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authorJie Zhang <jie.zhang@analog.com>2009-03-05 18:50:26 +0800
committerBryan Wu <cooloney@kernel.org>2009-03-05 18:50:26 +0800
commit7786ce823b1c9a3de01a63857e3451890cb4e81c (patch)
tree77941d01dee1a317c9c67f15e41e27a62f9191db /arch/blackfin
parent27276ba21fe590edc43305f483565aa02010bbbb (diff)
downloadlinux-7786ce823b1c9a3de01a63857e3451890cb4e81c.tar.bz2
Blackfin arch: fix bug - gdb signull case make trunk kernel panic frequently
Use copy_to_user_page and copy_from_user_page instead of memcpy. copy_to_user_page does cache flush when necessary. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/ptrace.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 594e325b40e4..d76618db50df 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -45,6 +45,7 @@
#include <asm/asm-offsets.h>
#include <asm/dma.h>
#include <asm/fixed_code.h>
+#include <asm/cacheflush.h>
#include <asm/mem_map.h>
#define TEXT_OFFSET 0
@@ -240,7 +241,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
} else if (addr >= FIXED_CODE_START
&& addr + sizeof(tmp) <= FIXED_CODE_END) {
- memcpy(&tmp, (const void *)(addr), sizeof(tmp));
+ copy_from_user_page(0, 0, 0, &tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
@@ -320,7 +321,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
} else if (addr >= FIXED_CODE_START
&& addr + sizeof(data) <= FIXED_CODE_END) {
- memcpy((void *)(addr), &data, sizeof(data));
+ copy_to_user_page(0, 0, 0, (void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else