[Bug binutils/2537] linker does not allow application to use value between SHT_LOUSER and SHT_HIUSER
--- Additional Comments From hjl at lucon dot org 2006-04-21 13:54 --- Fixed by http://sourceware.org/ml/binutils/2006-04/msg00283.html -- What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED http://sourceware.org/bugzilla/show_bug.cgi?id=2537 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug binutils/2593] New: Cannot set the CONTENTS or LOAD flags
Given the simplest program:
int main()
{
}
and a simple linker script (not a real world example):
SECTIONS
{
.text :
{
*(.text .stub .text.* .gnu.linkonce.t.*)
} =0
.post_text_reserve :
{
/* Reserve some space so we can drop something in here later */
. += 0x160;
}
}
compiled with:
sh-elf-gcc test.c -T link2.ld -nostdlib
I get a file with the following properties:
sh-elf-objdump -h a.out
a.out: file format elf32-shl
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 000c 0080 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .post_text_reserve 0160 000c 000c 008c 2**0
ALLOC
2 .comment 0043 008c 2**0
CONTENTS, READONLY
sh-elf-readelf -S a.out
There are 7 section headers, starting at offset 0x10c:
Section Headers:
[Nr] Name TypeAddr OffSize ES Flg Lk Inf
Al
[ 0] NULL 00 00 000 0 0
[ 1] .text PROGBITS 80 0c 00 AX 0 0
2
[ 2] .post_text_reserv NOBITS 000c 8c 000160 00 WA 0 0
1
[ 3] .comment PROGBITS 8c 43 000 0 1
[ 4] .shstrtab STRTAB cf 3d 000 0 1
[ 5] .symtab SYMTAB 000224 b0 106 8 4
[ 6] .strtab STRTAB 0002d4 1c 000 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
All is good so far.
Now I want to add the missing flags to the .post_test_reserve (the next step
would be to actually add some data).
So I do the following:
sh-elf-objcopy --set-section-flags
.post_text_reserve=contents,alloc,load,readonly,code a.out a2.out
Now I get:
sh-elf-objdump -h a2.out
a2.out: file format elf32-shl
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 000c 0080 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .post_text_reserve 0160 000c 000c 008c 2**0
ALLOC, READONLY, CODE
2 .comment 0043 01ec 2**0
CONTENTS, READONLY
sh-elf-readelf -S a2.out
There are 7 section headers, starting at offset 0x26c:
Section Headers:
[Nr] Name TypeAddr OffSize ES Flg Lk Inf
Al
[ 0] NULL 00 00 000 0 0
[ 1] .text PROGBITS 80 0c 00 AX 0 0
2
[ 2] .post_text_reserv NOBITS 000c 8c 000160 00 AX 0 0
1
[ 3] .comment PROGBITS 0001ec 43 000 0 1
[ 4] .shstrtab STRTAB 00022f 3d 000 0 1
[ 5] .symtab SYMTAB 000384 b0 106 8 4
[ 6] .strtab STRTAB 000434 1c 000 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
The READONLY and CODE flags have been added, but the CONTENTS and LOAD flags
remain absent. Also, the ELF section type remains NOBITS, where it ought to be
PROGBITS.
After some examination of the source code and the ELF format I find that the
CONTENTS and LOAD flags are in fact implicit in the PROGBITS section type, so
all the above problems come down to the same issue.
AFAICT, the section type is set in elf_fake_sections(), but only if there is no
existing type (sh_type != SHT_NULL). In this case the section already has a type
- presumably loaded from the input file - and therefore does not have its type
set. Thus the change to the CONTENTS and LOAD flags is ignored.
The documentation says:
`--set-section-flags SECTION=FLAGS'
Set the flags for the named section. The FLAGS argument is a
comma separated string of flag names. The recognized names are
`alloc', `contents', `load', `noload', `readonly', `code', `data',
`rom', `share', and `debug'. You can set the `contents' flag for
a section which does not have contents, but it is not meaningful
to clear the `contents' flag of a section which does have
contents-just remove the section instead. Not all flags are
meaningful for all object file formats.
What I want to do - set the contents flag - is explicitly described.
This used to work in 2.15.94.0.1 from kernel.org, but it
[Bug binutils/2584] SIGSEGV in strings tool when the file is crafted.
-- What|Removed |Added CC||jolmos at isecauditors dot ||com http://sourceware.org/bugzilla/show_bug.cgi?id=2584 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug binutils/2593] Cannot set the CONTENTS or LOAD flags
--- Additional Comments From andrew dot stubbs at st dot com 2006-04-21
16:05 ---
Subject: Re: New: Cannot set the CONTENTS or LOAD flags
[moving the conversation to bugzilla ...]
Thanks H.J., but this does not seem to work for me. I cannot see any
difference.
> On Fri, Apr 21, 2006 at 01:58:08PM +0100, Andrew STUBBS wrote:
>> > Hi all,
>> >
>> > I have encountered an error setting the CONTENTS and LOAD flags with
>> > relatively recent versions of objcopy/bfd.
>> >
>
> Could you please open a bug report with a simple testcase? This patch
> should work.
>
> Thanks.
>
>
> H.J.
>
> 2006-04-21 H.J. Lu <[EMAIL PROTECTED]>
>
> * elf.c (_bfd_elf_new_section_hook): Don't set section ELF type
> and flags if its BFD flags has been set.
>
> --- bfd/elf.c.copy2006-04-21 07:00:02.0 -0700
> +++ bfd/elf.c 2006-04-21 07:32:26.0 -0700
> @@ -2487,10 +2487,11 @@ _bfd_elf_new_section_hook (bfd *abfd, as
>bed = get_elf_backend_data (abfd);
>sec->use_rela_p = bed->default_use_rela_p;
>
> - /* When we read a file, we don't need section type and flags unless
> - it is a linker created section. They will be overridden in
> - _bfd_elf_make_section_from_shdr anyway. */
> - if (abfd->direction != read_direction
> + /* When we read a file or section BFD flags has been set, we don't
> + need section type and flags unless it is a linker created section.
> + They will be overridden in _bfd_elf_make_section_from_shdr
> + anyway. */
> + if ((!sec->flags && abfd->direction != read_direction)
>|| (sec->flags & SEC_LINKER_CREATED) != 0)
> {
>ssect = (*bed->get_sec_type_attr) (abfd, sec);
>
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2593
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[Bug binutils/2593] Cannot set the CONTENTS or LOAD flags
--- Additional Comments From hjl at lucon dot org 2006-04-21 16:22 --- Please provide a testcase I can reproduce with Linux/x86 or Linux/x86-64. -- What|Removed |Added CC||hjl at lucon dot org http://sourceware.org/bugzilla/show_bug.cgi?id=2593 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug binutils/2593] Cannot set the CONTENTS or LOAD flags
--- Additional Comments From andrew dot stubbs at st dot com 2006-04-21 16:49 --- Created an attachment (id=977) --> (http://sourceware.org/bugzilla/attachment.cgi?id=977&action=view) Input testcase for objcopy This is the binary file produced by the method in the original report. Additionally, I have modified the magic number so that it *looks* like an 80386 binary even though it is really an SH binary. (This was easier than building a whole x86 toolchain just to produce an elf file.) This allows the x86 objcopy to reproduce the problem. -- http://sourceware.org/bugzilla/show_bug.cgi?id=2593 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug binutils/2593] Cannot set the CONTENTS or LOAD flags
--- Additional Comments From hjl at lucon dot org 2006-04-21 23:22 --- A new patch is posted at http://sourceware.org/ml/binutils/2006-04/msg00309.html -- http://sourceware.org/bugzilla/show_bug.cgi?id=2593 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug ld/2596] New: Wrong code: linker relaxation for AVR
The linker does not adjust the addresses included in initialized function tables (.data or .rodata) when these are subject to changes due to relaxation. A patch has been committed by me on the mailing list. If possible this patch should be applied prior to the final "17" release. I am submitting this bug report as kind of reminder so that one could get it into the 2.17 release. Bjoern. -- Summary: Wrong code: linker relaxation for AVR Product: binutils Version: 2.17 Status: NEW Severity: critical Priority: P2 Component: ld AssignedTo: unassigned at sources dot redhat dot com ReportedBy: bjoern dot m dot haase at web dot de CC: bug-binutils at gnu dot org GCC build triplet: all GCC host triplet: all GCC target triplet: avr-elf http://sourceware.org/bugzilla/show_bug.cgi?id=2596 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
