[Bug gas/213] New: Fake labels in .o when file is assembled with --gstabs

[danglin at gcc dot gnu dot org]

Assembling the following file:

# 1 "lib2funcs.asm"
# 1 "/mnt/gnu/gcc-3.3/objdir/gcc//"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "lib2funcs.asm"
; Subroutines for calling unbound dynamic functions from within GDB for HPPA.
; Subroutines for out of line prologues and epilogues on for the HPPA
; Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.

; This file is part of GCC.

; GCC is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2, or (at your option)
; any later version.

; GCC is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.

; In addition to the permissions in the GNU General Public License, the
; Free Software Foundation gives you unlimited permission to link the
; compiled version of this file into combinations with other programs,
; and to distribute those combinations without any restriction coming
; from the use of this file. (The General Public License restrictions
; do apply in other respects; for example, they cover modification of
; the file, and distribution when not linked into a combine
; executable.)

; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING. If not, write to
; the Free Software Foundation, 59 Temple Place - Suite 330,
; Boston, MA 02111-1307, USA.


 .SPACE $PRIVATE$
 .SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31
 .SUBSPA $BSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=82
 .SPACE $TEXT$
 .SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44
 .SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY
 .SUBSPA $MILLICODE$,QUAD=0,ALIGN=8,ACCESS=44,SORT=8

 .IMPORT $$dyncall,MILLICODE

 .SPACE $TEXT$
 .SUBSPA $CODE$




; Simply call with the address of the desired import stub in %r22 and
; arguments in the normal place (%r26-%r23 and stack slots).
;
 .align 4
 .EXPORT __gcc_plt_call,ENTRY,PRIV_LEV=3,RTNVAL=GR
__gcc_plt_call
 .PROC
 .CALLINFO
 .ENTRY
 ; Our return address comes in %r31, not %r2!
 stw %r31,-8(%r30)

 ; An inline version of dyncall so we don't have to worry
 ; about long calls to millicode, PIC and other complexities.
 bb,>=,n %r22,30,L$foo
        depi 0,31,2,%r22
        ldw 4(%r22),%r19
        ldw 0(%r22),%r22
L$foo
        ldsid (%r22),%r1
        mtsp %r1,%sr0
        ble 0(%sr0,%r22)
 copy %r31,%r2
 ldw -8(%r30),%r2

 ; We're going to be returning to a stack address, so we
 ; need to do an intra-space return.
 ldsid (%rp),%r1
 mtsp %r1,%sr0
 be,n 0(%sr0,%rp)
 .EXIT
 .PROCEND

with

/opt/gnu/bin/as --gstabs -o xxx.o xxx.s

results in

# objdump -d xxx.o                       

xxx.o:     file format som

Disassembly of section $CODE$:

00000000 <__gcc_plt_call>:
   0:   0f df 12 91     stw r31,-8(,sp)

00000004 <L0L1>:
   4:   c7 d6 c0 12     bb,>=,n r22,1e,14 <L0L5>

00000008 <L0L2>:
   8:   d6 c0 1c 1e     depwi 0,31,2,r22

0000000c <L0L3>:
   c:   0e c8 10 93     ldw 4(,r22),r19

00000010 <L0L4>:
  10:   0e c0 10 96     ldw 0(,r22),r22

00000014 <L0L5>:
  14:   02 c0 10 a1     ldsid (,r22),r1

00000018 <L0L6>:
  18:   00 01 18 20     mtsp r1,sr0

0000001c <L0L7>:
  1c:   e6 c0 00 00     be,l 0(sr0,r22),%sr0,%r31

00000020 <L0L8>:
  20:   08 1f 02 42     copy r31,rp

00000024 <L0L9>:
  24:   0f d1 10 82     ldw -8(,sp),rp

00000028 <L0L10>:
  28:   00 40 10 a1     ldsid (,rp),r1

0000002c <L0L11>:
  2c:   00 01 18 20     mtsp r1,sr0

00000030 <L0L12>:
  30:   e0 40 00 02     be,n 0(sr0,rp)
  34:   00 00 00 00     break 0,0

The symbols actually look like this

Symbols from xxx.o:

  Value    Info   Type  Scope ck HQIRCDSKLN xl reloc Name

00000014 00000000 Data  Local  0 ..........  3 00000 L0^AL5
00000024 00000000 Data  Local  0 ..........  3 00000 L0^AL9
00000020 00000000 Data  Local  0 ..........  3 00000 L0^AL8
0000001c 00000000 Data  Local  0 ..........  3 00000 L0^AL7
00000018 00000000 Data  Local  0 ..........  3 00000 L0^AL6
0000002c 00000000 Data  Local  0 ..........  3 00000 L0^AL11
00000010 00000000 Data  Local  0 ..........  3 00000 L0^AL4
0000000c 00000000 Data  Local  0 ..........  3 00000 L0^AL3
00000008 00000000 Data  Local  0 ..........  3 00000 L0^AL2
00000004 00000000 Data  Local  0 ..........  3 00000 L0^AL1
00000000 00000000 Data  Local  0 ..........  3 00000 L0^AL0
00000000 00000000 Data  Local  0 ..........  3 00000 L0^AF1
00000030 00000000 Data  Local  0 ..........  3 00000 L0^AL12
00000028 00000000 Data  Local  0 ..........  3 00000 L0^AL10
00000000 00000000 Data  Local  0 ..........  3 00000 L0^AF0
00000003 00000000 Entry Univ   0 ..........  3 00001 __gcc_plt_call
00000000 00000000 Data  Local  0 ..........  3 00000 $CODE$

These appear to be fake labels that don't get removed.  The
test file doesn't contain any stabs directives.

This is the assembler version:

# /opt/gnu/bin/as --version
GNU assembler 2.15.91 20040520
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `hppa2.0w-hp-hpux11.11'.

-- 
           Summary: Fake labels in .o when file is assembled with --gstabs
           Product: binutils
           Version: 2.15
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: danglin at gcc dot gnu dot org
                CC: bug-binutils at gnu dot org
 GCC build triplet: hppa2.0w-hp-hpux11.11
  GCC host triplet: hppa2.0w-hp-hpux11.11
GCC target triplet: hppa2.0w-hp-hpux11.11


http://sources.redhat.com/bugzilla/show_bug.cgi?id=213

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