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• v0.29.0 30c53565a7

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  v0.29.0 Stable

  petrbalvin released this 2026-08-07 19:34:09 +00:00 | 221 commits to main since this release

  RISC-V GOOBJ emission, YMM vector register display, named buffer allocation
  in the debugger, two new CLI commands (diff, profile), go-to-definition in
  the LSP, combined ABI+fuzz verification, and did-you-mean label suggestions.
  A --map flag for diff and --call/--buf flags for verify extend the
  new CLI commands. A signature-parser fix corrects grouped Go parameters.

  Added

  • RISC-V GOOBJ emission — gasm asm --format goobj for RISC-V produces
    linkable Go objects with funcdata, pc-value tables, and RISC-V relocation
    types (same format as amd64 GOOBJ, with the RISC-V architecture marker).
  • gasm diff — compare the machine code of two assembly files byte-for-byte;
    shows which functions differ and the first few differing bytes.
  • gasm profile — show the basic-block structure of each function: labels,
    offsets, frame size, and NOSPLIT flag.
  • LSP go-to-definition — textDocument/definition navigates from a label
    reference to its definition.
  • did-you-mean — when the RISC-V assembler encounters an undefined label, it
    suggests the closest existing label using Levenshtein distance.
  • YMM vector register display — regs in the debugger now shows YMM
    registers via PTRACE_GETFPREGS (falls back to XMM when XSAVE is unavailable).
  • Named buffer allocation — gasm debug --buf name:size:pattern allocates
    buffers in the debuggee filled with zero, ones, seq, or a hex pattern;
    buffer pointers are placed into the argument block at the matching positions.
  • Crash input storage — FuzzResult.CrashInput stores the input that caused
    a crash or mismatch for reproducibility.
  • ABI + fuzz combined — gasm verify --fuzz now runs ABI checks (sentinel
    registers, canary, stack bounds) alongside differential fuzz testing.
  • gasm diff --map — compare functions whose names differ between files
    (e.g. --map wideCopyAVX2=wideCopyAVX512 pairs two variants regardless
    of suffix). Unmapped functions fall back to the original name match.
  • gasm verify --call — invoke a single function with user-supplied buffers
    (--buf name:size:pattern) instead of the smoke/abi/fuzz sweeps. Patterns:
    zero, ones, seq, or a hex blob. Useful for partial functions (e.g.
    decoders) that crash on random input but should succeed on valid data.
    The arg block is printed before and after the call, showing return values.
  • gasm verify --ground-truth now documented in --help (was already a flag,
    just missing from the help text).

  Fixed

  • Signature parser — grouped Go parameters like dst, src []byte are now
    parsed correctly (both get type []byte). Previously the first name was
    treated as its own type (dst with size 8), causing wrong ABI0 arg-block
    layout in both verify --call and the fuzzer.
  • Flaky JIT tests — runtime.KeepAlive guards and package-level buffers
    prevent GC from collecting heap objects whose addresses were passed to JIT
    code via unsafe.Pointer; all verify tests pass 100/100 under -race.

  Cleaned up

  • Removed external kernel test dependencies — the verify test suite no
    longer references production kernels from the separate go-libraries project.
    The remaining test suite uses only testdata/verify/*.s kernels, which are
    part of this repository. Coverage is identical locally and in CI (80.3 %).

  Verified

  • gasm diff detects byte-level differences; --map pairs differently-named
    functions for comparison.
  • gasm verify --call invokes functions with user-supplied buffers; the arg
    block is printed before and after the call, showing return values.
  • LSP go-to-definition resolves labels across functions and files.

  Downloads

  • gasm-0.29.0-linux-amd64
    4.4 MiB

    2026-08-07 19:40:56 +00:00
  • gasm-0.29.0-linux-arm64
    3.7 MiB

    2026-08-07 19:40:56 +00:00
  • gasm-0.29.0-linux-loong64
    3.9 MiB

    2026-08-07 19:40:56 +00:00
  • gasm-0.29.0-linux-riscv64
    3.5 MiB

    2026-08-07 19:40:56 +00:00
  • Source Code (ZIP)
  • Source Code (TAR.GZ)