[Simulavr-devel] RJMP/RCALL/BRBC/BRBS bug & configure error in simulavr-0.1.1, test-case and fix provided

[Thibaud Gaillard]

Hi,

Playing a bit with GCC-generated AVR code, I found simulavr-0.1.1
to fail when it comes to handle negative relative jumps that cross
the memory low boundary (still works fine crossing the high boundary).
This bug impacts RJMP/RCALL/BRBC/BRBS opcodes (jump instructions with
relative signed offsets).

There is also a "configure" script problem, at least on a sparc-sun-solaris2.x
host (/bin/sh does not handle "==" in "test" constructs, only "=").

Test-case (rjump_bug.s) and fix (simulavr-0.1.1.patch) both for "configure"
and "src/avrcore.c" provided.

Thibaud

PS: Theodore, I chose to resend this mail to the official mailing list,
    please forgive me for the double posting inconvenience :-)

rjmp_bug.s
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simulavr-0.1.1.patch
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