glibc/sysdeps/i386/elf/start.S
Ulrich Drepper 3db52d94e2 Update.
1998-03-08 14:58  Ulrich Drepper  <drepper@cygnus.com>

	* Makeconfig (nisobjdir): Set to path to nis directory.
	(rpath-link): Add nisobjdir.
	Patch by Sven Verdoolaege <skimo@kotnet.org>.

	* elf/Makefile: Pretty print.
	* elf/dl-lookup.c: Include unistd.h.
	* elf/dl-runtime.c: Likewise.

	* localedata/Makefile (test-srcs): Add tst-rpmatch.
	(distribute): Add tst-rpmatch.sh.
	(tests): Add tst-rpmatch to dependency list and run tst-rpmatch.sh.

	New tests for rpmatch function by
	Jochen Hein <jochen.hein@delphi.central.de>.
	* localedata/tst-rpmatch.c: New file.
	* localedata/tst-rpmatch.sh: New file.

	* localedata/locales/de_DE: Correct yesexpr and noexpr.
	* localedata/locales/de_AT: Likewise.

	* posix/getopt.c: Update contact address.
	* posix/getopt1.c: Pretty print.

	* sysdeps/generic/libc-start.c: Do most of the initialization now
	here instead of in start.S.
	* sysdeps/unix/sysv/linux/libc-start.c: Likewise.
	* sysdeps/i386/elf/start.S: Remove most of the initialization code.

	* sysdeps/unix/sysv/linux/i386/profil-counter.h: No need for
	profil_counter to be public.

1998-03-08 13:06  Tim Waugh  <tim@cyberelk.demon.co.uk>

	* posix/wordexp.c (parse_arith): Now works for negative numbers too.
	(parse_param): Coded parameter length expansion (${#var}).
	(parse_param): Handling for "=", "+", "-", and the ":" versions added.
	(parse_param): Cleaned up (fixed) error handling.

	* posix/wordexp-test.c: IFS now includes non-whitespace character
	(comma).  Added more tests.
1998-03-08 15:26:29 +00:00

88 lines
3 KiB
ArmAsm

/* Startup code compliant to the ELF i386 ABI.
Copyright (C) 1995, 1996, 1997, 1998 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 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. */
/* 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
point runs, most registers' values are unspecified, except for:
%edx Contains a function pointer to be registered with `atexit'.
This is how the dynamic linker arranges to have DT_FINI
functions called for shared libraries that have been loaded
before this code runs.
%esp The stack contains the arguments and environment:
0(%esp) argc
4(%esp) argv[0]
...
(4*argc)(%esp) NULL
(4*(argc+1))(%esp) envp[0]
...
NULL
*/
.text
.globl _start
_start:
/* Clear the frame pointer. The ABI suggests this be done, to mark
the outermost frame obviously. */
xorl %ebp, %ebp
/* Extract the arguments as encoded on the stack and set up
the arguments for `main': argc, argv. envp will be determined
later in __libc_start_main. */
popl %esi /* Pop the argument count. */
movl %esp, %ecx /* 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 %edx /* Push address of the shared library
termination function. */
/* Push address of our own entry points to .fini and .init. */
pushl $_fini
pushl $_init
pushl %ecx /* Push second argument: argv. */
pushl %esi /* Push first argument: argc. */
pushl $main
/* Call the user's main function, and exit with its value.
But let the libc call main. */
call __libc_start_main
hlt /* Crash if somehow `exit' does return. */
/* To fulfill the System V/i386 ABI we need this symbol. Yuck, it's so
meaningless since we don't support machines < 80386. */
.section .rodata
.globl _fp_hw
.long 3
.size _fp_hw, 4
/* Define a symbol for the first piece of initialized data. */
.data
.globl __data_start
__data_start:
.long 0
.weak data_start
data_start = __data_start