diff --git a/Makefile b/Makefile index 3e3ca2c7b8b8..0ff96f1a0e7f 100644 --- a/Makefile +++ b/Makefile @@ -886,7 +886,7 @@ LD_FLAGS_LTO_CLANG := -mllvm -import-instr-limit=5 KBUILD_LDFLAGS += $(LD_FLAGS_LTO_CLANG) KBUILD_LDFLAGS_MODULE += $(LD_FLAGS_LTO_CLANG) -KBUILD_LDS_MODULE += $(srctree)/scripts/module-lto.lds +KBUILD_LDS_MODULE += scripts/module-lto.lds endif ifdef CONFIG_LTO diff --git a/scripts/Makefile b/scripts/Makefile index 5e75802b1a44..f07e0ef09233 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -35,6 +35,8 @@ hostprogs := $(always-y) $(always-m) # The following programs are only built on demand hostprogs += unifdef +extra-$(CONFIG_LTO_CLANG) += module-lto.lds + subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins subdir-$(CONFIG_MODVERSIONS) += genksyms subdir-$(CONFIG_SECURITY_SELINUX) += selinux diff --git a/scripts/module-lto.lds b/scripts/module-lto.lds.S similarity index 68% rename from scripts/module-lto.lds rename to scripts/module-lto.lds.S index 5ba0e9461e13..c0f4fdeb84a0 100644 --- a/scripts/module-lto.lds +++ b/scripts/module-lto.lds.S @@ -1,3 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include + /* * With CONFIG_LTO_CLANG, LLD always enables -fdata-sections and * -ffunction-sections, which increases the size of the final module. @@ -18,5 +21,14 @@ SECTIONS { .rela.rodata : { *(.rela.rodata .rela.rodata.[0-9a-zA-Z_]*) } .rela.text : { *(.rela.text .rela.text.[0-9a-zA-Z_]*) } .rodata : { *(.rodata .rodata.[0-9a-zA-Z_]*) } - .text : { *(.text .text.[0-9a-zA-Z_]*) } + + /* + * With CFI_CLANG, ensure __cfi_check is at the beginning of the + * .text section, and that the section is aligned to page size. + */ + .text : ALIGN(PAGE_SIZE) { + *(.text.__cfi_check) + *(.text .text.[0-9a-zA-Z_]* .text..L.cfi*) + } + }