Handle .rodata

.gitignore

@@ -1,2 +1,3 @@
 /target
 text.bin
+rodata.bin

Makefile

@@ -5,6 +5,7 @@ build:
 
 extract: build
 	riscv32-elf-objcopy -O binary --only-section=.text target/riscv32i-unknown-none-elf/release/lw-riscv text.bin
+	riscv32-elf-objcopy -O binary --only-section=.rodata target/riscv32i-unknown-none-elf/release/lw-riscv rodata.bin
 
 size: extract
 	cargo size --release -- -A

memory.x

@@ -1,11 +1,12 @@
 MEMORY
 {
-  RAM : ORIGIN = 0x10000000, LENGTH = 16K
-  FLASH : ORIGIN = 0x00000000, LENGTH = 256K
+  INST   : ORIGIN = 0x00000000, LENGTH = 256K
+  CONST  : ORIGIN = 0x40000000, LENGTH = 16K
+  RAM    : ORIGIN = 0x80000000, LENGTH = 16K
 }
 
-REGION_ALIAS("REGION_TEXT", FLASH);
-REGION_ALIAS("REGION_RODATA", FLASH);
+REGION_ALIAS("REGION_TEXT", INST);
+REGION_ALIAS("REGION_RODATA", CONST);
 REGION_ALIAS("REGION_DATA", RAM);
 REGION_ALIAS("REGION_BSS", RAM);
 REGION_ALIAS("REGION_HEAP", RAM);