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Re: [PATCH] Save CS segment register for ljmp instruction
- From: Hui Zhu <teawater at gmail dot com>
- To: Jiang Jilin <freephp at gmail dot com>
- Cc: Michael Snyder <msnyder at vmware dot com>, gdb-patches ml <gdb-patches at sourceware dot org>
- Date: Mon, 12 Oct 2009 15:54:31 +0800
- Subject: Re: [PATCH] Save CS segment register for ljmp instruction
- References: <1255314282-23062-1-git-send-email-freephp@gmail.com>
Could you post some code to test the ljmp and cs? I am not sure about cs part.
Thanks,
Hui
On Mon, Oct 12, 2009 at 10:24, Jiang Jilin <freephp@gmail.com> wrote:
> Hi Hui,
>
> I think CS register should be stored for ljmp instruction, but I'm
> not pretty sure, please help me confirm it.
>
> Thanks!
>
> 2009-10-12 ?Jiang Jilin ?<freephp@gmail.com>
>
> ? ? ? ?* i386-tdep.c (i386_process_record): Save CS segment register
> ? ? ? ?for ljmp instruction
> ---
> ?gdb/i386-tdep.c | ? ?3 +++
> ?1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
> index b4dc646..0145008 100644
> --- a/gdb/i386-tdep.c
> +++ b/gdb/i386-tdep.c
> @@ -3606,8 +3606,11 @@ reswitch:
> ? ? ? ? ?break;
> ? ? ? ? ?/* jmp */
> ? ? ? ?case 4:
> + ? ? ? ? I386_RECORD_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
> + ? ? ? ? break;
> ? ? ? ? ?/* ljmp */
> ? ? ? ?case 5:
> + ? ? ? ? I386_RECORD_ARCH_LIST_ADD_REG (X86_RECORD_CS_REGNUM);
> ? ? ? ? ?I386_RECORD_ARCH_LIST_ADD_REG (X86_RECORD_EFLAGS_REGNUM);
> ? ? ? ? ?break;
> ? ? ? ? ?/* push */
> --
> 1.5.4.3
>
>