load stage2 high to leave the low RAM for the kernel

[eightysix] / boot.ld

diff --git a/boot.ld b/boot.ld
index b607e11..99bc701 100644 (file)
--- a/boot.ld
+++ b/boot.ld
@@ -6,10 +6,13 @@ SECTIONS {
        .bootsect : {
                * (.bootsect);
        }
+       _bootsect_end = .;
 
-       . = 0x7e00;
+       /* load high out of the way, to allow stage2 to load the kernel low */
+       . = 0x80000;
        _stage2_start = .;
-       .text : {
+       _stage2_start_seg = _stage2_start >> 4;
+       .text : AT(_bootsect_end) {
                * (.startup);
                * (.text*);
        }
@@ -19,6 +22,7 @@ SECTIONS {
        }
        .bss ALIGN(4) (NOLOAD): {
                _bss_start = .;
+               _bss_start_off = _bss_start - _stage2_start;
                * (.bss*);
                * (COMMON);
                . = ALIGN(4);
@@ -26,4 +30,5 @@ SECTIONS {
        _bss_size = SIZEOF(.bss);
        . = ALIGN(4);
        _stage2_end = .;
+       _stage2_size = _stage2_end - _stage2_start;
 };