diff options
Diffstat (limited to 'src/thread/sh/clone.s')
| -rw-r--r-- | src/thread/sh/clone.s | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/thread/sh/clone.s b/src/thread/sh/clone.s new file mode 100644 index 00000000..d6c9184d --- /dev/null +++ b/src/thread/sh/clone.s @@ -0,0 +1,47 @@ +.text +.global __clone +.type __clone, @function +__clone: +! incoming: fn stack flags arg ptid tls ctid +! r4 r5 r6 r7 @r15 @(4,r15) @(8,r15) + + mov #-16, r0 + and r0, r5 + + mov r4, r1 ! r1 = fn + mov r7, r2 ! r2 = arg + + mov #120, r3 ! r3 = __NR_clone + mov r6, r4 ! r4 = flags + !mov r5, r5 ! r5 = stack + mov.l @r15, r6 ! r6 = ptid + mov.l @(8,r15), r7 ! r7 = ctid + mov.l @(4,r15), r0 ! r0 = tls + trapa #21 + + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 + + cmp/eq #0, r0 + bt 1f + + ! we are the parent, return + rts + nop + +1: ! we are the child, call fn(arg) + jsr @r1 + mov r2, r4 + + mov #1, r3 ! __NR_exit + mov r0, r4 + trapa #17 + + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 |