cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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perf_callchain.c (764B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Performance event callchain support - SuperH architecture code
      4 *
      5 * Copyright (C) 2009  Paul Mundt
      6 */
      7#include <linux/kernel.h>
      8#include <linux/sched.h>
      9#include <linux/perf_event.h>
     10#include <linux/percpu.h>
     11#include <asm/unwinder.h>
     12#include <asm/ptrace.h>
     13
     14static void callchain_address(void *data, unsigned long addr, int reliable)
     15{
     16	struct perf_callchain_entry_ctx *entry = data;
     17
     18	if (reliable)
     19		perf_callchain_store(entry, addr);
     20}
     21
     22static const struct stacktrace_ops callchain_ops = {
     23	.address	= callchain_address,
     24};
     25
     26void
     27perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
     28{
     29	perf_callchain_store(entry, regs->pc);
     30
     31	unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
     32}