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>
23 #include <linux/errno.h>
24 #include <linux/ptrace.h>
25 #include <linux/regset.h>
26 #include <linux/smp.h>
27 #include <linux/security.h>
28 #include <linux/stddef.h>
29 #include <linux/tracehook.h>
30 #include <linux/audit.h>
31 #include <linux/seccomp.h>
32 #include <linux/ftrace.h>
34 #include <asm/byteorder.h>
36 #include <asm/cpu-info.h>
39 #include <asm/mipsregs.h>
40 #include <asm/mipsmtregs.h>
41 #include <asm/pgtable.h>
43 #include <asm/syscall.h>
44 #include <linux/uaccess.h>
45 #include <asm/bootinfo.h>
48 #define CREATE_TRACE_POINTS
49 #include <trace/events/syscalls.h>
51 static void init_fp_ctx(struct task_struct
*target
)
53 /* If FP has been used then the target already has context */
54 if (tsk_used_math(target
))
57 /* Begin with data registers set to all 1s... */
58 memset(&target
->thread
.fpu
.fpr
, ~0, sizeof(target
->thread
.fpu
.fpr
));
60 /* FCSR has been preset by `mips_set_personality_nan'. */
63 * Record that the target has "used" math, such that the context
64 * just initialised, and any modifications made by the caller,
67 set_stopped_child_used_math(target
);
71 * Called by kernel/ptrace.c when detaching..
73 * Make sure single step bits etc are not set.
75 void ptrace_disable(struct task_struct
*child
)
77 /* Don't load the watchpoint registers for the ex-child. */
78 clear_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
82 * Poke at FCSR according to its mask. Set the Cause bits even
83 * if a corresponding Enable bit is set. This will be noticed at
84 * the time the thread is switched to and SIGFPE thrown accordingly.
86 static void ptrace_setfcr31(struct task_struct
*child
, u32 value
)
91 fcr31
= child
->thread
.fpu
.fcr31
;
92 mask
= boot_cpu_data
.fpu_msk31
;
93 child
->thread
.fpu
.fcr31
= (value
& ~mask
) | (fcr31
& mask
);
97 * Read a general register set. We always use the 64-bit format, even
98 * for 32-bit kernels and for 32-bit processes on a 64-bit kernel.
99 * Registers are sign extended to fill the available space.
101 int ptrace_getregs(struct task_struct
*child
, struct user_pt_regs __user
*data
)
103 struct pt_regs
*regs
;
106 if (!access_ok(VERIFY_WRITE
, data
, 38 * 8))
109 regs
= task_pt_regs(child
);
111 for (i
= 0; i
< 32; i
++)
112 __put_user((long)regs
->regs
[i
], (__s64 __user
*)&data
->regs
[i
]);
113 __put_user((long)regs
->lo
, (__s64 __user
*)&data
->lo
);
114 __put_user((long)regs
->hi
, (__s64 __user
*)&data
->hi
);
115 __put_user((long)regs
->cp0_epc
, (__s64 __user
*)&data
->cp0_epc
);
116 __put_user((long)regs
->cp0_badvaddr
, (__s64 __user
*)&data
->cp0_badvaddr
);
117 __put_user((long)regs
->cp0_status
, (__s64 __user
*)&data
->cp0_status
);
118 __put_user((long)regs
->cp0_cause
, (__s64 __user
*)&data
->cp0_cause
);
124 * Write a general register set. As for PTRACE_GETREGS, we always use
125 * the 64-bit format. On a 32-bit kernel only the lower order half
126 * (according to endianness) will be used.
128 int ptrace_setregs(struct task_struct
*child
, struct user_pt_regs __user
*data
)
130 struct pt_regs
*regs
;
133 if (!access_ok(VERIFY_READ
, data
, 38 * 8))
136 regs
= task_pt_regs(child
);
138 for (i
= 0; i
< 32; i
++)
139 __get_user(regs
->regs
[i
], (__s64 __user
*)&data
->regs
[i
]);
140 __get_user(regs
->lo
, (__s64 __user
*)&data
->lo
);
141 __get_user(regs
->hi
, (__s64 __user
*)&data
->hi
);
142 __get_user(regs
->cp0_epc
, (__s64 __user
*)&data
->cp0_epc
);
144 /* badvaddr, status, and cause may not be written. */
149 int ptrace_getfpregs(struct task_struct
*child
, __u32 __user
*data
)
153 if (!access_ok(VERIFY_WRITE
, data
, 33 * 8))
156 if (tsk_used_math(child
)) {
157 union fpureg
*fregs
= get_fpu_regs(child
);
158 for (i
= 0; i
< 32; i
++)
159 __put_user(get_fpr64(&fregs
[i
], 0),
160 i
+ (__u64 __user
*)data
);
162 for (i
= 0; i
< 32; i
++)
163 __put_user((__u64
) -1, i
+ (__u64 __user
*) data
);
166 __put_user(child
->thread
.fpu
.fcr31
, data
+ 64);
167 __put_user(boot_cpu_data
.fpu_id
, data
+ 65);
172 int ptrace_setfpregs(struct task_struct
*child
, __u32 __user
*data
)
179 if (!access_ok(VERIFY_READ
, data
, 33 * 8))
183 fregs
= get_fpu_regs(child
);
185 for (i
= 0; i
< 32; i
++) {
186 __get_user(fpr_val
, i
+ (__u64 __user
*)data
);
187 set_fpr64(&fregs
[i
], 0, fpr_val
);
190 __get_user(value
, data
+ 64);
191 ptrace_setfcr31(child
, value
);
193 /* FIR may not be written. */
198 int ptrace_get_watch_regs(struct task_struct
*child
,
199 struct pt_watch_regs __user
*addr
)
201 enum pt_watch_style style
;
204 if (!cpu_has_watch
|| boot_cpu_data
.watch_reg_use_cnt
== 0)
206 if (!access_ok(VERIFY_WRITE
, addr
, sizeof(struct pt_watch_regs
)))
210 style
= pt_watch_style_mips32
;
211 #define WATCH_STYLE mips32
213 style
= pt_watch_style_mips64
;
214 #define WATCH_STYLE mips64
217 __put_user(style
, &addr
->style
);
218 __put_user(boot_cpu_data
.watch_reg_use_cnt
,
219 &addr
->WATCH_STYLE
.num_valid
);
220 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
221 __put_user(child
->thread
.watch
.mips3264
.watchlo
[i
],
222 &addr
->WATCH_STYLE
.watchlo
[i
]);
223 __put_user(child
->thread
.watch
.mips3264
.watchhi
[i
] &
224 (MIPS_WATCHHI_MASK
| MIPS_WATCHHI_IRW
),
225 &addr
->WATCH_STYLE
.watchhi
[i
]);
226 __put_user(boot_cpu_data
.watch_reg_masks
[i
],
227 &addr
->WATCH_STYLE
.watch_masks
[i
]);
230 __put_user(0, &addr
->WATCH_STYLE
.watchlo
[i
]);
231 __put_user(0, &addr
->WATCH_STYLE
.watchhi
[i
]);
232 __put_user(0, &addr
->WATCH_STYLE
.watch_masks
[i
]);
238 int ptrace_set_watch_regs(struct task_struct
*child
,
239 struct pt_watch_regs __user
*addr
)
242 int watch_active
= 0;
243 unsigned long lt
[NUM_WATCH_REGS
];
244 u16 ht
[NUM_WATCH_REGS
];
246 if (!cpu_has_watch
|| boot_cpu_data
.watch_reg_use_cnt
== 0)
248 if (!access_ok(VERIFY_READ
, addr
, sizeof(struct pt_watch_regs
)))
250 /* Check the values. */
251 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
252 __get_user(lt
[i
], &addr
->WATCH_STYLE
.watchlo
[i
]);
254 if (lt
[i
] & __UA_LIMIT
)
257 if (test_tsk_thread_flag(child
, TIF_32BIT_ADDR
)) {
258 if (lt
[i
] & 0xffffffff80000000UL
)
261 if (lt
[i
] & __UA_LIMIT
)
265 __get_user(ht
[i
], &addr
->WATCH_STYLE
.watchhi
[i
]);
266 if (ht
[i
] & ~MIPS_WATCHHI_MASK
)
270 for (i
= 0; i
< boot_cpu_data
.watch_reg_use_cnt
; i
++) {
271 if (lt
[i
] & MIPS_WATCHLO_IRW
)
273 child
->thread
.watch
.mips3264
.watchlo
[i
] = lt
[i
];
275 child
->thread
.watch
.mips3264
.watchhi
[i
] = ht
[i
];
279 set_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
281 clear_tsk_thread_flag(child
, TIF_LOAD_WATCH
);
286 /* regset get/set implementations */
288 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
290 static int gpr32_get(struct task_struct
*target
,
291 const struct user_regset
*regset
,
292 unsigned int pos
, unsigned int count
,
293 void *kbuf
, void __user
*ubuf
)
295 struct pt_regs
*regs
= task_pt_regs(target
);
296 u32 uregs
[ELF_NGREG
] = {};
299 for (i
= MIPS32_EF_R1
; i
<= MIPS32_EF_R31
; i
++) {
300 /* k0/k1 are copied as zero. */
301 if (i
== MIPS32_EF_R26
|| i
== MIPS32_EF_R27
)
304 uregs
[i
] = regs
->regs
[i
- MIPS32_EF_R0
];
307 uregs
[MIPS32_EF_LO
] = regs
->lo
;
308 uregs
[MIPS32_EF_HI
] = regs
->hi
;
309 uregs
[MIPS32_EF_CP0_EPC
] = regs
->cp0_epc
;
310 uregs
[MIPS32_EF_CP0_BADVADDR
] = regs
->cp0_badvaddr
;
311 uregs
[MIPS32_EF_CP0_STATUS
] = regs
->cp0_status
;
312 uregs
[MIPS32_EF_CP0_CAUSE
] = regs
->cp0_cause
;
314 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
318 static int gpr32_set(struct task_struct
*target
,
319 const struct user_regset
*regset
,
320 unsigned int pos
, unsigned int count
,
321 const void *kbuf
, const void __user
*ubuf
)
323 struct pt_regs
*regs
= task_pt_regs(target
);
324 u32 uregs
[ELF_NGREG
];
325 unsigned start
, num_regs
, i
;
328 start
= pos
/ sizeof(u32
);
329 num_regs
= count
/ sizeof(u32
);
331 if (start
+ num_regs
> ELF_NGREG
)
334 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
339 for (i
= start
; i
< num_regs
; i
++) {
341 * Cast all values to signed here so that if this is a 64-bit
342 * kernel, the supplied 32-bit values will be sign extended.
345 case MIPS32_EF_R1
... MIPS32_EF_R25
:
346 /* k0/k1 are ignored. */
347 case MIPS32_EF_R28
... MIPS32_EF_R31
:
348 regs
->regs
[i
- MIPS32_EF_R0
] = (s32
)uregs
[i
];
351 regs
->lo
= (s32
)uregs
[i
];
354 regs
->hi
= (s32
)uregs
[i
];
356 case MIPS32_EF_CP0_EPC
:
357 regs
->cp0_epc
= (s32
)uregs
[i
];
365 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
369 static int gpr64_get(struct task_struct
*target
,
370 const struct user_regset
*regset
,
371 unsigned int pos
, unsigned int count
,
372 void *kbuf
, void __user
*ubuf
)
374 struct pt_regs
*regs
= task_pt_regs(target
);
375 u64 uregs
[ELF_NGREG
] = {};
378 for (i
= MIPS64_EF_R1
; i
<= MIPS64_EF_R31
; i
++) {
379 /* k0/k1 are copied as zero. */
380 if (i
== MIPS64_EF_R26
|| i
== MIPS64_EF_R27
)
383 uregs
[i
] = regs
->regs
[i
- MIPS64_EF_R0
];
386 uregs
[MIPS64_EF_LO
] = regs
->lo
;
387 uregs
[MIPS64_EF_HI
] = regs
->hi
;
388 uregs
[MIPS64_EF_CP0_EPC
] = regs
->cp0_epc
;
389 uregs
[MIPS64_EF_CP0_BADVADDR
] = regs
->cp0_badvaddr
;
390 uregs
[MIPS64_EF_CP0_STATUS
] = regs
->cp0_status
;
391 uregs
[MIPS64_EF_CP0_CAUSE
] = regs
->cp0_cause
;
393 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
397 static int gpr64_set(struct task_struct
*target
,
398 const struct user_regset
*regset
,
399 unsigned int pos
, unsigned int count
,
400 const void *kbuf
, const void __user
*ubuf
)
402 struct pt_regs
*regs
= task_pt_regs(target
);
403 u64 uregs
[ELF_NGREG
];
404 unsigned start
, num_regs
, i
;
407 start
= pos
/ sizeof(u64
);
408 num_regs
= count
/ sizeof(u64
);
410 if (start
+ num_regs
> ELF_NGREG
)
413 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
, uregs
, 0,
418 for (i
= start
; i
< num_regs
; i
++) {
420 case MIPS64_EF_R1
... MIPS64_EF_R25
:
421 /* k0/k1 are ignored. */
422 case MIPS64_EF_R28
... MIPS64_EF_R31
:
423 regs
->regs
[i
- MIPS64_EF_R0
] = uregs
[i
];
431 case MIPS64_EF_CP0_EPC
:
432 regs
->cp0_epc
= uregs
[i
];
440 #endif /* CONFIG_64BIT */
442 static int fpr_get(struct task_struct
*target
,
443 const struct user_regset
*regset
,
444 unsigned int pos
, unsigned int count
,
445 void *kbuf
, void __user
*ubuf
)
453 if (sizeof(target
->thread
.fpu
.fpr
[i
]) == sizeof(elf_fpreg_t
))
454 return user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
,
456 0, sizeof(elf_fpregset_t
));
458 for (i
= 0; i
< NUM_FPU_REGS
; i
++) {
459 fpr_val
= get_fpr64(&target
->thread
.fpu
.fpr
[i
], 0);
460 err
= user_regset_copyout(&pos
, &count
, &kbuf
, &ubuf
,
461 &fpr_val
, i
* sizeof(elf_fpreg_t
),
462 (i
+ 1) * sizeof(elf_fpreg_t
));
470 static int fpr_set(struct task_struct
*target
,
471 const struct user_regset
*regset
,
472 unsigned int pos
, unsigned int count
,
473 const void *kbuf
, const void __user
*ubuf
)
483 if (sizeof(target
->thread
.fpu
.fpr
[i
]) == sizeof(elf_fpreg_t
))
484 return user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
,
486 0, sizeof(elf_fpregset_t
));
488 BUILD_BUG_ON(sizeof(fpr_val
) != sizeof(elf_fpreg_t
));
489 for (i
= 0; i
< NUM_FPU_REGS
&& count
>= sizeof(elf_fpreg_t
); i
++) {
490 err
= user_regset_copyin(&pos
, &count
, &kbuf
, &ubuf
,
491 &fpr_val
, i
* sizeof(elf_fpreg_t
),
492 (i
+ 1) * sizeof(elf_fpreg_t
));
495 set_fpr64(&target
->thread
.fpu
.fpr
[i
], 0, fpr_val
);
506 struct pt_regs_offset
{
511 #define REG_OFFSET_NAME(reg, r) { \
513 .offset = offsetof(struct pt_regs, r) \
516 #define REG_OFFSET_END { \
521 static const struct pt_regs_offset regoffset_table
[] = {
522 REG_OFFSET_NAME(r0
, regs
[0]),
523 REG_OFFSET_NAME(r1
, regs
[1]),
524 REG_OFFSET_NAME(r2
, regs
[2]),
525 REG_OFFSET_NAME(r3
, regs
[3]),
526 REG_OFFSET_NAME(r4
, regs
[4]),
527 REG_OFFSET_NAME(r5
, regs
[5]),
528 REG_OFFSET_NAME(r6
, regs
[6]),
529 REG_OFFSET_NAME(r7
, regs
[7]),
530 REG_OFFSET_NAME(r8
, regs
[8]),
531 REG_OFFSET_NAME(r9
, regs
[9]),
532 REG_OFFSET_NAME(r10
, regs
[10]),
533 REG_OFFSET_NAME(r11
, regs
[11]),
534 REG_OFFSET_NAME(r12
, regs
[12]),
535 REG_OFFSET_NAME(r13
, regs
[13]),
536 REG_OFFSET_NAME(r14
, regs
[14]),
537 REG_OFFSET_NAME(r15
, regs
[15]),
538 REG_OFFSET_NAME(r16
, regs
[16]),
539 REG_OFFSET_NAME(r17
, regs
[17]),
540 REG_OFFSET_NAME(r18
, regs
[18]),
541 REG_OFFSET_NAME(r19
, regs
[19]),
542 REG_OFFSET_NAME(r20
, regs
[20]),
543 REG_OFFSET_NAME(r21
, regs
[21]),
544 REG_OFFSET_NAME(r22
, regs
[22]),
545 REG_OFFSET_NAME(r23
, regs
[23]),
546 REG_OFFSET_NAME(r24
, regs
[24]),
547 REG_OFFSET_NAME(r25
, regs
[25]),
548 REG_OFFSET_NAME(r26
, regs
[26]),
549 REG_OFFSET_NAME(r27
, regs
[27]),
550 REG_OFFSET_NAME(r28
, regs
[28]),
551 REG_OFFSET_NAME(r29
, regs
[29]),
552 REG_OFFSET_NAME(r30
, regs
[30]),
553 REG_OFFSET_NAME(r31
, regs
[31]),
554 REG_OFFSET_NAME(c0_status
, cp0_status
),
555 REG_OFFSET_NAME(hi
, hi
),
556 REG_OFFSET_NAME(lo
, lo
),
557 #ifdef CONFIG_CPU_HAS_SMARTMIPS
558 REG_OFFSET_NAME(acx
, acx
),
560 REG_OFFSET_NAME(c0_badvaddr
, cp0_badvaddr
),
561 REG_OFFSET_NAME(c0_cause
, cp0_cause
),
562 REG_OFFSET_NAME(c0_epc
, cp0_epc
),
563 #ifdef CONFIG_CPU_CAVIUM_OCTEON
564 REG_OFFSET_NAME(mpl0
, mpl
[0]),
565 REG_OFFSET_NAME(mpl1
, mpl
[1]),
566 REG_OFFSET_NAME(mpl2
, mpl
[2]),
567 REG_OFFSET_NAME(mtp0
, mtp
[0]),
568 REG_OFFSET_NAME(mtp1
, mtp
[1]),
569 REG_OFFSET_NAME(mtp2
, mtp
[2]),
575 * regs_query_register_offset() - query register offset from its name
576 * @name: the name of a register
578 * regs_query_register_offset() returns the offset of a register in struct
579 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
581 int regs_query_register_offset(const char *name
)
583 const struct pt_regs_offset
*roff
;
584 for (roff
= regoffset_table
; roff
->name
!= NULL
; roff
++)
585 if (!strcmp(roff
->name
, name
))
590 #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
592 static const struct user_regset mips_regsets
[] = {
594 .core_note_type
= NT_PRSTATUS
,
596 .size
= sizeof(unsigned int),
597 .align
= sizeof(unsigned int),
602 .core_note_type
= NT_PRFPREG
,
604 .size
= sizeof(elf_fpreg_t
),
605 .align
= sizeof(elf_fpreg_t
),
611 static const struct user_regset_view user_mips_view
= {
613 .e_machine
= ELF_ARCH
,
614 .ei_osabi
= ELF_OSABI
,
615 .regsets
= mips_regsets
,
616 .n
= ARRAY_SIZE(mips_regsets
),
619 #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
623 static const struct user_regset mips64_regsets
[] = {
625 .core_note_type
= NT_PRSTATUS
,
627 .size
= sizeof(unsigned long),
628 .align
= sizeof(unsigned long),
633 .core_note_type
= NT_PRFPREG
,
635 .size
= sizeof(elf_fpreg_t
),
636 .align
= sizeof(elf_fpreg_t
),
642 static const struct user_regset_view user_mips64_view
= {
644 .e_machine
= ELF_ARCH
,
645 .ei_osabi
= ELF_OSABI
,
646 .regsets
= mips64_regsets
,
647 .n
= ARRAY_SIZE(mips64_regsets
),
650 #endif /* CONFIG_64BIT */
652 const struct user_regset_view
*task_user_regset_view(struct task_struct
*task
)
655 return &user_mips_view
;
657 #ifdef CONFIG_MIPS32_O32
658 if (test_tsk_thread_flag(task
, TIF_32BIT_REGS
))
659 return &user_mips_view
;
661 return &user_mips64_view
;
665 long arch_ptrace(struct task_struct
*child
, long request
,
666 unsigned long addr
, unsigned long data
)
669 void __user
*addrp
= (void __user
*) addr
;
670 void __user
*datavp
= (void __user
*) data
;
671 unsigned long __user
*datalp
= (void __user
*) data
;
674 /* when I and D space are separate, these will need to be fixed. */
675 case PTRACE_PEEKTEXT
: /* read word at location addr. */
676 case PTRACE_PEEKDATA
:
677 ret
= generic_ptrace_peekdata(child
, addr
, data
);
680 /* Read the word at location addr in the USER area. */
681 case PTRACE_PEEKUSR
: {
682 struct pt_regs
*regs
;
684 unsigned long tmp
= 0;
686 regs
= task_pt_regs(child
);
687 ret
= 0; /* Default return value. */
691 tmp
= regs
->regs
[addr
];
693 case FPR_BASE
... FPR_BASE
+ 31:
694 if (!tsk_used_math(child
)) {
695 /* FP not yet used */
699 fregs
= get_fpu_regs(child
);
702 if (test_thread_flag(TIF_32BIT_FPREGS
)) {
704 * The odd registers are actually the high
705 * order bits of the values stored in the even
706 * registers - unless we're using r2k_switch.S.
708 tmp
= get_fpr32(&fregs
[(addr
& ~1) - FPR_BASE
],
713 tmp
= get_fpr32(&fregs
[addr
- FPR_BASE
], 0);
719 tmp
= regs
->cp0_cause
;
722 tmp
= regs
->cp0_badvaddr
;
730 #ifdef CONFIG_CPU_HAS_SMARTMIPS
736 tmp
= child
->thread
.fpu
.fcr31
;
739 /* implementation / version register */
740 tmp
= boot_cpu_data
.fpu_id
;
742 case DSP_BASE
... DSP_BASE
+ 5: {
750 dregs
= __get_dsp_regs(child
);
751 tmp
= (unsigned long) (dregs
[addr
- DSP_BASE
]);
760 tmp
= child
->thread
.dsp
.dspcontrol
;
767 ret
= put_user(tmp
, datalp
);
771 /* when I and D space are separate, this will have to be fixed. */
772 case PTRACE_POKETEXT
: /* write the word at location addr. */
773 case PTRACE_POKEDATA
:
774 ret
= generic_ptrace_pokedata(child
, addr
, data
);
777 case PTRACE_POKEUSR
: {
778 struct pt_regs
*regs
;
780 regs
= task_pt_regs(child
);
784 regs
->regs
[addr
] = data
;
786 case FPR_BASE
... FPR_BASE
+ 31: {
787 union fpureg
*fregs
= get_fpu_regs(child
);
791 if (test_thread_flag(TIF_32BIT_FPREGS
)) {
793 * The odd registers are actually the high
794 * order bits of the values stored in the even
795 * registers - unless we're using r2k_switch.S.
797 set_fpr32(&fregs
[(addr
& ~1) - FPR_BASE
],
802 set_fpr64(&fregs
[addr
- FPR_BASE
], 0, data
);
806 regs
->cp0_epc
= data
;
814 #ifdef CONFIG_CPU_HAS_SMARTMIPS
821 ptrace_setfcr31(child
, data
);
823 case DSP_BASE
... DSP_BASE
+ 5: {
831 dregs
= __get_dsp_regs(child
);
832 dregs
[addr
- DSP_BASE
] = data
;
840 child
->thread
.dsp
.dspcontrol
= data
;
843 /* The rest are not allowed. */
851 ret
= ptrace_getregs(child
, datavp
);
855 ret
= ptrace_setregs(child
, datavp
);
858 case PTRACE_GETFPREGS
:
859 ret
= ptrace_getfpregs(child
, datavp
);
862 case PTRACE_SETFPREGS
:
863 ret
= ptrace_setfpregs(child
, datavp
);
866 case PTRACE_GET_THREAD_AREA
:
867 ret
= put_user(task_thread_info(child
)->tp_value
, datalp
);
870 case PTRACE_GET_WATCH_REGS
:
871 ret
= ptrace_get_watch_regs(child
, addrp
);
874 case PTRACE_SET_WATCH_REGS
:
875 ret
= ptrace_set_watch_regs(child
, addrp
);
879 ret
= ptrace_request(child
, request
, addr
, data
);
887 * Notification of system call entry/exit
888 * - triggered by current->work.syscall_trace
890 asmlinkage
long syscall_trace_enter(struct pt_regs
*regs
, long syscall
)
894 current_thread_info()->syscall
= syscall
;
896 if (test_thread_flag(TIF_SYSCALL_TRACE
) &&
897 tracehook_report_syscall_entry(regs
))
900 if (secure_computing(NULL
) == -1)
903 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT
)))
904 trace_sys_enter(regs
, regs
->regs
[2]);
906 audit_syscall_entry(syscall
, regs
->regs
[4], regs
->regs
[5],
907 regs
->regs
[6], regs
->regs
[7]);
912 * Notification of system call entry/exit
913 * - triggered by current->work.syscall_trace
915 asmlinkage
void syscall_trace_leave(struct pt_regs
*regs
)
918 * We may come here right after calling schedule_user()
919 * or do_notify_resume(), in which case we can be in RCU
924 audit_syscall_exit(regs
);
926 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT
)))
927 trace_sys_exit(regs
, regs
->regs
[2]);
929 if (test_thread_flag(TIF_SYSCALL_TRACE
))
930 tracehook_report_syscall_exit(regs
, 0);