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authorMao Han <han_mao@c-sky.com>2019-04-10 10:27:10 +0800
committerGuo Ren <ren_guo@c-sky.com>2019-04-22 13:44:57 +0800
commitb4bf274198bd415e66af0b54a2e181c59fd43ba4 (patch)
treef517e4c2a1d0b8636e24089188a1fcf0826cf5f1 /arch/csky/abiv1/inc/abi
parent981bbf274b64496fd4376b44120d47dae4ca94e8 (diff)
downloadlinux-sh-b4bf274198bd415e66af0b54a2e181c59fd43ba4.tar.gz
csky: Add perf_arch_fetch_caller_regs support
In trace events as tracepoints context are not able to be retrieve with task_pt_regs. Without arch caller regs support the pt_regs context will be all zero, perf can not parsing the callchain and resolving the symbols correctly, some time will even get into deadlock while handling the page fault, eg: perf kmem —page record ls Changelog - Add test case cmd in comment - Use regs_fp(regs) which is defined in abi/regdef.h Signed-off-by: Mao Han <han_mao@c-sky.com> Signed-off-by: Guo Ren <guoren@kernel.org>
Diffstat (limited to 'arch/csky/abiv1/inc/abi')
-rw-r--r--arch/csky/abiv1/inc/abi/regdef.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/csky/abiv1/inc/abi/regdef.h b/arch/csky/abiv1/inc/abi/regdef.h
index 729b1c3edcfd..104707fbdcc1 100644
--- a/arch/csky/abiv1/inc/abi/regdef.h
+++ b/arch/csky/abiv1/inc/abi/regdef.h
@@ -6,6 +6,7 @@
#define syscallid r1
#define regs_syscallid(regs) regs->regs[9]
+#define regs_fp(regs) regs->regs[2]
/*
* PSR format: