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ftrace: support for PowerPC

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This patch adds full support for ftrace for PowerPC (both 64 and 32 bit).
This includes dynamic tracing and function filtering.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Steven Rostedt
2008-05-14 23:49:44 -04:00
committed by Thomas Gleixner
parent e0eca07bad
commit 4e491d14f2
11 changed files with 405 additions and 10 deletions
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62
arch/powerpc/kernel/entry_64.S
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@@ -870,3 +870,65 @@ _GLOBAL(enter_prom)
ld r0,16(r1)
mtlr r0
blr
#ifdef CONFIG_FTRACE
#ifdef CONFIG_DYNAMIC_FTRACE
_GLOBAL(mcount)
_GLOBAL(_mcount)
/* Taken from output of objdump from lib64/glibc */
mflr r3
stdu r1, -112(r1)
std r3, 128(r1)
.globl mcount_call
mcount_call:
bl ftrace_stub
nop
ld r0, 128(r1)
mtlr r0
addi r1, r1, 112
blr
_GLOBAL(ftrace_caller)
/* Taken from output of objdump from lib64/glibc */
mflr r3
ld r11, 0(r1)
stdu r1, -112(r1)
std r3, 128(r1)
ld r4, 16(r11)
.globl ftrace_call
ftrace_call:
bl ftrace_stub
nop
ld r0, 128(r1)
mtlr r0
addi r1, r1, 112
_GLOBAL(ftrace_stub)
blr
#else
_GLOBAL(mcount)
blr
_GLOBAL(_mcount)
/* Taken from output of objdump from lib64/glibc */
mflr r3
ld r11, 0(r1)
stdu r1, -112(r1)
std r3, 128(r1)
ld r4, 16(r11)
LOAD_REG_ADDR(r5,ftrace_trace_function)
ld r5,0(r5)
ld r5,0(r5)
mtctr r5
bctrl
nop
ld r0, 128(r1)
mtlr r0
addi r1, r1, 112
_GLOBAL(ftrace_stub)
blr
#endif
#endif