Re-implement invokeNative function of arm/mips/general version (#125)

Re-implement them due to the function prototype was changed.
Fix typo of sample/gui/README.

core/iwasm/runtime/vmcore-wasm/invokeNative_arm.s

@@ -21,16 +21,16 @@
 /*
  * Arguments passed in:
  *
- * r0 argv
- * r1 argc
- * r2 function pntr
+ * r0 function pntr
+ * r1 argv
+ * r2 argc
  */
 
 invokeNative:
         stmfd   sp!, {r4, r5, r6, r7, lr}
-        mov     r4, r0           /* get argv */
-        mov     r5, r1           /* get argc */
-        mov     ip, r2           /* get function ptr */
+        mov     ip, r0           /* get function ptr */
+        mov     r4, r1           /* get argv */
+        mov     r5, r2           /* get argc */
 
         cmp     r5, #2           /* is argc < 2 ? */
         blt     return

core/iwasm/runtime/vmcore-wasm/invokeNative_general.c

@@ -16,7 +16,7 @@
 
 #include "wasm_runtime.h"
 
-void invokeNative(uint32 argv[], uint32 argc, void (*native_code)())
+void invokeNative(void (*native_code)(), uint32 argv[], uint32 argc)
 {
     WASMThread *self;
     switch(argc) {

core/iwasm/runtime/vmcore-wasm/invokeNative_mips.s

@@ -22,9 +22,9 @@
 
 /**
  * On function entry parameters:
- * $4 = args
- * $5 = arg_num
- * $6 = func_ptr
+ * $4 = func_ptr
+ * $5 = args
+ * $6 = arg_num
  */
 
 invokeNative:
@@ -43,22 +43,22 @@ invokeNative:
     move $fp, $sp
 
     /* allocate enough stack space */
-    sll $11, $5, 2
+    sll $11, $6, 2  /* $11 == arg_num * 4 */
     subu $sp, $11
 
     /* make 8-byte aligned */
-    and $sp, ~7 
+    and $sp, ~7
 
     move $9, $sp
-    move $25, $6    /* $25 = func_ptr */
+    move $25, $4    /* $25 = func_ptr */
 
 push_args:
-    beq $5, 0, done /* arg_num == 0 ? */
-    lw $8, 0($4)
-    sw $8, 0($9)
-    addu $4, 4
-    addu $9, 4
-    subu $5, 1      /* arg_index-- */
+    beq $6, 0, done /* arg_num == 0 ? */
+    lw $8, 0($5)    /* $8 = *args */
+    sw $8, 0($9)    /* store $8 to stack */
+    addu $5, 4      /* args++ */
+    addu $9, 4      /* sp++ */
+    subu $6, 1      /* arg_num-- */
     j push_args
 
 done:

samples/gui/README.md

@@ -52,7 +52,7 @@ Linux
 --------------------------------
 - Build</br>
 `./build.sh`</br>
-    All binaries are in "out", which contains "host_tool", "lvgl_native_ui_app", "ui_app.wasm", "ui_app_lvgl_compatible" and "wasm_runtime_wgl".
+    All binaries are in "out", which contains "host_tool", "lvgl_native_ui_app", "ui_app.wasm", "ui_app_lvgl_compatible.wasm" and "wasm_runtime_wgl".
 - Run native Linux application</br>
 `./lvgl_native_ui_app`</br>
 
@@ -61,7 +61,7 @@ Linux
 `./wasm_runtime_wgl -s`</br>
  Then install wasm APP use host tool.</br>
 `./host_tool -i ui_app -f ui_app.wasm`</br>
-`./host_tool -i ui_app -f ui_app_compatible.wasm`</br>
+`./host_tool -i ui_app -f ui_app_lvgl_compatible.wasm`</br>
 
 Zephyr
 --------------------------------