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.
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.
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.
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. */
20 #include <sysdeps/generic/sysdep.h>
24 /* Syntactic details of assembler. */
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;
34 /* In ELF C symbols are asm symbols. */
36 #define NO_UNDERSCORES
40 #define ALIGNARG(log2) log2
41 #define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
42 #define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
47 /* Define an entry point visible from C. */
49 ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
50 ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
58 ASM_SIZE_DIRECTIVE(name) \
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;
69 /* If compiled for profiling, call `mcount' at the start of each function. */
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. */
74 pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp;
76 #define CALL_MCOUNT /* Do nothing. */
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
87 #define PSEUDO(name, syscall_name, args) \
88 lose: SYSCALL_PIC_SETUP \
89 jmp JUMPTARGET(syscall_error) \
90 .globl syscall_error; \
92 DO_CALL (syscall_name, args); \
96 #define PSEUDO_END(name) \
100 #define JUMPTARGET(name) name##@PLT
101 #define SYSCALL_PIC_SETUP \
105 addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx;
107 #define JUMPTARGET(name) name
108 #define SYSCALL_PIC_SETUP /* Nothing. */
111 #endif /* ASSEMBLER */