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
|
; RUN: rm -rf %t && split-file %s %t && cd %t
;--- err1.ll
; RUN: not --crash llc < err1.ll -mtriple aarch64-elf -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR1 %s
; RUN: not --crash llc < err1.ll -mtriple arm64-apple-ios -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR1 %s
@g = external global i32
define ptr @foo() {
; ERR1: LLVM ERROR: key in ptrauth global out of range [0, 3]
ret ptr ptrauth (ptr @g, i32 4)
}
;--- err2.ll
; RUN: not --crash llc < err2.ll -mtriple aarch64-elf -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR2 %s
; RUN: not --crash llc < err2.ll -mtriple arm64-apple-ios -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR2 %s
@g = external global i32
define ptr @foo() {
; ERR2: LLVM ERROR: constant discriminator in ptrauth global out of range [0, 0xffff]
ret ptr ptrauth (ptr @g, i32 2, i64 65536)
}
;--- err3.ll
; RUN: not --crash llc < err3.ll -mtriple aarch64-elf -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR3 %s
; RUN: not --crash llc < err3.ll -mtriple arm64-apple-ios -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR3 %s
@g_weak = extern_weak global i32
define ptr @foo() {
; ERR3: LLVM ERROR: unsupported non-zero offset in weak ptrauth global reference
ret ptr ptrauth (ptr getelementptr (i8, ptr @g_weak, i64 16), i32 2, i64 42)
}
;--- err4.ll
; RUN: not --crash llc < err4.ll -mtriple aarch64-elf -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR4 %s
; RUN: not --crash llc < err4.ll -mtriple arm64-apple-ios -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR4 %s
@g_weak = extern_weak global i32
@g_weak.ref.da.42.addr = dso_local constant ptr ptrauth (ptr @g_weak, i32 2, i64 42, ptr @g_weak.ref.da.42.addr)
define ptr @foo() {
; ERR4: LLVM ERROR: unsupported weak addr-div ptrauth global
ret ptr ptrauth (ptr @g_weak, i32 0, i64 42, ptr @g_weak.ref.da.42.addr)
}
;--- err5.ll
; RUN: not --crash llc < err5.ll -mtriple aarch64-windows -mattr=+pauth \
; RUN: -global-isel=0 -verify-machineinstrs 2>&1 | FileCheck --check-prefix=ERR5 %s
@g = external global i32
define ptr @foo() {
; ERR5: LLVM ERROR: ptrauth global lowering only supported on MachO/ELF
ret ptr ptrauth (ptr @g, i32 0)
}
;--- ok.ll
; RUN: llc < ok.ll -mtriple aarch64-elf -mattr=+pauth -global-isel=0 \
; RUN: -verify-machineinstrs | FileCheck %s --check-prefix=ELF
; RUN: llc < ok.ll -mtriple aarch64-elf -mattr=+pauth -global-isel=0 \
; RUN: -verify-machineinstrs -filetype=obj
; RUN: llc < ok.ll -mtriple arm64-apple-ios -mattr=+pauth -global-isel=0 \
; RUN: -verify-machineinstrs | FileCheck %s --check-prefix=MACHO
; RUN: llc < ok.ll -mtriple arm64-apple-ios -mattr=+pauth -global-isel=0 \
; RUN: -verify-machineinstrs -filetype=obj
@g = external global i32
@g_weak = extern_weak global i32
@g_strong_def = dso_local constant i32 42
define ptr @test_global_zero_disc() {
; ELF-LABEL: test_global_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: paciza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: paciza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g, i32 0)
}
define ptr @test_global_offset_zero_disc() {
; ELF-LABEL: test_global_offset_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: add x16, x16, #16
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_offset_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: add x16, x16, #16
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr getelementptr (i8, ptr @g, i64 16), i32 2)
}
define ptr @test_global_neg_offset_zero_disc() {
; ELF-LABEL: test_global_neg_offset_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: sub x16, x16, #576
; ELF-NEXT: sub x16, x16, #30, lsl #12
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_neg_offset_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: sub x16, x16, #576
; MACHO-NEXT: sub x16, x16, #30, lsl #12
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr getelementptr (i8, ptr @g, i64 -123456), i32 2)
}
define ptr @test_global_big_offset_zero_disc() {
; ELF-LABEL: test_global_big_offset_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: mov x17, #1
; ELF-NEXT: movk x17, #32769, lsl #16
; ELF-NEXT: add x16, x16, x17
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_big_offset_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: mov x17, #1
; MACHO-NEXT: movk x17, #32769, lsl #16
; MACHO-NEXT: add x16, x16, x17
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr getelementptr (i8, ptr @g, i64 add (i64 2147483648, i64 65537)), i32 2)
}
define ptr @test_global_big_neg_offset_zero_disc() {
; ELF-LABEL: test_global_big_neg_offset_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: mov x17, #-52501
; ELF-NEXT: movk x17, #63652, lsl #16
; ELF-NEXT: add x16, x16, x17
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_big_neg_offset_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: mov x17, #-52501
; MACHO-NEXT: movk x17, #63652, lsl #16
; MACHO-NEXT: add x16, x16, x17
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr getelementptr (i8, ptr @g, i64 -123456789), i32 2)
}
define ptr @test_global_huge_neg_offset_zero_disc() {
; ELF-LABEL: test_global_huge_neg_offset_zero_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: mov x17, #-65536
; ELF-NEXT: movk x17, #0, lsl #16
; ELF-NEXT: movk x17, #0, lsl #32
; ELF-NEXT: movk x17, #32768, lsl #48
; ELF-NEXT: add x16, x16, x17
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_huge_neg_offset_zero_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: mov x17, #-65536
; MACHO-NEXT: movk x17, #0, lsl #16
; MACHO-NEXT: movk x17, #0, lsl #32
; MACHO-NEXT: movk x17, #32768, lsl #48
; MACHO-NEXT: add x16, x16, x17
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr getelementptr (i8, ptr @g, i64 -9223372036854775808), i32 2)
}
define ptr @test_global_disc() {
; ELF-LABEL: test_global_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: mov x17, #42 // =0x2a
; ELF-NEXT: pacia x16, x17
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: mov x17, #42 ; =0x2a
; MACHO-NEXT: pacia x16, x17
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g, i32 0, i64 42)
}
@g.ref.da.42.addr = dso_local constant ptr ptrauth (ptr @g, i32 2, i64 42, ptr @g.ref.da.42.addr)
define ptr @test_global_addr_disc() {
; ELF-LABEL: test_global_addr_disc:
; ELF: // %bb.0:
; ELF-NEXT: adrp x8, g.ref.da.42.addr
; ELF-NEXT: add x8, x8, :lo12:g.ref.da.42.addr
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: mov x17, x8
; ELF-NEXT: movk x17, #42, lsl #48
; ELF-NEXT: pacda x16, x17
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_addr_disc:
; MACHO: ; %bb.0:
; MACHO-NEXT: Lloh{{.*}}:
; MACHO-NEXT: adrp x8, _g.ref.da.42.addr@PAGE
; MACHO-NEXT: Lloh{{.*}}:
; MACHO-NEXT: add x8, x8, _g.ref.da.42.addr@PAGEOFF
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: mov x17, x8
; MACHO-NEXT: movk x17, #42, lsl #48
; MACHO-NEXT: pacda x16, x17
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g, i32 2, i64 42, ptr @g.ref.da.42.addr)
}
define ptr @test_global_process_specific() {
; ELF-LABEL: test_global_process_specific:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, :got:g
; ELF-NEXT: ldr x16, [x16, :got_lo12:g]
; ELF-NEXT: pacizb x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_process_specific:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g@GOTPAGE
; MACHO-NEXT: ldr x16, [x16, _g@GOTPAGEOFF]
; MACHO-NEXT: pacizb x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g, i32 1)
}
; Non-external symbols don't need to be accessed through the GOT.
define ptr @test_global_strong_def() {
; ELF-LABEL: test_global_strong_def:
; ELF: // %bb.0:
; ELF-NEXT: adrp x16, g_strong_def
; ELF-NEXT: add x16, x16, :lo12:g_strong_def
; ELF-NEXT: pacdza x16
; ELF-NEXT: mov x0, x16
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_strong_def:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x16, _g_strong_def@PAGE
; MACHO-NEXT: add x16, x16, _g_strong_def@PAGEOFF
; MACHO-NEXT: pacdza x16
; MACHO-NEXT: mov x0, x16
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g_strong_def, i32 2)
}
; weak symbols can't be assumed to be non-nil. Use $auth_ptr$ stub slot always.
; The alternative is to emit a null-check here, but that'd be redundant with
; whatever null-check follows in user code.
define ptr @test_global_weak() {
; ELF-LABEL: test_global_weak:
; ELF: // %bb.0:
; ELF-NEXT: adrp x0, g_weak$auth_ptr$ia$42
; ELF-NEXT: ldr x0, [x0, :lo12:g_weak$auth_ptr$ia$42]
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_weak:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x0, l_g_weak$auth_ptr$ia$42@PAGE
; MACHO-NEXT: ldr x0, [x0, l_g_weak$auth_ptr$ia$42@PAGEOFF]
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g_weak, i32 0, i64 42)
}
; Test another weak symbol to check that stubs are emitted in a stable order.
@g_weak_2 = extern_weak global i32
define ptr @test_global_weak_2() {
; ELF-LABEL: test_global_weak_2:
; ELF: // %bb.0:
; ELF-NEXT: adrp x0, g_weak_2$auth_ptr$ia$42
; ELF-NEXT: ldr x0, [x0, :lo12:g_weak_2$auth_ptr$ia$42]
; ELF-NEXT: ret
; MACHO-LABEL: _test_global_weak_2:
; MACHO: ; %bb.0:
; MACHO-NEXT: adrp x0, l_g_weak_2$auth_ptr$ia$42@PAGE
; MACHO-NEXT: ldr x0, [x0, l_g_weak_2$auth_ptr$ia$42@PAGEOFF]
; MACHO-NEXT: ret
ret ptr ptrauth (ptr @g_weak_2, i32 0, i64 42)
}
; ELF-LABEL: g_weak$auth_ptr$ia$42:
; ELF-NEXT: .xword g_weak@AUTH(ia,42)
; ELF-LABEL: g_weak_2$auth_ptr$ia$42:
; ELF-NEXT: .xword g_weak_2@AUTH(ia,42)
; MACHO-LABEL: l_g_weak$auth_ptr$ia$42:
; MACHO-NEXT: .quad _g_weak@AUTH(ia,42)
; MACHO-LABEL: l_g_weak_2$auth_ptr$ia$42:
; MACHO-NEXT: .quad _g_weak_2@AUTH(ia,42)
|
