linux/arch/um/kernel/uml.lds.S
Tejun Heo 023bf6f1b8 linker script: unify usage of discard definition
Discarded sections in different archs share some commonality but have
considerable differences.  This led to linker script for each arch
implementing its own /DISCARD/ definition, which makes maintaining
tedious and adding new entries error-prone.

This patch makes all linker scripts to move discard definitions to the
end of the linker script and use the common DISCARDS macro.  As ld
uses the first matching section definition, archs can include default
discarded sections by including them earlier in the linker script.

ia64 is notable because it first throws away some ia64 specific
subsections and then include the rest of the sections into the final
image, so those sections must be discarded before the inclusion.

defconfig compile tested for x86, x86-64, powerpc, powerpc64, ia64,
alpha, sparc, sparc64 and s390.  Michal Simek tested microblaze.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Cc: linux-arch@vger.kernel.org
Cc: Michal Simek <monstr@monstr.eu>
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Tony Luck <tony.luck@intel.com>
2009-07-09 11:27:40 +09:00

106 lines
2.1 KiB
ArmAsm

#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
OUTPUT_FORMAT(ELF_FORMAT)
OUTPUT_ARCH(ELF_ARCH)
ENTRY(_start)
jiffies = jiffies_64;
SECTIONS
{
/* This must contain the right address - not quite the default ELF one.*/
PROVIDE (__executable_start = START);
/* Static binaries stick stuff here, like the sigreturn trampoline,
* invisibly to objdump. So, just make __binary_start equal to the very
* beginning of the executable, and if there are unmapped pages after this,
* they are forever unusable.
*/
__binary_start = START;
. = START + SIZEOF_HEADERS;
_text = .;
_stext = .;
__init_begin = .;
.init.text : {
_sinittext = .;
INIT_TEXT
_einittext = .;
}
. = ALIGN(PAGE_SIZE);
.text :
{
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
*(.fixup)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.gnu.linkonce.t*)
}
. = ALIGN(PAGE_SIZE);
.syscall_stub : {
__syscall_stub_start = .;
*(.__syscall_stub*)
__syscall_stub_end = .;
}
#include "asm/common.lds.S"
init.data : { INIT_DATA }
.data :
{
. = ALIGN(KERNEL_STACK_SIZE); /* init_task */
*(.data.init_task)
. = ALIGN(KERNEL_STACK_SIZE);
*(.data.init_irqstack)
DATA_DATA
*(.gnu.linkonce.d*)
CONSTRUCTORS
}
.data1 : { *(.data1) }
.ctors :
{
*(.ctors)
}
.dtors :
{
*(.dtors)
}
.got : { *(.got.plt) *(.got) }
.dynamic : { *(.dynamic) }
.tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
.tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
/* We want the small data sections together, so single-instruction offsets
can access them all, and initialized data all before uninitialized, so
we can shorten the on-disk segment size. */
.sdata : { *(.sdata) }
_edata = .;
PROVIDE (edata = .);
. = ALIGN(PAGE_SIZE);
.sbss :
{
__bss_start = .;
PROVIDE(_bss_start = .);
*(.sbss)
*(.scommon)
}
.bss :
{
*(.dynbss)
*(.bss)
*(COMMON)
}
_end = .;
PROVIDE (end = .);
STABS_DEBUG
DWARF_DEBUG
DISCARDS
}