/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Linker script for vsyscall DSO.  The vsyscall page is an ELF shared
 * object prelinked to its virtual address, and with only one read-only
 * segment (that fits in one page).  This script controls its layout.
 */
#include <asm/asm-offsets.h>

#ifdef CONFIG_CPU_LITTLE_ENDIAN
OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux")
#else
OUTPUT_FORMAT("elf32-shbig-linux", "elf32-shbig-linux", "elf32-shbig-linux")
#endif
OUTPUT_ARCH(sh)

/* The ELF entry point can be used to set the AT_SYSINFO value.  */
ENTRY(__kernel_vsyscall);

SECTIONS
{
        . = SIZEOF_HEADERS;

        .hash           : { *(.hash) }                  :text
        .gnu.hash       : { *(.gnu.hash) }
        .dynsym         : { *(.dynsym) }
        .dynstr         : { *(.dynstr) }
        .gnu.version    : { *(.gnu.version) }
        .gnu.version_d  : { *(.gnu.version_d) }
        .gnu.version_r  : { *(.gnu.version_r) }

        /*
         * This linker script is used both with -r and with -shared.
         * For the layouts to match, we need to skip more than enough
         * space for the dynamic symbol table et al.  If this amount
         * is insufficient, ld -shared will barf.  Just increase it here.
         */
        . = 0x400;

        .text           : { *(.text) }                  :text   =0x90909090
        .note           : { *(.note.*) }                :text   :note
        .eh_frame_hdr   : { *(.eh_frame_hdr ) }         :text   :eh_frame_hdr
        .eh_frame       : {
                KEEP (*(.eh_frame))
                LONG (0)
        }                                               :text
        .dynamic        : { *(.dynamic) }               :text   :dynamic
        .useless        : {
              *(.got.plt) *(.got)
              *(.data .data.* .gnu.linkonce.d.*)
              *(.dynbss)
              *(.bss .bss.* .gnu.linkonce.b.*)
        }                                               :text
}

/*
 * Very old versions of ld do not recognize this name token; use the constant.
 */
#define PT_GNU_EH_FRAME 0x6474e550

/*
 * We must supply the ELF program headers explicitly to get just one
 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 */
PHDRS
{
        text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
        dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
        note            PT_NOTE FLAGS(4);               /* PF_R */
        eh_frame_hdr    PT_GNU_EH_FRAME;
}

/*
 * This controls what symbols we export from the DSO.
 */
VERSION
{
        LINUX_2.6 {
        global:
                __kernel_vsyscall;
                __kernel_sigreturn;
                __kernel_rt_sigreturn;

        local: *;
        };
}