The gdb x86 function prologue parser

[Michael Snyder]

Eli Zaretskii wrote:
>>Cc: Mark Kettenis <mark.kettenis@xs4all.nl>, jason-swarelist@molenda.com,
>>        gdb-patches@sources.redhat.com
>>From: Klee Dienes <klee@mit.edu>
>>Date: Sun, 12 Jun 2005 07:59:01 -0400
>>
>>(2) gets used by GDB when it wants to know where to set a breakpoint  
>>(the idea being that when you say "break foo", it wants to insert the  
>>breakpoint in foo() after the prologue has been fully executed).
>>
>>It also gets used where GDB wants to know if it is inside a function  
>>prologue for some reason (for example, so "next" knows if it has  
>>stepped into a new function, or simply jumped interprocedurally).
> 
> 
> Thanks.
> 
> (I'm collecting info for gdbint.texinfo, that's why I asked.)

Also so "step into" can step past the prologue and not stop
until it has reached user code.  Same basic purpose as 2),
but different context.