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authorUlrich Drepper <drepper@redhat.com>1997-01-30 04:09:36 +0000
committerUlrich Drepper <drepper@redhat.com>1997-01-30 04:09:36 +0000
commit19361cb768c280e47f2ca69ed63e1d75f332e592 (patch)
tree785385b6029dfd47c9d2b6309b9eb6c5b3b4f59f /sysdeps/i386/elf
parent56552e4257910954051f3ff02c0ee2609c7ca688 (diff)
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update from main archive 970129cvs/libc-970201cvs/libc-970131cvs/libc-970130
1997-01-30 03:24 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/elf/start.S (_start): Align stack pointer to double word boundary before pushing args for main. This way we don't get penalties for misaligned memory accesses. Reported by Edward Seidl <seidl@janed.com>. * Makefile: Correct *my* changes of Richards patch of 1997-01-28 10:51. Patch by HJ Lu. * misc/bsd-compat.c: Update copyright. * misc/efgcvt.c: Likewise. * misc/efgcvt_r.c: Likewise. * misc/error.c: Likewise. * misc/error.h: Likewise. * misc/fstab.c: Likewise. * misc/init-misc.c: Likewise. * misc/lsearch.c: Likewise. * misc/mntent.c: Likewise. * misc/qefgcvt.c: Likewise. * misc/qefgcvt_r.c: Likewise. * nss/databases.def: Likewise. * nss/db-Makefile: Likewise. * nss/ethers-lookup.c: Likewise. * nss/hosts-lookup.c: Likewise. * nss/netgrp-lookup.c: Likewise. * nss/nsswitch.h: Likewise. * nss/proto-lookup.c: Likewise. * nss/rpc-lookup.c: Likewise. * nss/service-lookup.c: Likewise. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_files/files-grp.c: Likewise. * nss/nss_files/files-hosts.c: Likewise. * nss/nss_files/files-network.c: Likewise. * nss/nss_files/files-proto.c: Likewise. * nss/nss_files/files-pwd.c: Likewise. * nss/nss_files/files-rpc.c: Likewise. * nss/nss_files/files-service.c: Likewise. * nss/nss_files/files-spwd.c: Likewise. * shadow/fgetspent.c: Likewise. * shadow/fgetspent_r.c: Likewise. * shadow/getspent.c: Likewise. * shadow/getspent_r.c: Likewise. * shadow/getspnam.c: Likewise. * shadow/getspnam_r.c: Likewise. * shadow/putspent.c: Likewise. * shadow/sgetspent.c: Likewise. * shadow/sgetspent_r.c: Likewise. * sysdeps/i386/init-first.c: Likewise. * sysdeps/unix/i386/sysdep.S: Likewise. * shadow/shadow.h: Don't use __USE_REENTRENT. All code must be prepared to be running in a multi-threaded environment. Change to __USE_MISC unless the function is defined in POSIX.1 (in this case also test for __USE_POSIX). * dirent/dirent.h: Likewise. * grp/grp.h: Likewise. * inet/aliases.h: Likewise. * libio/libio.h: Likewise. * libio/stdio.h: Likewise. * login/utmp.h: Likewise. * math/mathcalls.h: Likewise. * misc/mntent.h: Likewise. * pwd/pwd.h: Likewise. * resolv/netdb.h: Likewise. * stdlib/stdlib.h: Likewise. * string/string.h: Likewise. * sunrpc/rpc/netdb.h: Likewise. * sysdeps/generic/crypt.h: Likewise. * sysdeps/unix/sysv/linux/errnos.h: Likewise. * time/time.h: Likewise. 1997-01-30 00:27 Fila Kolodny <fila@ibi.com> * sunrpc/Makefile (install-others): Add rpcsvc/bootparam_prot.h only if not cross compiling. 1997-01-29 16:16 Fila Kolodny <fila@ibi.com> * sysdeps/posix/sigpause.c: Include <stddef.h> to get definition of NULL. * sysdeps/posix/sigwait.c: Likewise. 1997-01-28 23:42 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makeconfig ($(common-objpfx)config.make): Depend on $(..)config.make.in.
Diffstat (limited to 'sysdeps/i386/elf')
-rw-r--r--sysdeps/i386/elf/start.S51
1 files changed, 29 insertions, 22 deletions
diff --git a/sysdeps/i386/elf/start.S b/sysdeps/i386/elf/start.S
index c5796e8..53e324b 100644
--- a/sysdeps/i386/elf/start.S
+++ b/sysdeps/i386/elf/start.S
@@ -1,21 +1,21 @@
/* Startup code compliant to the ELF i386 ABI.
-Copyright (C) 1995 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+ Copyright (C) 1995, 1996, 1997 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
-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 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.
+ 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., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ 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. */
/* This is the canonical entry point, usually the first thing in the text
segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry
@@ -36,12 +36,12 @@ Cambridge, MA 02139, USA. */
NULL
*/
- .text
+ .text
.globl _start
_start:
/* Clear the frame pointer. The ABI suggests this be done, to mark
the outermost frame obviously. */
- movl $0, %ebp
+ xorl %ebp, %ebp
/* %edx contains the address of the shared library termination
function, which we will register with `atexit' to be called by
@@ -53,7 +53,8 @@ _start:
jz nofini
pushl %edx
call atexit
- addl $4, %esp
+ popl %eax /* Pop value to unused register to remove
+ argument from stack. */
nofini:
/* Do essential libc initialization. In statically linked
@@ -66,9 +67,15 @@ nofini:
popl %esi /* Pop the argument count. */
leal 4(%esp,%esi,4), %eax /* envp = &argv[argc + 1] */
movl %eax, _environ /* Store it in the global variable. */
+ movl %esp, %edx /* argv starts just at the current stack top.*/
+
+ /* Before pushing the arguments align the stack to a double word
+ boundary to avoid penalties from misaligned accesses. Thanks
+ to Edward Seidl <seidl@janed.com> for pointing this out. */
+ andl $0xfffffff8, %esp
+
pushl %eax /* Push third argument: envp. */
- leal 4(%esp), %eax /* argv starts just above that word. */
- pushl %eax /* Push second argument: argv. */
+ pushl %edx /* Push second argument: argv. */
pushl %esi /* Push first argument: argc. */
/* Call `_init', which is the entry point to our own `.init'
@@ -77,13 +84,13 @@ nofini:
call _init
pushl $_fini
call atexit
- addl $4, %esp
+ popl %eax
/* Call the user's main function, and exit with its value. */
call main
pushl %eax
- call exit /* This should never return. */
- hlt /* Crash if somehow it does return. */
+ call exit
+ hlt /* Crash if somehow `exit' does return. */
/* Define a symbol for the first piece of initialized data. */
.data