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/* Copyright (C) 1991, 1992 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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/* When we enter this piece of code, the user stack looks like this:
* argc argument counter (integer)
* argv[0] program name (pointer)
* argv[1...N] program args (pointers)
* NULL
* env[0...N] environment variables (pointers)
* NULL
* When we are done here, we want
* R0=argc
* R1=*argv[0]
* R2=*envp[0]
*/
#include <features.h>
.text
.align 2
.global __start;
.type __start,STT_FUNC;
.global ___uClibc_main;
.type ___uClibc_main,STT_FUNC;
/* Stick in a dummy reference to main(), so that if an application
* is linking when the main() function is in a static library (.a)
* we can be sure that main() actually gets linked in */
.type _main,STT_FUNC;
__start:
#ifdef __BFIN_FDPIC__
/* P0 contains a pointer to the program's load map. */
call .Lcall;
.Lcall:
R4 = RETS;
SP += -12;
R0.L = .Lcall;
R0.H = .Lcall;
R1.L = __ROFIXUP_LIST__;
R1.H = __ROFIXUP_LIST__;
R2.L = __ROFIXUP_END__;
R2.H = __ROFIXUP_END__;
R1 = R1 - R0;
R1 = R1 + R4;
R2 = R2 - R0;
R2 = R2 + R4;
R0 = P0;
CALL ___self_reloc;
SP += 12;
P3 = R0;
#endif
/* clear the frame pointer and the L registers. */
FP = 0;
L0 = 0;
L1 = 0;
L2 = 0;
L3 = 0;
/* Load register R1 (argc) from the stack to its final resting place */
P0 = SP;
R1 = [P0++];
/* Copy argv pointer into R2 -- which its final resting place */
R2 = P0;
/* Skip to the end of argv and put a pointer to the environment in
[SP + 12] */
R3 = R1;
R3 <<= 2;
R3 += 4;
R3 = R2 + R3;
SP += -24;
[SP + 12] = R3;
/* Ok, now run uClibc's main() -- shouldn't return */
#if defined L_crt1 && defined __UCLIBC_CTOR_DTOR__
#ifdef __BFIN_FDPIC__
R3 = [P3 + __init@FUNCDESC_GOT17M4];
#else
R3.H = __init;
R3.L = __init;
#endif
[SP+16] = R3;
#ifdef __BFIN_FDPIC__
R3 = [P3 + __fini@FUNCDESC_GOT17M4];
#else
R3.H = __fini;
R3.L = __fini;
#endif
[SP+20] = R3;
#else /* no ctor/dtor handling */
R3 = 0;
[SP + 16] = R3;
[SP + 20] = R3;
#endif
#ifdef __BFIN_FDPIC__
R0 = [P3 + _main@FUNCDESC_GOT17M4];
#else
R0.H = _main;
R0.L = _main;
#endif
jump.l ___uClibc_main;
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