I have an elf file with a section that has an allocated length, but no content
in the file. In binutils 2.16.91.0.5 I used to be able to give it some contents
(of whatever is the default value) by changing the flags, but in 2.17.50.0.17 I
can no longer do so.
My target is SH, but I have no reason to think this is SH specific.
How to reproduce:
1. Create an example binary:
FILE: test.c
int main()
{
}
END-FILE
FILE: link.ld
SECTIONS
{
.text :
{
*(.text .stub .text.* .gnu.linkonce.t.*)
} =0
.post_text_reserve :
{
/* Reserve some space so we can drop something in here later */
. += 0x160;
}
}
END-FILE
$ gcc test.c -T link.ld -nostdlib
This should create a binary with the following properties:
$ objdump -ph a.out
a.out: file format elf32-shl
Program Header:
LOAD off 0x00000080 vaddr 0x00000000 paddr 0x00000000 align 2**7
filesz 0x0000000c memsz 0x0000016c flags rwx
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 0000000c 00000000 00000000 00000080 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .post_text_reserve 00000160 0000000c 0000000c 0000008c 2**0
ALLOC
2 .comment 00000043 00000000 00000000 0000008c 2**0
CONTENTS, READONLY
2. Run objcopy:
$ objcopy a.out a2.out --set-section-flags
.post_text_reserve=contents,alloc,load,readonly,code
BFD: a2.out: section `.text' can't be allocated in segment 0
....../bin/sh4objcopy: a2.out: Bad value
BFD: a2.out: section `.text' can't be allocated in segment 0
....../bin/sh4objcopy: a2.out: Bad value
--
Summary: objcopy won't change section flags on zero file-size
sections
Product: binutils
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: andrew dot stubbs at st dot com
CC: bug-binutils at gnu dot org
http://sourceware.org/bugzilla/show_bug.cgi?id=5233
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