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(...) 18ef53dae8SSam Ravnborg * PERCPU(PAGE_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 551da177e4SLinus Torvalds #ifndef VMLINUX_SYMBOL 561da177e4SLinus Torvalds #define VMLINUX_SYMBOL(_sym_) _sym_ 571da177e4SLinus Torvalds #endif 581da177e4SLinus Torvalds 596d30e3a8SSam Ravnborg /* Align . to a 8 byte boundary equals to maximum function alignment. */ 606d30e3a8SSam Ravnborg #define ALIGN_FUNCTION() . = ALIGN(8) 616d30e3a8SSam Ravnborg 62eb8f6890SSam Ravnborg /* The actual configuration determine if the init/exit sections 63eb8f6890SSam Ravnborg * are handled as text/data or they can be discarded (which 64eb8f6890SSam Ravnborg * often happens at runtime) 65eb8f6890SSam Ravnborg */ 66eb8f6890SSam Ravnborg #ifdef CONFIG_HOTPLUG 67eb8f6890SSam Ravnborg #define DEV_KEEP(sec) *(.dev##sec) 68eb8f6890SSam Ravnborg #define DEV_DISCARD(sec) 69eb8f6890SSam Ravnborg #else 70eb8f6890SSam Ravnborg #define DEV_KEEP(sec) 71eb8f6890SSam Ravnborg #define DEV_DISCARD(sec) *(.dev##sec) 72eb8f6890SSam Ravnborg #endif 73eb8f6890SSam Ravnborg 74eb8f6890SSam Ravnborg #ifdef CONFIG_HOTPLUG_CPU 75eb8f6890SSam Ravnborg #define CPU_KEEP(sec) *(.cpu##sec) 76eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) 77eb8f6890SSam Ravnborg #else 78eb8f6890SSam Ravnborg #define CPU_KEEP(sec) 79eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) *(.cpu##sec) 80eb8f6890SSam Ravnborg #endif 81eb8f6890SSam Ravnborg 821a3fb6d4SAdrian Bunk #if defined(CONFIG_MEMORY_HOTPLUG) 83eb8f6890SSam Ravnborg #define MEM_KEEP(sec) *(.mem##sec) 84eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) 85eb8f6890SSam Ravnborg #else 86eb8f6890SSam Ravnborg #define MEM_KEEP(sec) 87eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) *(.mem##sec) 88eb8f6890SSam Ravnborg #endif 89eb8f6890SSam Ravnborg 908da3821bSSteven Rostedt #ifdef CONFIG_FTRACE_MCOUNT_RECORD 914b3b4c5eSJohn Reiser #define MCOUNT_REC() . = ALIGN(8); \ 924b3b4c5eSJohn Reiser VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 938da3821bSSteven Rostedt *(__mcount_loc) \ 948da3821bSSteven Rostedt VMLINUX_SYMBOL(__stop_mcount_loc) = .; 958da3821bSSteven Rostedt #else 968da3821bSSteven Rostedt #define MCOUNT_REC() 978da3821bSSteven Rostedt #endif 98eb8f6890SSam Ravnborg 992ed84eebSSteven Rostedt #ifdef CONFIG_TRACE_BRANCH_PROFILING 10045b79749SSteven Rostedt #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 10145b79749SSteven Rostedt *(_ftrace_annotated_branch) \ 10245b79749SSteven Rostedt VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 1031f0d69a9SSteven Rostedt #else 1041f0d69a9SSteven Rostedt #define LIKELY_PROFILE() 1051f0d69a9SSteven Rostedt #endif 1061f0d69a9SSteven Rostedt 1072bcd521aSSteven Rostedt #ifdef CONFIG_PROFILE_ALL_BRANCHES 1082bcd521aSSteven Rostedt #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 1092bcd521aSSteven Rostedt *(_ftrace_branch) \ 1102bcd521aSSteven Rostedt VMLINUX_SYMBOL(__stop_branch_profile) = .; 1112bcd521aSSteven Rostedt #else 1122bcd521aSSteven Rostedt #define BRANCH_PROFILE() 1132bcd521aSSteven Rostedt #endif 1142bcd521aSSteven Rostedt 1155f77a88bSTom Zanussi #ifdef CONFIG_EVENT_TRACING 116b77e38aaSSteven Rostedt #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 117b77e38aaSSteven Rostedt *(_ftrace_events) \ 118b77e38aaSSteven Rostedt VMLINUX_SYMBOL(__stop_ftrace_events) = .; 119b77e38aaSSteven Rostedt #else 120b77e38aaSSteven Rostedt #define FTRACE_EVENTS() 121b77e38aaSSteven Rostedt #endif 122b77e38aaSSteven Rostedt 1231ba28e02SLai Jiangshan #ifdef CONFIG_TRACING 1241ba28e02SLai Jiangshan #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 1251ba28e02SLai Jiangshan *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 1261ba28e02SLai Jiangshan VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 1271ba28e02SLai Jiangshan #else 1281ba28e02SLai Jiangshan #define TRACE_PRINTKS() 1291ba28e02SLai Jiangshan #endif 1301ba28e02SLai Jiangshan 131bed1ffcaSFrederic Weisbecker #ifdef CONFIG_FTRACE_SYSCALLS 132bed1ffcaSFrederic Weisbecker #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 133bed1ffcaSFrederic Weisbecker *(__syscalls_metadata) \ 134bed1ffcaSFrederic Weisbecker VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 135bed1ffcaSFrederic Weisbecker #else 136bed1ffcaSFrederic Weisbecker #define TRACE_SYSCALLS() 137bed1ffcaSFrederic Weisbecker #endif 138bed1ffcaSFrederic Weisbecker 139ca967258SSam Ravnborg /* .data section */ 140ca967258SSam Ravnborg #define DATA_DATA \ 1410e0d314eSSam Ravnborg *(.data) \ 142312b1485SSam Ravnborg *(.ref.data) \ 143eb8f6890SSam Ravnborg DEV_KEEP(init.data) \ 144eb8f6890SSam Ravnborg DEV_KEEP(exit.data) \ 145eb8f6890SSam Ravnborg CPU_KEEP(init.data) \ 146eb8f6890SSam Ravnborg CPU_KEEP(exit.data) \ 147eb8f6890SSam Ravnborg MEM_KEEP(init.data) \ 148eb8f6890SSam Ravnborg MEM_KEEP(exit.data) \ 1498256e47cSMathieu Desnoyers . = ALIGN(8); \ 1508256e47cSMathieu Desnoyers VMLINUX_SYMBOL(__start___markers) = .; \ 1518256e47cSMathieu Desnoyers *(__markers) \ 15297e1c18eSMathieu Desnoyers VMLINUX_SYMBOL(__stop___markers) = .; \ 1537e066fb8SMathieu Desnoyers . = ALIGN(32); \ 15497e1c18eSMathieu Desnoyers VMLINUX_SYMBOL(__start___tracepoints) = .; \ 15597e1c18eSMathieu Desnoyers *(__tracepoints) \ 1561f0d69a9SSteven Rostedt VMLINUX_SYMBOL(__stop___tracepoints) = .; \ 157e9d376f0SJason Baron /* implement dynamic printk debug */ \ 158e9d376f0SJason Baron . = ALIGN(8); \ 159e9d376f0SJason Baron VMLINUX_SYMBOL(__start___verbose) = .; \ 160e9d376f0SJason Baron *(__verbose) \ 161e9d376f0SJason Baron VMLINUX_SYMBOL(__stop___verbose) = .; \ 1622bcd521aSSteven Rostedt LIKELY_PROFILE() \ 163b77e38aaSSteven Rostedt BRANCH_PROFILE() \ 1648a20d84dSIngo Molnar TRACE_PRINTKS() \ 165bed1ffcaSFrederic Weisbecker FTRACE_EVENTS() \ 166bed1ffcaSFrederic Weisbecker TRACE_SYSCALLS() 167ca967258SSam Ravnborg 168ef53dae8SSam Ravnborg /* 169ef53dae8SSam Ravnborg * Data section helpers 170ef53dae8SSam Ravnborg */ 171ef53dae8SSam Ravnborg #define NOSAVE_DATA \ 172ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 173ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__nosave_begin) = .; \ 174ef53dae8SSam Ravnborg *(.data.nosave) \ 175ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 176ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__nosave_end) = .; 177ef53dae8SSam Ravnborg 178ef53dae8SSam Ravnborg #define PAGE_ALIGNED_DATA(page_align) \ 179ef53dae8SSam Ravnborg . = ALIGN(page_align); \ 180ef53dae8SSam Ravnborg *(.data.page_aligned) 181ef53dae8SSam Ravnborg 182ef53dae8SSam Ravnborg #define READ_MOSTLY_DATA(align) \ 183ef53dae8SSam Ravnborg . = ALIGN(align); \ 184ef53dae8SSam Ravnborg *(.data.read_mostly) 185ef53dae8SSam Ravnborg 186ef53dae8SSam Ravnborg #define CACHELINE_ALIGNED_DATA(align) \ 187ef53dae8SSam Ravnborg . = ALIGN(align); \ 188ef53dae8SSam Ravnborg *(.data.cacheline_aligned) 189ef53dae8SSam Ravnborg 19039a449d9STim Abbott #define INIT_TASK_DATA(align) \ 191ef53dae8SSam Ravnborg . = ALIGN(align); \ 192ef53dae8SSam Ravnborg *(.data.init_task) 193ef53dae8SSam Ravnborg 194ef53dae8SSam Ravnborg /* 195ef53dae8SSam Ravnborg * Read only Data 196ef53dae8SSam Ravnborg */ 197ef53dae8SSam Ravnborg #define RO_DATA_SECTION(align) \ 1984096b46fSSam Ravnborg . = ALIGN((align)); \ 1991da177e4SLinus Torvalds .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 2006569580dSVivek Goyal VMLINUX_SYMBOL(__start_rodata) = .; \ 2011da177e4SLinus Torvalds *(.rodata) *(.rodata.*) \ 2021da177e4SLinus Torvalds *(__vermagic) /* Kernel version magic */ \ 2038256e47cSMathieu Desnoyers *(__markers_strings) /* Markers: strings */ \ 20497e1c18eSMathieu Desnoyers *(__tracepoints_strings)/* Tracepoints: strings */ \ 2051da177e4SLinus Torvalds } \ 2061da177e4SLinus Torvalds \ 2071da177e4SLinus Torvalds .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 2081da177e4SLinus Torvalds *(.rodata1) \ 2091da177e4SLinus Torvalds } \ 2101da177e4SLinus Torvalds \ 2116360b1fbSJan Beulich BUG_TABLE \ 2126360b1fbSJan Beulich \ 2131da177e4SLinus Torvalds /* PCI quirks */ \ 2141da177e4SLinus Torvalds .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 2151da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 2161da177e4SLinus Torvalds *(.pci_fixup_early) \ 2171da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 2181da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 2191da177e4SLinus Torvalds *(.pci_fixup_header) \ 2201da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 2211da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 2221da177e4SLinus Torvalds *(.pci_fixup_final) \ 2231da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 2241da177e4SLinus Torvalds VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 2251da177e4SLinus Torvalds *(.pci_fixup_enable) \ 2261da177e4SLinus Torvalds VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 2271597cacbSAlan Cox VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 2281597cacbSAlan Cox *(.pci_fixup_resume) \ 2291597cacbSAlan Cox VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 230e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 231e1a2a51eSRafael J. Wysocki *(.pci_fixup_resume_early) \ 232e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 233e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 234e1a2a51eSRafael J. Wysocki *(.pci_fixup_suspend) \ 235e1a2a51eSRafael J. Wysocki VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 2361da177e4SLinus Torvalds } \ 2371da177e4SLinus Torvalds \ 2385658c769SDavid Woodhouse /* Built-in firmware blobs */ \ 2395658c769SDavid Woodhouse .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 2405658c769SDavid Woodhouse VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 2415658c769SDavid Woodhouse *(.builtin_fw) \ 2425658c769SDavid Woodhouse VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 2435658c769SDavid Woodhouse } \ 2445658c769SDavid Woodhouse \ 245394b701cSMatt Porter /* RapidIO route ops */ \ 246394b701cSMatt Porter .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \ 247394b701cSMatt Porter VMLINUX_SYMBOL(__start_rio_route_ops) = .; \ 248394b701cSMatt Porter *(.rio_route_ops) \ 249394b701cSMatt Porter VMLINUX_SYMBOL(__end_rio_route_ops) = .; \ 250394b701cSMatt Porter } \ 251394b701cSMatt Porter \ 25263687a52SJan Beulich TRACEDATA \ 25363687a52SJan Beulich \ 2541da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 2551da177e4SLinus Torvalds __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 2561da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___ksymtab) = .; \ 2571da177e4SLinus Torvalds *(__ksymtab) \ 2581da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 2591da177e4SLinus Torvalds } \ 2601da177e4SLinus Torvalds \ 2611da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 2621da177e4SLinus Torvalds __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 2631da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 2641da177e4SLinus Torvalds *(__ksymtab_gpl) \ 2651da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 2661da177e4SLinus Torvalds } \ 2671da177e4SLinus Torvalds \ 268f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 269f71d20e9SArjan van de Ven __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 270f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 271f71d20e9SArjan van de Ven *(__ksymtab_unused) \ 272f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 273f71d20e9SArjan van de Ven } \ 274f71d20e9SArjan van de Ven \ 275f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 276f71d20e9SArjan van de Ven __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 277f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 278f71d20e9SArjan van de Ven *(__ksymtab_unused_gpl) \ 279f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 280f71d20e9SArjan van de Ven } \ 281f71d20e9SArjan van de Ven \ 2829f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 2839f28bb7eSGreg Kroah-Hartman __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 2849f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 2859f28bb7eSGreg Kroah-Hartman *(__ksymtab_gpl_future) \ 2869f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 2879f28bb7eSGreg Kroah-Hartman } \ 2889f28bb7eSGreg Kroah-Hartman \ 2891da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 2901da177e4SLinus Torvalds __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 2911da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___kcrctab) = .; \ 2921da177e4SLinus Torvalds *(__kcrctab) \ 2931da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 2941da177e4SLinus Torvalds } \ 2951da177e4SLinus Torvalds \ 2961da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 2971da177e4SLinus Torvalds __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 2981da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 2991da177e4SLinus Torvalds *(__kcrctab_gpl) \ 3001da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 3011da177e4SLinus Torvalds } \ 3021da177e4SLinus Torvalds \ 303f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 304f71d20e9SArjan van de Ven __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 305f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 306f71d20e9SArjan van de Ven *(__kcrctab_unused) \ 307f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 308f71d20e9SArjan van de Ven } \ 309f71d20e9SArjan van de Ven \ 310f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 311f71d20e9SArjan van de Ven __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 312f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 313f71d20e9SArjan van de Ven *(__kcrctab_unused_gpl) \ 314f71d20e9SArjan van de Ven VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 315f71d20e9SArjan van de Ven } \ 316f71d20e9SArjan van de Ven \ 3179f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 3189f28bb7eSGreg Kroah-Hartman __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 3199f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 3209f28bb7eSGreg Kroah-Hartman *(__kcrctab_gpl_future) \ 3219f28bb7eSGreg Kroah-Hartman VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 3229f28bb7eSGreg Kroah-Hartman } \ 3239f28bb7eSGreg Kroah-Hartman \ 3241da177e4SLinus Torvalds /* Kernel symbol table: strings */ \ 3251da177e4SLinus Torvalds __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 3261da177e4SLinus Torvalds *(__ksymtab_strings) \ 3271da177e4SLinus Torvalds } \ 3281da177e4SLinus Torvalds \ 329eb8f6890SSam Ravnborg /* __*init sections */ \ 330eb8f6890SSam Ravnborg __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 331312b1485SSam Ravnborg *(.ref.rodata) \ 332eb8f6890SSam Ravnborg DEV_KEEP(init.rodata) \ 333eb8f6890SSam Ravnborg DEV_KEEP(exit.rodata) \ 334eb8f6890SSam Ravnborg CPU_KEEP(init.rodata) \ 335eb8f6890SSam Ravnborg CPU_KEEP(exit.rodata) \ 336eb8f6890SSam Ravnborg MEM_KEEP(init.rodata) \ 337eb8f6890SSam Ravnborg MEM_KEEP(exit.rodata) \ 338eb8f6890SSam Ravnborg } \ 339eb8f6890SSam Ravnborg \ 3401da177e4SLinus Torvalds /* Built-in module parameters. */ \ 3411da177e4SLinus Torvalds __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 3421da177e4SLinus Torvalds VMLINUX_SYMBOL(__start___param) = .; \ 3431da177e4SLinus Torvalds *(__param) \ 3441da177e4SLinus Torvalds VMLINUX_SYMBOL(__stop___param) = .; \ 345edeed305SArjan van de Ven . = ALIGN((align)); \ 3466569580dSVivek Goyal VMLINUX_SYMBOL(__end_rodata) = .; \ 3477583ddfdSMarcelo Tosatti } \ 3484096b46fSSam Ravnborg . = ALIGN((align)); 3494096b46fSSam Ravnborg 350ef53dae8SSam Ravnborg /* RODATA & RO_DATA provided for backward compatibility. 3514096b46fSSam Ravnborg * All archs are supposed to use RO_DATA() */ 352ef53dae8SSam Ravnborg #define RODATA RO_DATA_SECTION(4096) 353ef53dae8SSam Ravnborg #define RO_DATA(align) RO_DATA_SECTION(align) 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds #define SECURITY_INIT \ 35660bad7faSEric W. Biederman .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 3571da177e4SLinus Torvalds VMLINUX_SYMBOL(__security_initcall_start) = .; \ 3581da177e4SLinus Torvalds *(.security_initcall.init) \ 3591da177e4SLinus Torvalds VMLINUX_SYMBOL(__security_initcall_end) = .; \ 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3627664709bSSam Ravnborg /* .text section. Map to function alignment to avoid address changes 3637664709bSSam Ravnborg * during second ld run in second ld pass when generating System.map */ 3647664709bSSam Ravnborg #define TEXT_TEXT \ 3657664709bSSam Ravnborg ALIGN_FUNCTION(); \ 366fb5e2b37SJan Beulich *(.text.hot) \ 3670e0d314eSSam Ravnborg *(.text) \ 368312b1485SSam Ravnborg *(.ref.text) \ 369eb8f6890SSam Ravnborg DEV_KEEP(init.text) \ 370eb8f6890SSam Ravnborg DEV_KEEP(exit.text) \ 371eb8f6890SSam Ravnborg CPU_KEEP(init.text) \ 372eb8f6890SSam Ravnborg CPU_KEEP(exit.text) \ 373eb8f6890SSam Ravnborg MEM_KEEP(init.text) \ 374fb5e2b37SJan Beulich MEM_KEEP(exit.text) \ 375fb5e2b37SJan Beulich *(.text.unlikely) 376eb8f6890SSam Ravnborg 3777664709bSSam Ravnborg 3786d30e3a8SSam Ravnborg /* sched.text is aling to function alignment to secure we have same 3796d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 3801da177e4SLinus Torvalds #define SCHED_TEXT \ 3816d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 3821da177e4SLinus Torvalds VMLINUX_SYMBOL(__sched_text_start) = .; \ 3831da177e4SLinus Torvalds *(.sched.text) \ 3841da177e4SLinus Torvalds VMLINUX_SYMBOL(__sched_text_end) = .; 3851da177e4SLinus Torvalds 3866d30e3a8SSam Ravnborg /* spinlock.text is aling to function alignment to secure we have same 3876d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 3881da177e4SLinus Torvalds #define LOCK_TEXT \ 3896d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 3901da177e4SLinus Torvalds VMLINUX_SYMBOL(__lock_text_start) = .; \ 3911da177e4SLinus Torvalds *(.spinlock.text) \ 3921da177e4SLinus Torvalds VMLINUX_SYMBOL(__lock_text_end) = .; 393d0aaff97SPrasanna S Panchamukhi 394d0aaff97SPrasanna S Panchamukhi #define KPROBES_TEXT \ 395d0aaff97SPrasanna S Panchamukhi ALIGN_FUNCTION(); \ 396d0aaff97SPrasanna S Panchamukhi VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 397d0aaff97SPrasanna S Panchamukhi *(.kprobes.text) \ 398d0aaff97SPrasanna S Panchamukhi VMLINUX_SYMBOL(__kprobes_text_end) = .; 399a7d0c210SPaolo 'Blaisorblade' Giarrusso 400a0343e82SFrederic Weisbecker #ifdef CONFIG_FUNCTION_GRAPH_TRACER 401a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT \ 402a0343e82SFrederic Weisbecker ALIGN_FUNCTION(); \ 403a0343e82SFrederic Weisbecker VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 404a0343e82SFrederic Weisbecker *(.irqentry.text) \ 405a0343e82SFrederic Weisbecker VMLINUX_SYMBOL(__irqentry_text_end) = .; 406a0343e82SFrederic Weisbecker #else 407a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT 408a0343e82SFrederic Weisbecker #endif 409a0343e82SFrederic Weisbecker 41037c514e3SSam Ravnborg /* Section used for early init (in .S files) */ 4117923f90fSSam Ravnborg #define HEAD_TEXT *(.head.text) 41237c514e3SSam Ravnborg 4137923f90fSSam Ravnborg #define HEAD_TEXT_SECTION \ 414ef53dae8SSam Ravnborg .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 415ef53dae8SSam Ravnborg HEAD_TEXT \ 416ef53dae8SSam Ravnborg } 417ef53dae8SSam Ravnborg 418ef53dae8SSam Ravnborg /* 419ef53dae8SSam Ravnborg * Exception table 420ef53dae8SSam Ravnborg */ 421ef53dae8SSam Ravnborg #define EXCEPTION_TABLE(align) \ 422ef53dae8SSam Ravnborg . = ALIGN(align); \ 423ef53dae8SSam Ravnborg __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 424ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__start___ex_table) = .; \ 425ef53dae8SSam Ravnborg *(__ex_table) \ 426ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__stop___ex_table) = .; \ 427ef53dae8SSam Ravnborg } 428ef53dae8SSam Ravnborg 429ef53dae8SSam Ravnborg /* 430ef53dae8SSam Ravnborg * Init task 431ef53dae8SSam Ravnborg */ 43239a449d9STim Abbott #define INIT_TASK_DATA_SECTION(align) \ 433ef53dae8SSam Ravnborg . = ALIGN(align); \ 434ef53dae8SSam Ravnborg .data.init_task : { \ 43539a449d9STim Abbott INIT_TASK_DATA(align) \ 436ef53dae8SSam Ravnborg } 437eb8f6890SSam Ravnborg 438b99b87f7SPeter Oberparleiter #ifdef CONFIG_CONSTRUCTORS 4392a2325e6SHeiko Carstens #define KERNEL_CTORS() . = ALIGN(8); \ 4402a2325e6SHeiko Carstens VMLINUX_SYMBOL(__ctors_start) = .; \ 441b99b87f7SPeter Oberparleiter *(.ctors) \ 442b99b87f7SPeter Oberparleiter VMLINUX_SYMBOL(__ctors_end) = .; 443b99b87f7SPeter Oberparleiter #else 444b99b87f7SPeter Oberparleiter #define KERNEL_CTORS() 445b99b87f7SPeter Oberparleiter #endif 446b99b87f7SPeter Oberparleiter 44701ba2bdcSSam Ravnborg /* init and exit section handling */ 448eb8f6890SSam Ravnborg #define INIT_DATA \ 449eb8f6890SSam Ravnborg *(.init.data) \ 450eb8f6890SSam Ravnborg DEV_DISCARD(init.data) \ 451eb8f6890SSam Ravnborg CPU_DISCARD(init.data) \ 452eb8f6890SSam Ravnborg MEM_DISCARD(init.data) \ 453b99b87f7SPeter Oberparleiter KERNEL_CTORS() \ 454fd6c3a8dSJan Beulich *(.init.rodata) \ 4554b3b4c5eSJohn Reiser MCOUNT_REC() \ 456fd6c3a8dSJan Beulich DEV_DISCARD(init.rodata) \ 457fd6c3a8dSJan Beulich CPU_DISCARD(init.rodata) \ 458e9d376f0SJason Baron MEM_DISCARD(init.rodata) 45901ba2bdcSSam Ravnborg 460eb8f6890SSam Ravnborg #define INIT_TEXT \ 461eb8f6890SSam Ravnborg *(.init.text) \ 462eb8f6890SSam Ravnborg DEV_DISCARD(init.text) \ 463eb8f6890SSam Ravnborg CPU_DISCARD(init.text) \ 464eb8f6890SSam Ravnborg MEM_DISCARD(init.text) 465eb8f6890SSam Ravnborg 466eb8f6890SSam Ravnborg #define EXIT_DATA \ 467eb8f6890SSam Ravnborg *(.exit.data) \ 468eb8f6890SSam Ravnborg DEV_DISCARD(exit.data) \ 469eb8f6890SSam Ravnborg DEV_DISCARD(exit.rodata) \ 470eb8f6890SSam Ravnborg CPU_DISCARD(exit.data) \ 471eb8f6890SSam Ravnborg CPU_DISCARD(exit.rodata) \ 472eb8f6890SSam Ravnborg MEM_DISCARD(exit.data) \ 473eb8f6890SSam Ravnborg MEM_DISCARD(exit.rodata) 474eb8f6890SSam Ravnborg 475eb8f6890SSam Ravnborg #define EXIT_TEXT \ 476eb8f6890SSam Ravnborg *(.exit.text) \ 477eb8f6890SSam Ravnborg DEV_DISCARD(exit.text) \ 478eb8f6890SSam Ravnborg CPU_DISCARD(exit.text) \ 479eb8f6890SSam Ravnborg MEM_DISCARD(exit.text) 48001ba2bdcSSam Ravnborg 4817923f90fSSam Ravnborg #define EXIT_CALL \ 4827923f90fSSam Ravnborg *(.exitcall.exit) 4837923f90fSSam Ravnborg 484ef53dae8SSam Ravnborg /* 485ef53dae8SSam Ravnborg * bss (Block Started by Symbol) - uninitialized data 486ef53dae8SSam Ravnborg * zeroed during startup 487ef53dae8SSam Ravnborg */ 48804e448d9STim Abbott #define SBSS(sbss_align) \ 48904e448d9STim Abbott . = ALIGN(sbss_align); \ 490ef53dae8SSam Ravnborg .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 491ef53dae8SSam Ravnborg *(.sbss) \ 492ef53dae8SSam Ravnborg *(.scommon) \ 493ef53dae8SSam Ravnborg } 494ef53dae8SSam Ravnborg 495ef53dae8SSam Ravnborg #define BSS(bss_align) \ 496ef53dae8SSam Ravnborg . = ALIGN(bss_align); \ 497ef53dae8SSam Ravnborg .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 498ef53dae8SSam Ravnborg *(.bss.page_aligned) \ 499ef53dae8SSam Ravnborg *(.dynbss) \ 500ef53dae8SSam Ravnborg *(.bss) \ 501ef53dae8SSam Ravnborg *(COMMON) \ 502ef53dae8SSam Ravnborg } 503ef53dae8SSam Ravnborg 504ef53dae8SSam Ravnborg /* 505ef53dae8SSam Ravnborg * DWARF debug sections. 506ef53dae8SSam Ravnborg * Symbols in the DWARF debugging sections are relative to 507ef53dae8SSam Ravnborg * the beginning of the section so we begin them at 0. 508ef53dae8SSam Ravnborg */ 509a7d0c210SPaolo 'Blaisorblade' Giarrusso #define DWARF_DEBUG \ 510a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1 */ \ 511a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug 0 : { *(.debug) } \ 512a7d0c210SPaolo 'Blaisorblade' Giarrusso .line 0 : { *(.line) } \ 513a7d0c210SPaolo 'Blaisorblade' Giarrusso /* GNU DWARF 1 extensions */ \ 514a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 515a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_sfnames 0 : { *(.debug_sfnames) } \ 516a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1.1 and DWARF 2 */ \ 517a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_aranges 0 : { *(.debug_aranges) } \ 518a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_pubnames 0 : { *(.debug_pubnames) } \ 519a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 2 */ \ 520a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_info 0 : { *(.debug_info \ 521a7d0c210SPaolo 'Blaisorblade' Giarrusso .gnu.linkonce.wi.*) } \ 522a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_abbrev 0 : { *(.debug_abbrev) } \ 523a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_line 0 : { *(.debug_line) } \ 524a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_frame 0 : { *(.debug_frame) } \ 525a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_str 0 : { *(.debug_str) } \ 526a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_loc 0 : { *(.debug_loc) } \ 527a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_macinfo 0 : { *(.debug_macinfo) } \ 528a7d0c210SPaolo 'Blaisorblade' Giarrusso /* SGI/MIPS DWARF 2 extensions */ \ 529a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_weaknames 0 : { *(.debug_weaknames) } \ 530a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_funcnames 0 : { *(.debug_funcnames) } \ 531a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_typenames 0 : { *(.debug_typenames) } \ 532a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_varnames 0 : { *(.debug_varnames) } \ 533a7d0c210SPaolo 'Blaisorblade' Giarrusso 534a7d0c210SPaolo 'Blaisorblade' Giarrusso /* Stabs debugging sections. */ 535a7d0c210SPaolo 'Blaisorblade' Giarrusso #define STABS_DEBUG \ 536a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab 0 : { *(.stab) } \ 537a7d0c210SPaolo 'Blaisorblade' Giarrusso .stabstr 0 : { *(.stabstr) } \ 538a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.excl 0 : { *(.stab.excl) } \ 539a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.exclstr 0 : { *(.stab.exclstr) } \ 540a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.index 0 : { *(.stab.index) } \ 541a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.indexstr 0 : { *(.stab.indexstr) } \ 542a7d0c210SPaolo 'Blaisorblade' Giarrusso .comment 0 : { *(.comment) } 5439c9b8b38SJeremy Fitzhardinge 5446360b1fbSJan Beulich #ifdef CONFIG_GENERIC_BUG 5457664c5a1SJeremy Fitzhardinge #define BUG_TABLE \ 5467664c5a1SJeremy Fitzhardinge . = ALIGN(8); \ 5477664c5a1SJeremy Fitzhardinge __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 548c6de0026SYoshinori Sato VMLINUX_SYMBOL(__start___bug_table) = .; \ 5497664c5a1SJeremy Fitzhardinge *(__bug_table) \ 550c6de0026SYoshinori Sato VMLINUX_SYMBOL(__stop___bug_table) = .; \ 5517664c5a1SJeremy Fitzhardinge } 5526360b1fbSJan Beulich #else 5536360b1fbSJan Beulich #define BUG_TABLE 5546360b1fbSJan Beulich #endif 5557664c5a1SJeremy Fitzhardinge 55663687a52SJan Beulich #ifdef CONFIG_PM_TRACE 55763687a52SJan Beulich #define TRACEDATA \ 55863687a52SJan Beulich . = ALIGN(4); \ 55963687a52SJan Beulich .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 560c6de0026SYoshinori Sato VMLINUX_SYMBOL(__tracedata_start) = .; \ 56163687a52SJan Beulich *(.tracedata) \ 562c6de0026SYoshinori Sato VMLINUX_SYMBOL(__tracedata_end) = .; \ 56363687a52SJan Beulich } 56463687a52SJan Beulich #else 56563687a52SJan Beulich #define TRACEDATA 56663687a52SJan Beulich #endif 56763687a52SJan Beulich 5689c9b8b38SJeremy Fitzhardinge #define NOTES \ 569cbe87121SRoland McGrath .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 570cbe87121SRoland McGrath VMLINUX_SYMBOL(__start_notes) = .; \ 571cbe87121SRoland McGrath *(.note.*) \ 572cbe87121SRoland McGrath VMLINUX_SYMBOL(__stop_notes) = .; \ 573cbe87121SRoland McGrath } 57461ce1efeSAndrew Morton 575ef53dae8SSam Ravnborg #define INIT_SETUP(initsetup_align) \ 576ef53dae8SSam Ravnborg . = ALIGN(initsetup_align); \ 577ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__setup_start) = .; \ 578ef53dae8SSam Ravnborg *(.init.setup) \ 579ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__setup_end) = .; 580ef53dae8SSam Ravnborg 58161ce1efeSAndrew Morton #define INITCALLS \ 582c2147a50SEduard - Gabriel Munteanu *(.initcallearly.init) \ 583c6de0026SYoshinori Sato VMLINUX_SYMBOL(__early_initcall_end) = .; \ 584b3438f82SLinus Torvalds *(.initcall0.init) \ 585b3438f82SLinus Torvalds *(.initcall0s.init) \ 58661ce1efeSAndrew Morton *(.initcall1.init) \ 587735a7ffbSAndrew Morton *(.initcall1s.init) \ 58861ce1efeSAndrew Morton *(.initcall2.init) \ 589735a7ffbSAndrew Morton *(.initcall2s.init) \ 59061ce1efeSAndrew Morton *(.initcall3.init) \ 591735a7ffbSAndrew Morton *(.initcall3s.init) \ 59261ce1efeSAndrew Morton *(.initcall4.init) \ 593735a7ffbSAndrew Morton *(.initcall4s.init) \ 59461ce1efeSAndrew Morton *(.initcall5.init) \ 595735a7ffbSAndrew Morton *(.initcall5s.init) \ 5968d610dd5SLinus Torvalds *(.initcallrootfs.init) \ 59761ce1efeSAndrew Morton *(.initcall6.init) \ 598735a7ffbSAndrew Morton *(.initcall6s.init) \ 599735a7ffbSAndrew Morton *(.initcall7.init) \ 600735a7ffbSAndrew Morton *(.initcall7s.init) 60161ce1efeSAndrew Morton 602ef53dae8SSam Ravnborg #define INIT_CALLS \ 603ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initcall_start) = .; \ 604ef53dae8SSam Ravnborg INITCALLS \ 605ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initcall_end) = .; 606ef53dae8SSam Ravnborg 607ef53dae8SSam Ravnborg #define CON_INITCALL \ 608ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__con_initcall_start) = .; \ 609ef53dae8SSam Ravnborg *(.con_initcall.init) \ 610ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__con_initcall_end) = .; 611ef53dae8SSam Ravnborg 612ef53dae8SSam Ravnborg #define SECURITY_INITCALL \ 613ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__security_initcall_start) = .; \ 614ef53dae8SSam Ravnborg *(.security_initcall.init) \ 615ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__security_initcall_end) = .; 616ef53dae8SSam Ravnborg 617ef53dae8SSam Ravnborg #ifdef CONFIG_BLK_DEV_INITRD 618ef53dae8SSam Ravnborg #define INIT_RAM_FS \ 619ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 620ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initramfs_start) = .; \ 621ef53dae8SSam Ravnborg *(.init.ramfs) \ 622ef53dae8SSam Ravnborg VMLINUX_SYMBOL(__initramfs_end) = .; 623ef53dae8SSam Ravnborg #else 624eadfe219SDavid Howells #define INIT_RAM_FS 625ef53dae8SSam Ravnborg #endif 626ef53dae8SSam Ravnborg 627023bf6f1STejun Heo /* 628023bf6f1STejun Heo * Default discarded sections. 629023bf6f1STejun Heo * 630023bf6f1STejun Heo * Some archs want to discard exit text/data at runtime rather than 631023bf6f1STejun Heo * link time due to cross-section references such as alt instructions, 632023bf6f1STejun Heo * bug table, eh_frame, etc. DISCARDS must be the last of output 633023bf6f1STejun Heo * section definitions so that such archs put those in earlier section 634023bf6f1STejun Heo * definitions. 635023bf6f1STejun Heo */ 636405d967dSTejun Heo #define DISCARDS \ 637405d967dSTejun Heo /DISCARD/ : { \ 638405d967dSTejun Heo EXIT_TEXT \ 639405d967dSTejun Heo EXIT_DATA \ 640023bf6f1STejun Heo EXIT_CALL \ 641405d967dSTejun Heo *(.discard) \ 642405d967dSTejun Heo } 643405d967dSTejun Heo 6443e5d8f97STejun Heo /** 6456b7c38d5STejun Heo * PERCPU_VADDR - define output section for percpu area 6463e5d8f97STejun Heo * @vaddr: explicit base address (optional) 6473e5d8f97STejun Heo * @phdr: destination PHDR (optional) 6483e5d8f97STejun Heo * 6493e5d8f97STejun Heo * Macro which expands to output section for percpu area. If @vaddr 6503e5d8f97STejun Heo * is not blank, it specifies explicit base address and all percpu 6513e5d8f97STejun Heo * symbols will be offset from the given address. If blank, @vaddr 6523e5d8f97STejun Heo * always equals @laddr + LOAD_OFFSET. 6533e5d8f97STejun Heo * 6543e5d8f97STejun Heo * @phdr defines the output PHDR to use if not blank. Be warned that 6553e5d8f97STejun Heo * output PHDR is sticky. If @phdr is specified, the next output 6563e5d8f97STejun Heo * section in the linker script will go there too. @phdr should have 6573e5d8f97STejun Heo * a leading colon. 6583e5d8f97STejun Heo * 6593ac6cffeSTejun Heo * Note that this macros defines __per_cpu_load as an absolute symbol. 6603ac6cffeSTejun Heo * If there is no need to put the percpu section at a predetermined 6613ac6cffeSTejun Heo * address, use PERCPU(). 6623e5d8f97STejun Heo */ 6633e5d8f97STejun Heo #define PERCPU_VADDR(vaddr, phdr) \ 664dba3d36bSIngo Molnar VMLINUX_SYMBOL(__per_cpu_load) = .; \ 665dba3d36bSIngo Molnar .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 6666b7c38d5STejun Heo - LOAD_OFFSET) { \ 667c6de0026SYoshinori Sato VMLINUX_SYMBOL(__per_cpu_start) = .; \ 6680bd74fa8SBrian Gerst *(.data.percpu.first) \ 66963cc8c75SEric Dumazet *(.data.percpu.page_aligned) \ 6705fb7dc37SFenghua Yu *(.data.percpu) \ 6715fb7dc37SFenghua Yu *(.data.percpu.shared_aligned) \ 6726b7c38d5STejun Heo VMLINUX_SYMBOL(__per_cpu_end) = .; \ 6736b7c38d5STejun Heo } phdr \ 674dba3d36bSIngo Molnar . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); 6753e5d8f97STejun Heo 6763e5d8f97STejun Heo /** 6773e5d8f97STejun Heo * PERCPU - define output section for percpu area, simple version 6783e5d8f97STejun Heo * @align: required alignment 6793e5d8f97STejun Heo * 6803e5d8f97STejun Heo * Align to @align and outputs output section for percpu area. This 6813e5d8f97STejun Heo * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and 6823e5d8f97STejun Heo * __per_cpu_start will be identical. 6833ac6cffeSTejun Heo * 6843ac6cffeSTejun Heo * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except 6853ac6cffeSTejun Heo * that __per_cpu_load is defined as a relative symbol against 6863ac6cffeSTejun Heo * .data.percpu which is required for relocatable x86_32 6873ac6cffeSTejun Heo * configuration. 6883e5d8f97STejun Heo */ 6893e5d8f97STejun Heo #define PERCPU(align) \ 6903e5d8f97STejun Heo . = ALIGN(align); \ 6913ac6cffeSTejun Heo .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ 6923ac6cffeSTejun Heo VMLINUX_SYMBOL(__per_cpu_load) = .; \ 6933ac6cffeSTejun Heo VMLINUX_SYMBOL(__per_cpu_start) = .; \ 6943ac6cffeSTejun Heo *(.data.percpu.first) \ 6953ac6cffeSTejun Heo *(.data.percpu.page_aligned) \ 6963ac6cffeSTejun Heo *(.data.percpu) \ 6973ac6cffeSTejun Heo *(.data.percpu.shared_aligned) \ 6983ac6cffeSTejun Heo VMLINUX_SYMBOL(__per_cpu_end) = .; \ 6993ac6cffeSTejun Heo } 700ef53dae8SSam Ravnborg 701ef53dae8SSam Ravnborg 702ef53dae8SSam Ravnborg /* 703ef53dae8SSam Ravnborg * Definition of the high level *_SECTION macros 704ef53dae8SSam Ravnborg * They will fit only a subset of the architectures 705ef53dae8SSam Ravnborg */ 706ef53dae8SSam Ravnborg 707ef53dae8SSam Ravnborg 708ef53dae8SSam Ravnborg /* 709ef53dae8SSam Ravnborg * Writeable data. 710ef53dae8SSam Ravnborg * All sections are combined in a single .data section. 711ef53dae8SSam Ravnborg * The sections following CONSTRUCTORS are arranged so their 712ef53dae8SSam Ravnborg * typical alignment matches. 713ef53dae8SSam Ravnborg * A cacheline is typical/always less than a PAGE_SIZE so 714ef53dae8SSam Ravnborg * the sections that has this restriction (or similar) 715ef53dae8SSam Ravnborg * is located before the ones requiring PAGE_SIZE alignment. 716ef53dae8SSam Ravnborg * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 717ef53dae8SSam Ravnborg * matches the requirment of PAGE_ALIGNED_DATA. 718ef53dae8SSam Ravnborg * 7197923f90fSSam Ravnborg * use 0 as page_align if page_aligned data is not used */ 72073f1d939SPaul Mundt #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 721ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 722ef53dae8SSam Ravnborg .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 72339a449d9STim Abbott INIT_TASK_DATA(inittask) \ 7241b208622STim Abbott NOSAVE_DATA \ 7251b208622STim Abbott PAGE_ALIGNED_DATA(pagealigned) \ 726ef53dae8SSam Ravnborg CACHELINE_ALIGNED_DATA(cacheline) \ 727ef53dae8SSam Ravnborg READ_MOSTLY_DATA(cacheline) \ 728ef53dae8SSam Ravnborg DATA_DATA \ 729ef53dae8SSam Ravnborg CONSTRUCTORS \ 730ef53dae8SSam Ravnborg } 731ef53dae8SSam Ravnborg 732ef53dae8SSam Ravnborg #define INIT_TEXT_SECTION(inittext_align) \ 733ef53dae8SSam Ravnborg . = ALIGN(inittext_align); \ 734ef53dae8SSam Ravnborg .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 735ef53dae8SSam Ravnborg VMLINUX_SYMBOL(_sinittext) = .; \ 736ef53dae8SSam Ravnborg INIT_TEXT \ 737ef53dae8SSam Ravnborg VMLINUX_SYMBOL(_einittext) = .; \ 738ef53dae8SSam Ravnborg } 739ef53dae8SSam Ravnborg 740ef53dae8SSam Ravnborg #define INIT_DATA_SECTION(initsetup_align) \ 741ef53dae8SSam Ravnborg .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 742ef53dae8SSam Ravnborg INIT_DATA \ 743ef53dae8SSam Ravnborg INIT_SETUP(initsetup_align) \ 744ef53dae8SSam Ravnborg INIT_CALLS \ 745ef53dae8SSam Ravnborg CON_INITCALL \ 746ef53dae8SSam Ravnborg SECURITY_INITCALL \ 747ef53dae8SSam Ravnborg INIT_RAM_FS \ 748ef53dae8SSam Ravnborg } 749ef53dae8SSam Ravnborg 75004e448d9STim Abbott #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 75104e448d9STim Abbott . = ALIGN(sbss_align); \ 75204e448d9STim Abbott VMLINUX_SYMBOL(__bss_start) = .; \ 75304e448d9STim Abbott SBSS(sbss_align) \ 754ef53dae8SSam Ravnborg BSS(bss_align) \ 75504e448d9STim Abbott . = ALIGN(stop_align); \ 75604e448d9STim Abbott VMLINUX_SYMBOL(__bss_stop) = .; 757