diff options
| -rw-r--r-- | sys/boot/i386/boot2/boot1.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/boot/i386/boot2/boot1.S b/sys/boot/i386/boot2/boot1.S index 14d28b3..984ab52 100644 --- a/sys/boot/i386/boot2/boot1.S +++ b/sys/boot/i386/boot2/boot1.S @@ -125,7 +125,10 @@ main: cld # String ops inc mov $start,%sp # stack /* * Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets - * %cx == 0x100. + * %cx == 0x100. Note that boot1 does not use this relocated copy + * of itself while loading boot2; however, BTX reclaims the memory + * used by boot1 during its initialization. As a result, boot2 uses + * xread from the relocated copy. */ mov %sp,%si # Source mov $MEM_REL,%di # Destination |
