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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-02-18 16:51:28 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-05-02 13:54:11 +0200 |
| commit | ec7bf4789d95a0053bac0dfa36fbefd8cc584eea (patch) | |
| tree | 5ad08bd5f30c065e312944baf8eafd0b4766f654 /arch/s390/kernel/mcount.S | |
| parent | s390/unwind: introduce stack unwind API (diff) | |
| download | linux-ec7bf4789d95a0053bac0dfa36fbefd8cc584eea.tar.xz linux-ec7bf4789d95a0053bac0dfa36fbefd8cc584eea.zip | |
s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
Make the call chain more reliable by tagging the ftrace stack entries
with the stack pointer that is associated with the return address.
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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S index 09ae6da0aaa5..9e1660a6b9db 100644 --- a/arch/s390/kernel/mcount.S +++ b/arch/s390/kernel/mcount.S @@ -65,8 +65,8 @@ ENTRY(ftrace_caller) .globl ftrace_graph_caller ftrace_graph_caller: j ftrace_graph_caller_end - lg %r2,(STACK_PTREGS_GPRS+14*8)(%r15) - lg %r3,(STACK_PTREGS_PSW+8)(%r15) + lmg %r2,%r3,(STACK_PTREGS_GPRS+14*8)(%r15) + lg %r4,(STACK_PTREGS_PSW+8)(%r15) brasl %r14,prepare_ftrace_return stg %r2,(STACK_PTREGS_GPRS+14*8)(%r15) ftrace_graph_caller_end: |