Core file Issue

Question

Any idea about the core file debugged by dbx debugger. I am not getting why this core file is generated. Please help me on this

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Reading mhost.new
core file header read successfully
Reading ld.so.1
Reading librt.so.1
Reading libclntsh.so.9.0
Reading libm.so.2
Reading libnsl.so.1
Reading libsocket.so.1
Reading libgen.so.1
Reading libdl.so.1
Reading libthread.so.1
Reading libc.so.1
Reading libaio.so.1
Reading libmd.so.1
Reading libwtc9.so
Reading libsched.so.1
Reading libc_psr.so.1
WARNING!!
A loadobject was found with an unexpected checksum value.
See `help core mismatch' for details, and run `proc -map'
to see what checksum values were expected and found.
dbx: warning: Some symbolic information might be incorrect.
t@1 (l@1) program terminated by signal SEGV (no mapping at the fault address)
0xff3be704: elf_find_sym+0x0114:        ldsb     [%l0 + %l4], %o2
(dbx) where
current thread: t@1
=>[1] elf_find_sym(0xffbfbbd8, 0xffbfbc68, 0xffbfbc64, 0xf194, 0xfe5986d2, 0xff3f0358), at 0xff3be704
  [2] _lookup_sym(0xff3f7360, 0xffbfbbd8, 0xffbfbc68, 0xffbfbc64, 0x0, 0xff3f0358), at 0xff3bbb7c
  [3] lookup_sym(0xffbfbc6c, 0xffbfbc68, 0xffbfbc64, 0xff3f7360, 0x1, 0xfe5986d2), at 0xff3bbe6c
  [4] elf_bndr(0x84d, 0xff391d38, 0xfe5c2124, 0xfe5986d2, 0xff3f42f0, 0x0), at 0xff3d207c
  [5] elf_rtbndr(0xfe5c2124, 0xfe6c3800, 0x1c00, 0x0, 0x0, 0x0), at 0xff3b84fc
  [6] 0xfe6bf3c4(0x0, 0x1cc4, 0xfe6c3800, 0xfe6c5180, 0xff352a00, 0x1c00), at 0xfe6bf3c4
  [7] _exithandle(0xfe6c5400, 0xfe6c3800, 0x1c00, 0x0, 0x0, 0x0), at 0xfe5c2124
  [8] exit(0x0, 0xffbfbe4c, 0xffbfbeb4, 0x139800, 0xff350100, 0x0), at 0xfe5b0550

Answer 1

SEGV indicates an access to undefined memory. It occurred in elf_find_sym. If debug symbols were included, then the dump would indicate the line number.

Use gcc -g <files>... to include debug symbol and line number information.