SUMMARY ======= This patch-set introduces the first version of the mcdstub. The mcdstub is a debug interface, which enables debugging QEMU using the MCD (Multi-Core Debug) API. The mcdstub uses TCP to communicate with the host debug software. However, because MCD is merely an API, the TCP communication is not part of the MCD spec but specific to this project.
To translate between the MCD API and the TCP data stream coming from the mcdstub, the host has to use a shared library (.dll/.so). Such a shared library is available at: https://gitlab.com/lauterbach/mcdrefsrv The MCD API itself can be downloaded here: https://repo.lauterbach.com/sprint_mcd_api_v1_0.zip QUICK START =========== Attention: MCD is currently only supported for qemu-system-arm ! Three components are required to Debug QEMU via MCD: 1. qemu-system-arm (built with this patch series applied). 2. MCD shared library (translates between the MCD API and TCP data). 3. Host debugging software with support for the MCD API (e.g. Lauterbach TRACE32). To activate the mcdstub, just use the "mcd" launch option in combination with a TCP port. With the default TCP port 1235: $ qemu-system-arm -M virt -cpu cortex-a15 -mcd default With a custom TCP port: $ qemu-system-arm -M virt -cpu cortex-a15 -mcd tcp::1235 QEMU will listen for an MCD host to connect to the specified port. IMPORTANT CHANGES ================= 1. DebugClass: This patch-set introduces the DebugClass to the QOM, which is used to abstract GDB/MCD specific debugger details. It is declared in include/qemu/debug.h, defined in debug/common/debug.c It currently only offers one function: set_stop_cpu, which gets called in cpu_handle_guest_debug in softmmu/cpus.c. In the future, other functions could be moved from the mcd/gdbstub to the DebugClass. 2. mcd launch option: This patch-set introduces the mcd launch option to QEMU. The quick start section describes how to use it. 3. MCD debugging features: * Go, break, step * Read/write memory (user space only) * Read/write registers (GPR and CP) * Set breakpoints and watchpoints. ================= Signed-off-by: Nicolas Eder <nicolas.e...@lauterbach.com> Nicolas Eder (17): gdbstub, mcdstub: file and build structure adapted to accomodate for the mcdstub gdbstub: hex conversion functions moved to cutils.h gdbstub: GDBRegisterState moved to gdbstub.h so it can be used outside of the gdbstub gdbstub: DebugClass added to system mode. mcdstub: memory helper functions added mcdstub: -mcd start option added, mcd specific defines added mcdstub: mcdserver initialization functions added cutils: qemu_strtou32 function added mcdstub: TCP packet plumbing added mcdstub: open and close server funcitons added mcdstub: system and core queries added mcdstub: all core specific queries added mcdstub: go, step and break added mcdstub: state query added mcdstub: skeleton for reset handling added mcdstub: register access added mcdstub: break/watchpoints added MAINTAINERS | 11 +- debug/common/debug.c | 51 + debug/common/meson.build | 1 + {gdbstub => debug/gdbstub}/gdbstub.c | 27 +- {gdbstub => debug/gdbstub}/internals.h | 26 - {gdbstub => debug/gdbstub}/meson.build | 0 {gdbstub => debug/gdbstub}/syscalls.c | 0 {gdbstub => debug/gdbstub}/system.c | 18 + {gdbstub => debug/gdbstub}/trace-events | 0 debug/gdbstub/trace.h | 1 + {gdbstub => debug/gdbstub}/user-target.c | 0 {gdbstub => debug/gdbstub}/user.c | 0 debug/mcdstub/arm_mcdstub.c | 289 +++ debug/mcdstub/mcdstub.c | 2494 ++++++++++++++++++++++ debug/mcdstub/meson.build | 12 + debug/meson.build | 3 + gdbstub/trace.h | 1 - include/exec/cpu-common.h | 3 + include/exec/gdbstub.h | 8 + include/exec/memory.h | 9 + include/hw/boards.h | 1 + include/mcdstub/arm_mcdstub.h | 118 + include/mcdstub/mcd_shared_defines.h | 132 ++ include/mcdstub/mcdstub.h | 165 ++ include/mcdstub/mcdstub_common.h | 83 + include/qemu/cutils.h | 32 + include/qemu/debug.h | 38 + include/qemu/typedefs.h | 2 + meson.build | 4 +- qemu-options.hx | 18 + system/cpus.c | 9 +- system/memory.c | 11 + system/physmem.c | 26 + system/vl.c | 13 + util/cutils.c | 30 + 35 files changed, 3588 insertions(+), 48 deletions(-) create mode 100644 debug/common/debug.c create mode 100644 debug/common/meson.build rename {gdbstub => debug/gdbstub}/gdbstub.c (98%) rename {gdbstub => debug/gdbstub}/internals.h (92%) rename {gdbstub => debug/gdbstub}/meson.build (100%) rename {gdbstub => debug/gdbstub}/syscalls.c (100%) rename {gdbstub => debug/gdbstub}/system.c (97%) rename {gdbstub => debug/gdbstub}/trace-events (100%) create mode 100644 debug/gdbstub/trace.h rename {gdbstub => debug/gdbstub}/user-target.c (100%) rename {gdbstub => debug/gdbstub}/user.c (100%) create mode 100644 debug/mcdstub/arm_mcdstub.c create mode 100644 debug/mcdstub/mcdstub.c create mode 100644 debug/mcdstub/meson.build create mode 100644 debug/meson.build delete mode 100644 gdbstub/trace.h create mode 100644 include/mcdstub/arm_mcdstub.h create mode 100644 include/mcdstub/mcd_shared_defines.h create mode 100644 include/mcdstub/mcdstub.h create mode 100644 include/mcdstub/mcdstub_common.h create mode 100644 include/qemu/debug.h -- 2.34.1
