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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [linuxthreads/] [machine/] [i386/] [i386-sysdep.h] - Blame information for rev 207

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1 207 jeremybenn
/* Assembler macros for i386.
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   Copyright (C) 1991, 92, 93, 95, 96, 98 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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   02111-1307 USA.  */
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#define NO_UNDERSCORES
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#include <generic-sysdep.h>
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#ifdef  __ASSEMBLER__
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/* Syntactic details of assembler.  */
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#ifdef HAVE_ELF
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/* ELF uses byte-counts for .align, most others use log2 of count of bytes.  */
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#define ALIGNARG(log2) 1<<log2
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/* For ELF we need the `.type' directive to make shared libs work right.  */
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#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
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#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
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/* In ELF C symbols are asm symbols.  */
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#undef  NO_UNDERSCORES
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#define NO_UNDERSCORES
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#else
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#define ALIGNARG(log2) log2
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#define ASM_TYPE_DIRECTIVE(name,type)   /* Nothing is specified.  */
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#define ASM_SIZE_DIRECTIVE(name)        /* Nothing is specified.  */
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#endif
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/* Define an entry point visible from C.
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   There is currently a bug in gdb which prevents us from specifying
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   incomplete stabs information.  Fake some entries here which specify
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   the current source file.  */
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#define ENTRY(name)                                                           \
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  STABS_CURRENT_FILE1("")                                                     \
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  STABS_CURRENT_FILE(name)                                                    \
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  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);                                   \
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  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)                          \
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  .align ALIGNARG(4);                                                         \
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  STABS_FUN(name)                                                             \
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  C_LABEL(name)                                                               \
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  CALL_MCOUNT
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#undef  END
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#define END(name)                                                             \
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  ASM_SIZE_DIRECTIVE(name)                                                    \
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  STABS_FUN_END(name)
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/* Remove the following two lines once the gdb bug is fixed.  */
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#define STABS_CURRENT_FILE(name)                                              \
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  STABS_CURRENT_FILE1 (#name)
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#define STABS_CURRENT_FILE1(name)                                             \
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  1: .stabs name,100,0,0,1b;
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/* Emit stabs definition lines.  We use F(0,1) and define t(0,1) as `int',
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   the same way gcc does it.  */
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#define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1))
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#define STABS_FUN2(name, namestr)                                             \
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  .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0;                  \
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  .stabs #namestr,36,0,0,name;
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#define STABS_FUN_END(name)                                                   \
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  1: .stabs "",36,0,0,1b-name;
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/* If compiled for profiling, call `mcount' at the start of each function.  */
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#ifdef  PROF
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/* The mcount code relies on a normal frame pointer being on the stack
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   to locate our caller, so push one just for its benefit.  */
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#define CALL_MCOUNT \
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  pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp;
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#else
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#define CALL_MCOUNT             /* Do nothing.  */
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#endif
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#ifdef  NO_UNDERSCORES
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/* Since C identifiers are not normally prefixed with an underscore
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   on this system, the asm identifier `syscall_error' intrudes on the
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   C name space.  Make sure we use an innocuous name.  */
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#define syscall_error   __syscall_error
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#define mcount          _mcount
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#endif
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#define PSEUDO(name, syscall_name, args)                                      \
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lose: SYSCALL_PIC_SETUP                                                       \
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  jmp JUMPTARGET(syscall_error)                                               \
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  .globl syscall_error;                                                       \
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  ENTRY (name)                                                                \
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  DO_CALL (syscall_name, args);                                               \
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  jb lose
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#undef  PSEUDO_END
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#define PSEUDO_END(name)                                                      \
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  END (name)
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#ifdef PIC
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#define JUMPTARGET(name)        name##@PLT
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#define SYSCALL_PIC_SETUP \
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    pushl %ebx;                                                               \
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    call 0f;                                                                  \
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0:  popl %ebx;                                                                 \
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    addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx;
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#else
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#define JUMPTARGET(name)        name
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#define SYSCALL_PIC_SETUP       /* Nothing.  */
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#endif
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/* Local label name for asm code. */
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#ifndef L
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#define L(name)         name
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#endif
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#endif  /* __ASSEMBLER__ */

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