$NetBSD: patch-ag,v 1.2 1998/12/28 22:22:00 bad Exp $ --- /dev/null Sun Dec 27 17:07:36 1998 +++ machdep/syscall-template-alpha-netbsd-1.3.S Sun Dec 27 17:21:40 1998 @@ -0,0 +1,53 @@ +#include +#define COMPAT_43 +#include +#define CHMK() call_pal 0x83 + +#ifdef SYS___sigsuspend14 +#define SYS_sigsuspend SYS___sigsuspend14 +#endif +#ifdef SYS___sigprocmask14 +#define SYS_sigprocmask SYS___sigprocmask14 +#endif + +#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)