1  /* be-flipping.c -- Test for handling different endianness in libsframe.
       2  
       3     Copyright (C) 2022-2023 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  
      46  int
      47  main (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    free (sf_buf);
     109    sf_buf = NULL;
     110        
     111    sframe_decoder_free (&dctx);
     112    return 0;
     113  
     114  setup_fail:
     115    sframe_decoder_free (&dctx);
     116    fail ("be-flipping: Test setup");
     117    return 1;
     118  }