Provides the ability for the guest to communicate with user-provided code inside
QEMU itself, using a lightweight mechanism.
See first commit for a full description.
Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
---
Changes in v2:
* Rebase on 1c8a881daaca6fe0646a425b0970fb3ad25f6732 from master.
* Multiple documentation fixes and clarifications.
* Fixed a couple of bugs when freeing memory.
* Actually call 'backdoor_fini' in user mode when exiting.
* Try to auto-detect the backdoor device in the example guest library when
running a full-system linux.
* Rewrite code to read and write into the control channel in softmmu mode,
making it much clearer and leaving endianness handling up to the user-provided
backdoor callbacks.
Lluís Vilanova (5):
backdoor: Add documentation
backdoor: Add build infrastructure
backdoor: [*-user] Add QEMU-side proxy to "libbackdoor.a"
backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a"
backdoor: Add guest-side library
Makefile | 4 +
Makefile.objs | 21 ++++
Makefile.target | 4 +
backdoor/guest/Makefile | 18 ++++
backdoor/guest/common.c | 205 ++++++++++++++++++++++++++++++++++++++++
backdoor/guest/qemu-backdoor.h | 59 ++++++++++++
backdoor/qemu/qemu-backdoor.h | 31 ++++++
backdoor/qemu/softmmu.c | 186 ++++++++++++++++++++++++++++++++++++
backdoor/qemu/user.c | 202 +++++++++++++++++++++++++++++++++++++++
backdoor/qemu/user.h | 30 ++++++
bsd-user/main.c | 26 +++++
bsd-user/mmap.c | 7 +
bsd-user/syscall.c | 13 +++
configure | 35 +++++++
darwin-user/main.c | 26 +++++
darwin-user/mmap.c | 7 +
docs/backdoor.txt | 167 +++++++++++++++++++++++++++++++++
hw/pci.h | 1
linux-user/main.c | 32 ++++++
linux-user/mmap.c | 7 +
linux-user/syscall.c | 10 ++
21 files changed, 1089 insertions(+), 2 deletions(-)
create mode 100644 backdoor/guest/Makefile
create mode 100644 backdoor/guest/common.c
create mode 100644 backdoor/guest/qemu-backdoor.h
create mode 100644 backdoor/qemu/qemu-backdoor.h
create mode 100644 backdoor/qemu/softmmu.c
create mode 100644 backdoor/qemu/user.c
create mode 100644 backdoor/qemu/user.h
create mode 100644 docs/backdoor.txt
