Add a GOT.func import test

Author: osa1

test/ld/Makefile

@@ -14,7 +14,7 @@ WASM_LD?=wasm-ld-10
 MO_LD?=../../src/mo-ld
 
 _out/%.lib.o: %.c | _out
-	$(WASM_CLANG) --compile -fpic --std=c11 --target=wasm32-unknown-unknown-wasm -fvisibility=hidden --optimize=3 \
+	$(WASM_CLANG) --compile -fPIC --target=wasm32-unknown-emscripten --optimize=3 \
 		-fno-builtin -Wall \
 		$< --output $@
 
@@ -30,7 +30,7 @@ _out/%.linked.wasm: _out/%.base.wasm _out/%.lib.wasm
 	$(MO_LD) -b _out/$*.base.wasm -l _out/$*.lib.wasm -o _out/$*.linked.wasm
 
 _out/%.wat: _out/%.wasm
-	wasm2wat --no-check $< -o $@
+	wasm2wat $< -o $@
 
 _out/%.valid: _out/%.wasm
 	wasm-validate $< > $@ 2>&1 || true

test/ld/fun-ptr.c

@@ -0,0 +1,11 @@
+__attribute__ ((visibility("default")))
+int f(int x, int y)
+{
+    return x + y;
+}
+
+__attribute__ ((visibility("default")))
+int (*exported(void)) (int x, int y)
+{
+    return &f;
+}

test/ld/fun-ptr.wat

@@ -0,0 +1,15 @@
+(module
+  (type (;0;) (func (result i32)))
+  (type (;1;) (func (param i32) (param i32) (result i32)))
+  (import "rts" "exported" (func $exported (result i32)))
+  (table (;0;) 0 0 anyfunc)
+  (memory (;0;) 2)
+  (global $heap_base i32 (i32.const 65536))
+  (export "__heap_base" (global $heap_base))
+  (func $call_imported (type 0)
+    call $exported
+    i32.const 3
+    i32.const 5
+    call_indirect (type 1)
+  )
+)

test/ld/ok/fun-ptr.linked.wat.ok

@@ -0,0 +1,26 @@
+(module
+  (type (;0;) (func (result i32)))
+  (type (;1;) (func (param i32 i32) (result i32)))
+  (type (;2;) (func))
+  (func $call_imported (type 0) (result i32)
+    call $exported
+    i32.const 3
+    i32.const 5
+    call_indirect (type 1))
+  (func $__wasm_call_ctors (type 2)
+    call $__wasm_apply_relocs)
+  (func $__wasm_apply_relocs (type 2))
+  (func $f (type 1) (param i32 i32) (result i32)
+    local.get 1
+    local.get 0
+    i32.add)
+  (func $exported (type 0) (result i32)
+    global.get 1)
+  (func $link_start (type 2)
+    call $__wasm_call_ctors)
+  (table (;0;) 1 1 funcref)
+  (memory (;0;) 2)
+  (global (;0;) i32 (i32.const 65536))
+  (global (;1;) (mut i32) (i32.const 0))
+  (start $link_start)
+  (elem (i32.const 0) func $f))