Blackfin arch: Allow ptrace access the fixed code. (26156397) · Commits · e / devices / android_kernel_fairphone_FP4

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))