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Commit 9687c587 authored by David Woodhouse's avatar David Woodhouse Committed by Paul Mackerras
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[PATCH] Save NVGPRS in 32-bit signal frame 



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.

Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 31df1678

arch/powerpc/kernel/signal_32.c

+9 −0
Original line number Diff line number Diff line
@@ -219,6 +219,15 @@ static inline int get_old_sigaction(struct k_sigaction *new_ka, 
static inline int save_general_regs(struct pt_regs *regs,

		struct mcontext __user *frame)

{

	if (!FULL_REGS(regs)) {

		/* Zero out the unsaved GPRs to avoid information

		   leak, and set TIF_SAVE_NVGPRS to ensure that the

		   registers do actually get saved later. */

		memset(&regs->gpr[14], 0, 18 * sizeof(unsigned long));

		current_thread_info()->nvgprs_frame = &frame->mc_gregs;

		set_thread_flag(TIF_SAVE_NVGPRS);

	}



	return __copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE);

}