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authorMike Frysinger <vapier.adi@gmail.com>2008-10-09 15:17:36 +0800
committerBryan Wu <cooloney@kernel.org>2008-10-09 15:17:36 +0800
commitdabaad5b90dec6909c984d95330f6f41c325f9a8 (patch)
treef0f8e8c4a33d8f2b629e600cfa4a5b6a37d874d2
parentdd4354fa51f6379fb3ac98ba9377ca5895f50497 (diff)
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Blackfin arch: fix bug -- PTRACE_PEEKDATA does not seem to work which breaks umoven() in strace
Don't add arbitrary offset when peeking at data Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
-rw-r--r--arch/blackfin/kernel/ptrace.c66
1 files changed, 31 insertions, 35 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index bf1a51d..9ce80d0 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -46,7 +46,6 @@
#include <asm/dma.h>
#include <asm/fixed_code.h>
-#define MAX_SHARED_LIBS 3
#define TEXT_OFFSET 0
/*
* does not yet catch signals sent when the child dies.
@@ -192,14 +191,12 @@ void ptrace_disable(struct task_struct *child)
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
int ret;
- int add = 0;
unsigned long __user *datap = (unsigned long __user *)data;
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKDATA:
pr_debug("ptrace: PEEKDATA\n");
- add = MAX_SHARED_LIBS * 4; /* space between text and data */
/* fall through */
case PTRACE_PEEKTEXT: /* read word at location addr. */
{
@@ -207,39 +204,38 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
int copied;
ret = -EIO;
- pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + add %d %ld\n", addr, add,
- sizeof(data));
- if (is_user_addr_valid(child, addr + add, sizeof(tmp)) < 0)
+ pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + %ld\n", addr, sizeof(data));
+ if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
break;
pr_debug("ptrace: user address is valid\n");
#if L1_CODE_LENGTH != 0
- if (addr + add >= L1_CODE_START
- && addr + add + sizeof(tmp) <= L1_CODE_START + L1_CODE_LENGTH) {
- safe_dma_memcpy (&tmp, (const void *)(addr + add), sizeof(tmp));
+ if (addr >= L1_CODE_START
+ && addr + sizeof(tmp) <= L1_CODE_START + L1_CODE_LENGTH) {
+ safe_dma_memcpy (&tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
#endif
#if L1_DATA_A_LENGTH != 0
- if (addr + add >= L1_DATA_A_START
- && addr + add + sizeof(tmp) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
- memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
+ if (addr >= L1_DATA_A_START
+ && addr + sizeof(tmp) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
+ memcpy(&tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
#endif
#if L1_DATA_B_LENGTH != 0
- if (addr + add >= L1_DATA_B_START
- && addr + add + sizeof(tmp) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
- memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
+ if (addr >= L1_DATA_B_START
+ && addr + sizeof(tmp) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
+ memcpy(&tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
#endif
- if (addr + add >= FIXED_CODE_START
- && addr + add + sizeof(tmp) <= FIXED_CODE_END) {
- memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
+ if (addr >= FIXED_CODE_START
+ && addr + sizeof(tmp) <= FIXED_CODE_END) {
+ memcpy(&tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
- copied = access_process_vm(child, addr + add, &tmp,
+ copied = access_process_vm(child, addr, &tmp,
sizeof(tmp), 0);
pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
if (copied != sizeof(tmp))
@@ -291,39 +287,39 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
int copied;
ret = -EIO;
- pr_debug("ptrace: POKETEXT at addr 0x%08lx + add %d %ld bytes %lx\n",
- addr, add, sizeof(data), data);
- if (is_user_addr_valid(child, addr + add, sizeof(data)) < 0)
+ pr_debug("ptrace: POKETEXT at addr 0x%08lx + %ld bytes %lx\n",
+ addr, sizeof(data), data);
+ if (is_user_addr_valid(child, addr, sizeof(data)) < 0)
break;
pr_debug("ptrace: user address is valid\n");
#if L1_CODE_LENGTH != 0
- if (addr + add >= L1_CODE_START
- && addr + add + sizeof(data) <= L1_CODE_START + L1_CODE_LENGTH) {
- safe_dma_memcpy ((void *)(addr + add), &data, sizeof(data));
+ if (addr >= L1_CODE_START
+ && addr + sizeof(data) <= L1_CODE_START + L1_CODE_LENGTH) {
+ safe_dma_memcpy ((void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else
#endif
#if L1_DATA_A_LENGTH != 0
- if (addr + add >= L1_DATA_A_START
- && addr + add + sizeof(data) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
- memcpy((void *)(addr + add), &data, sizeof(data));
+ if (addr >= L1_DATA_A_START
+ && addr + sizeof(data) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
+ memcpy((void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else
#endif
#if L1_DATA_B_LENGTH != 0
- if (addr + add >= L1_DATA_B_START
- && addr + add + sizeof(data) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
- memcpy((void *)(addr + add), &data, sizeof(data));
+ if (addr >= L1_DATA_B_START
+ && addr + sizeof(data) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
+ memcpy((void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else
#endif
- if (addr + add >= FIXED_CODE_START
- && addr + add + sizeof(data) <= FIXED_CODE_END) {
- memcpy((void *)(addr + add), &data, sizeof(data));
+ if (addr >= FIXED_CODE_START
+ && addr + sizeof(data) <= FIXED_CODE_END) {
+ memcpy((void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else
- copied = access_process_vm(child, addr + add, &data,
+ copied = access_process_vm(child, addr, &data,
sizeof(data), 1);
pr_debug("ptrace: copied size %d\n", copied);
if (copied != sizeof(data))