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cleanup

This commit is contained in:
dhewg 2009-04-13 20:22:32 +02:00 committed by bushing
parent 39710e1b0d
commit 1d03b15fce
4 changed files with 15 additions and 151 deletions
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1
elf.h
View File

@ -63,3 +63,4 @@ typedef struct {
#define PT_PHDR 6
#endif

34
gecko.c
View File

@ -33,18 +33,6 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
static u8 gecko_console_enabled = 0;
// These two don't really seem to be needed
// Maybe only for boot buffer or some PPC stuff
static inline void _gecko_get(void)
{
//set32(HW_EXICTRL, 1);
}
static inline void _gecko_release(void)
{
//clear32(HW_EXICTRL, 1);
}
static u32 _gecko_command(u32 command)
{
u32 i;
@ -110,26 +98,24 @@ static int gecko_isalive(void)
return 0;
}
#if 0
static void gecko_flush(void)
{
char tmp;
u8 tmp;
while(_gecko_recvbyte(&tmp));
}
#if 0
static int gecko_recvbuffer(void *buffer, u32 size)
{
u32 left = size;
char *ptr = (char*)buffer;
_gecko_get();
while(left>0) {
if(!_gecko_recvbyte(ptr))
break;
ptr++;
left--;
}
_gecko_release();
return (size - left);
}
#endif
@ -139,14 +125,12 @@ static int gecko_sendbuffer(const void *buffer, u32 size)
u32 left = size;
char *ptr = (char*)buffer;
_gecko_get();
while(left>0) {
if(!_gecko_sendbyte(*ptr))
break;
ptr++;
left--;
}
_gecko_release();
return (size - left);
}
@ -156,7 +140,6 @@ static int gecko_recvbuffer_safe(void *buffer, u32 size)
u32 left = size;
char *ptr = (char*)buffer;
_gecko_get();
while(left>0) {
if(_gecko_checkrecv()) {
if(!_gecko_recvbyte(ptr))
@ -165,7 +148,6 @@ static int gecko_recvbuffer_safe(void *buffer, u32 size)
left--;
}
}
_gecko_release();
return (size - left);
}
@ -177,7 +159,6 @@ static int gecko_sendbuffer_safe(const void *buffer, u32 size)
if((read32(HW_EXICTRL) & EXICTRL_ENABLE_EXI) == 0)
return left;
_gecko_get();
while(left>0) {
if(_gecko_checksend()) {
if(!_gecko_sendbyte(*ptr))
@ -186,7 +167,6 @@ static int gecko_sendbuffer_safe(const void *buffer, u32 size)
left--;
}
}
_gecko_release();
return (size - left);
}
#endif
@ -203,6 +183,7 @@ void gecko_init(void)
if (!gecko_isalive())
return;
gecko_flush();
gecko_console_enabled = 1;
}
@ -309,7 +290,9 @@ void gecko_timer(void) {
_gecko_state = GECKO_STATE_RECEIVE_BUFFER;
_gecko_receive_left = _gecko_receive_len;
// sorry pal, that memory is mine now
powerpc_hang();
gecko_printf("MINI/GECKO: PPC halted, receiving data...\n");
}
return;
@ -329,7 +312,7 @@ void gecko_timer(void) {
return;
default:
gecko_printf("GECKOTIMER: statelolwtf?\n");
gecko_printf("MINI/GECKO: internal error\n");
return;
}
@ -337,7 +320,8 @@ void gecko_timer(void) {
switch (_gecko_cmd) {
case 0x43524150:
if (powerpc_boot_mem((u8 *) 0x10100000, _gecko_receive_len))
gecko_printf("GECKOTIMER: elflolwtf?\n");
gecko_printf("MINI/GECKO: the received binary is not a valid "
"PPC ELF. Broadway is dead now.\n");
break;
case 0x5a4f4d47:
@ -347,6 +331,8 @@ void gecko_timer(void) {
}
cleanup:
gecko_flush();
irq_set_alarm(20, 0);
_gecko_cmd = 0;

124
main.c
View File

@ -27,7 +27,6 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "sdhcvar.h"
#include "string.h"
#include "memory.h"
#include "elf.h"
#include "gecko.h"
#include "ff.h"
#include "panic.h"
@ -39,133 +38,10 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "nand.h"
#include "boot2.h"
typedef struct {
u32 hdrsize;
u32 loadersize;
u32 elfsize;
u32 argument;
} ioshdr;
u32 match[] = {
0xF7FFFFB8,
0xBC024708,
1,
2,
};
static inline void mem1_poke(u8 *dst, u8 bv)
{
u32 *p = (u32*)(((u32)dst) & ~3);
u32 val = *p;
switch(((u32)dst) & 3) {
case 0:
val = (val & 0x00FFFFFF) | bv << 24;
break;
case 1:
val = (val & 0xFF00FFFF) | bv << 16;
break;
case 2:
val = (val & 0xFFFF00FF) | bv << 8;
break;
case 3:
val = (val & 0xFFFFFF00) | bv;
break;
}
*p = val;
}
void *memcpy_mem1(void *dst, const void *src, size_t n)
{
unsigned char *p;
const unsigned char *q;
for (p = dst, q = src; n; n--) {
mem1_poke(p++, *q++);
}
return dst;
}
static void patch_mem(u8 *offset, u32 size, u64 titleID)
{
while(size>sizeof(match)) {
if(!memcmp(offset, match, sizeof(match))) {
gecko_printf("--> Patching @ %p\n", offset+8);
gecko_printf("--> To TitleID %08x%08x\n", (u32)(titleID>>32), (u32)titleID);
memcpy_mem1(offset+8, &titleID, sizeof(u64));
return;
}
offset++;
size -= 1;
}
}
void boot2_patchelf(u8 *elf, u64 titleID) {
gecko_printf("Patching boot2 ELF...\n");
if(memcmp("\x7F" "ELF\x01\x02\x01\x61\x01",elf,9)) {
gecko_printf("Invalid ELF header! 0x%02x 0x%02x 0x%02x 0x%02x\n",elf[0], elf[1], elf[2], elf[3]);
return;
}
Elf32_Ehdr *ehdr = (Elf32_Ehdr*)elf;
if(ehdr->e_phoff == 0) {
gecko_printf("ELF has no program headers!\n");
return;
}
int count = ehdr->e_phnum;
Elf32_Phdr *phdr = (Elf32_Phdr*)(elf + ehdr->e_phoff);
gecko_printf("PHDRS at %p\n",phdr);
while(count--)
{
if(phdr->p_type != PT_LOAD) {
gecko_printf("Skipping PHDR of type %d\n",phdr->p_type);
} else {
void *src = elf + phdr->p_offset;
gecko_printf("PATCH %p -> %p/%p [0x%x]\n",src, phdr->p_paddr, phdr->p_vaddr, phdr->p_filesz);
if(phdr->p_vaddr == (void*)0x20100000) {
gecko_printf("-> Found ES code PHDR\n");
patch_mem(src, phdr->p_filesz, titleID);
}
}
phdr++;
}
gecko_printf("Done!\n");
}
#define PPC_BOOT_FILE "/system/ppcboot.elf"
FATFS fatfs;
void *patch_boot2(void *base, u64 titleID)
{
ioshdr *hdr = (ioshdr*)base;
ioshdr *parhdr = (ioshdr*)hdr->argument;
u8 *elf;
gecko_printf("Patching BOOT2 for leet hax\n");
gecko_printf("Parent BOOT2 header (@%p):\n",parhdr);
gecko_printf(" Header size: %08x\n", parhdr->hdrsize);
gecko_printf(" Loader size: %08x\n", parhdr->loadersize);
gecko_printf(" ELF size: %08x\n", parhdr->elfsize);
gecko_printf(" Argument: %08x\n", parhdr->argument);
elf = (u8*) parhdr;
elf += parhdr->hdrsize + parhdr->loadersize;
gecko_printf("ELF at %p\n",elf);
boot2_patchelf(elf, titleID);
parhdr->argument = 0x42;
gecko_printf("Vector: %p\n", (void*)(((u32)parhdr) + parhdr->hdrsize));
return (void*)(((u32)parhdr) + parhdr->hdrsize);
}
u32 _main(void *base)
{
FRESULT fres;

7
powerpc_elf.c
View File

@ -35,13 +35,13 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
static Elf32_Ehdr elfhdr;
static Elf32_Phdr phdrs[PHDR_MAX];
static FIL fd;
int powerpc_boot_file(const char *path)
{
u32 read;
FIL fd;
FRESULT fres;
gecko_printf("%s: %08x\n", __FUNCTION__, read32(HW_TIMER));
fres = f_open(&fd, path, FA_READ);
if(fres != FR_OK)
return -fres;
@ -133,7 +133,7 @@ int powerpc_boot_mem(const u8 *addr, u32 len)
if (ehdr->e_phnum > PHDR_MAX) {
gecko_printf("ELF has too many (%d) program headers!\n",
elfhdr.e_phnum);
ehdr->e_phnum);
return -102;
}
@ -169,3 +169,4 @@ int powerpc_boot_mem(const u8 *addr, u32 len)
return 0;
}