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added elfloader. it actually compiles now :)

This commit is contained in:
Sven Peter 2009-05-15 15:06:32 +02:00
parent dfd2ba8069
commit 7b76dbc953
16 changed files with 813 additions and 2 deletions
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1
.gitignore vendored
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@ -3,3 +3,4 @@ git_version.h
*.bin
*.elf
*.map
*~

8
Makefile
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@ -5,8 +5,8 @@ CFLAGS += -DCAN_HAZ_IRQ -DCAN_HAZ_IPC
LDSCRIPT = mini.ld
LIBS = -lgcc
ELFLOADER = ../elfloader/elfloader.bin
MAKEBIN = python ../makebin.py
ELFLOADER = elfloader/elfloader.bin
MAKEBIN = python makebin.py
TARGET = armboot.elf
TARGET_BIN = armboot.bin
@ -34,6 +34,10 @@ git_version.h:
clean: myclean
$(ELFLOADER):
make -C elfloader
myclean:
-rm -f $(TARGET_BIN) git_version.h
$(MAKE) -C elfloader clean

6
elfloader/.gitignore vendored Normal file
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@ -0,0 +1,6 @@
*.d
*.bin
*.elf
*.o
*.map

23
elfloader/Makefile Normal file
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@ -0,0 +1,23 @@
include ../starlet.mk
CFLAGS += -fpic
LDSCRIPT = stub.ld
LIBS = -lgcc
TARGET = elfloader.elf
TARGET_BIN = elfloader.bin
OBJS = start.o stub.o string.o utils.o
include ../common.mk
all: $(TARGET_BIN)
$(TARGET_BIN): $(TARGET)
@echo " OBJCPY $@"
@$(OBJCOPY) -O binary $< $@
clean: myclean
myclean:
-rm -f $(TARGET_BIN)

66
elfloader/elf.h Normal file
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@ -0,0 +1,66 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: ELF structures
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ELF_H__
#define __ELF_H__
#include "types.h"
#define EI_NIDENT 16
typedef struct {
unsigned char e_ident[EI_NIDENT];
u16 e_type;
u16 e_machine;
u32 e_version;
void *e_entry;
u32 e_phoff;
u32 e_shoff;
u32 e_flags;
u16 e_ehsize;
u16 e_phentsize;
u16 e_phnum;
u16 e_shentsize;
u16 e_shnum;
u16 e_shtrndx;
} Elf32_Ehdr;
typedef struct {
u32 p_type;
u32 p_offset;
void *p_vaddr;
void *p_paddr;
u32 p_filesz;
u32 p_memsz;
u32 p_flags;
u32 p_align;
} Elf32_Phdr;
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#endif

31
elfloader/hollywood.h Normal file
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@ -0,0 +1,31 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: Hollywood register definitions
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __HOLLYWOOD_H__
#define __HOLLYWOOD_H__
#define HW_REG_BASE 0xd800000
#define HW_TIMER (HW_REG_BASE + 0x010)
#define HW_MEMMIRR (HW_REG_BASE + 0x060)
#define HW_BOOT0 (HW_REG_BASE + 0x18c)
#endif

113
elfloader/start.S Normal file
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@ -0,0 +1,113 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: system startup
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
.arm
.extern _main
.extern __got_start
.extern __got_end
.extern __bss_start
.extern __bss_end
.extern __stack_addr
.extern delay
.globl _start
.globl debug_output
.section .init
_start:
@ Get real address of _start
sub r4, pc, #8
@ Subtract offset to get the address that we were loaded at
ldr r0, =_start
sub r4, r4, r0
@ Output 0x42 to the debug port
mov r0, #0x42
bl debug_output
@ Set up a stack
ldr sp, =__stack_addr
add sp, r4
@ Output 0x43 to the debug port
mov r0, #0x43
bl debug_output
@ relocate the GOT entries
ldr r1, =__got_start
add r1, r4
ldr r2, =__got_end
add r2, r4
got_loop:
@ check for the end
cmp r1, r2
beq done_got
@ read the GOT entry
ldr r3, [r1]
@ add our base address
add r3, r4
str r3, [r1]
@ move on
add r1, r1, #4
b got_loop
done_got:
@ clear BSS
ldr r1, =__bss_start
add r1, r4
ldr r2, =__bss_end
add r2, r4
mov r3, #0
bss_loop:
@ check for the end
cmp r1, r2
beq done_bss
@ clear the word and move on
str r3, [r1]
add r1, r1, #4
b bss_loop
done_bss:
mov r0, #0x44
bl debug_output
@ take the plunge
mov r0, r4
bl _main
@ _main returned! Go to whatever address it returned...
mov r1, r0
mov r0, r4
mov pc, r1
.pool
debug_output:
@ load address of port
mov r3, #0xd800000
@ load old value
ldr r2, [r3, #0xe0]
@ clear debug byte
bic r2, r2, #0xFF0000
@ insert new value
and r0, r0, #0xFF
orr r2, r2, r0, LSL #16
@ store back
str r2, [r3, #0xe0]
mov pc, lr

30
elfloader/start.h Normal file
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@ -0,0 +1,30 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: system startup
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __START_H__
#define __START_H__
#include "types.h"
void debug_output(u8 byte);
#endif

1
elfloader/string.c Symbolic link
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@ -0,0 +1 @@
../string.c

1
elfloader/string.h Symbolic link
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@ -0,0 +1 @@
../string.h

86
elfloader/stub.c Normal file
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@ -0,0 +1,86 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "types.h"
#include "utils.h"
#include "start.h"
#include "hollywood.h"
#include "string.h"
#include "elf.h"
typedef struct {
u32 hdrsize;
u32 loadersize;
u32 elfsize;
u32 argument;
} ioshdr;
void *loadelf(const u8 *elf) {
if(memcmp("\x7F" "ELF\x01\x02\x01",elf,7)) {
panic(0xE3);
}
Elf32_Ehdr *ehdr = (Elf32_Ehdr*)elf;
if(ehdr->e_phoff == 0) {
panic(0xE4);
}
int count = ehdr->e_phnum;
Elf32_Phdr *phdr = (Elf32_Phdr*)(elf + ehdr->e_phoff);
while(count--)
{
if(phdr->p_type == PT_LOAD) {
const void *src = elf + phdr->p_offset;
memcpy(phdr->p_paddr, src, phdr->p_filesz);
}
phdr++;
}
return ehdr->e_entry;
}
static inline void disable_boot0()
{
set32(HW_BOOT0, 0x1000);
}
static inline void mem_setswap()
{
set32(HW_MEMMIRR, 0x20);
}
void *_main(void *base)
{
ioshdr *hdr = (ioshdr*)base;
u8 *elf;
void *entry;
elf = (u8*) base;
elf += hdr->hdrsize + hdr->loadersize;
debug_output(0xF1);
mem_setswap(1);
disable_boot0(1);
entry = loadelf(elf);
debug_output(0xC1);
return entry;
}

117
elfloader/stub.ld Normal file
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@ -0,0 +1,117 @@
/*
elfloader - a Free Software replacement for the Nintendo/BroadOn IOS.
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
OUTPUT_FORMAT("elf32-bigarm")
OUTPUT_ARCH(arm)
EXTERN(_start)
ENTRY(_start)
__base_addr = 0;
SECTIONS
{
. = __base_addr;
.header :
{
__header = .;
/* Entry point (offset) */
LONG(__code_start);
/* Loader size */
LONG(__loader_size);
/* ELF size */
LONG(0);
/* Boot argument? */
LONG(0);
. = ALIGN(16);
}
__code_start = .;
.init :
{
*(.init)
. = ALIGN(4);
}
.got :
{
__got_start = .;
*(.got.*)
*(.got)
. = ALIGN(4);
__got_end = . ;
}
.text :
{
*(.text.*)
*(.gnu.warning)
*(.gnu.linkonce.t*)
*(.glue_7)
*(.glue_7t)
. = ALIGN(4);
}
__text_end = . ;
.rodata :
{
*(.rodata)
*all.rodata*(*)
*(.roda)
*(.rodata.*)
*(.gnu.linkonce.r*)
. = ALIGN(4);
}
.data :
{
*(.data)
*(.data.*)
*(.gnu.linkonce.d*)
. = ALIGN(4);
}
.bss :
{
__bss_start = . ;
*(.dynbss)
*(.gnu.linkonce.b*)
*(.bss*)
*(.sbss*)
*(COMMON)
. = ALIGN(32);
__bss_end = . ;
}
}
__stack_end = (__bss_end);
__stack_addr = (__bss_end + 0x100);
__end = __stack_addr ;
__loader_size = __end - __code_start;
PROVIDE (__stack_end = __stack_end);
PROVIDE (__stack_addr = __stack_addr);
PROVIDE (__got_start = __got_start);
PROVIDE (__got_end = __got_end);
PROVIDE (__bss_start = __bss_start);
PROVIDE (__bss_end = __bss_end);

50
elfloader/types.h Normal file
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@ -0,0 +1,50 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: types
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __TYPES_H__
#define __TYPES_H__
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned long long u64;
typedef signed char s8;
typedef signed short s16;
typedef signed int s32;
typedef signed long long s64;
typedef volatile unsigned char vu8;
typedef volatile unsigned short vu16;
typedef volatile unsigned int vu32;
typedef volatile unsigned long long vu64;
typedef volatile signed char vs8;
typedef volatile signed short vs16;
typedef volatile signed int vs32;
typedef volatile signed long long vs64;
typedef s32 size_t;
#define NULL ((void *)0)
#endif

45
elfloader/utils.c Normal file
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@ -0,0 +1,45 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: random utilities
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "types.h"
#include "utils.h"
#include "hollywood.h"
#include "start.h"
void udelay(u32 d)
{
// should be good to max .2% error
u32 ticks = d * 19 / 10;
write32(HW_TIMER, 0);
while(read32(HW_TIMER) < ticks);
}
void panic(u8 v)
{
while(1) {
debug_output(v);
udelay(500000);
debug_output(0);
udelay(500000);
}
}

188
elfloader/utils.h Normal file
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@ -0,0 +1,188 @@
/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
ELF loader: random utilities
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
This program 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, version 2.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __UTILS_H__
#define __UTILS_H__
static inline u32 read32(u32 addr)
{
u32 data;
__asm__ volatile ("ldr\t%0, [%1]" : "=r" (data) : "r" (addr));
return data;
}
static inline void write32(u32 addr, u32 data)
{
__asm__ volatile ("str\t%0, [%1]" : : "r" (data), "r" (addr));
}
static inline u32 set32(u32 addr, u32 set)
{
u32 data;
__asm__ volatile (
"ldr\t%0, [%1]\n"
"\torr\t%0, %2\n"
"\tstr\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set)
);
return data;
}
static inline u32 clear32(u32 addr, u32 clear)
{
u32 data;
__asm__ volatile (
"ldr\t%0, [%1]\n"
"\tbic\t%0, %2\n"
"\tstr\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (clear)
);
return data;
}
static inline u32 mask32(u32 addr, u32 clear, u32 set)
{
u32 data;
__asm__ volatile (
"ldr\t%0, [%1]\n"
"\tbic\t%0, %3\n"
"\torr\t%0, %2\n"
"\tstr\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set), "r" (clear)
);
return data;
}
static inline u16 read16(u32 addr)
{
u32 data;
__asm__ volatile ("ldrh\t%0, [%1]" : "=r" (data) : "r" (addr));
return data;
}
static inline void write16(u32 addr, u16 data)
{
__asm__ volatile ("strh\t%0, [%1]" : : "r" (data), "r" (addr));
}
static inline u16 set16(u32 addr, u16 set)
{
u16 data;
__asm__ volatile (
"ldrh\t%0, [%1]\n"
"\torr\t%0, %2\n"
"\tstrh\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set)
);
return data;
}
static inline u16 clear16(u32 addr, u16 clear)
{
u16 data;
__asm__ volatile (
"ldrh\t%0, [%1]\n"
"\tbic\t%0, %2\n"
"\tstrh\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (clear)
);
return data;
}
static inline u16 mask16(u32 addr, u16 clear, u16 set)
{
u16 data;
__asm__ volatile (
"ldrh\t%0, [%1]\n"
"\tbic\t%0, %3\n"
"\torr\t%0, %2\n"
"\tstrh\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set), "r" (clear)
);
return data;
}
static inline u8 read8(u32 addr)
{
u32 data;
__asm__ volatile ("ldrb\t%0, [%1]" : "=r" (data) : "r" (addr));
return data;
}
static inline void write8(u32 addr, u8 data)
{
__asm__ volatile ("strb\t%0, [%1]" : : "r" (data), "r" (addr));
}
static inline u8 set8(u32 addr, u8 set)
{
u8 data;
__asm__ volatile (
"ldrb\t%0, [%1]\n"
"\torr\t%0, %2\n"
"\tstrb\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set)
);
return data;
}
static inline u8 clear8(u32 addr, u8 clear)
{
u8 data;
__asm__ volatile (
"ldrb\t%0, [%1]\n"
"\tbic\t%0, %2\n"
"\tstrb\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (clear)
);
return data;
}
static inline u8 mask8(u32 addr, u8 clear, u8 set)
{
u8 data;
__asm__ volatile (
"ldrb\t%0, [%1]\n"
"\tbic\t%0, %3\n"
"\torr\t%0, %2\n"
"\tstrb\t%0, [%1]"
: "=&r" (data)
: "r" (addr), "r" (set), "r" (clear)
);
return data;
}
void udelay(u32 d);
void panic(u8 v);
#endif

49
makebin.py Normal file
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#!/bin/env python
import sys, os, struct, sha
loaderfile = sys.argv[1]
elffile = sys.argv[2]
outfile = sys.argv[3]
data = open(loaderfile,"rb").read()
hdrlen, loaderlen, elflen, arg = struct.unpack(">IIII",data[:16])
if hdrlen < 0x10:
print "ERROR: header length is 0x%x, expected at least 0x10"%hdrlen
sys.exit(1)
loaderoff = hdrlen
elfoff = loaderoff + loaderlen
elfend = elfoff + elflen
hdr = data[:hdrlen]
loader = data[loaderoff:elfoff]
elf = open(elffile,"rb").read()
if elflen > 0:
print "WARNING: loader already contains ELF, will replace"
elflen = len(elf)
if loaderlen < len(loader):
print "ERROR: loader is larger than its reported length"
sys.exit(1)
if loaderlen > len(loader):
print "Padding loader with 0x%x zeroes"%(loaderlen-len(loader))
loader += "\x00"*(loaderlen-len(loader))
newdata = struct.pack(">IIII", hdrlen, loaderlen, elflen, 0) + hdr[16:]
newdata += loader
newdata += elf
print "Header: 0x%x bytes"%(hdrlen)
print "Loader: 0x%x bytes"%(loaderlen)
print "ELF: 0x%x bytes"%(elflen)
f = open(outfile,"wb")
f.write(newdata)
f.close()