2.7 KiB
2.7 KiB
此れはlibcなしの「こんにちは、世界」のデモです。
This is a libc-less "hello, world" demo.
対応 | Support
| OS | CPU | 対応 | テスト済み |
|---|---|---|---|
| Linux | x86-64 | 〇 | 〇 |
| Linux | AArch64 | 〇 | 〇 |
| Linux | RISC-V | 〇 | 〇 |
| FreeBSD | x86-64 | 〇 | 〇 |
| OpenBSD | x86-64 | ✕ | 〇 |
| NetBSD | x86-64 | 〇 | ✕ |
| macOS | x86-64 | 〇 | ✕ |
| macOS | AArch64 | 〇 | ✕ |
| Windows | x86-64 | ✕ | ✕ |
| Windows | AArch64 | ✕ | ✕ |
使い方 | How to use
x86-64
$ cc -nostdlib -static -masm=intel -o main main.c
$ ls -thal main
-rwxr-xr-x 1 suwako suwako 1.5K 12月 15 15:57 main
$ file main
main: ELF 64-bit LSB executable, x86-64, version 1 (FreeBSD), statically linked, not stripped
$ objdump -M intel -d main
main: file format elf64-x86-64
Disassembly of section .text:
00000000002011f0 <_start>:
2011f0: 55 push rbp
2011f1: 48 89 e5 mov rbp, rsp
2011f4: b8 04 00 00 00 mov eax, 0x4
2011f9: bf 01 00 00 00 mov edi, 0x1
2011fe: 48 c7 c6 20 22 20 00 mov rsi, 0x202220
201205: ba 1c 00 00 00 mov edx, 0x1c
20120a: 0f 05 syscall
20120c: b8 01 00 00 00 mov eax, 0x1
201211: 31 ff xor edi, edi
201213: 0f 05 syscall
201215: 5d pop rbp
201216: c3 ret
$ ./main
こんにちは、世界！
AArch64、RISC-V
$ cc -nostdlib -static -o main main.c
$ ls -thal main
-rwxrwxr-x 1 suwako suwako 5.5K 12月 15 16:54 main
$ file main
main: ELF 64-bit LSB executable, UCB RISC-V, RVC, double-float ABI, version 1 (SYSV), statically linked, BuildID[sha1]=〇〇, not stripped
$ objdump -d main
main: file format elf64-littleriscv
Disassembly of section .text:
000000000001017c <_start>:
1017c: 00001797 auipc a5,0x1
10180: e8478793 addi a5,a5,-380 # 11000 <msg>
10184: 04000893 li a7,64
10188: 4505 li a0,1
1018a: 85be mv a1,a5
1018c: 4671 li a2,28
1018e: 00000073 ecall
10192: 05d00893 li a7,93
10196: 4501 li a0,0
10198: 00000073 ecall
1019c: 0001 nop
$ ./main
こんにちは、世界！