vgkintsugi / ghidra-segasaturn-loader Goto Github PK

View Code? Open in Web Editor NEW

45.0 8.0 4.0 727 KB

A Sega Saturn loader for Ghidra

License: Apache License 2.0

CSS 3.46% HTML 1.15% Java 95.39%

sega-saturn ghidra sh-2 sh-1 superh reverse-engineering

ghidra-segasaturn-loader's People

Contributors

Stargazers

Watchers

Forkers

resonancellc h0r1z0n 00mjk jollyrogerxp

ghidra-segasaturn-loader's Issues

Split Memory Map Code Into Separate Script

Split the memory map code into a separate script. Call it from the loader.

Create a memory map for the SH-1 as well.

VDP2 Registers are Named Incorrectly

When labelling the VDP2 registers the names of the SCU registers are used by mistake. The correct names can be found here: https://github.com/ijacquez/libyaul/blob/develop/libyaul/scu/bus/b/vdp/vdp2/map.h

"Too many sections big!!" error when loading Mednafen save state

Here is a Mednafen save state for Dungeons & Dragons Collection, Disc 1. It fails to load with this error:

----- Loading /C:/Games/Mednafen/mcs/Dungeons & Dragons Collection (Japan) (Disc 1) (Tower of Doom).458e98aeae4d21ae821a665722d2e5b9.mc0 -----
Too many sections big!!
java.io.IOException: Too many sections big!!
	at segasaturnloader.SegaSaturnLoader.mssMakeSectionMap(SegaSaturnLoader.java:1325)
	at segasaturnloader.SegaSaturnLoader.loadMednafenSaveState(SegaSaturnLoader.java:1689)
	at segasaturnloader.SegaSaturnLoader.load(SegaSaturnLoader.java:128)
	at ghidra.app.util.opinion.AbstractLibrarySupportLoader.doLoad(AbstractLibrarySupportLoader.java:724)
	at ghidra.app.util.opinion.AbstractLibrarySupportLoader.loadProgram(AbstractLibrarySupportLoader.java:98)
	at ghidra.app.util.opinion.AbstractProgramLoader.load(AbstractProgramLoader.java:126)
	at ghidra.plugin.importer.ImporterUtilities.importSingleFile(ImporterUtilities.java:368)
	at ghidra.plugin.importer.ImporterDialog.lambda$okCallback$7(ImporterDialog.java:351)
	at ghidra.util.task.TaskBuilder$TaskBuilderTask.run(TaskBuilder.java:306)
	at ghidra.util.task.Task.monitoredRun(Task.java:134)
	at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

Failed to parse MSS sections!
java.io.IOException: Failed to parse MSS sections!
	at segasaturnloader.SegaSaturnLoader.loadMednafenSaveState(SegaSaturnLoader.java:1692)
	at segasaturnloader.SegaSaturnLoader.load(SegaSaturnLoader.java:128)
	at ghidra.app.util.opinion.AbstractLibrarySupportLoader.doLoad(AbstractLibrarySupportLoader.java:724)
	at ghidra.app.util.opinion.AbstractLibrarySupportLoader.loadProgram(AbstractLibrarySupportLoader.java:98)
	at ghidra.app.util.opinion.AbstractProgramLoader.load(AbstractProgramLoader.java:126)
	at ghidra.plugin.importer.ImporterUtilities.importSingleFile(ImporterUtilities.java:368)
	at ghidra.plugin.importer.ImporterDialog.lambda$okCallback$7(ImporterDialog.java:351)
	at ghidra.util.task.TaskBuilder$TaskBuilderTask.run(TaskBuilder.java:306)
	at ghidra.util.task.Task.monitoredRun(Task.java:134)
	at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

Presumably this has something to do with the game's support for the 4MB RAM cartridge. I tried disabling the emulation of that, but got the same error.

Is there anything else I can do to work around this?

Thanks for reading, and for making this loader - I use it all the time!

Memory Map: Add On-Chip Registers

Add support for on-chip registers. According to https://wiki.yabause.org/index.php5?title=SH-2CPU there in the region 0xFFFFFE00-0xFFFFFFFF.

Declare Certain Memory Regions as Volatile

Ghidra has the ability to set certain memory regions as volatile. Enable it for the memory mapped registers.

Attempt to reconstruct sections.

The Saturn SDK examples(entry.s) show bss start and end locations, perhaps this can be used to reconstruct at least some sections?
I haven't checked Saturn binaries with symbols much, but maybe something refs text and data section ranges as well?

Add Mednafen Save State Support

Add support for loading save states created by the Mednafen emulator.

CD_Base is Incorrect

//
// CD registers taken from: https://wiki.yabause.org/index.php5?title=CDBlock
//

final int CD_BASE = 0x20100000;

CD_BASE should be 0x25890000 according to the Yabause link referenced in the code. Credit user @Ced2911

vgkintsugi / ghidra-segasaturn-loader Goto Github PK

ghidra-segasaturn-loader's People

Contributors

Stargazers

Watchers

Forkers

ghidra-segasaturn-loader's Issues

Recommend Projects

Recommend Topics

Recommend Org

Jobs