1ef53dae8SSam Ravnborg /* 2ef53dae8SSam Ravnborg * Helper macros to support writing architecture specific 3ef53dae8SSam Ravnborg * linker scripts. 4ef53dae8SSam Ravnborg * 5ef53dae8SSam Ravnborg * A minimal linker scripts has following content: 6ef53dae8SSam Ravnborg * [This is a sample, architectures may have special requiriements] 7ef53dae8SSam Ravnborg * 8ef53dae8SSam Ravnborg * OUTPUT_FORMAT(...) 9ef53dae8SSam Ravnborg * OUTPUT_ARCH(...) 10ef53dae8SSam Ravnborg * ENTRY(...) 11ef53dae8SSam Ravnborg * SECTIONS 12ef53dae8SSam Ravnborg * { 13ef53dae8SSam Ravnborg * . = START; 14ef53dae8SSam Ravnborg * __init_begin = .; 157923f90fSSam Ravnborg * HEAD_TEXT_SECTION 16ef53dae8SSam Ravnborg * INIT_TEXT_SECTION(PAGE_SIZE) 17ef53dae8SSam Ravnborg * INIT_DATA_SECTION(...) 180415b00dSTejun Heo * PERCPU_SECTION(CACHELINE_SIZE) 19ef53dae8SSam Ravnborg * __init_end = .; 20ef53dae8SSam Ravnborg * 21ef53dae8SSam Ravnborg * _stext = .; 22ef53dae8SSam Ravnborg * TEXT_SECTION = 0 23ef53dae8SSam Ravnborg * _etext = .; 24ef53dae8SSam Ravnborg * 25ef53dae8SSam Ravnborg * _sdata = .; 26ef53dae8SSam Ravnborg * RO_DATA_SECTION(PAGE_SIZE) 27ef53dae8SSam Ravnborg * RW_DATA_SECTION(...) 28ef53dae8SSam Ravnborg * _edata = .; 29ef53dae8SSam Ravnborg * 30ef53dae8SSam Ravnborg * EXCEPTION_TABLE(...) 31ef53dae8SSam Ravnborg * NOTES 32ef53dae8SSam Ravnborg * 3304e448d9STim Abbott * BSS_SECTION(0, 0, 0) 34ef53dae8SSam Ravnborg * _end = .; 35ef53dae8SSam Ravnborg * 36ef53dae8SSam Ravnborg * STABS_DEBUG 37ef53dae8SSam Ravnborg * DWARF_DEBUG 38023bf6f1STejun Heo * 39023bf6f1STejun Heo * DISCARDS // must be the last 40ef53dae8SSam Ravnborg * } 41ef53dae8SSam Ravnborg * 42ef53dae8SSam Ravnborg * [__init_begin, __init_end] is the init section that may be freed after init 43ef53dae8SSam Ravnborg * [_stext, _etext] is the text section 44ef53dae8SSam Ravnborg * [_sdata, _edata] is the data section 45ef53dae8SSam Ravnborg * 46ef53dae8SSam Ravnborg * Some of the included output section have their own set of constants. 47ef53dae8SSam Ravnborg * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 48ef53dae8SSam Ravnborg * [__nosave_begin, __nosave_end] for the nosave data 49ef53dae8SSam Ravnborg */ 50c80d471aSTim Abbott 511da177e4SLinus Torvalds #ifndef LOAD_OFFSET 521da177e4SLinus Torvalds #define LOAD_OFFSET 0 531da177e4SLinus Torvalds #endif 541da177e4SLinus Torvalds 55b92021b0SRusty Russell #include <linux/export.h> 561da177e4SLinus Torvalds 576d30e3a8SSam Ravnborg /* Align . to a 8 byte boundary equals to maximum function alignment. */ 586d30e3a8SSam Ravnborg #define ALIGN_FUNCTION() . = ALIGN(8) 596d30e3a8SSam Ravnborg 6007fca0e5SSam Ravnborg /* 6107fca0e5SSam Ravnborg * Align to a 32 byte boundary equal to the 6207fca0e5SSam Ravnborg * alignment gcc 4.5 uses for a struct 6307fca0e5SSam Ravnborg */ 64aab94339SDirk Brandewie #define STRUCT_ALIGNMENT 32 65aab94339SDirk Brandewie #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 6607fca0e5SSam Ravnborg 67eb8f6890SSam Ravnborg /* The actual configuration determine if the init/exit sections 68eb8f6890SSam Ravnborg * are handled as text/data or they can be discarded (which 69eb8f6890SSam Ravnborg * often happens at runtime) 70eb8f6890SSam Ravnborg */ 71eb8f6890SSam Ravnborg #ifdef CONFIG_HOTPLUG_CPU 72eb8f6890SSam Ravnborg #define CPU_KEEP(sec) *(.cpu##sec) 73eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) 74eb8f6890SSam Ravnborg #else 75eb8f6890SSam Ravnborg #define CPU_KEEP(sec) 76eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) *(.cpu##sec) 77eb8f6890SSam Ravnborg #endif 78eb8f6890SSam Ravnborg 791a3fb6d4SAdrian Bunk #if defined(CONFIG_MEMORY_HOTPLUG) 80eb8f6890SSam Ravnborg #define MEM_KEEP(sec) *(.mem##sec) 81eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) 82eb8f6890SSam Ravnborg #else 83eb8f6890SSam Ravnborg #define MEM_KEEP(sec) 84eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) *(.mem##sec) 85eb8f6890SSam Ravnborg #endif 86eb8f6890SSam Ravnborg 878da3821bSSteven Rostedt #ifdef CONFIG_FTRACE_MCOUNT_RECORD 884b3b4c5eSJohn Reiser #define MCOUNT_REC() . = ALIGN(8); \ 894b3b4c5eSJohn Reiser VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 908da3821bSSteven Rostedt *(__mcount_loc) \ 918da3821bSSteven Rostedt VMLINUX_SYMBOL(__stop_mcount_loc) = .; 928da3821bSSteven Rostedt #else 938da3821bSSteven Rostedt #define MCOUNT_REC() 948da3821bSSteven Rostedt #endif 95eb8f6890SSam Ravnborg 962ed84eebSSteven Rostedt #ifdef CONFIG_TRACE_BRANCH_PROFILING 9745b79749SSteven Rostedt #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 9845b79749SSteven Rostedt *(_ftrace_annotated_branch) \ 9945b79749SSteven Rostedt VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 1001f0d69a9SSteven Rostedt #else 1011f0d69a9SSteven Rostedt #define LIKELY_PROFILE() 1021f0d69a9SSteven Rostedt #endif 1031f0d69a9SSteven Rostedt 1042bcd521aSSteven Rostedt #ifdef CONFIG_PROFILE_ALL_BRANCHES 1052bcd521aSSteven Rostedt #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 1062bcd521aSSteven Rostedt *(_ftrace_branch) \ 1072bcd521aSSteven Rostedt VMLINUX_SYMBOL(__stop_branch_profile) = .; 1082bcd521aSSteven Rostedt #else 1092bcd521aSSteven Rostedt #define BRANCH_PROFILE() 1102bcd521aSSteven Rostedt #endif 1112bcd521aSSteven Rostedt 1125f77a88bSTom Zanussi #ifdef CONFIG_EVENT_TRACING 113e4a9ea5eSSteven Rostedt #define FTRACE_EVENTS() . = ALIGN(8); \ 114e4a9ea5eSSteven Rostedt VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 115b77e38aaSSteven Rostedt *(_ftrace_events) \ 116b77e38aaSSteven Rostedt VMLINUX_SYMBOL(__stop_ftrace_events) = .; 117b77e38aaSSteven Rostedt #else 118b77e38aaSSteven Rostedt #define FTRACE_EVENTS() 119b77e38aaSSteven Rostedt #endif 120b77e38aaSSteven Rostedt 1211ba28e02SLai Jiangshan #ifdef CONFIG_TRACING 1221ba28e02SLai Jiangshan #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 1231ba28e02SLai Jiangshan *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 1241ba28e02SLai Jiangshan VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 125102c9323SSteven Rostedt (Red Hat) #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ 126102c9323SSteven Rostedt (Red Hat) *(__tracepoint_str) /* Trace_printk fmt' pointer */ \ 127102c9323SSteven Rostedt (Red Hat) VMLINUX_SYMBOL(__stop___tracepoint_str) = .; 1281ba28e02SLai Jiangshan #else 1291ba28e02SLai Jiangshan #define TRACE_PRINTKS() 130102c9323SSteven Rostedt (Red Hat) #define TRACEPOINT_STR() 1311ba28e02SLai Jiangshan #endif 1321ba28e02SLai Jiangshan 133bed1ffcaSFrederic Weisbecker #ifdef CONFIG_FTRACE_SYSCALLS 1343d56e331SSteven Rostedt #define TRACE_SYSCALLS() . = ALIGN(8); \ 1353d56e331SSteven Rostedt VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 136bed1ffcaSFrederic Weisbecker *(__syscalls_metadata) \ 137bed1ffcaSFrederic Weisbecker VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 138bed1ffcaSFrederic Weisbecker #else 139bed1ffcaSFrederic Weisbecker #define TRACE_SYSCALLS() 140bed1ffcaSFrederic Weisbecker #endif 141bed1ffcaSFrederic Weisbecker 142ae278a93SStephen Warren #ifdef CONFIG_CLKSRC_OF 143ae278a93SStephen Warren #define CLKSRC_OF_TABLES() . = ALIGN(8); \ 144ae278a93SStephen Warren VMLINUX_SYMBOL(__clksrc_of_table) = .; \ 145ae278a93SStephen Warren *(__clksrc_of_table) \ 146ae278a93SStephen Warren *(__clksrc_of_table_end) 147ae278a93SStephen Warren #else 148ae278a93SStephen Warren #define CLKSRC_OF_TABLES() 149ae278a93SStephen Warren #endif 150aab94339SDirk Brandewie 151f6e916b8SThomas Petazzoni #ifdef CONFIG_IRQCHIP 152f6e916b8SThomas Petazzoni #define IRQCHIP_OF_MATCH_TABLE() \ 153f6e916b8SThomas Petazzoni . = ALIGN(8); \ 154f6e916b8SThomas Petazzoni VMLINUX_SYMBOL(__irqchip_begin) = .; \ 155f6e916b8SThomas Petazzoni *(__irqchip_of_table) \ 156f6e916b8SThomas Petazzoni *(__irqchip_of_end) 157f6e916b8SThomas Petazzoni #else 158f6e916b8SThomas Petazzoni #define IRQCHIP_OF_MATCH_TABLE() 159f6e916b8SThomas Petazzoni #endif 160aab94339SDirk Brandewie 161f2f6c255SPrashant Gaikwad #ifdef CONFIG_COMMON_CLK 162f2f6c255SPrashant Gaikwad #define CLK_OF_TABLES() . = ALIGN(8); \ 163f2f6c255SPrashant Gaikwad VMLINUX_SYMBOL(__clk_of_table) = .; \ 164f2f6c255SPrashant Gaikwad *(__clk_of_table) \ 165f2f6c255SPrashant Gaikwad *(__clk_of_table_end) 166f2f6c255SPrashant Gaikwad #else 167f2f6c255SPrashant Gaikwad #define CLK_OF_TABLES() 168f2f6c255SPrashant Gaikwad #endif 169f2f6c255SPrashant Gaikwad 170aab94339SDirk Brandewie #define KERNEL_DTB() \ 171aab94339SDirk Brandewie STRUCT_ALIGN(); \ 172aab94339SDirk Brandewie VMLINUX_SYMBOL(__dtb_start) = .; \ 173aab94339SDirk Brandewie *(.dtb.init.rodata) \ 174aab94339SDirk Brandewie VMLINUX_SYMBOL(__dtb_end) = .; 175aab94339SDirk Brandewie 176ca967258SSam Ravnborg /* .data section */ 177ca967258SSam Ravnborg #define DATA_DATA \ 1780e0d314eSSam Ravnborg *(.data) \ 179312b1485SSam Ravnborg *(.ref.data) \ 180d356c0b6SMike Frysinger *(.data..shared_aligned) /* percpu related */ \ 181eb8f6890SSam Ravnborg MEM_KEEP(init.data) \ 182eb8f6890SSam Ravnborg MEM_KEEP(exit.data) \ 1837ccaba53SJan Beulich *(.data.unlikely) \ 18465498646SMathieu Desnoyers STRUCT_ALIGN(); \ 18597e1c18eSMathieu Desnoyers *(__tracepoints) \ 186e9d376f0SJason Baron /* implement dynamic printk debug */ \ 187e9d376f0SJason Baron . = ALIGN(8); \ 188d430d3d7SJason Baron VMLINUX_SYMBOL(__start___jump_table) = .; \ 189d430d3d7SJason Baron *(__jump_table) \ 190d430d3d7SJason Baron VMLINUX_SYMBOL(__stop___jump_table) = .; \ 191d430d3d7SJason Baron . = ALIGN(8); \ 192e9d376f0SJason Baron VMLINUX_SYMBOL(__start___verbose) = .; \ 193e9d376f0SJason Baron *(__verbose) \ 194e9d376f0SJason Baron VMLINUX_SYMBOL(__stop___verbose) = .; \ 1952bcd521aSSteven Rostedt LIKELY_PROFILE() \ 196b77e38aaSSteven Rostedt BRANCH_PROFILE() \ 197102c9323SSteven Rostedt (Red Hat) TRACE_PRINTKS() \ 198102c9323SSteven Rostedt (Red Hat) TRACEPOINT_STR() 199ca967258SSam Ravnborg 200ef53dae8SSam Ravnborg /* 201ef53dae8SSam Ravnborg * Data section helpers 202ef53dae8SSam Ravnborg */ 203ef53dae8SSam Ravnborg #define NOSAVE_DATA \ 204ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 205ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__nosave_begin) = .; \ 20607b3bb1eSDenys Vlasenko *(.data..nosave) \ 207ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 208ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__nosave_end) = .; 209ef53dae8SSam Ravnborg 210ef53dae8SSam Ravnborg #define PAGE_ALIGNED_DATA(page_align) \ 211ef53dae8SSam Ravnborg . = ALIGN(page_align); \ 21275b13483STim Abbott *(.data..page_aligned) 213ef53dae8SSam Ravnborg 214ef53dae8SSam Ravnborg #define READ_MOSTLY_DATA(align) \ 215ef53dae8SSam Ravnborg . = ALIGN(align); \ 2168369744fSShaohua Li *(.data..read_mostly) \ 2178369744fSShaohua Li . = ALIGN(align); 218ef53dae8SSam Ravnborg 219ef53dae8SSam Ravnborg #define CACHELINE_ALIGNED_DATA(align) \ 220ef53dae8SSam Ravnborg . = ALIGN(align); \ 2214af57b78STim Abbott *(.data..cacheline_aligned) 222ef53dae8SSam Ravnborg 22339a449d9STim Abbott #define INIT_TASK_DATA(align) \ 224ef53dae8SSam Ravnborg . = ALIGN(align); \ 2252af7687fSTim Abbott *(.data..init_task) 226ef53dae8SSam Ravnborg 227ef53dae8SSam Ravnborg /* 228ef53dae8SSam Ravnborg * Read only Data 229ef53dae8SSam Ravnborg */ 230ef53dae8SSam Ravnborg #define RO_DATA_SECTION(align) \ 2314096b46fSSam Ravnborg . = ALIGN((align)); \ 2321da177e4SLinus Torvalds .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 2336569580dSVivek Goyal VMLINUX_SYMBOL(__start_rodata) = .; \ 2341da177e4SLinus Torvalds *(.rodata) *(.rodata.*) \ 2351da177e4SLinus Torvalds *(__vermagic) /* Kernel version magic */ \ 23665498646SMathieu Desnoyers . = ALIGN(8); \ 23765498646SMathieu Desnoyers VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ 23865498646SMathieu Desnoyers *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ 23965498646SMathieu Desnoyers VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ 24097e1c18eSMathieu Desnoyers *(__tracepoints_strings)/* Tracepoints: strings */ \ 2411da177e4SLinus Torvalds } \ 2421da177e4SLinus Torvalds \ 2431da177e4SLinus Torvalds .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 2441da177e4SLinus Torvalds *(.rodata1) \ 2451da177e4SLinus Torvalds } \ 2461da177e4SLinus Torvalds \ 2476360b1fbSJan Beulich BUG_TABLE \ 2486360b1fbSJan Beulich \ 2491da177e4SLinus Torvalds /* PCI quirks */ \ 2501da177e4SLinus Torvalds .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 2511da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 2521da177e4SLinus Torvalds *(.pci_fixup_early) \ 2531da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 2541da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 2551da177e4SLinus Torvalds *(.pci_fixup_header) \ 2561da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 2571da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 2581da177e4SLinus Torvalds *(.pci_fixup_final) \ 2591da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 2601da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 2611da177e4SLinus Torvalds *(.pci_fixup_enable) \ 2621da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 2631597cacbSAlan Cox VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 2641597cacbSAlan Cox *(.pci_fixup_resume) \ 2651597cacbSAlan Cox VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 266e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 267e1a2a51eSRafael J. Wysocki *(.pci_fixup_resume_early) \ 268e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 269e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 270e1a2a51eSRafael J. Wysocki *(.pci_fixup_suspend) \ 271e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 2721da177e4SLinus Torvalds } \ 2731da177e4SLinus Torvalds \ 2745658c769SDavid Woodhouse /* Built-in firmware blobs */ \ 2755658c769SDavid Woodhouse .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 2765658c769SDavid Woodhouse VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 2775658c769SDavid Woodhouse *(.builtin_fw) \ 2785658c769SDavid Woodhouse VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 2795658c769SDavid Woodhouse } \ 2805658c769SDavid Woodhouse \ 28163687a52SJan Beulich TRACEDATA \ 28263687a52SJan Beulich \ 2831da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 2841da177e4SLinus Torvalds __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 2851da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___ksymtab) = .; \ 286f02e8a65SAlessio Igor Bogani *(SORT(___ksymtab+*)) \ 2871da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 2881da177e4SLinus Torvalds } \ 2891da177e4SLinus Torvalds \ 2901da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 2911da177e4SLinus Torvalds __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 2921da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 293f02e8a65SAlessio Igor Bogani *(SORT(___ksymtab_gpl+*)) \ 2941da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 2951da177e4SLinus Torvalds } \ 2961da177e4SLinus Torvalds \ 297f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 298f71d20e9SArjan van de Ven __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 299f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 300f02e8a65SAlessio Igor Bogani *(SORT(___ksymtab_unused+*)) \ 301f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 302f71d20e9SArjan van de Ven } \ 303f71d20e9SArjan van de Ven \ 304f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 305f71d20e9SArjan van de Ven __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 306f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 307f02e8a65SAlessio Igor Bogani *(SORT(___ksymtab_unused_gpl+*)) \ 308f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 309f71d20e9SArjan van de Ven } \ 310f71d20e9SArjan van de Ven \ 3119f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 3129f28bb7eSGreg Kroah-Hartman __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 3139f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 314f02e8a65SAlessio Igor Bogani *(SORT(___ksymtab_gpl_future+*)) \ 3159f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 3169f28bb7eSGreg Kroah-Hartman } \ 3179f28bb7eSGreg Kroah-Hartman \ 3181da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 3191da177e4SLinus Torvalds __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 3201da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___kcrctab) = .; \ 321f02e8a65SAlessio Igor Bogani *(SORT(___kcrctab+*)) \ 3221da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 3231da177e4SLinus Torvalds } \ 3241da177e4SLinus Torvalds \ 3251da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 3261da177e4SLinus Torvalds __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 3271da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 328f02e8a65SAlessio Igor Bogani *(SORT(___kcrctab_gpl+*)) \ 3291da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 3301da177e4SLinus Torvalds } \ 3311da177e4SLinus Torvalds \ 332f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 333f71d20e9SArjan van de Ven __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 334f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 335f02e8a65SAlessio Igor Bogani *(SORT(___kcrctab_unused+*)) \ 336f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 337f71d20e9SArjan van de Ven } \ 338f71d20e9SArjan van de Ven \ 339f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 340f71d20e9SArjan van de Ven __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 341f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 342f02e8a65SAlessio Igor Bogani *(SORT(___kcrctab_unused_gpl+*)) \ 343f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 344f71d20e9SArjan van de Ven } \ 345f71d20e9SArjan van de Ven \ 3469f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 3479f28bb7eSGreg Kroah-Hartman __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 3489f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 349f02e8a65SAlessio Igor Bogani *(SORT(___kcrctab_gpl_future+*)) \ 3509f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 3519f28bb7eSGreg Kroah-Hartman } \ 3529f28bb7eSGreg Kroah-Hartman \ 3531da177e4SLinus Torvalds /* Kernel symbol table: strings */ \ 3541da177e4SLinus Torvalds __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 3551da177e4SLinus Torvalds *(__ksymtab_strings) \ 3561da177e4SLinus Torvalds } \ 3571da177e4SLinus Torvalds \ 358eb8f6890SSam Ravnborg /* __*init sections */ \ 359eb8f6890SSam Ravnborg __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 360312b1485SSam Ravnborg *(.ref.rodata) \ 361eb8f6890SSam Ravnborg MEM_KEEP(init.rodata) \ 362eb8f6890SSam Ravnborg MEM_KEEP(exit.rodata) \ 363eb8f6890SSam Ravnborg } \ 364eb8f6890SSam Ravnborg \ 3651da177e4SLinus Torvalds /* Built-in module parameters. */ \ 3661da177e4SLinus Torvalds __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 3671da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___param) = .; \ 3681da177e4SLinus Torvalds *(__param) \ 3691da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___param) = .; \ 370e94965edSDmitry Torokhov } \ 371e94965edSDmitry Torokhov \ 372e94965edSDmitry Torokhov /* Built-in module versions. */ \ 373e94965edSDmitry Torokhov __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 374e94965edSDmitry Torokhov VMLINUX_SYMBOL(__start___modver) = .; \ 375e94965edSDmitry Torokhov *(__modver) \ 376e94965edSDmitry Torokhov VMLINUX_SYMBOL(__stop___modver) = .; \ 377edeed305SArjan van de Ven . = ALIGN((align)); \ 3786569580dSVivek Goyal VMLINUX_SYMBOL(__end_rodata) = .; \ 3797583ddfdSMarcelo Tosatti } \ 3804096b46fSSam Ravnborg . = ALIGN((align)); 3814096b46fSSam Ravnborg 382ef53dae8SSam Ravnborg /* RODATA & RO_DATA provided for backward compatibility. 3834096b46fSSam Ravnborg * All archs are supposed to use RO_DATA() */ 384ef53dae8SSam Ravnborg #define RODATA RO_DATA_SECTION(4096) 385ef53dae8SSam Ravnborg #define RO_DATA(align) RO_DATA_SECTION(align) 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds #define SECURITY_INIT \ 38860bad7faSEric W. Biederman .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 3891da177e4SLinus Torvalds VMLINUX_SYMBOL(__security_initcall_start) = .; \ 3901da177e4SLinus Torvalds *(.security_initcall.init) \ 3911da177e4SLinus Torvalds VMLINUX_SYMBOL(__security_initcall_end) = .; \ 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds 3947664709bSSam Ravnborg /* .text section. Map to function alignment to avoid address changes 3957664709bSSam Ravnborg * during second ld run in second ld pass when generating System.map */ 3967664709bSSam Ravnborg #define TEXT_TEXT \ 3977664709bSSam Ravnborg ALIGN_FUNCTION(); \ 398fb5e2b37SJan Beulich *(.text.hot) \ 3990e0d314eSSam Ravnborg *(.text) \ 400312b1485SSam Ravnborg *(.ref.text) \ 401eb8f6890SSam Ravnborg MEM_KEEP(init.text) \ 402fb5e2b37SJan Beulich MEM_KEEP(exit.text) \ 403fb5e2b37SJan Beulich *(.text.unlikely) 404eb8f6890SSam Ravnborg 4057664709bSSam Ravnborg 4066d30e3a8SSam Ravnborg /* sched.text is aling to function alignment to secure we have same 4076d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 4081da177e4SLinus Torvalds #define SCHED_TEXT \ 4096d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 4101da177e4SLinus Torvalds VMLINUX_SYMBOL(__sched_text_start) = .; \ 4111da177e4SLinus Torvalds *(.sched.text) \ 4121da177e4SLinus Torvalds VMLINUX_SYMBOL(__sched_text_end) = .; 4131da177e4SLinus Torvalds 4146d30e3a8SSam Ravnborg /* spinlock.text is aling to function alignment to secure we have same 4156d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 4161da177e4SLinus Torvalds #define LOCK_TEXT \ 4176d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 4181da177e4SLinus Torvalds VMLINUX_SYMBOL(__lock_text_start) = .; \ 4191da177e4SLinus Torvalds *(.spinlock.text) \ 4201da177e4SLinus Torvalds VMLINUX_SYMBOL(__lock_text_end) = .; 421d0aaff97SPrasanna S Panchamukhi 422d0aaff97SPrasanna S Panchamukhi #define KPROBES_TEXT \ 423d0aaff97SPrasanna S Panchamukhi ALIGN_FUNCTION(); \ 424d0aaff97SPrasanna S Panchamukhi VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 425d0aaff97SPrasanna S Panchamukhi *(.kprobes.text) \ 426d0aaff97SPrasanna S Panchamukhi VMLINUX_SYMBOL(__kprobes_text_end) = .; 427a7d0c210SPaolo 'Blaisorblade' Giarrusso 428ea714547SJiri Olsa #define ENTRY_TEXT \ 429ea714547SJiri Olsa ALIGN_FUNCTION(); \ 430ea714547SJiri Olsa VMLINUX_SYMBOL(__entry_text_start) = .; \ 431ea714547SJiri Olsa *(.entry.text) \ 432ea714547SJiri Olsa VMLINUX_SYMBOL(__entry_text_end) = .; 433ea714547SJiri Olsa 434a0343e82SFrederic Weisbecker #ifdef CONFIG_FUNCTION_GRAPH_TRACER 435a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT \ 436a0343e82SFrederic Weisbecker ALIGN_FUNCTION(); \ 437a0343e82SFrederic Weisbecker VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 438a0343e82SFrederic Weisbecker *(.irqentry.text) \ 439a0343e82SFrederic Weisbecker VMLINUX_SYMBOL(__irqentry_text_end) = .; 440a0343e82SFrederic Weisbecker #else 441a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT 442a0343e82SFrederic Weisbecker #endif 443a0343e82SFrederic Weisbecker 44437c514e3SSam Ravnborg /* Section used for early init (in .S files) */ 4457923f90fSSam Ravnborg #define HEAD_TEXT *(.head.text) 44637c514e3SSam Ravnborg 4477923f90fSSam Ravnborg #define HEAD_TEXT_SECTION \ 448ef53dae8SSam Ravnborg .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 449ef53dae8SSam Ravnborg HEAD_TEXT \ 450ef53dae8SSam Ravnborg } 451ef53dae8SSam Ravnborg 452ef53dae8SSam Ravnborg /* 453ef53dae8SSam Ravnborg * Exception table 454ef53dae8SSam Ravnborg */ 455ef53dae8SSam Ravnborg #define EXCEPTION_TABLE(align) \ 456ef53dae8SSam Ravnborg . = ALIGN(align); \ 457ef53dae8SSam Ravnborg __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 458ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__start___ex_table) = .; \ 459ef53dae8SSam Ravnborg *(__ex_table) \ 460ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__stop___ex_table) = .; \ 461ef53dae8SSam Ravnborg } 462ef53dae8SSam Ravnborg 463ef53dae8SSam Ravnborg /* 464ef53dae8SSam Ravnborg * Init task 465ef53dae8SSam Ravnborg */ 46639a449d9STim Abbott #define INIT_TASK_DATA_SECTION(align) \ 467ef53dae8SSam Ravnborg . = ALIGN(align); \ 468da5e37efSSam Ravnborg .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 46939a449d9STim Abbott INIT_TASK_DATA(align) \ 470ef53dae8SSam Ravnborg } 471eb8f6890SSam Ravnborg 472b99b87f7SPeter Oberparleiter #ifdef CONFIG_CONSTRUCTORS 4732a2325e6SHeiko Carstens #define KERNEL_CTORS() . = ALIGN(8); \ 4742a2325e6SHeiko Carstens VMLINUX_SYMBOL(__ctors_start) = .; \ 475b99b87f7SPeter Oberparleiter *(.ctors) \ 476eb3057dfSFrantisek Hrbata *(.init_array) \ 477b99b87f7SPeter Oberparleiter VMLINUX_SYMBOL(__ctors_end) = .; 478b99b87f7SPeter Oberparleiter #else 479b99b87f7SPeter Oberparleiter #define KERNEL_CTORS() 480b99b87f7SPeter Oberparleiter #endif 481b99b87f7SPeter Oberparleiter 48201ba2bdcSSam Ravnborg /* init and exit section handling */ 483eb8f6890SSam Ravnborg #define INIT_DATA \ 484eb8f6890SSam Ravnborg *(.init.data) \ 485eb8f6890SSam Ravnborg MEM_DISCARD(init.data) \ 486b99b87f7SPeter Oberparleiter KERNEL_CTORS() \ 4874b3b4c5eSJohn Reiser MCOUNT_REC() \ 4889fd49328SSteven Rostedt *(.init.rodata) \ 489e4a9ea5eSSteven Rostedt FTRACE_EVENTS() \ 4903d56e331SSteven Rostedt TRACE_SYSCALLS() \ 491aab94339SDirk Brandewie MEM_DISCARD(init.rodata) \ 492f2f6c255SPrashant Gaikwad CLK_OF_TABLES() \ 493ae278a93SStephen Warren CLKSRC_OF_TABLES() \ 494f6e916b8SThomas Petazzoni KERNEL_DTB() \ 495f6e916b8SThomas Petazzoni IRQCHIP_OF_MATCH_TABLE() 49601ba2bdcSSam Ravnborg 497eb8f6890SSam Ravnborg #define INIT_TEXT \ 498eb8f6890SSam Ravnborg *(.init.text) \ 499eb8f6890SSam Ravnborg MEM_DISCARD(init.text) 500eb8f6890SSam Ravnborg 501eb8f6890SSam Ravnborg #define EXIT_DATA \ 502eb8f6890SSam Ravnborg *(.exit.data) \ 503eb8f6890SSam Ravnborg MEM_DISCARD(exit.data) \ 504eb8f6890SSam Ravnborg MEM_DISCARD(exit.rodata) 505eb8f6890SSam Ravnborg 506eb8f6890SSam Ravnborg #define EXIT_TEXT \ 507eb8f6890SSam Ravnborg *(.exit.text) \ 508eb8f6890SSam Ravnborg MEM_DISCARD(exit.text) 50901ba2bdcSSam Ravnborg 5107923f90fSSam Ravnborg #define EXIT_CALL \ 5117923f90fSSam Ravnborg *(.exitcall.exit) 5127923f90fSSam Ravnborg 513ef53dae8SSam Ravnborg /* 514ef53dae8SSam Ravnborg * bss (Block Started by Symbol) - uninitialized data 515ef53dae8SSam Ravnborg * zeroed during startup 516ef53dae8SSam Ravnborg */ 51704e448d9STim Abbott #define SBSS(sbss_align) \ 51804e448d9STim Abbott . = ALIGN(sbss_align); \ 519ef53dae8SSam Ravnborg .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 520ef53dae8SSam Ravnborg *(.sbss) \ 521ef53dae8SSam Ravnborg *(.scommon) \ 522ef53dae8SSam Ravnborg } 523ef53dae8SSam Ravnborg 524c87728caSDavid Daney /* 525c87728caSDavid Daney * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 526c87728caSDavid Daney * sections to the front of bss. 527c87728caSDavid Daney */ 528c87728caSDavid Daney #ifndef BSS_FIRST_SECTIONS 529c87728caSDavid Daney #define BSS_FIRST_SECTIONS 530c87728caSDavid Daney #endif 531c87728caSDavid Daney 532ef53dae8SSam Ravnborg #define BSS(bss_align) \ 533ef53dae8SSam Ravnborg . = ALIGN(bss_align); \ 534ef53dae8SSam Ravnborg .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 535c87728caSDavid Daney BSS_FIRST_SECTIONS \ 5367c74df07STim Abbott *(.bss..page_aligned) \ 537ef53dae8SSam Ravnborg *(.dynbss) \ 538ef53dae8SSam Ravnborg *(.bss) \ 539ef53dae8SSam Ravnborg *(COMMON) \ 540ef53dae8SSam Ravnborg } 541ef53dae8SSam Ravnborg 542ef53dae8SSam Ravnborg /* 543ef53dae8SSam Ravnborg * DWARF debug sections. 544ef53dae8SSam Ravnborg * Symbols in the DWARF debugging sections are relative to 545ef53dae8SSam Ravnborg * the beginning of the section so we begin them at 0. 546ef53dae8SSam Ravnborg */ 547a7d0c210SPaolo 'Blaisorblade' Giarrusso #define DWARF_DEBUG \ 548a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1 */ \ 549a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug 0 : { *(.debug) } \ 550a7d0c210SPaolo 'Blaisorblade' Giarrusso .line 0 : { *(.line) } \ 551a7d0c210SPaolo 'Blaisorblade' Giarrusso /* GNU DWARF 1 extensions */ \ 552a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 553a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_sfnames 0 : { *(.debug_sfnames) } \ 554a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1.1 and DWARF 2 */ \ 555a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_aranges 0 : { *(.debug_aranges) } \ 556a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_pubnames 0 : { *(.debug_pubnames) } \ 557a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 2 */ \ 558a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_info 0 : { *(.debug_info \ 559a7d0c210SPaolo 'Blaisorblade' Giarrusso .gnu.linkonce.wi.*) } \ 560a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_abbrev 0 : { *(.debug_abbrev) } \ 561a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_line 0 : { *(.debug_line) } \ 562a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_frame 0 : { *(.debug_frame) } \ 563a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_str 0 : { *(.debug_str) } \ 564a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_loc 0 : { *(.debug_loc) } \ 565a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_macinfo 0 : { *(.debug_macinfo) } \ 566a7d0c210SPaolo 'Blaisorblade' Giarrusso /* SGI/MIPS DWARF 2 extensions */ \ 567a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_weaknames 0 : { *(.debug_weaknames) } \ 568a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_funcnames 0 : { *(.debug_funcnames) } \ 569a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_typenames 0 : { *(.debug_typenames) } \ 570a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_varnames 0 : { *(.debug_varnames) } \ 571a7d0c210SPaolo 'Blaisorblade' Giarrusso 572a7d0c210SPaolo 'Blaisorblade' Giarrusso /* Stabs debugging sections. */ 573a7d0c210SPaolo 'Blaisorblade' Giarrusso #define STABS_DEBUG \ 574a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab 0 : { *(.stab) } \ 575a7d0c210SPaolo 'Blaisorblade' Giarrusso .stabstr 0 : { *(.stabstr) } \ 576a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.excl 0 : { *(.stab.excl) } \ 577a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.exclstr 0 : { *(.stab.exclstr) } \ 578a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.index 0 : { *(.stab.index) } \ 579a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.indexstr 0 : { *(.stab.indexstr) } \ 580a7d0c210SPaolo 'Blaisorblade' Giarrusso .comment 0 : { *(.comment) } 5819c9b8b38SJeremy Fitzhardinge 5826360b1fbSJan Beulich #ifdef CONFIG_GENERIC_BUG 5837664c5a1SJeremy Fitzhardinge #define BUG_TABLE \ 5847664c5a1SJeremy Fitzhardinge . = ALIGN(8); \ 5857664c5a1SJeremy Fitzhardinge __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 586c6de0026SYoshinori Sato VMLINUX_SYMBOL(__start___bug_table) = .; \ 5877664c5a1SJeremy Fitzhardinge *(__bug_table) \ 588c6de0026SYoshinori Sato VMLINUX_SYMBOL(__stop___bug_table) = .; \ 5897664c5a1SJeremy Fitzhardinge } 5906360b1fbSJan Beulich #else 5916360b1fbSJan Beulich #define BUG_TABLE 5926360b1fbSJan Beulich #endif 5937664c5a1SJeremy Fitzhardinge 59463687a52SJan Beulich #ifdef CONFIG_PM_TRACE 59563687a52SJan Beulich #define TRACEDATA \ 59663687a52SJan Beulich . = ALIGN(4); \ 59763687a52SJan Beulich .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 598c6de0026SYoshinori Sato VMLINUX_SYMBOL(__tracedata_start) = .; \ 59963687a52SJan Beulich *(.tracedata) \ 600c6de0026SYoshinori Sato VMLINUX_SYMBOL(__tracedata_end) = .; \ 60163687a52SJan Beulich } 60263687a52SJan Beulich #else 60363687a52SJan Beulich #define TRACEDATA 60463687a52SJan Beulich #endif 60563687a52SJan Beulich 6069c9b8b38SJeremy Fitzhardinge #define NOTES \ 607cbe87121SRoland McGrath .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 608cbe87121SRoland McGrath VMLINUX_SYMBOL(__start_notes) = .; \ 609cbe87121SRoland McGrath *(.note.*) \ 610cbe87121SRoland McGrath VMLINUX_SYMBOL(__stop_notes) = .; \ 611cbe87121SRoland McGrath } 61261ce1efeSAndrew Morton 613ef53dae8SSam Ravnborg #define INIT_SETUP(initsetup_align) \ 614ef53dae8SSam Ravnborg . = ALIGN(initsetup_align); \ 615ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__setup_start) = .; \ 616ef53dae8SSam Ravnborg *(.init.setup) \ 617ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__setup_end) = .; 618ef53dae8SSam Ravnborg 619026cee00SPawel Moll #define INIT_CALLS_LEVEL(level) \ 620026cee00SPawel Moll VMLINUX_SYMBOL(__initcall##level##_start) = .; \ 621026cee00SPawel Moll *(.initcall##level##.init) \ 622026cee00SPawel Moll *(.initcall##level##s.init) \ 62361ce1efeSAndrew Morton 624ef53dae8SSam Ravnborg #define INIT_CALLS \ 625ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initcall_start) = .; \ 626026cee00SPawel Moll *(.initcallearly.init) \ 627026cee00SPawel Moll INIT_CALLS_LEVEL(0) \ 628026cee00SPawel Moll INIT_CALLS_LEVEL(1) \ 629026cee00SPawel Moll INIT_CALLS_LEVEL(2) \ 630026cee00SPawel Moll INIT_CALLS_LEVEL(3) \ 631026cee00SPawel Moll INIT_CALLS_LEVEL(4) \ 632026cee00SPawel Moll INIT_CALLS_LEVEL(5) \ 633026cee00SPawel Moll INIT_CALLS_LEVEL(rootfs) \ 634026cee00SPawel Moll INIT_CALLS_LEVEL(6) \ 635026cee00SPawel Moll INIT_CALLS_LEVEL(7) \ 636ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initcall_end) = .; 637ef53dae8SSam Ravnborg 638ef53dae8SSam Ravnborg #define CON_INITCALL \ 639ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__con_initcall_start) = .; \ 640ef53dae8SSam Ravnborg *(.con_initcall.init) \ 641ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__con_initcall_end) = .; 642ef53dae8SSam Ravnborg 643ef53dae8SSam Ravnborg #define SECURITY_INITCALL \ 644ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__security_initcall_start) = .; \ 645ef53dae8SSam Ravnborg *(.security_initcall.init) \ 646ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__security_initcall_end) = .; 647ef53dae8SSam Ravnborg 648ef53dae8SSam Ravnborg #ifdef CONFIG_BLK_DEV_INITRD 649ef53dae8SSam Ravnborg #define INIT_RAM_FS \ 650d8826262SMike Frysinger . = ALIGN(4); \ 651ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initramfs_start) = .; \ 652ef53dae8SSam Ravnborg *(.init.ramfs) \ 653ffe8018cSHendrik Brueckner . = ALIGN(8); \ 654ffe8018cSHendrik Brueckner *(.init.ramfs.info) 655ef53dae8SSam Ravnborg #else 656eadfe219SDavid Howells #define INIT_RAM_FS 657ef53dae8SSam Ravnborg #endif 658ef53dae8SSam Ravnborg 659023bf6f1STejun Heo /* 660023bf6f1STejun Heo * Default discarded sections. 661023bf6f1STejun Heo * 662023bf6f1STejun Heo * Some archs want to discard exit text/data at runtime rather than 663023bf6f1STejun Heo * link time due to cross-section references such as alt instructions, 664023bf6f1STejun Heo * bug table, eh_frame, etc. DISCARDS must be the last of output 665023bf6f1STejun Heo * section definitions so that such archs put those in earlier section 666023bf6f1STejun Heo * definitions. 667023bf6f1STejun Heo */ 668405d967dSTejun Heo #define DISCARDS \ 669405d967dSTejun Heo /DISCARD/ : { \ 670405d967dSTejun Heo EXIT_TEXT \ 671405d967dSTejun Heo EXIT_DATA \ 672023bf6f1STejun Heo EXIT_CALL \ 673405d967dSTejun Heo *(.discard) \ 674c7f52cdcSJeremy Fitzhardinge *(.discard.*) \ 675405d967dSTejun Heo } 676405d967dSTejun Heo 6773e5d8f97STejun Heo /** 6786ea0c34dSMike Frysinger * PERCPU_INPUT - the percpu input sections 6796ea0c34dSMike Frysinger * @cacheline: cacheline size 6806ea0c34dSMike Frysinger * 6816ea0c34dSMike Frysinger * The core percpu section names and core symbols which do not rely 6826ea0c34dSMike Frysinger * directly upon load addresses. 6836ea0c34dSMike Frysinger * 6846ea0c34dSMike Frysinger * @cacheline is used to align subsections to avoid false cacheline 6856ea0c34dSMike Frysinger * sharing between subsections for different purposes. 6866ea0c34dSMike Frysinger */ 6876ea0c34dSMike Frysinger #define PERCPU_INPUT(cacheline) \ 6886ea0c34dSMike Frysinger VMLINUX_SYMBOL(__per_cpu_start) = .; \ 6896ea0c34dSMike Frysinger *(.data..percpu..first) \ 6906ea0c34dSMike Frysinger . = ALIGN(PAGE_SIZE); \ 6916ea0c34dSMike Frysinger *(.data..percpu..page_aligned) \ 6926ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 6936ea0c34dSMike Frysinger *(.data..percpu..readmostly) \ 6946ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 6956ea0c34dSMike Frysinger *(.data..percpu) \ 6966ea0c34dSMike Frysinger *(.data..percpu..shared_aligned) \ 6976ea0c34dSMike Frysinger VMLINUX_SYMBOL(__per_cpu_end) = .; 6986ea0c34dSMike Frysinger 6996ea0c34dSMike Frysinger /** 7006b7c38d5STejun Heo * PERCPU_VADDR - define output section for percpu area 70119df0c2fSTejun Heo * @cacheline: cacheline size 7023e5d8f97STejun Heo * @vaddr: explicit base address (optional) 7033e5d8f97STejun Heo * @phdr: destination PHDR (optional) 7043e5d8f97STejun Heo * 70519df0c2fSTejun Heo * Macro which expands to output section for percpu area. 70619df0c2fSTejun Heo * 70719df0c2fSTejun Heo * @cacheline is used to align subsections to avoid false cacheline 70819df0c2fSTejun Heo * sharing between subsections for different purposes. 70919df0c2fSTejun Heo * 71019df0c2fSTejun Heo * If @vaddr is not blank, it specifies explicit base address and all 71119df0c2fSTejun Heo * percpu symbols will be offset from the given address. If blank, 71219df0c2fSTejun Heo * @vaddr always equals @laddr + LOAD_OFFSET. 7133e5d8f97STejun Heo * 7143e5d8f97STejun Heo * @phdr defines the output PHDR to use if not blank. Be warned that 7153e5d8f97STejun Heo * output PHDR is sticky. If @phdr is specified, the next output 7163e5d8f97STejun Heo * section in the linker script will go there too. @phdr should have 7173e5d8f97STejun Heo * a leading colon. 7183e5d8f97STejun Heo * 7193ac6cffeSTejun Heo * Note that this macros defines __per_cpu_load as an absolute symbol. 7203ac6cffeSTejun Heo * If there is no need to put the percpu section at a predetermined 7210415b00dSTejun Heo * address, use PERCPU_SECTION. 7223e5d8f97STejun Heo */ 72319df0c2fSTejun Heo #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 724dba3d36bSIngo Molnar VMLINUX_SYMBOL(__per_cpu_load) = .; \ 7253d9a854cSDenys Vlasenko .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 7266b7c38d5STejun Heo - LOAD_OFFSET) { \ 7276ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 7286b7c38d5STejun Heo } phdr \ 7293d9a854cSDenys Vlasenko . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); 7303e5d8f97STejun Heo 7313e5d8f97STejun Heo /** 7320415b00dSTejun Heo * PERCPU_SECTION - define output section for percpu area, simple version 73319df0c2fSTejun Heo * @cacheline: cacheline size 7343e5d8f97STejun Heo * 7350415b00dSTejun Heo * Align to PAGE_SIZE and outputs output section for percpu area. This 7360415b00dSTejun Heo * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 7373e5d8f97STejun Heo * __per_cpu_start will be identical. 7383ac6cffeSTejun Heo * 7390415b00dSTejun Heo * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 74019df0c2fSTejun Heo * except that __per_cpu_load is defined as a relative symbol against 74119df0c2fSTejun Heo * .data..percpu which is required for relocatable x86_32 configuration. 7423e5d8f97STejun Heo */ 7430415b00dSTejun Heo #define PERCPU_SECTION(cacheline) \ 7440415b00dSTejun Heo . = ALIGN(PAGE_SIZE); \ 7453d9a854cSDenys Vlasenko .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 7463ac6cffeSTejun Heo VMLINUX_SYMBOL(__per_cpu_load) = .; \ 7476ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 7483ac6cffeSTejun Heo } 749ef53dae8SSam Ravnborg 750ef53dae8SSam Ravnborg 751ef53dae8SSam Ravnborg /* 752ef53dae8SSam Ravnborg * Definition of the high level *_SECTION macros 753ef53dae8SSam Ravnborg * They will fit only a subset of the architectures 754ef53dae8SSam Ravnborg */ 755ef53dae8SSam Ravnborg 756ef53dae8SSam Ravnborg 757ef53dae8SSam Ravnborg /* 758ef53dae8SSam Ravnborg * Writeable data. 759ef53dae8SSam Ravnborg * All sections are combined in a single .data section. 760ef53dae8SSam Ravnborg * The sections following CONSTRUCTORS are arranged so their 761ef53dae8SSam Ravnborg * typical alignment matches. 762ef53dae8SSam Ravnborg * A cacheline is typical/always less than a PAGE_SIZE so 763ef53dae8SSam Ravnborg * the sections that has this restriction (or similar) 764ef53dae8SSam Ravnborg * is located before the ones requiring PAGE_SIZE alignment. 765ef53dae8SSam Ravnborg * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 76625985edcSLucas De Marchi * matches the requirement of PAGE_ALIGNED_DATA. 767ef53dae8SSam Ravnborg * 7687923f90fSSam Ravnborg * use 0 as page_align if page_aligned data is not used */ 76973f1d939SPaul Mundt #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 770ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 771ef53dae8SSam Ravnborg .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 77239a449d9STim Abbott INIT_TASK_DATA(inittask) \ 7731b208622STim Abbott NOSAVE_DATA \ 7741b208622STim Abbott PAGE_ALIGNED_DATA(pagealigned) \ 775ef53dae8SSam Ravnborg CACHELINE_ALIGNED_DATA(cacheline) \ 776ef53dae8SSam Ravnborg READ_MOSTLY_DATA(cacheline) \ 777ef53dae8SSam Ravnborg DATA_DATA \ 778ef53dae8SSam Ravnborg CONSTRUCTORS \ 779ef53dae8SSam Ravnborg } 780ef53dae8SSam Ravnborg 781ef53dae8SSam Ravnborg #define INIT_TEXT_SECTION(inittext_align) \ 782ef53dae8SSam Ravnborg . = ALIGN(inittext_align); \ 783ef53dae8SSam Ravnborg .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 784ef53dae8SSam Ravnborg VMLINUX_SYMBOL(_sinittext) = .; \ 785ef53dae8SSam Ravnborg INIT_TEXT \ 786ef53dae8SSam Ravnborg VMLINUX_SYMBOL(_einittext) = .; \ 787ef53dae8SSam Ravnborg } 788ef53dae8SSam Ravnborg 789ef53dae8SSam Ravnborg #define INIT_DATA_SECTION(initsetup_align) \ 790ef53dae8SSam Ravnborg .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 791ef53dae8SSam Ravnborg INIT_DATA \ 792ef53dae8SSam Ravnborg INIT_SETUP(initsetup_align) \ 793ef53dae8SSam Ravnborg INIT_CALLS \ 794ef53dae8SSam Ravnborg CON_INITCALL \ 795ef53dae8SSam Ravnborg SECURITY_INITCALL \ 796ef53dae8SSam Ravnborg INIT_RAM_FS \ 797ef53dae8SSam Ravnborg } 798ef53dae8SSam Ravnborg 79904e448d9STim Abbott #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 80004e448d9STim Abbott . = ALIGN(sbss_align); \ 80104e448d9STim Abbott VMLINUX_SYMBOL(__bss_start) = .; \ 80204e448d9STim Abbott SBSS(sbss_align) \ 803ef53dae8SSam Ravnborg BSS(bss_align) \ 80404e448d9STim Abbott . = ALIGN(stop_align); \ 80504e448d9STim Abbott VMLINUX_SYMBOL(__bss_stop) = .; 806