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GP-0: Some DevGuide fixes

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Ryan Kurtz 2022-09-12 10:00:24 -04:00
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DevGuide.md
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@ -247,7 +247,7 @@ see if we are already developing one. Of course, in time you might also search t
if others are developing one. There are quite a few caveats and gotchas, the most notable being that if others are developing one. There are quite a few caveats and gotchas, the most notable being that
this interface is still in quite a bit of flux. When things go wrong, it could be because of, this interface is still in quite a bit of flux. When things go wrong, it could be because of,
without limitation: 1) a bug on your part, 2) a bug on our part, 3) a design flaw in the interfaces, without limitation: 1) a bug on your part, 2) a bug on our part, 3) a design flaw in the interfaces,
or 4) a bug in the debugger/API your adapting. We are still in the process of writing up this or 4) a bug in the debugger/API you're adapting. We are still in the process of writing up this
documentation. In the meantime, we recommend using the GDB and dbgeng.dll agents as examples. documentation. In the meantime, we recommend using the GDB and dbgeng.dll agents as examples.
You'll also need to provide launcher(s) so that Ghidra knows how to configure and start your You'll also need to provide launcher(s) so that Ghidra knows how to configure and start your
@ -274,8 +274,8 @@ the existing ones for examples.
In general, to write a new opinion, you need to know: 1) What the platform is called (including In general, to write a new opinion, you need to know: 1) What the platform is called (including
variant names) by the debugger, 2) What the processor language is called by Ghidra, 3) If variant names) by the debugger, 2) What the processor language is called by Ghidra, 3) If
applicable, the mapping of target address spaces into Ghidra's address spaces, 4) If applicable, the applicable, the mapping of target address spaces into Ghidra's address spaces, 4) If applicable, the
mapping of target register names to those in Ghidra's processor language.In most cases (3) and (4) mapping of target register names to those in Ghidra's processor language. In most cases (3) and (4)
are already implemented by default mappers, so you can use those same mappers in your opinion.Once are already implemented by default mappers, so you can use those same mappers in your opinion. Once
you have the opinion written, you can try debugging and recording a target. If Ghidra finds your you have the opinion written, you can try debugging and recording a target. If Ghidra finds your
opinion applicable to that target, it will attempt to record, and then you can work out the kinds opinion applicable to that target, it will attempt to record, and then you can work out the kinds
from there. Again, we have a bit of documentation to do regarding common pitfalls. from there. Again, we have a bit of documentation to do regarding common pitfalls.
@ -283,7 +283,7 @@ from there. Again, we have a bit of documentation to do regarding common pitfall
### Emulation ### Emulation
The most obvious integration path for 3rd-party emulators is to write a "connector." However, p-code The most obvious integration path for 3rd-party emulators is to write a "connector." However, p-code
emulation is now an integral feature of the Ghidra UI, and it has a fairly accessible API. Namely emulation is now an integral feature of the Ghidra UI, and it has a fairly accessible API. Namely,
for interpolation between machines states recorded in a trace, and extrapolation into future machine for interpolation between machines states recorded in a trace, and extrapolation into future machine
states. Integration of such emulators may still be useful to you, but we recommend trying the p-code states. Integration of such emulators may still be useful to you, but we recommend trying the p-code
emulator to see if it suits your needs for emulation in Ghidra before pursuing integration of emulator to see if it suits your needs for emulation in Ghidra before pursuing integration of