diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-03-24 16:22:10 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-08-02 14:15:04 +0100 |
| commit | fcea45236d3ffcd317296d75612eb163bf734407 (patch) | |
| tree | 4a5956bb54a412a333805022eb05334c3bd5b835 | |
| parent | da594e3fff398a164c77dd728d9fbfc6880881e6 (diff) | |
| download | op-kernel-dev-fcea45236d3ffcd317296d75612eb163bf734407.zip op-kernel-dev-fcea45236d3ffcd317296d75612eb163bf734407.tar.gz | |
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 <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 374c287..1b3fc79 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 |
