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Commit 791d0a16 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Fix sys_rt_sigreturn_wrapper 



Do not save return registers before rt_sigreturn is called.
_user_exception(syscall handler) already setup return address
that's why it is removed from rt_sigreturn_wrapper.

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent 06d19734

arch/microblaze/kernel/entry.S

+1 −7
Original line number Diff line number Diff line
@@ -458,14 +458,8 @@ C_ENTRY(sys_execve): 
	addik	r8, r1, PTO;		/* add user context as 4th arg */



C_ENTRY(sys_rt_sigreturn_wrapper):

	swi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */

	swi	r4, r1, PTO+PT_R4;

	brlid	r15, sys_rt_sigreturn	/* Do real work */

	brid	sys_rt_sigreturn	/* Do real work */

	addik	r5, r1, PTO;		/* add user context as 1st arg */

	lwi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */

	lwi	r4, r1, PTO+PT_R4;

	bri ret_from_trap /* fall through will not work here due to align */

	nop;



/*

 * HW EXCEPTION rutine start