mirror of
https://github.com/RaySollium99/picodrive.git
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42 lines
1.9 KiB
Text
42 lines
1.9 KiB
Text
*update*
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Use the "compress jumtable" Cyclone config.h option to fix this issue
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(no patcher will be needed then).
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There is a problem with Cyclone on symbian platform:
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GNU as generates COFF object files, which allow max of 0xFFFF (65535) relocation
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entries. Cyclone uses a jumptable of 0x10000 (65536, 1 for every opcode-word)
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antries. When the executable is loaded, all jumptable entries must be relocated
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to point to right code location. Because of this limitation, Cyclone's jumptable is
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incomplete (misses 2 entries), and if M68k opcodes 0xFFFE or 0xFFFF are ever
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encoundered when emulating, your emulator will crash.
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I have written a little patcher to fix that. It writes those two missing entries and
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marks them as relocatable. Placeholders must not be deleted just after the jumttable
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in the Cyclone source code.
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This version works with intermediate PE executable, which is used both for APPs and EXEs,
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and is produced by gcc toolkit just before running petran. So it's best to insert
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this in your makefile, in the rule which builds your APP/EXE, just after last 'ld'
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statement, for example:
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$(EPOCTRGUREL)\PICODRIVEN.APP : $(EPOCBLDUREL)\PICODRIVEN.in $(EPOCSTATLINKUREL)\EDLL.LIB $(LIBSUREL)
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...
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ld -s -e _E32Dll -u _E32Dll --dll \
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"$(EPOCBLDUREL)\PICODRIVEN.exp" \
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-Map "$(EPOCTRGUREL)\PICODRIVEN.APP.map" -o "$(EPOCBLDUREL)\PICODRIVEN.APP" \
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"$(EPOCSTATLINKUREL)\EDLL.LIB" --whole-archive "$(EPOCBLDUREL)\PICODRIVEN.in" \
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--no-whole-archive $(LIBSUREL) $(USERLDFLAGS)
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-$(ERASE) "$(EPOCBLDUREL)\PICODRIVEN.exp"
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patchtable_symb2 "$(EPOCBLDUREL)\PICODRIVEN.APP"
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petran "$(EPOCBLDUREL)\PICODRIVEN.APP" "$@" \
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-nocall -uid1 0x10000079 -uid2 0x100039ce -uid3 0x1000c193
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-$(ERASE) "$(EPOCBLDUREL)\PICODRIVEN.APP"
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perl -S ecopyfile.pl "$@" "PICODRIVEN.APP"
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This is also compatible with ECompXL.
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To test if this thing worked, you can load crash_cyclone.bin in your emulator.
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