Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 53399053 authored by Russell King's avatar Russell King
Browse files

ARM: Ensure predictable endian state on signal handler entry 



Ensure a predictable endian state when entering signal handlers.  This
avoids programs which use SETEND to momentarily switch their endian
state from having their signal handlers entered with an unpredictable
endian state.

Cc: <stable@kernel.org>
Acked-by: default avatarDave Martin <dave.martin@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent dc810efb

arch/arm/kernel/signal.c

+3 −1
Original line number Diff line number Diff line
@@ -474,7 +474,9 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka, 
	unsigned long handler = (unsigned long)ka->sa.sa_handler;

	unsigned long retcode;

	int thumb = 0;

	unsigned long cpsr = regs->ARM_cpsr & ~PSR_f;

	unsigned long cpsr = regs->ARM_cpsr & ~(PSR_f | PSR_E_BIT);



	cpsr |= PSR_ENDSTATE;



	/*

	 * Maybe we need to deliver a 32-bit signal to a 26-bit task.