how is this made??

gistfile1.txt

```c
int abs(int x) {
    if (x >= 0) {
        return x;
    } else {
        return -x;
    }
}
int main(void) {
    return abs(-3);
}
```

=>

```
$ make dump
rm -f test.o crt0.o
gcc -march=i386 -m32 -nostdlib -fno-pie -fno-asynchronous-unwind-tables -fno-stack-protector -c test.c
nasm -f elf crt0.asm
ld -m elf_i386 -s --entry=start --oformat=binary -Ttext 0x7c00 -o main crt0.o test.o
objdump -M intel -m i386 -b binary -D main

main:     file format binary


Disassembly of section .data:

00000000 <.data>:
   0:	e8 1a 00 00 00       	call   0x1f
   5:	e9 f6 83 ff ff       	jmp    0xffff8400
   a:	55                   	push   ebp
   b:	89 e5                	mov    ebp,esp
   d:	83 7d 08 00          	cmp    DWORD PTR [ebp+0x8],0x0
  11:	78 05                	js     0x18
  13:	8b 45 08             	mov    eax,DWORD PTR [ebp+0x8]
  16:	eb 05                	jmp    0x1d
  18:	8b 45 08             	mov    eax,DWORD PTR [ebp+0x8]
  1b:	f7 d8                	neg    eax
  1d:	5d                   	pop    ebp
  1e:	c3                   	ret
  1f:	55                   	push   ebp
  20:	89 e5                	mov    ebp,esp
  22:	b8 03 00 00 00       	mov    eax,0x3
  27:	5d                   	pop    ebp
  28:	c3                   	ret
```