test.asm

format ELF64
public main
extrn printf
extrn pthread_create
extrn pthread_exit

use64


section '.text' executable

main:
push    rbx

xor     rbx, rbx

mov     rdi, pthread
xor     rsi, rsi
mov     rdx, thread_entry
xor     rcx, rcx
call    pthread_create

jmp     old_thread
thread_entry:
mov     rbx, 1

old_thread:

xor     rsi, rsi

full_loop:
cmp     [other_shared], 0
jne     quit_loop

xbegin  abort_vector

mov     [shared], 42
call qword bar

xend

add     rsi, 1

jmp     full_loop
quit_loop:

jmp     done

abort_vector:

mov     rdi, stuff
call    printf

mov     [other_shared], 1

done:

test    rbx, rbx
jz      do_exit

xor     rdi, rdi
call    pthread_exit

do_exit:

pop     rbx
xor     rax, rax
ret


bar:
ret


section '.rodata'

stuff db 'Times looped: %i', 10, 0


section '.data'

shared dq 0

pthread: times 64 db 0

other_shared db 0