$ cat main.c
int main() {
return 0;
}
$ gcc -v -save-temps -S -masm=intel main.c -Wa,al
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.1.1/configure --prefix=/usr --enable-shared
--enable-languages=c,c++,objc --enable-threads=posix --enable-__cxa_atexit
--disable-multilib --libdir=/usr/lib --enable-clocale=gnu
Thread model: posix
gcc version 4.1.1
/usr/libexec/gcc/i686-pc-linux-gnu/4.1.1/cc1 -E -quiet -v main.c -masm=intel
-mtune=pentiumpro -fpch-preprocess -o main.i
ignoring nonexistent directory
"/usr/lib/gcc/i686-pc-linux-gnu/4.1.1/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc/i686-pc-linux-gnu/4.1.1/include
/usr/include
End of search list.
/usr/libexec/gcc/i686-pc-linux-gnu/4.1.1/cc1 -fpreprocessed main.i -quiet
-dumpbase main.c -masm=intel -mtune=pentiumpro -auxbase main -version -o main.s
GNU C version 4.1.1 (i686-pc-linux-gnu)
compiled by GNU C version 4.1.1.
GGC heuristics: --param ggc-min-expand=63 --param ggc-min-heapsize=62408
Compiler executable checksum: 22edf66e2a6729efc57467b56c8043ae
$ cat main.s
.file "main.c"
.intel_syntax
.text
.globl main
.type main, @function
main:
lea %ecx, [%esp+4]
and %esp, -16
push DWORD PTR [%ecx-4]
push %ebp
mov %ebp, %esp
push %ecx
mov %eax, 0
pop %ecx
pop %ebp
lea %esp, [%ecx-4]
ret
.size main, .-main
.ident "GCC: (GNU) 4.1.1"
.section .note.GNU-stack,"",@progbits
These register names are plain not-intel like.
I was able to reproduce it on:
GCC: (GNU) 4.0.3 (Ubuntu 4.0.3-1ubuntu5)
If I'm not wrong somewhere - this is a bug. Hope it'll be easy to fix or is
even fixed in experimental versions - I have no way to test that.
--
Summary: -masm=intel - does not emit right asm code
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dawid dot ciezarkiewicz at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29493
