mirror of
https://sourceware.org/git/glibc.git
synced 2024-10-01 03:27:48 +00:00
ee63ca212c
* sysdeps/unix/i386/sysdep.S (syscall_error): Push & pop space for BP return value & push implicit struct-return pointer to __errno_location. * sysdeps/unix/sysv/linux/i386/sysdep.h: Likewise. (SYSCALL_ERROR_HANDLER): Likewise. * sysdeps/unix/sysv/linux/i386/i686/sysdep.h (SYSCALL_ERROR_HANDLER): Likewise. * sysdeps/i386/bp-asm.h (POP_ERRNO_LOCATION_RETURN): Fold insns. * sysdeps/unix/i386/sysdep.S (syscall_error): Push & pop space for BP return value & push implicit struct-return pointer to __errno_location. * sysdeps/unix/sysv/linux/i386/sysdep.h: Likewise. (SYSCALL_ERROR_HANDLER): Likewise. * sysdeps/unix/sysv/linux/i386/i686/sysdep.h (SYSCALL_ERROR_HANDLER): Likewise. * Makeconfig (CPPFLAGS-.ob): Pass -fbounded-pointers for all files *.[cS].
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/* Copyright (C) 1998, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper, <drepper@cygnus.com>, 1998.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _LINUX_I386_I686_SYSDEP_H
|
|
#define _LINUX_I386_I686_SYSDEP_H 1
|
|
|
|
/* There is some commonality. */
|
|
#include <sysdeps/unix/sysv/linux/i386/sysdep.h>
|
|
#include <bp-sym.h>
|
|
#include <bp-asm.h>
|
|
|
|
/* We define special versions of the error handler code to match the i686's
|
|
deep branch prediction mechanism. */
|
|
#ifdef PIC
|
|
# undef SYSCALL_ERROR_HANDLER
|
|
|
|
/* Store (- %eax) into errno through the GOT. */
|
|
# ifdef _LIBC_REENTRANT
|
|
# define SYSCALL_ERROR_HANDLER \
|
|
1:movl (%esp),%ebx; \
|
|
ret; \
|
|
0:pushl %ebx; \
|
|
call 1b; \
|
|
addl $_GLOBAL_OFFSET_TABLE_, %ebx; \
|
|
xorl %edx, %edx; \
|
|
subl %eax, %edx; \
|
|
pushl %edx; \
|
|
PUSH_ERRNO_LOCATION_RETURN; \
|
|
call BP_SYM (__errno_location)@PLT; \
|
|
POP_ERRNO_LOCATION_RETURN; \
|
|
popl %ecx; \
|
|
popl %ebx; \
|
|
movl %ecx, (%eax); \
|
|
orl $-1, %eax; \
|
|
jmp L(pseudo_end);
|
|
/* A quick note: it is assumed that the call to `__errno_location' does
|
|
not modify the stack! */
|
|
# else
|
|
# define SYSCALL_ERROR_HANDLER \
|
|
1:movl (%esp),%ecx; \
|
|
ret; \
|
|
0:call 1b; \
|
|
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
|
|
xorl %edx, %edx; \
|
|
subl %eax, %edx; \
|
|
movl errno@GOT(%ecx), %ecx; \
|
|
movl %edx, (%ecx); \
|
|
orl $-1, %eax; \
|
|
jmp L(pseudo_end);
|
|
# endif /* _LIBC_REENTRANT */
|
|
#endif /* PIC */
|
|
|
|
#endif /* linux/i386/i686/sysdep.h */
|