1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
37 *
| 1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
37 *
|
38 * $Id: SYS.h,v 1.3 1996/01/22 00:00:51 julian Exp $
| 38 * $Id: SYS.h,v 1.4 1996/05/05 07:56:03 peter Exp $
|
39 */
40
41#include <sys/syscall.h>
42#include "DEFS.h"
43
44#ifdef PIC
45#define PIC_PROLOGUE \
46 pushl %ebx; \
47 call 1f; \
481: \
49 popl %ebx; \
50 addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
51#define PIC_EPILOGUE \
52 popl %ebx
53#define PIC_PLT(x) x@PLT
54#define PIC_GOT(x) x@GOT(%ebx)
55#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
56#else
57#define PIC_PROLOGUE
58#define PIC_EPILOGUE
59#define PIC_PLT(x) x
60#define PIC_GOT(x) x
61#define PIC_GOTOFF(x) x
62#endif
63
64#define SYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(x); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
65#define RSYSCALL(x) SYSCALL(x); ret
66
| 39 */
40
41#include <sys/syscall.h>
42#include "DEFS.h"
43
44#ifdef PIC
45#define PIC_PROLOGUE \
46 pushl %ebx; \
47 call 1f; \
481: \
49 popl %ebx; \
50 addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
51#define PIC_EPILOGUE \
52 popl %ebx
53#define PIC_PLT(x) x@PLT
54#define PIC_GOT(x) x@GOT(%ebx)
55#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
56#else
57#define PIC_PROLOGUE
58#define PIC_EPILOGUE
59#define PIC_PLT(x) x
60#define PIC_GOT(x) x
61#define PIC_GOTOFF(x) x
62#endif
63
64#define SYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(x); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
65#define RSYSCALL(x) SYSCALL(x); ret
66
|
| 67#define PSEUDO(x,y) ENTRY(x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
68#define CALL(x,y) call CNAME(y); addl $4*x,%esp
69/* gas fucks up offset -- although we don't currently need it, do for BCS */
70#define LCALL(x,y) .byte 0x9a ; .long y; .word x
71
|
67/*
| 72/*
|
| 73 * Design note:
74 *
75 * The macros PSYSCALL() and PRSYSCALL() are intended for use where a
76 * syscall needs to be renamed in the threaded library. When building
77 * a normal library, they default to the traditional SYSCALL() and
78 * RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
79 * that the renamed function needs to be called.
80 */
81#ifdef _THREAD_SAFE /* in case */
82/*
|
68 * For the thread_safe versions, we prepend _thread_sys_ to the function
69 * name so that the 'C' wrapper can go around the real name.
70 */
| 83 * For the thread_safe versions, we prepend _thread_sys_ to the function
84 * name so that the 'C' wrapper can go around the real name.
85 */
|
71#ifdef _THREAD_SAFE /* in case */
72#define PSYSCALL(x,y) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(y); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
73#define PRSYSCALL(x,y) PSYSCALL(x,y); ret
| 86#define PSYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(_thread_sys_/**/x); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
87#define PRSYSCALL(x) PSYSCALL(x); ret
88#define PPSEUDO(x,y) ENTRY(_thread_sys_/**/x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
89#else
90/*
91 * The non-threaded library defaults to traditional syscalls where
92 * the function name matches the syscall name.
93 */
94#define PSYSCALL(x) SYSCALL(x)
95#define PRSYSCALL(x) RSYSCALL(x)
96#define PPSEUDO(x,y) PSEUDO(x,y)
|
74#endif
75
| 97#endif
98
|
76#define PSEUDO(x,y) ENTRY(x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
77#define CALL(x,y) call CNAME(y); addl $4*x,%esp
78/* gas fucks up offset -- although we don't currently need it, do for BCS */
79#define LCALL(x,y) .byte 0x9a ; .long y; .word x
80
| |
81#ifdef __ELF__
82#define KERNCALL int $0x80 /* Faster */
83#else
84#define KERNCALL LCALL(7,0) /* The old way */
85#endif
86
87#define ASMSTR .asciz
| 99#ifdef __ELF__
100#define KERNCALL int $0x80 /* Faster */
101#else
102#define KERNCALL LCALL(7,0) /* The old way */
103#endif
104
105#define ASMSTR .asciz
|