34 lines
745 B
C
34 lines
745 B
C
#if defined(__linux__)
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#define SYS_WRITE 1
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#define SYS_EXIT 60
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#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
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#define SYS_WRITE 4
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#define SYS_EXIT 1
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#elif defined(__APPLE__)
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#define SYS_WRITE 0x2000004
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#define SYS_EXIT 0x2000001
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#endif
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char msg[] = "こんにちは、世界！\n";
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void _start() {
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asm volatile(
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".intel_syntax noprefix\n"
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"mov eax, %[sys_write]\n"
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"mov edi, 1\n"
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"mov rsi, offset msg\n"
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"mov edx, %[len]\n"
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"syscall\n"
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"mov eax, %[sys_exit]\n"
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"xor edi, edi\n"
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"syscall\n"
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".att_syntax prefix\n"
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:: [sys_write] "i" (SYS_WRITE),
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[sys_exit] "i" (SYS_EXIT),
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[len] "i" (sizeof(msg) - 1)
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: "rax", "rdi", "rsi", "rdx", "rcx", "r11"
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);
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}
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