From 506794677594120ff02a0ad3bfbdcb7b0acca608 Mon Sep 17 00:00:00 2001 From: Jon Doron Date: Thu, 9 Jul 2020 15:13:17 +0100 Subject: docs: Add to gdbstub documentation the PhyMemMode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The PhyMemMode gdb extension command was missing from the gdb.rst document. Signed-off-by: Jon Doron Signed-off-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20200601171609.1665397-1-arilou@gmail.com> Message-Id: <20200709141327.14631-4-alex.bennee@linaro.org> --- docs/system/gdb.rst | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'docs') diff --git a/docs/system/gdb.rst b/docs/system/gdb.rst index a40145fcf8..abda961e2b 100644 --- a/docs/system/gdb.rst +++ b/docs/system/gdb.rst @@ -87,3 +87,23 @@ three commands you can query and set the single step behavior: (gdb) maintenance packet Qqemu.sstep=0x5 sending: "qemu.sstep=0x5" received: "OK" + + +Another feature that QEMU gdbstub provides is to toggle the memory GDB +works with, by default GDB will show the current process memory respecting +the virtual address translation. + +If you want to examine/change the physical memory you can set the gdbstub +to work with the physical memory rather with the virtual one. + +The memory mode can be checked by sending the following command: + +``maintenance packet qqemu.PhyMemMode`` + This will return either 0 or 1, 1 indicates you are currently in the + physical memory mode. + +``maintenance packet Qqemu.PhyMemMode:1`` + This will change the memory mode to physical memory. + +``maintenance packet Qqemu.PhyMemMode:0`` + This will change it back to normal memory mode. -- cgit v1.2.3