【发布时间】：2020-06-03 08:52:42
【问题描述】：
我用汇编语言编写了一个 x86-64 代码。输出为 17。
.text
.LC0:
.string "%d\n"
printint:
pushq %rbp
movq %rsp, %rbp
subq $16, %rsp
movl %edi, -4(%rbp)
movl -4(%rbp), %eax
movl %eax, %esi
leaq .LC0(%rip), %rdi
movl $0, %eax
call printf@PLT
nop
leave
ret
.globl main
.type main, @function
main:
pushq %rbp
movq %rsp, %rbp
movq $2, %r8
movq $3, %r9
movq $5, %r10
imulq %r9, %r10
addq %r8, %r10
movq $8, %r8
movq $3, %r9
movq %r8,%rax
cqo
idivq %r9
movq %rax,%r8
subq %r10, %r8
movq %r10, %rdi
call printint
movl $0, %eax
popq %rbp
ret
当我用 GCC 编译这个时，我得到了这个错误。
out.s: Assembler messages:
out.s:5: Error: bad register name `%rbp'
out.s:6: Error: bad register name `%rsp'
out.s:7: Error: bad register name `%rsp'
out.s:8: Error: bad register name `%rbp)'
out.s:9: Error: bad register name `%rbp)'
out.s:11: Error: bad register name `%rip)'
out.s:19: Warning: .type pseudo-op used outside of .def/.endef: ignored.
out.s:19: Error: junk at end of line, first unrecognized character is `m'
out.s:21: Error: bad register name `%rbp'
out.s:22: Error: bad register name `%rsp'
out.s:23: Error: bad register name `%r8'
out.s:24: Error: bad register name `%r9'
out.s:25: Error: bad register name `%r10'
out.s:26: Error: bad register name `%r9'
out.s:27: Error: bad register name `%r8'
out.s:28: Error: bad register name `%r8'
out.s:29: Error: bad register name `%r9'
out.s:30: Error: bad register name `%r8'
out.s:31: Error: `cqo' is only supported in 64-bit mode
out.s:32: Error: bad register name `%r9'
out.s:33: Error: bad register name `%rax'
out.s:34: Error: bad register name `%r10'
out.s:35: Error: bad register name `%r10'
out.s:38: Error: bad register name `%rbp'
同样，当我在 NASM 中执行此操作时，我收到以下错误。
out.s:1: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
out.s:3: error: parser: instruction expected
out.s:5: error: parser: instruction expected
out.s:6: error: expression syntax error
out.s:7: error: parser: instruction expected
out.s:8: error: parser: instruction expected
out.s:9: error: parser: instruction expected
out.s:10: error: parser: instruction expected
out.s:11: error: parser: instruction expected
out.s:12: error: parser: instruction expected
out.s:18: error: parser: instruction expected
out.s:19: error: parser: instruction expected
out.s:21: error: label `pushq' inconsistently redefined
out.s:5: note: label `pushq' originally defined here
out.s:21: error: parser: instruction expected
out.s:22: error: expression syntax error
out.s:23: error: expression syntax error
out.s:24: error: expression syntax error
out.s:25: error: expression syntax error
out.s:26: error: parser: instruction expected
out.s:27: error: parser: instruction expected
out.s:28: error: expression syntax error
out.s:29: error: expression syntax error
out.s:30: error: expression syntax error
out.s:32: error: parser: instruction expected
out.s:33: error: expression syntax error
out.s:34: error: label `subq' inconsistently redefined
out.s:7: note: label `subq' originally defined here
out.s:34: error: parser: instruction expected
out.s:35: error: expression syntax error
out.s:37: error: label `movl' inconsistently redefined
out.s:8: note: label `movl' originally defined here
out.s:37: error: parser: instruction expected
out.s:38: error: parser: instruction expected
但是当我去https://www.onlinegdb.com/online_gcc_assembler编译它时，我得到了正确答案（17）。
我还在学习汇编语言。我搜索了一个答案，但找不到答案。你能解释一下这个原因吗？
关于我的笔记本电脑的详细信息
AMD RYZEN 5 处理器（基于 x64）
64 位 Windows 10
【问题讨论】：
-
你标记了这个 NASM，但那是 GAS AT&T 语法。 NASM 使用 Intel 语法。你用什么命令来尝试组装它？
-
你在本地使用的是哪个 GCC？运行
gcc -dumpmachine会得到什么？ -
@Michael mingw32 :|
-
@PeterCordes 我只用过 nasm out.s （out.s 是一个汇编文件）
-
@LasanNishshanka：那更糟； NASM 的默认输出格式是 16 位平面二进制。但是无论如何，除非您使用 NASM 指令将其完全重写为 Intel 语法，否则您不能使用 NASM 来组装它。当然，无论如何您都必须重写大部分指令才能将其移植到 Windows。可能从 Windows 的 C 编译器输出而不是 GNU/Linux 重新开始。 （您的代码显然是经过手动调整的 GCC 输出。）
标签： assembly gcc compilation x86-64 nasm