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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980// SPDX-License-Identifier: GPL-2.0/* * arch/sh/kernel/stacktrace.c * * Stack trace management functions * * Copyright (C) 2006 - 2008 Paul Mundt */#include <linux/sched.h>#include <linux/sched/debug.h>#include <linux/stacktrace.h>#include <linux/thread_info.h>#include <linux/module.h>#include <asm/unwinder.h>#include <asm/ptrace.h>#include <asm/stacktrace.h>
/* * Save stack-backtrace addresses into a stack_trace buffer. */static void save_stack_address(void *data, unsigned long addr, int reliable){ struct stack_trace *trace = data;
if (!reliable) return;
if (trace->skip > 0) { trace->skip--; return; }
if (trace->nr_entries < trace->max_entries) trace->entries[trace->nr_entries++] = addr;}
static const struct stacktrace_ops save_stack_ops = { .address = save_stack_address,};
void save_stack_trace(struct stack_trace *trace){ unsigned long *sp = (unsigned long *)current_stack_pointer;
unwind_stack(current, NULL, sp, &save_stack_ops, trace);}EXPORT_SYMBOL_GPL(save_stack_trace);
static voidsave_stack_address_nosched(void *data, unsigned long addr, int reliable){ struct stack_trace *trace = (struct stack_trace *)data;
if (!reliable) return;
if (in_sched_functions(addr)) return;
if (trace->skip > 0) { trace->skip--; return; }
if (trace->nr_entries < trace->max_entries) trace->entries[trace->nr_entries++] = addr;}
static const struct stacktrace_ops save_stack_ops_nosched = { .address = save_stack_address_nosched,};
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace){ unsigned long *sp = (unsigned long *)tsk->thread.sp;
unwind_stack(current, NULL, sp, &save_stack_ops_nosched, trace);}EXPORT_SYMBOL_GPL(save_stack_trace_tsk);