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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linked_vars.c (1190B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) 2021 Facebook */
      3
      4#include <test_progs.h>
      5#include <sys/syscall.h>
      6#include "linked_vars.skel.h"
      7
      8void test_linked_vars(void)
      9{
     10	int err;
     11	struct linked_vars *skel;
     12
     13	skel = linked_vars__open();
     14	if (!ASSERT_OK_PTR(skel, "skel_open"))
     15		return;
     16
     17	skel->bss->input_bss1 = 1000;
     18	skel->bss->input_bss2 = 2000;
     19	skel->bss->input_bss_weak = 3000;
     20
     21	err = linked_vars__load(skel);
     22	if (!ASSERT_OK(err, "skel_load"))
     23		goto cleanup;
     24
     25	err = linked_vars__attach(skel);
     26	if (!ASSERT_OK(err, "skel_attach"))
     27		goto cleanup;
     28
     29	/* trigger */
     30	syscall(SYS_getpgid);
     31
     32	ASSERT_EQ(skel->bss->output_bss1, 1000 + 2000 + 3000, "output_bss1");
     33	ASSERT_EQ(skel->bss->output_bss2, 1000 + 2000 + 3000, "output_bss2");
     34	/* 10 comes from "winner" input_data_weak in first obj file */
     35	ASSERT_EQ(skel->bss->output_data1, 1 + 2 + 10, "output_bss1");
     36	ASSERT_EQ(skel->bss->output_data2, 1 + 2 + 10, "output_bss2");
     37	/* 100 comes from "winner" input_rodata_weak in first obj file */
     38	ASSERT_EQ(skel->bss->output_rodata1, 11 + 22 + 100, "output_weak1");
     39	ASSERT_EQ(skel->bss->output_rodata2, 11 + 22 + 100, "output_weak2");
     40
     41cleanup:
     42	linked_vars__destroy(skel);
     43}