init

cpp/Makefile

@@ -2,10 +2,13 @@ TOP=./
 include $(TOP)/Make.rules
 
 LDLIBS=
-CFLAGS+=-O0 -g
+#CFLAGS+=-O0 -g
+# CFLAGS+=-Og -ggdb3
+CFLAGS+=-O0 -ggdb3
 
 LDFLAGS+=-Wl,--no-relax
-LDFLAGS+=-Wl,-Tdata=0x10000
+LDFLAGS+=-Wl,-Ttext=0x80000000,-Tdata=0x80010000
+# LDFLAGS+=-T murax_128k_ram.ld
 
 PROGS=prog prog.bin prog.lst 
 

cpp/_crt0.S

@@ -9,7 +9,7 @@ _start:
   la    gp, __global_pointer$
   .option pop
 
-  li sp, 0x1fff0
+  li sp, 0x800ffff0
 
   # Clear the bss segment
   la    a0, __bss_start

cpp/_rvmain.cpp

@@ -1,47 +1,72 @@
 #include <stdint.h>
-//szymon
-//#include "myfunc.h"    
 
-//int8_t x = 1, y = 2, z[10];
+char *  ptr1 = "janek";
-//int8_t *ip;    /* ip to wskaźnik do obiektu typu int */
+char *  ptr2 = "kowalskii";
-
-void swap_ptr (int8_t *x, int8_t *y) {
-
-    int8_t tmp;
-    tmp = *x;
-    *x = *y;
-    *y = tmp;
 
+int strlen(char *s)
+{
+     char *p = s;
+     while (*p != '\0')
+     p++;
+     return p - s;
 }
 
-// -----------------------------------------------
+void strcpy(char *s, char *t)
-
+{
-void swap(int8_t x, int8_t y) {
+     while (*s++ = *t++);
-
-    int8_t tmp;
-    tmp = x;
-    x = y;
-    y = tmp;
-        
 }
 
 
+#define ALLOCSIZE 10000
+
+static char allocbuf[ALLOCSIZE]; 
+static char *allocp = allocbuf; 
+
+char *alloc(int n) 
+{
+
+    if (n % 4 != 0) { 
+        n += 4 - (n % 4);
+    }
+
+
+     if (allocbuf + ALLOCSIZE - allocp >= n) { 
+     allocp += n;
+     return allocp - n; 
+     } else 
+     return 0;
+}
+
 int main()  {
 
-//    ip = &x;    /* ip wskazuje teraz x */
+    char * s = "mpabi";
-//    y = *ip;    /* y ma teraz wartość 1 */
-//    *ip = 0;    /* x ma teraz wartość 0 */
-//    ip = &z[0]; /* ip wskazuje teraz z[0] */
  
-    int8_t mx = 1, my = 2, mz[10]= {1,2,3,4,5};
-    int8_t *mip;    /* ip to wskaźnik do obiektu typu int */
-    mip = &mx;    /* ip wskazuje teraz x */
-    my = *mip;    /* y ma teraz wartość 1 */
-    *mip = 0;    /* x ma teraz wartość 0 */
-    mip = &mz[0]; /* ip wskazuje teraz z[0] */
  
-    swap (mx, my);
+   uint8_t wynik =0;
-    swap_ptr (&mx, &my);
+    wynik = strlen (s);
+
+        asm("nop");
+
+
+        char *  p1 = alloc(strlen(ptr1)); 
+        strcpy (p1, ptr1);
+        asm("nop");
+
+        char *  p2 = alloc(strlen(ptr2)); 
+        strcpy (p2, ptr2);
+        asm("nop");
+
+        struct point {
+            int16_t x;
+            int16_t y;
+        };
+
+        struct point *  ptrS = (struct point *) alloc(sizeof(point)); 
+        ptrS->x=0x10;
+        ptrS->y=0x20;
+        asm("nop");
+
+        (*ptrS).y= strlen (p1)+ strlen(p2);
 
     return 1;
 }