操作系统SunOS 4.1.3版本的源码
源代码在线查看： sys.h
/* @(#)SYS.h 1.1 92/07/30 SMI; from UCB 4.1 83/05/10 */ #include #if vax #ifdef PROF #define ENTRY(x) .globl _/**/x; .align 2; _/**/x: .word 0; \ .data; 1:; .long 0; .text; moval 1b,r0; jsb mcount #else #define ENTRY(x) .globl _/**/x; .align 2; _/**/x: .word 0 #endif PROF #define SYSCALL(x) err: jmp cerror; ENTRY(x); chmk $SYS_/**/x; jcs err #define BSDSYSCALL(x) err: jmp cerror; ENTRY(_/**/x); chmk $SYS_/**/x; jcs err #define PSEUDO(x,y) ENTRY(x); chmk $SYS_/**/y #define CALL(x,y) calls $x, _/**/y #define RET ret .globl cerror #endif #if sun .globl cerror #ifdef PROF .globl mcount #define ENTRY(x) .globl _/**/x;\ _/**/x: link a6,#0;\ lea x/**/1,a0;\ .data; x/**/1: .long 0; .text;\ jsr mcount;\ unlk a6 #else #define ENTRY(x) .globl _/**/x; _/**/x: #endif #define PARAM sp@(4) #define PARAM2 sp@(8) #define PSEUDO(x,y) ENTRY(x); pea SYS_/**/y; trap #0 #define SYSCALL(x) err: jmp cerror; ENTRY(x); pea SYS_/**/x; trap #0; jcs err #define BSDSYSCALL(x) err: jmp cerror; ENTRY(_/**/x); pea SYS_/**/x; trap #0; jcs err #define RET rts #endif
