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objdump: get CTF parent importing right

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The linker emits CTF into a single section named .ctf, which is a CTF
archive where the default member (itself named ".ctf", or simply NULL)
is the parent of all other members.  Teach objdump to look for this by
default, rather than only trying to do it if a specific CTF parent
section was specified.  (If no parent name is specified, we get the .ctf
member from the same section as everything else, which matches what the
linker generates.)

binutils/
	* objdump.c (dump_ctf): Use the default CTF archive member as the
	parent even when no parent section is specified.
	(dump_ctf_archive_member): Only import from the parent
	if this is not the default ".ctf" member.
This commit is contained in:
Nick Alcock 2019-08-03 00:41:05 +01:00
parent 87279e3cef
commit fd86991bc5
3 changed files with 34 additions and 15 deletions
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7
binutils/ChangeLog
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@ -1,3 +1,10 @@
2019-08-03 Nick Alcock <nick.alcock@oracle.com>
* objdump.c (dump_ctf): Use the default CTF archive member as the
parent even when no parent section is specified.
(dump_ctf_archive_member): Only import from the parent
if this is not the default ".ctf" member.
2019-09-23 Nick Alcock <nick.alcock@oracle.com>
* Makefile.am (LIBCTF): Mention the .la file.

5
binutils/doc/ctf.options.texi
View File

@ -10,5 +10,6 @@ contain many subsections, all of which are displayed in order.
@item --ctf-parent=@var{section}
Specify the name of another section from which the CTF file can inherit
types.
Specify the name of another section from which the CTF dictionary can inherit
types. (If none is specified, we assume the CTF dictionary inherits types
from the default-named member of the archive contained within this section.)

37
binutils/objdump.c
View File

@ -3290,11 +3290,18 @@ dump_ctf_archive_member (ctf_file_t *ctf, const char *name, void *arg)
/* Only print out the name of non-default-named archive members.
The name .ctf appears everywhere, even for things that aren't
really archives, so printing it out is liable to be confusing. */
if (strcmp (name, ".ctf") != 0)
printf (_("\nCTF archive member: %s:\n"), sanitize_string (name));
really archives, so printing it out is liable to be confusing.
The parent, if there is one, is the default-owned archive member:
avoid importing it into itself. (This does no harm, but looks
confusing.) */
if (strcmp (name, ".ctf") != 0)
{
printf (_("\nCTF archive member: %s:\n"), sanitize_string (name));
ctf_import (ctf, parent);
}
ctf_import (ctf, parent);
for (i = 0, thing = things; *thing[0]; thing++, i++)
{
ctf_dump_state_t *s = NULL;
@ -3323,7 +3330,7 @@ dump_ctf_archive_member (ctf_file_t *ctf, const char *name, void *arg)
static void
dump_ctf (bfd *abfd, const char *sect_name, const char *parent_name)
{
ctf_archive_t *ctfa, *parenta = NULL;
ctf_archive_t *ctfa, *parenta = NULL, *lookparent;
bfd_byte *ctfdata, *parentdata = NULL;
bfd_size_type ctfsize, parentsize;
ctf_sect_t ctfsect;
@ -3356,14 +3363,18 @@ dump_ctf (bfd *abfd, const char *sect_name, const char *parent_name)
bfd_fatal (bfd_get_filename (abfd));
}
/* Assume that the applicable parent archive member is the default one.
(This is what all known implementations are expected to do, if they
put CTFs and their parents in archives together.) */
if ((parent = ctf_arc_open_by_name (parenta, NULL, &err)) == NULL)
{
non_fatal (_("CTF open failure: %s\n"), ctf_errmsg (err));
bfd_fatal (bfd_get_filename (abfd));
}
lookparent = parenta;
}
else
lookparent = ctfa;
/* Assume that the applicable parent archive member is the default one.
(This is what all known implementations are expected to do, if they
put CTFs and their parents in archives together.) */
if ((parent = ctf_arc_open_by_name (lookparent, NULL, &err)) == NULL)
{
non_fatal (_("CTF open failure: %s\n"), ctf_errmsg (err));
bfd_fatal (bfd_get_filename (abfd));
}
printf (_("Contents of CTF section %s:\n"), sanitize_string (sect_name));