OpenE2K/glibc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* sysdeps/i386/bp-asm.h (POP_ERRNO_LOCATION_RETURN): Fold insns.

Browse Source 
* 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].
This commit is contained in:
Greg McGary 2000-06-27 01:52:26 +00:00
parent 58ff985dd4
commit ee63ca212c
4 changed files with 37 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
ChangeLog
View File

@ -1,5 +1,14 @@
2000-06-26 Greg McGary <greg@mcgary.org>
* 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: Add missing comment.
* csu/Makefile (extra-objs, omit-deps, install-lib): Add
BP-flavored startup object.
@ -828,8 +837,8 @@
2000-06-07 Greg McGary <greg@mcgary.org>
* Makeconfig (CPPFLAGS-.ob): Pass -fbounded-pointers for all files
*.[cS].
* Makeconfig (CPPFLAGS-.ob): Pass -fbounded-pointers
for all files *.[cS].
(CFLAGS-.ob): Don't optimize sibling calls.
(bppfx): New variable.
* Makerules (elide-bp-thunks): New variable.

24
sysdeps/unix/i386/sysdep.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -19,6 +19,8 @@
#include <sysdep.h>
#define _ERRNO_H
#include <bits/errno.h>
#include <bp-asm.h>
#include <bp-sym.h>
.globl C_SYMBOL_NAME(errno)
.globl syscall_error
@ -39,31 +41,35 @@ syscall_error:
notb:
#endif
#ifndef PIC
#ifndef _LIBC_REENTRANT
# ifndef _LIBC_REENTRANT
movl %eax, C_SYMBOL_NAME(errno)
#else
# else
pushl %eax
call __errno_location
PUSH_ERRNO_LOCATION_RETURN
call BP_SYM (__errno_location)
POP_ERRNO_LOCATION_RETURN
popl %ecx
movl %ecx, (%eax)
#endif
# endif
#else
/* The caller has pushed %ebx and then set it up to
point to the GOT before calling us through the PLT. */
#ifndef _LIBC_REENTRANT
# ifndef _LIBC_REENTRANT
movl C_SYMBOL_NAME(errno@GOT)(%ebx), %ecx
/* Pop %ebx value saved before jumping here. */
popl %ebx
movl %eax, (%ecx)
#else
# else
pushl %eax
call C_SYMBOL_NAME(__errno_location@PLT)
PUSH_ERRNO_LOCATION_RETURN
call C_SYMBOL_NAME (BP_SYM (__errno_location)@PLT)
POP_ERRNO_LOCATION_RETURN
popl %ecx
/* Pop %ebx value saved before jumping here. */
popl %ebx
movl %ecx, (%eax)
#endif
# endif
#endif
movl $-1, %eax
ret

6
sysdeps/unix/sysv/linux/i386/i686/sysdep.h
View File

@ -22,6 +22,8 @@
/* 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. */
@ -39,7 +41,9 @@
xorl %edx, %edx; \
subl %eax, %edx; \
pushl %edx; \
call __errno_location@PLT; \
PUSH_ERRNO_LOCATION_RETURN; \
call BP_SYM (__errno_location)@PLT; \
POP_ERRNO_LOCATION_RETURN; \
popl %ecx; \
popl %ebx; \
movl %ecx, (%eax); \

8
sysdeps/unix/sysv/linux/i386/sysdep.h
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1992, 93, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
/* Copyright (C) 1992, 93, 95, 96, 97, 98, 99, 00 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.org>, August 1995.
@ -22,6 +22,8 @@
/* There is some commonality. */
#include <sysdeps/unix/i386/sysdep.h>
#include <bp-sym.h>
#include <bp-asm.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
@ -82,7 +84,9 @@
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx; \
subl %eax, %edx; \
pushl %edx; \
call __errno_location@PLT; \
PUSH_ERRNO_LOCATION_RETURN; \
call BP_SYM (__errno_location)@PLT; \
POP_ERRNO_LOCATION_RETURN; \
popl %ecx; \
popl %ebx; \
movl %ecx, (%eax); \