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-rw-r--r--src/unistd/sh/pipe.s27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/unistd/sh/pipe.s b/src/unistd/sh/pipe.s
new file mode 100644
index 00000000..d865ae3a
--- /dev/null
+++ b/src/unistd/sh/pipe.s
@@ -0,0 +1,27 @@
+.global pipe
+.type   pipe, @function
+pipe:
+	mov    #42, r3
+	trapa  #17
+
+	! work around hardware bug
+	or     r0, r0
+	or     r0, r0
+	or     r0, r0
+	or     r0, r0
+	or     r0, r0
+
+	cmp/pz r0
+	bt     1f
+
+	mov.l  L1, r1
+	braf   r1
+	 mov   r0, r4
+
+1:	mov.l  r0, @(0,r4)
+	mov.l  r1, @(4,r4)
+	rts
+	 mov   #0, r0
+
+.align 2
+L1:	.long __syscall_ret@PLT-(1b-.)