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
|
/* Assembly macros for C-SKY.
Copyright (C) 2018-2020 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
<https://www.gnu.org/licenses/>. */
#ifndef _LINUX_CSKY_SYSDEP_H
#define _LINUX_CSKY_SYSDEP_H 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/csky/sysdep.h>
/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */
#include <dl-sysdep.h>
#include <tls.h>
/* In order to get __set_errno() definition in INLINE_SYSCALL. */
#ifndef __ASSEMBLER__
# include <errno.h>
#endif
#undef SYS_ify
#define SYS_ify(syscall_name) (__NR_##syscall_name)
#ifdef __ASSEMBLER__
/* Linux uses a negative return value to indicate syscall errors,
unlike most Unices, which use the condition codes' carry flag.
Since version 2.1 the return value of a system call might be
negative even if the call succeeded. E.g., the `lseek' system call
might return a large offset. Therefore we must not anymore test
for < 0, but test for a real error by making sure the value in R0
is a real error number. Linus said he will make sure the no syscall
returns a value in -1 .. -4095 as a valid result so we can safely
test with -4095. */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (syscall_name, args);
# define GETGB \
grs t0, .Lgetpc; \
.Lgetpc: \
lrw gb, .Lgetpc@GOTPC; \
addu gb, t0;
# if IS_IN (libc)
# ifdef __PIC__
# define PSEUDO_RET \
btsti a0, 31; \
bf 1f; \
subi sp, 8; \
st.w lr, (sp); \
st.w gb, (sp, 4); \
GETGB; \
lrw a2, SYSCALL_ERROR@PLT; \
add a2, gb; \
ld.w a2, (a2); \
jsr a2; \
ld.w lr, (sp); \
ld.w gb, (sp, 4); \
addi sp, 8; \
1: \
rts
# else
# define PSEUDO_RET \
btsti a0, 31; \
bf 1f; \
jmpi SYSCALL_ERROR; \
1: \
rts
# endif
# else
# ifdef __PIC__
# define PSEUDO_RET \
btsti a0, 31; \
bf 1f; \
subi sp, 8; \
st.w lr, (sp); \
st.w gb, (sp, 4); \
GETGB; \
bsr SYSCALL_ERROR; \
ld.w lr, (sp); \
ld.w gb, (sp, 4); \
addi sp, 8; \
1: \
rts
# else
# define PSEUDO_RET \
btsti a0, 31; \
bt SYSCALL_ERROR; \
rts
# endif
# endif
# undef ret
# define ret PSEUDO_RET
# undef PSEUDO_END
# define PSEUDO_END(name) \
.align 4; \
SYSCALL_ERROR_HANDLER; \
END (name)
# undef PSEUDO_NOERRNO
# define PSEUDO_NOERRNO(name, syscall_name, args) \
.text; \
ENTRY (name); \
DO_CALL (syscall_name, args)
# define PSEUDO_RET_NOERRNO rts
# undef ret_NOERRNO
# define ret_NOERRNO PSEUDO_RET_NOERRNO
# undef PSEUDO_END_NOERRNO
# define PSEUDO_END_NOERRNO(name) END (name)
/* The function has to return the error code. */
# undef PSEUDO_ERRVAL
# define PSEUDO_ERRVAL(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args); \
not a0; \
addi a0, 1
# undef PSEUDO_END_ERRVAL
# define PSEUDO_END_ERRVAL(name) END (name)
# define ret_ERRVAL rts
# if !IS_IN (libc)
# define SYSCALL_ERROR __local_syscall_error
# if RTLD_PRIVATE_ERRNO
# ifdef __PIC__
# define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
lrw a1, rtld_errno@PLT; \
addu a1, gb; \
ldw a1, (a1); \
rsubi a0, 0; \
stw a0, (a1); \
bmaski a0, 0; \
rts
# else /* __PIC__ */
# define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
lrw a1, rtld_errno; \
rsubi a0, 0; \
stw a0, (a1); \
bmaski a0, 0; \
rts
# endif /* __PIC__ */
# else /* !RTLD_PRIVATE_ERRNO */
# ifdef __PIC__
# define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
subi sp, 8; \
stw a0, (sp, 0); \
stw r15, (sp, 4); \
lrw a1, __errno_location@PLT; \
add a1, gb; \
ldw a1, (a1); \
jsr a1; \
ldw a1, (sp, 0); /* load errno*/ \
ldw r15, (sp, 4); \
addi sp, 8; \
movi a2, 0; \
rsub a1, a1, a2; \
stw a1, (a0); \
bmaski a0, 0; \
rts
# else
# define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
subi sp, 8; \
stw a0, (sp, 0); \
stw r15, (sp, 4); \
lrw a1, __errno_location; \
jsr a1; \
ldw a1, (sp, 0); /* load errno */ \
ldw r15, (sp, 4); \
addi sp, 8; \
movi a2, 0; \
rsub a1, a1, a2; \
stw a1, (a0); \
bmaski a0, 0; \
rts
# endif /* __PIC__ */
# endif/* RTLD_PRIVATE_ERROR */
# else
# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
# define SYSCALL_ERROR __syscall_error
# endif/* IS_IN (libc) */
/* define DO_CALL */
# undef DO_CALL
# define DO_CALL(syscall_name, args) \
DOARGS_##args; \
lrw r7, SYS_ify(syscall_name); \
trap 0; \
UNDOARGS_##args
# undef DOARGS_0
# define DOARGS_0 \
subi sp, 8; \
cfi_adjust_cfa_offset (8); \
stw r7, (sp, 0); \
cfi_rel_offset (r7, 0);
# undef DOARGS_1
# define DOARGS_1 DOARGS_0
# undef DOARGS_2
# define DOARGS_2 DOARGS_0
# undef DOARGS_3
# define DOARGS_3 DOARGS_0
# undef DOARGS_4
# define DOARGS_4 DOARGS_0
# undef DOARGS_5
# define DOARGS_5 \
subi sp, 8; \
cfi_adjust_cfa_offset (8); \
stw r7, (sp, 0); \
cfi_rel_offset (7, 0); \
stw r4, (sp, 4); \
cfi_rel_offset (4, 4); \
ldw r4, (sp, 8)
# undef DOARGS_6
# define DOARGS_6 \
subi sp, 16; \
cfi_adjust_cfa_offset (16); \
stw r7, (sp, 0); \
cfi_rel_offset (7, 0); \
stw r4, (sp, 4); \
cfi_rel_offset (4, 4); \
stw r5, (sp, 8); \
cfi_rel_offset (5, 8); \
ldw r4, (sp, 16); \
ldw r5, (sp, 20)
# undef UNDOARGS_0
# define UNDOARGS_0 \
ldw r7, (sp, 0); \
cfi_restore (r7); \
addi sp, 8; \
cfi_adjust_cfa_offset (-8);
# undef UNDOARGS_1
# define UNDOARGS_1 UNDOARGS_0
# undef UNDOARGS_2
# define UNDOARGS_2 UNDOARGS_0
# undef UNDOARGS_3
# define UNDOARGS_3 UNDOARGS_0
# undef UNDOARGS_4
# define UNDOARGS_4 UNDOARGS_0
# undef UNDOARGS_5
# define UNDOARGS_5 \
ldw r7, (sp, 0); \
cfi_restore (r4); \
ldw r4, (sp, 4); \
cfi_restore (r4); \
addi sp, 8; \
cfi_adjust_cfa_offset (-8);
# undef UNDOARGS_6
# define UNDOARGS_6 \
ldw r7, (sp, 0); \
cfi_restore (r7); \
ldw r4, (sp, 4); \
cfi_restore (r4); \
ldw r5, (sp, 8); \
cfi_restore (r5); \
addi sp, 16; \
cfi_adjust_cfa_offset (-16);
#else /* not __ASSEMBLER__ */
# undef INTERNAL_SYSCALL_RAW
# define INTERNAL_SYSCALL_RAW0(name, dummy...) \
({unsigned int __sys_result; \
{ \
register int _a1 __asm__ ("a0"), _nr __asm__ ("r7"); \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW1(name, arg1) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1); \
{ \
register int _a1 __asm__ ("a0"), _nr __asm__ ("r7"); \
_a1 = _tmp_arg1; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW2(name, arg1, arg2) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
_a1 = _tmp_arg1, _a2 = _tmp_arg2; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW3(name, arg1, arg2, arg3) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
register int _tmp_arg3 = (int)(arg3); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
register int _a3 __asm__ ("a2"); \
_a1 = _tmp_arg1; \
_a2 = _tmp_arg2; \
_a3 = _tmp_arg3; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2), \
"r" (_a3) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW4(name, arg1, arg2, arg3, arg4) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \
_a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \
_a4 = _tmp_arg4; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2), \
"r" (_a3), "r" (_a4) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW5(name, arg1, arg2, arg3, arg4, \
arg5) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \
register int _tmp_arg5 = (int)(arg5); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \
register int _a5 __asm__ ("r4"); \
_a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \
_a4 = _tmp_arg4, _a5 = _tmp_arg5; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2), \
"r" (_a3), "r" (_a4), "r" (_a5) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW6(name, arg1, arg2, arg3, arg4, \
arg5, arg6) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \
register int _tmp_arg5 = (int)(arg5), _tmp_arg6 = (int)(arg6); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \
register int _a5 __asm__ ("r4"), _a6 __asm__ ("r5"); \
_a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \
_a4 = _tmp_arg4, _a5 = _tmp_arg5, _a6 = _tmp_arg6; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2), \
"r" (_a3), "r" (_a4), "r" (_a5), \
"r" (_a6) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# define INTERNAL_SYSCALL_RAW7(name, arg1, arg2, arg3, arg4, \
arg5, arg6, arg7) \
({unsigned int __sys_result; \
register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \
register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \
register int _tmp_arg5 = (int)(arg5), _tmp_arg6 = (int)(arg6); \
register int _tmp_arg7 = (int)(arg7); \
{ \
register int _nr __asm__ ("r7"); \
register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \
register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \
register int _a5 __asm__ ("r4"), _a6 __asm__ ("r5"); \
register int _a7 __asm__ ("r6"); \
_a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \
_a4 = _tmp_arg4, _a5 = _tmp_arg5, _a6 = _tmp_arg6; \
_a7 = _tmp_arg7; \
_nr = name; \
__asm__ __volatile__ ("trap 0 \n\t" \
: "=r" (_a1) \
: "r" (_nr), "r" (_a1), "r" (_a2), \
"r" (_a3), "r" (_a4), "r" (_a5), \
"r" (_a6), "r" (_a7) \
: "memory"); \
__sys_result = _a1; \
} \
(int) __sys_result; })
# undef INTERNAL_SYSCALL
# define INTERNAL_SYSCALL(name, nr, args...) \
INTERNAL_SYSCALL_RAW##nr(SYS_ify(name), args)
# undef INTERNAL_SYSCALL_NCS
# define INTERNAL_SYSCALL_NCS(number, nr, args...) \
INTERNAL_SYSCALL_RAW##nr (number, args)
#endif /* __ASSEMBLER__ */
/* Pointer mangling support. */
#if (IS_IN (rtld) \
|| (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, guard) \
grs t0, 1f; \
1: \
lrw guard, 1b@GOTPC; \
addu t0, guard; \
lrw guard, __pointer_chk_guard_local@GOT; \
ldr.w guard, (t0, guard << 0); \
ldw guard, (guard, 0); \
xor dst, src, guard;
# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
# define PTR_MANGLE2(dst, src, guard) \
xor dst, src, guard
# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
# else
extern uintptr_t __pointer_chk_guard_local;
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#else
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, guard) \
grs t0, 1f; \
1: \
lrw guard, 1b@GOTPC; \
addu t0, guard; \
lrw guard, __pointer_chk_guard@GOT; \
ldr.w guard, (t0, guard << 0); \
ldw guard, (guard, 0); \
xor dst, src, guard;
# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
# define PTR_MANGLE2(dst, src, guard) \
xor dst, src, guard
# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
# else
extern uintptr_t __pointer_chk_guard;
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#endif
#endif /* linux/csky/sysdep.h */
|
