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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/* Copyright (C) 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@cygnus.com>, 1998.
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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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#ifndef _LINUX_I386_I686_SYSDEP_H
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#define _LINUX_I386_I686_SYSDEP_H 1
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/* There is some commonality. */
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#include <sysdeps/unix/sysv/linux/i386/sysdep.h>
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#include <bp-sym.h>
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#include <bp-asm.h>
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/* We define special versions of the error handler code to match the i686's
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deep branch prediction mechanism. */
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#ifdef PIC
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# undef SYSCALL_ERROR_HANDLER
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/* Store (- %eax) into errno through the GOT. */
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# ifdef _LIBC_REENTRANT
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# define SYSCALL_ERROR_HANDLER \
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1:movl (%esp),%ebx; \
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ret; \
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0:pushl %ebx; \
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call 1b; \
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addl $_GLOBAL_OFFSET_TABLE_, %ebx; \
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xorl %edx, %edx; \
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subl %eax, %edx; \
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pushl %edx; \
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PUSH_ERRNO_LOCATION_RETURN; \
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call BP_SYM (__errno_location)@PLT; \
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POP_ERRNO_LOCATION_RETURN; \
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popl %ecx; \
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popl %ebx; \
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movl %ecx, (%eax); \
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orl $-1, %eax; \
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jmp L(pseudo_end);
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/* A quick note: it is assumed that the call to `__errno_location' does
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not modify the stack! */
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# else
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# define SYSCALL_ERROR_HANDLER \
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1:movl (%esp),%ecx; \
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ret; \
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0:call 1b; \
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addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
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xorl %edx, %edx; \
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subl %eax, %edx; \
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movl errno@GOT(%ecx), %ecx; \
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movl %edx, (%ecx); \
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orl $-1, %eax; \
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jmp L(pseudo_end);
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# endif /* _LIBC_REENTRANT */
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#endif /* PIC */
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#endif /* linux/i386/i686/sysdep.h */
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