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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test_get_stack_rawtp_err.c (438B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/bpf.h>
      4#include <bpf/bpf_helpers.h>
      5
      6#define MAX_STACK_RAWTP 10
      7
      8SEC("raw_tracepoint/sys_enter")
      9int bpf_prog2(void *ctx)
     10{
     11	__u64 stack[MAX_STACK_RAWTP];
     12	int error;
     13
     14	/* set all the flags which should return -EINVAL */
     15	error = bpf_get_stack(ctx, stack, 0, -1);
     16	if (error < 0)
     17		goto loop;
     18
     19	return error;
     20loop:
     21	while (1) {
     22		error++;
     23	}
     24}
     25
     26char _license[] SEC("license") = "GPL";