initial paging helpers

1 files changed, 21 insertions, 4 deletions

diff --git a/linker.ld b/linker.ld
index 323eb69..46d03e0 100644
--- a/linker.ld
+++ b/linker.ld
@@ -1,5 +1,9 @@
 OUTPUT_ARCH("riscv")
 
+MEMORY {
+	ram (wxa) : ORIGIN = 0x80200000, LENGTH = 128M
+}
+
 ENTRY(start)
 
 PHDRS {
@@ -13,11 +17,24 @@ SECTIONS {
 	.text (0x80200000) : {
 		*(.text.start)
 		*(.text .text.*)
-	} : lo_rx
+	} > ram AT > ram : lo_rx
+
+	.rodata : { *(.rodata .rodata.*) } > ram AT > ram : lo_r
+	.data   : { *(.data    .data.* ) } > ram AT > ram : lo_rw
+	.bss    : {
+		*(.bss .bss.*)
 
-	.rodata : { *(.rodata .rodata.*) } : lo_r
-	.data   : { *(.data    .data.* ) } : lo_rw
-	.bss    : { *(.bss     .bss.*  ) } : lo_rw
+		PROVIDE(_bss_end = .);
+	} > ram AT > ram : lo_rw
 
 	/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
+
+	PROVIDE(_memory_start = ORIGIN(ram));
+	PROVIDE(_memory_end = ORIGIN(ram) + LENGTH(ram));
+
+	PROVIDE(_stack_start = _bss_end);
+	PROVIDE(_stack_end = _stack_start + 0x80000);
+
+	PROVIDE(_heap_start = _stack_end);
+	PROVIDE(_heap_size = _memory_end - _heap_start);
 }