Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM. (6546eae4) · Commits · 戴 / test

arch/blackfin/kernel/ptrace.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -219,6 +219,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		safe_dma_memcpy (&tmp, (const void *)(addr + add), sizeof(tmp));
		copied = sizeof(tmp);
		} else
		#endif
		#if L1_DATA_A_LENGTH != 0
		if (addr + add >= L1_DATA_A_START
		&& addr + add + sizeof(tmp) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
		memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
		copied = sizeof(tmp);
		} else
		#endif
		#if L1_DATA_B_LENGTH != 0
		if (addr + add >= L1_DATA_B_START
		&& addr + add + sizeof(tmp) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
		memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
		copied = sizeof(tmp);
		} else
		#endif
		if (addr + add >= FIXED_CODE_START
		&& addr + add + sizeof(tmp) <= FIXED_CODE_END) {
		@@ -289,6 +303,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		safe_dma_memcpy ((void *)(addr + add), &data, sizeof(data));
		copied = sizeof(data);
		} else
		#endif
		#if L1_DATA_A_LENGTH != 0
		if (addr + add >= L1_DATA_A_START
		&& addr + add + sizeof(data) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
		memcpy((void *)(addr + add), &data, sizeof(data));
		copied = sizeof(data);
		} else
		#endif
		#if L1_DATA_B_LENGTH != 0
		if (addr + add >= L1_DATA_B_START
		&& addr + add + sizeof(data) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
		memcpy((void *)(addr + add), &data, sizeof(data));
		copied = sizeof(data);
		} else
		#endif
		if (addr + add >= FIXED_CODE_START
		&& addr + add + sizeof(data) <= FIXED_CODE_END) {