1 #__clone(func, stack, flags, arg, ptid, tls, ctid)
2 #         a0,    a1,   a2,    a3,  a4,  a5,   a6
3 # sys_clone(flags, stack, ptid, ctid, tls)
4 #            a0,    a1,   a2,    a3,  a4
5 
6 .global __clone
7 .hidden __clone
8 .type __clone,@function
9 __clone:
10 	bstrins.d $a1, $zero, 3, 0   #stack to 16 align
11 	# Save function pointer and argument pointer on new thread stack
12 	addi.d  $a1, $a1, -16
13 	st.d    $a0, $a1, 0     # save function pointer
14 	st.d    $a3, $a1, 8     # save argument pointer
15 	or      $a0, $a2, $zero
16 	or      $a2, $a4, $zero
17 	or      $a3, $a6, $zero
18 	or      $a4, $a5, $zero
19 	ori     $a7, $zero, 220
20 	syscall 0               # call clone
21 
22 	beqz    $a0, 1f         # whether child process
23 	jirl    $zero, $ra, 0   # parent process return
24 1:
25 	ld.d    $t8, $sp, 0     # function pointer
26 	ld.d    $a0, $sp, 8     # argument pointer
27 	jirl    $ra, $t8, 0     # call the user's function
28 	ori     $a7, $zero, 93
29 	syscall 0               # child process exit
30