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* elf.c (elfcore_write_note): Pad note descriptor to 4-byte

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boundary.  Tidy.  Comment.
This commit is contained in:
Alan Modra 2006-10-31 02:36:18 +00:00
parent ee9e139d63
commit a39f33461a
2 changed files with 29 additions and 23 deletions
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5
bfd/ChangeLog
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@ -1,4 +1,7 @@
bfd/
2006-10-31 Alan Modra <amodra@bigpond.net.au>
* elf.c (elfcore_write_note): Pad note descriptor to 4-byte
boundary. Tidy. Comment.
2006-10-30 H.J. Lu <hongjiu.lu@intel.com>

47
bfd/elf.c
View File

@ -8088,45 +8088,42 @@ elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
/* Function: elfcore_write_note
Inputs:
buffer to hold note
buffer to hold note, and current size of buffer
name of note
type of note
data for note
size of data for note
Writes note to end of buffer. ELF64 notes are written exactly as
for ELF32, despite the current (as of 2006) ELF gabi specifying
that they ought to have 8-byte namesz and descsz field, and have
8-byte alignment. Other writers, eg. Linux kernel, do the same.
Return:
End of buffer containing note. */
Pointer to realloc'd buffer, *BUFSIZ updated. */
char *
elfcore_write_note (bfd *abfd,
elfcore_write_note (bfd *abfd,
char *buf,
int *bufsiz,
int *bufsiz,
const char *name,
int type,
int type,
const void *input,
int size)
int size)
{
Elf_External_Note *xnp;
size_t namesz;
size_t pad;
size_t newspace;
char *p, *dest;
char *dest;
namesz = 0;
pad = 0;
if (name != NULL)
{
const struct elf_backend_data *bed;
namesz = strlen (name) + 1;
namesz = strlen (name) + 1;
bed = get_elf_backend_data (abfd);
pad = -namesz & 3;
}
newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
newspace = 12 + namesz + pad + size;
p = realloc (buf, *bufsiz + newspace);
dest = p + *bufsiz;
buf = realloc (buf, *bufsiz + newspace);
dest = buf + *bufsiz;
*bufsiz += newspace;
xnp = (Elf_External_Note *) dest;
H_PUT_32 (abfd, namesz, xnp->namesz);
@ -8137,14 +8134,20 @@ elfcore_write_note (bfd *abfd,
{
memcpy (dest, name, namesz);
dest += namesz;
while (pad != 0)
while (namesz & 3)
{
*dest++ = '\0';
--pad;
++namesz;
}
}
memcpy (dest, input, size);
return p;
dest += size;
while (size & 3)
{
*dest++ = '\0';
++size;
}
return buf;
}
#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)