(ASM_SIZE_DIRECTIVE): Add ; at the end.
[kopensolaris-gnu/glibc.git] / sysdeps / i386 / sysdep.h
1 /* Assembler macros for i386.
2    Copyright (C) 1991, 92, 93, 95, 96, 98 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Library General Public License as
7    published by the Free Software Foundation; either version 2 of the
8    License, or (at your option) any later version.
9
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Library General Public License for more details.
14
15    You should have received a copy of the GNU Library General Public
16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18    Boston, MA 02111-1307, USA.  */
19
20 #include <sysdeps/generic/sysdep.h>
21
22 #ifdef  ASSEMBLER
23
24 /* Syntactic details of assembler.  */
25
26 #ifdef HAVE_ELF
27
28 /* ELF uses byte-counts for .align, most others use log2 of count of bytes.  */
29 #define ALIGNARG(log2) 1<<log2
30 /* For ELF we need the `.type' directive to make shared libs work right.  */
31 #define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
32 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
33
34 /* In ELF C symbols are asm symbols.  */
35 #undef  NO_UNDERSCORES
36 #define NO_UNDERSCORES
37
38 #else
39
40 #define ALIGNARG(log2) log2
41 #define ASM_TYPE_DIRECTIVE(name,type)   /* Nothing is specified.  */
42 #define ASM_SIZE_DIRECTIVE(name)        /* Nothing is specified.  */
43
44 #endif
45
46
47 /* Define an entry point visible from C.  */
48 #define ENTRY(name)                                                           \
49   ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
50   ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
51   .align ALIGNARG(4);                                                         \
52   STABS_FUN(name)                                                             \
53   C_LABEL(name)                                                               \
54   CALL_MCOUNT
55
56 #undef  END
57 #define END(name)                                                             \
58   ASM_SIZE_DIRECTIVE(name)                                                    \
59   STABS_FUN_END(name)
60
61 /* Emit stabs definition lines.  We use F(0,1) since for gcc this means
62    `a function returning int'.  */
63 #define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1))
64 #define STABS_FUN2(name, namestr)                                            \
65   .stabs #namestr,36,0,0,name;
66 #define STABS_FUN_END(name)                                                  \
67   1: .stabs "",36,0,0,1b-name;
68
69 /* If compiled for profiling, call `mcount' at the start of each function.  */
70 #ifdef  PROF
71 /* The mcount code relies on a normal frame pointer being on the stack
72    to locate our caller, so push one just for its benefit.  */
73 #define CALL_MCOUNT \
74   pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp;
75 #else
76 #define CALL_MCOUNT             /* Do nothing.  */
77 #endif
78
79 #ifdef  NO_UNDERSCORES
80 /* Since C identifiers are not normally prefixed with an underscore
81    on this system, the asm identifier `syscall_error' intrudes on the
82    C name space.  Make sure we use an innocuous name.  */
83 #define syscall_error   __syscall_error
84 #define mcount          _mcount
85 #endif
86
87 #define PSEUDO(name, syscall_name, args)                                      \
88 lose: SYSCALL_PIC_SETUP                                                       \
89   jmp JUMPTARGET(syscall_error)                                               \
90   .globl syscall_error;                                                       \
91   ENTRY (name)                                                                \
92   DO_CALL (syscall_name, args);                                               \
93   jb lose
94
95 #undef  PSEUDO_END
96 #define PSEUDO_END(name)                                                      \
97   END (name)
98
99 #ifdef PIC
100 #define JUMPTARGET(name)        name##@PLT
101 #define SYSCALL_PIC_SETUP \
102     pushl %ebx;                                                               \
103     call 0f;                                                                  \
104 0:  popl %ebx;                                                                \
105     addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx;
106 #else
107 #define JUMPTARGET(name)        name
108 #define SYSCALL_PIC_SETUP       /* Nothing.  */
109 #endif
110
111 #endif  /* ASSEMBLER */