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| author | Anton Arapov <anton@redhat.com> | 2012-04-16 10:05:28 +0200 |
|---|---|---|
| committer | Anton Arapov <anton@redhat.com> | 2012-04-16 10:05:28 +0200 |
| commit | b4b6116a13633898cf868f2f103c96a90c4c20f8 (patch) | |
| tree | 93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/s390/kernel/mcount64.S | |
| parent | edd4be777c953e5faafc80d091d3084b4343f5d3 (diff) | |
| download | kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.tar.gz kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.tar.xz kernel-uprobes-b4b6116a13633898cf868f2f103c96a90c4c20f8.zip | |
fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/s390/kernel/mcount64.S')
| -rw-r--r-- | arch/s390/kernel/mcount64.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/s390/kernel/mcount64.S b/arch/s390/kernel/mcount64.S new file mode 100644 index 00000000000..f70cadec68f --- /dev/null +++ b/arch/s390/kernel/mcount64.S @@ -0,0 +1,63 @@ +/* + * Copyright IBM Corp. 2008,2009 + * + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, + * + */ + +#include <linux/linkage.h> +#include <asm/asm-offsets.h> + + .section .kprobes.text, "ax" + +ENTRY(ftrace_stub) + br %r14 + +ENTRY(_mcount) +#ifdef CONFIG_DYNAMIC_FTRACE + br %r14 + +ENTRY(ftrace_caller) +#endif + larl %r1,function_trace_stop + icm %r1,0xf,0(%r1) + bnzr %r14 + 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 +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + lg %r2,168(%r15) + lg %r3,272(%r15) +ENTRY(ftrace_graph_caller) +# The bras instruction gets runtime patched to call prepare_ftrace_return. +# See ftrace_enable_ftrace_graph_caller. The patched instruction is: +# bras %r14,prepare_ftrace_return + bras %r14,0f +0: stg %r2,168(%r15) +#endif + aghi %r15,160 + lmg %r2,%r5,32(%r15) + lg %r14,112(%r15) + br %r14 + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + +ENTRY(return_to_handler) + stmg %r2,%r5,32(%r15) + lgr %r1,%r15 + aghi %r15,-160 + stg %r1,__SF_BACKCHAIN(%r15) + brasl %r14,ftrace_return_to_handler + aghi %r15,160 + lgr %r14,%r2 + lmg %r2,%r5,32(%r15) + br %r14 + +#endif |