xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[S390] ftrace: add dynamic ftrace support

Browse Source 
Dynamic ftrace support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2009-06-12 10:26:44 +02:00
committed by Martin Schwidefsky
parent a2b53673fa
commit dfd9f7abc0
10 changed files with 281 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

129
arch/s390/kernel/mcount.S
View File

@@ -1,5 +1,5 @@
/*
* Copyright IBM Corp. 2008
* Copyright IBM Corp. 2008,2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
@@ -7,10 +7,101 @@
#include <asm/asm-offsets.h>
#ifndef CONFIG_64BIT
.globl _mcount
.globl ftrace_stub
ftrace_stub:
br %r14
#ifdef CONFIG_64BIT
#ifdef CONFIG_DYNAMIC_FTRACE
.globl _mcount
_mcount:
stm %r0,%r5,8(%r15)
br %r14
.globl ftrace_caller
ftrace_caller:
stmg %r2,%r5,32(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_dyn_func
lg %r14,0(%r14)
basr %r14,%r14
aghi %r15,160
lmg %r2,%r5,32(%r15)
lg %r14,112(%r15)
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.quad ftrace_stub
.previous
#else /* CONFIG_DYNAMIC_FTRACE */
.globl _mcount
_mcount:
stmg %r2,%r5,32(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14
aghi %r15,160
lmg %r2,%r5,32(%r15)
lg %r14,112(%r15)
br %r14
#endif /* CONFIG_DYNAMIC_FTRACE */
#else /* CONFIG_64BIT */
#ifdef CONFIG_DYNAMIC_FTRACE
.globl _mcount
_mcount:
br %r14
.globl ftrace_caller
ftrace_caller:
stm %r2,%r5,16(%r15)
st %r14,56(%r15)
lr %r1,%r15
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
st %r1,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
bras %r14,0f
.long ftrace_dyn_func
0: l %r14,0(%r14)
l %r14,0(%r14)
basr %r14,%r14
ahi %r15,96
lm %r2,%r5,16(%r15)
l %r14,56(%r15)
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.long ftrace_stub
.previous
#else /* CONFIG_DYNAMIC_FTRACE */
.globl _mcount
_mcount:
stm %r2,%r5,16(%r15)
st %r14,56(%r15)
lr %r1,%r15
ahi %r15,-96
@@ -24,35 +115,9 @@ _mcount:
l %r14,0(%r14)
basr %r14,%r14
ahi %r15,96
lm %r0,%r5,8(%r15)
lm %r2,%r5,16(%r15)
l %r14,56(%r15)
br %r14
.globl ftrace_stub
ftrace_stub:
br %r14
#else /* CONFIG_64BIT */
.globl _mcount
_mcount:
stmg %r0,%r5,16(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14
aghi %r15,160
lmg %r0,%r5,16(%r15)
lg %r14,112(%r15)
br %r14
.globl ftrace_stub
ftrace_stub:
br %r14
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_64BIT */