2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
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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
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24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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36 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
38 * $FreeBSD: src/lib/libc/i386/SYS.h,v 1.17.2.2 2002/10/15 19:46:46 fjoe Exp $
39 * $DragonFly: src/lib/libcr/i386/Attic/SYS.h,v 1.3 2004/04/25 12:40:48 joerg Exp $
42 #include <sys/syscall.h>
45 #define SYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); \
46 ENTRY(__CONCAT(_,x)); \
48 .set CNAME(x),CNAME(__CONCAT(_,x)); \
49 lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
51 #define RSYSCALL(x) SYSCALL(x); ret
53 #define PSEUDO(x,y) ENTRY(__CONCAT(_,x)); \
55 .set CNAME(x),CNAME(__CONCAT(_,x)); \
56 lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
58 /* gas messes up offset -- although we don't currently need it, do for BCS */
59 #define LCALL(x,y) .byte 0x9a ; .long y; .word x
64 * The macros PSYSCALL() and PRSYSCALL() are intended for use where a
65 * syscall needs to be renamed in the threaded library. When building
66 * a normal library, they default to the traditional SYSCALL() and
67 * RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
68 * that the renamed function needs to be called.
72 * For the thread_safe versions, we prepend __sys_ to the function
73 * name so that the 'C' wrapper can go around the real name.
75 #define PSYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); \
76 ENTRY(__CONCAT(__sys_,x)); \
77 lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
78 #define PRSYSCALL(x) PSYSCALL(x); ret
79 #define PPSEUDO(x,y) ENTRY(__CONCAT(__sys_,x)); \
80 lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
83 * The non-threaded library defaults to traditional syscalls where
84 * the function name matches the syscall name.
86 #define PSYSCALL(x) SYSCALL(x)
87 #define PRSYSCALL(x) RSYSCALL(x)
88 #define PPSEUDO(x,y) PSEUDO(x,y)
91 #define KERNCALL int $0x80 /* Faster */