mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
9e2c0dae9b
_dl_profile_map only if the name matches. (_dl_start_user): Remember stack address. * sysdeps/m68k/elf/start.S: Pass new argument to __libc_start_user. Wed Jun 10 10:32:11 1998 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (elf_machine_runtime_setup): Set _dl_profile_map only if the name matches. (_dl_start_user): Remember stack address. * sysdeps/m68k/elf/start.S: Pass new argument to __libc_start_user.
83 lines
2.7 KiB
ArmAsm
83 lines
2.7 KiB
ArmAsm
/* Startup code compliant to the ELF m68k ABI.
|
|
Copyright (C) 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/m68k ABI says that when the entry point runs,
|
|
most registers' values are unspecified, except for:
|
|
|
|
%a1 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.
|
|
|
|
%sp The stack contains the arguments and environment:
|
|
0(%sp) argc
|
|
4(%sp) argv[0]
|
|
...
|
|
(4*argc)(%sp) NULL
|
|
(4*(argc+1))(%sp) envp[0]
|
|
...
|
|
NULL
|
|
*/
|
|
|
|
.text
|
|
.globl _start
|
|
_start:
|
|
/* Clear the frame pointer. The ABI suggests this be done, to mark
|
|
the outermost frame obviously. */
|
|
sub.l %fp, %fp
|
|
|
|
/* 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. */
|
|
move.l (%sp)+, %d0 /* Pop the argument count. */
|
|
move.l %sp, %a0 /* The argument vector starts just at the
|
|
current stack top. */
|
|
|
|
/* Provide the highest stack address to the user code (for stacks
|
|
which grow downward). */
|
|
pea (%sp)
|
|
|
|
pea (%a1) /* Push address of the shared library
|
|
termination function. */
|
|
|
|
/* Push the address of our own entry points to `.fini' and
|
|
`.init'. */
|
|
pea _fini
|
|
pea _init
|
|
|
|
pea (%a0) /* Push second argument: argv. */
|
|
move.l %d0, -(%sp) /* Push first argument: argc. */
|
|
|
|
pea main
|
|
|
|
/* Call the user's main function, and exit with its value. But
|
|
let the libc call main. */
|
|
jbsr __libc_start_main
|
|
|
|
illegal /* Crash if somehow `exit' does return. */
|
|
|
|
/* 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
|