First commit

3 files changed, 139 insertions, 0 deletions

diff --git a/src/op/call/CMakeLists.txt b/src/op/call/CMakeLists.txt
new file mode 100644
index 0000000..527f35d
--- /dev/null
+++ b/src/op/call/CMakeLists.txt
@@ -0,0 +1,11 @@
+# nanowasm, a tiny WebAssembly/Wasm interpreter
+# Copyright (C) 2023-2024  Xavier Del Campo Romero
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+target_sources(${PROJECT_NAME} PRIVATE
+    call.c
+    call_indirect.c
+)
diff --git a/src/op/call/call.c b/src/op/call/call.c
new file mode 100644
index 0000000..19355ca
--- /dev/null
+++ b/src/op/call/call.c
@@ -0,0 +1,79 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2024  Xavier Del Campo Romero
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <nw/log.h>
+#include <nw/ops.h>
+#include <nanowasm/nw.h>
+#include <nw/interp.h>
+#include <nw/search.h>
+#include <nw/sections.h>
+#include <nw/types.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+static int call(struct nw_interp *const i, const varuint32 function_index)
+{
+    FILE *const f = i->f;
+    const struct nw_mod *const m = i->cfg.m;
+    struct nw_frame fr = {0};
+    struct search_fn fn;
+
+    /* TODO: treat import functions. */
+    if (search_fn(function_index, m, f, &fn))
+    {
+        LOG("%s: search_fn failed\n", __func__);
+        return -1;
+    }
+    else if (section_type_push(f, m, fn.index, &fr))
+    {
+        LOG("%s: section_type_push failed\n", __func__);
+        return -1;
+    }
+    else if (section_code_push(f, fn.start, &fr))
+    {
+        LOG("%s: section_code_push failed\n", __func__);
+        return -1;
+    }
+    else if (interp_push(i, &fr))
+    {
+        LOG("%s: interp_push failed\n", __func__);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int op(struct nw_interp *const i, FILE *const f)
+{
+    varuint32 function_index;
+
+    if (varuint32_read(f, &function_index))
+    {
+        LOG("%s: varuint32_read failed\n", __func__);
+        return -1;
+    }
+    else if (i && call(i, function_index))
+    {
+        LOG("%s: call failed\n", __func__);
+        return -1;
+    }
+
+    return 0;
+}
+
+int op_call(struct nw_interp *const i)
+{
+    return op(i, i->f);
+}
+
+int check_call(FILE *const f)
+{
+    return op(NULL, f);
+}
diff --git a/src/op/call/call_indirect.c b/src/op/call/call_indirect.c
new file mode 100644
index 0000000..bae8a57
--- /dev/null
+++ b/src/op/call/call_indirect.c
@@ -0,0 +1,49 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2024  Xavier Del Campo Romero
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <nw/log.h>
+#include <nw/ops.h>
+#include <nanowasm/nw.h>
+#include <nw/types.h>
+#include <stdio.h>
+
+static int op(struct nw_interp *const i, FILE *const f)
+{
+    varuint32 type_index;
+    varuint1 reserved;
+
+    if (varuint32_read(f, &type_index))
+    {
+        LOG("%s: varuint32_read failed\n", __func__);
+        return 1;
+    }
+    else if (varuint1_read(f, &reserved))
+    {
+        LOG("%s: varuint1_read failed\n", __func__);
+        return 1;
+    }
+    else if (reserved)
+    {
+        LOG("%s: unexpected non-zero reserved value %u\n",
+            __func__, (unsigned)reserved);
+        return 1;
+    }
+
+    return 0;
+}
+
+int op_call_indirect(struct nw_interp *const i)
+{
+    return op(i, i->f);
+}
+
+int check_call_indirect(FILE *const f)
+{
+    return op(NULL, f);
+}