this assembly example works in linux, netbsd - but not in openbsd, why?

# as why.asm -o why.o
# ld why.o -e start -static -o why

.global start

.equ SYS_EXIT, 0x01
.equ SYS_WRITE, 0x04
.equ STD_OUT, 0x01

# this example works in linux (with changed syscalls)
# also in netbsd, but not in openbsd. why?

.macro sys
syscall
.endm

.text

start:
# print first message
leaq msg1 (%rip), %rsi
call print

# print second message
leaq msg2 (%rip), %rsi
call print

# print first message, but
# this time from the array
movq array (%rip), %rsi
call print

exit:
movl $SYS_EXIT, %eax
subl %edi, %edi
sys

# prints 9-char string
# in %rsi address of string
print:
push %rax
push %rcx
push %rdx
push %rdi
push %r11
movl $9, %edx # string length
movl $STD_OUT, %edi
movl $SYS_WRITE, %eax
sys
pop %r11
pop %rdi
pop %rdx
pop %rcx
pop %rax
ret

.data

msg1: .ascii "string 1\n"
msg2: .ascii "string 2\n"

array: .quad msg1, msg2

.section ".note.openbsd.ident", "a"

.align 2
.long 8, 4, 1
.asciz "OpenBSD"
.long 0
.align 2