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b4bf274198
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>
16 lines
418 B
C
16 lines
418 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#ifndef __ASM_CSKY_PERF_EVENT_H
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#define __ASM_CSKY_PERF_EVENT_H
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#include <abi/regdef.h>
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#define perf_arch_fetch_caller_regs(regs, __ip) { \
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(regs)->pc = (__ip); \
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regs_fp(regs) = (unsigned long) __builtin_frame_address(0); \
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asm volatile("mov %0, sp\n":"=r"((regs)->usp)); \
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}
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#endif /* __ASM_PERF_EVENT_ELF_H */
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