Hardware single stepping is not currently supported by the linux kernel.
In order to support single step debugging, add EmulateInstructionLoongArch
to implement the software Single Stepping. This patch only support the
simplest single step execution of non-jump instructions.
Reviewed By: SixWeining, DavidSpickett
Differential Revision: https://reviews.llvm.org/D139158
Add:
- `EmulateInstructionRISCV`, which can be used for riscv32 and riscv64.
- Add unittests for EmulateInstructionRISCV.
Note: Compressed instructions set (RVC) was still not supported in this patch.
Reviewed By: DavidSpickett
Differential Revision: https://reviews.llvm.org/D131759
Some architectures do not have a flag register (like riscv).
In this case, we should set it to `baton.m_register_values.end()` to avoid nullptr exception.
Reviewed By: DavidSpickett
Differential Revision: https://reviews.llvm.org/D131945
Introduce mips64 support to match the legacy FreeBSD plugin. Similarly
to the legacy plugin, the code does not support FPU registers at the
moment. The support for them will be submitted separately as it
requires changes to the register context shared by both plugins.
This also includes software single-stepping support that is moved from
the Linux plugin into a common Utility class. The FreeBSD code also
starts explicitly ignoring EINVAL from PT_CLEARSTEP since this is easier
to implement than checking whether hardware single-stepping were used.
Differential Revision: https://reviews.llvm.org/D95802
