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Cyril Lugan
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prex-0.9.0
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‎Makefile

+20
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PATH := $(DEVKITARM)/bin:$(PATH)
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GAME_TITLE := PrexDS
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GAME_SUBTITLE1 := cyril.lugan.info
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GAME_SUBTITLE2 := www.devkitpro.org
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GAME_ICON := $(DEVKITPRO)/libnds/icon.bmp
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all : prex.nds
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prex.nds : prex.arm9
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ndstool -c $@ -9 prex.arm9 -b $(GAME_ICON) "$(GAME_TITLE);$(GAME_SUBTITLE1);$(GAME_SUBTITLE2)"
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.PHONY : prex.arm9 clean
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prex.arm9 :
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@$(MAKE) --file=prex.mk prex.arm9
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clean :
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@$(MAKE) --file=prex.mk clean

‎bsp/boot/arm/arch/Makefile.inc

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SRCS+= arm/arch/elf_reloc.c

‎bsp/boot/arm/arch/boot.ld

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/*
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* Linker script for boot loader
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*/
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INCLUDE config.ld
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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SECTIONS {
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. = CONFIG_LOADER_TEXT ;
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.text . : {
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*(.text)
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}
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. = ALIGN(4);
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.rodata . : {
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*(.rodata)
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*(.rodata.*)
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}
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. = ALIGN(4);
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.data . : {
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*(.data)
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}
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. = ALIGN(4);
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.bss . : {
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*(.bss)
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*(COMMON)
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}
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. = CONFIG_LOADER_TEXT + 0x1fff;
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.tail : {
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*(.tail)
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}
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}

‎bsp/boot/arm/arch/elf_reloc.c

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/*-
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* Copyright (c) 2006, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/elf.h>
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#include <boot.h>
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int
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relocate_rel(Elf32_Rel *rel, Elf32_Addr sym_val, char *target_sect)
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{
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Elf32_Addr *where, tmp;
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Elf32_Sword addend;
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where = (Elf32_Addr *)(target_sect + rel->r_offset);
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switch (ELF32_R_TYPE(rel->r_info)) {
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case R_ARM_NONE:
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break;
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case R_ARM_ABS32:
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*where += (vaddr_t)ptokv(sym_val);
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ELFDBG(("R_ARM_ABS32: %lx -> %lx\n",
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(long)where, (long)*where));
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break;
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case R_ARM_PC24:
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case R_ARM_PLT32:
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case R_ARM_CALL:
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case R_ARM_JUMP24:
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addend = (Elf32_Sword)(*where & 0x00ffffff);
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if (addend & 0x00800000)
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addend |= 0xff000000;
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tmp = sym_val - (Elf32_Addr)where + (addend << 2);
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tmp >>= 2;
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*where = (*where & 0xff000000) | (tmp & 0x00ffffff);
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ELFDBG(("R_ARM_PC24: %lx -> %lx\n",
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(long)where, (long)*where));
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break;
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default:
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ELFDBG(("Unkown relocation type=%d\n",
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ELF32_R_TYPE(rel->r_info)));
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panic("relocation fail");
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return -1;
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}
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return 0;
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}
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int
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relocate_rela(Elf32_Rela *rela, Elf32_Addr sym_val, char *target_sec)
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{
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panic("invalid relocation type");
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return -1;
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}

‎bsp/boot/arm/arch/head.S

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/*-
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* Copyright (c) 2008, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
12+
* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* head.S - generic header code for ARM platforms.
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*/
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#include <conf/config.h>
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#include <machine/memory.h>
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#include <machine/syspage.h>
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#define ENTRY(x) .global x; .align; x##:
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.section ".text","ax"
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.code 32
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/*
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* Loader entry point
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*/
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ENTRY(boot_entry)
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b start_vector
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.align
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.code 32
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stack_end: .word (BOOTSTKTOP - KERNBASE)
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start_vector:
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mov r0, #0xd3 /* Enter SVC mode, Disable IRQ,FIQ */
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msr cpsr_c, r0
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ldr sp, stack_end
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adr r0, thumb_mode + 1
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bx r0
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.code 16
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thumb_mode:
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ldr r0, =main
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bx r0 /* Change to ARM mode */
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.section .tail,"ax"
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dummy:
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.byte 0xff
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.end

‎bsp/boot/arm/gba/Makefile.inc

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SRCS:= arm/gba/head.S \
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arm/gba/startup.c \
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arm/gba/debug.c
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‎bsp/boot/arm/gba/debug.c

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/*-
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* Copyright (c) 2005-2009, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
7+
* are met:
8+
* 1. Redistributions of source code must retain the above copyright
9+
* notice, this list of conditions and the following disclaimer.
10+
* 2. Redistributions in binary form must reproduce the above copyright
11+
* notice, this list of conditions and the following disclaimer in the
12+
* documentation and/or other materials provided with the distribution.
13+
* 3. Neither the name of the author nor the names of any co-contributors
14+
* may be used to endorse or promote products derived from this software
15+
* without specific prior written permission.
16+
*
17+
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18+
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19+
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20+
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21+
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22+
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23+
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24+
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25+
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27+
* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <boot.h>
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#if defined(DEBUG) && defined(CONFIG_DIAG_VBA)
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extern void vba_putc(int);
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#endif
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/*
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* Print one chracter
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*/
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void
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debug_putc(int c)
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{
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#if defined(DEBUG) && defined(CONFIG_DIAG_VBA)
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vba_putc(c);
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#endif
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}
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/*
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* Initialize debug port.
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*/
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void
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debug_init(void)
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{
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/* DO NOTHING */
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}
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