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Linux/tools/perf/tests/genelf.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 #include <limits.h>
  3 #include <stdio.h>
  4 #include <stdlib.h>
  5 #include <string.h>
  6 #include <unistd.h>
  7 #include <linux/compiler.h>
  8 
  9 #include "debug.h"
 10 #include "tests.h"
 11 
 12 #ifdef HAVE_JITDUMP
 13 #include <libelf.h>
 14 #include "../util/genelf.h"
 15 #endif
 16 
 17 #define TEMPL "/tmp/perf-test-XXXXXX"
 18 
 19 int test__jit_write_elf(struct test *test __maybe_unused,
 20                         int subtest __maybe_unused)
 21 {
 22 #ifdef HAVE_JITDUMP
 23         static unsigned char x86_code[] = {
 24                 0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
 25                 0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
 26                 0xCD, 0x80            /* int $0x80 */
 27         };
 28         char path[PATH_MAX];
 29         int fd, ret;
 30 
 31         strcpy(path, TEMPL);
 32 
 33         fd = mkstemp(path);
 34         if (fd < 0) {
 35                 perror("mkstemp failed");
 36                 return TEST_FAIL;
 37         }
 38 
 39         pr_info("Writing jit code to: %s\n", path);
 40 
 41         ret = jit_write_elf(fd, 0, "main", x86_code, sizeof(x86_code),
 42                         NULL, 0, NULL, 0, 0);
 43         close(fd);
 44 
 45         unlink(path);
 46 
 47         return ret ? TEST_FAIL : 0;
 48 #else
 49         return TEST_SKIP;
 50 #endif
 51 }
 52 

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