1 files changed, 37 insertions, 0 deletions
diff --git a/usr/klibc/arch/alpha/sysstub.ph b/usr/klibc/arch/alpha/sysstub.ph
new file mode 100644
index 0000000..08b97e8
--- /dev/null
+++ b/usr/klibc/arch/alpha/sysstub.ph
@@ -0,0 +1,37 @@
+# -*- perl -*-
+#
+# arch/alpha/sysstub.ph
+#
+# Script to generate system call stubs
+#
+
+# On Alpha, most system calls follow the standard convention, with the
+# system call number in r0 (v0), return an error value in r19 (a3) as
+# well as the return value in r0 (v0).
+#
+# A few system calls are dual-return with the second return value in
+# r20 (a4).
+
+sub make_sysstub($$$$$@) {
+    my($outputdir, $fname, $type, $sname, $stype, @args) = @_;
+
+    $stype = $stype || 'common';
+    $stype = 'common' if ( $stype eq 'dual0' );
+
+    open(OUT, '>', "${outputdir}/${fname}.S");
+    print OUT "#include <asm/unistd.h>\n";
+    print OUT "#include <machine/asm.h>\n";
+    print OUT "\n";
+    print OUT "\t.text\n";
+    print OUT "\t.type ${fname},\@function\n";
+    print OUT "\t.ent\t${fname}, 0\n"; # What is this?
+    print OUT "\t.globl ${fname}\n";
+    print OUT "${fname}:\n";
+    print OUT "\tlda\tv0, __NR_${sname}(zero)\n";
+    print OUT "\tbr __syscall_${stype}\n";
+    print OUT "\t.size\t${fname},.-${fname}\n";
+    print OUT "\t.end\t${fname}\n";
+    close(OUT);
+}
+
+1;