mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 21:40:12 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
136 lines
3.5 KiB
ArmAsm
136 lines
3.5 KiB
ArmAsm
/* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
|
|
Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
|
|
On-Line Applications Research Corporation.
|
|
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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
/* entry.s
|
|
*
|
|
* This file contains the entry point for the application.
|
|
* The name of this entry point is compiler dependent.
|
|
* It jumps to the BSP which is responsible for performing
|
|
* all initialization.
|
|
*
|
|
*/
|
|
|
|
.text
|
|
.globl start # GNU960 default entry point
|
|
|
|
start:
|
|
mov 3, r12
|
|
modpc r12, r12, r12 # enable tracing/trace faults
|
|
mov g5, g5 # NOP
|
|
mov 0, g14 # initialize constant for C
|
|
|
|
/*
|
|
* zero out uninitialized data area
|
|
*/
|
|
zerobss:
|
|
lda _end, r4 /* find end of .bss */
|
|
lda _bss_start, r5 /* find beginning of .bss */
|
|
ldconst 0, r6
|
|
|
|
loop: st r6, (r5) /* to zero out uninitialized */
|
|
addo 4, r5, r5 /* data area */
|
|
cmpobl r5, r4, loop /* loop until _end reached */
|
|
|
|
|
|
lda heap_memory, r12 /* tell C lib where heap is */
|
|
st r12,___C_heap_start
|
|
lda heap_size, r12 /* tell C lib how big heap is */
|
|
st r12,___C_heap_size
|
|
lda stack_memory,r12 /* set up stack pointer: */
|
|
mov r12, sp
|
|
mov 0, g14 /* initialize constant for C */
|
|
|
|
call init_frames
|
|
ret /* return to monitor */
|
|
|
|
init_frames:
|
|
ldconst 0x3b001000, g0
|
|
ldconst 0x00009107, g1
|
|
modac g1, g0, g0 /* set AC controls */
|
|
|
|
/*
|
|
* Call application mainline.
|
|
* Someday, real values of argc and argv will be set up.
|
|
* For now, they are set to 0.
|
|
*/
|
|
|
|
callx __Board_Initialize /* Initialize the board */
|
|
|
|
ldconst 0,g0
|
|
ldconst 0,g1
|
|
ldconst 0,g2
|
|
callx ___libc_init /* initialize the library and */
|
|
/* call main */
|
|
/*
|
|
* if we return from main, we have "fallen" off the end
|
|
* of the program, therefore status is 0
|
|
* so move 0 to g0 (exit parameter)
|
|
*/
|
|
|
|
mov 0, g0
|
|
callx __exit
|
|
ret
|
|
|
|
|
|
/*
|
|
* Data Declarations. Start with a macro which helps declare space.
|
|
*/
|
|
|
|
#define DECLARE_SPACE(_name,_space,_align) \
|
|
.globl _name ; \
|
|
.align _align ; \
|
|
.comm _name##,_space
|
|
|
|
#define DECLARE_LABEL(_name) \
|
|
.globl _name ; \
|
|
_name##:
|
|
|
|
#define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2)
|
|
#define DECLARE_U32(_name) DECLARE_SPACE(_name,4,2)
|
|
#define DECLARE_U16(_name) DECLARE_SPACE(_name,2,1)
|
|
|
|
/*
|
|
* Require environment stuff
|
|
*/
|
|
|
|
DECLARE_LABEL(_environ)
|
|
DECLARE_PTR(environ)
|
|
|
|
DECLARE_LABEL(_errno)
|
|
DECLARE_U32(errno)
|
|
|
|
/*
|
|
* Stack Size and Space
|
|
*/
|
|
|
|
.set stack_size, 0x20000
|
|
|
|
DECLARE_SPACE(stack_memory,stack_size,4)
|
|
DECLARE_LABEL(stack_end)
|
|
|
|
/*
|
|
* Heap Size and Space
|
|
*/
|
|
|
|
.set heap_size, 0x20000
|
|
|
|
DECLARE_SPACE(heap_memory,heap_size,4)
|
|
DECLARE_LABEL(heap_end)
|