C/C++ Programming Help Thread

[Archaemic]

Where did you find that error? The only errors I know of start 0x8002...

Anyway, I changed the 2nd argument to just XMB.prx, but same error as before.

Errors that start with 0x8002 are sce errors, whereas errors that start with 0x8001 are libc errors. I just looked through sys/errno.h. Take away the 0x8001 and then convert to decimal, and you'll see a lot of defines there. Just match them up.

By the way, now that you have dev status, I think you can change the default color of your post in your cp so you don't have to do it with every post.

[Auraomega]

Odd, I don't appear to have that, which is a pain. Oh well, and its a matter of habit to still colour my font

But seriously, my code still isn't working and I'm just wondering if its because I'm trying to rename something in flash0? I could copy, the file and then delete the original, but that would be long winded, and its easy to run into problems I believe.

-Aura

[Archaemic]

You were probably looking in the wrong place for the color options. It's here: http://forums.qj.net/profile.php?do=editoptions near the bottom.

[Auraomega]

Sorry, I know about that, I mean I couldn't find the errno.h file, infact I don't appear to have the sys folder

-Aura
-= Double Post =-
Ignore that, I've actually found it, it wasn't with the includes in the libc folder as I assumed.

[Archaemic]

There are a mess of include folders. Specifically, it's /usr/local/pspdev/psp/include/sys/errno.h

[MrChaos]

Would anyone happen to know the maxium heigth (spelling?) and width possible for an .png image using Oslib?

[eldiablov]

512 x 512 i would say

[Auraomega]

Trying to load a module with my KMode stuff in, but I'm getting error 0x8002013B - SCE_KERNEL_ERROR_LIBRARY_ FOUND - what normally causes this error?

-Aura

[JustChris]

How do you set flags with preprocessor macros so that you can choose which version of the code you want to compile?

For example:

#ifdef PSP
// PSP-specific code here
#endif
#ifdef WIN32
// Windows specific code here
#endif

I could just use #define and replace it with either PSP or WIN32, but does that need to be set to a specific value, or does that not matter?

[coolguy5678]

The value doesn't matter. In fact, you don't even have to give it a value. You can just say "#define PSP", for example.

[Grimfate126]

i have a quick question. in OpenGL, is a negative z value mean youre moving into or backwards in the screen? my frustum culling may be screwing up cause of this..

[BigSanFrey]

i would think backwards...

[Auraomega]

Is it possible to load a module from a buffer in usermode?

-Aura

[JaSo PsP]

I am trying to read through the user memory and find out which addresses are equal to '140', then write the memory addresses to a file. This is within a PRX that is run during a game.

int main_thread(SceSize args, void *argp) 
{
    sceKernelDelayThread(3000000);
    SceUID fd;
    SceCtrlData pad;
    int i;
    int health = 140;
    int *address;
    
    while(1)
    {
        sceCtrlPeekBufferPositive(&pad, 1);
        
        if(pad.Buttons & PSP_CTRL_LTRIGGER)
        {
            if(pad.Buttons & PSP_CTRL_RTRIGGER)
            {
                break;
            }
        }
        sceDisplayWaitVblankStart();
    }
    
    fd = sceIoOpen("ms0:/output.txt", PSP_O_CREAT|PSP_O_WRONLY|PSP_O_TRUNC, 0777);
    
    for(i = 0x08800000; i <= 0x0A000000; i += 0x00000001)
    {
         address = (void*)i;
         if(*address == health)
         {
             sceIoWrite(fd, (int*)address, (SceSize)sizeof(int*));
         }
         sceDisplayWaitVblankStart();
    }
    
    sceIoClose(fd);
    
    sceKernelSleepThread();
    return 0;
}

I know there's something wrong because it freezes the game but what is the problem?

[charnold]

i have a quick question. in OpenGL, is a negative z value mean youre moving into or backwards in the screen? my frustum culling may be screwing up cause of this..

http://www.evl.uic.edu/ralph/508S98/coordinates.html

[Archaemic]

I am trying to read through the user memory and find out which addresses are equal to '140', then write the memory addresses to a file. This is within a PRX that is run during a game.

int main_thread(SceSize args, void *argp) 
{
    sceKernelDelayThread(3000000);
    SceUID fd;
    SceCtrlData pad;
    int i;
    int health = 140;
    int *address;
    
    while(1)
    {
        sceCtrlPeekBufferPositive(&pad, 1);
        
        if(pad.Buttons & PSP_CTRL_LTRIGGER)
        {
            if(pad.Buttons & PSP_CTRL_RTRIGGER)
            {
                break;
            }
        }
        sceDisplayWaitVblankStart();
    }
    
    fd = sceIoOpen("ms0:/output.txt", PSP_O_CREAT|PSP_O_WRONLY|PSP_O_TRUNC, 0777);
    
    for(i = 0x08800000; i <= 0x0A000000; i += 0x00000001)
    {
         address = (void*)i;
         if(*address == health)
         {
             sceIoWrite(fd, (int*)address, (SceSize)sizeof(int*));
         }
         sceDisplayWaitVblankStart();
    }
    
    sceIoClose(fd);
    
    sceKernelSleepThread();
    return 0;
}

I know there's something wrong because it freezes the game but what is the problem?

Bus error. Replace += 0x00000001 with += 0x00000004

[JaSo PsP]

still, it's not finding any memory locations that hold the value 140

[hallo007]

.set noreorder

#include "pspstub.s"

STUB_START "NandDumper",0x40090000,0 x00010005
STUB_FUNC 0x9EDD6EE1,readBlock
STUB_END

what's wrong with this?

psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o main.o main.cpp
psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o io.o io.cpp
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o NandDumper.o NandDumper.S
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150  -L. -L/usr/local/pspdev/psp/sdk/lib   main.o io.o NandDumper.o -lpsppower -lstdc++ -lpsprtc -lpspnand_driver -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -o powersample.elf
io.o: In function `dumpNand()':
io.cpp:(.text+0x1b8): undefined reference to `readBlock(unsigned long, unsigned char*)'

[the unique warrior]

.set noreorder

#include "pspstub.s"

STUB_START "NandDumper",0x40090000,0 x00010005
STUB_FUNC 0x9EDD6EE1,readBlock
STUB_END

what's wrong with this?

psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o main.o main.cpp
psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o io.o io.cpp
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o NandDumper.o NandDumper.S
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150  -L. -L/usr/local/pspdev/psp/sdk/lib   main.o io.o NandDumper.o -lpsppower -lstdc++ -lpsprtc -lpspnand_driver -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -o powersample.elf
io.o: In function `dumpNand()':
io.cpp:(.text+0x1b8): undefined reference to `readBlock(unsigned long, unsigned char*)'

Would you mind, uh making a .h header file for you function? :|

[hallo007]

I did that

#ifndef IO_H
#define IO_H
...

extern int readBlock(u32 page, u8 *buffer);

...
#endif

[Archaemic]

still, it's not finding any memory locations that hold the value 140

Are you sure it's stored as a word and not something shorter, like a halfword or byte?

Try putting it back to +=1 (or ++) and changing int* to char*

[JaSo PsP]

Are you sure it's stored as a word and not something shorter, like a halfword or byte?

Try putting it back to +=1 (or ++) and changing int* to char*

Hmm, so I could search for 4 chars at once to make an integer? I don't think the health in Coded Arms Contagion is going to be stored in 1 byte?

[placo23]

Hi, is somebody here using DSX to display stuff on the XMB?

I'm currently working on a plugin, and am finding that it's flickering a bit. Also, it's conflicting with some items on the XMB, such as video and browser.

Does anyone know how to fix that?

Cheers

[hallo007]

.set noreorder

#include "pspstub.s"

STUB_START "NandDumper",0x40090000,0 x00010005
STUB_FUNC 0x9EDD6EE1,readBlock
STUB_END

what's wrong with this?

psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o main.o main.cpp
psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o io.o io.cpp
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o NandDumper.o NandDumper.S
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150  -L. -L/usr/local/pspdev/psp/sdk/lib   main.o io.o NandDumper.o -lpsppower -lstdc++ -lpsprtc -lpspnand_driver -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -o powersample.elf
io.o: In function `dumpNand()':
io.cpp:(.text+0x1b8): undefined reference to `readBlock(unsigned long, unsigned char*)'

I am still stuck here:s

[Archaemic]

Hmm, so I could search for 4 chars at once to make an integer? I don't think the health in Coded Arms Contagion is going to be stored in 1 byte?

Well, try a halfword search then.

int main_thread(SceSize args, void *argp) 
{
    sceKernelDelayThread(3000000);
    SceUID fd;
    SceCtrlData pad;
    int i;
    u16 health = 140;
    u16 *address;
    
    while(1)
    {
        sceCtrlReadBufferPositive(&pad, 1);
        
        if(pad.Buttons & PSP_CTRL_LTRIGGER)
        {
            if(pad.Buttons & PSP_CTRL_RTRIGGER)
            {
                break;
            }
        }
    }
    
    fd = sceIoOpen("ms0:/output.txt", PSP_O_CREAT|PSP_O_WRONLY|PSP_O_TRUNC, 0777);
    
    for(i = 0x08800000; i < 0x0A000000; i += sizeof(health))
    {
         address = (u16*)i;
         if(*address == health)
         {
             sceIoWriteAsync(fd, i, (SceSize)sizeof(i));
         }
    }

    sceIoWaitAsync(fd, 0);
    sceIoClose(fd);
    
    sceKernelSleepThread();
    return 0;
}

(Notice the optimizations I made; it'll take forever if you are constantly waiting for VBlank--that is, it'll take 38 hours to search through all of your memory. Suboptimal. I also removed the = in the <= as that would still be causing a crash. Also, asynchronous writing will speed it up too. I don't know if this is how async works on the PSP, though)

[Team-3GO]

Hi, is somebody here using DSX to display stuff on the XMB?

I'm currently working on a plugin, and am finding that it's flickering a bit. Also, it's conflicting with some items on the XMB, such as video and browser.

Does anyone know how to fix that?

Cheers

using dsx and no flickering here.
and yeh in 3.52 the browser is broken while running a vsh dsx prx. on 3.71 it kills the video function here.

you could end your prx with 0 or unload the prx while loading the net modules. i just added a button press to end my dsx prx before using the browser. not the best way but it works fine for me.

[JaSo PsP]

Well, try a halfword search then.

int main_thread(SceSize args, void *argp) 
{
    sceKernelDelayThread(3000000);
    SceUID fd;
    SceCtrlData pad;
    int i;
    u16 health = 140;
    u16 *address;
    
    while(1)
    {
        sceCtrlReadBufferPositive(&pad, 1);
        
        if(pad.Buttons & PSP_CTRL_LTRIGGER)
        {
            if(pad.Buttons & PSP_CTRL_RTRIGGER)
            {
                break;
            }
        }
    }
    
    fd = sceIoOpen("ms0:/output.txt", PSP_O_CREAT|PSP_O_WRONLY|PSP_O_TRUNC, 0777);
    
    for(i = 0x08800000; i < 0x0A000000; i += sizeof(health))
    {
         address = (u16*)i;
         if(*address == health)
         {
             sceIoWriteAsync(fd, i, (SceSize)sizeof(i));
         }
    }

    sceIoWaitAsync(fd, 0);
    sceIoClose(fd);
    
    sceKernelSleepThread();
    return 0;
}

(Notice the optimizations I made; it'll take forever if you are constantly waiting for VBlank--that is, it'll take 38 hours to search through all of your memory. Suboptimal. I also removed the = in the <= as that would still be causing a crash. Also, asynchronous writing will speed it up too. I don't know if this is how async works on the PSP, though)

That totally crashes it as apposed to just not doing anything like before..

[Archaemic]

Okay...that probably means that I got the alignment of a halfword wrong. Try running it in PSPLink or something to see what errors.

[Raphael]

sceIoWriteAsync(fd, i, (SceSize)sizeof(i));

Actually reflecting on the code given rather than stupid copy&pasting would be a wise choice sometimes.

PS: Async IO on PSP only allows one async op at a time, so a second sceIoWrite call will just fail if the first one is still pending.

[Archaemic]

Actually reflecting on the code given rather than stupid copy&pasting would be a wise choice sometimes.

Okay, already did that with that post. All I copied and pasted was the function names, NOT the arguments. You'll see I changed a lot of things. All I did wrong was forget what arguments sceIoWriteAsync took. I thought he was trying to write the address, and I momentarily forgot that it took a pointer and not something like printf takes. Writing the contents of the address would be pretty pointless because we already know it would be 140 if the match succeeds.

Anyway, I didn't know how the PSP's async worked, so here's the fixed code:

int main_thread(SceSize args, void *argp) 
{
    sceKernelDelayThread(3000000);
    SceUID fd;
    SceCtrlData pad;
    int i;
    u8 health = 140;
    u8 *address;
    
    while(1)
    {
        sceCtrlReadBufferPositive(&pad, 1);
        
        if(pad.Buttons & PSP_CTRL_LTRIGGER)
        {
            if(pad.Buttons & PSP_CTRL_RTRIGGER)
            {
                break;
            }
        }
    }
    
    fd = sceIoOpen("ms0:/output.txt", PSP_O_CREAT|PSP_O_WRONLY|PSP_O_TRUNC, 0777);
    
    for(i = 0x08800000; i < 0x0A000000; ++i)
    {
         address = (u8*)i;
         if(*address == health)
         {
             sceIoWrite(fd, &i, (SceSize)sizeof(i));
         }
    }

    sceIoClose(fd);
    
    sceKernelSleepThread();
    return 0;
}