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and subject line Bug#215913: gcc: arm: preprocessor spuriously adds line breaks
when processing assembler code
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Date: Wed, 15 Oct 2003 14:38:23 +0200
From: Gerrit Pape <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: gcc: arm: preprocessor spuriously adds line breaks when processing
assembler code
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--u3/rZRmxL6MmkK24
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Package: gcc
Severity: important
Hi,
(sid)[EMAIL PROTECTED]:~/dietlibc-0.23/arm$ gcc -v
Reading specs from /usr/lib/gcc-lib/arm-linux/3.3.2/specs
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f77,pascal,objc,treelang --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-clocale=gnu --enable-debug --enable-java-gc=boehm
--enable-java-awt=xlib --enable-objc-gc arm-linux
Thread model: posix
gcc version 3.3.2 20031005 (Debian prerelease)
The dietlibc_0.23-1 fails to build on arm because of bad preprocessing
of assembler code. Here's the relevant part of the build log
http://buildd.debian.org/fetch.php?&pkg=dietlibc&ver=0.23-1&arch=arm&stamp=1063449359&file=log&as=raw
gcc -I. -Iinclude -pipe -nostdinc -Os -fomit-frame-pointer -fstrict-aliasing
-mhard-float -Wall -W -Wchar-subscripts -Wmissing-prototypes
-Wmissing-declarations -Wno-switch -Wredundant-decls -Wno-unused -c arm/clone.S
-o bin-arm/clone.o
arm/clone.S: Assembler messages:
arm/clone.S:20: Error: bad instruction `syscall'
arm/clone.S:25: Error: bad instruction `syscall'
make[1]: *** [bin-arm/clone.o] Error 1
make[1]: Leaving directory `/build/buildd/dietlibc-0.23'
make: *** [build-stamp] Error 2
I attach the clone.S source file, and also the output 'gcc -E clone.S'.
The preprocessor adds linebreaks at the word 'syscall', even though it's
just a comment, see line 18 and line 24 in clone.S.
If there's something wrong with the arm/clone.S source file, please tell
me; in my opinion the preprocessor is at fault here.
Thanks, Gerrit.
--u3/rZRmxL6MmkK24
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="clone.S"
#include <errno.h>
#include "syscalls.h"
.text
.weak clone
.global __clone
@
@ Some slightly tricky stuff here... edit with care :-)
@
clone:
__clone:
movs r12, r0 @ check function pointer
cmpne r1, #0 @ if function check for stack pointer
moveq r0, #-EINVAL @ if one is not available set errno
value
beq __unified_syscall @ handle as if error was returned by
the syscall
stmdb r1!, { r3, r12 } @ store function param (r3) and
function ptr (r12)
@ into what will become the childs
stack.
mov r0, r2 @ move flags argument to r0
swi __NR_clone @ call the syscall
movs r0, r0 @ set condition codes
blt __unified_syscall @ (return code < 0): handle as an error
movne pc, lr @ (return code > 0): return to parent
mov fp, #0 @ clear the frame pointer
adr lr, 1f @ setup return address
ldmia sp!, { r0, pc } @ load function param and jump to
thread function
1: b _exit @ branch to _exit (PIC safe)
--u3/rZRmxL6MmkK24
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="clone.S.preprocessed"
# 1 "clone.S"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "clone.S"
# 1 "/usr/include/errno.h" 1 3 4
# 29 "/usr/include/errno.h" 3 4
# 1 "/usr/include/features.h" 1 3 4
# 318 "/usr/include/features.h" 3 4
# 1 "/usr/include/gnu/stubs.h" 1 3 4
# 319 "/usr/include/features.h" 2 3 4
# 30 "/usr/include/errno.h" 2 3 4
__BEGIN_DECLS
# 1 "/usr/include/bits/errno.h" 1 3 4
# 25 "/usr/include/bits/errno.h" 3 4
# 1 "/usr/include/linux/errno.h" 1 3 4
# 1 "/usr/include/asm/errno.h" 1 3 4
# 5 "/usr/include/linux/errno.h" 2 3 4
# 26 "/usr/include/bits/errno.h" 2 3 4
# 37 "/usr/include/errno.h" 2 3 4
# 47 "/usr/include/errno.h" 3 4
extern int errno;
# 59 "/usr/include/errno.h" 3 4
__END_DECLS
# 3 "clone.S" 2
# 1 "syscalls.h" 1
# 474 "syscalls.h"
.macro __syscall_weak name wsym sym typ
.text
.type \wsym,function
.weak \wsym
\wsym:
.type \sym,function
.global \sym
\sym:
.ifgt \typ
mov ip, sp
stmfd sp!,{r4, r5, r6}
ldmia ip, {r4, r5, r6}
.endif
swi \name
.ifgt \typ
b __unified_syscall4
.else
b __unified_syscall
.endif
.endm
.macro __syscall name sym typ
.text
.type \sym,function
.global \sym
\sym:
.ifgt \typ
mov ip, sp
stmfd sp!,{r4, r5, r6}
ldmia ip, {r4, r5, r6}
.endif
swi \name
.ifgt \typ
b __unified_syscall4
.else
b __unified_syscall
.endif
.endm
# 4 "clone.S" 2
.text
.weak clone
.global __clone
@
@ Some slightly tricky stuff here... edit with care :-)
@
clone:
__clone:
movs r12, r0 @ check function pointer
cmpne r1, #0 @ if function check for stack pointer
moveq r0, #-22 @ if one is not available set errno value
beq __unified_syscall @ handle as if error was returned by the
syscall
# 20 "clone.S"
stmdb r1!, { r3, r12 } @ store function param (r3) and function ptr
(r12)
@ into what will become the childs
stack.
mov r0, r2 @ move flags argument to r0
swi (0x900000 +120) @ call the
syscall
# 25 "clone.S"
movs r0, r0 @ set condition codes
blt __unified_syscall @ (return code < 0): handle as an error
movne pc, lr @ (return code > 0): return to parent
mov fp, #0 @ clear the frame pointer
adr lr, 1f @ setup return address
ldmia sp!, { r0, pc } @ load function param and jump to thread function
1: b _exit @ branch to _exit (PIC safe)
--u3/rZRmxL6MmkK24--
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Received: (qmail 10480 invoked by uid 501); 23 Oct 2003 19:19:30 -0000
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Date: Thu, 23 Oct 2003 21:19:30 +0200
From: Gerrit Pape <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Bug#215913: gcc: arm: preprocessor spuriously adds line breaks
when processing assembler code
References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
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On Wed, Oct 15, 2003 at 03:12:50PM +0200, Falk Hueffner wrote:
> Gerrit Pape <[EMAIL PROTECTED]> writes:
> > The preprocessor adds linebreaks at the word 'syscall', even though
> > it's just a comment, see line 18 and line 24 in clone.S.
>
> This looks very similar to bug 210482, which should have been fixed.
Yes. After asking for a rebuild on the debian-arm list didn't work out,
I uploaded a new package. It auto-built fine now with gcc-3.3_1:3.3.2-1.
Thanks, Gerrit.
