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$NetBSD: patch-ae,v 1.1 1998/08/23 06:22:17 garbled Exp $
--- /dev/null Sat Jul 18 04:39:35 1998
+++ machdep/syscall-template-alpha-netbsd-1.3.S Sat Jul 18 04:41:03 1998
@@ -0,0 +1,46 @@
+#include <machine/asm.h>
+#define COMPAT_43
+#include <sys/syscall.h>
+#define CHMK() call_pal 0x83
+
+#undef SYSCALL
+
+/* Kernel syscall interface:
+ Input:
+ v0 - system call number
+ a* - arguments, as in C
+ Output:
+ a3 - zero iff successful
+ v0 - errno value on failure, else result
+
+ This macro is similar to SYSCALL in asm.h, but not completely.
+ There's room for optimization, if we assume this will continue to
+ be assembled as one file.
+
+ This macro expansions does not include the return instruction.
+ If there's no other work to be done, use something like:
+ SYSCALL(foo) ; ret
+ If there is other work to do (in fork, maybe?), do it after the
+ SYSCALL invocation. */
+
+#define SYSCALL(x) \
+ .align 4 ;\
+ .globl machdep_sys_##x ;\
+ .ent machdep_sys_##x, 0 ;\
+machdep_sys_##x: ;\
+ .frame sp,0,ra ;\
+ ldiq v0, SYS_##x ;\
+ CHMK() ;\
+ beq a3, Lsys_noerr_##x ;\
+ br gp, Lsys_err_##x ;\
+Lsys_err_##x: ;\
+ /* Load gp so we can find cerror to jump to. */;\
+ ldgp gp, 0(gp) ;\
+ jmp zero, machdep_cerror ;\
+Lsys_noerr_##x:
+
+#define SIMPLE_SYSCALL(x) SYSCALL(x) ; ret ; .end machdep_sys_##x
+
+#define XSYSCALL(x) SIMPLE_SYSCALL(x)
+
+XSYSCALL(SYSCALL_NAME)
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