From 968de4f02621db35b8ae5239c8cfc6664fb872d8 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Thu, 7 Dec 2006 02:14:04 +0100 Subject: [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 Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen --- include/linux/screen_info.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') 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; -- cgit v1.2.3-59-g8ed1b