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authorEric W. Biederman <ebiederm@xmission.com>2006-12-07 02:14:04 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:04 +0100
commit968de4f02621db35b8ae5239c8cfc6664fb872d8 (patch)
tree9388da7f18f9511e1bbfeaf934cba8dbc696e9f4 /include/linux/screen_info.h
parentfd593d12770d4a0d1ff095d44b96436c18479ee8 (diff)
[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>
Diffstat (limited to 'include/linux/screen_info.h')
-rw-r--r--include/linux/screen_info.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/screen_info.h b/include/linux/screen_info.h
index 2925e66a6732..b02308ee7667 100644
--- a/include/linux/screen_info.h
+++ b/include/linux/screen_info.h
@@ -42,7 +42,8 @@ struct screen_info {
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;