Is there anything special I need to do for assembly on amd64?
I am having trouble with the following code:
.data
msg:
.ascii "Hello\n"
len = . - msg
.text
.global _start
_syscall:
int $0x80
ret
_start:
xor %rax, %rax
cdq
push $len
push $msg
push $1
movb $4,%al
call _syscall
push $0
movb $1,%al
call _syscall
Here is how I am attempting to assemble the above:
as -o test1.o test1.s
ld -e _start -o test1 test1.o
I tried elf2olf -o openbsd test1, but I receive this error:
elf2olf: test1: Exec format error.
Is there something that I am missing that I need to do on amd64?
Thanks,
Brian
Note: NASM is not an option since it's not available on amd64; there isn't a
port of YASM available yet. And I ran into problems trying to compile
the YASM's source.
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