Getting assembled code

tryphon · Post by **tryphon** » Sat Jul 18, 2015 6:41 pm

Hello,

for debugging purposes, I'd like to be able to locate the addresses of my compiled functions in the ROM (so I could set breakpoints in Gens, for example).

Is there a way to change the "make.exe -f makefile.gen" command to do that ?

Stef · Post by **Stef** » Sat Jul 18, 2015 11:09 pm

you can modify the makefile.gen to produce symbol list for instance.
In the next SGDK version i will add a "debug" target to produce debug symbols

Post by **KanedaFr** » Sat Jul 18, 2015 11:25 pm

you can use NM for that.
It's what I'm using to generate watchers for KMod,like in this makefile
https://bitbucket.org/SpritesMind/genre ... ile?at=dev

command :

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$(NM) -n -S -t x $(ROM).out >$(ROM).nm

I think you'll need to generate the binary with -g flag, to keep symbols[/code]

tryphon · Post by **tryphon** » Sun Jul 19, 2015 8:17 am

Thanks for anwers !

you can modify the makefile.gen to produce symbol list for instance.

Sorry, I'm new to makefiles and GCC command line options (and the least that can be said is that the man page is dense

).

I suppose I must add a flag in :

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release: FLAGS= $(DEFAULT_FLAGS) -O1 -fomit-frame-pointer

but which one ? (-g ?)

I think you'll need to generate the binary with -g flag, to keep symbols

Seems interesting. What's the exact name of it (because NM search on Google gives gazillions of results, none of them related to coding

) ?

Stef · Post by **Stef** » Sun Jul 19, 2015 10:04 am

In the makefile.gen fle you can replace this line :

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out/rom.bin: out/rom.out

by

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out/rom.bin: out/rom.out out/symbol.txt

and you will always have a symbol.txt file produced along the rom.bin file so you know the address of your variables and functions.

tryphon · Post by **tryphon** » Sun Jul 19, 2015 12:41 pm

In fact you already did it, I just didn't notice

Sorry for bothering

Stef · Post by **Stef** » Sun Jul 19, 2015 2:57 pm

Almost, you just need to modify a bit the makefile.gen file. In next SGDK version using the "debug" target will automatically produce the symbol file.

tryphon · Post by **tryphon** » Sun Jul 19, 2015 8:44 pm

Nope :

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make.exe -f makefile.gen debug

generated a symbol.txt.

There's these lines in makefile.gen :

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debug: FLAGS= $(DEFAULT_FLAGS) -O1 -ggdb -DDEBUG=1
debug: out/rom.bin out/rom.out out/symbol.txt

I suppose they are the one responsibles for that, and I assume they are yours

Stef · Post by **Stef** » Sun Jul 19, 2015 8:51 pm

Ohhh indeed i though it was not yet available ^^