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Merge 34eb62d868 ("Merge tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip") into android-mainline

Browse Source 
Steps on the way to 5.10-rc1

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic605c3794555d23d61243eb344002827e7089076
This commit is contained in:
Greg Kroah-Hartman
2020-10-21 10:58:09 +02:00
parent c75d00fcaf 34eb62d868
commit 43105055d5
37 changed files with 263 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/alpha/kernel/vmlinux.lds.S
+1
View File
@@ -72,6 +72,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/arc/kernel/vmlinux.lds.S
+1
View File
@@ -122,6 +122,7 @@ SECTIONS
_end = . ;
STABS_DEBUG
ELF_DETAILS
DISCARDS
.arcextmap 0 : {
arch/arm/Makefile
+4
View File
@@ -16,6 +16,10 @@ LDFLAGS_vmlinux += --be8
KBUILD_LDFLAGS_MODULE += --be8
endif
# We never want expected sections to be placed heuristically by the
# linker. All sections should be explicitly named in the linker script.
LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
ifeq ($(CONFIG_ARM_MODULE_PLTS),y)
KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds
endif
arch/arm/boot/compressed/Makefile
+2
View File
@@ -123,6 +123,8 @@ endif
LDFLAGS_vmlinux += --no-undefined
# Delete all temporary local symbols
LDFLAGS_vmlinux += -X
# Report orphan sections
LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
# Next argument is a linker script
LDFLAGS_vmlinux += -T
arch/arm/boot/compressed/vmlinux.lds.S
+10 -10
View File
@@ -2,6 +2,7 @@
/*
* Copyright (C) 2000 Russell King
*/
#include <asm/vmlinux.lds.h>
#ifdef CONFIG_CPU_ENDIAN_BE8
#define ZIMAGE_MAGIC(x) ( (((x) >> 24) & 0x000000ff) | \
@@ -17,8 +18,11 @@ ENTRY(_start)
SECTIONS
{
/DISCARD/ : {
COMMON_DISCARDS
*(.ARM.exidx*)
*(.ARM.extab*)
*(.note.*)
*(.rel.*)
/*
* Discard any r/w data - this produces a link error if we have any,
* which is required for PIC decompression. Local data generates
@@ -36,9 +40,7 @@ SECTIONS
*(.start)
*(.text)
*(.text.*)
*(.gnu.warning)
*(.glue_7t)
*(.glue_7)
ARM_STUBS_TEXT
}
.table : ALIGN(4) {
_table_start = .;
@@ -128,12 +130,10 @@ SECTIONS
PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
PROVIDE(__pecoff_end = ALIGN(512));
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
STABS_DEBUG
DWARF_DEBUG
ARM_DETAILS
ARM_ASSERTS
}
ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");
arch/arm/kernel/vmlinux.lds.h → arch/arm/include/asm/vmlinux.lds.h
+25 -5
View File
@@ -1,4 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <asm-generic/vmlinux.lds.h>
#ifdef CONFIG_HOTPLUG_CPU
#define ARM_CPU_DISCARD(x)
@@ -49,8 +50,29 @@
EXIT_CALL \
ARM_MMU_DISCARD(*(.text.fixup)) \
ARM_MMU_DISCARD(*(__ex_table)) \
*(.discard) \
*(.discard.*)
COMMON_DISCARDS
/*
* Sections that should stay zero sized, which is safer to explicitly
* check instead of blindly discarding.
*/
#define ARM_ASSERTS \
.plt : { \
*(.iplt) *(.rel.iplt) *(.iplt) *(.igot.plt) \
} \
ASSERT(SIZEOF(.plt) == 0, \
"Unexpected run-time procedure linkages detected!")
#define ARM_DETAILS \
ELF_DETAILS \
.ARM.attributes 0 : { *(.ARM.attributes) }
#define ARM_STUBS_TEXT \
*(.gnu.warning) \
*(.glue_7) \
*(.glue_7t) \
*(.vfp11_veneer) \
*(.v4_bx)
#define ARM_TEXT \
IDMAP_TEXT \
@@ -64,9 +86,7 @@
CPUIDLE_TEXT \
LOCK_TEXT \
KPROBES_TEXT \
*(.gnu.warning) \
*(.glue_7) \
*(.glue_7t) \
ARM_STUBS_TEXT \
. = ALIGN(4); \
*(.got) /* Global offset table */ \
ARM_CPU_KEEP(PROC_INFO)
arch/arm/kernel/vmlinux-xip.lds.S
+5 -3
View File
@@ -9,15 +9,13 @@
#include <linux/sizes.h>
#include <asm-generic/vmlinux.lds.h>
#include <asm/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/mpu.h>
#include <asm/page.h>
#include "vmlinux.lds.h"
OUTPUT_ARCH(arm)
ENTRY(stext)
@@ -152,6 +150,10 @@ SECTIONS
_end = .;
STABS_DEBUG
DWARF_DEBUG
ARM_DETAILS
ARM_ASSERTS
}
/*
arch/arm/kernel/vmlinux.lds.S
+5 -3
View File
@@ -9,15 +9,13 @@
#else
#include <linux/pgtable.h>
#include <asm-generic/vmlinux.lds.h>
#include <asm/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/mpu.h>
#include <asm/page.h>
#include "vmlinux.lds.h"
OUTPUT_ARCH(arm)
ENTRY(stext)
@@ -151,6 +149,10 @@ SECTIONS
_end = .;
STABS_DEBUG
DWARF_DEBUG
ARM_DETAILS
ARM_ASSERTS
}
#ifdef CONFIG_STRICT_KERNEL_RWX
arch/arm64/Makefile
+8 -1
View File
@@ -28,6 +28,10 @@ LDFLAGS_vmlinux += --fix-cortex-a53-843419
endif
endif
# We never want expected sections to be placed heuristically by the
# linker. All sections should be explicitly named in the linker script.
LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y)
ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y)
$(warning LSE atomics not supported by binutils)
@@ -46,13 +50,16 @@ endif
KBUILD_CFLAGS += -mgeneral-regs-only \
$(compat_vdso) $(cc_has_k_constraint)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS += $(call cc-disable-warning, psabi)
KBUILD_AFLAGS += $(compat_vdso)
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
# Avoid generating .eh_frame* sections.
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
prepare: stack_protector_prepare
stack_protector_prepare: prepare0
arch/arm64/kernel/smccc-call.S
-2
View File
@@ -9,7 +9,6 @@
#include <asm/assembler.h>
.macro SMCCC instr
.cfi_startproc
\instr #0
ldr x4, [sp]
stp x0, x1, [x4, #ARM_SMCCC_RES_X0_OFFS]
@@ -21,7 +20,6 @@
b.ne 1f
str x6, [x4, ARM_SMCCC_QUIRK_STATE_OFFS]
1: ret
.cfi_endproc
.endm
/*
arch/arm64/kernel/vmlinux.lds.S
+24 -4
View File
@@ -6,6 +6,7 @@
*/
#define RO_EXCEPTION_TABLE_ALIGN 8
#define RUNTIME_DISCARD_EXIT
#include <asm-generic/vmlinux.lds.h>
#include <asm/cache.h>
@@ -96,13 +97,10 @@ SECTIONS
* matching the same input section name. There is no documented
* order of matching.
*/
DISCARDS
/DISCARD/ : {
EXIT_CALL
*(.discard)
*(.discard.*)
*(.interp .dynamic)
*(.dynsym .dynstr .hash .gnu.hash)
*(.eh_frame)
}
. = KIMAGE_VADDR;
@@ -131,6 +129,14 @@ SECTIONS
*(.got) /* Global offset table */
}
/*
* Make sure that the .got.plt is either completely empty or it
* contains only the lazy dispatch entries.
*/
.got.plt : { *(.got.plt) }
ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18,
"Unexpected GOT/PLT entries detected!")
. = ALIGN(SEGMENT_ALIGN);
_etext = .; /* End of text section */
@@ -249,8 +255,22 @@ SECTIONS
_end = .;
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
HEAD_SYMBOLS
/*
* Sections that should stay zero sized, which is safer to
* explicitly check instead of blindly discarding.
*/
.plt : {
*(.plt) *(.plt.*) *(.iplt) *(.igot)
}
ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
.data.rel.ro : { *(.data.rel.ro) }
ASSERT(SIZEOF(.data.rel.ro) == 0, "Unexpected RELRO detected!")
}
#include "image-vars.h"
arch/arm64/mm/mmu.c
+1 -1
View File
@@ -43,7 +43,7 @@
u64 idmap_t0sz = TCR_T0SZ(VA_BITS);
u64 idmap_ptrs_per_pgd = PTRS_PER_PGD;
u64 __section(".mmuoff.data.write") vabits_actual;
u64 __section(.mmuoff.data.write) vabits_actual;
EXPORT_SYMBOL(vabits_actual);
u64 kimage_voffset __ro_after_init;
arch/csky/kernel/vmlinux.lds.S
+1
View File
@@ -109,6 +109,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/hexagon/kernel/vmlinux.lds.S
+1
View File
@@ -67,5 +67,6 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
}
arch/ia64/kernel/vmlinux.lds.S
+1
View File
@@ -218,6 +218,7 @@ SECTIONS {
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
/* Default discards */
DISCARDS
arch/mips/kernel/vmlinux.lds.S
+1
View File
@@ -202,6 +202,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
/* These must appear regardless of . */
.gptab.sdata : {
arch/nds32/kernel/vmlinux.lds.S
+1
View File
@@ -64,6 +64,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/nios2/kernel/vmlinux.lds.S
+1
View File
@@ -58,6 +58,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/openrisc/kernel/vmlinux.lds.S
+1
View File
@@ -103,6 +103,7 @@ SECTIONS
/* Throw in the debugging sections */
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
/* Sections to be discarded -- must be last */
DISCARDS
arch/parisc/boot/compressed/vmlinux.lds.S
+1
View File
@@ -84,6 +84,7 @@ SECTIONS
}
STABS_DEBUG
ELF_DETAILS
.note 0 : { *(.note) }
/* Sections to be discarded */
arch/parisc/kernel/vmlinux.lds.S
+1
View File
@@ -164,6 +164,7 @@ SECTIONS
_end = . ;
STABS_DEBUG
ELF_DETAILS
.note 0 : { *(.note) }
/* Sections to be discarded */
arch/powerpc/kernel/vmlinux.lds.S
+1 -1
View File
@@ -360,8 +360,8 @@ SECTIONS
PROVIDE32 (end = .);
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
/DISCARD/ : {
arch/riscv/kernel/vmlinux.lds.S
+1
View File
@@ -98,6 +98,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/s390/kernel/vmlinux.lds.S
+1
View File
@@ -181,6 +181,7 @@ SECTIONS
/* Debugging sections. */
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
/* Sections to be discarded */
DISCARDS
arch/sh/kernel/vmlinux.lds.S
+1
View File
@@ -76,6 +76,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/sparc/kernel/vmlinux.lds.S
+1
View File
@@ -187,6 +187,7 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/um/kernel/dyn.lds.S
+1 -1
View File
@@ -164,8 +164,8 @@ SECTIONS
PROVIDE (end = .);
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/um/kernel/uml.lds.S
+1 -1
View File
@@ -108,8 +108,8 @@ SECTIONS
PROVIDE (end = .);
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
arch/x86/Makefile
+4
View File
@@ -209,6 +209,10 @@ ifdef CONFIG_X86_64
LDFLAGS_vmlinux += -z max-page-size=0x200000
endif
# We never want expected sections to be placed heuristically by the
# linker. All sections should be explicitly named in the linker script.
LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
archscripts: scripts_basic
$(Q)$(MAKE) $(build)=arch/x86/tools relocs
arch/x86/boot/compressed/Makefile
+4 -2
View File
@@ -29,7 +29,7 @@ targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst
KBUILD_CFLAGS := -m$(BITS) -O2
KBUILD_CFLAGS += -fno-strict-aliasing $(call cc-option, -fPIE, -fPIC)
KBUILD_CFLAGS += -fno-strict-aliasing -fPIE
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small
@@ -43,18 +43,20 @@ KBUILD_CFLAGS += -Wno-pointer-sign
KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS += -D__DISABLE_EXPORTS
KBUILD_CFLAGS += -include $(srctree)/$(src)/hidden.h
# Disable relocation relaxation in case the link is not PIE.
KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no)
KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
GCOV_PROFILE := n
UBSAN_SANITIZE :=n
KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info)
# Compressed kernel should be built as PIE since it may be loaded at any
# address by the bootloader.
LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker)
LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
LDFLAGS_vmlinux += -T
hostprogs := mkpiggy
arch/x86/boot/compressed/vmlinux.lds.S
+40 -18
View File
@@ -42,19 +42,6 @@ SECTIONS
*(.rodata.*)
_erodata = . ;
}
.rel.dyn : {
*(.rel.*)
}
.rela.dyn : {
*(.rela.*)
}
.got : {
*(.got)
}
.got.plt : {
*(.got.plt)
}
.data : {
_data = . ;
*(.data)
@@ -82,14 +69,49 @@ SECTIONS
. = ALIGN(PAGE_SIZE); /* keep ZO size page aligned */
_end = .;
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
/DISCARD/ : {
*(.dynamic) *(.dynsym) *(.dynstr) *(.dynbss)
*(.hash) *(.gnu.hash)
*(.note.*)
}
ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")
.got.plt (INFO) : {
*(.got.plt)
}
ASSERT(SIZEOF(.got.plt) == 0 ||
#ifdef CONFIG_X86_64
ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
SIZEOF(.got.plt) == 0x18,
#else
ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0xc, "Unexpected GOT/PLT entries detected!")
SIZEOF(.got.plt) == 0xc,
#endif
"Unexpected GOT/PLT entries detected!")
ASSERT(SIZEOF(.rel.dyn) == 0 && SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations detected!")
/*
* Sections that should stay zero sized, which is safer to
* explicitly check instead of blindly discarding.
*/
.got : {
*(.got)
}
ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")
.plt : {
*(.plt) *(.plt.*)
}
ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
.rel.dyn : {
*(.rel.*) *(.rel_*)
}
ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
.rela.dyn : {
*(.rela.*) *(.rela_*)
}
ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
}
arch/x86/include/asm/asm.h
+5 -1
View File
@@ -141,11 +141,15 @@
# define _ASM_EXTABLE_FAULT(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
# define _ASM_NOKPROBE(entry) \
# ifdef CONFIG_KPROBES
# define _ASM_NOKPROBE(entry) \
.pushsection "_kprobe_blacklist","aw" ; \
_ASM_ALIGN ; \
_ASM_PTR (entry); \
.popsection
# else
# define _ASM_NOKPROBE(entry)
# endif
#else /* ! __ASSEMBLY__ */
# define _EXPAND_EXTABLE_HANDLE(x) #x
arch/x86/kernel/vmlinux.lds.S
+38 -1
View File
@@ -411,10 +411,47 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
ELF_DETAILS
DISCARDS
}
/*
* Make sure that the .got.plt is either completely empty or it
* contains only the lazy dispatch entries.
*/
.got.plt (INFO) : { *(.got.plt) }
ASSERT(SIZEOF(.got.plt) == 0 ||
#ifdef CONFIG_X86_64
SIZEOF(.got.plt) == 0x18,
#else
SIZEOF(.got.plt) == 0xc,
#endif
"Unexpected GOT/PLT entries detected!")
/*
* Sections that should stay zero sized, which is safer to
* explicitly check instead of blindly discarding.
*/
.got : {
*(.got) *(.igot.*)
}
ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")
.plt : {
*(.plt) *(.plt.*) *(.iplt)
}
ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
.rel.dyn : {
*(.rel.*) *(.rel_*)
}
ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
.rela.dyn : {
*(.rela.*) *(.rela_*)
}
ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
}
#ifdef CONFIG_X86_32
/*
drivers/firmware/efi/libstub/Makefile
+9 -2
View File
@@ -18,7 +18,8 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \
# arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
# disable the stackleak plugin
cflags-$(CONFIG_ARM64) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
-fpie $(DISABLE_STACKLEAK_PLUGIN)
-fpie $(DISABLE_STACKLEAK_PLUGIN) \
$(call cc-option,-mbranch-protection=none)
cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
-fno-builtin -fpic \
$(call cc-option,-mno-single-pic-base)
@@ -26,7 +27,7 @@ cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt
KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
-include $(srctree)/drivers/firmware/efi/libstub/hidden.h \
-include $(srctree)/include/linux/hidden.h \
-D__NO_FORTIFY \
-ffreestanding \
-fno-stack-protector \
@@ -65,6 +66,12 @@ lib-$(CONFIG_ARM64) += arm64-stub.o
lib-$(CONFIG_X86) += x86-stub.o
CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Even when -mbranch-protection=none is set, Clang will generate a
# .note.gnu.property for code-less object files (like lib/ctype.c),
# so work around this by explicitly removing the unwanted section.
# https://bugs.llvm.org/show_bug.cgi?id=46480
STUBCOPY_FLAGS-y += --remove-section=.note.gnu.property
#
# For x86, bootloaders like systemd-boot or grub-efi do not zero-initialize the
# .bss section, so the .bss section of the EFI stub needs to be included in the
drivers/firmware/efi/libstub/hidden.h
-6
View File
@@ -1,6 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* To prevent the compiler from emitting GOT-indirected (and thus absolute)
* references to any global symbols, override their visibility as 'hidden'
*/
#pragma GCC visibility push(hidden)
include/asm-generic/vmlinux.lds.h
+42 -7
View File
@@ -34,6 +34,7 @@
*
* STABS_DEBUG
* DWARF_DEBUG
* ELF_DETAILS
*
* DISCARDS // must be the last
* }
@@ -581,7 +582,10 @@
*/
#define TEXT_TEXT \
ALIGN_FUNCTION(); \
*(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
*(.text.hot .text.hot.*) \
*(TEXT_MAIN .text.fixup) \
*(.text.unlikely .text.unlikely.*) \
*(.text.unknown .text.unknown.*) \
NOINSTR_TEXT \
*(.text..refcount) \
*(.ref.text) \
@@ -812,15 +816,21 @@
.debug_macro 0 : { *(.debug_macro) } \
.debug_addr 0 : { *(.debug_addr) }
/* Stabs debugging sections. */
/* Stabs debugging sections. */
#define STABS_DEBUG \
.stab 0 : { *(.stab) } \
.stabstr 0 : { *(.stabstr) } \
.stab.excl 0 : { *(.stab.excl) } \
.stab.exclstr 0 : { *(.stab.exclstr) } \
.stab.index 0 : { *(.stab.index) } \
.stab.indexstr 0 : { *(.stab.indexstr) } \
.comment 0 : { *(.comment) }
.stab.indexstr 0 : { *(.stab.indexstr) }
/* Required sections not related to debugging. */
#define ELF_DETAILS \
.comment 0 : { *(.comment) } \
.symtab 0 : { *(.symtab) } \
.strtab 0 : { *(.strtab) } \
.shstrtab 0 : { *(.shstrtab) }
#ifdef CONFIG_GENERIC_BUG
#define BUG_TABLE \
@@ -955,13 +965,38 @@
EXIT_DATA
#endif
/*
* Clang's -fsanitize=kernel-address and -fsanitize=thread produce
* unwanted sections (.eh_frame and .init_array.*), but
* CONFIG_CONSTRUCTORS wants to keep any .init_array.* sections.
* https://bugs.llvm.org/show_bug.cgi?id=46478
*/
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
# ifdef CONFIG_CONSTRUCTORS
# define SANITIZER_DISCARDS \
*(.eh_frame)
# else
# define SANITIZER_DISCARDS \
*(.init_array) *(.init_array.*) \
*(.eh_frame)
# endif
#else
# define SANITIZER_DISCARDS
#endif
#define COMMON_DISCARDS \
SANITIZER_DISCARDS \
*(.discard) \
*(.discard.*) \
*(.modinfo) \
/* ld.bfd warns about .gnu.version* even when not emitted */ \
*(.gnu.version*) \
#define DISCARDS \
/DISCARD/ : { \
EXIT_DISCARDS \
EXIT_CALL \
*(.discard) \
*(.discard.*) \
*(.modinfo) \
COMMON_DISCARDS \
}
/**
include/linux/hidden.h
+19
View File
@@ -0,0 +1,19 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* When building position independent code with GCC using the -fPIC option,
* (or even the -fPIE one on older versions), it will assume that we are
* building a dynamic object (either a shared library or an executable) that
* may have symbol references that can only be resolved at load time. For a
* variety of reasons (ELF symbol preemption, the CoW footprint of the section
* that is modified by the loader), this results in all references to symbols
* with external linkage to go via entries in the Global Offset Table (GOT),
* which carries absolute addresses which need to be fixed up when the
* executable image is loaded at an offset which is different from its link
* time offset.
*
* Fortunately, there is a way to inform the compiler that such symbol
* references will be satisfied at link time rather than at load time, by
* giving them 'hidden' visibility.
*/
#pragma GCC visibility push(hidden)