PTRACE_POKEDATA consolidation

Identical implementations of PTRACE_POKEDATA go into generic_ptrace_pokedata()
function.

AFAICS, fix bug on xtensa where successful PTRACE_POKEDATA will nevertheless
return EPERM.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 0cd0605..83a7818 100644 (file)
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -315,9 +315,7 @@ do_sys_ptrace(long request, long pid, long addr, long data,
        /* When I and D space are separate, this will have to be fixed.  */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               tmp = data;
-               copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 1);
-               ret = (copied == sizeof(tmp)) ? 0 : -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the specified register */

diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 9a5d975..78c9f1a 100644 (file)
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -677,12 +677,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 */
                case PTRACE_POKETEXT:
                case PTRACE_POKEDATA:
-                       ret = access_process_vm(child, addr, &data,
-                                               sizeof(unsigned long), 1);
-                       if (ret == sizeof(unsigned long))
-                               ret = 0;
-                       else
-                               ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
 
                case PTRACE_POKEUSR:

diff --git a/arch/arm26/kernel/ptrace.c b/arch/arm26/kernel/ptrace.c
index 0d0ead0..0fefb86 100644 (file)
--- a/arch/arm26/kernel/ptrace.c
+++ b/arch/arm26/kernel/ptrace.c
@@ -551,12 +551,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 */
                case PTRACE_POKETEXT:
                case PTRACE_POKEDATA:
-                       ret = access_process_vm(child, addr, &data,
-                                               sizeof(unsigned long), 1);
-                       if (ret == sizeof(unsigned long))
-                               ret = 0;
-                       else
-                               ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
 
                case PTRACE_POKEUSR:

diff --git a/arch/avr32/kernel/ptrace.c b/arch/avr32/kernel/ptrace.c
index 1043fdc..39060cb 100644 (file)
--- a/arch/avr32/kernel/ptrace.c
+++ b/arch/avr32/kernel/ptrace.c
@@ -176,11 +176,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* Write the word in data at location addr */
        case PTRACE_POKETEXT:
        case PTRACE_POKEDATA:
-               ret = access_process_vm(child, addr, &data, sizeof(data), 1);
-               if (ret == sizeof(data))
-                       ret = 0;
-               else
-                       ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR:

diff --git a/arch/cris/arch-v10/kernel/ptrace.c b/arch/cris/arch-v10/kernel/ptrace.c
index 74b1b4d..f4f9db6 100644 (file)
--- a/arch/cris/arch-v10/kernel/ptrace.c
+++ b/arch/cris/arch-v10/kernel/ptrace.c
@@ -103,12 +103,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                /* Write the word at location address. */
                case PTRACE_POKETEXT:
                case PTRACE_POKEDATA:
-                       ret = 0;
-                       
-                       if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                               break;
-                       
-                       ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
  
                /* Write the word at location address in the USER area. */

diff --git a/arch/cris/arch-v32/kernel/ptrace.c b/arch/cris/arch-v32/kernel/ptrace.c
index d4d57b7..38ece0c 100644 (file)
--- a/arch/cris/arch-v32/kernel/ptrace.c
+++ b/arch/cris/arch-v32/kernel/ptrace.c
@@ -146,12 +146,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                /* Write the word at location address. */
                case PTRACE_POKETEXT:
                case PTRACE_POKEDATA:
-                       ret = 0;
-
-                       if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                               break;
-
-                       ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
 
                /* Write the word at location address in the USER area. */

diff --git a/arch/frv/kernel/ptrace.c b/arch/frv/kernel/ptrace.c
index a10f309..709e9bd 100644 (file)
--- a/arch/frv/kernel/ptrace.c
+++ b/arch/frv/kernel/ptrace.c
@@ -168,9 +168,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                ret = -EIO;
                if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
                        break;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
-                       break;
-               ret = 0;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c
index 8a7a991..d32bbf0 100644 (file)
--- a/arch/h8300/kernel/ptrace.c
+++ b/arch/h8300/kernel/ptrace.c
@@ -111,10 +111,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
       /* when I and D space are separate, this will have to be fixed. */
                case PTRACE_POKETEXT: /* write the word at location addr. */
                case PTRACE_POKEDATA:
-                       ret = 0;
-                       if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                               break;
-                       ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
 
                case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index f4bcf1d..1c075f5 100644 (file)
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -387,10 +387,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/m32r/kernel/ptrace.c b/arch/m32r/kernel/ptrace.c
index 01a1c9a..57a92ef 100644 (file)
--- a/arch/m32r/kernel/ptrace.c
+++ b/arch/m32r/kernel/ptrace.c
@@ -619,15 +619,9 @@ do_ptrace(long request, struct task_struct *child, long addr, long data)
         */
        case PTRACE_POKETEXT:
        case PTRACE_POKEDATA:
-               ret = access_process_vm(child, addr, &data, sizeof(data), 1);
-               if (ret == sizeof(data)) {
-                       ret = 0;
-                       if (request == PTRACE_POKETEXT) {
-                               invalidate_cache();
-                       }
-               } else {
-                       ret = -EIO;
-               }
+               ret = generic_ptrace_pokedata(child, addr, data);
+               if (ret == 0 && request == PTRACE_POKETEXT)
+                       invalidate_cache();
                break;
 
        /*

diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 01a3a09..2cf0690 100644 (file)
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -157,8 +157,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT:   /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
-                       goto out_eio;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR:    /* write the word at location addr in the USER area */

diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
index f550e61..ef70ca0 100644 (file)
--- a/arch/m68knommu/kernel/ptrace.c
+++ b/arch/m68knommu/kernel/ptrace.c
@@ -151,10 +151,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                /* when I and D space are separate, this will have to be fixed. */
                case PTRACE_POKETEXT: /* write the word at location addr. */
                case PTRACE_POKEDATA:
-                       ret = 0;
-                       if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                               break;
-                       ret = -EIO;
+                       ret = generic_ptrace_pokedata(child, addr, data);
                        break;
 
                case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index af9d0be..893e7bc 100644 (file)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -305,11 +305,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                   == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: {

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 581d427..8a177bd 100644 (file)
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -413,11 +413,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* If I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                               == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        /* write the word at location addr in the USER area */

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 28afff4..f4503ca 100644 (file)
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -314,10 +314,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
                /* Remove high order bit from address (only for 31 bit). */
                addr &= PSW_ADDR_INSN;
                /* write the word at location addr. */
-               copied = access_process_vm(child, addr, &data, sizeof(data),1);
-               if (copied != sizeof(data))
-                       return -EIO;
-               return 0;
+               return generic_ptrace_pokedata(child, addr, data);
 
        case PTRACE_POKEUSR:
                /* write the word at location addr in the USER area */

diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index f23f949..891d1d4 100644 (file)
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -126,10 +126,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/sh64/kernel/ptrace.c b/arch/sh64/kernel/ptrace.c
index 12340e4..df06c64 100644 (file)
--- a/arch/sh64/kernel/ptrace.c
+++ b/arch/sh64/kernel/ptrace.c
@@ -158,10 +158,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR:

diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 1966da6..6916c88 100644 (file)
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -64,11 +64,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = -EIO;
-               if (access_process_vm(child, addr, &data, sizeof(data), 
-                                     1) != sizeof(data))
-                       break;
-               ret = 0;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/v850/kernel/ptrace.c b/arch/v850/kernel/ptrace.c
index 3bedd14..a458ac9 100644 (file)
--- a/arch/v850/kernel/ptrace.c
+++ b/arch/v850/kernel/ptrace.c
@@ -126,11 +126,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               rval = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                   == sizeof(data))
-                       break;
-               rval = -EIO;
+               rval = generic_ptrace_pokedata(child, addr, data);
                goto out;
 
        /* Read/write the word at location ADDR in the registers.  */

diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c
index 327ff93..fa6775e 100644 (file)
--- a/arch/x86_64/kernel/ptrace.c
+++ b/arch/x86_64/kernel/ptrace.c
@@ -359,10 +359,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
        /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               ret = 0;
-               if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                break;
 
        case PTRACE_POKEUSR: /* write the word at location addr in the USER area */

diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index af182d3..06a13d9 100644 (file)
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -128,10 +128,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
        case PTRACE_POKETEXT: /* write the word at location addr. */
        case PTRACE_POKEDATA:
-               if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                   == sizeof(data))
-                       break;
-               ret = -EIO;
+               ret = generic_ptrace_pokedata(child, addr, data);
                goto out;
 
        case PTRACE_POKEUSR:

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 477cc8e..ae8146a 100644 (file)
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -111,6 +111,7 @@ static inline void ptrace_unlink(struct task_struct *child)
 }
 
 int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data);
+int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data);
 
 #ifndef force_successful_syscall_return
 /*

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1653d35..4a1745f 100644 (file)
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -501,3 +501,11 @@ int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data)
                return -EIO;
        return put_user(tmp, (unsigned long __user *)data);
 }
+
+int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data)
+{
+       int copied;
+
+       copied = access_process_vm(tsk, addr, &data, sizeof(data), 1);
+       return (copied == sizeof(data)) ? 0 : -EIO;
+}