__asm__ (".L__X'%ebx = 1\n\t"
".L__X'%ecx = 2\n\t"
".L__X'%edx = 2\n\t"
".L__X'%eax = 3\n\t"
".L__X'%esi = 3\n\t"
".L__X'%edi = 3\n\t"
".L__X'%ebp = 3\n\t"
".L__X'%esp = 3\n\t"
".ifndef _BITS_SYSCALLS_ASM\n\t"
".set _BITS_SYSCALLS_ASM,1\n\t"
".macro bpushl name reg\n\t"
".if 1 - \\name\n\t"
".if 2 - \\name\n\t"
"pushl %ebx\n\t"
".else\n\t"
"xchgl \\reg, %ebx\n\t"
".endif\n\t"
".endif\n\t"
".endm\n\t"
".macro bpopl name reg\n\t"
".if 1 - \\name\n\t"
".if 2 - \\name\n\t"
"popl %ebx\n\t"
".else\n\t"
"xchgl \\reg, %ebx\n\t"
".endif\n\t"
".endif\n\t"
".endm\n\t"
".macro bmovl name reg\n\t"
".if 1 - \\name\n\t"
".if 2 - \\name\n\t"
"movl \\reg, %ebx\n\t"
".endif\n\t"
".endif\n\t"
".endm\n\t"
".endif\n\t");
#define LOADARGS_1 \
"bpushl .L__X'%k2, %k2\n\t" \
"bmovl .L__X'%k2, %k2\n\t"
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ \
register unsigned int resultvar; \
__asm__ __volatile__ ( \
LOADARGS_##nr \
"movl %1, %%eax\n\t" \
"int $0x80\n\t" \
RESTOREARGS_##nr \
: "=a" (resultvar) \
: "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
(int) resultvar; })
谁知道.L_ X'%ebx = 1的意思,我在AS doc中没有找到这句话的语法,这句话是用来赋值的?.L _X'%ebx 不是一个有效的符号名称,我猜这是否意味着一个特殊的变量导致当展开“bpushl .L_ X'%k2, %k2\n\t”时,我们需要展开.L _X'% k2,那么扩展的结果是什么,有人可以帮助我吗名字,谢谢!