mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
42 lines
889 B
C
42 lines
889 B
C
#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 <asm/ptrace.h>
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void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
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{
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unsigned long ksp, fp, thread_base;
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struct thread_info *tp;
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if (!task)
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task = current;
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tp = task_thread_info(task);
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if (task == current) {
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flushw_all();
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__asm__ __volatile__(
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"mov %%fp, %0"
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: "=r" (ksp)
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);
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} else
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ksp = tp->ksp;
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fp = ksp + STACK_BIAS;
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thread_base = (unsigned long) tp;
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do {
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struct reg_window *rw;
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/* Bogus frame pointer? */
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if (fp < (thread_base + sizeof(struct thread_info)) ||
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fp >= (thread_base + THREAD_SIZE))
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break;
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rw = (struct reg_window *) fp;
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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++] = rw->ins[7];
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fp = rw->ins[6] + STACK_BIAS;
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} while (trace->nr_entries < trace->max_entries);
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}
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