Debug PRX

[MBx]

How can I debug a kernel PRX?
printf on screen or writing to a file or ...?

[NoEffex]

Be creative :).

[MBx]

a hint please? :P

[MBx]

I've tried both printf and Kprintf but none of them seems to work.
I've also tried this (from psplink.h):

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#define DEBUG_START { int fd; fd = sceIoOpen("ms0:/debug.txt", PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0666); sceIoClose(fd); }
`
#define DEBUG_PRINTF(fmt, ...) \
{ \
	int fd; \
	fd = sceIoOpen("ms0:/debug.txt", PSP_O_WRONLY | PSP_O_APPEND, 0666); \
	fdprintf(fd, fmt, ## __VA_ARGS__); \
	sceIoClose(fd); \
}

still nothing :(

[hlide]

if you are using psplink, you can use stdout and stderr to output on pspsh

EDIT: ah ! kernel prx, oh well never mind.

[Torch]

You need this for kernel mode to write to memory stick, suppose you are trying to log from an exported function that is a syscall.
include systemctrl.h and add -lpspsystemctrl_kernel from M33SDK

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int k1 = pspSdkSetK1(0);
int level = sctrlKernelSetUserLevel(8);
SceUID fp = sceIoOpen("ms0:/seplugins/log.txt", PSP_O_WRONLY|PSP_O_CREAT, 0777);
sceIoLseek(fp, 0, SEEK_END);
sceIoWrite(fp, "log data", strlen("log data"));
sceIoClose(fp);
sctrlKernelSetUserLevel(level);
pspSdkSetK1(k1);

[MBx]

I included the "systemctrl.h" from M33SDK (4.01M33 any newer?) and the following compile errors:

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psp/sdk/include/systemctrl.h (200) : error: expected ')' before '*' t
oken
psp/sdk/include/systemctrl.h (241) : error: expected '=', ',', ';', '
asm' or '__attribute__' before 'sctrlHENSetStartModuleHandler'

is it really this HARD to just SEE some text somewhere? :(

just for curiosity: what is the user level 8?
and what is this M33SDK at all? any doc around? :p

[MBx]

OK, just replaced "fdprintf" with "sceIoWrite" and everything seems to work.

what's the difference between this two anyway?
is there any write function like "sceIoWrite" with printf format support?
is there any possible way to see Kernel output on screen?

[Torch]

is there any possible way to see Kernel output on screen?

Print it directly into video memory. Search for blit.c blit.h font.c which can do this.