From fcea45236d3ffcd317296d75612eb163bf734407 Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 24 Mar 2017 16:22:10 +0000 Subject: ARM: move PC value into r9 Move the saved PC value into r9, thereby moving it into a caller-saved register for functions that we may call during the entry to a syscall. Signed-off-by: Russell King --- arch/arm/kernel/entry-common.S | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/arm/kernel/entry-common.S') diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 374c28723547..1b3fc79d0e8b 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -28,7 +28,13 @@ #include "entry-header.S" saved_psr .req r8 +#if defined(CONFIG_TRACE_IRQFLAGS) || defined(CONFIG_CONTEXT_TRACKING) +saved_pc .req r9 +#define TRACE(x...) x +#else saved_pc .req lr +#define TRACE(x...) +#endif .align 5 #if !(IS_ENABLED(CONFIG_TRACE_IRQFLAGS) || IS_ENABLED(CONFIG_CONTEXT_TRACKING)) @@ -144,6 +150,7 @@ ENTRY(vector_swi) THUMB( mov r8, sp ) THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr mrs saved_psr, spsr @ called from non-FIQ mode, so ok. + TRACE( mov saved_pc, lr ) str saved_pc, [sp, #S_PC] @ Save calling PC str saved_psr, [sp, #S_PSR] @ Save CPSR str r0, [sp, #S_OLD_R0] @ Save OLD_R0 -- cgit