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authorChristoph Hellwig <hch@lst.de>2005-11-07 03:59:47 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:42 -0500
commit481bed454247538e9f57d4ea37b153ccba24ba7b (patch)
treebb4198296962c08dbf52e8f377dc27206f621640
parentdb73e9aa99bf093427b79877f9475392724fd5e5 (diff)
[PATCH] consolidate sys_ptrace()
The sys_ptrace boilerplate code (everything outside the big switch statement for the arch-specific requests) is shared by most architectures. This patch moves it to kernel/ptrace.c and leaves the arch-specific code as arch_ptrace. Some architectures have a too different ptrace so we have to exclude them. They continue to keep their implementations. For sh64 I had to add a sh64_ptrace wrapper because it does some initialization on the first call. For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-By: David Howells <dhowells@redhat.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat
-rw-r--r--arch/arm/kernel/ptrace.c49
-rw-r--r--arch/arm26/kernel/ptrace.c49
-rw-r--r--arch/cris/arch-v10/kernel/ptrace.c51
-rw-r--r--arch/cris/arch-v32/kernel/ptrace.c51
-rw-r--r--arch/frv/kernel/ptrace.c43
-rw-r--r--arch/h8300/kernel/ptrace.c39
-rw-r--r--arch/i386/kernel/ptrace.c44
-rw-r--r--arch/m68k/kernel/ptrace.c47
-rw-r--r--arch/m68knommu/kernel/ptrace.c39
-rw-r--r--arch/mips/kernel/ptrace.c55
-rw-r--r--arch/parisc/kernel/ptrace.c50
-rw-r--r--arch/powerpc/kernel/ptrace.c43
-rw-r--r--arch/sh/kernel/ptrace.c44
-rw-r--r--arch/sh64/kernel/ptrace.c83
-rw-r--r--arch/sh64/kernel/syscalls.S2
-rw-r--r--arch/um/kernel/ptrace.c50
-rw-r--r--arch/v850/kernel/ptrace.c43
-rw-r--r--arch/x86_64/kernel/ptrace.c43
-rw-r--r--arch/xtensa/kernel/ptrace.c55
-rw-r--r--include/asm-alpha/ptrace.h3
-rw-r--r--include/asm-ia64/ptrace.h3
-rw-r--r--include/asm-m32r/ptrace.h3
-rw-r--r--include/asm-s390/ptrace.h2
-rw-r--r--include/asm-sparc/ptrace.h3
-rw-r--r--include/asm-sparc64/ptrace.h3
-rw-r--r--include/linux/ptrace.h2
-rw-r--r--kernel/ptrace.c82
27 files changed, 163 insertions, 818 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 9bd8609a2926..9a340e790da5 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -648,7 +648,7 @@ static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp)
648 648
649#endif 649#endif
650 650
651static int do_ptrace(int request, struct task_struct *child, long addr, long data) 651long arch_ptrace(struct task_struct *child, long request, long addr, long data)
652{ 652{
653 unsigned long tmp; 653 unsigned long tmp;
654 int ret; 654 int ret;
@@ -782,53 +782,6 @@ static int do_ptrace(int request, struct task_struct *child, long addr, long dat
782 return ret; 782 return ret;
783} 783}
784 784
785asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
786{
787 struct task_struct *child;
788 int ret;
789
790 lock_kernel();
791 ret = -EPERM;
792 if (request == PTRACE_TRACEME) {
793 /* are we already being traced? */
794 if (current->ptrace & PT_PTRACED)
795 goto out;
796 ret = security_ptrace(current->parent, current);
797 if (ret)
798 goto out;
799 /* set the ptrace bit in the process flags. */
800 current->ptrace |= PT_PTRACED;
801 ret = 0;
802 goto out;
803 }
804 ret = -ESRCH;
805 read_lock(&tasklist_lock);
806 child = find_task_by_pid(pid);
807 if (child)
808 get_task_struct(child);
809 read_unlock(&tasklist_lock);
810 if (!child)
811 goto out;
812
813 ret = -EPERM;
814 if (pid == 1) /* you may not mess with init */
815 goto out_tsk;
816
817 if (request == PTRACE_ATTACH) {
818 ret = ptrace_attach(child);
819 goto out_tsk;
820 }
821 ret = ptrace_check_attach(child, request == PTRACE_KILL);
822 if (ret == 0)
823 ret = do_ptrace(request, child, addr, data);
824
825out_tsk:
826 put_task_struct(child);
827out:
828 unlock_kernel();
829 return ret;
830}
831
832asmlinkage void syscall_trace(int why, struct pt_regs *regs) 785asmlinkage void syscall_trace(int why, struct pt_regs *regs)
833{ 786{
834 unsigned long ip; 787 unsigned long ip;
diff --git a/arch/arm26/kernel/ptrace.c b/arch/arm26/kernel/ptrace.c
index cf7e977d18c8..4e6b7356a722 100644
--- a/arch/arm26/kernel/ptrace.c
+++ b/arch/arm26/kernel/ptrace.c
@@ -546,7 +546,7 @@ static int ptrace_setfpregs(struct task_struct *tsk, void *ufp)
546 sizeof(struct user_fp)) ? -EFAULT : 0; 546 sizeof(struct user_fp)) ? -EFAULT : 0;
547} 547}
548 548
549static int do_ptrace(int request, struct task_struct *child, long addr, long data) 549long arch_ptrace(struct task_struct *child, long request, long addr, long data)
550{ 550{
551 unsigned long tmp; 551 unsigned long tmp;
552 int ret; 552 int ret;
@@ -665,53 +665,6 @@ static int do_ptrace(int request, struct task_struct *child, long addr, long dat
665 return ret; 665 return ret;
666} 666}
667 667
668asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
669{
670 struct task_struct *child;
671 int ret;
672
673 lock_kernel();
674 ret = -EPERM;
675 if (request == PTRACE_TRACEME) {
676 /* are we already being traced? */
677 if (current->ptrace & PT_PTRACED)
678 goto out;
679 ret = security_ptrace(current->parent, current);
680 if (ret)
681 goto out;
682 /* set the ptrace bit in the process flags. */
683 current->ptrace |= PT_PTRACED;
684 ret = 0;
685 goto out;
686 }
687 ret = -ESRCH;
688 read_lock(&tasklist_lock);
689 child = find_task_by_pid(pid);
690 if (child)
691 get_task_struct(child);
692 read_unlock(&tasklist_lock);
693 if (!child)
694 goto out;
695
696 ret = -EPERM;
697 if (pid == 1) /* you may not mess with init */
698 goto out_tsk;
699
700 if (request == PTRACE_ATTACH) {
701 ret = ptrace_attach(child);
702 goto out_tsk;
703 }
704 ret = ptrace_check_attach(child, request == PTRACE_KILL);
705 if (ret == 0)
706 ret = do_ptrace(request, child, addr, data);
707
708out_tsk:
709 put_task_struct(child);
710out:
711 unlock_kernel();
712 return ret;
713}
714
715asmlinkage void syscall_trace(int why, struct pt_regs *regs) 668asmlinkage void syscall_trace(int why, struct pt_regs *regs)
716{ 669{
717 unsigned long ip; 670 unsigned long ip;
diff --git a/arch/cris/arch-v10/kernel/ptrace.c b/arch/cris/arch-v10/kernel/ptrace.c
index 130dd214e41d..6cbd34a27b90 100644
--- a/arch/cris/arch-v10/kernel/ptrace.c
+++ b/arch/cris/arch-v10/kernel/ptrace.c
@@ -76,55 +76,11 @@ ptrace_disable(struct task_struct *child)
76 * (in user space) where the result of the ptrace call is written (instead of 76 * (in user space) where the result of the ptrace call is written (instead of
77 * being returned). 77 * being returned).
78 */ 78 */
79asmlinkage int 79long arch_ptrace(struct task_struct *child, long request, long addr, long data)
80sys_ptrace(long request, long pid, long addr, long data)
81{ 80{
82 struct task_struct *child;
83 int ret; 81 int ret;
84 unsigned long __user *datap = (unsigned long __user *)data; 82 unsigned long __user *datap = (unsigned long __user *)data;
85 83
86 lock_kernel();
87 ret = -EPERM;
88
89 if (request == PTRACE_TRACEME) {
90 /* are we already being traced? */
91 if (current->ptrace & PT_PTRACED)
92 goto out;
93 ret = security_ptrace(current->parent, current);
94 if (ret)
95 goto out;
96 /* set the ptrace bit in the process flags. */
97 current->ptrace |= PT_PTRACED;
98 ret = 0;
99 goto out;
100 }
101
102 ret = -ESRCH;
103 read_lock(&tasklist_lock);
104 child = find_task_by_pid(pid);
105
106 if (child)
107 get_task_struct(child);
108
109 read_unlock(&tasklist_lock);
110
111 if (!child)
112 goto out;
113
114 ret = -EPERM;
115
116 if (pid == 1) /* Leave the init process alone! */
117 goto out_tsk;
118
119 if (request == PTRACE_ATTACH) {
120 ret = ptrace_attach(child);
121 goto out_tsk;
122 }
123
124 ret = ptrace_check_attach(child, request == PTRACE_KILL);
125 if (ret < 0)
126 goto out_tsk;
127
128 switch (request) { 84 switch (request) {
129 /* Read word at location address. */ 85 /* Read word at location address. */
130 case PTRACE_PEEKTEXT: 86 case PTRACE_PEEKTEXT:
@@ -289,10 +245,7 @@ sys_ptrace(long request, long pid, long addr, long data)
289 ret = ptrace_request(child, request, addr, data); 245 ret = ptrace_request(child, request, addr, data);
290 break; 246 break;
291 } 247 }
292out_tsk: 248
293 put_task_struct(child);
294out:
295 unlock_kernel();
296 return ret; 249 return ret;
297} 250}
298 251
diff --git a/arch/cris/arch-v32/kernel/ptrace.c b/arch/cris/arch-v32/kernel/ptrace.c
index 208489da2a87..5528b83a622b 100644
--- a/arch/cris/arch-v32/kernel/ptrace.c
+++ b/arch/cris/arch-v32/kernel/ptrace.c
@@ -99,55 +99,11 @@ ptrace_disable(struct task_struct *child)
99} 99}
100 100
101 101
102asmlinkage int 102long arch_ptrace(struct task_struct *child, long request, long addr, long data)
103sys_ptrace(long request, long pid, long addr, long data)
104{ 103{
105 struct task_struct *child;
106 int ret; 104 int ret;
107 unsigned long __user *datap = (unsigned long __user *)data; 105 unsigned long __user *datap = (unsigned long __user *)data;
108 106
109 lock_kernel();
110 ret = -EPERM;
111
112 if (request == PTRACE_TRACEME) {
113 /* are we already being traced? */
114 if (current->ptrace & PT_PTRACED)
115 goto out;
116 ret = security_ptrace(current->parent, current);
117 if (ret)
118 goto out;
119 /* set the ptrace bit in the process flags. */
120 current->ptrace |= PT_PTRACED;
121 ret = 0;
122 goto out;
123 }
124
125 ret = -ESRCH;
126 read_lock(&tasklist_lock);
127 child = find_task_by_pid(pid);
128
129 if (child)
130 get_task_struct(child);
131
132 read_unlock(&tasklist_lock);
133
134 if (!child)
135 goto out;
136
137 ret = -EPERM;
138
139 if (pid == 1) /* Leave the init process alone! */
140 goto out_tsk;
141
142 if (request == PTRACE_ATTACH) {
143 ret = ptrace_attach(child);
144 goto out_tsk;
145 }
146
147 ret = ptrace_check_attach(child, request == PTRACE_KILL);
148 if (ret < 0)
149 goto out_tsk;
150
151 switch (request) { 107 switch (request) {
152 /* Read word at location address. */ 108 /* Read word at location address. */
153 case PTRACE_PEEKTEXT: 109 case PTRACE_PEEKTEXT:
@@ -347,10 +303,7 @@ sys_ptrace(long request, long pid, long addr, long data)
347 ret = ptrace_request(child, request, addr, data); 303 ret = ptrace_request(child, request, addr, data);
348 break; 304 break;
349 } 305 }
350out_tsk: 306
351 put_task_struct(child);
352out:
353 unlock_kernel();
354 return ret; 307 return ret;
355} 308}
356 309
diff --git a/arch/frv/kernel/ptrace.c b/arch/frv/kernel/ptrace.c
index cb335a14a315..f953484e7d59 100644
--- a/arch/frv/kernel/ptrace.c
+++ b/arch/frv/kernel/ptrace.c
@@ -106,48 +106,11 @@ void ptrace_enable(struct task_struct *child)
106 child->thread.frame0->__status |= REG__STATUS_STEP; 106 child->thread.frame0->__status |= REG__STATUS_STEP;
107} 107}
108 108
109asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 109long arch_ptrace(struct task_struct *child, long request, long addr, long data)
110{ 110{
111 struct task_struct *child;
112 unsigned long tmp; 111 unsigned long tmp;
113 int ret; 112 int ret;
114 113
115 lock_kernel();
116 ret = -EPERM;
117 if (request == PTRACE_TRACEME) {
118 /* are we already being traced? */
119 if (current->ptrace & PT_PTRACED)
120 goto out;
121 ret = security_ptrace(current->parent, current);
122 if (ret)
123 goto out;
124 /* set the ptrace bit in the process flags. */
125 current->ptrace |= PT_PTRACED;
126 ret = 0;
127 goto out;
128 }
129 ret = -ESRCH;
130 read_lock(&tasklist_lock);
131 child = find_task_by_pid(pid);
132 if (child)
133 get_task_struct(child);
134 read_unlock(&tasklist_lock);
135 if (!child)
136 goto out;
137
138 ret = -EPERM;
139 if (pid == 1) /* you may not mess with init */
140 goto out_tsk;
141
142 if (request == PTRACE_ATTACH) {
143 ret = ptrace_attach(child);
144 goto out_tsk;
145 }
146
147 ret = ptrace_check_attach(child, request == PTRACE_KILL);
148 if (ret < 0)
149 goto out_tsk;
150
151 switch (request) { 114 switch (request) {
152 /* when I and D space are separate, these will need to be fixed. */ 115 /* when I and D space are separate, these will need to be fixed. */
153 case PTRACE_PEEKTEXT: /* read word at location addr. */ 116 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -351,10 +314,6 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
351 ret = -EIO; 314 ret = -EIO;
352 break; 315 break;
353 } 316 }
354out_tsk:
355 put_task_struct(child);
356out:
357 unlock_kernel();
358 return ret; 317 return ret;
359} 318}
360 319
diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c
index a569fe4aa284..0ff6f79b0fed 100644
--- a/arch/h8300/kernel/ptrace.c
+++ b/arch/h8300/kernel/ptrace.c
@@ -57,43 +57,10 @@ void ptrace_disable(struct task_struct *child)
57 h8300_disable_trace(child); 57 h8300_disable_trace(child);
58} 58}
59 59
60asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 60long arch_ptrace(struct task_struct *child, long request, long addr, long data)
61{ 61{
62 struct task_struct *child;
63 int ret; 62 int ret;
64 63
65 lock_kernel();
66 ret = -EPERM;
67 if (request == PTRACE_TRACEME) {
68 /* are we already being traced? */
69 if (current->ptrace & PT_PTRACED)
70 goto out;
71 /* set the ptrace bit in the process flags. */
72 current->ptrace |= PT_PTRACED;
73 ret = 0;
74 goto out;
75 }
76 ret = -ESRCH;
77 read_lock(&tasklist_lock);
78 child = find_task_by_pid(pid);
79 if (child)
80 get_task_struct(child);
81 read_unlock(&tasklist_lock);
82 if (!child)
83 goto out;
84
85 ret = -EPERM;
86 if (pid == 1) /* you may not mess with init */
87 goto out_tsk;
88
89 if (request == PTRACE_ATTACH) {
90 ret = ptrace_attach(child);
91 goto out_tsk;
92 }
93 ret = ptrace_check_attach(child, request == PTRACE_KILL);
94 if (ret < 0)
95 goto out_tsk;
96
97 switch (request) { 64 switch (request) {
98 case PTRACE_PEEKTEXT: /* read word at location addr. */ 65 case PTRACE_PEEKTEXT: /* read word at location addr. */
99 case PTRACE_PEEKDATA: { 66 case PTRACE_PEEKDATA: {
@@ -251,10 +218,6 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
251 ret = -EIO; 218 ret = -EIO;
252 break; 219 break;
253 } 220 }
254out_tsk:
255 put_task_struct(child);
256out:
257 unlock_kernel();
258 return ret; 221 return ret;
259} 222}
260 223
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index efd11f09c996..5ffbb4b7ad05 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -354,49 +354,12 @@ ptrace_set_thread_area(struct task_struct *child,
354 return 0; 354 return 0;
355} 355}
356 356
357asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 357long arch_ptrace(struct task_struct *child, long request, long addr, long data)
358{ 358{
359 struct task_struct *child;
360 struct user * dummy = NULL; 359 struct user * dummy = NULL;
361 int i, ret; 360 int i, ret;
362 unsigned long __user *datap = (unsigned long __user *)data; 361 unsigned long __user *datap = (unsigned long __user *)data;
363 362
364 lock_kernel();
365 ret = -EPERM;
366 if (request == PTRACE_TRACEME) {
367 /* are we already being traced? */
368 if (current->ptrace & PT_PTRACED)
369 goto out;
370 ret = security_ptrace(current->parent, current);
371 if (ret)
372 goto out;
373 /* set the ptrace bit in the process flags. */
374 current->ptrace |= PT_PTRACED;
375 ret = 0;
376 goto out;
377 }
378 ret = -ESRCH;
379 read_lock(&tasklist_lock);
380 child = find_task_by_pid(pid);
381 if (child)
382 get_task_struct(child);
383 read_unlock(&tasklist_lock);
384 if (!child)
385 goto out;
386
387 ret = -EPERM;
388 if (pid == 1) /* you may not mess with init */
389 goto out_tsk;
390
391 if (request == PTRACE_ATTACH) {
392 ret = ptrace_attach(child);
393 goto out_tsk;
394 }
395
396 ret = ptrace_check_attach(child, request == PTRACE_KILL);
397 if (ret < 0)
398 goto out_tsk;
399
400 switch (request) { 363 switch (request) {
401 /* when I and D space are separate, these will need to be fixed. */ 364 /* when I and D space are separate, these will need to be fixed. */
402 case PTRACE_PEEKTEXT: /* read word at location addr. */ 365 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -663,10 +626,7 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
663 ret = ptrace_request(child, request, addr, data); 626 ret = ptrace_request(child, request, addr, data);
664 break; 627 break;
665 } 628 }
666out_tsk: 629 out_tsk:
667 put_task_struct(child);
668out:
669 unlock_kernel();
670 return ret; 630 return ret;
671} 631}
672 632
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index f7f1d2e5b90b..7e54422685cf 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -121,48 +121,11 @@ void ptrace_disable(struct task_struct *child)
121 child->thread.work.syscall_trace = 0; 121 child->thread.work.syscall_trace = 0;
122} 122}
123 123
124asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 124long arch_ptrace(struct task_struct *child, long request, long addr, long data)
125{ 125{
126 struct task_struct *child;
127 unsigned long tmp; 126 unsigned long tmp;
128 int i, ret = 0; 127 int i, ret = 0;
129 128
130 lock_kernel();
131 if (request == PTRACE_TRACEME) {
132 /* are we already being traced? */
133 if (current->ptrace & PT_PTRACED) {
134 ret = -EPERM;
135 goto out;
136 }
137 /* set the ptrace bit in the process flags. */
138 current->ptrace |= PT_PTRACED;
139 goto out;
140 }
141 read_lock(&tasklist_lock);
142 child = find_task_by_pid(pid);
143 if (child)
144 get_task_struct(child);
145 read_unlock(&tasklist_lock);
146 if (unlikely(!child)) {
147 ret = -ESRCH;
148 goto out;
149 }
150
151 /* you may not mess with init */
152 if (unlikely(pid == 1)) {
153 ret = -EPERM;
154 goto out_tsk;
155 }
156
157 if (request == PTRACE_ATTACH) {
158 ret = ptrace_attach(child);
159 goto out_tsk;
160 }
161
162 ret = ptrace_check_attach(child, request == PTRACE_KILL);
163 if (ret)
164 goto out_tsk;
165
166 switch (request) { 129 switch (request) {
167 /* when I and D space are separate, these will need to be fixed. */ 130 /* when I and D space are separate, these will need to be fixed. */
168 case PTRACE_PEEKTEXT: /* read word at location addr. */ 131 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -317,14 +280,10 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
317 ret = ptrace_request(child, request, addr, data); 280 ret = ptrace_request(child, request, addr, data);
318 break; 281 break;
319 } 282 }
320out_tsk: 283
321 put_task_struct(child);
322out:
323 unlock_kernel();
324 return ret; 284 return ret;
325out_eio: 285out_eio:
326 ret = -EIO; 286 return -EIO;
327 goto out_tsk;
328} 287}
329 288
330asmlinkage void syscall_trace(void) 289asmlinkage void syscall_trace(void)
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
index 621d7b91ccfe..262ab8c72e5f 100644
--- a/arch/m68knommu/kernel/ptrace.c
+++ b/arch/m68knommu/kernel/ptrace.c
@@ -101,43 +101,10 @@ void ptrace_disable(struct task_struct *child)
101 put_reg(child, PT_SR, tmp); 101 put_reg(child, PT_SR, tmp);
102} 102}
103 103
104asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 104long arch_ptrace(truct task_struct *child, long request, long addr, long data)
105{ 105{
106 struct task_struct *child;
107 int ret; 106 int ret;
108 107
109 lock_kernel();
110 ret = -EPERM;
111 if (request == PTRACE_TRACEME) {
112 /* are we already being traced? */
113 if (current->ptrace & PT_PTRACED)
114 goto out;
115 /* set the ptrace bit in the process flags. */
116 current->ptrace |= PT_PTRACED;
117 ret = 0;
118 goto out;
119 }
120 ret = -ESRCH;
121 read_lock(&tasklist_lock);
122 child = find_task_by_pid(pid);
123 if (child)
124 get_task_struct(child);
125 read_unlock(&tasklist_lock);
126 if (!child)
127 goto out;
128
129 ret = -EPERM;
130 if (pid == 1) /* you may not mess with init */
131 goto out_tsk;
132
133 if (request == PTRACE_ATTACH) {
134 ret = ptrace_attach(child);
135 goto out_tsk;
136 }
137 ret = ptrace_check_attach(child, request == PTRACE_KILL);
138 if (ret < 0)
139 goto out_tsk;
140
141 switch (request) { 108 switch (request) {
142 /* when I and D space are separate, these will need to be fixed. */ 109 /* when I and D space are separate, these will need to be fixed. */
143 case PTRACE_PEEKTEXT: /* read word at location addr. */ 110 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -357,10 +324,6 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
357 ret = -EIO; 324 ret = -EIO;
358 break; 325 break;
359 } 326 }
360out_tsk:
361 put_task_struct(child);
362out:
363 unlock_kernel();
364 return ret; 327 return ret;
365} 328}
366 329
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index f1b0f3e1f95b..510da5fda567 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -174,51 +174,10 @@ int ptrace_setfpregs (struct task_struct *child, __u32 __user *data)
174 return 0; 174 return 0;
175} 175}
176 176
177asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 177long arch_ptrace(struct task_struct *child, long request, long addr, long data)
178{ 178{
179 struct task_struct *child;
180 int ret; 179 int ret;
181 180
182#if 0
183 printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
184 (int) request, (int) pid, (unsigned long) addr,
185 (unsigned long) data);
186#endif
187 lock_kernel();
188 ret = -EPERM;
189 if (request == PTRACE_TRACEME) {
190 /* are we already being traced? */
191 if (current->ptrace & PT_PTRACED)
192 goto out;
193 if ((ret = security_ptrace(current->parent, current)))
194 goto out;
195 /* set the ptrace bit in the process flags. */
196 current->ptrace |= PT_PTRACED;
197 ret = 0;
198 goto out;
199 }
200 ret = -ESRCH;
201 read_lock(&tasklist_lock);
202 child = find_task_by_pid(pid);
203 if (child)
204 get_task_struct(child);
205 read_unlock(&tasklist_lock);
206 if (!child)
207 goto out;
208
209 ret = -EPERM;
210 if (pid == 1) /* you may not mess with init */
211 goto out_tsk;
212
213 if (request == PTRACE_ATTACH) {
214 ret = ptrace_attach(child);
215 goto out_tsk;
216 }
217
218 ret = ptrace_check_attach(child, request == PTRACE_KILL);
219 if (ret < 0)
220 goto out_tsk;
221
222 switch (request) { 181 switch (request) {
223 /* when I and D space are separate, these will need to be fixed. */ 182 /* when I and D space are separate, these will need to be fixed. */
224 case PTRACE_PEEKTEXT: /* read word at location addr. */ 183 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -319,7 +278,7 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
319 if (!cpu_has_dsp) { 278 if (!cpu_has_dsp) {
320 tmp = 0; 279 tmp = 0;
321 ret = -EIO; 280 ret = -EIO;
322 goto out_tsk; 281 goto out;
323 } 282 }
324 if (child->thread.dsp.used_dsp) { 283 if (child->thread.dsp.used_dsp) {
325 dregs = __get_dsp_regs(child); 284 dregs = __get_dsp_regs(child);
@@ -333,14 +292,14 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
333 if (!cpu_has_dsp) { 292 if (!cpu_has_dsp) {
334 tmp = 0; 293 tmp = 0;
335 ret = -EIO; 294 ret = -EIO;
336 goto out_tsk; 295 goto out;
337 } 296 }
338 tmp = child->thread.dsp.dspcontrol; 297 tmp = child->thread.dsp.dspcontrol;
339 break; 298 break;
340 default: 299 default:
341 tmp = 0; 300 tmp = 0;
342 ret = -EIO; 301 ret = -EIO;
343 goto out_tsk; 302 goto out;
344 } 303 }
345 ret = put_user(tmp, (unsigned long __user *) data); 304 ret = put_user(tmp, (unsigned long __user *) data);
346 break; 305 break;
@@ -495,11 +454,7 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
495 ret = ptrace_request(child, request, addr, data); 454 ret = ptrace_request(child, request, addr, data);
496 break; 455 break;
497 } 456 }
498 457 out:
499out_tsk:
500 put_task_struct(child);
501out:
502 unlock_kernel();
503 return ret; 458 return ret;
504} 459}
505 460
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 18130c3748f3..b6fe202a620d 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -78,52 +78,13 @@ void ptrace_disable(struct task_struct *child)
78 pa_psw(child)->l = 0; 78 pa_psw(child)->l = 0;
79} 79}
80 80
81long sys_ptrace(long request, long pid, long addr, long data) 81long arch_ptrace(struct task_struct *child, long request, long addr, long data)
82{ 82{
83 struct task_struct *child;
84 long ret; 83 long ret;
85#ifdef DEBUG_PTRACE 84#ifdef DEBUG_PTRACE
86 long oaddr=addr, odata=data; 85 long oaddr=addr, odata=data;
87#endif 86#endif
88 87
89 lock_kernel();
90 ret = -EPERM;
91 if (request == PTRACE_TRACEME) {
92 /* are we already being traced? */
93 if (current->ptrace & PT_PTRACED)
94 goto out;
95
96 ret = security_ptrace(current->parent, current);
97 if (ret)
98 goto out;
99
100 /* set the ptrace bit in the process flags. */
101 current->ptrace |= PT_PTRACED;
102 ret = 0;
103 goto out;
104 }
105
106 ret = -ESRCH;
107 read_lock(&tasklist_lock);
108 child = find_task_by_pid(pid);
109 if (child)
110 get_task_struct(child);
111 read_unlock(&tasklist_lock);
112 if (!child)
113 goto out;
114 ret = -EPERM;
115 if (pid == 1) /* no messing around with init! */
116 goto out_tsk;
117
118 if (request == PTRACE_ATTACH) {
119 ret = ptrace_attach(child);
120 goto out_tsk;
121 }
122
123 ret = ptrace_check_attach(child, request == PTRACE_KILL);
124 if (ret < 0)
125 goto out_tsk;
126
127 switch (request) { 88 switch (request) {
128 case PTRACE_PEEKTEXT: /* read word at location addr. */ 89 case PTRACE_PEEKTEXT: /* read word at location addr. */
129 case PTRACE_PEEKDATA: { 90 case PTRACE_PEEKDATA: {
@@ -383,11 +344,11 @@ long sys_ptrace(long request, long pid, long addr, long data)
383 344
384 case PTRACE_GETEVENTMSG: 345 case PTRACE_GETEVENTMSG:
385 ret = put_user(child->ptrace_message, (unsigned int __user *) data); 346 ret = put_user(child->ptrace_message, (unsigned int __user *) data);
386 goto out_tsk; 347 goto out;
387 348
388 default: 349 default:
389 ret = ptrace_request(child, request, addr, data); 350 ret = ptrace_request(child, request, addr, data);
390 goto out_tsk; 351 goto out;
391 } 352 }
392 353
393out_wake_notrap: 354out_wake_notrap:
@@ -396,10 +357,7 @@ out_wake:
396 wake_up_process(child); 357 wake_up_process(child);
397 ret = 0; 358 ret = 0;
398out_tsk: 359out_tsk:
399 put_task_struct(child); 360 DBG("arch_ptrace(%ld, %d, %lx, %lx) returning %ld\n",
400out:
401 unlock_kernel();
402 DBG("sys_ptrace(%ld, %d, %lx, %lx) returning %ld\n",
403 request, pid, oaddr, odata, ret); 361 request, pid, oaddr, odata, ret);
404 return ret; 362 return ret;
405} 363}
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 568ea335d616..3d2abd95c7ae 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -248,46 +248,10 @@ void ptrace_disable(struct task_struct *child)
248 clear_single_step(child); 248 clear_single_step(child);
249} 249}
250 250
251long sys_ptrace(long request, long pid, long addr, long data) 251long arch_ptrace(struct task_struct *child, long request, long addr, long data)
252{ 252{
253 struct task_struct *child;
254 int ret = -EPERM; 253 int ret = -EPERM;
255 254
256 lock_kernel();
257 if (request == PTRACE_TRACEME) {
258 /* are we already being traced? */
259 if (current->ptrace & PT_PTRACED)
260 goto out;
261 ret = security_ptrace(current->parent, current);
262 if (ret)
263 goto out;
264 /* set the ptrace bit in the process flags. */
265 current->ptrace |= PT_PTRACED;
266 ret = 0;
267 goto out;
268 }
269 ret = -ESRCH;
270 read_lock(&tasklist_lock);
271 child = find_task_by_pid(pid);
272 if (child)
273 get_task_struct(child);
274 read_unlock(&tasklist_lock);
275 if (!child)
276 goto out;
277
278 ret = -EPERM;
279 if (pid == 1) /* you may not mess with init */
280 goto out_tsk;
281
282 if (request == PTRACE_ATTACH) {
283 ret = ptrace_attach(child);
284 goto out_tsk;
285 }
286
287 ret = ptrace_check_attach(child, request == PTRACE_KILL);
288 if (ret < 0)
289 goto out_tsk;
290
291 switch (request) { 255 switch (request) {
292 /* when I and D space are separate, these will need to be fixed. */ 256 /* when I and D space are separate, these will need to be fixed. */
293 case PTRACE_PEEKTEXT: /* read word at location addr. */ 257 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -540,10 +504,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
540 ret = ptrace_request(child, request, addr, data); 504 ret = ptrace_request(child, request, addr, data);
541 break; 505 break;
542 } 506 }
543out_tsk: 507
544 put_task_struct(child);
545out:
546 unlock_kernel();
547 return ret; 508 return ret;
548} 509}
549 510
diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index 1fbe5a428e31..1a8be06519ec 100644
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -80,48 +80,11 @@ void ptrace_disable(struct task_struct *child)
80 /* nothing to do.. */ 80 /* nothing to do.. */
81} 81}
82 82
83asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 83long arch_ptrace(struct task_struct *child, long request, long addr, long data)
84{ 84{
85 struct task_struct *child;
86 struct user * dummy = NULL; 85 struct user * dummy = NULL;
87 int ret; 86 int ret;
88 87
89 lock_kernel();
90 ret = -EPERM;
91 if (request == PTRACE_TRACEME) {
92 /* are we already being traced? */
93 if (current->ptrace & PT_PTRACED)
94 goto out;
95 ret = security_ptrace(current->parent, current);
96 if (ret)
97 goto out;
98 /* set the ptrace bit in the process flags. */
99 current->ptrace |= PT_PTRACED;
100 ret = 0;
101 goto out;
102 }
103 ret = -ESRCH;
104 read_lock(&tasklist_lock);
105 child = find_task_by_pid(pid);
106 if (child)
107 get_task_struct(child);
108 read_unlock(&tasklist_lock);
109 if (!child)
110 goto out;
111
112 ret = -EPERM;
113 if (pid == 1) /* you may not mess with init */
114 goto out_tsk;
115
116 if (request == PTRACE_ATTACH) {
117 ret = ptrace_attach(child);
118 goto out_tsk;
119 }
120
121 ret = ptrace_check_attach(child, request == PTRACE_KILL);
122 if (ret < 0)
123 goto out_tsk;
124
125 switch (request) { 88 switch (request) {
126 /* when I and D space are separate, these will need to be fixed. */ 89 /* when I and D space are separate, these will need to be fixed. */
127 case PTRACE_PEEKTEXT: /* read word at location addr. */ 90 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -289,10 +252,7 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
289 ret = ptrace_request(child, request, addr, data); 252 ret = ptrace_request(child, request, addr, data);
290 break; 253 break;
291 } 254 }
292out_tsk: 255
293 put_task_struct(child);
294out:
295 unlock_kernel();
296 return ret; 256 return ret;
297} 257}
298 258
diff --git a/arch/sh64/kernel/ptrace.c b/arch/sh64/kernel/ptrace.c
index 71f2eec00b99..cd22e9471316 100644
--- a/arch/sh64/kernel/ptrace.c
+++ b/arch/sh64/kernel/ptrace.c
@@ -28,6 +28,7 @@
28#include <linux/ptrace.h> 28#include <linux/ptrace.h>
29#include <linux/user.h> 29#include <linux/user.h>
30#include <linux/signal.h> 30#include <linux/signal.h>
31#include <linux/syscalls.h>
31 32
32#include <asm/io.h> 33#include <asm/io.h>
33#include <asm/uaccess.h> 34#include <asm/uaccess.h>
@@ -121,61 +122,11 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
121 return 0; 122 return 0;
122} 123}
123 124
124asmlinkage long sys_ptrace(long request, long pid, long addr, long data) 125
126long arch_ptrace(struct task_struct *child, long request, long addr, long data)
125{ 127{
126 struct task_struct *child;
127 extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
128#define WPC_DBRMODE 0x0d104008
129 static int first_call = 1;
130 int ret; 128 int ret;
131 129
132 lock_kernel();
133
134 if (first_call) {
135 /* Set WPC.DBRMODE to 0. This makes all debug events get
136 * delivered through RESVEC, i.e. into the handlers in entry.S.
137 * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
138 * would normally be left set to 1, which makes debug events get
139 * delivered through DBRVEC, i.e. into the remote gdb's
140 * handlers. This prevents ptrace getting them, and confuses
141 * the remote gdb.) */
142 printk("DBRMODE set to 0 to permit native debugging\n");
143 poke_real_address_q(WPC_DBRMODE, 0);
144 first_call = 0;
145 }
146
147 ret = -EPERM;
148 if (request == PTRACE_TRACEME) {
149 /* are we already being traced? */
150 if (current->ptrace & PT_PTRACED)
151 goto out;
152 /* set the ptrace bit in the process flags. */
153 current->ptrace |= PT_PTRACED;
154 ret = 0;
155 goto out;
156 }
157 ret = -ESRCH;
158 read_lock(&tasklist_lock);
159 child = find_task_by_pid(pid);
160 if (child)
161 get_task_struct(child);
162 read_unlock(&tasklist_lock);
163 if (!child)
164 goto out;
165
166 ret = -EPERM;
167 if (pid == 1) /* you may not mess with init */
168 goto out_tsk;
169
170 if (request == PTRACE_ATTACH) {
171 ret = ptrace_attach(child);
172 goto out_tsk;
173 }
174
175 ret = ptrace_check_attach(child, request == PTRACE_KILL);
176 if (ret < 0)
177 goto out_tsk;
178
179 switch (request) { 130 switch (request) {
180 /* when I and D space are separate, these will need to be fixed. */ 131 /* when I and D space are separate, these will need to be fixed. */
181 case PTRACE_PEEKTEXT: /* read word at location addr. */ 132 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -313,13 +264,33 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
313 ret = ptrace_request(child, request, addr, data); 264 ret = ptrace_request(child, request, addr, data);
314 break; 265 break;
315 } 266 }
316out_tsk:
317 put_task_struct(child);
318out:
319 unlock_kernel();
320 return ret; 267 return ret;
321} 268}
322 269
270asmlinkage int sh64_ptrace(long request, long pid, long addr, long data)
271{
272 extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
273#define WPC_DBRMODE 0x0d104008
274 static int first_call = 1;
275
276 lock_kernel();
277 if (first_call) {
278 /* Set WPC.DBRMODE to 0. This makes all debug events get
279 * delivered through RESVEC, i.e. into the handlers in entry.S.
280 * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
281 * would normally be left set to 1, which makes debug events get
282 * delivered through DBRVEC, i.e. into the remote gdb's
283 * handlers. This prevents ptrace getting them, and confuses
284 * the remote gdb.) */
285 printk("DBRMODE set to 0 to permit native debugging\n");
286 poke_real_address_q(WPC_DBRMODE, 0);
287 first_call = 0;
288 }
289 unlock_kernel();
290
291 return sys_ptrace(request, pid, addr, data);
292}
293
323asmlinkage void syscall_trace(void) 294asmlinkage void syscall_trace(void)
324{ 295{
325 struct task_struct *tsk = current; 296 struct task_struct *tsk = current;
diff --git a/arch/sh64/kernel/syscalls.S b/arch/sh64/kernel/syscalls.S
index a3d037805f1c..c0079d54c850 100644
--- a/arch/sh64/kernel/syscalls.S
+++ b/arch/sh64/kernel/syscalls.S
@@ -46,7 +46,7 @@ sys_call_table:
46 .long sys_setuid16 46 .long sys_setuid16
47 .long sys_getuid16 47 .long sys_getuid16
48 .long sys_stime /* 25 */ 48 .long sys_stime /* 25 */
49 .long sys_ptrace 49 .long sh64_ptrace
50 .long sys_alarm 50 .long sys_alarm
51 .long sys_fstat 51 .long sys_fstat
52 .long sys_pause 52 .long sys_pause
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 71af4d503899..98e09395c093 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -43,53 +43,10 @@ void ptrace_disable(struct task_struct *child)
43extern int peek_user(struct task_struct * child, long addr, long data); 43extern int peek_user(struct task_struct * child, long addr, long data);
44extern int poke_user(struct task_struct * child, long addr, long data); 44extern int poke_user(struct task_struct * child, long addr, long data);
45 45
46long sys_ptrace(long request, long pid, long addr, long data) 46long arch_ptrace(struct task_struct *child, long request, long addr, long data)
47{ 47{
48 struct task_struct *child;
49 int i, ret; 48 int i, ret;
50 49
51 lock_kernel();
52 ret = -EPERM;
53 if (request == PTRACE_TRACEME) {
54 /* are we already being traced? */
55 if (current->ptrace & PT_PTRACED)
56 goto out;
57
58 ret = security_ptrace(current->parent, current);
59 if (ret)
60 goto out;
61
62 /* set the ptrace bit in the process flags. */
63 current->ptrace |= PT_PTRACED;
64 ret = 0;
65 goto out;
66 }
67 ret = -ESRCH;
68 read_lock(&tasklist_lock);
69 child = find_task_by_pid(pid);
70 if (child)
71 get_task_struct(child);
72 read_unlock(&tasklist_lock);
73 if (!child)
74 goto out;
75
76 ret = -EPERM;
77 if (pid == 1) /* you may not mess with init */
78 goto out_tsk;
79
80 if (request == PTRACE_ATTACH) {
81 ret = ptrace_attach(child);
82 goto out_tsk;
83 }
84
85#ifdef SUBACH_PTRACE_SPECIAL
86 SUBARCH_PTRACE_SPECIAL(child,request,addr,data);
87#endif
88
89 ret = ptrace_check_attach(child, request == PTRACE_KILL);
90 if (ret < 0)
91 goto out_tsk;
92
93 switch (request) { 50 switch (request) {
94 /* when I and D space are separate, these will need to be fixed. */ 51 /* when I and D space are separate, these will need to be fixed. */
95 case PTRACE_PEEKTEXT: /* read word at location addr. */ 52 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -282,10 +239,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
282 ret = ptrace_request(child, request, addr, data); 239 ret = ptrace_request(child, request, addr, data);
283 break; 240 break;
284 } 241 }
285 out_tsk: 242
286 put_task_struct(child);
287 out:
288 unlock_kernel();
289 return ret; 243 return ret;
290} 244}
291 245
diff --git a/arch/v850/kernel/ptrace.c b/arch/v850/kernel/ptrace.c
index d6077ff47d22..18492d02aaf6 100644
--- a/arch/v850/kernel/ptrace.c
+++ b/arch/v850/kernel/ptrace.c
@@ -113,45 +113,10 @@ static int set_single_step (struct task_struct *t, int val)
113 return 1; 113 return 1;
114} 114}
115 115
116long sys_ptrace(long request, long pid, long addr, long data) 116long arch_ptrace(struct task_struct *child, long request, long addr, long data)
117{ 117{
118 struct task_struct *child;
119 int rval; 118 int rval;
120 119
121 lock_kernel();
122
123 if (request == PTRACE_TRACEME) {
124 /* are we already being traced? */
125 if (current->ptrace & PT_PTRACED) {
126 rval = -EPERM;
127 goto out;
128 }
129 /* set the ptrace bit in the process flags. */
130 current->ptrace |= PT_PTRACED;
131 rval = 0;
132 goto out;
133 }
134 rval = -ESRCH;
135 read_lock(&tasklist_lock);
136 child = find_task_by_pid(pid);
137 if (child)
138 get_task_struct(child);
139 read_unlock(&tasklist_lock);
140 if (!child)
141 goto out;
142
143 rval = -EPERM;
144 if (pid == 1) /* you may not mess with init */
145 goto out_tsk;
146
147 if (request == PTRACE_ATTACH) {
148 rval = ptrace_attach(child);
149 goto out_tsk;
150 }
151 rval = ptrace_check_attach(child, request == PTRACE_KILL);
152 if (rval < 0)
153 goto out_tsk;
154
155 switch (request) { 120 switch (request) {
156 unsigned long val, copied; 121 unsigned long val, copied;
157 122
@@ -248,11 +213,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
248 rval = -EIO; 213 rval = -EIO;
249 goto out; 214 goto out;
250 } 215 }
251 216 out:
252out_tsk:
253 put_task_struct(child);
254out:
255 unlock_kernel();
256 return rval; 217 return rval;
257} 218}
258 219
diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c
index bbf64b59a21e..a87b6cebe80f 100644
--- a/arch/x86_64/kernel/ptrace.c
+++ b/arch/x86_64/kernel/ptrace.c
@@ -313,48 +313,11 @@ static unsigned long getreg(struct task_struct *child, unsigned long regno)
313 313
314} 314}
315 315
316asmlinkage long sys_ptrace(long request, long pid, unsigned long addr, long data) 316long arch_ptrace(struct task_struct *child, long request, long addr, long data)
317{ 317{
318 struct task_struct *child;
319 long i, ret; 318 long i, ret;
320 unsigned ui; 319 unsigned ui;
321 320
322 /* This lock_kernel fixes a subtle race with suid exec */
323 lock_kernel();
324 ret = -EPERM;
325 if (request == PTRACE_TRACEME) {
326 /* are we already being traced? */
327 if (current->ptrace & PT_PTRACED)
328 goto out;
329 ret = security_ptrace(current->parent, current);
330 if (ret)
331 goto out;
332 /* set the ptrace bit in the process flags. */
333 current->ptrace |= PT_PTRACED;
334 ret = 0;
335 goto out;
336 }
337 ret = -ESRCH;
338 read_lock(&tasklist_lock);
339 child = find_task_by_pid(pid);
340 if (child)
341 get_task_struct(child);
342 read_unlock(&tasklist_lock);
343 if (!child)
344 goto out;
345
346 ret = -EPERM;
347 if (pid == 1) /* you may not mess with init */
348 goto out_tsk;
349
350 if (request == PTRACE_ATTACH) {
351 ret = ptrace_attach(child);
352 goto out_tsk;
353 }
354 ret = ptrace_check_attach(child, request == PTRACE_KILL);
355 if (ret < 0)
356 goto out_tsk;
357
358 switch (request) { 321 switch (request) {
359 /* when I and D space are separate, these will need to be fixed. */ 322 /* when I and D space are separate, these will need to be fixed. */
360 case PTRACE_PEEKTEXT: /* read word at location addr. */ 323 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -608,10 +571,6 @@ asmlinkage long sys_ptrace(long request, long pid, unsigned long addr, long data
608 ret = ptrace_request(child, request, addr, data); 571 ret = ptrace_request(child, request, addr, data);
609 break; 572 break;
610 } 573 }
611out_tsk:
612 put_task_struct(child);
613out:
614 unlock_kernel();
615 return ret; 574 return ret;
616} 575}
617 576
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index 14460743de07..ab5c4c65b5c4 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -45,58 +45,10 @@ void ptrace_disable(struct task_struct *child)
45 /* Nothing to do.. */ 45 /* Nothing to do.. */
46} 46}
47 47
48long sys_ptrace(long request, long pid, long addr, long data) 48long arch_ptrace(struct task_struct *child, long request, long addr, long data)
49{ 49{
50 struct task_struct *child;
51 int ret = -EPERM; 50 int ret = -EPERM;
52 51
53 lock_kernel();
54
55#if 0
56 if ((int)request != 1)
57 printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
58 (int) request, (int) pid, (unsigned long) addr,
59 (unsigned long) data);
60#endif
61
62 if (request == PTRACE_TRACEME) {
63
64 /* Are we already being traced? */
65
66 if (current->ptrace & PT_PTRACED)
67 goto out;
68
69 if ((ret = security_ptrace(current->parent, current)))
70 goto out;
71
72 /* Set the ptrace bit in the process flags. */
73
74 current->ptrace |= PT_PTRACED;
75 ret = 0;
76 goto out;
77 }
78
79 ret = -ESRCH;
80 read_lock(&tasklist_lock);
81 child = find_task_by_pid(pid);
82 if (child)
83 get_task_struct(child);
84 read_unlock(&tasklist_lock);
85 if (!child)
86 goto out;
87
88 ret = -EPERM;
89 if (pid == 1) /* you may not mess with init */
90 goto out;
91
92 if (request == PTRACE_ATTACH) {
93 ret = ptrace_attach(child);
94 goto out_tsk;
95 }
96
97 if ((ret = ptrace_check_attach(child, request == PTRACE_KILL)) < 0)
98 goto out_tsk;
99
100 switch (request) { 52 switch (request) {
101 case PTRACE_PEEKTEXT: /* read word at location addr. */ 53 case PTRACE_PEEKTEXT: /* read word at location addr. */
102 case PTRACE_PEEKDATA: 54 case PTRACE_PEEKDATA:
@@ -375,10 +327,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
375 ret = ptrace_request(child, request, addr, data); 327 ret = ptrace_request(child, request, addr, data);
376 goto out; 328 goto out;
377 } 329 }
378out_tsk: 330 out:
379 put_task_struct(child);
380out:
381 unlock_kernel();
382 return ret; 331 return ret;
383} 332}
384 333
diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h
index d462c5e14c13..072375c135b4 100644
--- a/include/asm-alpha/ptrace.h
+++ b/include/asm-alpha/ptrace.h
@@ -67,6 +67,9 @@ struct switch_stack {
67}; 67};
68 68
69#ifdef __KERNEL__ 69#ifdef __KERNEL__
70
71#define __ARCH_SYS_PTRACE 1
72
70#define user_mode(regs) (((regs)->ps & 8) != 0) 73#define user_mode(regs) (((regs)->ps & 8) != 0)
71#define instruction_pointer(regs) ((regs)->pc) 74#define instruction_pointer(regs) ((regs)->pc)
72#define profile_pc(regs) instruction_pointer(regs) 75#define profile_pc(regs) instruction_pointer(regs)
diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index a79d1a7ecc77..2c703d6e0c86 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -229,6 +229,9 @@ struct switch_stack {
229}; 229};
230 230
231#ifdef __KERNEL__ 231#ifdef __KERNEL__
232
233#define __ARCH_SYS_PTRACE 1
234
232/* 235/*
233 * We use the ia64_psr(regs)->ri to determine which of the three 236 * We use the ia64_psr(regs)->ri to determine which of the three
234 * instructions in bundle (16 bytes) took the sample. Generate 237 * instructions in bundle (16 bytes) took the sample. Generate
diff --git a/include/asm-m32r/ptrace.h b/include/asm-m32r/ptrace.h
index 976417126b2d..55cd7ecfde43 100644
--- a/include/asm-m32r/ptrace.h
+++ b/include/asm-m32r/ptrace.h
@@ -145,6 +145,9 @@ struct pt_regs {
145#define PTRACE_O_TRACESYSGOOD 0x00000001 145#define PTRACE_O_TRACESYSGOOD 0x00000001
146 146
147#ifdef __KERNEL__ 147#ifdef __KERNEL__
148
149#define __ARCH_SYS_PTRACE 1
150
148#if defined(CONFIG_ISA_M32R2) || defined(CONFIG_CHIP_VDEC2) 151#if defined(CONFIG_ISA_M32R2) || defined(CONFIG_CHIP_VDEC2)
149#define user_mode(regs) ((M32R_PSW_BPM & (regs)->psw) != 0) 152#define user_mode(regs) ((M32R_PSW_BPM & (regs)->psw) != 0)
150#elif defined(CONFIG_ISA_M32R) 153#elif defined(CONFIG_ISA_M32R)
diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index fc7c96edc697..a949cc077cc7 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -468,6 +468,8 @@ struct user_regs_struct
468}; 468};
469 469
470#ifdef __KERNEL__ 470#ifdef __KERNEL__
471#define __ARCH_SYS_PTRACE 1
472
471#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) 473#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
472#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN) 474#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
473#define profile_pc(regs) instruction_pointer(regs) 475#define profile_pc(regs) instruction_pointer(regs)
diff --git a/include/asm-sparc/ptrace.h b/include/asm-sparc/ptrace.h
index a8ecb2d6977a..714497099a42 100644
--- a/include/asm-sparc/ptrace.h
+++ b/include/asm-sparc/ptrace.h
@@ -60,6 +60,9 @@ struct sparc_stackf {
60#define STACKFRAME_SZ sizeof(struct sparc_stackf) 60#define STACKFRAME_SZ sizeof(struct sparc_stackf)
61 61
62#ifdef __KERNEL__ 62#ifdef __KERNEL__
63
64#define __ARCH_SYS_PTRACE 1
65
63#define user_mode(regs) (!((regs)->psr & PSR_PS)) 66#define user_mode(regs) (!((regs)->psr & PSR_PS))
64#define instruction_pointer(regs) ((regs)->pc) 67#define instruction_pointer(regs) ((regs)->pc)
65unsigned long profile_pc(struct pt_regs *); 68unsigned long profile_pc(struct pt_regs *);
diff --git a/include/asm-sparc64/ptrace.h b/include/asm-sparc64/ptrace.h
index 6194f771e9fc..7eba90c6c753 100644
--- a/include/asm-sparc64/ptrace.h
+++ b/include/asm-sparc64/ptrace.h
@@ -94,6 +94,9 @@ struct sparc_trapf {
94#define STACKFRAME32_SZ sizeof(struct sparc_stackf32) 94#define STACKFRAME32_SZ sizeof(struct sparc_stackf32)
95 95
96#ifdef __KERNEL__ 96#ifdef __KERNEL__
97
98#define __ARCH_SYS_PTRACE 1
99
97#define force_successful_syscall_return() \ 100#define force_successful_syscall_return() \
98do { current_thread_info()->syscall_noerror = 1; \ 101do { current_thread_info()->syscall_noerror = 1; \
99} while (0) 102} while (0)
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index dc6f3647bfbc..b2b3dba1298d 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -78,6 +78,8 @@
78#include <linux/compiler.h> /* For unlikely. */ 78#include <linux/compiler.h> /* For unlikely. */
79#include <linux/sched.h> /* For struct task_struct. */ 79#include <linux/sched.h> /* For struct task_struct. */
80 80
81
82extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
81extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len); 83extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
82extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len); 84extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
83extern int ptrace_attach(struct task_struct *tsk); 85extern int ptrace_attach(struct task_struct *tsk);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 863eee8bff47..5b8dd98a230e 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -406,3 +406,85 @@ int ptrace_request(struct task_struct *child, long request,
406 406
407 return ret; 407 return ret;
408} 408}
409
410#ifndef __ARCH_SYS_PTRACE
411static int ptrace_get_task_struct(long request, long pid,
412 struct task_struct **childp)
413{
414 struct task_struct *child;
415 int ret;
416
417 /*
418 * Callers use child == NULL as an indication to exit early even
419 * when the return value is 0, so make sure it is non-NULL here.
420 */
421 *childp = NULL;
422
423 if (request == PTRACE_TRACEME) {
424 /*
425 * Are we already being traced?
426 */
427 if (current->ptrace & PT_PTRACED)
428 return -EPERM;
429 ret = security_ptrace(current->parent, current);
430 if (ret)
431 return -EPERM;
432 /*
433 * Set the ptrace bit in the process ptrace flags.
434 */
435 current->ptrace |= PT_PTRACED;
436 return 0;
437 }
438
439 /*
440 * You may not mess with init
441 */
442 if (pid == 1)
443 return -EPERM;
444
445 ret = -ESRCH;
446 read_lock(&tasklist_lock);
447 child = find_task_by_pid(pid);
448 if (child)
449 get_task_struct(child);
450 read_unlock(&tasklist_lock);
451 if (!child)
452 return -ESRCH;
453
454 *childp = child;
455 return 0;
456}
457
458asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
459{
460 struct task_struct *child;
461 long ret;
462
463 /*
464 * This lock_kernel fixes a subtle race with suid exec
465 */
466 lock_kernel();
467 ret = ptrace_get_task_struct(request, pid, &child);
468 if (!child)
469 goto out;
470
471 if (request == PTRACE_ATTACH) {
472 ret = ptrace_attach(child);
473 goto out;
474 }
475
476 ret = ptrace_check_attach(child, request == PTRACE_KILL);
477 if (ret < 0)
478 goto out_put_task_struct;
479
480 ret = arch_ptrace(child, request, addr, data);
481 if (ret < 0)
482 goto out_put_task_struct;
483
484 out_put_task_struct:
485 put_task_struct(child);
486 out:
487 unlock_kernel();
488 return ret;
489}
490#endif /* __ARCH_SYS_PTRACE */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-08 21:39:28 -0500