Psp Usermode Tutorial

[Vagosdj]

It doesn't work with psp go.Help.

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[Xian Nox]

It doesn't work with psp go.Help.

No one can help you unless you provide some proper information.

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[Vagosdj]

Sgdeemer doesn't work for my psp go.It freeze and shutdown.It's cfw is 6.60 pro c2.

[hgoel0974]

I found some error with the makefile for the "Green Screen Flasher",
at line 9:

Code: Select all

 rm -rf *~ *.o *.elf *.bin main.s *.bin hx

Code: Select all

PSPSDK=$(shell psp-config --pspsdk-path)
PSPDEV=$(shell psp-config --pspdev-path)
INCLUDE=$(PSPSDK)/include

all:    main

clean:
   rm -rf *~ *.o *.elf *.bin main.s *.bin hx

CC       = psp-gcc
CFLAGS   := -D PSP -I $(INCLUDE) -W -Wall -O2 -G0 -fno-pic -mno-abicalls -w -fomit-frame-pointer

ASM      = psp-as


main.o: main.c
   $(CC) $(CFLAGS) -S main.c -o main.s
   $(ASM) main.s -o main.o

main: main.o linker.x
   $(PSPDEV)/bin/psp-ld -T linker.x -L$(PSPSDK)/lib main.o -o main.elf
   $(PSPDEV)/bin/psp-strip -s main.elf
   $(PSPDEV)/bin/psp-objcopy -O binary main.elf h.bin

Fix with :

Code: Select all

PSPSDK=$(shell psp-config --pspsdk-path)
PSPDEV=$(shell psp-config --pspdev-path)
INCLUDE=$(PSPSDK)/include

all:    main

clean:
	rm -rf *~ *.o *.elf *.bin main.s *.bin 

CC       = psp-gcc
CFLAGS   := -D PSP -I $(INCLUDE) -W -Wall -O2 -G0 -fno-pic -mno-abicalls -w -fomit-frame-pointer

ASM      = psp-as

sdk.o: sdk.S
	$(ASM) sdk.S -o sdk.o


main.o: main.c
	$(CC) $(CFLAGS) -S main.c -o main.s
	$(ASM) main.s -o main.o

main: main.o sdk.o linker.x
	$(PSPDEV)/bin/psp-ld -T linker.x -L$(PSPSDK)/lib main.o sdk.o -o main.elf
	$(PSPDEV)/bin/psp-strip -s main.elf
	$(PSPDEV)/bin/psp-objcopy -O binary main.elf h.bin

When i try do this:



how I can fix it?

That happens because the makefile expects a TAB there, not spaces, so select the spaces right before the line and replace them with a tab, do it for each line that throws the exception

[liquidmagic]

did i ever tell you i love you guys XDD

[grief3r]

how can i hex edit an iso so that it loads the opcode i want for an address

for example if an instruction was beq,what do i need to do to make it load bne instead without the need of a cheat device?

[qwikrazor87]

how can i hex edit an iso so that it loads the opcode i want for an address

for example if an instruction was beq,what do i need to do to make it load bne instead without the need of a cheat device?

Extract EBOOT.BIN from disc0:/PSP_GAME/SYSDIR/.
Decrypt EBOOT.BIN, look for the instruction that you want to modify, modify it and save the file. Use UMDGen to replace EBOOT.BIN with your modified one and save as an ISO.

[grief3r]

i got one game to crash without the name method, i also used a cheat device to get it to crash but how do i find $ra when i decrypt the save?

[Kankertje]

i got one game to crash without the name method, i also used a cheat device to get it to crash but how do i find $ra when i decrypt the save?

Post exception from psplink, then we'll see if its exploitable

[grief3r]

i'd have to fix my psp before i do that lol, it's just one cable that needs replacement
don't know why it crashed on vita but on psp emu it doesn't