/* SPDX-License-Identifier: GPL-2.0 */
/* ld script to make s390 Linux kernel
 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
 */

#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm/ftrace.lds.h>

/*
 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
 * make sure it has 16k alignment.
 */
#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
                           *(.bss..invalid_pg_dir)

#define RO_EXCEPTION_TABLE_ALIGN        16

/* Handle ro_after_init data on our own. */
#define RO_AFTER_INIT_DATA

#define RUNTIME_DISCARD_EXIT

#define EMITS_PT_NOTE

#include <asm-generic/vmlinux.lds.h>
#include <asm/vmlinux.lds.h>

OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
OUTPUT_ARCH(s390:64-bit)
ENTRY(startup_continue)
jiffies = jiffies_64;

PHDRS {
        text PT_LOAD FLAGS(5);  /* R_E */
        data PT_LOAD FLAGS(7);  /* RWE */
        note PT_NOTE FLAGS(0);  /* ___ */
}

SECTIONS
{
        . = TEXT_OFFSET;
        .text : {
                _stext = .;             /* Start of text section */
                _text = .;              /* Text and read-only data */
                HEAD_TEXT
                TEXT_TEXT
                SCHED_TEXT
                LOCK_TEXT
                KPROBES_TEXT
                IRQENTRY_TEXT
                SOFTIRQENTRY_TEXT
                FTRACE_HOTPATCH_TRAMPOLINES_TEXT
                *(.text..*_indirect_*)
                *(.gnu.warning)
                . = ALIGN(PAGE_SIZE);
                _etext = .;             /* End of text section */
        } :text = 0x0700

        RO_DATA(PAGE_SIZE)

        . = ALIGN(PAGE_SIZE);
        _sdata = .;             /* Start of data section */

        . = ALIGN(PAGE_SIZE);
        __start_ro_after_init = .;
        .data..ro_after_init : {
                 *(.data..ro_after_init)
                JUMP_TABLE_DATA
        } :data
        . = ALIGN(PAGE_SIZE);
        __end_ro_after_init = .;

        . = ALIGN(8);
        .skey_region_table : {
                __skey_region_start = .;
                KEEP(*(.skey_region))
                __skey_region_end = .;
        }

        .data.rel.ro : {
                *(.data.rel.ro .data.rel.ro.*)
        }
        .got : {
                __got_start = .;
                *(.got)
                __got_end = .;
        }

        RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
        .data.rel : {
                *(.data.rel*)
        }
        BOOT_DATA_PRESERVED

        . = ALIGN(8);
        .amode31.refs : {
                _start_amode31_refs = .;
                *(.amode31.refs)
                _end_amode31_refs = .;
        }

        . = ALIGN(PAGE_SIZE);
        _edata = .;             /* End of data section */

        /* will be freed after init */
        . = ALIGN(PAGE_SIZE);   /* Init code and data */
        __init_begin = .;

        . = ALIGN(PAGE_SIZE);
        .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
                _sinittext = .;
                INIT_TEXT
                . = ALIGN(PAGE_SIZE);
                _einittext = .;
        }

        /*
         * .exit.text is discarded at runtime, not link time,
         * to deal with references from __bug_table
        */
        .exit.text : {
                EXIT_TEXT
        }

        .exit.data : {
                EXIT_DATA
        }

        /*
         * struct alt_inst entries. From the header (alternative.h):
         * "Alternative instructions for different CPU types or capabilities"
         * Think locking instructions on spinlocks.
         * Note, that it is a part of __init region.
         */
        . = ALIGN(8);
        .altinstructions : {
                __alt_instructions = .;
                *(.altinstructions)
                __alt_instructions_end = .;
        }

        /*
         * And here are the replacement instructions. The linker sticks
         * them as binary blobs. The .altinstructions has enough data to
         * get the address and the length of them to patch the kernel safely.
         * Note, that it is a part of __init region.
         */
        .altinstr_replacement : {
                *(.altinstr_replacement)
        }

#ifdef CONFIG_STACKPROTECTOR
        . = ALIGN(8);
        .stack_prot_table : {
                __stack_prot_start = .;
                KEEP(*(__stack_protector_loc))
                __stack_prot_end = .;
        }
#endif

        /*
         * Table with the patch locations to undo expolines
        */
        . = ALIGN(4);
        .nospec_call_table : {
                __nospec_call_start = . ;
                *(.s390_indirect*)
                __nospec_call_end = . ;
        }
        .nospec_return_table : {
                __nospec_return_start = . ;
                *(.s390_return*)
                __nospec_return_end = . ;
        }

        BOOT_DATA

        /*
         * .amode31 section for code, data, ex_table that need to stay
         * below 2 GB, even when the kernel is relocated above 2 GB.
         */
        . = ALIGN(PAGE_SIZE);
        _samode31 = .;
        .amode31.text : {
                _stext_amode31 = .;
                *(.amode31.text)
                *(.amode31.text.*_indirect_*)
                . = ALIGN(PAGE_SIZE);
                _etext_amode31 = .;
        }
        . = ALIGN(16);
        .amode31.ex_table : {
                _start_amode31_ex_table = .;
                KEEP(*(.amode31.ex_table))
                _stop_amode31_ex_table = .;
        }
        . = ALIGN(PAGE_SIZE);
        .amode31.data : {
                *(.amode31.data)
        }
        . = _samode31 + AMODE31_SIZE;
        _eamode31 = .;

        /* early.c uses stsi, which requires page aligned data. */
        . = ALIGN(PAGE_SIZE);
        INIT_DATA_SECTION(0x100)

        RUNTIME_CONST_VARIABLES

        PERCPU_SECTION(0x100)

        . = ALIGN(PAGE_SIZE);
        __init_end = .;         /* freed after init ends here */

        BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)

        . = ALIGN(PAGE_SIZE);
        _end = . ;

        /* Debugging sections.  */
        STABS_DEBUG
        DWARF_DEBUG
        MODINFO
        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!")

        /*
         * uncompressed image info used by the decompressor
         * it should match struct vmlinux_info
         */
        .vmlinux.info 0 (INFO) : {
                QUAD(startup_continue)                          /* entry */
                QUAD(__bss_start - _stext)                      /* image_size */
                QUAD(__bss_stop - __bss_start)                  /* bss_size */
                QUAD(__boot_data_start)                         /* bootdata_off */
                QUAD(__boot_data_end - __boot_data_start)       /* bootdata_size */
                QUAD(__boot_data_preserved_start)               /* bootdata_preserved_off */
                QUAD(__boot_data_preserved_end -
                     __boot_data_preserved_start)               /* bootdata_preserved_size */
                QUAD(__got_start)                               /* got_start */
                QUAD(__got_end)                                 /* got_end */
                QUAD(_eamode31 - _samode31)                     /* amode31_size */
                QUAD(init_mm)
                QUAD(swapper_pg_dir)
                QUAD(invalid_pg_dir)
                QUAD(__alt_instructions)
                QUAD(__alt_instructions_end)
#ifdef CONFIG_STACKPROTECTOR
                QUAD(__stack_prot_start)
                QUAD(__stack_prot_end)
#endif
#ifdef CONFIG_KASAN
                QUAD(kasan_early_shadow_page)
                QUAD(kasan_early_shadow_pte)
                QUAD(kasan_early_shadow_pmd)
                QUAD(kasan_early_shadow_pud)
                QUAD(kasan_early_shadow_p4d)
#endif
        } :NONE

        /* Sections to be discarded */
        DISCARDS
        /DISCARD/ : {
                *(.eh_frame)
                *(.interp)
        }
}