diff options
| author | Martin Schwidefsky | 2019-01-28 08:33:08 +0100 |
|---|---|---|
| committer | Martin Schwidefsky | 2019-05-02 13:54:11 +0200 |
| commit | 78c98f9074135d3dab4e39544e0a537f92388fce (patch) | |
| tree | 6f6d96e8e0911fe2aa27ec89cca52d56d3ed6f7e /arch/s390/kernel/Makefile | |
| parent | 1c705ad5efae9c712e763a47fbcc95b87b7347d2 (diff) | |
s390/unwind: introduce stack unwind API
Rework the dump_trace() stack unwinder interface to support different
unwinding algorithms. The new interface looks like this:
struct unwind_state state;
unwind_for_each_frame(&state, task, regs, start_stack)
do_something(state.sp, state.ip, state.reliable);
The unwind_bc.c file contains the implementation for the classic
back-chain unwinder.
One positive side effect of the new code is it now handles ftraced
functions gracefully. It prints the real name of the return function
instead of 'return_to_handler'.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/Makefile')
| -rw-r--r-- | arch/s390/kernel/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 19425605a83d..b0478d01a0c5 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -39,6 +39,7 @@ CFLAGS_smp.o := -Wno-nonnull # CFLAGS_stacktrace.o += -fno-optimize-sibling-calls CFLAGS_dumpstack.o += -fno-optimize-sibling-calls +CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls # # Pass UTS_MACHINE for user_regset definition @@ -51,7 +52,7 @@ obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o early_nobss.o obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o pgm_check.o obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o -obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o +obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o extra-y += head64.o vmlinux.lds |