[Bug binutils/5233] New: objcopy won't change section flags on zero file-size sections

[andrew dot stubbs at st dot com]

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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