fusl/src/thread/sh/clone.s - Issue 1574103002: Remove cruft from fusl

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Side by Side Diff: fusl/src/thread/sh/clone.s

Issue 1574103002: Remove cruft from fusl (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 4 years, 11 months ago

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1 .text

2 .global __clone

3 .type __clone, @function

4 __clone:

5 ! incoming: fn stack flags arg ptid tls ctid

6 ! r4 r5 r6 r7 @r15 @(4,r15) @(8,r15)

7

8 mov #-16, r0

9 and r0, r5

10

11 mov r4, r1 ! r1 = fn

12 mov r7, r2 ! r2 = arg

13

14 mov #120, r3 ! r3 = __NR_clone

15 mov r6, r4 ! r4 = flags

16 !mov r5, r5 ! r5 = stack

17 mov.l @r15, r6 ! r6 = ptid

18 mov.l @(8,r15), r7 ! r7 = ctid

19 mov.l @(4,r15), r0 ! r0 = tls

20 trapa #31

21

22 or r0, r0

23 or r0, r0

24 or r0, r0

25 or r0, r0

26 or r0, r0

27

28 cmp/eq #0, r0

29 bt 1f

30

31 ! we are the parent, return

32 rts

33 nop

34

35 1: ! we are the child, call fn(arg)

36 mov.l 1f, r0

37 mov r1, r5

38 bsrf r0

39 mov r2, r4

40

41 2: mov #1, r3 ! __NR_exit

42 mov r0, r4

43 trapa #31

44

45 or r0, r0

46 or r0, r0

47 or r0, r0

48 or r0, r0

49 or r0, r0

50

51 .align 2

52 .hidden __shcall

53 1: .long __shcall@PCREL+(.-2b)

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