谁能给出一个复杂一点的代码并且在其他编译器上试一下？
// a.c
int main(void)
{
for(volatile int i=0xff; i; i--);
return 0;
}
命令:
arm-elf-gcc -std=gnu99 -g -c -o a.o a.c
arm-elf-objdump -S a.o >a.lst
a.lst 的内容：
a.o: file format elf32-littlearm
Disassembly of section .text:
00000000 <main>:
int main(void)
{
0: e1a0c00d mov ip, sp
4: e92dd800 stmdb sp!, {fp, ip, lr, pc}
8: e24cb004 sub fp, ip, #4 ; 0x4
c: e24dd004 sub sp, sp, #4 ; 0x4
for(volatile int i=0xff; i; i--)
10: e3a030ff mov r3, #255 ; 0xff
14: e50b3010 str r3, [fp, #-16]
18: ea000002 b 28 <main+0x28>
1c: e51b3010 ldr r3, [fp, #-16]
20: e2433001 sub r3, r3, #1 ; 0x1
24: e50b3010 str r3, [fp, #-16]
28: e51b3010 ldr r3, [fp, #-16]
2c: e3530000 cmp r3, #0 ; 0x0
30: 1afffff9 bne 1c <main+0x1c>
;
return 0;
34: e3a03000 mov r3, #0 ; 0x0
}
38: e1a00003 mov r0, r3
3c: e89da808 ldmia sp, {r3, fp, sp, pc}
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