2005-11-04 23:36:59 +00:00
|
|
|
#ifdef CONFIG_PPC64
|
2006-03-28 12:15:54 +00:00
|
|
|
#define PROVIDE32(x) PROVIDE(__unused__##x)
|
2005-11-04 23:36:59 +00:00
|
|
|
#else
|
2006-03-28 12:15:54 +00:00
|
|
|
#define PROVIDE32(x) PROVIDE(x)
|
2005-11-04 23:36:59 +00:00
|
|
|
#endif
|
2008-04-15 19:52:26 +00:00
|
|
|
#include <asm/page.h>
|
2005-09-26 06:04:21 +00:00
|
|
|
#include <asm-generic/vmlinux.lds.h>
|
2007-07-04 04:04:31 +00:00
|
|
|
#include <asm/cache.h>
|
2009-09-24 14:36:24 +00:00
|
|
|
#include <asm/thread_info.h>
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2005-11-03 05:03:06 +00:00
|
|
|
ENTRY(_stext)
|
|
|
|
|
2008-07-21 23:03:45 +00:00
|
|
|
PHDRS {
|
|
|
|
kernel PT_LOAD FLAGS(7); /* RWX */
|
|
|
|
notes PT_NOTE FLAGS(0);
|
|
|
|
dummy PT_NOTE FLAGS(0);
|
|
|
|
|
|
|
|
/* binutils < 2.18 has a bug that makes it misbehave when taking an
|
|
|
|
ELF file with all segments at load address 0 as input. This
|
|
|
|
happens when running "strip" on vmlinux, because of the AT() magic
|
|
|
|
in this linker script. People using GCC >= 4.2 won't run into
|
|
|
|
this problem, because the "build-id" support will put some data
|
|
|
|
into the "notes" segment (at a non-zero load address).
|
|
|
|
|
|
|
|
To work around this, we force some data into both the "dummy"
|
|
|
|
segment and the kernel segment, so the dummy segment will get a
|
|
|
|
non-zero load address. It's not enough to always create the
|
|
|
|
"notes" segment, since if nothing gets assigned to it, its load
|
|
|
|
address will be zero. */
|
|
|
|
}
|
|
|
|
|
2005-09-30 06:16:52 +00:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
OUTPUT_ARCH(powerpc:common64)
|
|
|
|
jiffies = jiffies_64;
|
|
|
|
#else
|
2005-09-26 06:04:21 +00:00
|
|
|
OUTPUT_ARCH(powerpc:common)
|
|
|
|
jiffies = jiffies_64 + 4;
|
2005-09-30 06:16:52 +00:00
|
|
|
#endif
|
2005-09-26 06:04:21 +00:00
|
|
|
SECTIONS
|
|
|
|
{
|
2006-03-28 12:15:54 +00:00
|
|
|
. = KERNELBASE;
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
/*
|
|
|
|
* Text, read only data and other permanent read-only sections
|
|
|
|
*/
|
|
|
|
|
2016-09-28 01:31:48 +00:00
|
|
|
_text = .;
|
|
|
|
_stext = .;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Head text.
|
|
|
|
* This needs to be in its own output section to avoid ld placing
|
|
|
|
* branch trampoline stubs randomly throughout the fixed sections,
|
|
|
|
* which it will do (even if the branch comes from another section)
|
|
|
|
* in order to optimize stub generation.
|
|
|
|
*/
|
|
|
|
.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
|
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
KEEP(*(.head.text.first_256B));
|
|
|
|
#ifdef CONFIG_PPC_BOOK3E
|
|
|
|
# define END_FIXED 0x100
|
|
|
|
#else
|
|
|
|
KEEP(*(.head.text.real_vectors));
|
|
|
|
*(.head.text.real_trampolines);
|
|
|
|
KEEP(*(.head.text.virt_vectors));
|
|
|
|
*(.head.text.virt_trampolines);
|
|
|
|
# if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
|
|
|
|
KEEP(*(.head.data.fwnmi_page));
|
|
|
|
# define END_FIXED 0x8000
|
|
|
|
# else
|
|
|
|
# define END_FIXED 0x7000
|
|
|
|
# endif
|
|
|
|
#endif
|
|
|
|
ASSERT((. == END_FIXED), "vmlinux.lds.S: fixed section overflow error");
|
|
|
|
#else /* !CONFIG_PPC64 */
|
|
|
|
HEAD_TEXT
|
|
|
|
#endif
|
|
|
|
} :kernel
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the build dies here, it's likely code in head_64.S is referencing
|
|
|
|
* labels it can't reach, and the linker inserting stubs without the
|
|
|
|
* assembler's knowledge. To debug, remove the above assert and
|
|
|
|
* rebuild. Look for branch stubs in the fixed section region.
|
|
|
|
*
|
|
|
|
* Linker stub generation could be allowed in "trampoline"
|
|
|
|
* sections if absolutely necessary, but this would require
|
|
|
|
* some rework of the fixed sections. Before resorting to this,
|
|
|
|
* consider references that have sufficient addressing range,
|
|
|
|
* (e.g., hand coded trampolines) so the linker does not have
|
|
|
|
* to add stubs.
|
|
|
|
*
|
|
|
|
* Linker stubs at the top of the main text section are currently not
|
|
|
|
* detected, and will result in a crash at boot due to offsets being
|
|
|
|
* wrong.
|
|
|
|
*/
|
2008-04-15 19:52:28 +00:00
|
|
|
.text : AT(ADDR(.text) - LOAD_OFFSET) {
|
2007-09-13 20:42:35 +00:00
|
|
|
ALIGN_FUNCTION();
|
2009-04-28 15:47:15 +00:00
|
|
|
/* careful! __ftr_alt_* sections need to be close to .text */
|
|
|
|
*(.text .fixup __ftr_alt_* .ref.text)
|
2006-03-28 12:15:54 +00:00
|
|
|
SCHED_TEXT
|
|
|
|
LOCK_TEXT
|
|
|
|
KPROBES_TEXT
|
2009-02-10 05:10:27 +00:00
|
|
|
IRQENTRY_TEXT
|
2016-03-25 21:22:05 +00:00
|
|
|
SOFTIRQENTRY_TEXT
|
powerpc: Ensure .mem(init|exit).text are within _stext/_etext
In our linker script we open code the list of text sections, because we
need to include the __ftr_alt sections, which are arch-specific.
This means we can't use TEXT_TEXT as defined in vmlinux.lds.h, and so we
don't have the MEM_KEEP() logic for memory hotplug sections.
If we build the kernel with the gold linker, and with CONFIG_MEMORY_HOTPLUG=y,
we see that functions marked __meminit can end up outside of the
_stext/_etext range, and also outside of _sinittext/_einittext, eg:
c000000000000000 T _stext
c0000000009e0000 A _etext
c0000000009e3f18 T hash__vmemmap_create_mapping
c000000000ca0000 T _sinittext
c000000000d00844 T _einittext
This causes them to not be recognised as text by is_kernel_text(), and
prevents them being patched by jump_label (and presumably ftrace/kprobes
etc.).
Fix it by adding MEM_KEEP() directives, mirroring what TEXT_TEXT does.
This isn't a problem when CONFIG_MEMORY_HOTPLUG=n, because we use the
standard INIT_TEXT_SECTION() and EXIT_TEXT macros from vmlinux.lds.h.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-09-15 05:11:59 +00:00
|
|
|
MEM_KEEP(init.text)
|
|
|
|
MEM_KEEP(exit.text)
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
#ifdef CONFIG_PPC32
|
|
|
|
*(.got1)
|
|
|
|
__got2_start = .;
|
|
|
|
*(.got2)
|
|
|
|
__got2_end = .;
|
|
|
|
#endif /* CONFIG_PPC32 */
|
|
|
|
|
2008-07-21 23:03:45 +00:00
|
|
|
} :kernel
|
2006-03-28 12:15:54 +00:00
|
|
|
|
2008-09-02 05:04:09 +00:00
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
_etext = .;
|
|
|
|
PROVIDE32 (etext = .);
|
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
/* Read-only data */
|
|
|
|
RODATA
|
|
|
|
|
2009-09-24 14:36:24 +00:00
|
|
|
EXCEPTION_TABLE(0)
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2008-07-21 23:03:45 +00:00
|
|
|
NOTES :kernel :notes
|
|
|
|
|
|
|
|
/* The dummy segment contents for the bug workaround mentioned above
|
|
|
|
near PHDRS. */
|
2008-07-25 00:08:41 +00:00
|
|
|
.dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
|
2009-01-02 10:46:04 +00:00
|
|
|
LONG(0)
|
|
|
|
LONG(0)
|
|
|
|
LONG(0)
|
2008-07-21 23:03:45 +00:00
|
|
|
} :kernel :dummy
|
2007-07-19 08:48:38 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
/*
|
|
|
|
* Init sections discarded at runtime
|
|
|
|
*/
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
__init_begin = .;
|
2009-09-24 14:36:24 +00:00
|
|
|
INIT_TEXT_SECTION(PAGE_SIZE) :kernel
|
2006-03-28 12:15:54 +00:00
|
|
|
|
|
|
|
/* .exit.text is discarded at runtime, not link time,
|
|
|
|
* to deal with references from __bug_table
|
|
|
|
*/
|
2008-04-15 19:52:28 +00:00
|
|
|
.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
|
2008-01-20 13:15:03 +00:00
|
|
|
EXIT_TEXT
|
|
|
|
}
|
2006-03-28 12:15:54 +00:00
|
|
|
|
2008-04-15 19:52:28 +00:00
|
|
|
.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
|
2008-01-20 13:15:03 +00:00
|
|
|
INIT_DATA
|
2006-03-28 12:15:54 +00:00
|
|
|
__vtop_table_begin = .;
|
|
|
|
*(.vtop_fixup);
|
|
|
|
__vtop_table_end = .;
|
|
|
|
__ptov_table_begin = .;
|
|
|
|
*(.ptov_fixup);
|
|
|
|
__ptov_table_end = .;
|
|
|
|
}
|
|
|
|
|
2008-04-15 19:52:28 +00:00
|
|
|
.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
INIT_SETUP(16)
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
|
|
|
|
2008-04-15 19:52:28 +00:00
|
|
|
.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
INIT_CALLS
|
|
|
|
}
|
2006-03-28 12:15:54 +00:00
|
|
|
|
2008-04-15 19:52:28 +00:00
|
|
|
.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
CON_INITCALL
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
SECURITY_INIT
|
|
|
|
|
|
|
|
. = ALIGN(8);
|
2008-04-15 19:52:28 +00:00
|
|
|
__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
|
2005-09-30 06:16:52 +00:00
|
|
|
__start___ftr_fixup = .;
|
|
|
|
*(__ftr_fixup)
|
|
|
|
__stop___ftr_fixup = .;
|
|
|
|
}
|
2008-07-01 15:16:40 +00:00
|
|
|
. = ALIGN(8);
|
2008-12-18 19:13:32 +00:00
|
|
|
__mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
|
|
|
|
__start___mmu_ftr_fixup = .;
|
|
|
|
*(__mmu_ftr_fixup)
|
|
|
|
__stop___mmu_ftr_fixup = .;
|
|
|
|
}
|
|
|
|
. = ALIGN(8);
|
2008-07-01 15:16:40 +00:00
|
|
|
__lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
|
|
|
|
__start___lwsync_fixup = .;
|
|
|
|
*(__lwsync_fixup)
|
|
|
|
__stop___lwsync_fixup = .;
|
|
|
|
}
|
2006-09-25 08:19:00 +00:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
. = ALIGN(8);
|
2008-04-15 19:52:28 +00:00
|
|
|
__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
|
2006-09-25 08:19:00 +00:00
|
|
|
__start___fw_ftr_fixup = .;
|
|
|
|
*(__fw_ftr_fixup)
|
|
|
|
__stop___fw_ftr_fixup = .;
|
|
|
|
}
|
|
|
|
#endif
|
2008-04-15 19:52:28 +00:00
|
|
|
.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
INIT_RAM_FS
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
2009-09-24 14:36:24 +00:00
|
|
|
|
2011-03-24 17:50:09 +00:00
|
|
|
PERCPU_SECTION(L1_CACHE_BYTES)
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
. = ALIGN(8);
|
2008-04-15 19:52:28 +00:00
|
|
|
.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
|
2006-03-28 12:15:54 +00:00
|
|
|
__machine_desc_start = . ;
|
|
|
|
*(.machine.desc)
|
|
|
|
__machine_desc_end = . ;
|
|
|
|
}
|
2008-10-22 18:43:45 +00:00
|
|
|
#ifdef CONFIG_RELOCATABLE
|
powerpc: Make the 64-bit kernel as a position-independent executable
This implements CONFIG_RELOCATABLE for 64-bit by making the kernel as
a position-independent executable (PIE) when it is set. This involves
processing the dynamic relocations in the image in the early stages of
booting, even if the kernel is being run at the address it is linked at,
since the linker does not necessarily fill in words in the image for
which there are dynamic relocations. (In fact the linker does fill in
such words for 64-bit executables, though not for 32-bit executables,
so in principle we could avoid calling relocate() entirely when we're
running a 64-bit kernel at the linked address.)
The dynamic relocations are processed by a new function relocate(addr),
where the addr parameter is the virtual address where the image will be
run. In fact we call it twice; once before calling prom_init, and again
when starting the main kernel. This means that reloc_offset() returns
0 in prom_init (since it has been relocated to the address it is running
at), which necessitated a few adjustments.
This also changes __va and __pa to use an equivalent definition that is
simpler. With the relocatable kernel, PAGE_OFFSET and MEMORY_START are
constants (for 64-bit) whereas PHYSICAL_START is a variable (and
KERNELBASE ideally should be too, but isn't yet).
With this, relocatable kernels still copy themselves down to physical
address 0 and run there.
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-30 01:43:47 +00:00
|
|
|
. = ALIGN(8);
|
2011-12-14 22:58:12 +00:00
|
|
|
.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
|
|
|
|
{
|
2016-07-13 01:14:40 +00:00
|
|
|
#ifdef CONFIG_PPC32
|
2011-12-14 22:58:12 +00:00
|
|
|
__dynamic_symtab = .;
|
|
|
|
#endif
|
|
|
|
*(.dynsym)
|
|
|
|
}
|
powerpc: Make the 64-bit kernel as a position-independent executable
This implements CONFIG_RELOCATABLE for 64-bit by making the kernel as
a position-independent executable (PIE) when it is set. This involves
processing the dynamic relocations in the image in the early stages of
booting, even if the kernel is being run at the address it is linked at,
since the linker does not necessarily fill in words in the image for
which there are dynamic relocations. (In fact the linker does fill in
such words for 64-bit executables, though not for 32-bit executables,
so in principle we could avoid calling relocate() entirely when we're
running a 64-bit kernel at the linked address.)
The dynamic relocations are processed by a new function relocate(addr),
where the addr parameter is the virtual address where the image will be
run. In fact we call it twice; once before calling prom_init, and again
when starting the main kernel. This means that reloc_offset() returns
0 in prom_init (since it has been relocated to the address it is running
at), which necessitated a few adjustments.
This also changes __va and __pa to use an equivalent definition that is
simpler. With the relocatable kernel, PAGE_OFFSET and MEMORY_START are
constants (for 64-bit) whereas PHYSICAL_START is a variable (and
KERNELBASE ideally should be too, but isn't yet).
With this, relocatable kernels still copy themselves down to physical
address 0 and run there.
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-30 01:43:47 +00:00
|
|
|
.dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
|
|
|
|
.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
|
|
|
|
{
|
|
|
|
__dynamic_start = .;
|
|
|
|
*(.dynamic)
|
|
|
|
}
|
|
|
|
.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
|
|
|
|
.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
|
|
|
|
.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
|
|
|
|
{
|
|
|
|
__rela_dyn_start = .;
|
|
|
|
*(.rela*)
|
|
|
|
}
|
2008-10-22 18:43:45 +00:00
|
|
|
#endif
|
2015-10-07 23:28:28 +00:00
|
|
|
/* .exit.data is discarded at runtime, not link time,
|
|
|
|
* to deal with references from .exit.text
|
|
|
|
*/
|
|
|
|
.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
|
|
|
|
EXIT_DATA
|
|
|
|
}
|
2006-03-28 12:15:54 +00:00
|
|
|
|
|
|
|
/* freed after init ends here */
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
__init_end = .;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* And now the various read/write data
|
|
|
|
*/
|
|
|
|
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
_sdata = .;
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2005-09-30 06:16:52 +00:00
|
|
|
#ifdef CONFIG_PPC32
|
2008-04-15 19:52:28 +00:00
|
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) {
|
2007-05-17 11:38:44 +00:00
|
|
|
DATA_DATA
|
2006-03-28 12:15:54 +00:00
|
|
|
*(.sdata)
|
|
|
|
*(.got.plt) *(.got)
|
|
|
|
}
|
2005-09-30 06:16:52 +00:00
|
|
|
#else
|
2008-04-15 19:52:28 +00:00
|
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) {
|
2007-06-17 02:29:04 +00:00
|
|
|
DATA_DATA
|
|
|
|
*(.data.rel*)
|
|
|
|
*(.toc1)
|
2006-03-28 12:15:54 +00:00
|
|
|
*(.branch_lt)
|
|
|
|
}
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2008-04-15 19:52:28 +00:00
|
|
|
.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
|
2006-03-28 12:15:54 +00:00
|
|
|
*(.opd)
|
|
|
|
}
|
|
|
|
|
2015-05-14 04:45:40 +00:00
|
|
|
. = ALIGN(256);
|
2008-04-15 19:52:28 +00:00
|
|
|
.got : AT(ADDR(.got) - LOAD_OFFSET) {
|
2006-03-28 12:15:54 +00:00
|
|
|
__toc_start = .;
|
2012-11-26 17:39:03 +00:00
|
|
|
#ifndef CONFIG_RELOCATABLE
|
|
|
|
__prom_init_toc_start = .;
|
|
|
|
arch/powerpc/kernel/prom_init.o*(.toc .got)
|
|
|
|
__prom_init_toc_end = .;
|
|
|
|
#endif
|
2006-03-28 12:15:54 +00:00
|
|
|
*(.got)
|
|
|
|
*(.toc)
|
|
|
|
}
|
2005-09-30 06:16:52 +00:00
|
|
|
#endif
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
/* The initial task and kernel stack */
|
2010-02-20 00:03:35 +00:00
|
|
|
INIT_TASK_DATA_SECTION(THREAD_SIZE)
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2010-02-20 00:03:37 +00:00
|
|
|
.data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
PAGE_ALIGNED_DATA(PAGE_SIZE)
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2010-02-20 00:03:34 +00:00
|
|
|
.data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2010-02-20 00:03:44 +00:00
|
|
|
.data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
READ_MOSTLY_DATA(L1_CACHE_BYTES)
|
2007-07-04 04:04:31 +00:00
|
|
|
}
|
|
|
|
|
2009-09-29 06:00:06 +00:00
|
|
|
. = ALIGN(PAGE_SIZE);
|
2008-04-15 19:52:28 +00:00
|
|
|
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
|
2009-09-24 14:36:24 +00:00
|
|
|
NOSAVE_DATA
|
2006-03-28 12:15:54 +00:00
|
|
|
}
|
2005-10-10 12:38:46 +00:00
|
|
|
|
2009-08-09 19:06:24 +00:00
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
_edata = .;
|
|
|
|
PROVIDE32 (edata = .);
|
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
/*
|
|
|
|
* And finally the bss
|
|
|
|
*/
|
|
|
|
|
2009-09-24 14:36:24 +00:00
|
|
|
BSS_SECTION(0, 0, 0)
|
2005-09-26 06:04:21 +00:00
|
|
|
|
2006-03-28 12:15:54 +00:00
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
_end = . ;
|
|
|
|
PROVIDE32 (end = .);
|
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 02:27:40 +00:00
|
|
|
|
|
|
|
/* Sections to be discarded. */
|
|
|
|
DISCARDS
|
2005-09-26 06:04:21 +00:00
|
|
|
}
|