debug: add green-eye GSP/uproc RISC-V VM runtime analysis tooling

Adds open-iov/debug/risc-v-gsp-rm-vm: a GDB-free instrumentation stack that boots uproc/GSP firmware in qemu-system-riscv64 and provides Frida-like hooks, breakpoints, watchpoints, memory dumps, structure decoding, snapshot diffs, recorded sessions, declarative probes, a plugin API and a Ghidra symbol/hit bridge.

Verified: 25 tests green (including a live QEMU smoke test); the demo uproc boots with correct hook/leave/watch/schema/snapshot/fault evidence; the optional TCG trace plugin builds and recorded 15M trace lines in 3 s; the TU104 570.144 fwimage probe reports its first exception (load access fault at firmware vaddr 0x4009014 reading 0x2000000000000A00).

Documentation: lean tool docs under debug/risc-v-gsp-rm-vm/docs/00-10, a new docs/05-operations/03-risc-v-gsp-rm-vm.md debugging document, and '# TOOL IN DEVELOPMENT - NOT READY YET!' markers in docs/README.md, the onboarding tooling table and the debugging workflows doc.

Vendors qemu-plugin.h from QEMU v8.2.2 (GPL-2.0-or-later), with its license header intact, so the optional TCG plugin builds without a QEMU source tree.

1 files changed, 30 insertions, 0 deletions

diff --git a/debug/risc-v-gsp-rm-vm/greeneye/errors.py b/debug/risc-v-gsp-rm-vm/greeneye/errors.py
new file mode 100644
index 0000000..fab5874
--- /dev/null
+++ b/debug/risc-v-gsp-rm-vm/greeneye/errors.py
@@ -0,0 +1,30 @@
+"""green-eye error types. Keep them few and meaningful."""
+from __future__ import annotations
+
+
+class GreenEyeError(Exception):
+    """Base class for all green-eye errors."""
+
+
+class RspError(GreenEyeError):
+    """Base class for gdbstub RSP transport errors."""
+
+
+class RspTimeout(RspError):
+    """The stub did not answer within the timeout."""
+
+
+class RspProtocolError(RspError):
+    """The stub answered with a malformed packet or an error reply."""
+
+
+class TargetError(GreenEyeError):
+    """QEMU target lifecycle/configuration error."""
+
+
+class SymbolNotFound(GreenEyeError):
+    """A requested symbol is not in the symbol database."""
+
+
+class StructError(GreenEyeError):
+    """Structure schema/decode error."""