QEMU Rust Crates + Plugins in Rust

Hi all, this is my first post to the mailing list! I've spent the last couple weeks building QEMU Rust crates to enable a couple goals: - Install QEMU binaries using cargo, the Rust package manager - Use git-latest QEMU binaries in Rust projects as a dependency - Write QEMU TCG plugins entirely in

[PATCH] plugins: add plugin API to read guest memory

Signed-off-by: Rowan Hart --- docs/about/emulation.rst | 16 - include/qemu/qemu-plugin.h | 24 +++- plugins/api.c| 21 +++ plugins/qemu-plugins.symbols | 1 + tests/tcg/plugins/mem.c | 37 +++- tests/tcg/plugins/syscall.c | 113

Re: [PATCH] plugins: add plugin API to read guest memory

Alex & Pierrick, Thank you for the feedback! This is my first contribution to QEMU, so I'm glad it at least passes the initial smell test :) > I'll make my comments in this patch, but for v2, please split those individual > commits, and a cover letter, describing your changes (https://github.com/

Re: [PATCH] plugins: add plugin API to read guest memory

Alex, Thanks for the additional information. >> >> A key aspect of what you propose here, is that the memory may have >> changed during the write time, and when you read it, while what we >> propose guarantees to track every change correctly. >> >> It's not a bad thing, and both API are definitel

[PATCH v2 1/2] plugins: add plugin API to read guest memory

Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 32 +++- plugins/api.c| 20 plugins/qemu-plugins.symbols | 1 + 3 files changed, 52 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v2 0/2] plugins: add plugin API to read guest memory

) * Accurate and easier execution trace extraction * Debugging and logging tools An example of its use is added to the existing syscalls plugin, which now has an option to hexdump the buf argument to any write(2) syscalls which occur. Rowan Hart (2): plugins: add plugin API to read guest memory

[PATCH v2 2/2] plugins: add option to dump write argument to syscall plugin

Signed-off-by: Rowan Hart --- docs/about/emulation.rst| 14 - tests/tcg/plugins/syscall.c | 117 2 files changed, 130 insertions(+), 1 deletion(-) diff --git a/docs/about/emulation.rst b/docs/about/emulation.rst index eea1261baa..e85d494ff0 100644

[PATCH v3 1/2] plugins: add plugin API to read guest memory

Signed-off-by: Rowan Hart Reviewed-by: Pierrick Bouvier --- include/qemu/qemu-plugin.h | 32 +++- plugins/api.c| 20 plugins/qemu-plugins.symbols | 1 + 3 files changed, 52 insertions(+), 1 deletion(-) diff --git a/include

[PATCH v3 0/2] plugins: add plugin API to read guest memory

doc build issue. Rowan Hart (2): plugins: add plugin API to read guest memory plugins: add option to dump write argument to syscall plugin docs/about/emulation.rst | 14 - include/qemu/qemu-plugin.h | 32 +- plugins/api.c| 20 ++ plugins/qemu-plugi

[PATCH v3 2/2] plugins: add option to dump write argument to syscall plugin

Signed-off-by: Rowan Hart Reviewed-by: Pierrick Bouvier Tested-by: Pierrick Bouvier --- docs/about/emulation.rst| 14 - tests/tcg/plugins/syscall.c | 117 2 files changed, 130 insertions(+), 1 deletion(-) diff --git a/docs/about/emulation.rst b

[PATCH 0/1] plugins: add API to read guest CPU memory from hwaddr

00 00 00 00 00 00 00 00 00 00 00 00 00 | Hello, RISC-V! Rowan Hart (1): plugins: add API to read guest CPU memory from hwaddr include/qemu/qemu-plugin.h | 22 ++ plugins/api.c| 17 + plugins/qemu-plugins.symbols | 2 ++ 3

[PATCH 1/1] plugins: add API to read guest CPU memory from hwaddr

Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 22 ++ plugins/api.c| 17 + plugins/qemu-plugins.symbols | 2 ++ 3 files changed, 41 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index

Re: [PATCH 1/1] plugins: add API to read guest CPU memory from hwaddr

> + qemu_plugin_read_cpu_memory_hwaddr; > + qemu_plugin_read_io_memory_hwaddr; This second symbol name should be removed, I initially wanted to implement for IO as well but there is no good generic way I can see to access a list of IO AddressSpace to read from.

[PATCH v2 1/1] plugins: add API to read guest CPU memory from hwaddr

Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 22 ++ plugins/api.c| 17 + plugins/qemu-plugins.symbols | 1 + 3 files changed, 40 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index

[PATCH v2 0/1] plugins: add API to read guest CPU memory from hwaddr

00 00 00 00 00 00 00 00 00 00 00 00 00 | Hello, RISC-V! For v2, removes a symbol left in qemu-plugins.symbols accidentally. Rowan Hart (1): plugins: add API to read guest CPU memory from hwaddr include/qemu/qemu-plugin.h | 22 ++ plugins/

Re: [PATCH 0/1] plugins: add API to read guest CPU memory from hwaddr

> > See: > > tests/tcg/i386/system/boot.S > tests/tcg/alpha/system/boot.S > tests/tcg/loongarch64/system/boot.S > tests/tcg/aarch64/system/boot.S > tests/tcg/x86_64/system/boot.S > tests/tcg/arm/system/boot.S > > for what is needed (basically a MMU-enabled flat memory map and some >

[PATCH v2 2/3] Add plugin API functions for register R/W, hwaddr R/W, vaddr W

From: novafacing --- include/qemu/qemu-plugin.h | 116 + plugins/api.c | 66 - 2 files changed, 168 insertions(+), 14 deletions(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index 0fba36ae02..b812593

[PATCH v2 0/3] Add additional plugin API functions to read and write memory and registers

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 fuzze

[PATCH v2 3/3] Add inject plugin and x86_64 target for the inject plugin

tests/tcg/plugins/inject.c create mode 100644 tests/tcg/x86_64/inject-target.c diff --git a/tests/tcg/plugins/inject.c b/tests/tcg/plugins/inject.c new file mode 100644 index 00..9edc2cd34e --- /dev/null +++ b/tests/tcg/plugins/inject.c @@ -0,0 +1,206 @@ +/* + * Copyright (C) 2024, Rowan

[PATCH v2 1/3] Expose gdb_write_register function to consumers of gdbstub

From: novafacing --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h | 14 ++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index b1def7e71d..7d87a3324c 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -536,7 +536

[PATCH 0/2] Add additional plugin API functions to read and write memory and registers

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 fuzze

[PATCH 1/2] Expose gdb_write_register function to consumers of gdbstub

From: novafacing --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h | 14 ++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index b1def7e71d..7d87a3324c 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -536,7 +536

[PATCH 2/2] Add plugin API functions for register R/W, hwaddr R/W, vaddr W

From: novafacing --- include/qemu/qemu-plugin.h | 116 + plugins/api.c | 66 - 2 files changed, 168 insertions(+), 14 deletions(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index 0fba36ae02..b812593

Re: [PATCH v2 3/3] Add inject plugin and x86_64 target for the inject plugin

>> +++ b/tests/tcg/plugins/inject.c > > Could we find a better name? For sure, maybe "hypercalls.c" since that's really what it's mostly about. >> @@ -0,0 +1,206 @@ >> +/* >> + * Copyright (C) 2024, Rowan Hart >> + * >> + * Licen

Re: [PATCH v2 0/3] Add additional plugin API functions to read and write memory and registers

> I am personally in favor to adding such features in upstream QEMU, but we > should discuss it with the maintainers, because it would allow to change the > state of execution, which is something qemu plugins actively didn't try to > do. It's a real paradigm shift for plugins. > > By writing to

[PATCH v3 4/8] Add memory virtual address write API

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index

[PATCH v3 0/8] Add additional plugin API functions to read and write memory and registers

This patch series adds several new API functions focused on enabling use cases around reading and writing guest memory from QEMU plugins. To support these new APIs, some utility functionality around retrieving information about address spaces is added as well. The new qemu_plugin_write_register ut

[PATCH v3 5/8] Add memory hardware address read/write API

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 96 +++ plugins/api.c | 100 + 2 files changed, 196 insertions(+) diff --git a/include/qemu/qemu-plugin.h b

[PATCH v3 8/8] Update plugin version and add notes

From: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 12 +++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index d4f229abd9..4cf2955560 100644 --- a/include/qemu/qemu-plugin.h +++ b/include

[PATCH v3 6/8] Add patcher plugin and test

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 324 ++ tests/tcg/x86_64/Makefile.softmmu-target

[PATCH v3 3/8] Add address space API

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/plugin.h | 6 +++ include/qemu/qemu-plugin.h | 45 ++ plugins/api.c | 79 ++ 3 files changed, 130 insertions(+) diff --git a

[PATCH v3 7/8] Add hypercalls plugin and test

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/hypercalls.c| 552 ++ tests/tcg/plugins/meson.build | 2 +- tests/tcg/x86_64/Makefile.softmmu

[PATCH v3 1/8] Expose gdb_write_register function to consumers of gdbstub

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h | 14 ++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index 565f6b33a9..5846e481be 100644 --- a

[PATCH v3 2/8] Add register write API

From: novafacing Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 57 +- plugins/api.c | 26 - 2 files changed, 56 insertions(+), 27 deletions(-) diff --git a/include/qemu/qemu-plugin.h b

Re: [PATCH v3 2/8] Add register write API

Hi Julian, > Again, what was the reason for moving `qemu_plugin_read_register`? I moved it so it's grouped with get_registers above instead of being separated below the memory functions. I can move it back, just seemed nicer that way. -Rowan On Thu, May 22, 2025, 4:59 AM Julian Ganz wrote: >

Re: [PATCH v3 2/8] Add register write API

> a) handle the QEMU_PLUGIN_CB_RW_REGS I missed that this was not already handled. I'll fix that. > b) try and enforce we are only being called from such callbacks Sure, beyond documentation I suppose we can add and check a flag to ensure this. I think it's a good idea to reduce foot guns from

Re: [PATCH v3 5/8] Add memory hardware address read/write API

> > > > This definition strikes me as odd. What was your reason to assert > > `current_cpu` here, but not in the other two functions? Also a bit > > surprising is the declaration of `cpu` if you use it in just one place > > (rather than just use `current_cpu` directly as for the assertion). > > > >

Re: [PATCH v3 5/8] Add memory hardware address read/write API

Well, first I just noticed that I left a debug print in this function! So I'll fix that. Reading this patch, and patch 3 (Add address space API), I am not sure AddressSpace is something we want to leak in plugins interface. It is a concept *very* internal to QEMU, and not reflecting directly s

[PATCH v4 7/9] plugins: Add hypercalls plugin and test

From: novafacing This patch adds a plugin that implements a simple form of hypercalls from guest code to the plugin by using the register read API. It accepts only one hypercall, which writes a magic value to guest memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg

[PATCH v4 6/9] plugins: Add patcher plugin and test

: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 302 ++ tests/tcg/x86_64/Makefile.softmmu-target | 32 ++- tests/tcg/x86_64/system/patch

[PATCH v4 8/9] plugins: Remove use of qemu_plugin_read_register where it is not permitted

flags are enforced and qemu_plugin_read_register can no longer be called from a vcpu_init callback because it does not request the QEMU_PLUGIN_CB_ flag (nor does it have a mechanism to do so). Signed-off-by: Rowan Hart --- tests/tcg/plugins/insn.c | 22 +- 1 file changed, 1

[PATCH v4 3/9] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 27 + include/qemu/plugin.h | 12 include/qemu/qemu-plugin.h

[PATCH v4 5/9] plugins: Add memory hardware address read/write API

to permit a specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 93 plugins

[PATCH v4 0/9] Add additional plugin API functions to read and write memory and registers

of these functions in the future if we change our minds! Rowan Hart (2): plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks plugins: Remove use of qemu_plugin_read_register where it is not permitted novafacing (7): gdbstub: Expose gdb_write_register functio

[PATCH v4 4/9] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v4 2/9] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Signed-off-by: novafacing Signed-off-by: Rowan Hart

[PATCH v4 1/9] gdbstub: Expose gdb_write_register function to consumers of gdbstub

From: novafacing This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h

[PATCH v4 9/9] plugins: Update plugin version and add notes

From: novafacing This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v5 2/9] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Signed-off-by: novafacing Signed-off-by: Rowan Hart

[PATCH v5 8/9] plugins: Remove use of qemu_plugin_read_register where it is not permitted

flags are enforced and qemu_plugin_read_register can no longer be called from a vcpu_init callback because it does not request the QEMU_PLUGIN_CB_ flag (nor does it have a mechanism to do so). Signed-off-by: Rowan Hart --- tests/tcg/plugins/insn.c | 22 +- 1 file changed, 1

[PATCH v5 3/9] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 30 ++ include/hw/core/cpu.h | 1 + include/qemu/plugin.h

[PATCH v5 6/9] plugins: Add patcher plugin and test

: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 302 ++ tests/tcg/x86_64/Makefile.softmmu-target | 32 ++- tests/tcg/x86_64/system/patch

[PATCH v5 0/9] Add additional plugin API functions to read and write memory and registers

rsions of these functions in the future if we change our minds! For v4, I've just updated the enforcement of the QEMU_PLUGIN_CB_ flags to just use immediate stores, which simplifies the implementation quite a lot and should be more efficient too. Thanks Pierrick for the suggestion!

[PATCH v5 7/9] plugins: Add hypercalls plugin and test

From: novafacing This patch adds a plugin that implements a simple form of hypercalls from guest code to the plugin by using the register read API. It accepts only one hypercall, which writes a magic value to guest memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg

[PATCH v5 5/9] plugins: Add memory hardware address read/write API

to permit a specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 93 plugins

[PATCH v5 4/9] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v6 4/9] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v5 9/9] plugins: Update plugin version and add notes

From: novafacing This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v6 8/9] plugins: Remove use of qemu_plugin_read_register where it is not permitted

flags are enforced and qemu_plugin_read_register can no longer be called from a vcpu_init callback because it does not request the QEMU_PLUGIN_CB_ flag (nor does it have a mechanism to do so). Signed-off-by: Rowan Hart --- tests/tcg/plugins/insn.c | 22 +- 1 file changed, 1

[PATCH v6 0/9] Add additional plugin API functions to read and write memory and registers

a formatting pass, I left some whitespace that needed removal, some license text was wrong, and so forth. Rowan Hart (2): plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks plugins: Remove use of qemu_plugin_read_register where it is not permitted nov

[PATCH v6 3/9] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 30 ++ include/hw/core/cpu.h | 1 + include/qemu/plugin.h

[PATCH v6 7/9] plugins: Add hypercalls plugin and test

From: novafacing This patch adds a plugin that implements a simple form of hypercalls from guest code to the plugin by using the register read API. It accepts only one hypercall, which writes a magic value to guest memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg

[PATCH v6 2/9] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Signed-off-by: novafacing Signed-off-by: Rowan Hart

[PATCH v6 9/9] plugins: Update plugin version and add notes

From: novafacing This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v6 1/9] gdbstub: Expose gdb_write_register function to consumers of gdbstub

From: novafacing This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h

[PATCH v6 6/9] plugins: Add patcher plugin and test

: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 297 ++ tests/tcg/x86_64/Makefile.softmmu-target | 32 ++- tests/tcg/x86_64/system/patch

[PATCH v5 1/9] gdbstub: Expose gdb_write_register function to consumers of gdbstub

From: novafacing This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- gdbstub/gdbstub.c | 2 +- include/exec/gdbstub.h

[PATCH v6 5/9] plugins: Add memory hardware address read/write API

to permit a specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 93 plugins

[PATCH v7 2/9] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Signed-off-by: novafacing Signed-off-by: Rowan Hart Reviewed

[PATCH v7 6/9] plugins: Add patcher plugin and test

: novafacing Signed-off-by: Rowan Hart --- tests/tcg/Makefile.target | 1 + tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 297 ++ tests/tcg/x86_64/Makefile.softmmu-target | 32 ++- tests/tcg/x86_64/system/patch

[PATCH v7 3/9] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 30 ++ include/hw/core/cpu.h | 1 + include/qemu/plugin.h

[PATCH v7 9/9] plugins: Update plugin version and add notes

From: novafacing This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v7 7/9] plugins: Add hypercalls plugin and test

From: novafacing This patch adds a plugin that implements a simple form of hypercalls from guest code to the plugin by using the register read API. It accepts only one hypercall, which writes a magic value to guest memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart --- tests/tcg

[PATCH v7 0/9] Add additional plugin API functions to read and write memory and registers

a formatting pass, I left some whitespace that needed removal, some license text was wrong, and so forth. Rowan Hart (2): plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks plugins: Remove use of qemu_plugin_read_register where it is not permitted nov

[PATCH v7 4/9] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Signed-off-by: novafacing Signed-off-by: Rowan Hart Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+)

[PATCH v7 8/9] plugins: Remove use of qemu_plugin_read_register where it is not permitted

flags are enforced and qemu_plugin_read_register can no longer be called from a vcpu_init callback because it does not request the QEMU_PLUGIN_CB_ flag (nor does it have a mechanism to do so). Signed-off-by: Rowan Hart --- tests/tcg/plugins/insn.c | 22 +- 1 file changed, 1

[PATCH v7 1/9] gdbstub: Expose gdb_write_register function to consumers of gdbstub

From: novafacing This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Signed-off-by: novafacing Signed-off-by: Rowan Hart Reviewed-by: Alex Benée Reviewed-by: Julian Ganz Reviewed

Re: [PATCH v7 3/9] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

@@ -437,6 +437,10 @@ int qemu_plugin_read_register(struct qemu_plugin_register *reg, GByteArray *buf)   {   g_assert(current_cpu);   +    if (qemu_plugin_get_cb_flags() == QEMU_PLUGIN_CB_NO_REGS) { +    return -1; +    } +   return gdb_read_register(current_cpu, buf, GPOINTER_TO_INT

[PATCH v7 5/9] plugins: Add memory hardware address read/write API

to permit a specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Signed-off-by: novafacing Signed-off-by: Rowan Hart Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu

[PATCH v13 4/7] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

[PATCH v13 6/7] plugins: Add patcher plugin and test

: Rowan Hart --- tests/tcg/Makefile.target | 7 +- tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 241 ++ tests/tcg/x86_64/Makefile.softmmu-target | 7 + tests/tcg/x86_64/system/patch-target.c| 22 ++ tests

[PATCH v13 2/7] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart

[PATCH v13 3/7] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 30 ++ include/hw/core/cpu.h

[PATCH v13 1/7] gdbstub: Expose gdb_write_register function to consumers of gdbstub

From: novafacing This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Reviewed-by: Alex Bennée Reviewed-by: Julian Ganz Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart

[PATCH v13 5/7] plugins: Add memory hardware address read/write API

to permit a specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 93

[PATCH v13 0/7] Add additional plugin API functions to read and write memory and registers

ch.so only runs with the patch test. Rowan Hart (1): plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks novafacing (6): gdbstub: Expose gdb_write_register function to consumers of gdbstub plugins: Add register write API plugins: Add memory virtual address write

[PATCH v13 7/7] plugins: Update plugin version and add notes

From: novafacing This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include

Re: [PATCH v12 0/7] Add additional plugin API functions to read and write memory and registers

I've updated this patch to address some notes about the build/test configuration for the patch plugin. Please check https://lore.kernel.org/qemu-devel/20250619161547.1401448-1-rowanbh...@gmail.com/T/#t instead. On 6/11/25 4:24 PM, Rowan Hart wrote: This patch series adds several ne

[PATCH v14 7/8] plugins: Add patcher plugin and test

-off-by: Rowan Hart --- tests/tcg/Makefile.target | 7 +- tests/tcg/plugins/meson.build | 2 +- tests/tcg/plugins/patch.c | 241 ++ tests/tcg/x86_64/Makefile.softmmu-target | 7 + tests/tcg/x86_64/system/patch-target.c| 22

[PATCH v14 8/8] plugins: Update plugin version and add notes

This patch updates the plugin version to gate new APIs and adds notes describing what has been added. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 9 - 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/qemu/qemu-plugin.h b

[PATCH v14 2/8] plugins: Add register write API

This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu

[PATCH v14 4/8] plugins: Add memory virtual address write API

ntext of the plugin. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h

[PATCH v14 6/8] tests/tcg: Remove copy-pasted notes and from i386 and add x86_64 system tests to tests

The x86_64-softmmu Makefile seems to have been copy-pasted from the i386 Makefile at some point in the past. Cleaning up a vestigial unused variable and removing some outdated comments. Signed-off-by: Rowan Hart --- tests/tcg/x86_64/Makefile.softmmu-target | 12 +--- 1 file changed, 5

[PATCH v14 5/8] plugins: Add memory hardware address read/write API

specified address space, for example to facilitate architecture-specific plugins that want to operate on them, for example reading ARM secure memory. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 93 plugins/api.c

Re: [PATCH v13 0/7] Add additional plugin API functions to read and write memory and registers

make[1]: *** No rule to make target 'patch-target', needed by 'run-plugin-patch-target-with-libpatch.so'. Stop. make: *** [/home/alex/lsrc/qemu.git/tests/Makefile.include:56: run-tcg-tests-x86_64-softmmu] Error 2 You need to ensure vpath is set, something like: Thanks for the note Alex.

[PATCH v14 3/8] plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks

functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- accel/tcg/plugin-gen.c | 30 ++ include/hw/core/cpu.h

[PATCH v14 1/8] gdbstub: Expose gdb_write_register function to consumers of gdbstub

This patch exposes the gdb_write_register function from gdbstub/gdbstub.c via the exec/gdbstub.h header file to support use in plugins to write register contents. Reviewed-by: Alex Bennée Reviewed-by: Julian Ganz Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- gdbstub/gdbstub.c

Re: [PATCH v12 5/7] plugins: Add memory hardware address read/write API

My main concern about the long list of caveats for writing memory is the user will almost certainly cause weird things to happen which will then be hard to debug. I can see the patcher example however it would be useful to know what other practical uses this interface provides. Of course! My main

[PATCH v10 2/8] plugins: Add register write API

From: novafacing This patch adds a function to the plugins API to allow plugins to write register contents. It also moves the qemu_plugin_read_register function so all the register-related functions are grouped together in the file. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart

[PATCH v10 4/8] plugins: Add memory virtual address write API

x27;t currently in the context of the plugin. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart --- include/qemu/qemu-plugin.h | 21 + plugins/api.c | 18 ++ 2 files changed, 39 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu

  1   2   >