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Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit reg
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically |
Date: |
Wed, 19 Nov 2008 00:07:39 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Paul Brook wrote:
>> The best approach, definitely, would be to teach GDB how to switch the
>> disassembler mode depending on the thread's (or VCPUs) state. But so
>> there is neither a mechanism in GDB for this, nor is GDB even aware of
>> the x86 modes (no tracking of privileged registers). We have some
>> preliminary patches for this, but they are still far away from GDB
>> mainline.
>
> I'm pretty sure all the infrastructure is there. gdb is able to natively
> debug
> 32-bit binaries on a 64-bit host and is able to switch disassembler modes for
> ARM vs. Thumb.
How is it done on ARM? Maybe that will provide the right pointer for x86.
For fun I recently tried to debug a 32-bit binary on a 64-bit host via
gdbserver - the fun ended as quickly as with qemu. The only way for
switching disassembly mode on x86 that I found is via set arch, and that
switching the register packet format as well.
Jan
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- [Qemu-devel] [PATCH v5 06/18] Respect length of watchpoints, (continued)
- [Qemu-devel] [PATCH v5 06/18] Respect length of watchpoints, Jan Kiszka, 2008/11/17
- [Qemu-devel] [PATCH v5 14/18] x86: Dump debug registers, Jan Kiszka, 2008/11/17
- [Qemu-devel] [PATCH v5 11/18] Add debug exception hook, Jan Kiszka, 2008/11/17
- [Qemu-devel] [PATCH v5 10/18] Introduce BP_WATCHPOINT_HIT flag, Jan Kiszka, 2008/11/17
- [Qemu-devel] [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Jan Kiszka, 2008/11/17
- Re: [Qemu-devel] [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Anthony Liguori, 2008/11/18
- Re: [Qemu-devel] [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Anthony Liguori, 2008/11/18
- Re: [Qemu-devel] [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Anthony Liguori, 2008/11/18
- [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Jan Kiszka, 2008/11/18
- Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Paul Brook, 2008/11/18
- Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically,
Jan Kiszka <=
- Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Paul Brook, 2008/11/18
- Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Jan Kiszka, 2008/11/18
- Re: [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Paul Brook, 2008/11/18
- [Qemu-devel] Re: [PATCH v5 18/18] gdbstub: x86: Switch 64/32 bit registers dynamically, Jan Kiszka, 2008/11/19
[Qemu-devel] [PATCH v5 08/18] Remove premature memop TB terminations, Jan Kiszka, 2008/11/17
[Qemu-devel] [PATCH v5 09/18] gdbstub: manage CPUs as threads, Jan Kiszka, 2008/11/17
[Qemu-devel] [PATCH v5 16/18] gdbstub: x86: Refactor register access, Jan Kiszka, 2008/11/17
[Qemu-devel] [PATCH v5 07/18] Restore pc on watchpoint hits, Jan Kiszka, 2008/11/17