microblaze: Clear return value in pt_regs



Signal code uses r3 value which saved in restore_sigcontext to
rt_sigframe but it require to be zeroed. If is not zero rt_sigframe
contains wrong values.

Signed-off-by: Michal Simek <monstr@monstr.eu>

parent 791d0a16

arch/microblaze/kernel/entry.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -295,6 +295,8 @@ C_ENTRY(_user_exception):
		/* addik r1, r1, -STATE_SAVE_SIZE; */
		addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE;
		SAVE_REGS
		swi r0, r1, PTO + PT_R3
		swi r0, r1, PTO + PT_R4

		lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
		swi r11, r1, PTO+PT_R1; /* Store user SP. */