about summary refs log tree commit diff
path: root/src/internal/superh/syscall.s
diff options
context:
space:
mode:
authorBobby Bingham <koorogi@koorogi.info>2013-10-05 05:13:18 -0500
committerBobby Bingham <koorogi@koorogi.info>2014-02-23 16:15:54 -0600
commit3a3c813e08d808224c12fd0e9104aeff7c45c9a7 (patch)
tree508b28c42438615d711afcb9b44d7b0e0842f28d /src/internal/superh/syscall.s
parentd05aaedaabd4f5472c233dbbd1ff4bb9c9c99794 (diff)
downloadmusl-3a3c813e08d808224c12fd0e9104aeff7c45c9a7.tar.gz
musl-3a3c813e08d808224c12fd0e9104aeff7c45c9a7.tar.xz
musl-3a3c813e08d808224c12fd0e9104aeff7c45c9a7.zip
superh port
Diffstat (limited to 'src/internal/superh/syscall.s')
-rw-r--r--src/internal/superh/syscall.s22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/internal/superh/syscall.s b/src/internal/superh/syscall.s
new file mode 100644
index 00000000..a8fda1c0
--- /dev/null
+++ b/src/internal/superh/syscall.s
@@ -0,0 +1,22 @@
+.global __syscall
+.type   __syscall, @function
+__syscall:
+	! The kernel syscall entry point documents that the trap number indicates
+	! the number of arguments being passed, but it then ignores that information.
+	! Since we do not actually know how many arguments are being passed, we will
+	! say there are six, since that is the maximum we support here.
+	mov r4, r3
+	mov r5, r4
+	mov r6, r5
+	mov r7, r6
+	mov.l @r15, r7
+	mov.l @(4,r15), r0
+	mov.l @(8,r15), r1
+	trapa #22
+	or r0, r0
+	or r0, r0
+	or r0, r0
+	or r0, r0
+	or r0, r0
+	rts
+	 nop