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Blackfin arch: Allow ptrace access the fixed code.

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Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Jie Zhang 2007-08-05 16:25:23 +08:00 committed by Bryan Wu
parent 8a26ac7043
commit 2615639758
1 changed files with 18 additions and 6 deletions
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24
arch/blackfin/kernel/ptrace.c
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@ -44,6 +44,7 @@
#include <asm/processor.h> #include <asm/processor.h>
#include <asm/asm-offsets.h> #include <asm/asm-offsets.h>
#include <asm/dma.h> #include <asm/dma.h>
#include <asm/fixed_code.h>
#define MAX_SHARED_LIBS 3 #define MAX_SHARED_LIBS 3
#define TEXT_OFFSET 0 #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) && start + len <= (unsigned long)sraml->addr + sraml->length)
return 0; return 0;
if (start >= FIXED_CODE_START && start + len <= FIXED_CODE_END)
return 0;
return -EIO; return -EIO;
} }
@ -215,9 +219,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
copied = sizeof(tmp); copied = sizeof(tmp);
} else } else
#endif #endif
copied = if (addr + add >= FIXED_CODE_START
access_process_vm(child, addr + add, &tmp, && addr + add + sizeof(tmp) <= FIXED_CODE_END) {
sizeof(tmp), 0); 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); pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
if (copied != sizeof(tmp)) if (copied != sizeof(tmp))
break; break;
@ -281,9 +289,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
copied = sizeof(data); copied = sizeof(data);
} else } else
#endif #endif
copied = if (addr + add >= FIXED_CODE_START
access_process_vm(child, addr + add, &data, && addr + add + sizeof(data) <= FIXED_CODE_END) {
sizeof(data), 1); 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); pr_debug("ptrace: copied size %d\n", copied);
if (copied != sizeof(data)) if (copied != sizeof(data))
break; break;