Coverage Report

Created: 2026-09-07 06:08

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/src/elfutils/libelf/elf32_xlatetom.c
Line
Count
Source
1
/* Convert from file to memory representation.
2
   Copyright (C) 1998, 1999, 2000, 2002, 2012, 2015 Red Hat, Inc.
3
   This file is part of elfutils.
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   Written by Ulrich Drepper <drepper@redhat.com>, 1998.
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   This file is free software; you can redistribute it and/or modify
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   it under the terms of either
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9
     * the GNU Lesser General Public License as published by the Free
10
       Software Foundation; either version 3 of the License, or (at
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       your option) any later version
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   or
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     * the GNU General Public License as published by the Free
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       Software Foundation; either version 2 of the License, or (at
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       your option) any later version
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   or both in parallel, as here.
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   elfutils is distributed in the hope that it will be useful, but
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   WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   General Public License for more details.
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   You should have received copies of the GNU General Public License and
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   the GNU Lesser General Public License along with this program.  If
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   not, see <http://www.gnu.org/licenses/>.  */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <string.h>
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#include "libelfP.h"
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#ifndef LIBELFBITS
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# define LIBELFBITS 32
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#endif
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Elf_Data *
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elfw2(LIBELFBITS, xlatetom) (Elf_Data *dest, const Elf_Data *src,
46
           unsigned int encode)
47
97
{
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
97
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
55
  /* We shouldn't require integer number of records when processing
56
     notes.  Payload bytes follow the header immediately, it's not an
57
     array of records as is the case otherwise.  */
58
97
  if (src->d_type != ELF_T_NHDR && src->d_type != ELF_T_NHDR8
59
97
      && src->d_size % recsize != 0)
60
0
    {
61
0
      __libelf_seterrno (ELF_E_INVALID_DATA);
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0
      return NULL;
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0
    }
64
65
  /* Next see whether the converted data fits in the output buffer.  */
66
97
  if (src->d_size > dest->d_size)
67
0
    {
68
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
69
0
      return NULL;
70
0
    }
71
72
  /* Test the encode parameter.  */
73
97
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
74
0
    {
75
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
76
0
      return NULL;
77
0
    }
78
79
  /* Determine the translation function to use.
80
81
     At this point we make an assumption which is valid for all
82
     existing implementations so far: the memory and file sizes are
83
     the same.  This has very important consequences:
84
     a) The requirement that the source and destination buffer can
85
  overlap can easily be fulfilled.
86
     b) We need only one function to convert from and memory to file
87
  and vice versa since the function only has to copy and/or
88
  change the byte order.
89
  */
90
97
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
91
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
92
66
    {
93
      /* We simply have to copy since the byte order is the same.  */
94
66
      if (src->d_buf != dest->d_buf)
95
66
  memmove (dest->d_buf, src->d_buf, src->d_size);
96
66
    }
97
31
  else
98
31
    {
99
31
      xfct_t fctp;
100
31
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
101
102
      /* Do the real work.  */
103
31
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 0);
104
31
    }
105
106
  /* Now set the real destination type and length since the operation was
107
     successful.  */
108
97
  dest->d_type = src->d_type;
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97
  dest->d_size = src->d_size;
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111
97
  return dest;
112
97
}
elf64_xlatetom
Line
Count
Source
47
2
{
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
2
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
55
  /* We shouldn't require integer number of records when processing
56
     notes.  Payload bytes follow the header immediately, it's not an
57
     array of records as is the case otherwise.  */
58
2
  if (src->d_type != ELF_T_NHDR && src->d_type != ELF_T_NHDR8
59
2
      && src->d_size % recsize != 0)
60
0
    {
61
0
      __libelf_seterrno (ELF_E_INVALID_DATA);
62
0
      return NULL;
63
0
    }
64
65
  /* Next see whether the converted data fits in the output buffer.  */
66
2
  if (src->d_size > dest->d_size)
67
0
    {
68
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
69
0
      return NULL;
70
0
    }
71
72
  /* Test the encode parameter.  */
73
2
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
74
0
    {
75
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
76
0
      return NULL;
77
0
    }
78
79
  /* Determine the translation function to use.
80
81
     At this point we make an assumption which is valid for all
82
     existing implementations so far: the memory and file sizes are
83
     the same.  This has very important consequences:
84
     a) The requirement that the source and destination buffer can
85
  overlap can easily be fulfilled.
86
     b) We need only one function to convert from and memory to file
87
  and vice versa since the function only has to copy and/or
88
  change the byte order.
89
  */
90
2
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
91
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
92
1
    {
93
      /* We simply have to copy since the byte order is the same.  */
94
1
      if (src->d_buf != dest->d_buf)
95
1
  memmove (dest->d_buf, src->d_buf, src->d_size);
96
1
    }
97
1
  else
98
1
    {
99
1
      xfct_t fctp;
100
1
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
101
102
      /* Do the real work.  */
103
1
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 0);
104
1
    }
105
106
  /* Now set the real destination type and length since the operation was
107
     successful.  */
108
2
  dest->d_type = src->d_type;
109
2
  dest->d_size = src->d_size;
110
111
2
  return dest;
112
2
}
elf32_xlatetom
Line
Count
Source
47
95
{
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
95
  size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
53
54
55
  /* We shouldn't require integer number of records when processing
56
     notes.  Payload bytes follow the header immediately, it's not an
57
     array of records as is the case otherwise.  */
58
95
  if (src->d_type != ELF_T_NHDR && src->d_type != ELF_T_NHDR8
59
95
      && src->d_size % recsize != 0)
60
0
    {
61
0
      __libelf_seterrno (ELF_E_INVALID_DATA);
62
0
      return NULL;
63
0
    }
64
65
  /* Next see whether the converted data fits in the output buffer.  */
66
95
  if (src->d_size > dest->d_size)
67
0
    {
68
0
      __libelf_seterrno (ELF_E_DEST_SIZE);
69
0
      return NULL;
70
0
    }
71
72
  /* Test the encode parameter.  */
73
95
  if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
74
0
    {
75
0
      __libelf_seterrno (ELF_E_INVALID_ENCODING);
76
0
      return NULL;
77
0
    }
78
79
  /* Determine the translation function to use.
80
81
     At this point we make an assumption which is valid for all
82
     existing implementations so far: the memory and file sizes are
83
     the same.  This has very important consequences:
84
     a) The requirement that the source and destination buffer can
85
  overlap can easily be fulfilled.
86
     b) We need only one function to convert from and memory to file
87
  and vice versa since the function only has to copy and/or
88
  change the byte order.
89
  */
90
95
  if ((BYTE_ORDER == LITTLE_ENDIAN && encode == ELFDATA2LSB)
91
0
      || (BYTE_ORDER == BIG_ENDIAN && encode == ELFDATA2MSB))
92
65
    {
93
      /* We simply have to copy since the byte order is the same.  */
94
65
      if (src->d_buf != dest->d_buf)
95
65
  memmove (dest->d_buf, src->d_buf, src->d_size);
96
65
    }
97
30
  else
98
30
    {
99
30
      xfct_t fctp;
100
30
      fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
101
102
      /* Do the real work.  */
103
30
      (*fctp) (dest->d_buf, src->d_buf, src->d_size, 0);
104
30
    }
105
106
  /* Now set the real destination type and length since the operation was
107
     successful.  */
108
95
  dest->d_type = src->d_type;
109
95
  dest->d_size = src->d_size;
110
111
95
  return dest;
112
95
}
113
INTDEF(elfw2(LIBELFBITS, xlatetom))