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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-12-25 15:38:56 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 15:39:03 +0300 |
| commit | 5d360a75f87f288e9a25d56cca503a7c7939e490 (patch) | |
| tree | 46d9d0f1c05ac21395d1cc34abbf857a4a69cd6e /arch/s390/kernel/mcount.S | |
| parent | 98df67b324a2a986987ce29986e44ae9156b6698 (diff) | |
| download | linux-5d360a75f87f288e9a25d56cca503a7c7939e490.tar.xz | |
[S390] ftrace: function tracer backend for s390
This implements just the basic function tracer (_mcount) backend for s390.
The dynamic variant will come later.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/mcount.S')
| -rw-r--r-- | arch/s390/kernel/mcount.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S new file mode 100644 index 000000000000..397d131a345f --- /dev/null +++ b/arch/s390/kernel/mcount.S @@ -0,0 +1,56 @@ +/* + * Copyright IBM Corp. 2008 + * + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, + * + */ + +#ifndef CONFIG_64BIT +.globl _mcount +_mcount: + stm %r0,%r5,8(%r15) + st %r14,56(%r15) + lr %r1,%r15 + ahi %r15,-96 + l %r3,100(%r15) + la %r2,0(%r14) + st %r1,0(%r15) + la %r3,0(%r3) + bras %r14,0f + .long ftrace_trace_function +0: l %r14,0(%r14) + l %r14,0(%r14) + basr %r14,%r14 + ahi %r15,96 + lm %r0,%r5,8(%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 %r1,0(%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_64BIT */ |