1/* be-flipping.c -- Test for handling different endianness in libsframe.
2
3   Copyright (C) 2022 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include "config.h"
19
20#include <stdio.h>
21#include <stdlib.h>
22#include <sys/stat.h>
23
24#include "sframe-api.h"
25
26/* DejaGnu should not use gnulib's vsnprintf replacement here.  */
27#undef vsnprintf
28#include <dejagnu.h>
29
30/* SFrame info from the following source (1 fde 5 fres):
31   static int cnt;
32   extern void foo (void);
33
34   int bar()
35   {
36     cnt++;
37     if (cnt == 3)
38       foo();
39    return (cnt);
40  }
41  gcc -mbig-endian -Wa,--gsframe -c -O3 t.c
42  objcopy --dump-section .sframe=DATA-BE t.o
43 */
44#define DATA	"DATA-BE"
45
46int
47main (void)
48{
49  sframe_decoder_ctx *dctx = NULL;
50  uint32_t nfres, fsize;
51  int32_t fstart;
52  unsigned char finfo;
53  int err = 0;
54  FILE *fp;
55  struct stat st;
56  char *sf_buf;
57  size_t sf_size;
58
59#define TEST(name, cond)                                                      \
60  do                                                                          \
61    {                                                                         \
62      if (cond)                                                               \
63	pass (name);                                                          \
64      else                                                                    \
65	fail (name);                                                          \
66    }                                                                         \
67    while (0)
68
69  /* Test setup.  */
70  fp = fopen (DATA, "r");
71  if (fp == NULL)
72    goto setup_fail;
73  if (fstat (fileno (fp), &st) < 0)
74    {
75      perror ("fstat");
76      fclose (fp);
77      goto setup_fail;
78    }
79  sf_buf = malloc (st.st_size);
80  if (sf_buf == NULL)
81    {
82      perror ("malloc");
83      goto setup_fail;
84    }
85  sf_size = fread (sf_buf, 1, st.st_size, fp);
86  fclose (fp);
87  if (sf_size == 0)
88    {
89      fprintf (stderr, "Decode: Read buffer failed\n");
90      goto setup_fail;
91    }
92
93  /* Execute tests.  */
94
95  /* Call to sframe_decode will endian flip the input buffer (big-endian) if
96     the host running the test is a little-endian system.  This endian-flipped
97     copy of the buffer is kept internally in dctx.  */
98  dctx = sframe_decode (sf_buf, sf_size, &err);
99  TEST ("be-flipping: Decoder setup", dctx != NULL);
100
101  unsigned int fde_cnt = sframe_decoder_get_num_fidx (dctx);
102  TEST ("be-flipping: Decoder FDE count", fde_cnt == 1);
103
104  err = sframe_decoder_get_funcdesc (dctx, 0, &nfres, &fsize, &fstart, &finfo);
105  TEST ("be-flipping: Decoder get FDE", err == 0);
106  TEST ("be-flipping: Decoder FRE count", nfres == 5);
107
108  sframe_decoder_free (&dctx);
109  return 0;
110
111setup_fail:
112  sframe_decoder_free (&dctx);
113  fail ("be-flipping: Test setup");
114  return 1;
115}
116