)(RLIMIT_NOFILE, &limit) < 0
            ? 8192 : limit.rlim_cur;
#endif
      }
      case _SC_PAGESIZE:
        return __getpagesize();
      default:
        LSS_ERRNO = ENOSYS;
        return -1;
    }
  }
  #if defined(__x86_64__) ||                                                  \
     (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI64)
    LSS_INLINE _syscall4(ssize_t, pread64,        int,         f,
                         void *,         b, size_t,   c,
                         loff_t,         o)
    LSS_INLINE _syscall4(ssize_t, pwrite64,       int,         f,
                         const void *,   b, size_t,   c,
                         loff_t,         o)
    LSS_INLINE _syscall3(int,     readahead,      int,         f,
                         loff_t,         o, unsigned, c)
  #else
    #define __NR__pread64   __NR_pread64
    #define __NR__pwrite64  __NR_pwrite64
    #define __NR__readahead __NR_readahead
    #if defined(__ARM_EABI__)
      /* On ARM, a 64-bit parameter has to be in an even-odd register pair.
       * Hence these calls ignore their fourth argument (r3) so that their
       * fifth and sixth make such a pair (r4,r5).
       */
      #define LSS_LLARG_PAD 0,
      LSS_INLINE _syscall6(ssize_t, _pread64,        int,         f,
                           void *,         b, size_t, c,
                           unsigned, skip, unsigned, o1, unsigned, o2)
      LSS_INLINE _syscall6(ssize_t, _pwrite64,       int,         f,
                           const void *,   b, size_t, c,
                           unsigned, skip, unsigned, o1, unsigned, o2)
      LSS_INLINE _syscall5(int, _readahead,          int,         f,
                           unsigned,     skip,
                           unsigned,       o1, unsigned, o2, size_t, c)
    #else
      #define LSS_LLARG_PAD
      LSS_INLINE _syscall5(ssize_t, _pread64,        int,         f,
                           void *,         b, size_t, c, unsigned, o1,
                           unsigned, o2)
      LSS_INLINE _syscall5(ssize_t, _pwrite64,       int,         f,
                           const void *,   b, size_t, c, unsigned, o1,
                           long, o2)
      LSS_INLINE _syscall4(int, _readahead,          int,         f,
                           unsigned,       o1, unsigned, o2, size_t, c)
    #endif
    /* We force 64bit-wide parameters onto the stack, then access each
     * 32-bit component individually. This guarantees that we build the
     * correct parameters independent of the native byte-order of the
     * underlying architecture.
     */
    LSS_INLINE ssize_t LSS_NAME(pread64)(int fd, void *buf, size_t count,
                                         loff_t off) {
      union { loff_t off; unsigned arg[2]; } o = { off };
      return LSS_NAME(_pread64)(fd, buf, count,
                                LSS_LLARG_PAD o.arg[0], o.arg[1]);
    }
    LSS_INLINE ssize_t LSS_NAME(pwrite64)(int fd, const void *buf,
                                          size_t count, loff_t off) {
      union { loff_t off; unsigned arg[2]; } o = { off };
      return LSS_NAME(_pwrite64)(fd, buf, count,
                                 LSS_LLARG_PAD o.arg[0], o.arg[1]);
    }
    LSS_INLINE int LSS_NAME(readahead)(int fd, loff_t off, int len) {
      union { loff_t off; unsigned arg[2]; } o = { off };
      return LSS_NAME(_readahead)(fd, LSS_LLARG_PAD o.arg[0], o.arg[1], len);
    }
  #endif
#endif

#ifdef __ANDROID__
  /* These restore the original values of these macros saved by the
   * corresponding #pragma push_macro near the top of this file. */
# pragma pop_macro("stat64")
# pragma pop_macro("fstat64")
# pragma pop_macro("lstat64")
#endif

#if defined(__cplusplus) && !defined(SYS_CPLUSPLUS)
}
#endif

#endif
#endif