Commit 623703f6 authored Nov 24, 2005 by David Woodhouse Committed by Paul Mackerras Jan 09, 2006

[PATCH] Fix code that saves NVGPRS in 32-bit signal frame



On Thu, 2005-11-24 at 12:51 +0000, David Woodhouse wrote:
> Somehow this one slipped through the cracks; when we ended up in
> do_signal() on a 32-bit kernel but without having the caller-saved
> registers into the regs, we didn't set the TIF_SAVE_NVGPRS flag to
> ensure they got saved later.

Oh, and if we actually set the flag, then we fairly quickly find out
that I was a bit overzealous in copying code from entry_64.S ... :)

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent 9687c587

arch/powerpc/kernel/entry_32.S

+3 −3

Original line number	Diff line number	Diff line
		@@ -368,7 +368,7 @@ save_user_nvgprs_cont:
		b 6b

		save_user_nvgprs:
		ld r8,TI_SIGFRAME(r12)
		lwz r8,TI_SIGFRAME(r12)

		.macro savewords start, end
		1: stw \start,4*(\start)(r8)
		@@ -386,11 +386,11 @@ save_user_nvgprs:

		save_user_nvgprs_fault:
		li r3,11 /* SIGSEGV */
		ld r4,TI_TASK(r12)
		lwz r4,TI_TASK(r12)
		bl force_sigsegv

		rlwinm r12,r1,0,0,(31-THREAD_SHIFT) /* current_thread_info() */
		ld r9,TI_FLAGS(r12)
		lwz r9,TI_FLAGS(r12)
		b save_user_nvgprs_cont

		#ifdef SHOW_SYSCALLS