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| author |   Jie Zhang <jie.zhang@analog.com> | 2007-08-05 16:25:23 +0800 |
|---|---|---|
| committer |   Bryan Wu <bryan.wu@analog.com> | 2007-08-05 16:25:23 +0800 |
| commit | 2615639758c0a9e0f0e14267c9cd2b83801eb8cf (patch) | |
| tree | ded6c542741071e93024e67fd8d0fb41db05334d /arch/blackfin/kernel/ptrace.c | |
| parent | Blackfin arch: Add DMA API to set curr descriptor address (diff) | |
| download | linux-dev-2615639758c0a9e0f0e14267c9cd2b83801eb8cf.tar.xz linux-dev-2615639758c0a9e0f0e14267c9cd2b83801eb8cf.zip | |
Blackfin arch: Allow ptrace access the fixed code.
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/ptrace.c')
| -rw-r--r-- | arch/blackfin/kernel/ptrace.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index ed800c7456dd..64ce5fea8609 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -44,6 +44,7 @@ #include <asm/processor.h> #include <asm/asm-offsets.h> #include <asm/dma.h> +#include <asm/fixed_code.h> #define MAX_SHARED_LIBS 3 #define TEXT_OFFSET 0 @@ -169,6 +170,9 @@ static inline int is_user_addr_valid(struct task_struct *child, && start + len <= (unsigned long)sraml->addr + sraml->length) return 0; + if (start >= FIXED_CODE_START && start + len <= FIXED_CODE_END) + return 0; + return -EIO; } @@ -215,9 +219,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) copied = sizeof(tmp); } else #endif - copied = - access_process_vm(child, addr + add, &tmp, - sizeof(tmp), 0); + if (addr + add >= FIXED_CODE_START + && addr + add + sizeof(tmp) <= FIXED_CODE_END) { + memcpy(&tmp, (const void *)(addr + add), sizeof(tmp)); + copied = sizeof(tmp); + } else + copied = access_process_vm(child, addr + add, &tmp, + sizeof(tmp), 0); pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp); if (copied != sizeof(tmp)) break; @@ -281,9 +289,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) copied = sizeof(data); } else #endif - copied = - access_process_vm(child, addr + add, &data, - sizeof(data), 1); + if (addr + add >= FIXED_CODE_START + && addr + add + sizeof(data) <= FIXED_CODE_END) { + memcpy((void *)(addr + add), &data, sizeof(data)); + copied = sizeof(data); + } else + copied = access_process_vm(child, addr + add, &data, + sizeof(data), 1); pr_debug("ptrace: copied size %d\n", copied); if (copied != sizeof(data)) break; |