/* $NetBSD: rmheader.S,v 1.4 2005/12/11 12:16:08 christos Exp $ */ /*- * Copyright (c) 2001 Ben Harris * All rights reserved. * * 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. 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. */ /* * Relocatable module header for boot32. */ #include rmbase: b rmstart /* Start code */ .word 0 /* Initialisation code */ .word 0 /* Finalisation code */ .word 0 /* Service call handler */ .word rmtitle - rmbase /* Title string */ .word rmhelp - rmbase /* Help string */ .word rmcmdtbl - rmbase /* Help and command keyword table */ .word 0 /* SWI chunk base number */ .word 0 /* SWI handler code offset */ .word 0 /* SWI decoding table offset */ .word 0 /* SWI decoding code offset */ .word 0 /* Messages filename offset */ .word flags - rmbase /* Module flags extension offset */ rmtitle: .asciz "boot32" .align flags: .word 1 /* 32 bit compatible */ rmstart: /* * This entry point is called when we're started up as an application, * so we're allowed to use application workspace. This is good, * because most of our code is linked to run at 0x8000. */ mov r0, #0x8000 adr r1, rmbase ldr r2, Lsize Lcopyloop: ldr r3, [r1], #4 str r3, [r0], #4 subs r2, r2, #4 bgt Lcopyloop mov r0, #0x8000 mov r1, #128*1024 LDsync_loop: ldrb r3, [r0], #1 subs r1, r1, #1 bgt LDsync_loop ldr r0, Lstart mov pc, r0 /* * The size of the code/data to be moved is not `end - rmbase' but * `__bss_start__ - rmbase' for the module is loaded into RISC OS * based on the filesize where as NetBSD doesn't have to include all * the bss space into the file itself. In some odd cases the * relocatable module area can be smaller than the module + bss and * thus bomb out. */ Lsize: .word __bss_start__ - rmbase Lstart: .word _start rmcmdtbl: .asciz "boot32" /* Command text */ .align .word rmcmd_boot32 - rmbase /* Command code */ .byte 0x00 /* Min 0 parameters */ .byte 0x00 /* No GSTransed parameters */ .byte 0xff /* Max 255 parameters */ .byte 0x00 /* Normal command */ .word 0 /* No syntax message */ .word 0 /* No help message */ rmcmd_boot32: /* We're called with r0 -> command tail. */ stmfd r13!, {r14} mov r2, r0 mov r0, #2 adr r1, rmtitle swi XOS_Module ldmfd r13!, {pc}