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