diff --git a/lsp/handlers.go b/lsp/handlers.go
index ae86933..54fa735 100644
--- a/lsp/handlers.go
+++ b/lsp/handlers.go
@@ -452,6 +452,50 @@ func (s *Server) documentHighlights(p documentHighlightParams) []DocumentHighlig
 	return out
 }
 
+// workspaceSymbols searches all open documents for symbols matching the query.
+func (s *Server) workspaceSymbols(p workspaceSymbolParams) []WorkspaceSymbol {
+	if p.Query == "" {
+		return nil
+	}
+	query := strings.ToLower(p.Query)
+	var out []WorkspaceSymbol
+	for uri, text := range s.docs {
+		f, _ := parser.Parse(uriPath(uri), text)
+		if f == nil {
+			continue
+		}
+		for _, d := range f.Decls {
+			switch dd := d.(type) {
+			case *ast.Text:
+				if strings.Contains(strings.ToLower(dd.Name.Name), query) {
+					out = append(out, WorkspaceSymbol{
+						Name:     dd.Name.Name,
+						Kind:     symFunction,
+						Location: Location{URI: uri, Range: symRange(dd.Name)},
+					})
+				}
+			case *ast.Globl:
+				if dd.Name != nil && strings.Contains(strings.ToLower(dd.Name.Name), query) {
+					out = append(out, WorkspaceSymbol{
+						Name:     dd.Name.Name,
+						Kind:     symConstant,
+						Location: Location{URI: uri, Range: symRange(dd.Name)},
+					})
+				}
+			case *ast.Data:
+				if dd.Name != nil && strings.Contains(strings.ToLower(dd.Name.Name), query) {
+					out = append(out, WorkspaceSymbol{
+						Name:     dd.Name.Name,
+						Kind:     symConstant,
+						Location: Location{URI: uri, Range: symRange(dd.Name)},
+					})
+				}
+			}
+		}
+	}
+	return out
+}
+
 // documentSymbols returns functions and their labels, plus global symbols.
 func (s *Server) documentSymbols(p documentSymbolParams) []DocumentSymbol {
 	text := s.docs[p.TextDocument.URI]
diff --git a/lsp/protocol.go b/lsp/protocol.go
index 0e087a6..279a4c7 100644
--- a/lsp/protocol.go
+++ b/lsp/protocol.go
@@ -312,6 +312,7 @@ type ServerCapabilities struct {
 	DocumentHighlightProvider  bool           `json:"documentHighlightProvider,omitempty"`
 	CodeActionProvider         bool           `json:"codeActionProvider,omitempty"`
 	SignatureHelpProvider      map[string]any `json:"signatureHelpProvider,omitempty"`
+	WorkspaceSymbolProvider    bool           `json:"workspaceSymbolProvider,omitempty"`
 	SemanticTokensProvider     map[string]any `json:"semanticTokensProvider,omitempty"`
 	InlayHintProvider          bool           `json:"inlayHintProvider,omitempty"`
 	DiagnosticProvider         map[string]any `json:"diagnosticProvider,omitempty"`
@@ -378,6 +379,19 @@ const (
 	highlightWrite = 2
 )
 
+// --- workspace symbols -------------------------------------------------------
+
+type workspaceSymbolParams struct {
+	Query string `json:"query"`
+}
+
+// WorkspaceSymbol represents a symbol found across the workspace.
+type WorkspaceSymbol struct {
+	Name     string   `json:"name"`
+	Kind     int      `json:"kind"`
+	Location Location `json:"location"`
+}
+
 type initializeResult struct {
 	Capabilities ServerCapabilities `json:"capabilities"`
 	ServerInfo   map[string]string  `json:"serverInfo,omitempty"`
diff --git a/lsp/server.go b/lsp/server.go
index 1b02e02..31e5e86 100644
--- a/lsp/server.go
+++ b/lsp/server.go
@@ -135,6 +135,7 @@ func (s *Server) dispatch(msg *rpcMessage) (exit bool) {
 				DocumentHighlightProvider: true,
 				CodeActionProvider:        true,
 				SignatureHelpProvider:     map[string]any{"triggerCharacters": []string{"("}},
+				WorkspaceSymbolProvider:   true,
 			},
 			ServerInfo: map[string]string{"name": "gasm", "version": "0.31.1"},
 		})
@@ -228,6 +229,11 @@ func (s *Server) dispatch(msg *rpcMessage) (exit bool) {
 		json.Unmarshal(msg.Params, &p)
 		s.respond(msg.ID, s.semanticTokens(p))
 
+	case "workspace/symbol":
+		var p workspaceSymbolParams
+		json.Unmarshal(msg.Params, &p)
+		s.respond(msg.ID, s.workspaceSymbols(p))
+
 	case "shutdown":
 		s.respond(msg.ID, nil)
 
diff --git a/lsp/server_test.go b/lsp/server_test.go
index eca0af7..07d70c4 100644
--- a/lsp/server_test.go
+++ b/lsp/server_test.go
@@ -450,6 +450,31 @@ func TestDocumentHighlights(t *testing.T) {
 	}
 }
 
+func TestWorkspaceSymbols(t *testing.T) {
+	in := session("file:///f_amd64.s", cleanDoc) +
+		frame(13, "workspace/symbol", map[string]any{
+			"query": "foo",
+		}) + frame(nil, "exit", nil)
+	msgs := run(t, in)
+	resp := findByID(msgs, 13)
+	if resp == nil {
+		t.Fatal("no workspace/symbol response")
+	}
+	var syms []WorkspaceSymbol
+	if err := json.Unmarshal(mustResult(t, resp), &syms); err != nil {
+		t.Fatal(err)
+	}
+	found := false
+	for _, s := range syms {
+		if s.Name == "foo" {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("want symbol foo in results, got %+v", syms)
+	}
+}
+
 func TestMethodNotFound(t *testing.T) {
 	in := frame(9, "bogus/method", map[string]any{}) + frame(nil, "exit", nil)
 	msgs := run(t, in)