GNU >> Assembly (x86)

hello, world! (sysenter)

---

參考資訊：
1. syscall
2. how-to-use-sysenter-under-linux

main.s

    .global _start
    
    .data
msg: .ascii "hello, world!\n"
len = . - msg
  
    .text
_start:
    push %ebp
    mov %esp, %ebp

    mov $4, %eax
    mov $1, %ebx
    mov $msg, %ecx
    mov $len, %edx
    push $final
    push %ecx
    push %edx
    push %ebp
    mov %esp, %ebp
    sysenter

final:
    mov $1, %eax
    mov $0, %ebx
    push $final
    push %ecx
    push %edx
    push %ebp
    mov %esp, %ebp
    sysenter

NR	syscall name	eax	arg0(ebx)	arg1(ecx)	arg2(edx)
1	exit	1	int error_code
4	write	4	unsigned int fd	const char *buf	size_t count

編譯、執行

$ gcc -m32 main.s -o main -nostdlib
$ ./main
    hello, world!

P.S. 於Debian x64環境測試

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