diff options
author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-11-07 08:51:15 +0000 |
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committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-11-07 08:51:15 +0000 |
commit | 506a9f45b3b4659876b3bd29f6bff4027e18cc16 (patch) | |
tree | 5112bfaf7bce58daff20db3789e6d38592cacffe /sys/arch/mvme68k/stand/libsa/SRT0.S | |
parent | f94d56a7c698d9fd5de7b39ee39c61289a0e0f77 (diff) |
$Id$ throughout
update many copyrights
Diffstat (limited to 'sys/arch/mvme68k/stand/libsa/SRT0.S')
-rw-r--r-- | sys/arch/mvme68k/stand/libsa/SRT0.S | 104 |
1 files changed, 74 insertions, 30 deletions
diff --git a/sys/arch/mvme68k/stand/libsa/SRT0.S b/sys/arch/mvme68k/stand/libsa/SRT0.S index b2114fc3447..376a4597141 100644 --- a/sys/arch/mvme68k/stand/libsa/SRT0.S +++ b/sys/arch/mvme68k/stand/libsa/SRT0.S @@ -1,5 +1,34 @@ -| $NetBSD: SRT0.S,v 1.1.1.1 1995/07/25 23:12:21 chuck Exp $ +# $Id: SRT0.S,v 1.2 1995/11/07 08:50:40 deraadt Exp $ +| Copyright (c) 1995 Theo de Raadt +| +| Redistribution and use in source and binary forms, with or without +| modification, are permitted provided that the following conditions +| are met: +| 1. Redistributions of source code must retain the above copyright +| notice, this list of conditions and the following disclaimer. +| 2. Redistributions in binary form must reproduce the above copyright +| notice, this list of conditions and the following disclaimer in the +| documentation and/or other materials provided with the distribution. +| 3. All advertising materials mentioning features or use of this software +| must display the following acknowledgement: +| This product includes software developed under OpenBSD by +| Theo de Raadt for Willowglen Singapore. +| 4. The name of the author may not be used to endorse or promote products +| derived from this software without specific prior written permission. +| +| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS +| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +| ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY +| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +| OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +| OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +| SUCH DAMAGE. +| | Copyright (c) 1995 Gordon W. Ross | All rights reserved. | @@ -29,58 +58,73 @@ | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | SRT0.S - Stand-alone Run-Time startup code, part 0 - .file "SRT0.S" - .text - .globl __estack + .file "SRT0.S" + .text + .globl __estack __estack: - .globl start + .globl start start: | Check to see if the code is located correctly. | This SHOULD do a PC-relative load into a0, but... -| lea start, a0 | current location (0x4000) +| lea start, a0 | current location (0x4000) | XXX - GAS version 1.93 gets the above lea wrong! - .word 0x41fa - .word 0xfffe + .word 0x41fa + .word 0xfffe | Now force a long (not PC-relative) load to a1 and compare. - lea start:l, a1 | desired location (LINKADDR) - cmpl a0, a1 - beqs restart + lea start:l, a1 | desired location (LINKADDR) + cmpl a0, a1 + beqs restart | Relocate the code and data to where they belong. - movl #_edata,d0 | Desired end of program - subl a1,d0 | Calculate length, round up. - lsrl #2,d0 -Lcp: - movl a0@+, a1@+ - dbra d0, Lcp + movl #_edata,d2 | Desired end of program + subl a1,d2 | Calculate length, round up. + lsrl #2,d2 +Lcp: movl a0@+, a1@+ + dbra d2, Lcp | Force a long jump to the relocated code (not pc-relative) - lea restart:l, a0 - jmp a0@ + lea restart:l, a0 + jmp a0@ restart: | now in the relocated code - movl a6@(8), __cmd_buf | get cmd_line from sboot - | Set up stack (just before relocated text) - lea __estack:l, a0 - movl a0, sp - subl a6, a6 + lea __estack:l, a0 + movl a0, sp + subl a6, a6 + + movl d0, _devlun + movl d1, _ctrlun + movl a3, _oparg + movl a4, _opargend | Call the run-time startup C code, which will: | initialize, call main, call exit - jsr __start:l + jsr __start:l | If _start returns, fall into abort. - .globl _abort + .globl _abort _abort: - jsr 0x4000 + trap #0 | If abort returns, fall into reset. - .globl _reset + .globl _reset _reset: - reset - jmp _reset + reset + jmp _reset + +| function to get the vector base register + .globl _getvbr +_getvbr: + movc vbr, d0 + rts | The end. + + .data + .globl _devlun, _ctrlun, _oparg, _opargend +_devlun: .long 0 +_ctrlun: .long 0 +_oparg: .long 0 +_opargend: .long 0 |