diff options
| author | Vivek Goyal <vgoyal@in.ibm.com> | 2007-02-13 13:26:22 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-02-13 13:26:22 +0100 |
| commit | f8657e1b55901e6c227094258d1fa3642fa242bd (patch) | |
| tree | da8fa95fcec1c160831f7fc6a569cb27cf81c63b /arch/i386/kernel/vmlinux.lds.S | |
| parent | 7c0b49f9d1d59b3638c884b346a92dcb4ea1560a (diff) | |
[PATCH] i386: move startup_32() in text.head section
o Entry startup_32 was in .text section but it was accessing some init
data too and it prompts MODPOST to generate compilation warnings.
WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from
.text between '_text' (at offset 0xc0100029) and 'startup_32_smp'
WARNING: vmlinux - Section mismatch: reference to .init.data:boot_params from
.text between '_text' (at offset 0xc0100037) and 'startup_32_smp'
WARNING: vmlinux - Section mismatch: reference to
.init.data:init_pg_tables_end from .text between '_text' (at offset
0xc0100099) and 'startup_32_smp'
o Can't move startup_32 to .init.text as this entry point has to be at the
start of bzImage. Hence moved startup_32 to a new section .text.head and
instructed MODPOST to not to generate warnings if init data is being
accessed from .text.head section. This code has been audited.
o SMP boot up code (startup_32_smp) can go into .init.text if CPU hotplug
is not supported. Otherwise it generates more warnings
WARNING: vmlinux - Section mismatch: reference to .init.data:new_cpu_data from
.text between 'checkCPUtype' (at offset 0xc0100126) and 'is486'
WARNING: vmlinux - Section mismatch: reference to .init.data:new_cpu_data from
.text between 'checkCPUtype' (at offset 0xc0100130) and 'is486'
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/i386/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/i386/kernel/vmlinux.lds.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S index 5038a73d554..ca51610955d 100644 --- a/arch/i386/kernel/vmlinux.lds.S +++ b/arch/i386/kernel/vmlinux.lds.S @@ -37,9 +37,14 @@ SECTIONS { . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR; phys_startup_32 = startup_32 - LOAD_OFFSET; + + .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) { + _text = .; /* Text and read-only data */ + *(.text.head) + } :text = 0x9090 + /* read-only */ .text : AT(ADDR(.text) - LOAD_OFFSET) { - _text = .; /* Text and read-only data */ *(.text) SCHED_TEXT LOCK_TEXT |