[Qemu-devel] tests fail - sigsegv?

[Kevin F. Quinn]

Hi.  I thought to run the tests supplied with qemu, however tripped up on the 
exception checks.


test-i386.c uses setjmp(), which on my system (and according to the man patch 
any SYSV system) sets stuff for the next exception only.  Changing all of these 
except the very last one to sigsetjmp gets things to work.  I did this the lazy 
way and added

#define setjmp(X) sigsetjmp(X,1)

before the declaration of 'void test_exceptions(void), and

#undef setjmp

before the 'printf("single step exception:\n");' statement (i.e. before the 
last setjmp call).  I don't know whether sigsetjmp is available on all 
platforms - perhaps configure et. el. can sort that out.


There is one difference I get in the results; on the host, the self-modifying 
code test geenrates SEGV ACCERR ("Invalid permissions for mapped object"), on 
qemu it generates SEGV MAPERR ("Address not mapped to object").  This may not 
be significant, but then perhaps it is...


Kev.