58 lines
1.6 KiB
Text
58 lines
1.6 KiB
Text
$NetBSD: patch-ag,v 1.2 1998/12/28 22:22:00 bad Exp $
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--- /dev/null Sun Dec 27 17:07:36 1998
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+++ machdep/syscall-template-alpha-netbsd-1.3.S Sun Dec 27 17:21:40 1998
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@@ -0,0 +1,53 @@
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+#include <machine/asm.h>
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+#define COMPAT_43
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+#include <sys/syscall.h>
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+#define CHMK() call_pal 0x83
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+
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+#ifdef SYS___sigsuspend14
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+#define SYS_sigsuspend SYS___sigsuspend14
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+#endif
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+#ifdef SYS___sigprocmask14
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+#define SYS_sigprocmask SYS___sigprocmask14
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+#endif
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+
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+#undef SYSCALL
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+
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+/* Kernel syscall interface:
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+ Input:
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+ v0 - system call number
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+ a* - arguments, as in C
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+ Output:
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+ a3 - zero iff successful
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+ v0 - errno value on failure, else result
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+
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+ This macro is similar to SYSCALL in asm.h, but not completely.
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+ There's room for optimization, if we assume this will continue to
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+ be assembled as one file.
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+
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+ This macro expansions does not include the return instruction.
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+ If there's no other work to be done, use something like:
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+ SYSCALL(foo) ; ret
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+ If there is other work to do (in fork, maybe?), do it after the
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+ SYSCALL invocation. */
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+
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+#define SYSCALL(x) \
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+ .align 4 ;\
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+ .globl machdep_sys_##x ;\
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+ .ent machdep_sys_##x, 0 ;\
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+machdep_sys_##x: ;\
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+ .frame sp,0,ra ;\
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+ ldiq v0, SYS_##x ;\
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+ CHMK() ;\
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+ beq a3, Lsys_noerr_##x ;\
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+ br gp, Lsys_err_##x ;\
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+Lsys_err_##x: ;\
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+ /* Load gp so we can find cerror to jump to. */;\
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+ ldgp gp, 0(gp) ;\
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+ jmp zero, machdep_cerror ;\
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+Lsys_noerr_##x:
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+
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+#define SIMPLE_SYSCALL(x) SYSCALL(x) ; ret ; .end machdep_sys_##x
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+
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+#define XSYSCALL(x) SIMPLE_SYSCALL(x)
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+
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+XSYSCALL(SYSCALL_NAME)
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