* BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
@ 2005-01-24 21:51 Andrew Cagney
2005-01-24 21:53 ` Ian Lance Taylor
2005-01-25 9:54 ` Alan Modra
0 siblings, 2 replies; 6+ messages in thread
From: Andrew Cagney @ 2005-01-24 21:51 UTC (permalink / raw)
To: binutils
Hello,
On 32-bit PPC GNU/Linux when running:
$ nm --synthetic ...
BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol
index 1
10010900 ? *ABS*@plt
10010918 B bar
.
.
.
I'm seeing the above (and similar on i386, ....). Is this valid?
Andrew
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
2005-01-24 21:51 BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1 Andrew Cagney
@ 2005-01-24 21:53 ` Ian Lance Taylor
2005-01-24 22:24 ` Andrew Cagney
2005-01-25 9:54 ` Alan Modra
1 sibling, 1 reply; 6+ messages in thread
From: Ian Lance Taylor @ 2005-01-24 21:53 UTC (permalink / raw)
To: Andrew Cagney; +Cc: binutils
Andrew Cagney <cagney@gnu.org> writes:
> On 32-bit PPC GNU/Linux when running:
>
> $ nm --synthetic ...
> BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid
> symbol index 1
> 10010900 ? *ABS*@plt
> 10010918 B bar
> .
> .
> .
>
> I'm seeing the above (and similar on i386, ....). Is this valid?
Probably not. However, you will get better information, and a more
reliable answer, if you provide output from objdump -t and readelf -s.
Ian
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
2005-01-24 21:53 ` Ian Lance Taylor
@ 2005-01-24 22:24 ` Andrew Cagney
0 siblings, 0 replies; 6+ messages in thread
From: Andrew Cagney @ 2005-01-24 22:24 UTC (permalink / raw)
To: Ian Lance Taylor; +Cc: binutils
[-- Attachment #1: Type: text/plain, Size: 555 bytes --]
Ian Lance Taylor wrote:
> Andrew Cagney <cagney@gnu.org> writes:
>
>
>>On 32-bit PPC GNU/Linux when running:
>>
>>$ nm --synthetic ...
>>BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid
>>symbol index 1
>>10010900 ? *ABS*@plt
>>10010918 B bar
>>.
>>.
>>.
>>
>>I'm seeing the above (and similar on i386, ....). Is this valid?
>
>
> Probably not. However, you will get better information, and a more
> reliable answer, if you provide output from objdump -t and readelf -s.
Both attached (but they don't issue the warning :-).
Andrew
[-- Attachment #2: objdump-t --]
[-- Type: text/plain, Size: 11603 bytes --]
/home/cagney/tmp/a.out: file format elf32-powerpc
SYMBOL TABLE:
10000134 l d .interp 00000000 .interp
10000144 l d .note.ABI-tag 00000000 .note.ABI-tag
10000164 l d .hash 00000000 .hash
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[-- Attachment #3: readelf-s --]
[-- Type: text/plain, Size: 12827 bytes --]
Symbol table '.dynsym' contains 5 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 10010900 464 FUNC GLOBAL DEFAULT UND __libc_start_main@GLIBC_2.0 (2)
2: 100007a8 4 OBJECT GLOBAL DEFAULT 13 _IO_stdin_used
3: 00000000 0 NOTYPE WEAK DEFAULT UND _Jv_RegisterClasses
4: 00000000 0 NOTYPE WEAK DEFAULT UND __gmon_start__
Symbol table '.symtab' contains 199 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 10000134 0 SECTION LOCAL DEFAULT 1
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181: 100005bc 12 FUNC GLOBAL DEFAULT 11 _savegpr_30
182: 100006d4 60 FUNC GLOBAL DEFAULT 11 _restgpr_21_x
183: 10000654 12 FUNC GLOBAL DEFAULT 11 _restgpr_30
184: 10000680 56 FUNC GLOBAL DEFAULT 11 _restfpr_22_x
185: 100006c0 80 FUNC GLOBAL DEFAULT 11 _restgpr_16_x
186: 100006ec 36 FUNC GLOBAL DEFAULT 11 _restgpr_27_x
187: 1000059c 44 FUNC GLOBAL DEFAULT 11 _savegpr_22
188: 1001089c 0 NOTYPE GLOBAL DEFAULT 21 __data_start
189: 1000061c 68 FUNC GLOBAL DEFAULT 11 _restgpr_16
190: 00000000 0 NOTYPE WEAK DEFAULT UND _Jv_RegisterClasses
191: 100107b0 0 NOTYPE GLOBAL HIDDEN ABS __preinit_array_start
192: 10000638 40 FUNC GLOBAL DEFAULT 11 _restgpr_23
193: 100087ac 0 OBJECT GLOBAL DEFAULT 14 _SDA2_BASE_
194: 10000620 64 FUNC GLOBAL DEFAULT 11 _restgpr_17
195: 10000560 28 FUNC GLOBAL DEFAULT 11 _savefpr_26
196: 100006d0 64 FUNC GLOBAL DEFAULT 11 _restgpr_20_x
197: 1000060c 8 FUNC GLOBAL DEFAULT 11 _restfpr_31
198: 00000000 0 NOTYPE WEAK DEFAULT UND __gmon_start__
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
2005-01-24 21:51 BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1 Andrew Cagney
2005-01-24 21:53 ` Ian Lance Taylor
@ 2005-01-25 9:54 ` Alan Modra
2005-01-25 10:30 ` Alan Modra
1 sibling, 1 reply; 6+ messages in thread
From: Alan Modra @ 2005-01-25 9:54 UTC (permalink / raw)
To: Andrew Cagney; +Cc: binutils
On Mon, Jan 24, 2005 at 04:51:12PM -0500, Andrew Cagney wrote:
> $ nm --synthetic ...
> BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol
> index 1
> 10010900 ? *ABS*@plt
> 10010918 B bar
It's a bug. _bfd_elf_get_synthetic_symtab is trying to slurp dynamic
relocs before the dynamic symbol table has been read.
"nm -D --synthetic" works. It looks like "nm --synthetic" is supposed
to work too. Oh well, fixing.
--
Alan Modra
IBM OzLabs - Linux Technology Centre
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
2005-01-25 9:54 ` Alan Modra
@ 2005-01-25 10:30 ` Alan Modra
2005-01-26 20:33 ` Andrew Cagney
0 siblings, 1 reply; 6+ messages in thread
From: Alan Modra @ 2005-01-25 10:30 UTC (permalink / raw)
To: Andrew Cagney, binutils
On Tue, Jan 25, 2005 at 08:23:59PM +1030, Alan Modra wrote:
> On Mon, Jan 24, 2005 at 04:51:12PM -0500, Andrew Cagney wrote:
> > $ nm --synthetic ...
> > BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol
> > index 1
> > 10010900 ? *ABS*@plt
> > 10010918 B bar
>
> It's a bug. _bfd_elf_get_synthetic_symtab is trying to slurp dynamic
> relocs before the dynamic symbol table has been read.
>
> "nm -D --synthetic" works. It looks like "nm --synthetic" is supposed
> to work too. Oh well, fixing.
As well as fixing the above, I've restricted the relocs returned by
_bfd_elf_canonicalize_dynamic_reloc to those for loadable sections.
The idea is to exclude debug relocs, and any other weird stuff that
generally isn't of interest for "objdump -dR". I see gdb makes
calls to bfd_canonicalize_dynamic_reloc too, but I think gdb/dbxread.c
and gdb/solib-frv.c aren't interested in debug relocs either.
bfd/
* elf.c (_bfd_elf_get_dynamic_reloc_upper_bound): Only include
loadable reloc sections.
(_bfd_elf_canonicalize_dynamic_reloc): Likewise.
(_bfd_elf_get_synthetic_symtab): Return 0 if no dynamic syms.
binutils/
* nm.c (display_rel_file): Read dynamic syms before calling
bfd_get_synthetic_symtab.
Index: bfd/elf.c
===================================================================
RCS file: /cvs/src/src/bfd/elf.c,v
retrieving revision 1.260
diff -u -p -r1.260 elf.c
--- bfd/elf.c 7 Jan 2005 09:52:00 -0000 1.260
+++ bfd/elf.c 25 Jan 2005 10:07:51 -0000
@@ -5977,10 +5977,10 @@ _bfd_elf_canonicalize_dynamic_symtab (bf
return symcount;
}
-/* Return the size required for the dynamic reloc entries. Any
- section that was actually installed in the BFD, and has type
- SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
- considered to be a dynamic reloc section. */
+/* Return the size required for the dynamic reloc entries. Any loadable
+ section that was actually installed in the BFD, and has type SHT_REL
+ or SHT_RELA, and uses the dynamic symbol table, is considered to be a
+ dynamic reloc section. */
long
_bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
@@ -5996,7 +5996,8 @@ _bfd_elf_get_dynamic_reloc_upper_bound (
ret = sizeof (arelent *);
for (s = abfd->sections; s != NULL; s = s->next)
- if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
+ if ((s->flags & SEC_LOAD) != 0
+ && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
&& (elf_section_data (s)->this_hdr.sh_type == SHT_REL
|| elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
@@ -6005,14 +6006,13 @@ _bfd_elf_get_dynamic_reloc_upper_bound (
return ret;
}
-/* Canonicalize the dynamic relocation entries. Note that we return
- the dynamic relocations as a single block, although they are
- actually associated with particular sections; the interface, which
- was designed for SunOS style shared libraries, expects that there
- is only one set of dynamic relocs. Any section that was actually
- installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
- the dynamic symbol table, is considered to be a dynamic reloc
- section. */
+/* Canonicalize the dynamic relocation entries. Note that we return the
+ dynamic relocations as a single block, although they are actually
+ associated with particular sections; the interface, which was
+ designed for SunOS style shared libraries, expects that there is only
+ one set of dynamic relocs. Any loadable section that was actually
+ installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
+ dynamic symbol table, is considered to be a dynamic reloc section. */
long
_bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
@@ -6033,7 +6033,8 @@ _bfd_elf_canonicalize_dynamic_reloc (bfd
ret = 0;
for (s = abfd->sections; s != NULL; s = s->next)
{
- if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
+ if ((s->flags & SEC_LOAD) != 0
+ && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
&& (elf_section_data (s)->this_hdr.sh_type == SHT_REL
|| elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
{
@@ -7908,7 +7909,7 @@ long
_bfd_elf_get_synthetic_symtab (bfd *abfd,
long symcount ATTRIBUTE_UNUSED,
asymbol **syms ATTRIBUTE_UNUSED,
- long dynsymcount ATTRIBUTE_UNUSED,
+ long dynsymcount,
asymbol **dynsyms,
asymbol **ret)
{
@@ -7924,10 +7925,14 @@ _bfd_elf_get_synthetic_symtab (bfd *abfd
char *names;
asection *plt;
+ *ret = NULL;
+
if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
return 0;
- *ret = NULL;
+ if (dynsymcount <= 0)
+ return 0;
+
if (!bed->plt_sym_val)
return 0;
Index: binutils/nm.c
===================================================================
RCS file: /cvs/src/src/binutils/nm.c,v
retrieving revision 1.43
diff -u -p -r1.43 nm.c
--- binutils/nm.c 14 Oct 2004 09:36:54 -0000 1.43
+++ binutils/nm.c 25 Jan 2005 10:07:56 -0000
@@ -1026,8 +1026,18 @@ display_rel_file (bfd *abfd, bfd *archiv
}
else
{
+ long storage = bfd_get_dynamic_symtab_upper_bound (abfd);
+
static_count = symcount;
static_syms = minisyms;
+
+ if (storage > 0)
+ {
+ dyn_syms = xmalloc (storage);
+ dyn_count = bfd_canonicalize_dynamic_symtab (abfd, dyn_syms);
+ if (dyn_count < 0)
+ bfd_fatal (bfd_get_filename (abfd));
+ }
}
synth_count = bfd_get_synthetic_symtab (abfd, static_count, static_syms,
dyn_count, dyn_syms, &synthsyms);
--
Alan Modra
IBM OzLabs - Linux Technology Centre
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1
2005-01-25 10:30 ` Alan Modra
@ 2005-01-26 20:33 ` Andrew Cagney
0 siblings, 0 replies; 6+ messages in thread
From: Andrew Cagney @ 2005-01-26 20:33 UTC (permalink / raw)
To: Alan Modra; +Cc: binutils
Alan Modra wrote:
> On Tue, Jan 25, 2005 at 08:23:59PM +1030, Alan Modra wrote:
>
>>On Mon, Jan 24, 2005 at 04:51:12PM -0500, Andrew Cagney wrote:
>>
>>>$ nm --synthetic ...
>>>BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol
>>>index 1
>>>10010900 ? *ABS*@plt
>>>10010918 B bar
>>
>>It's a bug. _bfd_elf_get_synthetic_symtab is trying to slurp dynamic
>>relocs before the dynamic symbol table has been read.
>>
>>"nm -D --synthetic" works. It looks like "nm --synthetic" is supposed
>>to work too. Oh well, fixing.
>
>
> As well as fixing the above, I've restricted the relocs returned by
> _bfd_elf_canonicalize_dynamic_reloc to those for loadable sections.
> The idea is to exclude debug relocs, and any other weird stuff that
> generally isn't of interest for "objdump -dR".
Works for me.
> I see gdb makes
> calls to bfd_canonicalize_dynamic_reloc too, but I think gdb/dbxread.c
> and gdb/solib-frv.c aren't interested in debug relocs either.
Agreed.
thanks!
Andrew
>
> bfd/
> * elf.c (_bfd_elf_get_dynamic_reloc_upper_bound): Only include
> loadable reloc sections.
> (_bfd_elf_canonicalize_dynamic_reloc): Likewise.
> (_bfd_elf_get_synthetic_symtab): Return 0 if no dynamic syms.
> binutils/
> * nm.c (display_rel_file): Read dynamic syms before calling
> bfd_get_synthetic_symtab.
>
> Index: bfd/elf.c
> ===================================================================
> RCS file: /cvs/src/src/bfd/elf.c,v
> retrieving revision 1.260
> diff -u -p -r1.260 elf.c
> --- bfd/elf.c 7 Jan 2005 09:52:00 -0000 1.260
> +++ bfd/elf.c 25 Jan 2005 10:07:51 -0000
> @@ -5977,10 +5977,10 @@ _bfd_elf_canonicalize_dynamic_symtab (bf
> return symcount;
> }
>
> -/* Return the size required for the dynamic reloc entries. Any
> - section that was actually installed in the BFD, and has type
> - SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
> - considered to be a dynamic reloc section. */
> +/* Return the size required for the dynamic reloc entries. Any loadable
> + section that was actually installed in the BFD, and has type SHT_REL
> + or SHT_RELA, and uses the dynamic symbol table, is considered to be a
> + dynamic reloc section. */
>
> long
> _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
> @@ -5996,7 +5996,8 @@ _bfd_elf_get_dynamic_reloc_upper_bound (
>
> ret = sizeof (arelent *);
> for (s = abfd->sections; s != NULL; s = s->next)
> - if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
> + if ((s->flags & SEC_LOAD) != 0
> + && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
> && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
> || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
> ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
> @@ -6005,14 +6006,13 @@ _bfd_elf_get_dynamic_reloc_upper_bound (
> return ret;
> }
>
> -/* Canonicalize the dynamic relocation entries. Note that we return
> - the dynamic relocations as a single block, although they are
> - actually associated with particular sections; the interface, which
> - was designed for SunOS style shared libraries, expects that there
> - is only one set of dynamic relocs. Any section that was actually
> - installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
> - the dynamic symbol table, is considered to be a dynamic reloc
> - section. */
> +/* Canonicalize the dynamic relocation entries. Note that we return the
> + dynamic relocations as a single block, although they are actually
> + associated with particular sections; the interface, which was
> + designed for SunOS style shared libraries, expects that there is only
> + one set of dynamic relocs. Any loadable section that was actually
> + installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
> + dynamic symbol table, is considered to be a dynamic reloc section. */
>
> long
> _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
> @@ -6033,7 +6033,8 @@ _bfd_elf_canonicalize_dynamic_reloc (bfd
> ret = 0;
> for (s = abfd->sections; s != NULL; s = s->next)
> {
> - if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
> + if ((s->flags & SEC_LOAD) != 0
> + && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
> && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
> || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
> {
> @@ -7908,7 +7909,7 @@ long
> _bfd_elf_get_synthetic_symtab (bfd *abfd,
> long symcount ATTRIBUTE_UNUSED,
> asymbol **syms ATTRIBUTE_UNUSED,
> - long dynsymcount ATTRIBUTE_UNUSED,
> + long dynsymcount,
> asymbol **dynsyms,
> asymbol **ret)
> {
> @@ -7924,10 +7925,14 @@ _bfd_elf_get_synthetic_symtab (bfd *abfd
> char *names;
> asection *plt;
>
> + *ret = NULL;
> +
> if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
> return 0;
>
> - *ret = NULL;
> + if (dynsymcount <= 0)
> + return 0;
> +
> if (!bed->plt_sym_val)
> return 0;
>
> Index: binutils/nm.c
> ===================================================================
> RCS file: /cvs/src/src/binutils/nm.c,v
> retrieving revision 1.43
> diff -u -p -r1.43 nm.c
> --- binutils/nm.c 14 Oct 2004 09:36:54 -0000 1.43
> +++ binutils/nm.c 25 Jan 2005 10:07:56 -0000
> @@ -1026,8 +1026,18 @@ display_rel_file (bfd *abfd, bfd *archiv
> }
> else
> {
> + long storage = bfd_get_dynamic_symtab_upper_bound (abfd);
> +
> static_count = symcount;
> static_syms = minisyms;
> +
> + if (storage > 0)
> + {
> + dyn_syms = xmalloc (storage);
> + dyn_count = bfd_canonicalize_dynamic_symtab (abfd, dyn_syms);
> + if (dyn_count < 0)
> + bfd_fatal (bfd_get_filename (abfd));
> + }
> }
> synth_count = bfd_get_synthetic_symtab (abfd, static_count, static_syms,
> dyn_count, dyn_syms, &synthsyms);
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-01-26 20:33 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-24 21:51 BFD: /home/cagney/tmp/a.out(.rela.plt): relocation 0 has invalid symbol index 1 Andrew Cagney
2005-01-24 21:53 ` Ian Lance Taylor
2005-01-24 22:24 ` Andrew Cagney
2005-01-25 9:54 ` Alan Modra
2005-01-25 10:30 ` Alan Modra
2005-01-26 20:33 ` Andrew Cagney
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