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This is a fix for PR ld/16744 which showed that an object file linked with -r and -z [no]execstack 

would not honour the [no]execstack.  Fully linked binaries use a special segment to indicate the
state of the stack, but relocatable object files only have sections, and .note.GNU-stack was not
being created.

	* emultempl/elf32.em (_after_open): Create a .note.GNU-stack
	section when performing a relocatable link with -z [no]execstack
	specified.
This commit is contained in:
Nick Clifton 2014-03-31 13:14:44 +01:00
parent 72c56015dd
commit 76f0cad6f4
2 changed files with 21 additions and 1 deletions
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7
ld/ChangeLog
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@ -1,3 +1,10 @@
2014-03-31 Nick Clifton <nickc@redhat.com>
PR ld/16744
* emultempl/elf32.em (_after_open): Create a .note.GNU-stack
section when performing a relocatable link with -z [no]execstack
specified.
2014-03-27 H.J. Lu <hongjiu.lu@intel.com>
PR ld/16756

15
ld/emultempl/elf32.em
View File

@ -1112,7 +1112,20 @@ gld${EMULATION_NAME}_after_open (void)
}
if (link_info.relocatable)
return;
{
if (link_info.execstack == ! link_info.noexecstack)
/* PR ld/16744: If "-z [no]execstack" has been specified on the
command line and we are perfoming a relocatable link then no
PT_GNU_STACK segment will be created and so the
linkinfo.[no]execstack values set in _handle_option() will have no
effect. Instead we create a .note.GNU-stack section in much the
same way as the assembler does with its --[no]execstack option. */
(void) bfd_make_section_with_flags (link_info.input_bfds,
".note.GNU-stack",
SEC_READONLY | (link_info.execstack ? SEC_CODE : 0));
return;
}
if (link_info.eh_frame_hdr
&& !link_info.traditional_format)