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>
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index ed800c74..64ce5fe 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 @@
&& 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 @@
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 @@
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;