GCC 顯示完整的編譯過程

源碼: f1.c

#include <stdio.h>
#include <ucontext.h>
#include <unistd.h>
#include <sys/time.h>

int main(int argc, const char *argv[])
{
    ucontext_t context;
    int count = 0;

    getcontext(&context);
    int value = 0;
    printf("Hello World! count = %d, value = %d\n", count++, value++);
    sleep(1);
    setcontext(&context);

    return 0;
}

顯示完整編譯連接過程

user_00@(none):asm> gcc --verbose f1.c -m32
Using built-in specs.
Target: x86_64-suse-linux
Configured with: ../configure --enable-threads=posix --prefix=/usr --with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.1.2 --enable-ssp --disable-libssp --disable-libgcj --with-slibdir=/lib64 --with-system-zlib --enable-shared --enable-__cxa_atexit --enable-libstdcxx-allocator=new --program-suffix= --enable-version-specific-runtime-libs --without-system-libunwind --with-cpu=generic --host=x86_64-suse-linux
Thread model: posix
gcc version 4.1.2 20070115 (prerelease) (SUSE Linux)
 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/cc1 -quiet -v f1.c -quiet -dumpbase f1.c -m32 -m32 -mtune=generic -auxbase f1 -version -o /tmp/cckOI3iI.s
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/include
 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/include
 /usr/include
End of search list.
GNU C version 4.1.2 20070115 (prerelease) (SUSE Linux) (x86_64-suse-linux)
	compiled by GNU C version 4.1.2 20070115 (prerelease) (SUSE Linux).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 3417495ce02f6bde0aa6fd5f0bddeaf6
 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/bin/as -V -Qy --32 -o /tmp/ccAJKu3f.o /tmp/cckOI3iI.s
GNU assembler version 2.16.91.0.5 (x86_64-suse-linux) using BFD version 2.16.91.0.5 20051219 (SUSE Linux)
 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/collect2 --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../lib/crt1.o /usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../lib/crti.o /usr/lib64/gcc/x86_64-suse-linux/4.1.2/32/crtbegin.o -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2/32 -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/lib/../lib -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2 -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/lib -L/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../.. /tmp/ccAJKu3f.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib64/gcc/x86_64-suse-linux/4.1.2/32/crtend.o /usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../lib/crtn.o

個人 gcc 是 x86_64  4.1.2 版本

在 x86_64 gcc 機器上寫 i386 32bit 的彙編編譯與運行:

彙編代碼 hello.s

.data
    msg : .string "Hello World!\n"
    len = . - msg
.text
.global _start

_start:
    movl $len, %edx
    movl $msg, %ecx
    movl $1,   %ebx
    movl $4,   %eax
    int $0x80

    movl $0, %ebx
    movl $1, %eax
    int $0x80

編譯與運行:

user_00@(none):asm> as -V -Qy --32 -o hello.o hello.s 
GNU assembler version 2.16.91.0.5 (x86_64-suse-linux) using BFD version 2.16.91.0.5 20051219 (SUSE Linux)
user_00@(none):asm> ld  -m elf_i386 -s -o hello hello.o
user_00@(none):asm> ./hello 
Hello World!