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

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

arch/blackfin/kernel/ptrace.c

+18 −6
Original line number Diff line number Diff line
@@ -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;

}
@@ -215,8 +219,12 @@ 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,

			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))
@@ -281,8 +289,12 @@ 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,

			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))