Commit caccf2ac authored by Joseph J Allen's avatar Joseph J Allen Committed by Michael Ellerman
Browse files

powerpc: use kernel endianness in MSR in 32-bit signal handler 



This mirrors the behavior in handle_rt_signal32, to obey kernel endianness
rather than assume a 32-bit process is big-endian. Without this change,
any 32-bit little-endian process will SIGILL immediately upon handling a
signal.

Signed-off-by: default avatarJoseph J Allen <eerykitty@gmail.com>
Signed-off-by: default avatarWill Springer <skirmisher@protonmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2058876.irdbgypaU6@sheen
parent 2377c92e

arch/powerpc/kernel/signal_32.c

+2 −1
Original line number Diff line number Diff line
@@ -929,8 +929,9 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset, 
	regs->gpr[3] = ksig->sig;

	regs->gpr[4] = (unsigned long) sc;

	regs->nip = (unsigned long)ksig->ka.sa.sa_handler;

	/* enter the signal handler in big-endian mode */

	/* enter the signal handler in native-endian mode */

	regs->msr &= ~MSR_LE;

	regs->msr |= (MSR_KERNEL & MSR_LE);

	return 0;



failed: