Move rodata into ROM and add missing .data initializer

Author: object-Object

coremark/mlogv32/entry.s

@@ -7,6 +7,20 @@ _start:
     add s0, sp, zero
 
     la gp, __global_pointer$
+
+    # Initialize .data
+    # https://sourceware.org/binutils/docs/ld/Output-Section-LMA.html#Output-Section-LMA
+    la t0, __sidata
+    la t1, __sdata
+    la t2, __edata
+load_data:
+    bgeu t1, t2, data_done
+    lb t3, 0(t0)
+    sb t3, 0(t1)
+    addi t0, t0, 1
+    addi t1, t1, 1
+    j load_data
+data_done:
 
     # Clear BSS section
     la t0, __sbss

rust/mlogv32/link.x

@@ -17,7 +17,7 @@ MEMORY {
 }
 
 REGION_ALIAS("REGION_TEXT",   rom);
-REGION_ALIAS("REGION_RODATA", ram);
+REGION_ALIAS("REGION_RODATA", rom);
 REGION_ALIAS("REGION_DATA",   ram);
 REGION_ALIAS("REGION_BSS",    ram);
 REGION_ALIAS("REGION_HEAP",   ram);