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

From: Keith Packard
Subject: [PATCH 0/9] Add RISC-V semihosting 0.2. Finish ARM semihosting 2.0
Date: Thu, 7 Jan 2021 09:07:08 -0800

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


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


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


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

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