[PATCH v4 0/2] linux-user: introduce syscall-filter plugin API

[Ziyang Zhang <functioner@sjtu.edu.cn>]

We choose a smaller magic syscall number to avoid the illegal instruction
exception [1] on qemu-arm.

PATCH v4:
  1. Modify some comments

PATCH v3:
  1. Change to a smaller magic syscall number and add comments
  2. Set register flags out of the for-loop

PATCH v2:
  1. Rebased on newest version of master

PATCH v1:
  1. Format the code

RFC v2:
  1. Simplify the syscall filter mechanism and remove fork-cpu
  2. Add QEMU_PLUGIN_EV_VCPU_SYSCALL_FILTER enum

RFC v1:
  1. Add syscall filter registry
  2. Add fork-cpu interface to re-enter cpu_loop when handling syscalls

Ziyang Zhang (2):
  linux-user: add plugin API to filter syscalls
  tcg tests: add a test to verify the syscall filter plugin API

 include/qemu/plugin-event.h                   |  1 +
 include/qemu/plugin.h                         | 33 ++++++++++++-----
 include/qemu/qemu-plugin.h                    | 32 ++++++++++++++++
 include/user/syscall-trace.h                  | 17 +++++++++
 linux-user/syscall.c                          |  7 +++-
 plugins/api.c                                 |  7 ++++
 plugins/core.c                                | 37 +++++++++++++++++++
 tests/tcg/multiarch/Makefile.target           |  4 +-
 .../multiarch/test-plugin-syscall-filter.c    | 35 ++++++++++++++++++
 tests/tcg/plugins/syscall.c                   | 19 ++++++++++
 10 files changed, 180 insertions(+), 12 deletions(-)
 create mode 100644 tests/tcg/multiarch/test-plugin-syscall-filter.c

-- 
2.34.1