During some debugging, we found that during a stack overflow, the SIGSEGV code returned is different on Power and Intel.
We were able to narrow down the test case to the follow simple code: https://github.com/leitao/stack/blob/master/overflow.c On Power, the SIGSEV si->si_code is 2 (SEGV_ACCERR) , meaning "access error". On the other way around, the same test on x86 returns si->si_code = 1 (SEGV_MAPERR), meaning "invalid permission". Any idea why such difference? Example: Power ----- $ gcc overflow.c $ ./a.out Got SIGSEGV(2) at address: 0x3fffdd90ffe0 x86 --- $ gcc overflow.c $ ./a.out Got SIGSEGV(1) at address: 0x7fff9f089fe8 Thank you! Breno _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
