Date: Wed, 18 Mar 1998 17:53:10 +0300 (MSK) From: Dmitrij Tejblum <tejblum@arc.hq.cti.ru> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: gnu/6055: as(1) sometimes incorrectly handle EGCS output Message-ID: <199803181453.RAA11391@yandex.hq.cti.ru>
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>Number: 6055
>Category: gnu
>Synopsis: as(1) sometimes incorrectly handle EGCS output
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 18 07:00:06 PST 1998
>Last-Modified:
>Originator: Dmitrij Tejblum
>Organization:
CompTek
>Release: FreeBSD 2.2.5-STABLE i386
>Environment:
FreeBSD 2.2.5-stable
EGCS 1.0.2 configured with --with-gnu-as --with-gnu-ld
>Description:
When a C++ program contains a static variable with a constructor, GCC emit
something like
.stabs "___CTOR_LIST__",22,0,0,__GLOBAL_$I$whatever
GCC 2.7.2.1 always emit it after __GLOBAL_$I$whatever was defined.
EGCS sometimes (apparently, with -O3, as I see now) emit it before
__GLOBAL_$I$whatever was defined. In this case, assembler silently convert
that stab to "usual" text symbol. As a result, ld complains about multiply
defined ___CTOR_LIST__.
>How-To-Repeat:
put something like
.stabs "___CTOR_LIST__",22,0,0,_qq
_qq:
movl %eax, %eax
to an .s file, assemble it, look at result with nm.
>Fix:
Not sure about correct fix. Here is my workaround, just FYI. (And so I have a
chance to hear that all my object are hopelessly broken :).
--- config/obj-aout.c Tue Mar 17 11:25:17 1998
+++ config/obj-aout.c Tue Mar 17 11:55:42 1998
@@ -469,7 +469,8 @@
/* JF deal with forward references first... */
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
if (symbolP->sy_forward && symbolP->sy_forward != symbolP) {
- S_SET_SEGMENT(symbolP,
+ if ((symbolP->sy_symbol.n_type & 0xf0) == 0)
+ S_SET_SEGMENT(symbolP,
S_GET_SEGMENT(symbolP->sy_forward));
S_SET_VALUE(symbolP, S_GET_VALUE(symbolP)
+ S_GET_VALUE(symbolP->sy_forward)
>Audit-Trail:
>Unformatted:
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