From: Jon Doron <arilou@gmail.com>
Date: Thu, 9 Jul 2020 14:13:17 +0000 (+0100)
Subject: docs: Add to gdbstub documentation the PhyMemMode
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=506794677594120ff02a0ad3bfbdcb7b0acca608;p=qemu.git

docs: Add to gdbstub documentation the PhyMemMode

The PhyMemMode gdb extension command was missing from the gdb.rst
document.

Signed-off-by: Jon Doron <arilou@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200601171609.1665397-1-arilou@gmail.com>
Message-Id: <20200709141327.14631-4-alex.bennee@linaro.org>
---

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.