feat(verify): ABI checks on arm64, riscv64 and loong64

Assisted-by: GLM 5.3 Flash

CHANGELOG.md

@@ -27,6 +27,16 @@ Unreleased changes on the `development` branch.
   architectures via hand-written assembly trampolines
   (`trampoline_{arm64,riscv64,loong64}.s`) that save the Go stack, switch
   to a prepared stack, and branch to the JIT function.
+- **ABI checks on all architectures.**  `gasm verify -abi` and the ABI
+  half of `-fuzz` now work on arm64, riscv64 and loong64 via
+  per-architecture checked trampolines: sentinels planted in the
+  registers the Go ABI fixes across calls (amd64 `BP`/`R14`, arm64
+  `R29`/`R28`, riscv64 `X27`, loong64 `R22`) are verified on return, with
+  the below-SP canary on every architecture.  `gasm verify` now runs the
+  JIT checks whenever the host matches the kernel's architecture, and
+  takes the ground-truth-only path only on other hosts.  The `ABIReport`
+  fields are renamed to the architecture-neutral `FPClobbered` and
+  `GClobbered`.
 - **Hardware watchpoints on all architectures.**  arm64 uses DBGWVR/DBGWCR
   via `PTRACE_SETREGSET` with `NT_ARM_HW_BREAK`; riscv64 and loong64 use
   `PTRACE_POKEUSER` to access trigger/debug registers.