Commit e32b3b82 authored by Qing Zhang's avatar Qing Zhang Committed by Huacai Chen
Browse files

LoongArch: Adjust user_regset_copyin parameter to the correct offset 



Ensure that user_watch_state can be set correctly by the user.

Signed-off-by: default avatarQing Zhang <zhangqing@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent ff9f3d7a

arch/loongarch/kernel/ptrace.c

+5 −5
Original line number Diff line number Diff line
@@ -546,7 +546,7 @@ static int hw_break_get(struct task_struct *target, 


	membuf_write(&to, &info, sizeof(info));



	/* (address, ctrl) registers */

	/* (address, mask, ctrl) registers */

	while (to.left) {

		ret = ptrace_hbp_get_addr(note_type, target, idx, &addr);

		if (ret)
@@ -584,7 +584,7 @@ static int hw_break_set(struct task_struct *target, 
	offset = offsetof(struct user_watch_state, dbg_regs);

	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);



	/* (address, ctrl) registers */

	/* (address, mask, ctrl) registers */

	limit = regset->n * regset->size;

	while (count && offset < limit) {

		if (count < PTRACE_HBP_ADDR_SZ)
@@ -604,7 +604,7 @@ static int hw_break_set(struct task_struct *target, 
			break;



		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &mask,

					 offset, offset + PTRACE_HBP_ADDR_SZ);

					 offset, offset + PTRACE_HBP_MASK_SZ);

		if (ret)

			return ret;
@@ -613,8 +613,8 @@ static int hw_break_set(struct task_struct *target, 
			return ret;

		offset += PTRACE_HBP_MASK_SZ;



		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &mask,

					 offset, offset + PTRACE_HBP_MASK_SZ);

		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ctrl,

					 offset, offset + PTRACE_HBP_CTRL_SZ);

		if (ret)

			return ret;