Load PRX from Eboot

[homemister]

Hi all,
I am trying to include prx files into my eboot using bin/o and then load them into kernel memory when they are needed.

i use this function to store the prx file in the eboot.

syslib.o : syslib.prx
bin2o -i syslib.prx syslib.o syslib

But how do i load if from the memory?
Regards
Homemister

[sakya]

Hi! :)

I never used bin2o, but if it works like bin2c it should declare a variable named as the label parameter:

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static unsigned char label[] __attribute__((aligned(16)))

Ciaooo
Sakya

[homemister]

how do you do bin2c?

[sakya]

Hi! :)

how do you do bin2c?

Almost the same way you used bin2o: :)

Code: Select all

bin2c syslib.prx syslib.h syslib

And you get a header file with the declaration of

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static unsigned char syslib[] __attribute__((aligned(16))) = {
....
};

Ciaooo
Sakya

[homemister]

how do i then load it into the kernal memory?
Sorry for all of the trouble, but i have never done this before.

[sakya]

Hi! :)

how do i then load it into the kernal memory?
Sorry for all of the trouble, but i have never done this before.

Sorry, I don't know if it is possible to load a prx from memory and not from ms/flash.
If there's no way to do this I think you can at last save the data to a file and then load it. ;)

EDIT: Try to have a look to this function:

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/**
 * Load a module from a buffer using the USB/WLAN API.
 *
 * Can only be called from kernel mode, or from a thread that has attributes of 0xa0000000.
 *
 * @param bufsize - Size (in bytes) of the buffer pointed to by buf.
 * @param buf - Pointer to a buffer containing the module to load.  The buffer must reside at an
 *              address that is a multiple to 64 bytes.
 * @param flags - Unused, always 0.
 * @param option - Pointer to an optional ::SceKernelLMOption structure.
 *
 * @returns The UID of the loaded module on success, otherwise one of ::PspKernelErrorCodes.
 */
SceUID sceKernelLoadModuleBufferUsbWlan(SceSize bufsize, void *buf, int flags, SceKernelLMOption *option);

But if this function works only in kernel mode you'll need a kernel prx to use it...so the problem isn't solved. :)

Ciaooo
Sakya

[Torch]

You can write the bin2o variable to a temporary file in ms0:/ and load it normally, then delete it.
Thats what IRShell does to continue running in the background after launching a game.

[homemister]

sorry for this question. But i am still learing about bin2c and bin2o.

How would i write the bin2o file to the memory stick?

[Torch]

In your program, in the global area, declare the following

extern unsigned char syslib_start[];
extern u32 syslib_size[];

Then you can write it to a file using sceIoWrite(fp, syslib_start, syslib_size);

[homemister]

Thx verry much Torch.

[Mashphealh]

You also can use this :

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int LoadStartModuleBuffer(void *buffer, int size, int a2)
{
    SceUID v0 = vshKernelLoadModuleBufferVSH&#40;size, buffer, 0, 0&#41; < 0&#41; return -1;
    if&#40;v0 < 0&#41;
           return -1;
           
    if&#40;a2 == 0&#41;
          return sceKernelStartModule&#40;v0, 0, 0, 0, 0&#41;;
          
    return 0;
&#125;

In my SDK, the function vshKernelLoad... hasn't been defined, so you can use a paralel function found at pspmodulemgr_kernel.h , his name is sceKernelLoadModuleBuffer.

Personally, I didn't test it function, and I don't know if that function will work in vsh mode.

The usage of LoadStartModuleBuffer is easy, just write LoadStartModuleBuffer(buffer, sizeof(buffer), 0);