73 lines
1.6 KiB
ArmAsm
73 lines
1.6 KiB
ArmAsm
|
/*
|
||
|
|
* crt0.S for the Blackfin processor
|
||
|
|
*
|
||
|
|
* Copyright (C) 2006 Analog Devices, Inc.
|
||
|
|
*
|
||
|
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
||
|
|
* and license this software and its documentation for any purpose, provided
|
||
|
|
* that existing copyright notices are retained in all copies and that this
|
||
|
|
* notice is included verbatim in any distributions. No written agreement,
|
||
|
|
* license, or royalty fee is required for any of the authorized uses.
|
||
|
|
* Modifications to this software may be copyrighted by their authors
|
||
|
|
* and need not follow the licensing terms described here, provided that
|
||
|
|
* the new terms are clearly indicated on the first page of each file where
|
||
|
|
* they apply.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
|
||
|
|
.global __start
|
||
|
|
__start:
|
||
|
|
|
||
|
|
/* Start by setting up a stack */
|
||
|
|
link 0xc;
|
||
|
|
/* Zero the memory in the .bss section. */
|
||
|
|
|
||
|
|
p0.l = __edata;
|
||
|
|
p0.h = __edata;
|
||
|
|
p1.l = __end;
|
||
|
|
p1.h = __end;
|
||
|
|
p1 -= p0;
|
||
|
|
r0 = 0;
|
||
|
|
lsetup (L$L$clear_bss, L$L$clear_bss) lc0 = p1;
|
||
|
|
L$L$clear_bss:
|
||
|
|
B [p0++] = r0;
|
||
|
|
|
||
|
|
#ifdef __BFIN_FDPIC__
|
||
|
|
/* Set up GOT pointer. */
|
||
|
|
P0.L = __ROFIXUP_END__;
|
||
|
|
P0.H = __ROFIXUP_END__;
|
||
|
|
P4 = [P0 - 4];
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Need to set up standard file handles */
|
||
|
|
/* Parse string at r1 */
|
||
|
|
|
||
|
|
p0.l = __init;
|
||
|
|
p0.h = __init;
|
||
|
|
P3 = P4;
|
||
|
|
call (p0)
|
||
|
|
|
||
|
|
p0.l = _atexit;
|
||
|
|
p0.h = _atexit;
|
||
|
|
#ifdef __BFIN_FDPIC__
|
||
|
|
r0 = [P4 + __fini@FUNCDESC_GOT17M4] ;
|
||
|
|
P3 = P4;
|
||
|
|
#else
|
||
|
|
r0.l = __fini;
|
||
|
|
r0.h = __fini;
|
||
|
|
#endif
|
||
|
|
call (p0)
|
||
|
|
|
||
|
|
p0.l = ___setup_argv_and_call_main;
|
||
|
|
p0.h = ___setup_argv_and_call_main;
|
||
|
|
P3 = P4;
|
||
|
|
call (p0)
|
||
|
|
|
||
|
|
p0.l = _exit;
|
||
|
|
p0.h = _exit;
|
||
|
|
P3 = P4;
|
||
|
|
jump (p0) /* Should not return. */
|
||
|
|
nop;
|