Ok, I'll stop nagging after this message for a while.

I added to the Makefile:
timer.o:
        $(CC) $(CFLAGS) -mgeneral-regs-only -mno-red-zone $< -o $@

And now it compile.

But when run:
Page fault CR2=00400002 in RMCB at eip 6; flags=3016
... error=0004

which I believe was what I was receiving when adding iret at the end.






---- Le lun., 02 oct. 2023 13:06:35 -0400 Paul Dufresne via Freedos-user  a 
écrit ----

 > I have been able to rebuild the game using prebult cross-compiler from 
 > build-djgpp project.
 > 
 > When I add __asm__("iret");
 > program crash as soon as I launch it.
 > Sorry not having the error now.
 > 
 > I am trying to:
 > __attribute__((interrupt))
 > void timer_handler(void *frame)
 > {
 >  ticks++;
 > ...
 > 
 > but getting:
 > i586-pc-msdosdjgpp-gcc -I. 
 > -I/home/paul/Téléchargements/libmikmod-3.3.11.1/include -c -Wall -Werror 
 > -pedantic -O3 -fomit-frame-pointer -ffast-math -march=i386 vga.c -o vga.o
 > timer.c: In function 'timer_handler':
 > timer.c:17:1: sorry, unimplemented: 80387 instructions aren't allowed in an 
 > interrupt service routine
 >  17 | {
 >  | ^
 > make[1]: *** [Makefile:29: timer.o] Error 1
 > make[1]: *** Waiting for unfinished jobs....
 > make[1]: Leaving directory '/home/paul/my_gminer/gold-mine-run/src'
 > make: *** [Makefile:2: all] Error 2
 > paul@fedora:~/my_gminer/gold-mine-run2$ 
 > 
 > 
 > Following:
 > https://stackoverflow.com/questions/55437894/how-to-correctly-compile-interrupt-service-routine-using-gcc
 > I have tried to add: -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow 
 > -mno-red-zone at the end of CFLAGS
 > but it does not appears that my changes change the way the file is 
 > compiled...
 > 
 > I think I am very bad at editing Makefiles!
 > 
 > 
 > 
 > 
 > 
 > _______________________________________________
 > Freedos-user mailing list
 > Freedos-user@lists.sourceforge.net
 > https://lists.sourceforge.net/lists/listinfo/freedos-user
 > 


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