linux/arch/mips/kernel/vmlinux.lds.S
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#include <asm/asm-offsets.h>
   3#include <asm/thread_info.h>
   4
   5#define PAGE_SIZE _PAGE_SIZE
   6
   7/*
   8 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
   9 * ensure that it has .bss alignment (64K).
  10 */
  11#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
  12
  13#include <asm-generic/vmlinux.lds.h>
  14
  15#undef mips
  16#define mips mips
  17OUTPUT_ARCH(mips)
  18ENTRY(kernel_entry)
  19PHDRS {
  20        text PT_LOAD FLAGS(7);  /* RWX */
  21#ifndef CONFIG_CAVIUM_OCTEON_SOC
  22        note PT_NOTE FLAGS(4);  /* R__ */
  23#endif /* CAVIUM_OCTEON_SOC */
  24}
  25
  26#ifdef CONFIG_32BIT
  27        #ifdef CONFIG_CPU_LITTLE_ENDIAN
  28                jiffies  = jiffies_64;
  29        #else
  30                jiffies  = jiffies_64 + 4;
  31        #endif
  32#else
  33        jiffies  = jiffies_64;
  34#endif
  35
  36SECTIONS
  37{
  38#ifdef CONFIG_BOOT_ELF64
  39        /* Read-only sections, merged into text segment: */
  40        /* . = 0xc000000000000000; */
  41
  42        /* This is the value for an Origin kernel, taken from an IRIX kernel.  */
  43        /* . = 0xc00000000001c000; */
  44
  45        /* Set the vaddr for the text segment to a value
  46         *   >= 0xa800 0000 0001 9000 if no symmon is going to configured
  47         *   >= 0xa800 0000 0030 0000 otherwise
  48         */
  49
  50        /* . = 0xa800000000300000; */
  51        . = 0xffffffff80300000;
  52#endif
  53        . = VMLINUX_LOAD_ADDRESS;
  54        /* read-only */
  55        _text = .;      /* Text and read-only data */
  56        .text : {
  57                TEXT_TEXT
  58                SCHED_TEXT
  59                CPUIDLE_TEXT
  60                LOCK_TEXT
  61                KPROBES_TEXT
  62                IRQENTRY_TEXT
  63                SOFTIRQENTRY_TEXT
  64                *(.text.*)
  65                *(.fixup)
  66                *(.gnu.warning)
  67        } :text = 0
  68        _etext = .;     /* End of text section */
  69
  70        EXCEPTION_TABLE(16)
  71
  72        /* Exception table for data bus errors */
  73        __dbe_table : {
  74                __start___dbe_table = .;
  75                *(__dbe_table)
  76                __stop___dbe_table = .;
  77        }
  78
  79#ifdef CONFIG_CAVIUM_OCTEON_SOC
  80#define NOTES_HEADER
  81#else /* CONFIG_CAVIUM_OCTEON_SOC */
  82#define NOTES_HEADER :note
  83#endif /* CONFIG_CAVIUM_OCTEON_SOC */
  84        NOTES :text NOTES_HEADER
  85        .dummy : { *(.dummy) } :text
  86
  87        _sdata = .;                     /* Start of data section */
  88        RODATA
  89
  90        /* writeable */
  91        .data : {       /* Data */
  92                . = . + DATAOFFSET;             /* for CONFIG_MAPPED_KERNEL */
  93
  94                INIT_TASK_DATA(THREAD_SIZE)
  95                NOSAVE_DATA
  96                CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
  97                READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
  98                DATA_DATA
  99                CONSTRUCTORS
 100        }
 101        BUG_TABLE
 102        _gp = . + 0x8000;
 103        .lit8 : {
 104                *(.lit8)
 105        }
 106        .lit4 : {
 107                *(.lit4)
 108        }
 109        /* We want the small data sections together, so single-instruction offsets
 110           can access them all, and initialized data all before uninitialized, so
 111           we can shorten the on-disk segment size.  */
 112        .sdata : {
 113                *(.sdata)
 114        }
 115        _edata =  .;                    /* End of data section */
 116
 117        /* will be freed after init */
 118        . = ALIGN(PAGE_SIZE);           /* Init code and data */
 119        __init_begin = .;
 120        INIT_TEXT_SECTION(PAGE_SIZE)
 121        INIT_DATA_SECTION(16)
 122
 123        . = ALIGN(4);
 124        .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
 125                __mips_machines_start = .;
 126                *(.mips.machines.init)
 127                __mips_machines_end = .;
 128        }
 129
 130        /* .exit.text is discarded at runtime, not link time, to deal with
 131         * references from .rodata
 132         */
 133        .exit.text : {
 134                EXIT_TEXT
 135        }
 136        .exit.data : {
 137                EXIT_DATA
 138        }
 139#ifdef CONFIG_SMP
 140        PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
 141#endif
 142
 143#ifdef CONFIG_RELOCATABLE
 144        . = ALIGN(4);
 145
 146        .data.reloc : {
 147                _relocation_start = .;
 148                /*
 149                 * Space for relocation table
 150                 * This needs to be filled so that the
 151                 * relocs tool can overwrite the content.
 152                 * An invalid value is left at the start of the
 153                 * section to abort relocation if the table
 154                 * has not been filled in.
 155                 */
 156                LONG(0xFFFFFFFF);
 157                FILL(0);
 158                . += CONFIG_RELOCATION_TABLE_SIZE - 4;
 159                _relocation_end = .;
 160        }
 161#endif
 162
 163#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
 164        __appended_dtb = .;
 165        /* leave space for appended DTB */
 166        . += 0x100000;
 167#elif defined(CONFIG_MIPS_ELF_APPENDED_DTB)
 168        .appended_dtb : AT(ADDR(.appended_dtb) - LOAD_OFFSET) {
 169                *(.appended_dtb)
 170                KEEP(*(.appended_dtb))
 171        }
 172#endif
 173        /*
 174         * Align to 64K in attempt to eliminate holes before the
 175         * .bss..swapper_pg_dir section at the start of .bss.  This
 176         * also satisfies PAGE_SIZE alignment as the largest page size
 177         * allowed is 64K.
 178         */
 179        . = ALIGN(0x10000);
 180        __init_end = .;
 181        /* freed after init ends here */
 182
 183        /*
 184         * Force .bss to 64K alignment so that .bss..swapper_pg_dir
 185         * gets that alignment.  .sbss should be empty, so there will be
 186         * no holes after __init_end. */
 187        BSS_SECTION(0, 0x10000, 8)
 188
 189        _end = . ;
 190
 191        /* These mark the ABI of the kernel for debuggers.  */
 192        .mdebug.abi32 : {
 193                KEEP(*(.mdebug.abi32))
 194        }
 195        .mdebug.abi64 : {
 196                KEEP(*(.mdebug.abi64))
 197        }
 198
 199        /* This is the MIPS specific mdebug section.  */
 200        .mdebug : {
 201                *(.mdebug)
 202        }
 203
 204        STABS_DEBUG
 205        DWARF_DEBUG
 206
 207        /* These must appear regardless of  .  */
 208        .gptab.sdata : {
 209                *(.gptab.data)
 210                *(.gptab.sdata)
 211        }
 212        .gptab.sbss : {
 213                *(.gptab.bss)
 214                *(.gptab.sbss)
 215        }
 216
 217        /* Sections to be discarded */
 218        DISCARDS
 219        /DISCARD/ : {
 220                /* ABI crap starts here */
 221                *(.MIPS.abiflags)
 222                *(.MIPS.options)
 223                *(.options)
 224                *(.pdr)
 225                *(.reginfo)
 226                *(.eh_frame)
 227        }
 228}
 229