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[Bug inline-asm/55744] Use of ebx as output register in inline asm on x86_64 PIC mcmodel=medium
- From: "egallager at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 28 Jul 2017 14:50:34 +0000
- Subject: [Bug inline-asm/55744] Use of ebx as output register in inline asm on x86_64 PIC mcmodel=medium
- Auto-submitted: auto-generated
- References: <bug-55744-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55744
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-07-28
CC| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Results from testing on i386-apple-darwin9.8.0 with gcc8:
$ /usr/local/bin/gcc -c -fPIC -mcmodel=medium 55744.c
cc1: error: code model ‘medium’ not supported in the 32 bit mode
$ /usr/local/bin/gcc -c -fPIC -mcmodel=medium -m64 55744.c
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=medium -m64 -Wall -Wextra
55744.c
Undefined symbols:
"_GLOBAL_OFFSET_TABLE_", referenced from:
_main in ccbh4pRB.o
ld: symbol(s) not found
collect2: error: ld returned 1 exit status
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=large -m64 -Wall -Wextra
55744.c
:14:junk `@GOTOFF' after expression
:18:junk `@PLTOFF' after expression
$ /usr/local/bin/gcc -o 55744.exe -fPIC -mcmodel=small -m64 -Wall -Wextra
55744.c
$ ./55744.exe
Result: 42
$
Which is probably bug 63893 and bug 50077 in my case. Can you try again with
your own target and see if it still fails in your case?