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-rw-r--r--src/thread/superh/syscall_cp.s39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/thread/superh/syscall_cp.s b/src/thread/superh/syscall_cp.s
new file mode 100644
index 00000000..5677b9c0
--- /dev/null
+++ b/src/thread/superh/syscall_cp.s
@@ -0,0 +1,39 @@
+.text
+.global __syscall_cp_asm
+.type __syscall_cp_asm, @function
+__syscall_cp_asm:
+
+.global __cp_begin
+__cp_begin:
+ mov.l @r4, r4
+ tst r4, r4
+ bt 2f
+
+ mov.l L1, r0
+ braf r0
+ nop
+1:
+
+.align 2
+L1: .long __cancel@PLT-(1b-.)
+
+2: mov r5, r3
+ mov r6, r4
+ mov r7, r5
+ mov.l @r15, r6
+ mov.l @(4,r15), r7
+ mov.l @(8,r15), r0
+ mov.l @(12,r15), r1
+ trapa #22
+
+.global __cp_end
+__cp_end:
+ ! work around hardware bug
+ or r0, r0
+ or r0, r0
+ or r0, r0
+ or r0, r0
+ or r0, r0
+
+ rts
+ nop