diff options
| -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; |