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Ruj89
Joined: 12 Jun 2007
Posts: 12
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 Posted: Tue Jun 12, 2007 7:20 am Post subject: Trying to load an elf |
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I'm using this piece of code to load a 1.00 eboot
unpack-pbp.h
| Code: | // Dan Peori (peori@oopo.net)
// modded by Ruggero Russo (ruj89@crazynet.org)
// 0: no errors
//-1: infile errors
//-2: wrong infile format
//-3: memory allocation errors
//-4: outfile errors
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <string.h>
#include <stdlib.h>
#define printf pspDebugScreenPrintf
typedef struct { char signature[4]; int version; int offset[8]; } HEADER;
int extract_elf(char file_path[256]) {
HEADER header;
int total_size, size, infile, outfile;
void *buffer;
// Check the argument count.
if(file_path == "") { printf("USAGE: %s <filename>\n", file_path); return -1; }
// Open the input file.
if(!(infile = sceIoOpen(file_path, PSP_O_RDONLY, 0777))) { printf("ERROR: Could not open the input file. (%s)\n", file_path); return -1; }
// Get the input file size.
total_size = sceIoLseek(infile, 0, PSP_SEEK_END);
sceIoLseek(infile, 0, PSP_SEEK_SET);
if (total_size < 0) { printf("ERROR: Could not get the input file size.\n"); return -1; }
// Read in the input file header.
if (sceIoRead(infile, &header, sizeof(HEADER)) < 0) { printf("ERROR: Could not read the input file header.\n"); return -1; }
// Check the input file signature.
if (header.signature[0] != 0x00) { printf("ERROR: Input file is not a PBP file or it is kxploited.\n"); return -2; } else
if (header.signature[1] != 0x50) { printf("ERROR: Input file is not a PBP file or it is kxploited.\n"); return -2; } else
if (header.signature[2] != 0x42) { printf("ERROR: Input file is not a PBP file or it is kxploited.\n"); return -2; } else
if (header.signature[3] != 0x50) { printf("ERROR: Input file is not a PBP file or it is kxploited.\n"); return -2; }
// For data.psp section...
// Get the size of the section data.
size = header.offset[7] - header.offset[6];
// Allocate the section data buffer.
buffer = malloc(size);
if (buffer == NULL) { printf("ERROR: Could not allocate the section data buffer. (%d)\n", size); return -3; }
// Read in the section data.
if (sceIoRead(infile, buffer, size) < 0) { printf("ERROR: Could not read in the section data.\n"); return -1; }
// Open the output file.
if(!(outfile = sceIoOpen("ms0:/eboot.elf", PSP_O_WRONLY|PSP_O_CREAT, 0777))) { printf("ERROR: Could not open the output file. (eboot.elf)\n"); return -4; }
// Write out the section data.
if (sceIoWrite(outfile, buffer, size) < 0) { printf("ERROR: Could not write out the section data.\n"); return -4; }
// Close the output file.
if (sceIoClose(outfile) < 0) { printf("ERROR: Could not close the output file.\n"); return -4; }
// Free the section data buffer.
free(buffer);
// Output the section information.
printf("%8d bytes | eboot.elf\n", size);
// Close the input file.
if (sceIoClose(infile) < 0) { printf("ERROR: Could not close the input file.\n"); return -1; }
return 0;
}
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main.c
| Code: | #include <pspdebug.h>
#include <pspuser.h>
#include <string.h>
#include <pspsdk.h>
#include "unpack-pbp.h"
PSP_MODULE_INFO("ssaver",0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);
#define printf pspDebugScreenPrintf
int extract_elf(char file_path[256]);
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common)
{
sceKernelExitGame();
return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp)
{
int cbid;
cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
sceKernelRegisterExitCallback(cbid);
sceKernelSleepThreadCB();
return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void)
{
int thid = 0;
/* Note the use of THREAD_ATTR_USER to ensure the callback thread is in user mode */
thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, PSP_THREAD_ATTR_USER, NULL);
if(thid >= 0)
{
sceKernelStartThread(thid, 0, 0);
}
return thid;
}
int main(int argc, char **argv)
{
SceKernelLMOption option;
int status;
SceUID ssaver;
pspDebugScreenInit();
SetupCallbacks();
extract_elf("ms0:/eboot_mod.pbp");
memset(&option, 0, sizeof(option));
option.size = sizeof(option);
option.mpidtext = 2;
option.mpiddata = 2;
option.position = 0;
option.access = 1;
ssaver = sceKernelLoadModule("ms0:/eboot.elf",0,&option);
if(ssaver < 0) printf("Can't load the elf file");
else sceKernelStartModule(ssaver,0,NULL,&status,NULL);
sceKernelSleepThread();
return 0;
}
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Why does it show the error message "Can't load the elf file"? I tried to extract the elf using PSPBrew and to comment the extract_elf function, but it was the same...
Last edited by Ruj89 on Tue Jun 12, 2007 6:35 pm; edited 1 time in total |
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be2003
Joined: 20 Apr 2006
Posts: 144
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| Posted: Tue Jun 12, 2007 7:34 am Post subject: |
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my guess is that you cannot load and start an elf the same way you load and start a prx module
im pretty sure you can load a 1.00 eboot using sceKernelLoadExec
the prototype is in psploadexec.h
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dot_blank
Joined: 28 Sep 2005
Posts: 498
Location: Brasil
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| Posted: Tue Jun 12, 2007 10:46 am Post subject: |
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PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_USER);
use 0 for kmode thread
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be2003
Joined: 20 Apr 2006
Posts: 144
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| Posted: Tue Jun 12, 2007 11:02 am Post subject: |
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man, i constantly feel like an idiot
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dot_blank
Joined: 28 Sep 2005
Posts: 498
Location: Brasil
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| Posted: Tue Jun 12, 2007 11:58 am Post subject: |
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Pick your head up, cuz there are lots of people who would like to see you Fall :)
so don't get yourself down
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Ruj89
Joined: 12 Jun 2007
Posts: 12
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| Posted: Tue Jun 12, 2007 5:48 pm Post subject: |
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| dot_blank wrote: | PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_USER);
use 0 for kmode thread |
It's the same...
I use the cf 3.40 and i put my program in GAME150 folder. I also tried in GAME folder, setting it in 1.50 mode, but my program didn't work.
Is cf ok?
| be2003 wrote: | my guess is that you cannot load and start an elf the same way you load and start a prx module
im pretty sure you can load a 1.00 eboot using sceKernelLoadExec
the prototype is in psploadexec.h |
Oh, I know that sceKernelLoadExec can load an eboot, but, as irshell, I don't want to reboot the kernel when I start the homebrew. That's my target... |
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be2003
Joined: 20 Apr 2006
Posts: 144
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| Posted: Wed Jun 13, 2007 5:42 am Post subject: |
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why dont u try using some of the functions in the pspsdk utility library?
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Ruj89
Joined: 12 Jun 2007
Posts: 12
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| Posted: Wed Jun 13, 2007 6:19 am Post subject: |
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I used
| Code: |
ssaver = pspSdkLoadStartModule("ms0:/eboot.elf",PSP_MEMORY_PARTITION_KERNEL);
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And i got the same result.
That's 3 days i'm trying to mix functions, please help me! |
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be2003
Joined: 20 Apr 2006
Posts: 144
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| Posted: Wed Jun 13, 2007 7:30 am Post subject: |
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u did use all the patches in the pspsdk utility library right?
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dot_blank
Joined: 28 Sep 2005
Posts: 498
Location: Brasil
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| Posted: Wed Jun 13, 2007 8:02 am Post subject: |
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you want to add this function just before your defined printf
| Code: | __attribute__ ((constructor))
void loaderInit(){
pspKernelSetKernelPC();
pspSdkInstallNoDeviceCheckPatch();
pspSdkInstallNoPlainModuleCheckPatch();
pspSdkInstallKernelLoadModulePatch();
}
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Ruj89
Joined: 12 Jun 2007
Posts: 12
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| Posted: Wed Jun 13, 2007 6:57 pm Post subject: |
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These are the errors:
1) If I use the program normally, I have a SCE_KERNEL_ERROR_UNSUPPORTED_PRX_TYPE error
2) If I extract the data.psp using a PC program, there is another error:
SCE_KERNEL_ERROR_PARTITION_MISMATCH
3) If I change the partition to PSP_MEMORY_PARTITION_USER, this is the error:
SCE_KERNEL_ERROR_MEMBLOCK_ALLOC_FAILED
So I understand that my extract_elf function doesn't work, the elf should be loaded in an user partition, and I can't understand the third error.
Actually my main.c code is:
| Code: | #include <pspdebug.h>
#include <pspuser.h>
#include <string.h>
#include <pspsdk.h>
#include "unpack-pbp.h"
PSP_MODULE_INFO("SSAVER",0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);
__attribute__ ((constructor)) void loaderInit(){
pspKernelSetKernelPC();
pspSdkInstallNoDeviceCheckPatch();
pspSdkInstallNoPlainModuleCheckPatch();
pspSdkInstallKernelLoadModulePatch();
}
#define printf pspDebugScreenPrintf
int extract_elf(char file_path[256]);
/*(callbacks...)*/
int main(int argc, char **argv)
{
SceUID ssaver;
pspDebugScreenInit();
SetupCallbacks();
extract_elf("ms0:/eboot_mod.pbp");
ssaver = pspSdkLoadStartModule("ms0:/eboot.elf",PSP_MEMORY_PARTITION_KERNEL);
if(ssaver != 0) printf("ERROR: Can't load the elf file (0x%x)",ssaver);
sceKernelSleepThread();
return 0;
} |
How can I fix it? |
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