Annotation of sys/lib/libkern/arch/sparc64/SYS.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: SYS.h,v 1.3 2003/06/02 23:28:09 millert Exp $ */
2: /* $NetBSD: SYS.h,v 1.2 1999/02/15 04:54:36 hubertf Exp $ */
3: /*-
4: * Copyright (c) 1992, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This software was developed by the Computer Systems Engineering group
8: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9: * contributed to Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)SYS.h 8.1 (Berkeley) 6/4/93
36: *
37: * from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
38: * $Id: SYS.h,v 1.3 2003/06/02 23:28:09 millert Exp $
39: */
40:
41: #include <machine/asm.h>
42: #include <sys/syscall.h>
43: #include <machine/trap.h>
44:
45: #ifdef __STDC__
46: #define _CAT(x,y) x##y
47: #else
48: #define _CAT(x,y) x/**/y
49: #endif
50:
51: /*
52: * ERROR branches to cerror. This is done with a macro so that I can
53: * change it to be position independent later, if need be.
54: */
55: #ifdef PIC
56: #define ERROR() \
57: PIC_PROLOGUE(%g1,%g2); \
58: ld [%g1+cerror],%g2; jmp %g2; nop
59: #else
60: #define ERROR() \
61: sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
62: #endif
63:
64: /*
65: * SYSCALL is used when further action must be taken before returning.
66: * Note that it adds a `nop' over what we could do, if we only knew what
67: * came at label 1....
68: */
69: #define SYSCALL(x) \
70: ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
71:
72: /*
73: * RSYSCALL is used when the system call should just return. Here
74: * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
75: * and avoid a branch.
76: */
77: #define RSYSCALL(x) \
78: ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
79: t ST_SYSCALL; ERROR()
80:
81: /*
82: * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
83: */
84: #define PSEUDO(x,y) \
85: ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
86: t ST_SYSCALL; ERROR()
87:
88: /*
89: * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls
90: * that never fail.
91: *
92: * XXX - This should be optimized.
93: */
94: #define SYSCALL_NOERROR(x) \
95: ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL
96:
97: /*
98: * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls
99: * that never fail.
100: *
101: * XXX - This should be optimized.
102: */
103: #define RSYSCALL_NOERROR(x) \
104: ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
105: t ST_SYSCALL
106:
107: .globl cerror
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