fixed relative memory addressing bug

3 files changed, 12 insertions, 31 deletions

diff --git a/prog/link.ld b/prog/link.ld
index 4cc02ec..7bd11eb 100644
--- a/prog/link.ld
+++ b/prog/link.ld
@@ -43,7 +43,7 @@ SECTIONS
     .stack (NOLOAD) :
     {
         _stack_start = .;
-        . += 0x10; /* Adjust the size as needed */
+        . += 0x80; /* Adjust the size as needed */
         _stack_end = .;
     } > RAM
 
@@ -51,7 +51,7 @@ SECTIONS
     .heap (NOLOAD) :
     {
         _heap_start = .;
-        . += 0x10; /* Adjust the size as needed */
+        . += 0x80; /* Adjust the size as needed */
         _heap_end = .;
     } > RAM
 }
diff --git a/prog/src/main.c b/prog/src/main.c
index 1ce067c..8bcdfe2 100644
--- a/prog/src/main.c
+++ b/prog/src/main.c
@@ -1,6 +1,8 @@
 
+extern void test_prog(void);
 
 int main(void) {
+  test_prog();
   while (1) {
   }
 }
diff --git a/prog/src/prog.s.bak b/prog/src/prog.s
index 63026c9..ec227a9 100644
--- a/prog/src/prog.s.bak
+++ b/prog/src/prog.s
@@ -1,11 +1,5 @@
 .section .text
-.globl _start
-
-_start:
-
- 
- j test_prog
-
+.globl test_prog
 
 
 /*
@@ -18,9 +12,6 @@ loop:
   j loop
 */
 
-halt_loop:
-  j halt_loop
-
 test_prog:
   li t0, 0xFFFFFFFF
   li t1, 0x33333333
@@ -45,19 +36,25 @@ test_prog:
   
   beq   t0, t0, branch_eq
   j branch_eq_nt
+end:
+  ret
 
 branch_eq_ret:
   beq   t0, t3, branch_ne
   j branch_ne_nt
 
 branch_ne_ret:
+  addi sp, sp, -16  # Adjust stack pointer to make space for ra and s0
+  sw ra, 0(sp)      # Save ra to the stack
   call func
+  lw ra, 0(sp)      # Load ra from the stack
+  addi sp, sp, 16   # Restore stack pointer
 
   li  t0, 0x00100000 
   sw  t1, 0(t0)
   lw  t2, 0(t0)
 
-  j halt_loop
+  j end
 
 
 branch_eq:
@@ -79,21 +76,3 @@ branch_ne_nt:
 func:
   addi  t5, zero, 5
   ret
-
-
-
-
-
-
-
-
-
- 
-.section .data
-
-
-.section .bss
-
-.section .stack
-  .space 0x1000  # Allocate stack space
-stack_top: