[0/9] Add RISC-V semihosting 0.2. Finish ARM semihosting 2.0

Message

Keith Packard Jan. 7, 2021, 5:07 p.m. UTC

This series adds support for RISC-V Semihosting, version 0.2 as
specified here:

	https://github.com/riscv/riscv-semihosting-spec/releases/tag/0.2

This specification references the ARM semihosting release 2.0 as
specified here:

	https://static.docs.arm.com/100863/0200/semihosting.pdf

That specification includes several semihosting calls which were not
previously implemented. This series includes implementations for the
remaining calls so that both RISC-V and ARM versions are now complete.

Tests for release 2.0 can be found in picolibc on the semihost-2.0-all
branch:

	https://github.com/picolibc/picolibc/tree/semihost-2.0-all

These tests uncovered a bug in the SYS_HEAPINFO implementation for
ARM, which has been fixed in this series as well.

The series is structured as follows:

 1. Move shared semihosting files
 2. Change public common semihosting APIs
 3. Change internal semihosting interfaces
 4. Fix SYS_HEAPINFO crash on ARM
 5-6. Add RISC-V semihosting implementation
 7-9. Add missing semihosting operations from release 2.0

Comments

Alex Bennée Jan. 8, 2021, 10:32 p.m. UTC | #1

Keith Packard <[e-mail]> writes:

> This series adds support for RISC-V Semihosting, version 0.2 as
> specified here:
>
> 	https://github.com/riscv/riscv-semihosting-spec/releases/tag/0.2
>
> This specification references the ARM semihosting release 2.0 as
> specified here:
>
> 	https://static.docs.arm.com/100863/0200/semihosting.pdf
>
> That specification includes several semihosting calls which were not
> previously implemented. This series includes implementations for the
> remaining calls so that both RISC-V and ARM versions are now complete.
>
> Tests for release 2.0 can be found in picolibc on the semihost-2.0-all
> branch:
>
> 	https://github.com/picolibc/picolibc/tree/semihost-2.0-all
>
> These tests uncovered a bug in the SYS_HEAPINFO implementation for
> ARM, which has been fixed in this series as well.
>
> The series is structured as follows:
>
>  1. Move shared semihosting files
>  2. Change public common semihosting APIs
>  3. Change internal semihosting interfaces
>  4. Fix SYS_HEAPINFO crash on ARM
>  5-6. Add RISC-V semihosting implementation
>  7-9. Add missing semihosting operations from release 2.0

Queued to semihosting/next, thanks.