linux-brain/arch/m68k/kernel/vmlinux-nommu.lds
Greg Ungerer 969de0988b m68k: add missing SOFTIRQENTRY_TEXT linker section
Commit be7635e728 ("arch, ftrace: for KASAN put hard/soft IRQ entries
into separate sections") added a new linker section, SOFTIRQENTRY_TEXT,
to the linker scripts for most architectures. It didn't add it to any of
the linker scripts for the m68k architecture. This was not really a problem
because it is only defined if either of CONFIG_FUNCTION_GRAPH_TRACER or
CONFIG_KASAN are enabled - which can never be true for m68k.

However commit 229a718605 ("irq: Make the irqentry text section
unconditional") means that SOFTIRQENTRY_TEXT is now always defined. So on
m68k we now end up with a separate ELF section for .softirqentry.text
instead of it being part of the .text section. On some m68k targets in some
configurations this can also cause a fatal link error:

  LD      vmlinux
/usr/local/bin/../m68k-uclinux/bin/ld.real: section .softirqentry.text loaded at [0000000010de10c0,0000000010de12dd] overlaps section .rodata loaded at [0000000010de10c0,0000000010e0fd67]

To fix add in the missing SOFTIRQENTRY_TEXT section into the m68k linker
scripts. I noticed that m68k is also missing the IRQENTRY_TEXT section,
so this patch also adds an entry for that too.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
2017-12-04 10:15:18 +10:00

96 lines
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* vmlinux.lds.S -- master linker script for m68knommu arch
*
* (C) Copyright 2002-2012, Greg Ungerer <gerg@snapgear.com>
*
* This linker script is equipped to build either ROM loaded or RAM
* run kernels.
*/
#if defined(CONFIG_RAMKERNEL)
#define KTEXT_ADDR CONFIG_KERNELBASE
#endif
#if defined(CONFIG_ROMKERNEL)
#define KTEXT_ADDR CONFIG_ROMSTART
#define KDATA_ADDR CONFIG_KERNELBASE
#define LOAD_OFFSET KDATA_ADDR + (ADDR(.text) + SIZEOF(.text))
#endif
#include <asm/page.h>
#include <asm/thread_info.h>
#include <asm-generic/vmlinux.lds.h>
OUTPUT_ARCH(m68k)
ENTRY(_start)
jiffies = jiffies_64 + 4;
SECTIONS {
#ifdef CONFIG_ROMVEC
. = CONFIG_ROMVEC;
.romvec : {
__rom_start = .;
_romvec = .;
*(.romvec)
*(.data..initvect)
}
#endif
. = KTEXT_ADDR;
_text = .;
_stext = .;
.text : {
HEAD_TEXT
TEXT_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
SCHED_TEXT
CPUIDLE_TEXT
LOCK_TEXT
*(.fixup)
. = ALIGN(16);
}
_etext = .;
#ifdef KDATA_ADDR
. = KDATA_ADDR;
#endif
_sdata = .;
RO_DATA_SECTION(PAGE_SIZE)
RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE)
_edata = .;
EXCEPTION_TABLE(16)
NOTES
. = ALIGN(PAGE_SIZE);
__init_begin = .;
INIT_TEXT_SECTION(PAGE_SIZE)
INIT_DATA_SECTION(16)
PERCPU_SECTION(16)
.m68k_fixup : {
__start_fixup = .;
*(.m68k_fixup)
__stop_fixup = .;
}
.init.data : {
. = ALIGN(PAGE_SIZE);
__init_end = .;
}
BSS_SECTION(0, 0, 0)
_end = .;
STABS_DEBUG
.comment 0 : { *(.comment) }
/* Sections to be discarded */
DISCARDS
}