I using nasm to generate object code from assembly source. 3 application required to compile executable:
– nasm
– gcc from gcc-
– ld from binutils package
*package names in ubuntu distribution
To install this packages run following command:
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sudo apt-get install nasm binutils gcc-4.7-base |
Files contents:
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global func section .text func: push rbp mov rbp, rsp mov rax, 1 ; sys_write mov rdi, 1 ; stdout mov rsi, message ; message address mov rdx, length ; message string length syscall pop rbp ret section .data message: db 'Hello, world!',0x0A ; message and newline length: equ $-message ; NASM definition pseudo-instruction |
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void func(); //may be extern void func(); is more true way int main(){ func(); return 0; } |
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nasm -f elf64 func.asm gcc -c use_asm.c gcc use_asm.o func.o -o use_asm |
And finaly:
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$ ./use_asm Hello, world! |
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