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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-04-03 00:22:11 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-04-03 00:22:11 +0200 |
| commit | cd02938a828f4b2098a074afb7454f106f2e8df5 (patch) | |
| tree | 7b543fd6aa82a62dc3a9614c26f89daca83e77d5 /arch/powerpc/kernel/entry_64.S | |
| parent | [ARM] 5444/1: ARM: Realview: Fix event-device multiplicators in localtimer.c (diff) | |
| parent | ARM: Add SMSC911X support to Overo platform (V2) (diff) | |
| download | linux-cd02938a828f4b2098a074afb7454f106f2e8df5.tar.xz linux-cd02938a828f4b2098a074afb7454f106f2e8df5.zip | |
Merge branch 'smsc911x-armplatforms' of git://github.com/steveglen/linux-2.6
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 89 |
1 files changed, 86 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 383ed6eb0085..abfc32330479 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -908,6 +908,12 @@ _GLOBAL(ftrace_caller) ftrace_call: bl ftrace_stub nop +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +.globl ftrace_graph_call +ftrace_graph_call: + b ftrace_graph_stub +_GLOBAL(ftrace_graph_stub) +#endif ld r0, 128(r1) mtlr r0 addi r1, r1, 112 @@ -931,13 +937,90 @@ _GLOBAL(_mcount) ld r5,0(r5) mtctr r5 bctrl - nop + + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + b ftrace_graph_caller +#endif ld r0, 128(r1) mtlr r0 addi r1, r1, 112 _GLOBAL(ftrace_stub) blr -#endif -#endif +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +_GLOBAL(ftrace_graph_caller) + /* load r4 with local address */ + ld r4, 128(r1) + subi r4, r4, MCOUNT_INSN_SIZE + + /* get the parent address */ + ld r11, 112(r1) + addi r3, r11, 16 + + bl .prepare_ftrace_return + nop + + ld r0, 128(r1) + mtlr r0 + addi r1, r1, 112 + blr + +_GLOBAL(return_to_handler) + /* need to save return values */ + std r4, -24(r1) + std r3, -16(r1) + std r31, -8(r1) + mr r31, r1 + stdu r1, -112(r1) + + bl .ftrace_return_to_handler + nop + + /* return value has real return address */ + mtlr r3 + + ld r1, 0(r1) + ld r4, -24(r1) + ld r3, -16(r1) + ld r31, -8(r1) + + /* Jump back to real return address */ + blr + +_GLOBAL(mod_return_to_handler) + /* need to save return values */ + std r4, -32(r1) + std r3, -24(r1) + /* save TOC */ + std r2, -16(r1) + std r31, -8(r1) + mr r31, r1 + stdu r1, -112(r1) + + /* + * We are in a module using the module's TOC. + * Switch to our TOC to run inside the core kernel. + */ + LOAD_REG_IMMEDIATE(r4,ftrace_return_to_handler) + ld r2, 8(r4) + + bl .ftrace_return_to_handler + nop + + /* return value has real return address */ + mtlr r3 + + ld r1, 0(r1) + ld r4, -32(r1) + ld r3, -24(r1) + ld r2, -16(r1) + ld r31, -8(r1) + + /* Jump back to real return address */ + blr +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ +#endif /* CONFIG_FUNCTION_TRACER */ |