GDB in prebuilt pulp toolchain lack of tui support

[ericsunplus]

Bug Title

GDB in prebuilt pulp toolchain lack to tui support

Type

• Toolchain

Description

I used the riscv32-unknown-elf-gdb in suggested Embecosm PULP GCC toolchain to connect to a cv32e40p FPGA. The debugging can work, but it is lacking of tui support so can't achieve interactive debugging

$ riscv32-unknown-elf-gdb --tui build/bubble/bubble
riscv32-unknown-elf-gdb: TUI mode is not supported

I build my own toolchain from pulp-riscv-gnu-toolchain, the tui mode is supported, however when I try to connect to target, there is a segmentation fault reported. Seems some patch/extra-configuration are needed for general toolchain to support cv32e40p.

Can tui mode be added in pre-built toolchain, or instruction can be given on how to build cv32e40p toolchain by ourselves.

[jeremybennett]

@zarubaf I don't have the right permissions, but this needs to be assigned to @jessicamills as GNU tools lead.

The Embecosm public build bot includes the scripts for building and testing the tool chain from source.

[MikeOpenHWGroup]

Picking up this stale issue.

@jessicamills is not able to access this repo - I have sent her an invite. It is my understanding that Jessica is off until 2021-11-15.

[jeremybennett]

I've asked @simonpcook, who is responsible for the pre-built tool chains, if we can enable TUI support. The original use case for the tool chains was Eclipse, for which TUI is irrelevant.