Coverage Report

Created: 2026-09-01 06:28

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/src/elfutils/libelf/elf32_xlatetof.c
Line
Count
Source
1
/* Convert from memory to file representation.
2
   Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
3
   This file is part of elfutils.
4
   Written by Ulrich Drepper <drepper@redhat.com>, 1998.
5
6
   This file is free software; you can redistribute it and/or modify
7
   it under the terms of either
8
9
     * the GNU Lesser General Public License as published by the Free
10
       Software Foundation; either version 3 of the License, or (at
11
       your option) any later version
12
13
   or
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15
     * the GNU General Public License as published by the Free
16
       Software Foundation; either version 2 of the License, or (at
17
       your option) any later version
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   or both in parallel, as here.
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21
   elfutils is distributed in the hope that it will be useful, but
22
   WITHOUT ANY WARRANTY; without even the implied warranty of
23
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
24
   General Public License for more details.
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26
   You should have received copies of the GNU General Public License and
27
   the GNU Lesser General Public License along with this program.  If
28
   not, see <http://www.gnu.org/licenses/>.  */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
32
#endif
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34
#include <assert.h>
35
#include <string.h>
36
37
#include "libelfP.h"
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39
#ifndef LIBELFBITS
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# define LIBELFBITS 32
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#endif
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43
44
Elf_Data *
45
elfw2(LIBELFBITS, xlatetof) (Elf_Data *dest, const Elf_Data *src,
46
           unsigned int encode)
47
12.4k
{
48
  /* First test whether the input data is really suitable for this
49
     type.  This means, whether there is an integer number of records.
50
     Note that for this implementation the memory and file size of the
51
     data types are identical.  */
52
12.4k
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
12.4k
  if (src->d_size % recsize != 0)
55
5.11k
    {
56
5.11k
      __libelf_seterrno (ELF_E_INVALID_DATA);
57
5.11k
      return NULL;
58
5.11k
    }
59
60
  /* Next see whether the converted data fits in the output buffer.  */
61
7.32k
  if (src->d_size > dest->d_size)
62
0
    {
63
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
64
0
      return NULL;
65
0
    }
66
67
  /* Test the encode parameter.  */
68
7.32k
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
69
0
    {
70
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
71
0
      return NULL;
72
0
    }
73
74
  /* Determine the translation function to use.
75
76
     At this point we make an assumption which is valid for all
77
     existing implementations so far: the memory and file sizes are
78
     the same.  This has very important consequences:
79
     a) The requirement that the source and destination buffer can
80
  overlap can easily be fulfilled.
81
     b) We need only one function to convert from and memory to file
82
  and vice versa since the function only has to copy and/or
83
  change the byte order.
84
  */
85
7.32k
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
86
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
87
0
    {
88
      /* We simply have to copy since the byte order is the same.  */
89
0
      if (src->d_buf != dest->d_buf)
90
0
  memmove (dest->d_buf, src->d_buf, src->d_size);
91
0
    }
92
7.32k
  else
93
7.32k
    {
94
7.32k
      xfct_t fctp;
95
7.32k
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
96
97
      /* Do the real work.  */
98
7.32k
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 1);
99
7.32k
    }
100
101
  /* Now set the real destination type and length since the operation was
102
     successful.  */
103
7.32k
  dest->d_type = src->d_type;
104
7.32k
  dest->d_size = src->d_size;
105
106
7.32k
  return dest;
107
7.32k
}
elf32_xlatetof
Line
Count
Source
47
11.5k
{
48
  /* First test whether the input data is really suitable for this
49
     type.  This means, whether there is an integer number of records.
50
     Note that for this implementation the memory and file size of the
51
     data types are identical.  */
52
11.5k
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
11.5k
  if (src->d_size % recsize != 0)
55
4.47k
    {
56
4.47k
      __libelf_seterrno (ELF_E_INVALID_DATA);
57
4.47k
      return NULL;
58
4.47k
    }
59
60
  /* Next see whether the converted data fits in the output buffer.  */
61
7.11k
  if (src->d_size > dest->d_size)
62
0
    {
63
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
64
0
      return NULL;
65
0
    }
66
67
  /* Test the encode parameter.  */
68
7.11k
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
69
0
    {
70
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
71
0
      return NULL;
72
0
    }
73
74
  /* Determine the translation function to use.
75
76
     At this point we make an assumption which is valid for all
77
     existing implementations so far: the memory and file sizes are
78
     the same.  This has very important consequences:
79
     a) The requirement that the source and destination buffer can
80
  overlap can easily be fulfilled.
81
     b) We need only one function to convert from and memory to file
82
  and vice versa since the function only has to copy and/or
83
  change the byte order.
84
  */
85
7.11k
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
86
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
87
0
    {
88
      /* We simply have to copy since the byte order is the same.  */
89
0
      if (src->d_buf != dest->d_buf)
90
0
  memmove (dest->d_buf, src->d_buf, src->d_size);
91
0
    }
92
7.11k
  else
93
7.11k
    {
94
7.11k
      xfct_t fctp;
95
7.11k
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
96
97
      /* Do the real work.  */
98
7.11k
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 1);
99
7.11k
    }
100
101
  /* Now set the real destination type and length since the operation was
102
     successful.  */
103
7.11k
  dest->d_type = src->d_type;
104
7.11k
  dest->d_size = src->d_size;
105
106
7.11k
  return dest;
107
7.11k
}
elf64_xlatetof
Line
Count
Source
47
848
{
48
  /* First test whether the input data is really suitable for this
49
     type.  This means, whether there is an integer number of records.
50
     Note that for this implementation the memory and file size of the
51
     data types are identical.  */
52
848
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
848
  if (src->d_size % recsize != 0)
55
639
    {
56
639
      __libelf_seterrno (ELF_E_INVALID_DATA);
57
639
      return NULL;
58
639
    }
59
60
  /* Next see whether the converted data fits in the output buffer.  */
61
209
  if (src->d_size > dest->d_size)
62
0
    {
63
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
64
0
      return NULL;
65
0
    }
66
67
  /* Test the encode parameter.  */
68
209
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
69
0
    {
70
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
71
0
      return NULL;
72
0
    }
73
74
  /* Determine the translation function to use.
75
76
     At this point we make an assumption which is valid for all
77
     existing implementations so far: the memory and file sizes are
78
     the same.  This has very important consequences:
79
     a) The requirement that the source and destination buffer can
80
  overlap can easily be fulfilled.
81
     b) We need only one function to convert from and memory to file
82
  and vice versa since the function only has to copy and/or
83
  change the byte order.
84
  */
85
209
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
86
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
87
0
    {
88
      /* We simply have to copy since the byte order is the same.  */
89
0
      if (src->d_buf != dest->d_buf)
90
0
  memmove (dest->d_buf, src->d_buf, src->d_size);
91
0
    }
92
209
  else
93
209
    {
94
209
      xfct_t fctp;
95
209
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
96
97
      /* Do the real work.  */
98
209
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 1);
99
209
    }
100
101
  /* Now set the real destination type and length since the operation was
102
     successful.  */
103
209
  dest->d_type = src->d_type;
104
209
  dest->d_size = src->d_size;
105
106
209
  return dest;
107
209
}
108
INTDEF(elfw2(LIBELFBITS, xlatetof))