init

Makefile

@@ -0,0 +1,25 @@
+TOP=../..
+include $(TOP)/Make.rules
+
+
+LDLIBS=
+CFLAGS+=-O0 -g
+
+LDFLAGS+=-Wl,--no-relax
+LDFLAGS+=-Wl,-Tdata=0x80010000
+
+
+PROGS=prog prog.bin prog.lst 
+
+all:: $(PROGS)
+
+prog: crt0.o main.o
+	$(LINK.c) -o $@ $^ $(LDLIBS)
+	$(SIZE) -A -x $@
+
+clean::
+	rm -f $(PROGS) *.o *.s *.lst *.bin *.srec
+
+.PHONY: run
+run: prog.bin
+	../../../src/rvddt -l0x3000 -f prog.bin

crt0.S

@@ -0,0 +1,29 @@
+  .text
+  .global _start
+  .type   _start, @function
+
+_start:
+
+  # Initialize global pointer
+.option push
+.option norelax
+	la		gp,__global_pointer$
+.option pop
+
+	# Clear the bss segment
+	la      a0,__bss_start
+	la      a1,__BSS_END__
+
+clear_bss:
+	bgeu	a0,a1,finish_bss
+	sb		x0,0(a0)
+	addi	a0,a0,1
+	beq		x0,x0,clear_bss
+finish_bss:
+
+	call    main
+
+	# abort execution here
+	ebreak			
+
+	.size  _start, .-_start

main.c

@@ -0,0 +1,29 @@
+#include <stdint.h>
+
+uint32_t x = 1, y =2, z[10];
+uint32_t *ip;
+
+char * ptr = "informatyk\0";
+
+int strlen ( char *s ) {
+    int n;
+
+    for (n = 0; *s != '\0'; s++) {
+        n++;
+    }
+
+  return n;
+}
+
+int main () {
+
+    ip =&x;
+    y = *ip;
+    *ip = 0;
+
+    ip = &z[0];
+
+    x = strlen (ptr) ;   
+
+  return 0;
+}