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authorRich Felker <dalias@aerifal.cx>2014-02-27 22:03:25 -0500
committerRich Felker <dalias@aerifal.cx>2014-02-27 22:03:25 -0500
commitaacd348637e38795dd7ae3c7c8c908d8c0cd24fd (patch)
tree3055797eea08dafe99dcdbd1e7efabd44bcb723b /src/thread/sh/clone.s
parentb9f7f2e8762922a1a24d41358164ebe9ae437e31 (diff)
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rename superh port to "sh" for consistency
linux, gcc, etc. all use "sh" as the name for the superh arch. there
was already some inconsistency internally in musl: the dynamic linker
was searching for "ld-musl-sh.path" as its path file despite its own
name being "ld-musl-superh.so.1". there was some sentiment in both
directions as to how to resolve the inconsistency, but overall "sh"
was favored.
Diffstat (limited to 'src/thread/sh/clone.s')
-rw-r--r--src/thread/sh/clone.s47
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