mirror of https://gitee.com/openkylin/linux.git
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
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/*
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* Stack trace support for Microblaze.
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*
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* Copyright (C) 2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2009 PetaLogix
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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/sched.h>
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#include <linux/stacktrace.h>
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#include <linux/thread_info.h>
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#include <linux/ptrace.h>
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#include <linux/module.h>
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/* FIXME initial support */
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void save_stack_trace(struct stack_trace *trace)
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{
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unsigned long *sp;
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unsigned long addr;
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asm("addik %0, r1, 0" : "=r" (sp));
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while (!kstack_end(sp)) {
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addr = *sp++;
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if (__kernel_text_address(addr)) {
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if (trace->skip > 0)
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trace->skip--;
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else
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trace->entries[trace->nr_entries++] = addr;
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if (trace->nr_entries >= trace->max_entries)
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break;
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}
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}
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}
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EXPORT_SYMBOL_GPL(save_stack_trace);
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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 int *sp;
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unsigned long addr;
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struct thread_info *ti = task_thread_info(tsk);
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if (tsk == current)
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asm("addik %0, r1, 0" : "=r" (sp));
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else
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sp = (unsigned int *)ti->cpu_context.r1;
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while (!kstack_end(sp)) {
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addr = *sp++;
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if (__kernel_text_address(addr)) {
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if (trace->skip > 0)
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trace->skip--;
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else
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trace->entries[trace->nr_entries++] = addr;
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if (trace->nr_entries >= trace->max_entries)
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break;
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}
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}
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}
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EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
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