Jiri Kastner cz172638

RISC-V Debug Module Implementation

This gist discusses implementation of a Debug Module (DM) primarily per RISC-V Debug Specification v0.11. The core ideas, though, apply to Debug Specification v0.13. Information presented here come from various sources, but mostly from Debug Specs, riscv-isa-sim and from reverse engineering e200_opensource. Relevant source of information is also riscv-openocd.

General Discussion

RV Debug Task Group

RISC-V Foundation established a debug task group to propose and standardize mechanisms for external debugging of RISC-V (RV) cores. This effort resulted in drafting a RISC-V External Debug Supprt specification, early [v0.1

Honda OBDlink SX notes 2015-08-19

My OBDLink SX data:

>AT I
ELM327 v1.3a
>ST DI (HARDWARE ID STRING)
OBDLink SX r4.2
&gt;ST I (FIRMARE ID STRING)

	reword 0e47d9c asdf
	squash 3ac11d1 asdf
	pick d36076e Intriguing!
	pick 49ebfed Policy.
	pick 9d2983b Adding a 404 error page.
	pick edfbc9c Adding hackish search index.
	pick 48b5273 site map, json search index and addition to header
	pick 201827e made help index prettier.
	squash bac9c44 I broke it
	squash 839a5e1 I broke it still

	#!/bin/sh
	# Convert a raw binary image into an ELF file suitable for loading into a disassembler

	cat > raw$$.ld <<EOF
	SECTIONS
	{
	EOF

	echo " . = $3;" >> raw$$.ld

	tr < file-with-nulls -d '\000' > file-without-nulls

	sed 's/\x0//g' file-with-nulls > file-without-nulls

	sed 's/\x0/ /g' file-with-nulls > file-without-nulls

	grep -P '\000' < file-with-nulls >file-without-nulls

	awk '/\000/ { print }'

	from os import chdir, getcwd
	from os.path import realpath

	class PushdContext:
	cwd = None
	original_dir = None

	def __init__(self, dirname):
	self.cwd = realpath(dirname)