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x86: make section delimiter symbols part of their section

Browse source 
Impact: cleanup

Move the symbols delimiting a section part of the section
(section relative) rather than absolute.  This avoids any
unexpected gaps between the section-start symbol and the first
data in the section, which could be caused by implicit
alignment of the section data.  It also makes the general
form of vmlinux_64.lds.S consistent with vmlinux_32.lds.S.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Jeremy Fitzhardinge 2009-03-10 11:19:18 -07:00 committed by H. Peter Anvin
parent c550033ced
commit b9719a4d9c
1 changed files with 45 additions and 40 deletions
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85
arch/x86/kernel/vmlinux_64.lds.S
View file

@ -29,8 +29,8 @@ SECTIONS
{
. = __START_KERNEL;
phys_startup_64 = startup_64 - LOAD_OFFSET;
_text = .; /* Text and read-only data */
.text : AT(ADDR(.text) - LOAD_OFFSET) {
_text = .; /* Text and read-only data */
/* First the code that has to be first for bootstrapping */
*(.text.head)
_stext = .;
@ -61,13 +61,13 @@ SECTIONS
.data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
CONSTRUCTORS
_edata = .; /* End of data section */
} :data
_edata = .; /* End of data section */
. = ALIGN(PAGE_SIZE);
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
*(.data.cacheline_aligned)
}
. = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
@ -125,29 +125,29 @@ SECTIONS
#undef VVIRT_OFFSET
#undef VVIRT
. = ALIGN(THREAD_SIZE); /* init_task */
.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
. = ALIGN(THREAD_SIZE); /* init_task */
*(.data.init_task)
}:data.init
. = ALIGN(PAGE_SIZE);
.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
*(.data.page_aligned)
}
/* might get freed after init */
. = ALIGN(PAGE_SIZE);
__smp_alt_begin = .;
__smp_locks = .;
.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
/* might get freed after init */
. = ALIGN(PAGE_SIZE);
__smp_alt_begin = .;
__smp_locks = .;
*(.smp_locks)
__smp_locks_end = .;
. = ALIGN(PAGE_SIZE);
__smp_alt_end = .;
}
__smp_locks_end = .;
. = ALIGN(PAGE_SIZE);
__smp_alt_end = .;
. = ALIGN(PAGE_SIZE); /* Init code and data */
__init_begin = .;
__init_begin = .; /* paired with __init_end */
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
_sinittext = .;
INIT_TEXT
@ -159,40 +159,42 @@ SECTIONS
__initdata_end = .;
}
. = ALIGN(16);
__setup_start = .;
.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
__setup_end = .;
__initcall_start = .;
.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
. = ALIGN(16);
__setup_start = .;
*(.init.setup)
__setup_end = .;
}
.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
__initcall_start = .;
INITCALLS
__initcall_end = .;
}
__initcall_end = .;
__con_initcall_start = .;
.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
}
__con_initcall_end = .;
__x86_cpu_dev_start = .;
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
__x86_cpu_dev_start = .;
*(.x86_cpu_dev.init)
__x86_cpu_dev_end = .;
}
__x86_cpu_dev_end = .;
SECURITY_INIT
. = ALIGN(8);
.parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
__parainstructions = .;
__parainstructions = .;
*(.parainstructions)
__parainstructions_end = .;
__parainstructions_end = .;
}
. = ALIGN(8);
__alt_instructions = .;
.altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
. = ALIGN(8);
__alt_instructions = .;
*(.altinstructions)
__alt_instructions_end = .;
}
__alt_instructions_end = .;
.altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
*(.altinstr_replacement)
}
@ -207,9 +209,11 @@ SECTIONS
#ifdef CONFIG_BLK_DEV_INITRD
. = ALIGN(PAGE_SIZE);
__initramfs_start = .;
.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
__initramfs_end = .;
.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
__initramfs_start = .;
*(.init.ramfs)
__initramfs_end = .;
}
#endif
#ifdef CONFIG_SMP
@ -229,20 +233,21 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__init_end = .;
. = ALIGN(PAGE_SIZE);
__nosave_begin = .;
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
*(.data.nosave)
. = ALIGN(PAGE_SIZE);
__nosave_begin = .;
*(.data.nosave)
. = ALIGN(PAGE_SIZE);
__nosave_end = .;
} :data.init2 /* use another section data.init2, see PERCPU_VADDR() above */
. = ALIGN(PAGE_SIZE);
__nosave_end = .;
__bss_start = .; /* BSS */
.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
. = ALIGN(PAGE_SIZE);
__bss_start = .; /* BSS */
*(.bss.page_aligned)
*(.bss)
}
__bss_stop = .;
__bss_stop = .;
}
_end = . ;