diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2006-03-25 16:30:28 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 09:10:55 -0800 |
| commit | eaeae0cc985fa1df753da7edc8d02635cbc1ba39 (patch) | |
| tree | 793319d36cf4c16d0374ab915b3225cc073c3d26 /arch | |
| parent | 5f44a669805ab2c18b347436ec5333173b821268 (diff) | |
[PATCH] x86_64: Patch to make the head.S-must-be-first-in-vmlinux order explicit
This patch puts the code from head.S in a special .bootstrap.text
section.
I'm working on a patch to reorder the functions in the kernel (I'll post
that later), but for x86-64 at least the kernel bootstrap requires that
the head.S functions are on the very first page/pages of the kernel
text. This is understandable since the bootstrap is complex enough
already and not a problem at all, it just means they aren't allowed to
be reordered. This patch puts these special functions into a separate
section to document this, and to guarantee this in the light of possibly
reordering the rest later.
(So this patch doesn't fix a bug per se, but makes things more robust by
making the order of these functions explicit)
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/kernel/head.S | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/vmlinux.lds.S | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 0cddcc03842..6df05e6034f 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -26,6 +26,7 @@ */ .text + .section .bootstrap.text .code32 .globl startup_32 /* %bx: 1 if coming from smp trampoline on secondary cpu */ diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S index 74db0062d4a..029be20acce 100644 --- a/arch/x86_64/kernel/vmlinux.lds.S +++ b/arch/x86_64/kernel/vmlinux.lds.S @@ -20,6 +20,7 @@ SECTIONS phys_startup_64 = startup_64 - LOAD_OFFSET; _text = .; /* Text and read-only data */ .text : AT(ADDR(.text) - LOAD_OFFSET) { + *(.bootstrap.text) *(.text) SCHED_TEXT LOCK_TEXT |