1.set noreorder
2.global __clone
3.hidden __clone
4.type __clone,@function
5__clone:
6 # Save function pointer and argument pointer on new thread stack
7 and $5, $5, -16 # aligning stack to double word
8 dsubu $5, $5, 16
9 sd $4, 0($5) # save function pointer
10 sd $7, 8($5) # save argument pointer
11
12 # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid)
13 # sys_clone(u64 flags, u64 ustack_base, u64 parent_tidptr, u64 child_tidptr, u64 tls)
14 move $4, $6
15 move $6, $8
16 move $7, $9
17 move $8, $10
18 li $2, 5055
19 syscall
20 beq $7, $0, 1f
21 nop
22 jr $ra
23 dsubu $2, $0, $2
241: beq $2, $0, 1f
25 nop
26 jr $ra
27 nop
281: move $fp, $0
29 ld $25, 0($sp) # function pointer
30 ld $4, 8($sp) # argument pointer
31 jalr $25 # call the user's function
32 nop
33 move $4, $2
34 li $2, 5058
35 syscall