[PATCH] i386: Relocatable kernel support
This patch modifies the i386 kernel so that if CONFIG_RELOCATABLE is
selected it will be able to be loaded at any 4K aligned address below
1G. The technique used is to compile the decompressor with -fPIC and
modify it so the decompressor is fully relocatable. For the main
kernel relocations are generated. Resulting in a kernel that is relocatable
with no runtime overhead and no need to modify the source code.
A reserved 32bit word in the parameters has been assigned
to serve as a stack so we figure out where are running.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
diff --git a/include/linux/screen_info.h b/include/linux/screen_info.h
index 2925e66..b02308e 100644
--- a/include/linux/screen_info.h
+++ b/include/linux/screen_info.h
@@ -42,7 +42,8 @@
u16 pages; /* 0x32 */
u16 vesa_attributes; /* 0x34 */
u32 capabilities; /* 0x36 */
- /* 0x3a -- 0x3f reserved for future expansion */
+ /* 0x3a -- 0x3b reserved for future expansion */
+ /* 0x3c -- 0x3f micro stack for relocatable kernels */
};
extern struct screen_info screen_info;