Annotation of src/lib/libc/arch/sparc64/SYS.h, Revision 1.14
1.14 ! martin 1: /* $NetBSD: SYS.h,v 1.13 2003/08/07 16:42:26 agc Exp $ */
1.8 thorpej 2:
1.1 eeh 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.
1.13 agc 19: * 3. Neither the name of the University nor the names of its contributors
1.1 eeh 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: */
39:
40: #include <machine/asm.h>
41: #include <sys/syscall.h>
42: #include <machine/trap.h>
43:
1.12 wiz 44: #ifdef __STDC__
1.1 eeh 45: #define _CAT(x,y) x##y
1.12 wiz 46: #else
47: #define _CAT(x,y) x/**/y
48: #endif
1.1 eeh 49:
50: /*
51: * ERROR branches to cerror. This is done with a macro so that I can
52: * change it to be position independent later, if need be.
53: */
54: #ifdef PIC
1.9 eeh 55: #ifdef BIGPIC
56: #define JUMP(name) \
57: PIC_PROLOGUE(%g1,%g5); \
58: sethi %hi(_C_LABEL(name)),%g5; \
59: or %g5,%lo(_C_LABEL(name)),%g5; \
60: ldx [%g1+%g5],%g5; \
61: jmp %g5; \
1.5 chs 62: nop
1.1 eeh 63: #else
1.9 eeh 64: #define JUMP(name) \
65: PIC_PROLOGUE(%g1,%g5); \
66: ldx [%g1+_C_LABEL(name)],%g5; jmp %g5; nop
1.1 eeh 67: #endif
1.9 eeh 68: #else
69: #define JUMP(name) set _C_LABEL(name),%g1; jmp %g1; nop
70: #endif
71: #define ERROR() JUMP(__cerror)
1.1 eeh 72: /*
73: * SYSCALL is used when further action must be taken before returning.
74: * Note that it adds a `nop' over what we could do, if we only knew what
75: * came at label 1....
76: */
1.3 kleink 77: #define _SYSCALL(x,y) \
78: ENTRY(x); mov _CAT(SYS_,y),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
79:
1.1 eeh 80: #define SYSCALL(x) \
1.3 kleink 81: _SYSCALL(x,x)
1.1 eeh 82:
83: /*
84: * RSYSCALL is used when the system call should just return. Here
1.14 ! martin 85: * we use the SYSCALL_G5RFLAG to put the `success' return address in %g5
1.1 eeh 86: * and avoid a branch.
87: */
88: #define RSYSCALL(x) \
1.14 ! martin 89: ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \
1.1 eeh 90: t ST_SYSCALL; ERROR()
91:
92: /*
93: * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
94: */
95: #define PSEUDO(x,y) \
1.14 ! martin 96: ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \
1.1 eeh 97: t ST_SYSCALL; ERROR()
1.7 thorpej 98:
99: /*
100: * WSYSCALL(weak,strong) is like RSYSCALL(weak), except that weak is
101: * a weak internal alias for the strong symbol.
102: */
103: #define WSYSCALL(weak,strong) \
104: WEAK_ALIAS(weak,strong); \
105: PSEUDO(strong,weak)
1.1 eeh 106:
107: /*
108: * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls
109: * that never fail.
110: *
111: * XXX - This should be optimized.
112: */
113: #define SYSCALL_NOERROR(x) \
114: ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL
115:
116: /*
117: * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls
118: * that never fail.
119: *
120: * XXX - This should be optimized.
121: */
122: #define RSYSCALL_NOERROR(x) \
1.14 ! martin 123: ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \
1.1 eeh 124: t ST_SYSCALL
125:
126: /*
127: * PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y) except that the name is x.
128: */
129: #define PSEUDO_NOERROR(x,y) \
1.14 ! martin 130: ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \
1.1 eeh 131: t ST_SYSCALL
1.8 thorpej 132:
1.2 kleink 133: .globl _C_LABEL(__cerror)
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