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/* Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
This file was pretty much copied from newlib.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)
GCC 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef __SH5__
.section .data,"aw"
.global ___data
___data:
.section .rodata,"a"
.global ___rodata
___rodata:
#if __SH5__ == 64
.section .text,"ax"
#define LOAD_ADDR(sym, reg) \
movi (sym >> 48) & 65535, reg; \
shori (sym >> 32) & 65535, reg; \
shori (sym >> 16) & 65535, reg; \
shori sym & 65535, reg
#else
.mode SHmedia
.section .text..SHmedia32,"ax"
#define LOAD_ADDR(sym, reg) \
movi (sym >> 16) & 65535, reg; \
shori sym & 65535, reg
#endif
.global start
start:
LOAD_ADDR (_stack, r15)
pt/l .Lzero_bss_loop, tr0
pt/l _atexit, tr1
pt/l _init, tr5
pt/l ___setup_argv_and_call_main, tr6
pt/l _exit, tr7
! zero out bss
LOAD_ADDR (_edata, r0)
LOAD_ADDR (_end, r1)
.Lzero_bss_loop:
stx.q r0, r63, r63
addi r0, 8, r0
bgt/l r1, r0, tr0
LOAD_ADDR (___data, r26)
LOAD_ADDR (___rodata, r27)
#if ! __SH4_NOFPU__
#if __SH5__ == 32
pt/l ___set_fpscr, tr0
movi 0, r4
blink tr0, r18
#endif
getcon sr, r0
! enable the FP unit, by resetting SR.FD
! also zero out SR.FR, SR.SZ and SR.PR, as mandated by the ABI
movi 0, r1
shori 0xf000, r1
andc r0, r1, r0
putcon r0, sr
#endif
! arrange for exit to call fini
LOAD_ADDR (_fini, r2)
blink tr1, r18
! call init
blink tr5, r18
! call the mainline
blink tr6, r18
! call exit
blink tr7, r18
#else
.section .text
.global start
start:
mov.l stack_k,r15
! zero out bss
mov.l edata_k,r0
mov.l end_k,r1
mov #0,r2
start_l:
mov.l r2,@r0
add #4,r0
cmp/ge r0,r1
bt start_l
#if defined (__SH2E__) || defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__)
mov.l set_fpscr_k, r1
jsr @r1
mov #0,r4
lds r3,fpscr
#endif /* defined (__SH2E__) || defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) */
! arrange for exit to call fini
mov.l atexit_k,r0
mov.l fini_k,r4
jsr @r0
nop
! call init
mov.l init_k,r0
jsr @r0
nop
! call the mainline
mov.l main_k,r0
jsr @r0
nop
! call exit
mov r0,r4
mov.l exit_k,r0
jsr @r0
nop
.align 2
#if defined (__SH2E__) || defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__)
set_fpscr_k:
.long ___set_fpscr
#endif /* defined (__SH2E__) || defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) */
stack_k:
.long _stack
edata_k:
.long _edata
end_k:
.long _end
main_k:
.long ___setup_argv_and_call_main
exit_k:
.long _exit
atexit_k:
.long _atexit
init_k:
.long _init
fini_k:
.long _fini
! supplied for backward compatibility only, in case of linking
! code whose main() was compiled with an older version of GCC.
.global ___main
___main:
rts
nop
#endif
|
