编译C文件时不支持的x86-64指令集错误

I am trying to follow the tutorials in this link.

我正在尝试按照此链接中的教程。

When I get down to the part where I start making a test.c file, I try to run the first compilation line.

当我开始编写test.c文件的部分时，我尝试运行第一个编译行。

gcc -c -g -Os -march=i686 -ffreestanding -Wall -Werror test.c -o test.o

Here is the contents of test.c

这是test.c的内容

__asm__(".code16\n");
__asm__("jmpl $0x0000, $main\n");

void main() {
}

When I call the first compilation line, it shows me this error.

当我调用第一个编译行时，它会显示此错误。

test.c:1:0: error: CPU you selected does not support x86-64 instruction set
 __asm__(".code16\n");
 ^

Can anyone tell me why this is happening? And if possible, how to fix it?

谁能告诉我为什么会这样？如果可能的话，如何修复它？

I am running Ubuntu Desktop x64, thank you in advance for your help.

我正在运行Ubuntu Desktop x64，请提前感谢您的帮助。

EDIT:

编辑：

I have changed the first compilation line to:

我已将第一个编译行更改为：

gcc -c -g -Os -m32 -ffreestanding -Wall -Werror test.c -o test.o

And it seems to work fine. However, there are two more lines that are giving me trouble.

它似乎工作正常。但是，还有两条线路给我带来了麻烦。

ld -static -Ttest.ld -nostdlib --nmagic -o test.elf test.o

and

和

objcopy -O binary test.elf test.bin

The first one throws me the error of.

第一个抛出了我的错误。

ld: i386 architecture of input file `test.o' is incompatible with i386:x86-64 output

And because of this, I have not tried the final line of compilation.

因此，我还没有尝试最后的编译行。

Here is the code for the test.ld file.

这是test.ld文件的代码。

ENTRY(main);
SECTIONS
{
    . = 0x7C00;
    .text : AT(0x7C00)
    {
        *(.text);
    }
    .sig : AT(0x7DFE)
    {
        SHORT(0xaa55);
    }
} 

Any suggestions on how to fix this?

对于如何解决这个问题，有任何的建议吗？

3 个解决方案

#1

Supply -m32 instead of -march=i686.

供应-m32而不是-march = i686。

#2

in fact add -m32 you can keep -march=i686 ...

实际上添加-m32你可以保持-march = i686 ...

gcc -c -g -Os -march=i686 -m32 -ffreestanding -Wall -Werror test.c -o test.o

works

作品

gcc -c -g -Os -march=i686 -m16 -ffreestanding -Wall -Werror test.c -o test.o

works

作品

gcc -c -g -Os -march=i686 -m64 -ffreestanding -Wall -Werror test.c -o test.o

fails with ;

失败了;

test.c:1:0: error: CPU you selected does not support x86-64 instruction set asm(".code16\n");

test.c：1：0：错误：您选择的CPU不支持x86-64指令集asm（“。code16 \ n”）;

#3

gcc -std=c99 -c -g -Os -march=i686 -m32 -ffreestanding -Wall -Werror test.c -o test.o
ld -static -T test.ld -m elf_i386 -nostdlib --nmagic -o test.elf test.o