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_funcs.c (1296B)

      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_funcs.skel.h"
      7
      8void test_linked_funcs(void)
      9{
     10	int err;
     11	struct linked_funcs *skel;
     12
     13	skel = linked_funcs__open();
     14	if (!ASSERT_OK_PTR(skel, "skel_open"))
     15		return;
     16
     17	/* handler1 and handler2 are marked as SEC("?raw_tp/sys_enter") and
     18	 * are set to not autoload by default
     19	 */
     20	bpf_program__set_autoload(skel->progs.handler1, true);
     21	bpf_program__set_autoload(skel->progs.handler2, true);
     22
     23	skel->rodata->my_tid = syscall(SYS_gettid);
     24	skel->bss->syscall_id = SYS_getpgid;
     25
     26	err = linked_funcs__load(skel);
     27	if (!ASSERT_OK(err, "skel_load"))
     28		goto cleanup;
     29
     30	err = linked_funcs__attach(skel);
     31	if (!ASSERT_OK(err, "skel_attach"))
     32		goto cleanup;
     33
     34	/* trigger */
     35	syscall(SYS_getpgid);
     36
     37	ASSERT_EQ(skel->bss->output_val1, 2000 + 2000, "output_val1");
     38	ASSERT_EQ(skel->bss->output_ctx1, SYS_getpgid, "output_ctx1");
     39	ASSERT_EQ(skel->bss->output_weak1, 42, "output_weak1");
     40
     41	ASSERT_EQ(skel->bss->output_val2, 2 * 1000 + 2 * (2 * 1000), "output_val2");
     42	ASSERT_EQ(skel->bss->output_ctx2, SYS_getpgid, "output_ctx2");
     43	/* output_weak2 should never be updated */
     44	ASSERT_EQ(skel->bss->output_weak2, 0, "output_weak2");
     45
     46cleanup:
     47	linked_funcs__destroy(skel);
     48}