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/kernel.h>
19 #include <linux/sched.h>
21 #include <linux/errno.h>
22 #include <linux/ptrace.h>
23 #include <linux/smp.h>
24 #include <linux/smp_lock.h>
25 #include <linux/user.h>
26 #include <linux/security.h>
31 #include <asm/mipsregs.h>
32 #include <asm/mipsmtregs.h>
33 #include <asm/pgtable.h>
35 #include <asm/system.h>
36 #include <asm/uaccess.h>
37 #include <asm/bootinfo.h>
39 int ptrace_getregs (struct task_struct
*child
, __s64 __user
*data
);
40 int ptrace_setregs (struct task_struct
*child
, __s64 __user
*data
);
42 int ptrace_getfpregs (struct task_struct
*child
, __u32 __user
*data
);
43 int ptrace_setfpregs (struct task_struct
*child
, __u32 __user
*data
);
46 * Tracing a 32-bit process with a 64-bit strace and vice versa will not
47 * work. I don't know how to fix this.
49 asmlinkage
int sys32_ptrace(int request
, int pid
, int addr
, int data
)
51 struct task_struct
*child
;
55 printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
56 (int) request
, (int) pid
, (unsigned long) addr
,
57 (unsigned long) data
);
60 if (request
== PTRACE_TRACEME
) {
61 ret
= ptrace_traceme();
65 child
= ptrace_get_task_struct(pid
);
71 if (request
== PTRACE_ATTACH
) {
72 ret
= ptrace_attach(child
);
76 ret
= ptrace_check_attach(child
, request
== PTRACE_KILL
);
81 /* when I and D space are separate, these will need to be fixed. */
82 case PTRACE_PEEKTEXT
: /* read word at location addr. */
83 case PTRACE_PEEKDATA
: {
87 copied
= access_process_vm(child
, addr
, &tmp
, sizeof(tmp
), 0);
89 if (copied
!= sizeof(tmp
))
91 ret
= put_user(tmp
, (unsigned int *) (unsigned long) data
);
96 * Read 4 bytes of the other process' storage
97 * data is a pointer specifying where the user wants the
99 * addr is a pointer in the user's storage that contains an 8 byte
100 * address in the other process of the 4 bytes that is to be read
101 * (this is run in a 32-bit process looking at a 64-bit process)
102 * when I and D space are separate, these will need to be fixed.
104 case PTRACE_PEEKTEXT_3264
:
105 case PTRACE_PEEKDATA_3264
: {
108 u32 __user
* addrOthers
;
112 /* Get the addr in the other process that we want to read */
113 if (get_user(addrOthers
, (u32 __user
* __user
*) (unsigned long) addr
) != 0)
116 copied
= access_process_vm(child
, (u64
)addrOthers
, &tmp
,
118 if (copied
!= sizeof(tmp
))
120 ret
= put_user(tmp
, (u32 __user
*) (unsigned long) data
);
124 /* Read the word at location addr in the USER area. */
125 case PTRACE_PEEKUSR
: {
126 struct pt_regs
*regs
;
129 regs
= (struct pt_regs
*) ((unsigned long) child
->thread_info
+
130 THREAD_SIZE
- 32 - sizeof(struct pt_regs
));
131 ret
= 0; /* Default return value. */
135 tmp
= regs
->regs
[addr
];
137 case FPR_BASE
... FPR_BASE
+ 31:
138 if (tsk_used_math(child
)) {
139 fpureg_t
*fregs
= get_fpu_regs(child
);
142 * The odd registers are actually the high
143 * order bits of the values stored in the even
144 * registers - unless we're using r2k_switch.S.
147 tmp
= (unsigned long) (fregs
[((addr
& ~1) - 32)] >> 32);
149 tmp
= (unsigned long) (fregs
[(addr
- 32)] & 0xffffffff);
151 tmp
= -1; /* FP not yet used */
158 tmp
= regs
->cp0_cause
;
161 tmp
= regs
->cp0_badvaddr
;
171 tmp
= child
->thread
.fpu
.hard
.fcr31
;
173 tmp
= child
->thread
.fpu
.soft
.fcr31
;
175 case FPC_EIR
: { /* implementation / version register */
182 if (cpu_has_mipsmt
) {
183 unsigned int vpflags
= dvpe();
184 flags
= read_c0_status();
186 __asm__
__volatile__("cfc1\t%0,$0": "=r" (tmp
));
187 write_c0_status(flags
);
190 flags
= read_c0_status();
192 __asm__
__volatile__("cfc1\t%0,$0": "=r" (tmp
));
193 write_c0_status(flags
);
198 case DSP_BASE
... DSP_BASE
+ 5:
204 dspreg_t
*dregs
= __get_dsp_regs(child
);
205 tmp
= (unsigned long) (dregs
[addr
- DSP_BASE
]);
213 tmp
= child
->thread
.dsp
.dspcontrol
;
220 ret
= put_user(tmp
, (unsigned *) (unsigned long) data
);
224 /* when I and D space are separate, this will have to be fixed. */
225 case PTRACE_POKETEXT
: /* write the word at location addr. */
226 case PTRACE_POKEDATA
:
228 if (access_process_vm(child
, addr
, &data
, sizeof(data
), 1)
235 * Write 4 bytes into the other process' storage
236 * data is the 4 bytes that the user wants written
237 * addr is a pointer in the user's storage that contains an
238 * 8 byte address in the other process where the 4 bytes
239 * that is to be written
240 * (this is run in a 32-bit process looking at a 64-bit process)
241 * when I and D space are separate, these will need to be fixed.
243 case PTRACE_POKETEXT_3264
:
244 case PTRACE_POKEDATA_3264
: {
245 u32 __user
* addrOthers
;
247 /* Get the addr in the other process that we want to write into */
249 if (get_user(addrOthers
, (u32 __user
* __user
*) (unsigned long) addr
) != 0)
252 if (access_process_vm(child
, (u64
)addrOthers
, &data
,
253 sizeof(data
), 1) == sizeof(data
))
259 case PTRACE_POKEUSR
: {
260 struct pt_regs
*regs
;
262 regs
= (struct pt_regs
*) ((unsigned long) child
->thread_info
+
263 THREAD_SIZE
- 32 - sizeof(struct pt_regs
));
267 regs
->regs
[addr
] = data
;
269 case FPR_BASE
... FPR_BASE
+ 31: {
270 fpureg_t
*fregs
= get_fpu_regs(child
);
272 if (!tsk_used_math(child
)) {
273 /* FP not yet used */
274 memset(&child
->thread
.fpu
.hard
, ~0,
275 sizeof(child
->thread
.fpu
.hard
));
276 child
->thread
.fpu
.hard
.fcr31
= 0;
279 * The odd registers are actually the high order bits
280 * of the values stored in the even registers - unless
281 * we're using r2k_switch.S.
284 fregs
[(addr
& ~1) - FPR_BASE
] &= 0xffffffff;
285 fregs
[(addr
& ~1) - FPR_BASE
] |= ((unsigned long long) data
) << 32;
287 fregs
[addr
- FPR_BASE
] &= ~0xffffffffLL
;
288 /* Must cast, lest sign extension fill upper
290 fregs
[addr
- FPR_BASE
] |= (unsigned int)data
;
295 regs
->cp0_epc
= data
;
305 child
->thread
.fpu
.hard
.fcr31
= data
;
307 child
->thread
.fpu
.soft
.fcr31
= data
;
309 case DSP_BASE
... DSP_BASE
+ 5:
315 dspreg_t
*dregs
= __get_dsp_regs(child
);
316 dregs
[addr
- DSP_BASE
] = data
;
323 child
->thread
.dsp
.dspcontrol
= data
;
326 /* The rest are not allowed. */
334 ret
= ptrace_getregs (child
, (__u64 __user
*) (__u64
) data
);
338 ret
= ptrace_setregs (child
, (__u64 __user
*) (__u64
) data
);
341 case PTRACE_GETFPREGS
:
342 ret
= ptrace_getfpregs (child
, (__u32 __user
*) (__u64
) data
);
345 case PTRACE_SETFPREGS
:
346 ret
= ptrace_setfpregs (child
, (__u32 __user
*) (__u64
) data
);
349 case PTRACE_SYSCALL
: /* continue and stop at next (return from) syscall */
350 case PTRACE_CONT
: { /* restart after signal. */
352 if (!valid_signal(data
))
354 if (request
== PTRACE_SYSCALL
) {
355 set_tsk_thread_flag(child
, TIF_SYSCALL_TRACE
);
358 clear_tsk_thread_flag(child
, TIF_SYSCALL_TRACE
);
360 child
->exit_code
= data
;
361 wake_up_process(child
);
367 * make the child exit. Best I can do is send it a sigkill.
368 * perhaps it should be put in the status that it wants to
373 if (child
->exit_state
== EXIT_ZOMBIE
) /* already dead */
375 child
->exit_code
= SIGKILL
;
376 wake_up_process(child
);
379 case PTRACE_GET_THREAD_AREA
:
380 ret
= put_user(child
->thread_info
->tp_value
,
381 (unsigned int __user
*) (unsigned long) data
);
384 case PTRACE_DETACH
: /* detach a process that was attached. */
385 ret
= ptrace_detach(child
, data
);
388 case PTRACE_GETEVENTMSG
:
389 ret
= put_user(child
->ptrace_message
,
390 (unsigned int __user
*) (unsigned long) data
);
393 case PTRACE_GET_THREAD_AREA_3264
:
394 ret
= put_user(child
->thread_info
->tp_value
,
395 (unsigned long __user
*) (unsigned long) data
);
399 ret
= ptrace_request(child
, request
, addr
, data
);
404 put_task_struct(child
);