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Recognise ECOFF armap in bfd_slurp_armap

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Recognise ECOFF archives and reject them so that the ecoff archive
support has a chance to handle the archive.  Also use memcmp rather
than startswith (strncmp) as we know the string length.

	* archive.c (bfd_slurp_armap): Recognize ECOFF armap.  Use memcmp
	to match names, and tidy buffer sizes.
This commit is contained in:
Alan Modra
2025-08-13 22:35:53 +09:30
parent 9adb8ba865
commit b3f31f8eea
1 changed files with 24 additions and 10 deletions
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34
bfd/archive.c
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@@ -1189,7 +1189,7 @@ do_slurp_coff_armap (bfd *abfd)
bool
bfd_slurp_armap (bfd *abfd)
{
char nextname[17];
char nextname[16];
int i = bfd_read (nextname, 16, abfd);
if (i == 0)
@@ -1200,12 +1200,13 @@ bfd_slurp_armap (bfd *abfd)
if (bfd_seek (abfd, -16, SEEK_CUR) != 0)
return false;
if (startswith (nextname, "__.SYMDEF ")
|| startswith (nextname, "__.SYMDEF/ ")) /* Old Linux archives. */
if (memcmp (nextname, "__.SYMDEF ", 16) == 0
/* Old Linux archives. */
|| memcmp (nextname, "__.SYMDEF/ ", 16) == 0)
return do_slurp_bsd_armap (abfd);
else if (startswith (nextname, "/ "))
else if (memcmp (nextname, "/ ", 16) == 0)
return do_slurp_coff_armap (abfd);
else if (startswith (nextname, "/SYM64/ "))
else if (memcmp (nextname, "/SYM64/ ", 16) == 0)
{
/* 64bit (Irix 6) archive. */
#ifdef BFD64
@@ -1215,13 +1216,27 @@ bfd_slurp_armap (bfd *abfd)
return false;
#endif
}
else if (startswith (nextname, "#1/20 "))
else if (memcmp (nextname, "________", 8) == 0
&& ((nextname[8] == '_' && nextname[9] == '_')
|| (nextname[8] == '6' && nextname[9] == '4'))
&& nextname[10] == 'E'
&& (nextname[11] == 'B' || nextname[11] == 'L')
&& nextname[12] == 'E'
&& (nextname[13] == 'B' || nextname[13] == 'L')
&& nextname[14] == '_'
&& (nextname[15] == ' ' || nextname[15] == 'X'))
{
/* ECOFF archive. */
bfd_set_error (bfd_error_wrong_format);
return false;
}
else if (memcmp (nextname, "#1/20 ", 16) == 0)
{
/* Mach-O has a special name for armap when the map is sorted by name.
However because this name has a space it is slightly more difficult
to check it. */
struct ar_hdr hdr;
char extname[21];
char extname[20];
if (bfd_read (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
return false;
@@ -1230,9 +1245,8 @@ bfd_slurp_armap (bfd *abfd)
return false;
if (bfd_seek (abfd, -(file_ptr) (sizeof (hdr) + 20), SEEK_CUR) != 0)
return false;
extname[20] = 0;
if (startswith (extname, "__.SYMDEF SORTED")
|| startswith (extname, "__.SYMDEF"))
if (memcmp (extname, "__.SYMDEF SORTED", 16) == 0
|| memcmp (extname, "__.SYMDEF", 9) == 0)
return do_slurp_bsd_armap (abfd);
}