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Bug 1652587

Summary:	Add support for the .attach_to_group pseudo-op to the assembler
Product:	Red Hat Enterprise Linux 7	Reporter:	Nick Clifton <nickc>
Component:	binutils	Assignee:	Nick Clifton <nickc>
Status:	CLOSED ERRATA	QA Contact:	Miloš Prchlík <mprchlik>
Severity:	low	Docs Contact:	Vladimír Slávik <vslavik>
Priority:	unspecified
Version:	7.7	CC:	dcantrell, fweimer, law, mcermak, mprchlik, ohudlick, riehecky, vslavik
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:	binutils-2.27-37.base.el7	Doc Type:	Enhancement
Doc Text:	Feature: Adds the .attach-to-group pseudo-op to the assembler. Reason: This pseudo-op is used by the annobin plugin to gcc when it needs to join several different sections to the same section group. Result: The annobin plugin can now be used with the RHEL-7 gcc.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-06 12:41:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1643040

Description Nick Clifton 2018-11-22 12:38:39 UTC

Description of problem:

  The annobin plugin for gcc uses a new assembler pseudo-op to attach a
  section to a group.  Support for this pseudo-op is available in the
  assembler shipped with the RHEL-8 binutils, but not currently in the
  assembler shipped with RHEL-7.

Version-Release number of selected component (if applicable):

  2.27-37

How reproducible:

  100%

Steps to Reproduce:
1. Assemble this file:
---------------------------------------------
	.pushsection .gnu.build.attributes..text.destructor_func, "G", %note, .text.destructor_func.group
	.balign 4
	.dc.l 12
	.dc.l 16
	.dc.l 0x101
	.dc.b 0x47, 0x41, 0x2a, 0x6, 0x12, 0, 0, 0, 0x11, 0, 0xc, 0 
	.quad .annobin_destructor_func.start
	.quad .annobin_destructor_func.end
	.popsection

	.section	.text.destructor_func,"ax",@progbits
	.type	destructor_func, @function
destructor_func:
.LFB11:
	.cfi_startproc
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	movl	$0, disabled(%rip)
	nop
	popq	%rbp
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE11:
	.size	destructor_func, .-destructor_func

	.pushsection .text.destructor_func
	.attach_to_group .text.destructor_func.group
	.popsection
-------------------------------------

Actual results:

  % as attach.s
  attach.s: Assembler messages:
  attach.s:31: Error: unknown pseudo-op: `.attach_to_group'


Expected results:

  % as attach.s
  %

Additional info:

The file binutils-attach-to-group.patch in the RHEL-8 binutils srpm contains
the patch for RHEL-8.  All that should be necessary is to backport this patch
to RHEL-7.

Comment 5 Nick Clifton 2019-01-08 15:47:37 UTC

Fixed in version binutils-2.27-37.base.el7.

Comment 10 Miloš Prchlík 2019-06-20 08:09:22 UTC

Verified with binutils-2.27-41.base.el7.

Comment 12 errata-xmlrpc 2019-08-06 12:41:33 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:2075