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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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130
arch/powerpc/kernel/entry_32.S
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@@ -1035,3 +1035,133 @@ machine_check_in_rtas:
/* XXX load up BATs and panic */
#endif /* CONFIG_PPC_RTAS */
#ifdef CONFIG_FTRACE
#ifdef CONFIG_DYNAMIC_FTRACE
_GLOBAL(mcount)
_GLOBAL(_mcount)
stwu r1,-48(r1)
stw r3, 12(r1)
stw r4, 16(r1)
stw r5, 20(r1)
stw r6, 24(r1)
mflr r3
stw r7, 28(r1)
mfcr r5
stw r8, 32(r1)
stw r9, 36(r1)
stw r10,40(r1)
stw r3, 44(r1)
stw r5, 8(r1)
.globl mcount_call
mcount_call:
bl ftrace_stub
nop
lwz r6, 8(r1)
lwz r0, 44(r1)
lwz r3, 12(r1)
mtctr r0
lwz r4, 16(r1)
mtcr r6
lwz r5, 20(r1)
lwz r6, 24(r1)
lwz r0, 52(r1)
lwz r7, 28(r1)
lwz r8, 32(r1)
mtlr r0
lwz r9, 36(r1)
lwz r10,40(r1)
addi r1, r1, 48
bctr
_GLOBAL(ftrace_caller)
/* Based off of objdump optput from glibc */
stwu r1,-48(r1)
stw r3, 12(r1)
stw r4, 16(r1)
stw r5, 20(r1)
stw r6, 24(r1)
mflr r3
lwz r4, 52(r1)
mfcr r5
stw r7, 28(r1)
stw r8, 32(r1)
stw r9, 36(r1)
stw r10,40(r1)
stw r3, 44(r1)
stw r5, 8(r1)
.globl ftrace_call
ftrace_call:
bl ftrace_stub
nop
lwz r6, 8(r1)
lwz r0, 44(r1)
lwz r3, 12(r1)
mtctr r0
lwz r4, 16(r1)
mtcr r6
lwz r5, 20(r1)
lwz r6, 24(r1)
lwz r0, 52(r1)
lwz r7, 28(r1)
lwz r8, 32(r1)
mtlr r0
lwz r9, 36(r1)
lwz r10,40(r1)
addi r1, r1, 48
bctr
#else
_GLOBAL(mcount)
_GLOBAL(_mcount)
stwu r1,-48(r1)
stw r3, 12(r1)
stw r4, 16(r1)
stw r5, 20(r1)
stw r6, 24(r1)
mflr r3
lwz r4, 52(r1)
mfcr r5
stw r7, 28(r1)
stw r8, 32(r1)
stw r9, 36(r1)
stw r10,40(r1)
stw r3, 44(r1)
stw r5, 8(r1)
LOAD_REG_ADDR(r5, ftrace_trace_function)
#if 0
mtctr r3
mr r1, r5
bctrl
#endif
lwz r5,0(r5)
#if 1
mtctr r5
bctrl
#else
bl ftrace_stub
#endif
nop
lwz r6, 8(r1)
lwz r0, 44(r1)
lwz r3, 12(r1)
mtctr r0
lwz r4, 16(r1)
mtcr r6
lwz r5, 20(r1)
lwz r6, 24(r1)
lwz r0, 52(r1)
lwz r7, 28(r1)
lwz r8, 32(r1)
mtlr r0
lwz r9, 36(r1)
lwz r10,40(r1)
addi r1, r1, 48
bctr
#endif
_GLOBAL(ftrace_stub)
blr
#endif /* CONFIG_MCOUNT */