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
|
/* Syscall definitions, Linux PowerPC generic version.
Copyright (C) 2019-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/powerpc/sysdep.h>
#include <tls.h>
/* Define __set_errno() for INLINE_SYSCALL macro below. */
#include <errno.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
of the kernel. But these symbols do not follow the SYS_* syntax
so we have to redefine the `SYS_ify' macro here. */
#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name
/* Define a macro which expands inline into the wrapper code for a system
call. This use is for internal calls that do not need to handle errors
normally. It will never touch errno. This returns just what the kernel
gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set)
the negation of the return value in the kernel gets reverted. */
#define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, type, nr, args...) \
({ \
register void *r0 __asm__ ("r0"); \
register long int r3 __asm__ ("r3"); \
register long int r4 __asm__ ("r4"); \
register long int r5 __asm__ ("r5"); \
register long int r6 __asm__ ("r6"); \
register long int r7 __asm__ ("r7"); \
register long int r8 __asm__ ("r8"); \
register type rval __asm__ ("r3"); \
LOADARGS_##nr (funcptr, args); \
__asm__ __volatile__ \
("mtctr %0\n\t" \
"bctrl\n\t" \
"mfcr %0\n\t" \
"0:" \
: "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), \
"+r" (r7), "+r" (r8) \
: : "r9", "r10", "r11", "r12", \
"cr0", "cr1", "cr5", "cr6", "cr7", \
"xer", "lr", "ctr", "memory"); \
__asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \
(long int) r0 & (1 << 28) ? -rval : rval; \
})
#define INTERNAL_VSYSCALL_CALL(funcptr, nr, args...) \
INTERNAL_VSYSCALL_CALL_TYPE(funcptr, long int, nr, args)
#define DECLARE_REGS \
register long int r0 __asm__ ("r0"); \
register long int r3 __asm__ ("r3"); \
register long int r4 __asm__ ("r4"); \
register long int r5 __asm__ ("r5"); \
register long int r6 __asm__ ("r6"); \
register long int r7 __asm__ ("r7"); \
register long int r8 __asm__ ("r8");
#define SYSCALL_SCV(nr) \
({ \
__asm__ __volatile__ \
(".machine \"push\"\n\t" \
".machine \"power9\"\n\t" \
"scv 0\n\t" \
".machine \"pop\"\n\t" \
"0:" \
: "=&r" (r0), \
"=&r" (r3), "=&r" (r4), "=&r" (r5), \
"=&r" (r6), "=&r" (r7), "=&r" (r8) \
: ASM_INPUT_##nr \
: "r9", "r10", "r11", "r12", \
"cr0", "cr1", "cr5", "cr6", "cr7", \
"xer", "lr", "ctr", "memory"); \
r3; \
})
#define SYSCALL_SC(nr) \
({ \
__asm__ __volatile__ \
("sc\n\t" \
"mfcr %0\n\t" \
"0:" \
: "=&r" (r0), \
"=&r" (r3), "=&r" (r4), "=&r" (r5), \
"=&r" (r6), "=&r" (r7), "=&r" (r8) \
: ASM_INPUT_##nr \
: "r9", "r10", "r11", "r12", \
"xer", "cr0", "ctr", "memory"); \
r0 & (1 << 28) ? -r3 : r3; \
})
/* This will only be non-empty for 64-bit systems, see below. */
#define TRY_SYSCALL_SCV(nr)
#if defined(__PPC64__) || defined(__powerpc64__)
# define SYSCALL_ARG_SIZE 8
/* For the static case, unlike the dynamic loader, there is no compile-time way
to check if we are inside startup code. So we need to check if the thread
pointer has already been setup before trying to access the TLS. */
# ifndef SHARED
# define CHECK_THREAD_POINTER (__thread_register != 0)
# else
# define CHECK_THREAD_POINTER (1)
# endif
/* When inside the dynamic loader, the thread pointer may not have been
initialized yet, so don't check for scv support in that case. */
# if defined(USE_PPC_SCV) && !IS_IN(rtld)
# undef TRY_SYSCALL_SCV
# define TRY_SYSCALL_SCV(nr) \
CHECK_THREAD_POINTER && THREAD_GET_HWCAP() & PPC_FEATURE2_SCV ? \
SYSCALL_SCV(nr) :
# endif
#else
# define SYSCALL_ARG_SIZE 4
#endif
# define INTERNAL_SYSCALL_NCS(name, nr, args...) \
({ \
DECLARE_REGS; \
LOADARGS_##nr (name, ##args); \
TRY_SYSCALL_SCV(nr) \
SYSCALL_SC(nr); \
})
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, nr, args...) \
INTERNAL_SYSCALL_NCS (__NR_##name, nr, args)
#define LOADARGS_0(name, dummy) \
r0 = name
#define LOADARGS_1(name, __arg1) \
long int _arg1 = (long int) (__arg1); \
LOADARGS_0(name, 0); \
extern void __illegally_sized_syscall_arg1 (void); \
if (__builtin_classify_type (__arg1) != 5 \
&& sizeof (__arg1) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg1 (); \
r3 = _arg1
#define LOADARGS_2(name, __arg1, __arg2) \
long int _arg2 = (long int) (__arg2); \
LOADARGS_1(name, __arg1); \
extern void __illegally_sized_syscall_arg2 (void); \
if (__builtin_classify_type (__arg2) != 5 \
&& sizeof (__arg2) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg2 (); \
r4 = _arg2
#define LOADARGS_3(name, __arg1, __arg2, __arg3) \
long int _arg3 = (long int) (__arg3); \
LOADARGS_2(name, __arg1, __arg2); \
extern void __illegally_sized_syscall_arg3 (void); \
if (__builtin_classify_type (__arg3) != 5 \
&& sizeof (__arg3) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg3 (); \
r5 = _arg3
#define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
long int _arg4 = (long int) (__arg4); \
LOADARGS_3(name, __arg1, __arg2, __arg3); \
extern void __illegally_sized_syscall_arg4 (void); \
if (__builtin_classify_type (__arg4) != 5 \
&& sizeof (__arg4) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg4 (); \
r6 = _arg4
#define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
long int _arg5 = (long int) (__arg5); \
LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
extern void __illegally_sized_syscall_arg5 (void); \
if (__builtin_classify_type (__arg5) != 5 \
&& sizeof (__arg5) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg5 (); \
r7 = _arg5
#define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
long int _arg6 = (long int) (__arg6); \
LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
extern void __illegally_sized_syscall_arg6 (void); \
if (__builtin_classify_type (__arg6) != 5 \
&& sizeof (__arg6) > SYSCALL_ARG_SIZE) \
__illegally_sized_syscall_arg6 (); \
r8 = _arg6
#define ASM_INPUT_0 "0" (r0)
#define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
#define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
#define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
#define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
/* Pointer mangling support. */
#if IS_IN (rtld)
/* We cannot use the thread descriptor because in ld.so we use setjmp
earlier than the descriptor is initialized. */
#else
# ifdef __ASSEMBLER__
# if defined(__PPC64__) || defined(__powerpc64__)
# define LOAD ld
# define TPREG r13
# else
# define LOAD lwz
# define TPREG r2
# endif
# define PTR_MANGLE(reg, tmpreg) \
LOAD tmpreg,POINTER_GUARD(TPREG); \
xor reg,tmpreg,reg
# define PTR_MANGLE2(reg, tmpreg) \
xor reg,tmpreg,reg
# define PTR_MANGLE3(destreg, reg, tmpreg) \
LOAD tmpreg,POINTER_GUARD(TPREG); \
xor destreg,tmpreg,reg
# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
# else
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#endif
/* List of system calls which are supported as vsyscalls. */
#define VDSO_NAME "LINUX_2.6.15"
#define VDSO_HASH 123718565
#if defined(__PPC64__) || defined(__powerpc64__)
#define HAVE_CLOCK_GETRES64_VSYSCALL "__kernel_clock_getres"
#define HAVE_CLOCK_GETTIME64_VSYSCALL "__kernel_clock_gettime"
#else
#define HAVE_CLOCK_GETRES_VSYSCALL "__kernel_clock_getres"
#define HAVE_CLOCK_GETTIME_VSYSCALL "__kernel_clock_gettime"
#endif
#define HAVE_GETCPU_VSYSCALL "__kernel_getcpu"
#define HAVE_TIME_VSYSCALL "__kernel_time"
#define HAVE_GETTIMEOFDAY_VSYSCALL "__kernel_gettimeofday"
#define HAVE_GET_TBFREQ "__kernel_get_tbfreq"
#endif /* _LINUX_POWERPC_SYSDEP_H */
|
