On 12/24/2010 04:21 PM, Yao Qi wrote:
> Patch 1 is about fixing GDB analyze i386 prologue for insns and/add,
> which are part of i386 prologue, but GDB can't handle.

Here is a prologue generated by GCC, instructions on [1] can't be 
handled by GDB so far.  This patch is to handle them in prologue parsing.

      push   %ebp
      mov    %esp,%ebp

      and    $0xfffffff0,%esp  // <---- [1]
      add    $0xffffff80,%esp  // <---- [1]

      mov    %gs:0x14,%eax
      mov    %eax,0x7c(%esp)
      xor    %eax,%eax

      lea    0x54(%esp),%eax

Note that `and' instruction, for alignment, is not a must in prologue. 
My knowledge on i386 prologue is very limited and GCC i386 prologue 
generate is too complicated to understand for me, so I am not pretty 
sure on this patch.  I send it out, and your comments are appreciated.

-- 
Yao Qi