linux.git/arch/x86/kernel/vmlinux_32.lds.S, branch master

x86, vmlinux.lds: unify remaining parts

2009-04-29T08:20:35+00:00

32 bit:
- explicit page align .bss
- move ALING() out of .brk output section
- discard *(.eh_frame)

64 bit:
- move ALIGN() out of .bss output section
- move ALIGN() out of .brk output section
- use a dedicated section to define _end

[ Impact: unify and fix section alignments in linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-13-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify percpu

2009-04-29T08:20:34+00:00

32 bit:
- move __init_end outside the .bss output section
  It really did not belong in there

[ Impact: 64-bit: cleanup, 32-bit: refactor linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-12-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify .exit.* and .init.ramfs

2009-04-29T08:20:34+00:00

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-11-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify parainstructions

2009-04-29T08:20:33+00:00

32 bit:

 - increase alignment from 4 to 8 for .parainstructions
 - increase alignment from 4 to 8 for .altinstructions

64 bit:

 - move ALIGN() outside output section for .altinstructions

None of the above should result in any functional change.

[ Impact: refactor and unify linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-10-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify first part of initdata

2009-04-29T08:20:33+00:00

32-bit:

 - Move definition of __init_begin outside output_section
   because it covers more than one section
 - Move ALIGN() for end-of-section inside .smp_locks output section.
   Same effect but the intent is better documented that
   we need both start and end aligned.

64-bit:

 - Move ALIGN() outside output section in .init.setup
 - Deleted unused __smp_alt_* symbols

None of the above should result in any functional change.

[ Impact: refactor and unify linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-9-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify data output sections

2009-04-29T08:20:32+00:00

For 64 bit the following functional changes are introduced:

 - .data.page_aligned has moved
 - .data.cacheline_aligned has moved
 - .data.read_mostly has moved
 - ALIGN() moved out of output section for .data.cacheline_aligned
 - ALIGN() moved out of output section for .data.page_aligned

Notice that 32 bit and 64 bit has different location of _edata.
.data_nosave is 32 bit only as 64 bit is special due to PERCPU.

[ Impact: 32-bit: cleanup, 64-bit: use 32-bit linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-7-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify exception table

2009-04-29T08:20:31+00:00

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-6-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify .text output sections

2009-04-29T08:20:31+00:00

32 bit x86 had a dedicated .text.head output section,
whereas 64 bit had it all in a single output section.

In the unified version the dedicated .text.head output section
was kept to have full control over the head code.

32 bit:

- Moved definition of _stext to the linker script.
  The definition is located _after_ .text.page_aligned as this
  is what 32 bit did before.

The ALIGN(8) was introduced so we hit the exact same address
(on the tested config) before and after the move.

I assume that it is a bug that _stext did not cover the
.text.page_aligned section - if this is true it can be fixed
in a follow-up patch (and the ugly ALIGN() can be dropped).

[ Impact: 64-bit: cleanup, 32-bit: use the 64-bit linker script ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-5-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify start/end of SECTIONS

2009-04-29T08:20:30+00:00

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-4-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar

x86, vmlinux.lds: unify PHDRS

2009-04-29T08:20:30+00:00

PHDRS are not equal for the two - so
use ifdefs to cover up for that.

On the assumption that they may become equal the ifdef
is inside the PHDRS definiton.

[ Impact: cleanup ]

Signed-off-by: Sam Ravnborg 
Cc: Tim Abbott 
Cc: Linus Torvalds 
LKML-Reference: <1240991249-27117-3-git-send-email-sam@ravnborg.org>
Signed-off-by: Ingo Molnar