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-rw-r--r--src/thread/mipsn32/clone.s30
1 files changed, 30 insertions, 0 deletions
diff --git a/src/thread/mipsn32/clone.s b/src/thread/mipsn32/clone.s
new file mode 100644
index 00000000..51035852
--- /dev/null
+++ b/src/thread/mipsn32/clone.s
@@ -0,0 +1,30 @@
+.set noreorder
+.global __clone
+.type __clone,@function
+__clone:
+ # Save function pointer and argument pointer on new thread stack
+ and $5, $5, -16 # aligning stack to double word
+ subu $5, $5, 16
+ sw $4, 0($5) # save function pointer
+ sw $7, 4($5) # save argument pointer
+
+ # Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid)
+ # sys_clone(u64 flags, u64 ustack_base, u64 parent_tidptr, u64 child_tidptr, u64 tls)
+ move $4, $6
+ move $6, $8
+ move $7, $9
+ move $8, $10
+ li $2, 6055
+ syscall
+ beq $7, $0, 1f
+ nop
+ jr $ra
+ subu $2, $0, $2
+1: beq $2, $0, 1f
+ nop
+ jr $ra
+ nop
+1: lw $25, 0($sp) # function pointer
+ lw $4, 4($sp) # argument pointer
+ jr $25 # call the user's function
+ nop