2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1992 Ross Biro
7 * Copyright (C) Linus Torvalds
8 * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
9 * Copyright (C) 1996 David S. Miller
10 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
11 * Copyright (C) 1999 MIPS Technologies, Inc.
12 * Copyright (C) 2000 Ulf Carlsson
14 * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit
17 #include <linux/compiler.h>
18 #include <linux/context_tracking.h>
19 #include <linux/elf.h>
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/sched/task_stack.h>
24 #include <linux/errno.h>
25 #include <linux/ptrace.h>
26 #include <linux/regset.h>
27 #include <linux/smp.h>
28 #include <linux/security.h>
29 #include <linux/stddef.h>
30 #include <linux/tracehook.h>
31 #include <linux/audit.h>
32 #include <linux/seccomp.h>
33 #include <linux/ftrace.h>
35 #include <asm/byteorder.h>
37 #include <asm/cpu-info.h>
40 #include <asm/mipsregs.h>
41 #include <asm/mipsmtregs.h>
42 #include <asm/pgtable.h>
44 #include <asm/syscall.h>
45 #include <linux/uaccess.h>
46 #include <asm/bootinfo.h>
49 #define CREATE_TRACE_POINTS
50 #include <trace/events/syscalls.h>
52 static void init_fp_ctx(struct task_struct
*target
)
54 /* If FP has been used then the target already has context */
55 if (tsk_used_math(target
))
58 /* Begin with data registers set to all 1s... */
59 memset(&target
->thread
.fpu
.fpr
, ~0, sizeof(target
->thread
.fpu
.fpr
));
61 /* FCSR has been preset by `mips_set_personality_nan'. */
64 * Record that the target has "used" math, such that the context
65 * just initialised, and any modifications made by the caller,
68 set_stopped_child_used_math(target
);
72 * Called by kernel/ptrace.c when detaching..
74 * Make sure single step bits etc are not set.
76 void ptrace_disable(struct task_struct
*child
)
78 /* Don't load the watchpoint registers for the ex-child. */
79 clear_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
83 * Poke at FCSR according to its mask. Set the Cause bits even
84 * if a corresponding Enable bit is set. This will be noticed at
85 * the time the thread is switched to and SIGFPE thrown accordingly.
87 static void ptrace_setfcr31(struct task_struct
*child
, u32 value
)
92 fcr31
= child
->thread
.fpu
.fcr31
;
93 mask
= boot_cpu_data
.fpu_msk31
;
94 child
->thread
.fpu
.fcr31
= (value
& ~mask
) | (fcr31
& mask
);
98 * Read a general register set. We always use the 64-bit format, even
99 * for 32-bit kernels and for 32-bit processes on a 64-bit kernel.
100 * Registers are sign extended to fill the available space.
102 int ptrace_getregs(struct task_struct
*child
, struct user_pt_regs __user
*data
)
104 struct pt_regs
*regs
;
107 if (!access_ok(VERIFY_WRITE
, data
, 38 * 8))
110 regs
= task_pt_regs(child
);
112 for (i
= 0; i
< 32; i
++)
113 __put_user((long)regs
->regs
[i
], (__s64 __user
*)&data
->regs
[i
]);
114 __put_user((long)regs
->lo
, (__s64 __user
*)&data
->lo
);
115 __put_user((long)regs
->hi
, (__s64 __user
*)&data
->hi
);
116 __put_user((long)regs
->cp0_epc
, (__s64 __user
*)&data
->cp0_epc
);
117 __put_user((long)regs
->cp0_badvaddr
, (__s64 __user
*)&data
->cp0_badvaddr
);
118 __put_user((long)regs
->cp0_status
, (__s64 __user
*)&data
->cp0_status
);
119 __put_user((long)regs
->cp0_cause
, (__s64 __user
*)&data
->cp0_cause
);
125 * Write a general register set. As for PTRACE_GETREGS, we always use
126 * the 64-bit format. On a 32-bit kernel only the lower order half
127 * (according to endianness) will be used.
129 int ptrace_setregs(struct task_struct
*child
, struct user_pt_regs __user
*data
)
131 struct pt_regs
*regs
;
134 if (!access_ok(VERIFY_READ
, data
, 38 * 8))
137 regs
= task_pt_regs(child
);
139 for (i
= 0; i
< 32; i
++)
140 __get_user(regs
->regs
[i
], (__s64 __user
*)&data
->regs
[i
]);
141 __get_user(regs
->lo
, (__s64 __user
*)&data
->lo
);
142 __get_user(regs
->hi
, (__s64 __user
*)&data
->hi
);
143 __get_user(regs
->cp0_epc
, (__s64 __user
*)&data
->cp0_epc
);
145 /* badvaddr, status, and cause may not be written. */
150 int ptrace_getfpregs(struct task_struct
*child
, __u32 __user
*data
)
154 if (!access_ok(VERIFY_WRITE
, data
, 33 * 8))
157 if (tsk_used_math(child
)) {
158 union fpureg
*fregs
= get_fpu_regs(child
);
159 for (i
= 0; i
< 32; i
++)
160 __put_user(get_fpr64(&fregs
[i
], 0),
161 i
+ (__u64 __user
*)data
);
163 for (i
= 0; i
< 32; i
++)
164 __put_user((__u64
) -1, i
+ (__u64 __user
*) data
);
167 __put_user(child
->thread
.fpu
.fcr31
, data
+ 64);
168 __put_user(boot_cpu_data
.fpu_id
, data
+ 65);
173 int ptrace_setfpregs(struct task_struct
*child
, __u32 __user
*data
)
180 if (!access_ok(VERIFY_READ
, data
, 33 * 8))
184 fregs
= get_fpu_regs(child
);
186 for (i
= 0; i
< 32; i
++) {
187 __get_user(fpr_val
, i
+ (__u64 __user
*)data
);
188 set_fpr64(&fregs
[i
], 0, fpr_val
);
191 __get_user(value
, data
+ 64);
192 ptrace_setfcr31(child
, value
);
194 /* FIR may not be written. */
199 int ptrace_get_watch_regs(struct task_struct
*child
,
200 struct pt_watch_regs __user
*addr
)
202 enum pt_watch_style style
;
205 if (!cpu_has_watch
|| boot_cpu_data
.watch_reg_use_cnt
== 0)
207 if (!access_ok(VERIFY_WRITE
, addr
, sizeof(struct pt_watch_regs
)))
211 style
= pt_watch_style_mips32
;
212 #define WATCH_STYLE mips32
214 style
= pt_watch_style_mips64
;
215 #define WATCH_STYLE mips64
218 __put_user(style
, &addr
->style
);
219 __put_user(boot_cpu_data
.watch_reg_use_cnt
,
220 &addr
->WATCH_STYLE
.num_valid
);
221 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
222 __put_user(child
->thread
.watch
.mips3264
.watchlo
[i
],
223 &addr
->WATCH_STYLE
.watchlo
[i
]);
224 __put_user(child
->thread
.watch
.mips3264
.watchhi
[i
] &
225 (MIPS_WATCHHI_MASK
| MIPS_WATCHHI_IRW
),
226 &addr
->WATCH_STYLE
.watchhi
[i
]);
227 __put_user(boot_cpu_data
.watch_reg_masks
[i
],
228 &addr
->WATCH_STYLE
.watch_masks
[i
]);
231 __put_user(0, &addr
->WATCH_STYLE
.watchlo
[i
]);
232 __put_user(0, &addr
->WATCH_STYLE
.watchhi
[i
]);
233 __put_user(0, &addr
->WATCH_STYLE
.watch_masks
[i
]);
239 int ptrace_set_watch_regs(struct task_struct
*child
,
240 struct pt_watch_regs __user
*addr
)
243 int watch_active
= 0;
244 unsigned long lt
[NUM_WATCH_REGS
];
245 u16 ht
[NUM_WATCH_REGS
];
247 if (!cpu_has_watch
|| boot_cpu_data
.watch_reg_use_cnt
== 0)
249 if (!access_ok(VERIFY_READ
, addr
, sizeof(struct pt_watch_regs
)))
251 /* Check the values. */
252 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
253 __get_user(lt
[i
], &addr
->WATCH_STYLE
.watchlo
[i
]);
255 if (lt
[i
] & __UA_LIMIT
)
258 if (test_tsk_thread_flag(child
, TIF_32BIT_ADDR
)) {
259 if (lt
[i
] & 0xffffffff80000000UL
)
262 if (lt
[i
] & __UA_LIMIT
)
266 __get_user(ht
[i
], &addr
->WATCH_STYLE
.watchhi
[i
]);
267 if (ht
[i
] & ~MIPS_WATCHHI_MASK
)
271 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
272 if (lt
[i
] & MIPS_WATCHLO_IRW
)
274 child
->thread
.watch
.mips3264
.watchlo
[i
] = lt
[i
];
276 child
->thread
.watch
.mips3264
.watchhi
[i
] = ht
[i
];
280 set_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
282 clear_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
287 /* regset get/set implementations */
289 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
291 static int gpr32_get(struct task_struct
*target
,
292 const struct user_regset
*regset
,
293 unsigned int pos
, unsigned int count
,
294 void *kbuf
, void __user
*ubuf
)
296 struct pt_regs
*regs
= task_pt_regs(target
);
297 u32 uregs
[ELF_NGREG
] = {};
299 mips_dump_regs32(uregs
, regs
);
300 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
304 static int gpr32_set(struct task_struct
*target
,
305 const struct user_regset
*regset
,
306 unsigned int pos
, unsigned int count
,
307 const void *kbuf
, const void __user
*ubuf
)
309 struct pt_regs
*regs
= task_pt_regs(target
);
310 u32 uregs
[ELF_NGREG
];
311 unsigned start
, num_regs
, i
;
314 start
= pos
/ sizeof(u32
);
315 num_regs
= count
/ sizeof(u32
);
317 if (start
+ num_regs
> ELF_NGREG
)
320 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
325 for (i
= start
; i
< num_regs
; i
++) {
327 * Cast all values to signed here so that if this is a 64-bit
328 * kernel, the supplied 32-bit values will be sign extended.
331 case MIPS32_EF_R1
... MIPS32_EF_R25
:
332 /* k0/k1 are ignored. */
333 case MIPS32_EF_R28
... MIPS32_EF_R31
:
334 regs
->regs
[i
- MIPS32_EF_R0
] = (s32
)uregs
[i
];
337 regs
->lo
= (s32
)uregs
[i
];
340 regs
->hi
= (s32
)uregs
[i
];
342 case MIPS32_EF_CP0_EPC
:
343 regs
->cp0_epc
= (s32
)uregs
[i
];
351 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
355 static int gpr64_get(struct task_struct
*target
,
356 const struct user_regset
*regset
,
357 unsigned int pos
, unsigned int count
,
358 void *kbuf
, void __user
*ubuf
)
360 struct pt_regs
*regs
= task_pt_regs(target
);
361 u64 uregs
[ELF_NGREG
] = {};
363 mips_dump_regs64(uregs
, regs
);
364 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
368 static int gpr64_set(struct task_struct
*target
,
369 const struct user_regset
*regset
,
370 unsigned int pos
, unsigned int count
,
371 const void *kbuf
, const void __user
*ubuf
)
373 struct pt_regs
*regs
= task_pt_regs(target
);
374 u64 uregs
[ELF_NGREG
];
375 unsigned start
, num_regs
, i
;
378 start
= pos
/ sizeof(u64
);
379 num_regs
= count
/ sizeof(u64
);
381 if (start
+ num_regs
> ELF_NGREG
)
384 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
389 for (i
= start
; i
< num_regs
; i
++) {
391 case MIPS64_EF_R1
... MIPS64_EF_R25
:
392 /* k0/k1 are ignored. */
393 case MIPS64_EF_R28
... MIPS64_EF_R31
:
394 regs
->regs
[i
- MIPS64_EF_R0
] = uregs
[i
];
402 case MIPS64_EF_CP0_EPC
:
403 regs
->cp0_epc
= uregs
[i
];
411 #endif /* CONFIG_64BIT */
413 static int fpr_get(struct task_struct
*target
,
414 const struct user_regset
*regset
,
415 unsigned int pos
, unsigned int count
,
416 void *kbuf
, void __user
*ubuf
)
424 if (sizeof(target
->thread
.fpu
.fpr
[i
]) == sizeof(elf_fpreg_t
))
425 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
,
427 0, sizeof(elf_fpregset_t
));
429 for (i
= 0; i
< NUM_FPU_REGS
; i
++) {
430 fpr_val
= get_fpr64(&target
->thread
.fpu
.fpr
[i
], 0);
431 err
= user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
,
432 &fpr_val
, i
* sizeof(elf_fpreg_t
),
433 (i
+ 1) * sizeof(elf_fpreg_t
));
441 static int fpr_set(struct task_struct
*target
,
442 const struct user_regset
*regset
,
443 unsigned int pos
, unsigned int count
,
444 const void *kbuf
, const void __user
*ubuf
)
454 if (sizeof(target
->thread
.fpu
.fpr
[i
]) == sizeof(elf_fpreg_t
))
455 return user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
,
457 0, sizeof(elf_fpregset_t
));
459 BUILD_BUG_ON(sizeof(fpr_val
) != sizeof(elf_fpreg_t
));
460 for (i
= 0; i
< NUM_FPU_REGS
&& count
>= sizeof(elf_fpreg_t
); i
++) {
461 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
,
462 &fpr_val
, i
* sizeof(elf_fpreg_t
),
463 (i
+ 1) * sizeof(elf_fpreg_t
));
466 set_fpr64(&target
->thread
.fpu
.fpr
[i
], 0, fpr_val
);
477 struct pt_regs_offset
{
482 #define REG_OFFSET_NAME(reg, r) { \
484 .offset = offsetof(struct pt_regs, r) \
487 #define REG_OFFSET_END { \
492 static const struct pt_regs_offset regoffset_table
[] = {
493 REG_OFFSET_NAME(r0
, regs
[0]),
494 REG_OFFSET_NAME(r1
, regs
[1]),
495 REG_OFFSET_NAME(r2
, regs
[2]),
496 REG_OFFSET_NAME(r3
, regs
[3]),
497 REG_OFFSET_NAME(r4
, regs
[4]),
498 REG_OFFSET_NAME(r5
, regs
[5]),
499 REG_OFFSET_NAME(r6
, regs
[6]),
500 REG_OFFSET_NAME(r7
, regs
[7]),
501 REG_OFFSET_NAME(r8
, regs
[8]),
502 REG_OFFSET_NAME(r9
, regs
[9]),
503 REG_OFFSET_NAME(r10
, regs
[10]),
504 REG_OFFSET_NAME(r11
, regs
[11]),
505 REG_OFFSET_NAME(r12
, regs
[12]),
506 REG_OFFSET_NAME(r13
, regs
[13]),
507 REG_OFFSET_NAME(r14
, regs
[14]),
508 REG_OFFSET_NAME(r15
, regs
[15]),
509 REG_OFFSET_NAME(r16
, regs
[16]),
510 REG_OFFSET_NAME(r17
, regs
[17]),
511 REG_OFFSET_NAME(r18
, regs
[18]),
512 REG_OFFSET_NAME(r19
, regs
[19]),
513 REG_OFFSET_NAME(r20
, regs
[20]),
514 REG_OFFSET_NAME(r21
, regs
[21]),
515 REG_OFFSET_NAME(r22
, regs
[22]),
516 REG_OFFSET_NAME(r23
, regs
[23]),
517 REG_OFFSET_NAME(r24
, regs
[24]),
518 REG_OFFSET_NAME(r25
, regs
[25]),
519 REG_OFFSET_NAME(r26
, regs
[26]),
520 REG_OFFSET_NAME(r27
, regs
[27]),
521 REG_OFFSET_NAME(r28
, regs
[28]),
522 REG_OFFSET_NAME(r29
, regs
[29]),
523 REG_OFFSET_NAME(r30
, regs
[30]),
524 REG_OFFSET_NAME(r31
, regs
[31]),
525 REG_OFFSET_NAME(c0_status
, cp0_status
),
526 REG_OFFSET_NAME(hi
, hi
),
527 REG_OFFSET_NAME(lo
, lo
),
528 #ifdef CONFIG_CPU_HAS_SMARTMIPS
529 REG_OFFSET_NAME(acx
, acx
),
531 REG_OFFSET_NAME(c0_badvaddr
, cp0_badvaddr
),
532 REG_OFFSET_NAME(c0_cause
, cp0_cause
),
533 REG_OFFSET_NAME(c0_epc
, cp0_epc
),
534 #ifdef CONFIG_CPU_CAVIUM_OCTEON
535 REG_OFFSET_NAME(mpl0
, mpl
[0]),
536 REG_OFFSET_NAME(mpl1
, mpl
[1]),
537 REG_OFFSET_NAME(mpl2
, mpl
[2]),
538 REG_OFFSET_NAME(mtp0
, mtp
[0]),
539 REG_OFFSET_NAME(mtp1
, mtp
[1]),
540 REG_OFFSET_NAME(mtp2
, mtp
[2]),
546 * regs_query_register_offset() - query register offset from its name
547 * @name: the name of a register
549 * regs_query_register_offset() returns the offset of a register in struct
550 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
552 int regs_query_register_offset(const char *name
)
554 const struct pt_regs_offset
*roff
;
555 for (roff
= regoffset_table
; roff
->name
!= NULL
; roff
++)
556 if (!strcmp(roff
->name
, name
))
561 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
563 static const struct user_regset mips_regsets
[] = {
565 .core_note_type
= NT_PRSTATUS
,
567 .size
= sizeof(unsigned int),
568 .align
= sizeof(unsigned int),
573 .core_note_type
= NT_PRFPREG
,
575 .size
= sizeof(elf_fpreg_t
),
576 .align
= sizeof(elf_fpreg_t
),
582 static const struct user_regset_view user_mips_view
= {
584 .e_machine
= ELF_ARCH
,
585 .ei_osabi
= ELF_OSABI
,
586 .regsets
= mips_regsets
,
587 .n
= ARRAY_SIZE(mips_regsets
),
590 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
594 static const struct user_regset mips64_regsets
[] = {
596 .core_note_type
= NT_PRSTATUS
,
598 .size
= sizeof(unsigned long),
599 .align
= sizeof(unsigned long),
604 .core_note_type
= NT_PRFPREG
,
606 .size
= sizeof(elf_fpreg_t
),
607 .align
= sizeof(elf_fpreg_t
),
613 static const struct user_regset_view user_mips64_view
= {
615 .e_machine
= ELF_ARCH
,
616 .ei_osabi
= ELF_OSABI
,
617 .regsets
= mips64_regsets
,
618 .n
= ARRAY_SIZE(mips64_regsets
),
621 #endif /* CONFIG_64BIT */
623 const struct user_regset_view
*task_user_regset_view(struct task_struct
*task
)
626 return &user_mips_view
;
628 #ifdef CONFIG_MIPS32_O32
629 if (test_tsk_thread_flag(task
, TIF_32BIT_REGS
))
630 return &user_mips_view
;
632 return &user_mips64_view
;
636 long arch_ptrace(struct task_struct
*child
, long request
,
637 unsigned long addr
, unsigned long data
)
640 void __user
*addrp
= (void __user
*) addr
;
641 void __user
*datavp
= (void __user
*) data
;
642 unsigned long __user
*datalp
= (void __user
*) data
;
645 /* when I and D space are separate, these will need to be fixed. */
646 case PTRACE_PEEKTEXT
: /* read word at location addr. */
647 case PTRACE_PEEKDATA
:
648 ret
= generic_ptrace_peekdata(child
, addr
, data
);
651 /* Read the word at location addr in the USER area. */
652 case PTRACE_PEEKUSR
: {
653 struct pt_regs
*regs
;
655 unsigned long tmp
= 0;
657 regs
= task_pt_regs(child
);
658 ret
= 0; /* Default return value. */
662 tmp
= regs
->regs
[addr
];
664 case FPR_BASE
... FPR_BASE
+ 31:
665 if (!tsk_used_math(child
)) {
666 /* FP not yet used */
670 fregs
= get_fpu_regs(child
);
673 if (test_thread_flag(TIF_32BIT_FPREGS
)) {
675 * The odd registers are actually the high
676 * order bits of the values stored in the even
677 * registers - unless we're using r2k_switch.S.
679 tmp
= get_fpr32(&fregs
[(addr
& ~1) - FPR_BASE
],
684 tmp
= get_fpr32(&fregs
[addr
- FPR_BASE
], 0);
690 tmp
= regs
->cp0_cause
;
693 tmp
= regs
->cp0_badvaddr
;
701 #ifdef CONFIG_CPU_HAS_SMARTMIPS
707 tmp
= child
->thread
.fpu
.fcr31
;
710 /* implementation / version register */
711 tmp
= boot_cpu_data
.fpu_id
;
713 case DSP_BASE
... DSP_BASE
+ 5: {
721 dregs
= __get_dsp_regs(child
);
722 tmp
= (unsigned long) (dregs
[addr
- DSP_BASE
]);
731 tmp
= child
->thread
.dsp
.dspcontrol
;
738 ret
= put_user(tmp
, datalp
);
742 /* when I and D space are separate, this will have to be fixed. */
743 case PTRACE_POKETEXT
: /* write the word at location addr. */
744 case PTRACE_POKEDATA
:
745 ret
= generic_ptrace_pokedata(child
, addr
, data
);
748 case PTRACE_POKEUSR
: {
749 struct pt_regs
*regs
;
751 regs
= task_pt_regs(child
);
755 regs
->regs
[addr
] = data
;
757 case FPR_BASE
... FPR_BASE
+ 31: {
758 union fpureg
*fregs
= get_fpu_regs(child
);
762 if (test_thread_flag(TIF_32BIT_FPREGS
)) {
764 * The odd registers are actually the high
765 * order bits of the values stored in the even
766 * registers - unless we're using r2k_switch.S.
768 set_fpr32(&fregs
[(addr
& ~1) - FPR_BASE
],
773 set_fpr64(&fregs
[addr
- FPR_BASE
], 0, data
);
777 regs
->cp0_epc
= data
;
785 #ifdef CONFIG_CPU_HAS_SMARTMIPS
792 ptrace_setfcr31(child
, data
);
794 case DSP_BASE
... DSP_BASE
+ 5: {
802 dregs
= __get_dsp_regs(child
);
803 dregs
[addr
- DSP_BASE
] = data
;
811 child
->thread
.dsp
.dspcontrol
= data
;
814 /* The rest are not allowed. */
822 ret
= ptrace_getregs(child
, datavp
);
826 ret
= ptrace_setregs(child
, datavp
);
829 case PTRACE_GETFPREGS
:
830 ret
= ptrace_getfpregs(child
, datavp
);
833 case PTRACE_SETFPREGS
:
834 ret
= ptrace_setfpregs(child
, datavp
);
837 case PTRACE_GET_THREAD_AREA
:
838 ret
= put_user(task_thread_info(child
)->tp_value
, datalp
);
841 case PTRACE_GET_WATCH_REGS
:
842 ret
= ptrace_get_watch_regs(child
, addrp
);
845 case PTRACE_SET_WATCH_REGS
:
846 ret
= ptrace_set_watch_regs(child
, addrp
);
850 ret
= ptrace_request(child
, request
, addr
, data
);
858 * Notification of system call entry/exit
859 * - triggered by current->work.syscall_trace
861 asmlinkage
long syscall_trace_enter(struct pt_regs
*regs
, long syscall
)
865 current_thread_info()->syscall
= syscall
;
867 if (test_thread_flag(TIF_SYSCALL_TRACE
) &&
868 tracehook_report_syscall_entry(regs
))
871 #ifdef CONFIG_SECCOMP
872 if (unlikely(test_thread_flag(TIF_SECCOMP
))) {
874 struct seccomp_data sd
;
877 sd
.arch
= syscall_get_arch();
878 for (i
= 0; i
< 6; i
++) {
881 r
= mips_get_syscall_arg(&v
, current
, regs
, i
);
882 sd
.args
[i
] = r
? 0 : v
;
884 sd
.instruction_pointer
= KSTK_EIP(current
);
886 ret
= __secure_computing(&sd
);
892 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT
)))
893 trace_sys_enter(regs
, regs
->regs
[2]);
895 audit_syscall_entry(syscall
, regs
->regs
[4], regs
->regs
[5],
896 regs
->regs
[6], regs
->regs
[7]);
899 * Negative syscall numbers are mistaken for rejected syscalls, but
900 * won't have had the return value set appropriately, so we do so now.
903 syscall_set_return_value(current
, regs
, -ENOSYS
, 0);
908 * Notification of system call entry/exit
909 * - triggered by current->work.syscall_trace
911 asmlinkage
void syscall_trace_leave(struct pt_regs
*regs
)
914 * We may come here right after calling schedule_user()
915 * or do_notify_resume(), in which case we can be in RCU
920 audit_syscall_exit(regs
);
922 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT
)))
923 trace_sys_exit(regs
, regs_return_value(regs
));
925 if (test_thread_flag(TIF_SYSCALL_TRACE
))
926 tracehook_report_syscall_exit(regs
, 0);