Date: Sun, 23 Nov 1997 00:44:38 +1100 (EST) From: Andrew Cagney <cagney@tpgi.com.au> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: gnu/5126: <Synopsis of the problem (one line)> Message-ID: <199711221344.AAA25765@b1.tpgi.com.au> Resent-Message-ID: <199711221350.FAA06333@hub.freebsd.org>
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>Number: 5126
>Category: gnu
>Synopsis: <Synopsis of the problem (one line)>
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Nov 22 05:50:02 PST 1997
>Last-Modified:
>Originator: Andrew Cagney
>Organization:
>Release: FreeBSD 2.2.5-RELEASE i386
>Environment:
`Virgin 2.2.5' (I've reverted back to 2.1.7 :-)
>Description:
For the program below, when compiled with G++ (-gpic) , produces the
incorrect assembler:
.type _d__Fv,@function
_d__Fv:
pushl %ebp
movl %esp,%ebp
pushl %ebx
call L5
L5:
popl %ebx
addl $_GLOBAL_OFFSET_TABLE_+[.-L5],%ebx
movl _DefaultHash__Fv@GOT(%ebx),%edx
movl %edx,%eax
jmp L3
.align 2,0x90
jmp L4
.align 2,0x90
jmp L3
.align 2,0x90
L4:
L3:
movl -4(%ebp),%ebx
leave
ret
Notice that it has generated a ``@GOT'' instead of ``@GOTOFF'' for the
reference to the static function DefaultHash (which has been both
declared and defined).
If the declaration is removed, the correct code is generated. If GCC
is used, the correct code is generated.
>How-To-Repeat:
$ cat test.cc
static void DefaultHash(void);
static void DefaultHash(void) { }
void *
d (void)
{
return DefaultHash;
}
$ gcc -c -fpic test.cc
/tmp/cc005218.s: Assembler messages:
/tmp/cc005218.s:45: Warning: GOT relocation burb: `_DefaultHash__Fv' should be global
$ cp test.cc test.c
$ gcc -c -fpic test.c
$ tail +2 test.cc > t.cc
$ cat t.cc
static void DefaultHash(void) { }
void *
d (void)
{
return DefaultHash;
}
$ gcc -c -fpic t.cc
>Fix:
Re-arrange code so that the static declaration isn't needed.
>Audit-Trail:
>Unformatted:
help
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