1 /* $NetBSD: SYS.h,v 1.19 2009/12/14 01:07:41 matt Exp $ */
5 * SPDX-License-Identifier: (BSD-4-Clause AND BSD-3-Clause)
7 * Copyright (c) 1996 Jonathan Stone
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Jonathan Stone for
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
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26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 * Copyright (c) 1991, 1993
39 * The Regents of the University of California. All rights reserved.
41 * This code is derived from software contributed to Berkeley by
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. Neither the name of the University nor the names of its contributors
53 * may be used to endorse or promote products derived from this software
54 * without specific prior written permission.
56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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68 * from: @(#)SYS.h 8.1 (Berkeley) 6/4/93
71 #include <sys/syscall.h>
73 #include <machine/asm.h>
76 * If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops.
78 * i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after.
79 * ii) Do interprocedure jumps indirectly via t9, with the side-effect of
80 * preserving the callee's entry address in t9.
84 # if defined(__mips_o32) || defined(__mips_o64)
85 # define PIC_PROLOGUE(x) SETUP_GP
86 # define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9
87 # define PIC_RETURN() j ra
89 # define PIC_PROLOGUE(x) SETUP_GP64(t3, x)
90 # define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9
91 # define PIC_RETURN() RESTORE_GP64; j ra
94 # define PIC_PROLOGUE(x)
95 # define PIC_TAILCALL(l) j _C_LABEL(l)
96 # define PIC_RETURN() j ra
97 #endif /* __ABICALLS__ */
99 # define SYSTRAP(x) li v0,SYS_ ## x; syscall;
102 * Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id)
104 #define RSYSCALL_NOERROR(x) \
107 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
108 .weak _C_LABEL(__CONCAT(_,x)); \
109 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
115 * Do a normal syscall.
117 #define RSYSCALL(x) \
120 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
121 .weak _C_LABEL(__CONCAT(_,x)); \
122 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
123 PIC_PROLOGUE(__sys_ ## x); \
128 PIC_TAILCALL(__cerror); \
132 * Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint
133 * and syscall name are not the same.
135 #define PSEUDO_NOERROR(x) \
137 .weak _C_LABEL(__CONCAT(_,x)); \
138 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
145 .weak _C_LABEL(__CONCAT(_,x)); \
146 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
147 PIC_PROLOGUE(__sys_ ## x); \
152 PIC_TAILCALL(__cerror); \