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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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f72c1a931e
Store the kernel and user contexts from the generic layer instead of archs, this gathers some repetitive code. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Paul Mackerras <paulus@samba.org> Tested-by: Will Deacon <will.deacon@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Stephane Eranian <eranian@google.com> Cc: David Miller <davem@davemloft.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Borislav Petkov <bp@amd64.org>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* Performance event callchain support - SuperH architecture code
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*
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* Copyright (C) 2009 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/perf_event.h>
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#include <linux/percpu.h>
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#include <asm/unwinder.h>
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#include <asm/ptrace.h>
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static void callchain_warning(void *data, char *msg)
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{
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}
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static void
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callchain_warning_symbol(void *data, char *msg, unsigned long symbol)
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{
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}
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static int callchain_stack(void *data, char *name)
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{
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return 0;
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}
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static void callchain_address(void *data, unsigned long addr, int reliable)
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{
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struct perf_callchain_entry *entry = data;
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if (reliable)
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perf_callchain_store(entry, addr);
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}
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static const struct stacktrace_ops callchain_ops = {
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.warning = callchain_warning,
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.warning_symbol = callchain_warning_symbol,
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.stack = callchain_stack,
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.address = callchain_address,
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};
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void
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perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
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{
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perf_callchain_store(entry, regs->pc);
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unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
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}
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