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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-26 10:34:02 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-02 10:56:10 +0100 |
| commit | d9600c99c549732a501cb727157800623a06175d (patch) | |
| tree | 6bddb70d57fc29b83b63b6036de2750ed51503eb /arch/arm | |
| parent | f2741b78b607576f0c256604cb3d9256b3428a32 (diff) | |
| download | talos-op-linux-d9600c99c549732a501cb727157800623a06175d.tar.gz talos-op-linux-d9600c99c549732a501cb727157800623a06175d.zip | |
ARM: entry: re-allocate registers in irq entry assembly macros
This avoids the irq entry assembly corrupting r5, thereby allowing it
to be preserved through to the svc exit code.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/entry-macro-multi.S | 14 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 10 |
2 files changed, 12 insertions, 12 deletions
diff --git a/arch/arm/include/asm/entry-macro-multi.S b/arch/arm/include/asm/entry-macro-multi.S index 2da8547de6d6..2f1e2098dfe7 100644 --- a/arch/arm/include/asm/entry-macro-multi.S +++ b/arch/arm/include/asm/entry-macro-multi.S @@ -4,8 +4,8 @@ * Interrupt handling. Preserves r7, r8, r9 */ .macro arch_irq_handler_default - get_irqnr_preamble r5, lr -1: get_irqnr_and_base r0, r6, r5, lr + get_irqnr_preamble r6, lr +1: get_irqnr_and_base r0, r2, r6, lr movne r1, sp @ @ routine called with r0 = irq number, r1 = struct pt_regs * @@ -17,17 +17,17 @@ /* * XXX * - * this macro assumes that irqstat (r6) and base (r5) are + * this macro assumes that irqstat (r2) and base (r6) are * preserved from get_irqnr_and_base above */ - ALT_SMP(test_for_ipi r0, r6, r5, lr) + ALT_SMP(test_for_ipi r0, r2, r6, lr) ALT_UP_B(9997f) movne r1, sp adrne lr, BSYM(1b) bne do_IPI #ifdef CONFIG_LOCAL_TIMERS - test_for_ltirq r0, r6, r5, lr + test_for_ltirq r0, r2, r6, lr movne r0, sp adrne lr, BSYM(1b) bne do_local_timer @@ -40,7 +40,7 @@ .align 5 .global \symbol_name \symbol_name: - mov r4, lr + mov r8, lr arch_irq_handler_default - mov pc, r4 + mov pc, r8 .endm diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index a5b2c40d44e8..b17e57949d3b 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -29,16 +29,16 @@ #include <asm/entry-macro-multi.S> /* - * Interrupt handling. Preserves r7, r8, r9 + * Interrupt handling. */ .macro irq_handler #ifdef CONFIG_MULTI_IRQ_HANDLER - ldr r5, =handle_arch_irq + ldr r1, =handle_arch_irq mov r0, sp - ldr r5, [r5] + ldr r1, [r1] adr lr, BSYM(9997f) - teq r5, #0 - movne pc, r5 + teq r1, #0 + movne pc, r1 #endif arch_irq_handler_default 9997: |
