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authorNick Clifton <nickc@redhat.com>2003-08-11 09:15:55 +0000
committerNick Clifton <nickc@redhat.com>2003-08-11 09:15:55 +0000
commitfb52b2f459b98125ab0cff0e16b421418541a8e1 (patch)
treee02dfe0201b1e6f7951f96c91c51fac13d0146f0 /binutils
parente561512e3673318ad2a6d9d4fda985ee18e532ff (diff)
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Add ability for readelf to parse archives
Diffstat (limited to 'binutils')
-rw-r--r--binutils/ChangeLog22
-rw-r--r--binutils/Makefile.am2
-rw-r--r--binutils/Makefile.in8
-rw-r--r--binutils/NEWS2
-rw-r--r--binutils/doc/binutils.texi5
-rw-r--r--binutils/readelf.c275
6 files changed, 272 insertions, 42 deletions
diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 7b8db96..e0e1d13 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,25 @@
+2003-08-11 Ian Lance Taylor <ian@airs.com>
+
+ * readelf.c: Add ability to read archives.
+ (archive_file_offset): New variable.
+ (archive_file_size): New variable.
+ (get_data): Include archive_file_offset in file offset
+ calculation when fseeking.
+ (process_program_headers): Likewise.
+ (process_symbol_table): Likewise.
+ (process_dynamic_segment): Handle computation of end of file
+ position when the file is in an archive.
+ (process_object): New function. Contains the body of
+ process_file().
+ (process_archive): New function. Call process_object on each
+ member of an archive.
+ (process_file): Detect archives and handle appropriately.
+ * Makefile.am: Add dependency on aout/ar.h for readelf.c
+ * Makefile.in: Regenerate.
+ * NEWS: Document readelf's new ability.
+ * doc/binutils: Alter text to say that readelf supports archives
+ and 64-bit ELF files.
+
2003-08-08 Nick Clifton <nickc@redhat.com>
* po/fr.po: Updated French translation.
diff --git a/binutils/Makefile.am b/binutils/Makefile.am
index 1d52738..63174e4 100644
--- a/binutils/Makefile.am
+++ b/binutils/Makefile.am
@@ -477,7 +477,7 @@ readelf.o: readelf.c ../bfd/bfd.h $(INCDIR)/ansidecl.h \
$(INCDIR)/elf/sparc.h $(INCDIR)/elf/v850.h $(INCDIR)/elf/vax.h \
$(INCDIR)/elf/x86-64.h $(INCDIR)/elf/xstormy16.h $(INCDIR)/elf/iq2000.h \
bucomm.h config.h $(INCDIR)/bin-bugs.h $(INCDIR)/fopen-same.h \
- unwind-ia64.h
+ unwind-ia64.h $(INCDIR)/aout/ar.h
rename.o: rename.c ../bfd/bfd.h $(INCDIR)/ansidecl.h \
$(INCDIR)/symcat.h bucomm.h config.h $(INCDIR)/bin-bugs.h \
$(INCDIR)/fopen-same.h
diff --git a/binutils/Makefile.in b/binutils/Makefile.in
index 7005f08..96c9176 100644
--- a/binutils/Makefile.in
+++ b/binutils/Makefile.in
@@ -1,4 +1,4 @@
-# Makefile.in generated automatically by automake 1.4-p6 from Makefile.am
+# Makefile.in generated automatically by automake 1.4-p5 from Makefile.am
# Copyright (C) 1994, 1995-8, 1999, 2001 Free Software Foundation, Inc.
# This Makefile.in is free software; the Free Software Foundation
@@ -442,7 +442,7 @@ configure.in deflex.c defparse.c nlmheader.c rclex.c rcparse.c
DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
-TAR = tar
+TAR = gtar
GZIP_ENV = --best
SOURCES = $(nlmconv_SOURCES) $(srconv_SOURCES) $(sysdump_SOURCES) $(coffdump_SOURCES) $(dlltool_SOURCES) $(windres_SOURCES) $(dllwrap_SOURCES) $(size_SOURCES) $(objdump_SOURCES) $(ar_SOURCES) $(strings_SOURCES) $(ranlib_SOURCES) $(objcopy_SOURCES) $(addr2line_SOURCES) $(readelf_SOURCES) $(nm_new_SOURCES) $(strip_new_SOURCES) $(cxxfilt_SOURCES)
OBJECTS = $(nlmconv_OBJECTS) $(srconv_OBJECTS) $(sysdump_OBJECTS) $(coffdump_OBJECTS) $(dlltool_OBJECTS) $(windres_OBJECTS) $(dllwrap_OBJECTS) $(size_OBJECTS) $(objdump_OBJECTS) $(ar_OBJECTS) $(strings_OBJECTS) $(ranlib_OBJECTS) $(objcopy_OBJECTS) $(addr2line_OBJECTS) $(readelf_OBJECTS) $(nm_new_OBJECTS) $(strip_new_OBJECTS) $(cxxfilt_OBJECTS)
@@ -870,7 +870,7 @@ distclean-generic:
-test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES)
maintainer-clean-generic:
- -test -z "arlex.cdeflex.crclex.carparse.harparse.cdefparse.hdefparse.cnlmheader.hnlmheader.crcparse.hrcparse.c" || rm -f arlex.c deflex.c rclex.c arparse.h arparse.c defparse.h defparse.c nlmheader.h nlmheader.c rcparse.h rcparse.c
+ -test -z "arlexldeflexlrclexlarparseharparsecdefparsehdefparsecnlmheaderhnlmheadercrcparsehrcparsec" || rm -f arlexl deflexl rclexl arparseh arparsec defparseh defparsec nlmheaderh nlmheaderc rcparseh rcparsec
mostlyclean-am: mostlyclean-hdr mostlyclean-binPROGRAMS \
mostlyclean-noinstPROGRAMS mostlyclean-compile \
mostlyclean-libtool mostlyclean-tags \
@@ -1205,7 +1205,7 @@ readelf.o: readelf.c ../bfd/bfd.h $(INCDIR)/ansidecl.h \
$(INCDIR)/elf/sparc.h $(INCDIR)/elf/v850.h $(INCDIR)/elf/vax.h \
$(INCDIR)/elf/x86-64.h $(INCDIR)/elf/xstormy16.h $(INCDIR)/elf/iq2000.h \
bucomm.h config.h $(INCDIR)/bin-bugs.h $(INCDIR)/fopen-same.h \
- unwind-ia64.h
+ unwind-ia64.h $(INCDIR)/aout/ar.h
rename.o: rename.c ../bfd/bfd.h $(INCDIR)/ansidecl.h \
$(INCDIR)/symcat.h bucomm.h config.h $(INCDIR)/bin-bugs.h \
$(INCDIR)/fopen-same.h
diff --git a/binutils/NEWS b/binutils/NEWS
index 0a8c0cf..3fa22e8 100644
--- a/binutils/NEWS
+++ b/binutils/NEWS
@@ -1,5 +1,7 @@
-*- text -*-
+* readelf can now parse archives.
+
* objdump now accepts --debugging-tags to print the debug information in a
format compatible with ctags tool.
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index f86169d..ce9dcf0 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -3078,9 +3078,8 @@ readelf [@option{-a}|@option{--all}]
@command{readelf} displays information about one or more ELF format object
files. The options control what particular information to display.
-@var{elffile}@dots{} are the object files to be examined. At the
-moment, @command{readelf} does not support examining archives, nor does it
-support examining 64 bit ELF files.
+@var{elffile}@dots{} are the object files to be examined. 32-bit and
+64-bit ELF files are supported, as are archives containing ELF files.
@c man end
diff --git a/binutils/readelf.c b/binutils/readelf.c
index b2366a6..25f5de6 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -90,11 +90,15 @@
#include "elf/iq2000.h"
#include "elf/xtensa.h"
+#include "aout/ar.h"
+
#include "bucomm.h"
#include "getopt.h"
#include "libiberty.h"
char *program_name = "readelf";
+long archive_file_offset;
+unsigned long archive_file_size;
unsigned long dynamic_addr;
bfd_size_type dynamic_size;
char *dynamic_strings;
@@ -244,9 +248,10 @@ get_data (void *var, FILE *file, long offset, size_t size, const char *reason)
if (size == 0)
return NULL;
- if (fseek (file, offset, SEEK_SET))
+ if (fseek (file, archive_file_offset + offset, SEEK_SET))
{
- error (_("Unable to seek to 0x%x for %s\n"), offset, reason);
+ error (_("Unable to seek to 0x%x for %s\n"),
+ archive_file_offset + offset, reason);
return NULL;
}
@@ -3064,7 +3069,8 @@ process_program_headers (FILE *file)
break;
case PT_INTERP:
- if (fseek (file, (long) segment->p_offset, SEEK_SET))
+ if (fseek (file, archive_file_offset + (long) segment->p_offset,
+ SEEK_SET))
error (_("Unable to find program interpreter name\n"));
else
{
@@ -4503,10 +4509,16 @@ process_dynamic_segment (FILE *file)
should work. */
section.sh_offset = offset_from_vma (file, entry->d_un.d_val, 0);
- if (fseek (file, 0, SEEK_END))
- error (_("Unable to seek to end of file!"));
+ if (archive_file_offset != 0)
+ section.sh_size = archive_file_size - section.sh_offset;
+ else
+ {
+ if (fseek (file, 0, SEEK_END))
+ error (_("Unable to seek to end of file!"));
+
+ section.sh_size = ftell (file) - section.sh_offset;
+ }
- section.sh_size = ftell (file) - section.sh_offset;
if (is_32bit_elf)
section.sh_entsize = sizeof (Elf32_External_Sym);
else
@@ -4544,9 +4556,15 @@ process_dynamic_segment (FILE *file)
should work. */
offset = offset_from_vma (file, entry->d_un.d_val, 0);
- if (fseek (file, 0, SEEK_END))
- error (_("Unable to seek to end of file\n"));
- str_tab_len = ftell (file) - offset;
+
+ if (archive_file_offset != 0)
+ str_tab_len = archive_file_size - offset;
+ else
+ {
+ if (fseek (file, 0, SEEK_END))
+ error (_("Unable to seek to end of file\n"));
+ str_tab_len = ftell (file) - offset;
+ }
if (str_tab_len < 1)
{
@@ -5598,8 +5616,10 @@ process_symbol_table (FILE *file)
if (dynamic_info[DT_HASH] && ((do_using_dynamic && dynamic_strings != NULL)
|| do_histogram))
{
- if (fseek (file, offset_from_vma (file, dynamic_info[DT_HASH],
- sizeof nb + sizeof nc),
+ if (fseek (file,
+ (archive_file_offset
+ + offset_from_vma (file, dynamic_info[DT_HASH],
+ sizeof nb + sizeof nc)),
SEEK_SET))
{
error (_("Unable to seek to start of dynamic information"));
@@ -10142,30 +10162,18 @@ get_file_header (FILE *file)
return 1;
}
+/* Process one ELF object file according to the command line options.
+ This file may actually be stored in an archive. The file is
+ positioned at the start of the ELF object. */
+
static int
-process_file (char *file_name)
+process_object (char *file_name, FILE *file)
{
- FILE *file;
- struct stat statbuf;
unsigned int i;
- if (stat (file_name, & statbuf) < 0)
- {
- error (_("Cannot stat input file %s.\n"), file_name);
- return 1;
- }
-
- file = fopen (file_name, "rb");
- if (file == NULL)
- {
- error (_("Input file %s not found.\n"), file_name);
- return 1;
- }
-
if (! get_file_header (file))
{
error (_("%s: Failed to read file header\n"), file_name);
- fclose (file);
return 1;
}
@@ -10181,10 +10189,7 @@ process_file (char *file_name)
printf (_("\nFile: %s\n"), file_name);
if (! process_file_header ())
- {
- fclose (file);
- return 1;
- }
+ return 1;
if (! process_section_headers (file))
{
@@ -10217,8 +10222,6 @@ process_file (char *file_name)
process_arch_specific (file);
- fclose (file);
-
if (program_headers)
{
free (program_headers);
@@ -10260,6 +10263,210 @@ process_file (char *file_name)
return 0;
}
+/* Process an ELF archive. The file is positioned just after the
+ ARMAG string. */
+
+static int
+process_archive (char *file_name, FILE *file)
+{
+ struct ar_hdr arhdr;
+ size_t got;
+ unsigned long size;
+ char *longnames = NULL;
+ unsigned long longnames_size = 0;
+ size_t file_name_size;
+
+ show_name = 1;
+
+ got = fread (&arhdr, 1, sizeof arhdr, file);
+ if (got != sizeof arhdr)
+ {
+ if (got == 0)
+ return 0;
+
+ error (_("%s: failed to read archive header\n"), file_name);
+ return 1;
+ }
+
+ if (memcmp (arhdr.ar_name, "/ ", 16) == 0)
+ {
+ /* This is the archive symbol table. Skip it.
+ FIXME: We should have an option to dump it. */
+ size = strtoul (arhdr.ar_size, NULL, 10);
+ if (fseek (file, size + (size & 1), SEEK_CUR) != 0)
+ {
+ error (_("%s: failed to skip archive symbol table\n"), file_name);
+ return 1;
+ }
+
+ got = fread (&arhdr, 1, sizeof arhdr, file);
+ if (got != sizeof arhdr)
+ {
+ if (got == 0)
+ return 0;
+
+ error (_("%s: failed to read archive header\n"), file_name);
+ return 1;
+ }
+ }
+
+ if (memcmp (arhdr.ar_name, "// ", 16) == 0)
+ {
+ /* This is the archive string table holding long member
+ names. */
+
+ longnames_size = strtoul (arhdr.ar_size, NULL, 10);
+
+ longnames = malloc (longnames_size);
+ if (longnames == NULL)
+ {
+ error (_("Out of memory\n"));
+ return 1;
+ }
+
+ if (fread (longnames, longnames_size, 1, file) != 1)
+ {
+ error(_("%s: failed to read string table\n"), file_name);
+ return 1;
+ }
+
+ if ((longnames_size & 1) != 0)
+ getc (file);
+
+ got = fread (&arhdr, 1, sizeof arhdr, file);
+ if (got != sizeof arhdr)
+ {
+ if (got == 0)
+ return 0;
+
+ error (_("%s: failed to read archive header\n"), file_name);
+ return 1;
+ }
+ }
+
+ file_name_size = strlen (file_name);
+
+ while (1)
+ {
+ char *name;
+ char *nameend;
+ char *namealc;
+
+ if (arhdr.ar_name[0] == '/')
+ {
+ unsigned long off;
+
+ off = strtoul (arhdr.ar_name + 1, NULL, 10);
+ if (off >= longnames_size)
+ {
+ error (_("%s: invalid archive string table offset %lu\n"), off);
+ return 1;
+ }
+
+ name = longnames + off;
+ nameend = memchr (name, '/', longnames_size - off);
+ }
+ else
+ {
+ name = arhdr.ar_name;
+ nameend = memchr (name, '/', 16);
+ }
+
+ if (nameend == NULL)
+ {
+ error (_("%s: bad archive file name\n"));
+ return 1;
+ }
+
+ namealc = malloc (file_name_size + (nameend - name) + 3);
+ if (namealc == NULL)
+ {
+ error (_("Out of memory\n"));
+ return 1;
+ }
+
+ memcpy (namealc, file_name, file_name_size);
+ namealc[file_name_size] = '(';
+ memcpy (namealc + file_name_size + 1, name, nameend - name);
+ namealc[file_name_size + 1 + (nameend - name)] = ')';
+ namealc[file_name_size + 2 + (nameend - name)] = '\0';
+
+ archive_file_offset = ftell (file);
+ archive_file_size = strtoul (arhdr.ar_size, NULL, 10);
+
+ process_object (namealc, file);
+
+ free (namealc);
+
+ if (fseek (file,
+ (archive_file_offset
+ + archive_file_size
+ + (archive_file_size & 1)),
+ SEEK_SET) != 0)
+ {
+ error (_("%s: failed to seek to next archive header\n"), file_name);
+ return 1;
+ }
+
+ got = fread (&arhdr, 1, sizeof arhdr, file);
+ if (got != sizeof arhdr)
+ {
+ if (got == 0)
+ return 0;
+
+ error (_("%s: failed to read archive header\n"), file_name);
+ return 1;
+ }
+ }
+
+ if (longnames != 0)
+ free (longnames);
+
+ return 0;
+}
+
+static int
+process_file (char *file_name)
+{
+ FILE *file;
+ struct stat statbuf;
+ char armag[SARMAG];
+ int ret;
+
+ if (stat (file_name, &statbuf) < 0)
+ {
+ error (_("Cannot stat input file %s.\n"), file_name);
+ return 1;
+ }
+
+ file = fopen (file_name, "rb");
+ if (file == NULL)
+ {
+ error (_("Input file %s not found.\n"), file_name);
+ return 1;
+ }
+
+ if (fread (armag, SARMAG, 1, file) != 1)
+ {
+ error (_("%s: Failed to read file header\n"), file_name);
+ fclose (file);
+ return 1;
+ }
+
+ if (memcmp (armag, ARMAG, SARMAG) == 0)
+ ret = process_archive (file_name, file);
+ else
+ {
+ rewind (file);
+ archive_file_size = archive_file_offset = 0;
+ ret = process_object (file_name, file);
+ }
+
+ fclose (file);
+
+ return ret;
+}
+
#ifdef SUPPORT_DISASSEMBLY
/* Needed by the i386 disassembler. For extra credit, someone could
fix this so that we insert symbolic addresses here, esp for GOT/PLT