Commit 26156397 authored by Jie Zhang's avatar Jie Zhang Committed by Bryan Wu

Blackfin arch: Allow ptrace access the fixed code.

Signed-off-by: default avatarJie Zhang <jie.zhang@analog.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
parent 8a26ac70
......@@ -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;
......
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