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Diffstat (limited to 'docs/system/gdb.rst')
| -rw-r--r-- | docs/system/gdb.rst | 20 |
1 files changed, 20 insertions, 0 deletions
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. |