cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

stacktrace.c (812B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * arch/ia64/kernel/stacktrace.c
      4 *
      5 * Stack trace management functions
      6 *
      7 */
      8#include <linux/sched.h>
      9#include <linux/stacktrace.h>
     10#include <linux/module.h>
     11
     12static void
     13ia64_do_save_stack(struct unw_frame_info *info, void *arg)
     14{
     15	struct stack_trace *trace = arg;
     16	unsigned long ip;
     17	int skip = trace->skip;
     18
     19	trace->nr_entries = 0;
     20	do {
     21		unw_get_ip(info, &ip);
     22		if (ip == 0)
     23			break;
     24		if (skip == 0) {
     25			trace->entries[trace->nr_entries++] = ip;
     26			if (trace->nr_entries == trace->max_entries)
     27				break;
     28		} else
     29			skip--;
     30	} while (unw_unwind(info) >= 0);
     31}
     32
     33/*
     34 * Save stack-backtrace addresses into a stack_trace buffer.
     35 */
     36void save_stack_trace(struct stack_trace *trace)
     37{
     38	unw_init_running(ia64_do_save_stack, trace);
     39}
     40EXPORT_SYMBOL(save_stack_trace);