Fix linker RWX warning

arch/riscv/kernel.ld

@@ -0,0 +1,37 @@
+OUTPUT_ARCH("riscv")
+OUTPUT_FORMAT("elf32-littleriscv")
+ENTRY(_entry)
+
+PHDRS {
+	text PT_LOAD FLAGS(5);
+	data PT_LOAD FLAGS(6);
+}
+
+SECTIONS {
+    .text 0x80200000 : {
+		__kernel_base = .;
+        KEEP(*(.text.boot));
+        *(.text .text.*);
+    } :text
+
+    .rodata : ALIGN(16) {
+        *(.rodata .rodata.*);
+    }
+
+    .data : ALIGN(16) {
+        *(.data .data.*);
+    } :data
+
+    .bss : ALIGN(16) {
+        __bss = .;
+        *(.bss .bss.* .sbss .sbss.*);
+        __bss_end = .;
+    }
+
+    . = ALIGN(4);
+    . += 128 * 1024; /* 128KB */
+    __stack_top = .;
+
+	. = ALIGN(CONSTANT(MAXPAGESIZE));
+	__free_ram = .;
+}

arch/riscv/kernel.s

@@ -1,4 +1,4 @@
-.global kernel_main, __bss, __bss_end, __stack_top
+.global _entry, __bss, __bss_end, __stack_top
 
 .section .rodata
 
@@ -215,7 +215,7 @@ panic:
 	ret
 
 .section .text.boot
-boot:
+_entry:
 	la t0, __stack_top
 	mv sp, t0 # Set the stack pointer