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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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00cda11d3b
When the kernel is built with CONFIG_PIE_BUILD option enabled it uses dynamic symbols, for which the linker does not allow more than 64K number of entries. This can break features like kpatch. Hence, whenever possible the kernel is built with CONFIG_PIE_BUILD option disabled. For that support of unaligned symbols generated by linker scripts in the compiler is necessary. However, older compilers might lack such support. In that case the build process resorts to CONFIG_PIE_BUILD option-enabled build. Compile object files with -fPIC option and then link the kernel binary with -no-pie linker option. As result, the dynamic symbols are not generated and not only kpatch feature succeeds, but also the whole CONFIG_PIE_BUILD option-enabled code could be dropped. [ agordeev: Reworded the commit message ] Suggested-by: Ulrich Weigand <ulrich.weigand@de.ibm.com> Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
167 lines
3.1 KiB
ArmAsm
167 lines
3.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/page.h>
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#include <asm/sclp.h>
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#include "boot.h"
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OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
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OUTPUT_ARCH(s390:64-bit)
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ENTRY(startup)
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SECTIONS
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{
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. = 0;
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.ipldata : {
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*(.ipldata)
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}
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. = IPL_START;
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.head.text : {
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_head = . ;
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HEAD_TEXT
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_ehead = . ;
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}
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. = PARMAREA;
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.parmarea : {
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*(.parmarea)
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}
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.text : {
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_text = .; /* Text */
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*(.text)
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*(.text.*)
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INIT_TEXT
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_etext = . ;
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}
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.rodata : {
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_rodata = . ;
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*(.rodata) /* read-only data */
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*(.rodata.*)
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_erodata = . ;
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}
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.got : {
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*(.got)
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}
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NOTES
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.data : {
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_data = . ;
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*(.data)
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*(.data.*)
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_edata = . ;
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}
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BOOT_DATA
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BOOT_DATA_PRESERVED
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/*
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* This is the BSS section of the decompressor and not of the decompressed Linux kernel.
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* It will consume place in the decompressor's image.
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*/
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. = ALIGN(8);
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.bss : {
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_bss = . ;
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*(.bss)
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*(.bss.*)
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*(COMMON)
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/*
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* Stacks for the decompressor
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*/
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. = ALIGN(PAGE_SIZE);
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_dump_info_stack_start = .;
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. += PAGE_SIZE;
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_dump_info_stack_end = .;
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. = ALIGN(PAGE_SIZE);
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_stack_start = .;
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. += BOOT_STACK_SIZE;
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_stack_end = .;
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_ebss = .;
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}
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/*
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* uncompressed image info used by the decompressor it should match
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* struct vmlinux_info. It comes from .vmlinux.info section of
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* uncompressed vmlinux in a form of info.o
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*/
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. = ALIGN(8);
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.vmlinux.info : {
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_vmlinux_info = .;
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*(.vmlinux.info)
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}
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.decompressor.syms : {
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. += 1; /* make sure we have \0 before the first entry */
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. = ALIGN(2);
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_decompressor_syms_start = .;
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*(.decompressor.syms)
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_decompressor_syms_end = .;
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}
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_decompressor_end = .;
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. = ALIGN(4);
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.vmlinux.relocs : {
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__vmlinux_relocs_64_start = .;
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*(.vmlinux.relocs_64)
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__vmlinux_relocs_64_end = .;
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}
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#ifdef CONFIG_KERNEL_UNCOMPRESSED
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. = ALIGN(PAGE_SIZE);
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. += AMODE31_SIZE; /* .amode31 section */
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#else
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. = ALIGN(8);
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#endif
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.rodata.compressed : {
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_compressed_start = .;
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*(.vmlinux.bin.compressed)
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_compressed_end = .;
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}
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#define SB_TRAILER_SIZE 32
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/* Trailer needed for Secure Boot */
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. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
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. = ALIGN(4096) - SB_TRAILER_SIZE;
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.sb.trailer : {
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QUAD(0)
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QUAD(0)
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QUAD(0)
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QUAD(0x000000207a49504c)
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}
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_end = .;
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DWARF_DEBUG
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ELF_DETAILS
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/*
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* Make sure that the .got.plt is either completely empty or it
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* contains only the three reserved double words.
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*/
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.got.plt : {
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*(.got.plt)
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}
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ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
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/*
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* Sections that should stay zero sized, which is safer to
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* explicitly check instead of blindly discarding.
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*/
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.plt : {
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*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
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}
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ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
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.rela.dyn : {
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*(.rela.*) *(.rela_*)
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}
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ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
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/* Sections to be discarded */
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/DISCARD/ : {
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COMMON_DISCARDS
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*(.eh_frame)
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*(__ex_table)
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*(*__ksymtab*)
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*(___kcrctab*)
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}
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}
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