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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-15 13:45:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-15 13:45:59 +0200 |
| commit | 91d0322bef047e2916b3e52741411bffc63929cb (patch) | |
| tree | 44c4fd13cc17755a6db8a3d70cffb86e57a838dc /arch/arm/kernel/entry-common.S | |
| parent | 065cb3dfe24978651caedfa54da585388ad15dde (diff) | |
| parent | 50515af207d410c9f228380e529c56f43c3de0bd (diff) | |
| download | talos-op-linux-91d0322bef047e2916b3e52741411bffc63929cb.tar.gz talos-op-linux-91d0322bef047e2916b3e52741411bffc63929cb.zip | |
Merge branch 'linus' into x86/urgent
Diffstat (limited to 'arch/arm/kernel/entry-common.S')
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 597ed00a08d8..84694e88b428 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -9,6 +9,7 @@ */ #include <asm/unistd.h> +#include <asm/ftrace.h> #include <asm/arch/entry-macro.S> #include "entry-header.S" @@ -99,6 +100,56 @@ ENTRY(ret_from_fork) #undef CALL #define CALL(x) .long x +#ifdef CONFIG_FTRACE +#ifdef CONFIG_DYNAMIC_FTRACE +ENTRY(mcount) + stmdb sp!, {r0-r3, lr} + mov r0, lr + sub r0, r0, #MCOUNT_INSN_SIZE + + .globl mcount_call +mcount_call: + bl ftrace_stub + ldmia sp!, {r0-r3, pc} + +ENTRY(ftrace_caller) + stmdb sp!, {r0-r3, lr} + ldr r1, [fp, #-4] + mov r0, lr + sub r0, r0, #MCOUNT_INSN_SIZE + + .globl ftrace_call +ftrace_call: + bl ftrace_stub + ldmia sp!, {r0-r3, pc} + +#else + +ENTRY(mcount) + stmdb sp!, {r0-r3, lr} + ldr r0, =ftrace_trace_function + ldr r2, [r0] + adr r0, ftrace_stub + cmp r0, r2 + bne trace + ldmia sp!, {r0-r3, pc} + +trace: + ldr r1, [fp, #-4] + mov r0, lr + sub r0, r0, #MCOUNT_INSN_SIZE + mov lr, pc + mov pc, r2 + ldmia sp!, {r0-r3, pc} + +#endif /* CONFIG_DYNAMIC_FTRACE */ + + .globl ftrace_stub +ftrace_stub: + mov pc, lr + +#endif /* CONFIG_FTRACE */ + /*============================================================================= * SWI handler *----------------------------------------------------------------------------- |
