Unicorn

Unicorn2 makes the first step to [Debian packages](https://tracker.debian.org/pkg/unicorn-engine) and [vcpkg](https://github.com/microsoft/vcpkg/pull/26101)! Thanks roehling and LilyWangL !

Features:

- Support building & running on BE hosts. 1710
- Fix and support `clang-cl` on Windows. 1687
- Fix python `sdist` and add aarch64 Linux wheels. Note `pip` can build Unicorn2 on M1 now!
- C binding is refined and upgraded to .Net 6. 1723

Fix/Improvements:

- Various bindings improvements. 1723
- Improvements for tests. 1684 1683 1691 1711
- Fail explicitly when VEX.L is set. 1658
- Fix endianness when writing PPC32 CR register. 1659
- Fix a bug in `uc_ctl_set_cpu_model` check.
- Fix Tricore PC not updating. 1668
- Fix the mapping not updated if users modify the mappings in the hooks.
- Handle pathological cases consistently. 1651
- Fix memory leaks in PPC target. 1680
- Fix memory leaks in Tricore target. 1681
- Fix MSVC handling in cmake. 1693
- Fix PC sync-ing problems for `UC_HOOK_BLOCK` hooks.
- Fix PC sync-ed twice when users request a soft restart.
- Prevent overflow with pre-allocated RAM blocks. 1712
- Add FPCR and FPSR registers 1722
- Fix ARM CPU state not deep copied.
- Fix PC not sync-ed for memory operation on aarch64.
- Exit invalid store operations early to avoid the target registers being overwritten.
- Improve the support for ARM BE32.

Thanks:

roehling LilyWangL mrexodia zachriggle Yu3H0 rhelmot relapids sh4w1 TSRBerry

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Unicorn2 first release candidate!

- Based on Qemu 5.0.1
- Remain backward compatible with Unicorn 1.x
- Update ISA of all existing architectures
- Support 2 new architectures in PowerPC & RISCV

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[Unicorn2-beta]: October 3rd, 2021

- Release Unicorn2 beta to public.
- New logo to celebrate this important milestone!

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- Properly handle selected-architecture build.
- Fix compilation issues on PPC & S390x.
- Fix a memory leak on uc_mem_protect().
- ARM:
- Support big-endian mode.
- Correct instruction size of Thumb/Thumb2 code.
- Support read/write APSR register.
- ARM64:
- Support read/write NEON registers.
- Support read/write NZCV registers.
- Mips: Support read/write Mips64 registers.
- X86: Support read/write MSR.
- Haskell binding: update to the latest API.
- Python: allow not having PATH setup.

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- Fix build script for BSD host.
- Fix building Unicorn on Arm/PPC/Sparc/S390 hosts.
- X86:
- Fix 16bit address computation.
- Fix initial state of segment registers.

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- Rename API uc_context_free() to uc_free().
- ARM:
- uc_reg_write() now can modify CPSR register.
- Add some ARM coproc registers.
- ARM64: uc_reg_read|write() now handles W0-W31 registers.
- Windows: fix a double free bug in uc_close().
- New VB6 binding.
- Java: update to support new APIs from v1.0-rc1.
- Python:
- Fix memory leaking that prevents UC instances from being GC.
- Remove some dependencies leftover from glib time.
- Add new method mem_regions() (linked to uc_mem_regions() API)

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- Remove glib & pkconfig dependency.
- Python: fix an issue to restore support for FreeBSD (and other *BSD Unix).
- ARM: support MCLASS cpu (Cortex-M3).
- Windows: export a static lib that can be used outside of Mingw

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