help regarding epilogue/prologue sequence

[vijay nag]

Binary compiled with GCC-4.7.2 has a different epilogue/prologue
sequence when compared with the same binary emitted by GCC-3.3.6. I'm
sure I haven't used fomit-frame-pointer compilation flag.
What could be the issue here ? Is the linker doing some optimization
here ? It has rendered my executable undebuggable in gdb.

Prologue:
0804bfe9 <config_local_policy_ruledef_condition_variable_time_value>:
804bfe9:       55                      push   %ebp
804bfea:       57                      push   %edi
804bfeb:       56                      push   %esi
804bfec:       53                      push   %ebx
804bfed:       e8 0e 89 66 00    call   86b4900 <__x86.get_pc_thunk.bx>

Epilogue
804c495:       83 c4 6c             add    $0x6c,%esp
804c498:       5b                      pop    %ebx
804c499:       5e                      pop    %esi
804c49a:       5f                      pop    %edi
804c49b:       5d                      pop    %ebp
804c49c:       c3                      ret