ARM9 code should be separated from ARM11 - Githubissues

AlecRalsten / OSKA

ARM11 and Arm9 Kernel from ninjhax

GNU General Public License v3.0

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ARM9 code should be separated from ARM11 #1

Closed 173210 closed 9 years ago

173210 commented 9 years ago

They have some differences which makes impossible to write into the same source file:

They have different memory spaces. For example, if you tried to call printf from ARM9, it will crash.
They have different instructions. The difference is a little, but it can be a fatal problem.

How to fix it:

Write ARM9 code in another file, and compile with "-march=armv5te -mcpu=arm946e-s" instead of "-march=armv6k -mtune=mpcore."
Use a linker script for ARM9
Use objcopy to make ARM9 object file to load.

arm-none-eabi-objcopy -S -O binary arm9.elf arm9.bin
arm-none-eabi-objcopy -I binary -O elf32-little arm9.bin arm9.o

173210 commented 9 years ago

ARM9 code has removed from oska.c by commit 4766350b1f3c6c2c93a248ee9a8c0b480ac8bd9b.