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[PATCH 0/2] Add additional plugin API functions to read and write memory
From: |
Rowan Hart |
Subject: |
[PATCH 0/2] Add additional plugin API functions to read and write memory and registers |
Date: |
Fri, 6 Dec 2024 00:00:02 -0800 |
This patch set follows a previous patch which added the
qemu_plugin_read_memory_vaddr function and adds a set of similar
functions to read and write registers, virtual memory, and
physical memory.
The use case I have in mind is for use of QEMU for program analysis and
testing. For example, a fuzzer which uses QEMU for emulation might wish to
inject test data into a program at runtime using qemu_plugin_write_memory_vaddr
(and likewise if testing an operating system or bare metal application using
qemu_plugin_write_memory_hwaddr). It may also wish to read the initial contents
of memory using qemu_plugin_read_memory_vaddr/hwaddr.
Similarly, a testing framework may wish to fake register values, perhaps to
simulate a device failure, perhaps by using qemu_plugin_write_register to set a
register value to an error code.
I think all this functionality works together to make QEMU
plugins more powerful and versatile, hopefully removing barriers
to using upstream QEMU for these tasks which have historically
required maintaining a QEMU fork downstream (like QEMUAFL
https://github.com/AFLplusplus/qemuafl), which is tedious, error
prone, and results in users missing out on enhancements to QEMU.
novafacing (2):
Expose gdb_write_register function to consumers of gdbstub
Add plugin API functions for register R/W, hwaddr R/W, vaddr W
gdbstub/gdbstub.c | 2 +-
include/exec/gdbstub.h | 14 +++++
include/qemu/qemu-plugin.h | 116 +++++++++++++++++++++++++++++++++----
plugins/api.c | 66 ++++++++++++++++++++-
4 files changed, 183 insertions(+), 15 deletions(-)
--
2.46.1
- [PATCH 0/2] Add additional plugin API functions to read and write memory and registers,
Rowan Hart <=