linux/arch/blackfin/kernel/vmlinux.lds.S
Alexander Potapenko be7635e728 arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.

Move the definition of __irq_entry to <linux/interrupt.h> so that the
users don't need to pull in <linux/ftrace.h>.  Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.

Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-25 16:37:42 -07:00

269 lines
4.8 KiB
ArmAsm

/*
* Copyright 2004-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later
*/
#include <asm-generic/vmlinux.lds.h>
#include <asm/mem_map.h>
#include <asm/page.h>
#include <asm/thread_info.h>
OUTPUT_FORMAT("elf32-bfin")
ENTRY(__start)
_jiffies = _jiffies_64;
SECTIONS
{
#ifdef CONFIG_RAMKERNEL
. = CONFIG_BOOT_LOAD;
#else
. = CONFIG_ROM_BASE;
#endif
/* Neither the text, ro_data or bss section need to be aligned
* So pack them back to back
*/
.text :
{
__text = .;
_text = .;
__stext = .;
TEXT_TEXT
#ifndef CONFIG_SCHEDULE_L1
SCHED_TEXT
#endif
LOCK_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
KPROBES_TEXT
#ifdef CONFIG_ROMKERNEL
__sinittext = .;
INIT_TEXT
__einittext = .;
EXIT_TEXT
#endif
*(.text.*)
*(.fixup)
#if !L1_CODE_LENGTH
*(.l1.text)
#endif
__etext = .;
}
EXCEPTION_TABLE(4)
NOTES
/* Just in case the first read only is a 32-bit access */
RO_DATA(4)
__rodata_end = .;
#ifdef CONFIG_ROMKERNEL
. = CONFIG_BOOT_LOAD;
.bss : AT(__rodata_end)
#else
.bss :
#endif
{
. = ALIGN(4);
___bss_start = .;
*(.bss .bss.*)
*(COMMON)
#if !L1_DATA_A_LENGTH
*(.l1.bss)
#endif
#if !L1_DATA_B_LENGTH
*(.l1.bss.B)
#endif
. = ALIGN(4);
___bss_stop = .;
}
#if defined(CONFIG_ROMKERNEL)
.data : AT(LOADADDR(.bss) + SIZEOF(.bss))
#else
.data :
#endif
{
__sdata = .;
/* This gets done first, so the glob doesn't suck it in */
CACHELINE_ALIGNED_DATA(32)
#if !L1_DATA_A_LENGTH
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
*(.l1.data)
#endif
#if !L1_DATA_B_LENGTH
*(.l1.data.B)
#endif
#if !L2_LENGTH
. = ALIGN(32);
*(.data_l2.cacheline_aligned)
*(.l2.data)
#endif
DATA_DATA
CONSTRUCTORS
INIT_TASK_DATA(THREAD_SIZE)
__edata = .;
}
__data_lma = LOADADDR(.data);
__data_len = SIZEOF(.data);
/* The init section should be last, so when we free it, it goes into
* the general memory pool, and (hopefully) will decrease fragmentation
* a tiny bit. The init section has a _requirement_ that it be
* PAGE_SIZE aligned
*/
. = ALIGN(PAGE_SIZE);
___init_begin = .;
#ifdef CONFIG_RAMKERNEL
INIT_TEXT_SECTION(PAGE_SIZE)
/* We have to discard exit text and such at runtime, not link time, to
* handle embedded cross-section references (alt instructions, bug
* table, eh_frame, etc...). We need all of our .text up front and
* .data after it for PCREL call issues.
*/
.exit.text :
{
EXIT_TEXT
}
. = ALIGN(16);
INIT_DATA_SECTION(16)
PERCPU_SECTION(32)
.exit.data :
{
EXIT_DATA
}
.text_l1 L1_CODE_START : AT(LOADADDR(.exit.data) + SIZEOF(.exit.data))
#else
.init.data : AT(__data_lma + __data_len + 32)
{
__sinitdata = .;
INIT_DATA
INIT_SETUP(16)
INIT_CALLS
CON_INITCALL
SECURITY_INITCALL
INIT_RAM_FS
. = ALIGN(PAGE_SIZE);
___per_cpu_load = .;
PERCPU_INPUT(32)
EXIT_DATA
__einitdata = .;
}
__init_data_lma = LOADADDR(.init.data);
__init_data_len = SIZEOF(.init.data);
__init_data_end = .;
.text_l1 L1_CODE_START : AT(__init_data_lma + __init_data_len)
#endif
{
. = ALIGN(4);
__stext_l1 = .;
*(.l1.text.head)
*(.l1.text)
#ifdef CONFIG_SCHEDULE_L1
SCHED_TEXT
#endif
. = ALIGN(4);
__etext_l1 = .;
}
__text_l1_lma = LOADADDR(.text_l1);
__text_l1_len = SIZEOF(.text_l1);
ASSERT (__text_l1_len <= L1_CODE_LENGTH, "L1 text overflow!")
.data_l1 L1_DATA_A_START : AT(__text_l1_lma + __text_l1_len)
{
. = ALIGN(4);
__sdata_l1 = .;
*(.l1.data)
__edata_l1 = .;
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
. = ALIGN(4);
__sbss_l1 = .;
*(.l1.bss)
. = ALIGN(4);
__ebss_l1 = .;
}
__data_l1_lma = LOADADDR(.data_l1);
__data_l1_len = SIZEOF(.data_l1);
ASSERT (__data_l1_len <= L1_DATA_A_LENGTH, "L1 data A overflow!")
.data_b_l1 L1_DATA_B_START : AT(__data_l1_lma + __data_l1_len)
{
. = ALIGN(4);
__sdata_b_l1 = .;
*(.l1.data.B)
__edata_b_l1 = .;
. = ALIGN(4);
__sbss_b_l1 = .;
*(.l1.bss.B)
. = ALIGN(4);
__ebss_b_l1 = .;
}
__data_b_l1_lma = LOADADDR(.data_b_l1);
__data_b_l1_len = SIZEOF(.data_b_l1);
ASSERT (__data_b_l1_len <= L1_DATA_B_LENGTH, "L1 data B overflow!")
.text_data_l2 L2_START : AT(__data_b_l1_lma + __data_b_l1_len)
{
. = ALIGN(4);
__stext_l2 = .;
*(.l2.text)
. = ALIGN(4);
__etext_l2 = .;
. = ALIGN(4);
__sdata_l2 = .;
*(.l2.data)
__edata_l2 = .;
. = ALIGN(32);
*(.data_l2.cacheline_aligned)
. = ALIGN(4);
__sbss_l2 = .;
*(.l2.bss)
. = ALIGN(4);
__ebss_l2 = .;
}
__l2_lma = LOADADDR(.text_data_l2);
__l2_len = SIZEOF(.text_data_l2);
ASSERT (__l2_len <= L2_LENGTH, "L2 overflow!")
/* Force trailing alignment of our init section so that when we
* free our init memory, we don't leave behind a partial page.
*/
#ifdef CONFIG_RAMKERNEL
. = __l2_lma + __l2_len;
#else
. = __init_data_end;
#endif
. = ALIGN(PAGE_SIZE);
___init_end = .;
__end =.;
STABS_DEBUG
DWARF_DEBUG
DISCARDS
}