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authorJie Zhang <jie.zhang@analog.com>2007-08-05 16:25:23 +0800
committerBryan Wu <bryan.wu@analog.com>2007-08-05 16:25:23 +0800
commit2615639758c0a9e0f0e14267c9cd2b83801eb8cf (patch)
treeded6c542741071e93024e67fd8d0fb41db05334d /arch/blackfin/kernel
parentBlackfin arch: Add DMA API to set curr descriptor address (diff)
downloadlinux-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')
-rw-r--r--arch/blackfin/kernel/ptrace.c24
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;