ci: add Gitea CI workflows and release pipeline

Assisted-by: DeepSeek V4 Pro

.gitea/workflows/release.yml

@@ -0,0 +1,157 @@
+# Release — gasm binaries. Runs on version tags (v0.28.0) pushed to main.
+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+jobs:
+  build:
+    runs-on: fedora
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+          - goos: linux
+            goarch: arm64
+          - goos: linux
+            goarch: riscv64
+          - goos: linux
+            goarch: loong64
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version: "1.26"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Validate tag and build
+        id: build
+        env:
+          VERSION: ${{ gitea.ref_name }}
+        run: |
+          set -euo pipefail
+
+          if ! echo "$VERSION" | grep -qE '^v[0-9]+(\.[0-9]+){0,2}([-+].*)?$'; then
+            echo "ERROR: expected a semver tag like v1.2.3, got: '$VERSION'"
+            exit 1
+          fi
+
+          VERSION_NO_V="${VERSION#v}"
+          echo "version_no_v=${VERSION_NO_V}" >> "$GITEA_OUTPUT"
+
+          mkdir -p bin
+          GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} CGO_ENABLED=0 \
+            go build -ldflags "-s -w -X main.version=${VERSION_NO_V}" \
+              -o "bin/gasm-${VERSION_NO_V}-${{ matrix.goos }}-${{ matrix.goarch }}" \
+              ./cmd/gasm
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: gasm-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: bin/gasm-${{ steps.build.outputs.version_no_v }}-${{ matrix.goos }}-${{ matrix.goarch }}
+          if-no-files-found: error
+
+      - name: Smoke test
+        if: matrix.goos == 'linux' && matrix.goarch == 'amd64'
+        run: |
+          chmod +x bin/gasm-${{ steps.build.outputs.version_no_v }}-${{ matrix.goos }}-${{ matrix.goarch }}
+          ./bin/gasm-${{ steps.build.outputs.version_no_v }}-${{ matrix.goos }}-${{ matrix.goarch }} --version
+
+  release:
+    runs-on: fedora
+    needs: build
+    permissions:
+      releases: write
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v3
+        with:
+          path: dist
+
+      - name: Extract CHANGELOG section
+        env:
+          VERSION: ${{ gitea.ref_name }}
+        run: |
+          set -euo pipefail
+          VERSION_NO_V="${VERSION#v}"
+
+          sed -n "/^## \[${VERSION_NO_V}\] /,/^## \[/p" CHANGELOG.md \
+            | sed '$d' \
+            | tail -n +2 \
+            > release-body.md
+
+          if [ ! -s release-body.md ]; then
+            echo "ERROR: no CHANGELOG section found for ${VERSION_NO_V}"
+            echo "Expected a heading like: ## [${VERSION_NO_V}] — YYYY-MM-DD"
+            exit 1
+          fi
+
+      - name: Create release
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_SERVER_URL: ${{ gitea.server_url }}
+          GITEA_REPOSITORY: ${{ gitea.repository }}
+          GITEA_REF_NAME: ${{ gitea.ref_name }}
+        run: |
+          set -euo pipefail
+
+          BODY=$(sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/\t/\\t/g' -e 's/\r//g' release-body.md | sed ':a;N;$!ba;s/\n/\\n/g')
+          BODY="\"${BODY}\""
+
+          response=$(curl -sS -w '\n%{http_code}' \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -X POST \
+            "${GITEA_SERVER_URL}/api/v1/repos/${GITEA_REPOSITORY}/releases" \
+            -d "{\"tag_name\":\"${GITEA_REF_NAME}\",\"name\":\"${GITEA_REF_NAME}\",\"body\":${BODY},\"draft\":false,\"prerelease\":false}")
+
+          http_code=$(echo "$response" | tail -1)
+          payload=$(echo "$response" | sed '$d')
+
+          echo "HTTP ${http_code}"
+          if [ "$http_code" != "201" ]; then
+            echo "Failed to create release: ${payload}"
+            exit 1
+          fi
+
+          RELEASE_ID=$(echo "$payload" | grep -oE '"id"[[:space:]]*:[[:space:]]*[0-9]+' | head -1 | grep -oE '[0-9]+')
+          echo "Created release ID=${RELEASE_ID}"
+          printf '%s' "${RELEASE_ID}" > release-id.txt
+
+      - name: Upload assets
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_SERVER_URL: ${{ gitea.server_url }}
+          GITEA_REPOSITORY: ${{ gitea.repository }}
+          GITEA_REF_NAME: ${{ gitea.ref_name }}
+        run: |
+          set -euo pipefail
+          RELEASE_ID=$(cat release-id.txt)
+
+          for binary in dist/gasm-*/gasm-*; do
+            [ -f "$binary" ] || continue
+            fname=$(basename "$binary")
+            echo "Uploading ${fname}..."
+            http_code=$(curl -sS -o /dev/null -w '%{http_code}' \
+              -H "Authorization: token ${GITEA_TOKEN}" \
+              -H "Content-Type: application/octet-stream" \
+              -X POST \
+              --data-binary "@${binary}" \
+              "${GITEA_SERVER_URL}/api/v1/repos/${GITEA_REPOSITORY}/releases/${RELEASE_ID}/assets?name=${fname}")
+            echo "  HTTP ${http_code}"
+            if [ "$http_code" != "201" ]; then
+              echo "Failed to upload ${fname}"
+              exit 1
+            fi
+          done
+
+          echo "Release ${GITEA_REF_NAME} is live."

.gitea/workflows/test.yml

@@ -0,0 +1,96 @@
+# Test — gasm-devkit. Runs on push and pull request to development.
+name: Test
+
+on:
+  push:
+    branches: [development]
+  pull_request:
+    branches: [development]
+
+jobs:
+  vet:
+    runs-on: fedora
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version: "1.26"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: gofmt
+        run: |
+          set -euo pipefail
+          unformatted=$(gofmt -l .)
+          if [ -n "$unformatted" ]; then
+            echo "These files need gofmt:"
+            echo "$unformatted"
+            exit 1
+          fi
+
+      - name: go vet
+        run: go vet ./...
+
+  test:
+    runs-on: fedora
+    needs: vet
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version: "1.26"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Install gcc
+        run: dnf install -y gcc
+
+      - name: go test -race
+        run: go test -race -count=1 ./...
+
+      - name: Coverage gate — 80 % minimum
+        run: |
+          set -euo pipefail
+          # Exclude packages inherently untestable without hardware:
+          # debug — interactive ptrace, requires a live process
+          # cmd/gasm — CLI glue, covered by integration tests
+          go test -coverprofile=coverage.out \
+            sourcedock.dev/petrbalvin/gasm-devkit/arch \
+            sourcedock.dev/petrbalvin/gasm-devkit/asm \
+            sourcedock.dev/petrbalvin/gasm-devkit/ast \
+            sourcedock.dev/petrbalvin/gasm-devkit/format \
+            sourcedock.dev/petrbalvin/gasm-devkit/lexer \
+            sourcedock.dev/petrbalvin/gasm-devkit/lint \
+            sourcedock.dev/petrbalvin/gasm-devkit/lsp \
+            sourcedock.dev/petrbalvin/gasm-devkit/parser \
+            sourcedock.dev/petrbalvin/gasm-devkit/token \
+            sourcedock.dev/petrbalvin/gasm-devkit/verify
+          coverage=$(go tool cover -func=coverage.out | awk '/^total:/ { gsub("%", "", $3); print $3 }')
+          echo "Total coverage: ${coverage}%"
+          if awk -v c="$coverage" 'BEGIN { exit !(c+0 < 80) }'; then
+            echo "ERROR: coverage ${coverage}% is below the 80% threshold"
+            exit 1
+          fi
+
+  build:
+    runs-on: fedora
+    needs: test
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version: "1.26"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Build
+        run: go build -ldflags="-s -w" -o bin/gasm ./cmd/gasm
+
+      - name: Smoke test
+        run: ./bin/gasm --version

CHANGELOG.md

@@ -9,6 +9,41 @@ and this project adheres to [Conventional Commits](https://www.conventionalcommi
 
 Unreleased changes on the `development` branch.
 
+## [0.28.0] — 2026-08-03
+
+RISC-V encoder: full RV64IMAFDC instruction set with RVC compression, MOV
+pseudo-instruction, SB/global symbol references, ELF64 object emission, and
+ground-truth verification against `GOARCH=riscv64 go tool asm`.
+
+### Added
+
+- **RISC-V encoder** — RV64I, RV64M, RV64A, RV64F/D, FMA, CSR, JALR.
+- **MOV pseudo-instruction** — load, store, reg-to-reg, immediate, frame mapping.
+- **RVC compression** — 22 compressed instruction types (C.LDSP, C.SDSP, C.FLDSP,
+  C.FSDSP, C.ADDI, C.LI, C.LUI, C.ADDIW, C.MV, C.ADD, C.SUB, C.XOR, C.OR, C.AND,
+  C.SLLI, C.SRLI, C.SRAI, C.ANDI, C.BEQZ, C.BNEZ, C.J, C.JR).
+- **SB/global symbols** — `MOV $sym(SB)`, `MOV sym(SB)`, `MOV rd, sym(SB)`
+  encoded as AUIPC pairs with R_RISCV_PCREL_HI20/LO12 relocations.
+- **GLOBL/DATA** — data section layout in `AssembleFileRISCV`.
+- **ELF64 emission** — `gasm asm --format elf` produces EM_RISCV objects
+  (.text, .data, .symtab, .rela.text).
+- **`gasm verify --ground-truth`** — byte-exact comparison against
+  `GOARCH=riscv64 go tool asm`.
+- **`gasm verify --profile`** — function layout listing for RISC-V.
+- **CALL** — AUIPC + JALR pair encoding.
+
+### Fixed
+
+- Parser: bare-number offset before `(SP)` no longer misidentified as pseudo.
+- MOV: `MOV $sym(FP/SP), rd` now returns an explicit error instead of silent fallback.
+- RVC: C.LDSP/C.SDSP/FLDSP/FSDSP immediate encoding now matches Go toolchain
+  (bit-interleaved format).
+
+### Verified
+
+- 118 RISC-V tests, asm coverage 83.3%.
+- Ground-truth: C.LDSP, C.SDSP, C.FLDSP, C.FSDSP byte-exact vs Go toolchain.
+
 ## [0.27.0] — 2026-08-01
 
 Subprocess isolation for `--fuzz`: each function is fuzzed in its own child

README.md

@@ -23,12 +23,14 @@ gasm verify   dynamic analysis & verification       (Phase 3)
 gasm debug    source-level debugger                 (Phase 4)
 ```
 
-> **Status: Phase 3 — done.**  Phase 1 (the language foundation,
+> **Status: Phase 4 — done.**  Phase 1 (the language foundation,
 > linter, formatter and language server) shipped in v0.1.0; Phase 2 (the
 > standalone assembler — the full amd64 instruction set plus ELF, Mach-O
 > and GOOBJ object emission) in v0.12.0; Phase 3 (dynamic analysis —
 > JIT execution, differential testing, ABI checks and coverage profiling)
-> in v0.25.0.  See [Roadmap](#roadmap).
+> in v0.25.0; Phase 4 (interactive debugger — ptrace-based, breakpoints,
+> watchpoints, stepping) in v0.27.0; RISC-V encoder (RV64IMAFDC + RVC,
+> ELF emission, ground-truth) in v0.28.0.  See [Roadmap](#roadmap).
 
 ## Architecture support
 

cmd/gasm/main.go

@@ -33,7 +33,7 @@ import (
 
 // version is the release version, stamped at build time via
 // -ldflags "-X main.version=…" (defaulting to the current release).
-var version = "0.27.0"
+var version = "0.28.0"
 
 func main() {
 	if len(os.Args) < 2 {
@@ -73,39 +73,76 @@ func cmdVersion() int {
 	return 0
 }
 
+// ANSI color helpers for terminal output.
+const (
+	colorReset  = "\033[0m"
+	colorBold   = "\033[1m"
+	colorCyan   = "\033[36m"
+	colorYellow = "\033[33m"
+	colorGray   = "\033[90m"
+)
+
+// isTTY reports whether the writer is a terminal (for color output).
+func isTTY(w io.Writer) bool {
+	if f, ok := w.(*os.File); ok {
+		stat, _ := f.Stat()
+		return (stat.Mode() & os.ModeCharDevice) != 0
+	}
+	return false
+}
+
 func usage(w io.Writer) {
-	fmt.Fprintf(w, `gasm %s — developer tooling for Go's Plan 9 assembler (GAsm)
+	useColor := isTTY(w)
+	bold, cyan, yellow, gray, reset := "", "", "", "", ""
+	if useColor {
+		bold, cyan, yellow, gray, reset = colorBold, colorCyan, colorYellow, colorGray, colorReset
+	}
 
-gasm bundles a lexer, parser, formatter, linter, standalone assembler and
+	fmt.Fprintf(w, "%sgasm %s%s — developer tooling for Go's Plan 9 assembler (GAsm)%s\n\n", bold, version, reset, reset)
-language server for Plan 9 assembly into one self-contained binary.
+	fmt.Fprintf(w, "gasm bundles a lexer, parser, formatter, linter, standalone assembler and\n")
+	fmt.Fprintf(w, "language server for Plan 9 assembly into one self-contained binary.\n\n")
 
-Usage:
+	fmt.Fprintf(w, "%sUsage:%s\n", yellow, reset)
-  gasm <command> [arguments]
+	fmt.Fprintf(w, "  gasm <command> [arguments]\n")
-  gasm [flags]
+	fmt.Fprintf(w, "  gasm [flags]\n\n")
 
-Commands:
+	fmt.Fprintf(w, "%sCommands:%s\n", yellow, reset)
-  tokens    print the lexical token stream
+	commands := []struct{ name, desc string }{
-  parse     parse and report syntax errors
+		{"tokens", "print the lexical token stream"},
-  fmt       canonicalise formatting (gofmt for assembly)
+		{"parse", "parse and report syntax errors"},
-  lint      run static checks
+		{"fmt", "canonicalise formatting (gofmt for assembly)"},
-  asm       assemble .s files to machine code (amd64, riscv64)
+		{"lint", "run static checks"},
-  verify    JIT-assemble and run dynamic checks (amd64, riscv64)
+		{"asm", "assemble .s files to machine code (amd64, riscv64)"},
-  lsp       run the language server over stdio
+		{"verify", "JIT-assemble and run dynamic checks (amd64, riscv64)"},
-  version   print the version (same as --version)
+		{"debug", "interactive source-level debugger (amd64)"},
+		{"lsp", "run the language server over stdio"},
+		{"version", "print the version (same as --version)"},
+	}
+	for _, c := range commands {
+		fmt.Fprintf(w, "  %s%-10s%s %s%s%s\n", cyan, c.name, reset, gray, c.desc, reset)
+	}
 
-Flags:
+	fmt.Fprintf(w, "\n%sFlags:%s\n", yellow, reset)
-  -h, --help      show this help
+	fmt.Fprintf(w, "  %s-h, --help%s      %sshow this help%s\n", cyan, reset, gray, reset)
-  -V, --version   print the version
+	fmt.Fprintf(w, "  %s-V, --version%s   %sprint the version%s\n", cyan, reset, gray, reset)
 
-Run "gasm <command> -h" for a command's usage and flags.
+	fmt.Fprintf(w, "\nRun \"gasm <command> -h\" for a command's usage and flags.\n\n")
 
-Examples:
+	fmt.Fprintf(w, "%sExamples:%s\n", yellow, reset)
-  gasm fmt                  reformat every .s below the current directory
+	examples := []struct{ cmd, desc string }{
-  gasm lint go-flac/*.s     run static checks over the kernels
+		{"gasm fmt", "reformat every .s below the current directory"},
-  gasm asm -o k.bin kern_amd64.s
+		{"gasm lint go-flac/*.s", "run static checks over the kernels"},
-  gasm asm --format elf -o k.o kern_amd64.s
+		{"gasm asm -o k.bin kern_amd64.s", ""},
-  gasm asm --format goobj -p pkg/path -o k.o kern_amd64.s
+		{"gasm asm --format elf -o k.o kern_amd64.s", ""},
-`, version)
+		{"gasm asm --format goobj -p pkg/path -o k.o kern_amd64.s", ""},
+	}
+	for _, e := range examples {
+		if e.desc != "" {
+			fmt.Fprintf(w, "  %s%s%s  %s%s%s\n", cyan, e.cmd, reset, gray, e.desc, reset)
+		} else {
+			fmt.Fprintf(w, "  %s%s%s\n", cyan, e.cmd, reset)
+		}
+	}
 }
 
 // newCommand returns the FlagSet of a subcommand whose -h/--help prints a

debug/breakpoint.go

@@ -1,8 +1,6 @@
 // Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
 // SPDX-License-Identifier: BSD-3-Clause
 
-//go:build linux && amd64
-
 package debug
 
 import "fmt"
@@ -85,14 +83,15 @@ func (c *Condition) Eval(regs *Regs) bool {
 }
 
 // Breakpoints manages the set of breakpoints for a Session.
+// Breakpoints manages software breakpoints for a debuggee.
 type Breakpoints struct {
-	s   *Session
+	t   tracer
 	bps map[uint64]*Breakpoint
 }
 
-// NewBreakpoints creates a breakpoint manager for the session.
+// NewBreakpoints creates a new breakpoint manager.
-func NewBreakpoints(s *Session) *Breakpoints {
+func NewBreakpoints(t tracer) *Breakpoints {
-	return &Breakpoints{s: s, bps: make(map[uint64]*Breakpoint)}
+	return &Breakpoints{t: t, bps: make(map[uint64]*Breakpoint)}
 }
 
 // Set installs a breakpoint at addr (replaces any existing one).
@@ -108,14 +107,14 @@ func (bm *Breakpoints) SetWithCond(addr uint64, label string, cond *Condition) (
 		return bp, nil
 	}
 	// Read the original byte.
-	word, err := bm.s.Peek(addr)
+	word, err := bm.t.Peek(addr)
 	if err != nil {
 		return nil, err
 	}
 	orig := byte(word)
 	// Patch with INT3 (0xCC), preserving the rest of the word.
 	patched := (word &^ 0xFF) | 0xCC
-	if err := bm.s.Poke(addr, patched); err != nil {
+	if err := bm.t.Poke(addr, patched); err != nil {
 		return nil, err
 	}
 	bp := &Breakpoint{Addr: addr, Label: label, Orig: orig, Enabled: true, Cond: cond}
@@ -160,12 +159,12 @@ func (bm *Breakpoints) Clear(addr uint64) error {
 	if !ok {
 		return fmt.Errorf("debug: no breakpoint at %#x", addr)
 	}
-	word, err := bm.s.Peek(addr)
+	word, err := bm.t.Peek(addr)
 	if err != nil {
 		return err
 	}
 	restored := (word &^ 0xFF) | uint64(bp.Orig)
-	if err := bm.s.Poke(addr, restored); err != nil {
+	if err := bm.t.Poke(addr, restored); err != nil {
 		return err
 	}
 	delete(bm.bps, addr)
@@ -211,24 +210,24 @@ func (bm *Breakpoints) HandleTrap(regs *Regs) *Breakpoint {
 	if bp.Cond != nil && !bp.Cond.Eval(regs) {
 		// Condition not met — restore the byte but do NOT rewind RIP.
 		// The process continues from the next instruction (past the INT3).
-		word, err := bm.s.Peek(trapAddr)
+		word, err := bm.t.Peek(trapAddr)
 		if err == nil {
 			restored := (word &^ 0xFF) | uint64(bp.Orig)
-			bm.s.Poke(trapAddr, restored)
+			bm.t.Poke(trapAddr, restored)
 		}
 		// RIP is already past the INT3 (trapAddr + 1). Don't rewind.
 		return nil
 	}
 	bp.hits++
 	// Restore the original byte.
-	word, err := bm.s.Peek(trapAddr)
+	word, err := bm.t.Peek(trapAddr)
 	if err == nil {
 		restored := (word &^ 0xFF) | uint64(bp.Orig)
-		bm.s.Poke(trapAddr, restored)
+		bm.t.Poke(trapAddr, restored)
 	}
 	// Rewind RIP to re-execute the original instruction.
 	regs.RIP = trapAddr
-	bm.s.SetRegs(regs)
+	bm.t.SetRegs(regs)
 	return bp
 }
 
@@ -240,10 +239,10 @@ func (bm *Breakpoints) Reinsert(addr uint64) error {
 	if !ok || !bp.Enabled {
 		return nil
 	}
-	word, err := bm.s.Peek(addr)
+	word, err := bm.t.Peek(addr)
 	if err != nil {
 		return err
 	}
 	patched := (word &^ 0xFF) | 0xCC
-	return bm.s.Poke(addr, patched)
+	return bm.t.Poke(addr, patched)
 }

debug/debug_test.go

@@ -1,11 +1,12 @@
 // Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
 // SPDX-License-Identifier: BSD-3-Clause
 
-//go:build linux && amd64
-
 package debug
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func TestConditionEval(t *testing.T) {
 	regs := &Regs{
@@ -164,3 +165,109 @@ func TestNearestLabel(t *testing.T) {
 		}
 	}
 }
+
+func TestBreakpointsSetAndClear(t *testing.T) {
+	tr := newMockTracer()
+	bm := NewBreakpoints(tr)
+
+	// Set a breakpoint at address 0x1000.
+	bp, err := bm.Set(0x1000, "test")
+	if err != nil {
+		t.Fatalf("Set: %v", err)
+	}
+	if !bp.Enabled {
+		t.Error("breakpoint not enabled")
+	}
+	if bp.Label != "test" {
+		t.Errorf("label = %q, want test", bp.Label)
+	}
+
+	// Verify Peek was called.
+	if len(tr.peeks) != 1 || tr.peeks[0] != 0x1000 {
+		t.Errorf("peeks = %v, want [0x1000]", tr.peeks)
+	}
+
+	// Verify Poke wrote INT3.
+	if len(tr.pokes) != 1 || tr.pokes[0].addr != 0x1000 {
+		t.Errorf("pokes = %v", tr.pokes)
+	}
+
+	// At should find it.
+	if bm.At(0x1000) == nil {
+		t.Error("At(0x1000) returned nil")
+	}
+
+	// All should return it.
+	all := bm.All()
+	if len(all) != 1 {
+		t.Errorf("All() = %d breakpoints, want 1", len(all))
+	}
+
+	// Clear it.
+	if err := bm.Clear(0x1000); err != nil {
+		t.Fatalf("Clear: %v", err)
+	}
+	if bm.At(0x1000) != nil {
+		t.Error("At(0x1000) after Clear should be nil")
+	}
+}
+
+func TestBreakpointsSetWithCond(t *testing.T) {
+	tr := newMockTracer()
+	bm := NewBreakpoints(tr)
+
+	cond := &Condition{Reg: "rax", Op: "==", Value: 42}
+	bp, err := bm.SetWithCond(0x2000, "cond_test", cond)
+	if err != nil {
+		t.Fatalf("SetWithCond: %v", err)
+	}
+	if bp.Cond == nil || bp.Cond.Value != 42 {
+		t.Error("condition not set")
+	}
+
+	// Re-setting the same address should update the condition.
+	cond2 := &Condition{Reg: "rbx", Op: "<", Value: 100}
+	bp2, err := bm.SetWithCond(0x2000, "cond_test2", cond2)
+	if err != nil {
+		t.Fatalf("SetWithCond (update): %v", err)
+	}
+	if bp2.Cond.Value != 100 {
+		t.Error("condition not updated")
+	}
+	// Should have only 1 Peek (first Set), second is update (no Peek needed).
+	if len(tr.peeks) != 1 {
+		t.Errorf("expected 1 Peek, got %d", len(tr.peeks))
+	}
+}
+
+func TestBreakpointsClearAll(t *testing.T) {
+	tr := newMockTracer()
+	bm := NewBreakpoints(tr)
+
+	bm.Set(0x1000, "a")
+	bm.Set(0x2000, "b")
+	bm.Set(0x3000, "c")
+
+	if len(bm.All()) != 3 {
+		t.Fatalf("expected 3 breakpoints, got %d", len(bm.All()))
+	}
+
+	bm.ClearAll()
+	if len(bm.All()) != 0 {
+		t.Errorf("ClearAll: expected 0 breakpoints, got %d", len(bm.All()))
+	}
+}
+
+func TestBreakpointInfo(t *testing.T) {
+	tr := newMockTracer()
+	bm := NewBreakpoints(tr)
+	bm.Set(0x4000, "info_test")
+
+	info := bm.Info()
+	if info == "" {
+		t.Error("Info returned empty string")
+	}
+	if !strings.Contains(info, "info_test") {
+		t.Errorf("Info %q does not contain label", info)
+	}
+}

debug/ptrace_linux_amd64.go

@@ -19,38 +19,6 @@ import (
 	"unsafe"
 )
 
-// Regs holds the full general-purpose register set of a traced process
-// (the Linux amd64 user_regs_struct layout).
-type Regs struct {
-	R15     uint64
-	R14     uint64
-	R13     uint64
-	R12     uint64
-	RBP     uint64
-	RBX     uint64
-	R11     uint64
-	R10     uint64
-	R9      uint64
-	R8      uint64
-	RAX     uint64
-	RCX     uint64
-	RDX     uint64
-	RSI     uint64
-	RDI     uint64
-	OrigRAX uint64
-	RIP     uint64
-	CS      uint64
-	RFLAGS  uint64
-	RSP     uint64
-	SS      uint64
-	FSBase  uint64
-	GSBase  uint64
-	DS      uint64
-	ES      uint64
-	FS      uint64
-	GS      uint64
-}
-
 // Session is a ptrace debugging session controlling one debuggee process.
 type Session struct {
 	pid      int

debug/tracer.go

@@ -0,0 +1,90 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+package debug
+
+// Regs holds the full general-purpose register set of a traced process
+// (the Linux amd64 user_regs_struct layout).
+type Regs struct {
+	R15     uint64
+	R14     uint64
+	R13     uint64
+	R12     uint64
+	RBP     uint64
+	RBX     uint64
+	R11     uint64
+	R10     uint64
+	R9      uint64
+	R8      uint64
+	RAX     uint64
+	RCX     uint64
+	RDX     uint64
+	RSI     uint64
+	RDI     uint64
+	OrigRAX uint64
+	RIP     uint64
+	CS      uint64
+	RFLAGS  uint64
+	RSP     uint64
+	SS      uint64
+	FSBase  uint64
+	GSBase  uint64
+	DS      uint64
+	ES      uint64
+	FS      uint64
+	GS      uint64
+}
+
+// tracer abstracts the minimal ptrace operations needed by the breakpoint
+// manager and the stop-information helpers.  The live implementation is
+// *Session (ptrace_linux_amd64.go); tests supply a mock.
+type tracer interface {
+	Peek(addr uint64) (uint64, error)
+	Poke(addr uint64, val uint64) error
+	SetRegs(regs *Regs) error
+	Pid() int
+}
+
+// mockTracer records Peek/Poke calls and provides fake register state.
+type mockTracer struct {
+	mem   map[uint64]byte
+	peeks []uint64
+	pokes []struct {
+		addr uint64
+		val  uint64
+	}
+	regs *Regs
+}
+
+func newMockTracer() *mockTracer {
+	return &mockTracer{
+		mem:  make(map[uint64]byte),
+		regs: &Regs{},
+	}
+}
+
+func (m *mockTracer) Peek(addr uint64) (uint64, error) {
+	m.peeks = append(m.peeks, addr)
+	var val uint64
+	for i := uint64(0); i < 8; i++ {
+		val |= uint64(m.mem[addr+i]) << (i * 8)
+	}
+	return val, nil
+}
+
+func (m *mockTracer) Poke(addr uint64, val uint64) error {
+	m.pokes = append(m.pokes, struct {
+		addr uint64
+		val  uint64
+	}{addr, val})
+	for i := uint64(0); i < 8; i++ {
+		m.mem[addr+i] = byte(val >> (i * 8))
+	}
+	return nil
+}
+
+func (m *mockTracer) SetRegs(regs *Regs) error {
+	m.regs = regs
+	return nil
+}
+func (m *mockTracer) Pid() int { return 42 }

justfile

@@ -3,7 +3,7 @@
 
 # gasm-devkit — developer tooling for Go's Plan 9 assembler (GAsm).
 
-version := "0.27.0"
+version := "0.28.0"
 
 default:
     @just --list