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Commit a134d228 authored by Chris Metcalf's avatar Chris Metcalf
Browse files

arch/tile: apply commit 74fca9da to the compat signal handling as well 



This passes siginfo and mcontext to tilegx32 signal handlers that
don't have SA_SIGINFO set just as we have been doing for tilegx64.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent fc327e26

arch/tile/kernel/compat_signal.c

+5 −7
Original line number Diff line number Diff line
@@ -403,19 +403,17 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, 
	 * Set up registers for signal handler.

	 * Registers that we don't modify keep the value they had from

	 * user-space at the time we took the signal.

	 * We always pass siginfo and mcontext, regardless of SA_SIGINFO,

	 * since some things rely on this (e.g. glibc's debug/segfault.c).

	 */

	regs->pc = ptr_to_compat_reg(ka->sa.sa_handler);

	regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */

	regs->sp = ptr_to_compat_reg(frame);

	regs->lr = restorer;

	regs->regs[0] = (unsigned long) usig;



	if (ka->sa.sa_flags & SA_SIGINFO) {

		/* Need extra arguments, so mark to restore caller-saves. */

	regs->regs[1] = ptr_to_compat_reg(&frame->info);

	regs->regs[2] = ptr_to_compat_reg(&frame->uc);

	regs->flags |= PT_FLAGS_CALLER_SAVES;

	}



	/*

	 * Notify any tracer that was single-stepping it.