linux/arch/s390/boot/vmlinux.lds.S

/* SPDX-License-Identifier: GPL-2.0 */
#include <asm-generic/vmlinux.lds.h>
#include <asm/vmlinux.lds.h>
#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm/sclp.h>
#include "boot.h"

OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
OUTPUT_ARCH(s390:64-bit)

ENTRY(startup)

SECTIONS
{
	. = 0;
	.ipldata : {
		*(.ipldata)
	}
	. = IPL_START;
	.head.text : {
		_head = . ;
		HEAD_TEXT
		_ehead = . ;
	}
	. = PARMAREA;
	.parmarea : {
		*(.parmarea)
	}
	.text :	{
		_text = .;	/* Text */
		*(.text)
		*(.text.*)
		INIT_TEXT
		_etext = . ;
	}
	.rodata : {
		_rodata = . ;
		*(.rodata)	 /* read-only data */
		*(.rodata.*)
		_erodata = . ;
	}
	.got : {
		*(.got)
	}
	NOTES
	.data :	{
		_data = . ;
		*(.data)
		*(.data.*)
		_edata = . ;
	}

	BOOT_DATA
	BOOT_DATA_PRESERVED

	/*
	 * This is the BSS section of the decompressor and not of the decompressed Linux kernel.
	 * It will consume place in the decompressor's image.
	 */
	. = ALIGN(8);
	.bss : {
		_bss = . ;
		*(.bss)
		*(.bss.*)
		*(COMMON)
		/*
		 * Stacks for the decompressor
		 */
		. = ALIGN(PAGE_SIZE);
		_dump_info_stack_start = .;
		. += PAGE_SIZE;
		_dump_info_stack_end = .;
		. = ALIGN(PAGE_SIZE);
		_stack_start = .;
		. += BOOT_STACK_SIZE;
		_stack_end = .;
		_ebss = .;
	}

	/*
	 * uncompressed image info used by the decompressor it should match
	 * struct vmlinux_info. It comes from .vmlinux.info section of
	 * uncompressed vmlinux in a form of info.o
	 */
	. = ALIGN(8);
	.vmlinux.info : {
		_vmlinux_info = .;
		*(.vmlinux.info)
	}

	.decompressor.syms : {
		. += 1; /* make sure we have \0 before the first entry */
		. = ALIGN(2);
		_decompressor_syms_start = .;
		*(.decompressor.syms)
		_decompressor_syms_end = .;
	}

	_decompressor_end = .;

#ifdef CONFIG_KERNEL_UNCOMPRESSED
	. = 0x100000;
#else
	. = ALIGN(8);
#endif
	.rodata.compressed : {
		_compressed_start = .;
		*(.vmlinux.bin.compressed)
		_compressed_end = .;
	}

#ifndef CONFIG_PIE_BUILD
	/*
	 * When the kernel is built with CONFIG_KERNEL_UNCOMPRESSED, the entire
	 * uncompressed vmlinux.bin is positioned in the bzImage decompressor
	 * image at the default kernel LMA of 0x100000, enabling it to be
	 * executed in-place. However, the size of .vmlinux.relocs could be
	 * large enough to cause an overlap with the uncompressed kernel at the
	 * address 0x100000. To address this issue, .vmlinux.relocs is
	 * positioned after the .rodata.compressed.
	 */
	. = ALIGN(4);
	.vmlinux.relocs : {
		__vmlinux_relocs_64_start = .;
		*(.vmlinux.relocs_64)
		__vmlinux_relocs_64_end = .;
	}
#endif

#define SB_TRAILER_SIZE 32
	/* Trailer needed for Secure Boot */
	. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
	. = ALIGN(4096) - SB_TRAILER_SIZE;
	.sb.trailer : {
		QUAD(0)
		QUAD(0)
		QUAD(0)
		QUAD(0x000000207a49504c)
	}
	_end = .;

	DWARF_DEBUG
	ELF_DETAILS

	/*
	 * Make sure that the .got.plt is either completely empty or it
	 * contains only the three reserved double words.
	 */
	.got.plt : {
		*(.got.plt)
	}
	ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")

	/*
	 * Sections that should stay zero sized, which is safer to
	 * explicitly check instead of blindly discarding.
	 */
	.plt : {
		*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
	}
	ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
	.rela.dyn : {
		*(.rela.*) *(.rela_*)
	}
	ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")

	/* Sections to be discarded */
	/DISCARD/ : {
		COMMON_DISCARDS
		*(.eh_frame)
		*(__ex_table)
		*(*__ksymtab*)
		*(___kcrctab*)
	}
}