Hi all,
I've got a program that seg faults on OpenBSD 6.0 AMD64 release that
runs fine on 5.9 i386.
I'm checking to see if will also run on 5.9 AMD64 right now but it
doesn't appear to be w^x related. To be sure I've mounted that
partition with wxallowed.
Here are the last few lines from kdump--would sure appreciate it if
someone could shed some light on what's happening.
47868 fastforward CALL
mmap(0,0x1000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0)
47868 fastforward RET mmap 9049032314880/0x83ae45b5000
47868 fastforward CALL
mmap(0,0x1000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0)
47868 fastforward RET mmap 9049215606784/0x83aef482000
47868 fastforward CALL
mmap(0,0xa000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0)
47868 fastforward RET mmap 9047796883456/0x83a9ab82000
47868 fastforward CALL mprotect(0x83b09fd2000,0x1000,0x1<PROT_READ>)
47868 fastforward RET mprotect 0
47868 fastforward CALL munmap(0x83a9ab82000,0xa000)
47868 fastforward RET munmap 0
47868 fastforward CALL mprotect(0x83870f07000,0x1000,0x1<PROT_READ>)
47868 fastforward RET mprotect 0
47868 fastforward CALL getthrid()
47868 fastforward RET getthrid 1047868/0xffd3c
47868 fastforward CALL __set_tcb(0x83b14ce3600)
47868 fastforward RET __set_tcb 0
47868 fastforward CALL
mmap(0,0x1000,0x3<PROT_READ|PROT_WRITE>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0)
47868 fastforward RET mmap 9049102131200/0x83ae884a000
47868 fastforward CALL mprotect(0x83ae884a000,0x1000,0x1<PROT_READ>)
47868 fastforward RET mprotect 0
47868 fastforward CALL
mprotect(0x83ae884a000,0x1000,0x3<PROT_READ|PROT_WRITE>)
47868 fastforward RET mprotect 0
47868 fastforward CALL mprotect(0x83ae884a000,0x1000,0x1<PROT_READ>)
47868 fastforward RET mprotect 0
47868 fastforward CALL sigaction(SIGPIPE,0x7f7ffffcdec0,0)
47868 fastforward STRU struct sigaction { handler=SIG_IGN, mask=0<>,
flags=0<> }
47868 fastforward RET sigaction 0
47868 fastforward PSIG SIGSEGV SIG_DFL code SEGV_MAPERR<1>
addr=0x71008620 trapno=6
47868 fastforward NAMI "fastforward.core"
I've re-compiled this also with what I found on the internet to make a
core file that gdb can use but that's even more of a mystery to me than
ktrace. Is there a better debugger that I can use?
Thanks,
Jeff Ross
