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 = .; 2693240b32SKees Cook * RO_DATA(PAGE_SIZE) 27c9174047SKees Cook * RW_DATA(...) 28ef53dae8SSam Ravnborg * _edata = .; 29ef53dae8SSam Ravnborg * 30ef53dae8SSam Ravnborg * EXCEPTION_TABLE(...) 31ef53dae8SSam Ravnborg * 3204e448d9STim Abbott * BSS_SECTION(0, 0, 0) 33ef53dae8SSam Ravnborg * _end = .; 34ef53dae8SSam Ravnborg * 35ef53dae8SSam Ravnborg * STABS_DEBUG 36ef53dae8SSam Ravnborg * DWARF_DEBUG 37c604abc3SKees Cook * ELF_DETAILS 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 43562c85caSYalin Wang * // __init_begin and __init_end should be page aligned, so that we can 44562c85caSYalin Wang * // free the whole .init memory 45ef53dae8SSam Ravnborg * [_stext, _etext] is the text section 46ef53dae8SSam Ravnborg * [_sdata, _edata] is the data section 47ef53dae8SSam Ravnborg * 48ef53dae8SSam Ravnborg * Some of the included output section have their own set of constants. 49ef53dae8SSam Ravnborg * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 50ef53dae8SSam Ravnborg * [__nosave_begin, __nosave_end] for the nosave data 51ef53dae8SSam Ravnborg */ 52c80d471aSTim Abbott 531da177e4SLinus Torvalds #ifndef LOAD_OFFSET 541da177e4SLinus Torvalds #define LOAD_OFFSET 0 551da177e4SLinus Torvalds #endif 561da177e4SLinus Torvalds 57441110a5SKees Cook /* 58441110a5SKees Cook * Only some architectures want to have the .notes segment visible in 59fbe6a8e6SKees Cook * a separate PT_NOTE ELF Program Header. When this happens, it needs 60fbe6a8e6SKees Cook * to be visible in both the kernel text's PT_LOAD and the PT_NOTE 61fbe6a8e6SKees Cook * Program Headers. In this case, though, the PT_LOAD needs to be made 62fbe6a8e6SKees Cook * the default again so that all the following sections don't also end 63fbe6a8e6SKees Cook * up in the PT_NOTE Program Header. 64441110a5SKees Cook */ 65441110a5SKees Cook #ifdef EMITS_PT_NOTE 66441110a5SKees Cook #define NOTES_HEADERS :text :note 67fbe6a8e6SKees Cook #define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text 68fbe6a8e6SKees Cook #else 69fbe6a8e6SKees Cook #define NOTES_HEADERS 70fbe6a8e6SKees Cook #define NOTES_HEADERS_RESTORE 71441110a5SKees Cook #endif 72441110a5SKees Cook 73b8c2f776SKees Cook /* 74b8c2f776SKees Cook * Some architectures have non-executable read-only exception tables. 75b8c2f776SKees Cook * They can be added to the RO_DATA segment by specifying their desired 76b8c2f776SKees Cook * alignment. 77b8c2f776SKees Cook */ 78b8c2f776SKees Cook #ifdef RO_EXCEPTION_TABLE_ALIGN 79b8c2f776SKees Cook #define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) 80b8c2f776SKees Cook #else 81b8c2f776SKees Cook #define RO_EXCEPTION_TABLE 82b8c2f776SKees Cook #endif 83b8c2f776SKees Cook 846d30e3a8SSam Ravnborg /* Align . to a 8 byte boundary equals to maximum function alignment. */ 856d30e3a8SSam Ravnborg #define ALIGN_FUNCTION() . = ALIGN(8) 866d30e3a8SSam Ravnborg 8707fca0e5SSam Ravnborg /* 88cb87481eSNicholas Piggin * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which 89cb87481eSNicholas Piggin * generates .data.identifier sections, which need to be pulled in with 90cb87481eSNicholas Piggin * .data. We don't want to pull in .data..other sections, which Linux 91cb87481eSNicholas Piggin * has defined. Same for text and bss. 92266ff2a8SNicholas Piggin * 93dc5723b0SSami Tolvanen * With LTO_CLANG, the linker also splits sections by default, so we need 94dc5723b0SSami Tolvanen * these macros to combine the sections during the final link. 95dc5723b0SSami Tolvanen * 96266ff2a8SNicholas Piggin * RODATA_MAIN is not used because existing code already defines .rodata.x 97266ff2a8SNicholas Piggin * sections to be brought in with rodata. 98cb87481eSNicholas Piggin */ 99dc5723b0SSami Tolvanen #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) 100cb87481eSNicholas Piggin #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 10149387f62SAlexander Lobakin #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L* 102266ff2a8SNicholas Piggin #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 1039a427556SAlexander Lobakin #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 1049a427556SAlexander Lobakin #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral* 105266ff2a8SNicholas Piggin #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 106cb87481eSNicholas Piggin #else 107cb87481eSNicholas Piggin #define TEXT_MAIN .text 108cb87481eSNicholas Piggin #define DATA_MAIN .data 109266ff2a8SNicholas Piggin #define SDATA_MAIN .sdata 110266ff2a8SNicholas Piggin #define RODATA_MAIN .rodata 111cb87481eSNicholas Piggin #define BSS_MAIN .bss 112266ff2a8SNicholas Piggin #define SBSS_MAIN .sbss 113cb87481eSNicholas Piggin #endif 114cb87481eSNicholas Piggin 115cb87481eSNicholas Piggin /* 11685c2ce91SPeter Zijlstra * GCC 4.5 and later have a 32 bytes section alignment for structures. 11785c2ce91SPeter Zijlstra * Except GCC 4.9, that feels the need to align on 64 bytes. 11807fca0e5SSam Ravnborg */ 119aab94339SDirk Brandewie #define STRUCT_ALIGNMENT 32 120aab94339SDirk Brandewie #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 12107fca0e5SSam Ravnborg 12285c2ce91SPeter Zijlstra /* 123590d6979SSteven Rostedt (VMware) * The order of the sched class addresses are important, as they are 124590d6979SSteven Rostedt (VMware) * used to determine the order of the priority of each sched class in 125590d6979SSteven Rostedt (VMware) * relation to each other. 126590d6979SSteven Rostedt (VMware) */ 127590d6979SSteven Rostedt (VMware) #define SCHED_DATA \ 128c3a340f7SSteven Rostedt (VMware) STRUCT_ALIGN(); \ 129546a3feeSPeter Zijlstra __sched_class_highest = .; \ 130c3a340f7SSteven Rostedt (VMware) *(__stop_sched_class) \ 131546a3feeSPeter Zijlstra *(__dl_sched_class) \ 132546a3feeSPeter Zijlstra *(__rt_sched_class) \ 133546a3feeSPeter Zijlstra *(__fair_sched_class) \ 134546a3feeSPeter Zijlstra *(__idle_sched_class) \ 135546a3feeSPeter Zijlstra __sched_class_lowest = .; 136590d6979SSteven Rostedt (VMware) 137eb8f6890SSam Ravnborg /* The actual configuration determine if the init/exit sections 138eb8f6890SSam Ravnborg * are handled as text/data or they can be discarded (which 139eb8f6890SSam Ravnborg * often happens at runtime) 140eb8f6890SSam Ravnborg */ 141eb8f6890SSam Ravnborg #ifdef CONFIG_HOTPLUG_CPU 142eb8f6890SSam Ravnborg #define CPU_KEEP(sec) *(.cpu##sec) 143eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) 144eb8f6890SSam Ravnborg #else 145eb8f6890SSam Ravnborg #define CPU_KEEP(sec) 146eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) *(.cpu##sec) 147eb8f6890SSam Ravnborg #endif 148eb8f6890SSam Ravnborg 1491a3fb6d4SAdrian Bunk #if defined(CONFIG_MEMORY_HOTPLUG) 150eb8f6890SSam Ravnborg #define MEM_KEEP(sec) *(.mem##sec) 151eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) 152eb8f6890SSam Ravnborg #else 153eb8f6890SSam Ravnborg #define MEM_KEEP(sec) 154eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) *(.mem##sec) 155eb8f6890SSam Ravnborg #endif 156eb8f6890SSam Ravnborg 1579440155cSPeter Zijlstra (Intel) #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE 1589440155cSPeter Zijlstra (Intel) #define KEEP_PATCHABLE KEEP(*(__patchable_function_entries)) 1599440155cSPeter Zijlstra (Intel) #define PATCHABLE_DISCARDS 1609440155cSPeter Zijlstra (Intel) #else 1619440155cSPeter Zijlstra (Intel) #define KEEP_PATCHABLE 1629440155cSPeter Zijlstra (Intel) #define PATCHABLE_DISCARDS *(__patchable_function_entries) 1639440155cSPeter Zijlstra (Intel) #endif 1649440155cSPeter Zijlstra (Intel) 1658da3821bSSteven Rostedt #ifdef CONFIG_FTRACE_MCOUNT_RECORD 166a1326b17SMark Rutland /* 167a1326b17SMark Rutland * The ftrace call sites are logged to a section whose name depends on the 168a1326b17SMark Rutland * compiler option used. A given kernel image will only use one, AKA 169a1326b17SMark Rutland * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 170a1326b17SMark Rutland * dependencies for FTRACE_CALLSITE_SECTION's definition. 17195f1fa9eSLinus Torvalds * 17246f94692SSteven Rostedt (VMware) * Need to also make ftrace_stub_graph point to ftrace_stub 173b83b43ffSSteven Rostedt (VMware) * so that the same stub location may have different protocols 174b83b43ffSSteven Rostedt (VMware) * and not mess up with C verifiers. 17534cdd18bSSteven Rostedt (VMware) * 17634cdd18bSSteven Rostedt (VMware) * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func 17734cdd18bSSteven Rostedt (VMware) * as some archs will have a different prototype for that function 17834cdd18bSSteven Rostedt (VMware) * but ftrace_ops_list_func() will have a single prototype. 179a1326b17SMark Rutland */ 1804b3b4c5eSJohn Reiser #define MCOUNT_REC() . = ALIGN(8); \ 181a6214385SMasahiro Yamada __start_mcount_loc = .; \ 182266ff2a8SNicholas Piggin KEEP(*(__mcount_loc)) \ 1839440155cSPeter Zijlstra (Intel) KEEP_PATCHABLE \ 184b83b43ffSSteven Rostedt (VMware) __stop_mcount_loc = .; \ 18534cdd18bSSteven Rostedt (VMware) ftrace_stub_graph = ftrace_stub; \ 18634cdd18bSSteven Rostedt (VMware) ftrace_ops_list_func = arch_ftrace_ops_list_func; 1878da3821bSSteven Rostedt #else 188b83b43ffSSteven Rostedt (VMware) # ifdef CONFIG_FUNCTION_TRACER 18934cdd18bSSteven Rostedt (VMware) # define MCOUNT_REC() ftrace_stub_graph = ftrace_stub; \ 19034cdd18bSSteven Rostedt (VMware) ftrace_ops_list_func = arch_ftrace_ops_list_func; 1918da3821bSSteven Rostedt # else 1928da3821bSSteven Rostedt # define MCOUNT_REC() 1938da3821bSSteven Rostedt # endif 194b83b43ffSSteven Rostedt (VMware) #endif 195eb8f6890SSam Ravnborg 196*9b351be2SJim Cromie #define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _s_, _e_) \ 197*9b351be2SJim Cromie _s_##_label_ = .; \ 198*9b351be2SJim Cromie KEEP(*(_sec_)) \ 199*9b351be2SJim Cromie _e_##_label_ = .; 200*9b351be2SJim Cromie 201*9b351be2SJim Cromie #define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _s_, _e_) \ 202*9b351be2SJim Cromie _label_##_s_ = .; \ 203*9b351be2SJim Cromie KEEP(*(_sec_)) \ 204*9b351be2SJim Cromie _label_##_e_ = .; 205*9b351be2SJim Cromie 206*9b351be2SJim Cromie #define BOUNDED_SECTION_BY(_sec_, _label_) \ 207*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 208*9b351be2SJim Cromie 209*9b351be2SJim Cromie #define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec) 210*9b351be2SJim Cromie 2112ed84eebSSteven Rostedt #ifdef CONFIG_TRACE_BRANCH_PROFILING 212*9b351be2SJim Cromie #define LIKELY_PROFILE() \ 213*9b351be2SJim Cromie BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile) 2141f0d69a9SSteven Rostedt #else 2151f0d69a9SSteven Rostedt #define LIKELY_PROFILE() 2161f0d69a9SSteven Rostedt #endif 2171f0d69a9SSteven Rostedt 2182bcd521aSSteven Rostedt #ifdef CONFIG_PROFILE_ALL_BRANCHES 219*9b351be2SJim Cromie #define BRANCH_PROFILE() \ 220*9b351be2SJim Cromie BOUNDED_SECTION_BY(_ftrace_branch, _branch_profile) 2212bcd521aSSteven Rostedt #else 2222bcd521aSSteven Rostedt #define BRANCH_PROFILE() 2232bcd521aSSteven Rostedt #endif 2242bcd521aSSteven Rostedt 225376e2424SMasami Hiramatsu #ifdef CONFIG_KPROBES 226*9b351be2SJim Cromie #define KPROBE_BLACKLIST() \ 227*9b351be2SJim Cromie . = ALIGN(8); \ 228*9b351be2SJim Cromie BOUNDED_SECTION(_kprobe_blacklist) 229376e2424SMasami Hiramatsu #else 230376e2424SMasami Hiramatsu #define KPROBE_BLACKLIST() 231376e2424SMasami Hiramatsu #endif 232376e2424SMasami Hiramatsu 233540adea3SMasami Hiramatsu #ifdef CONFIG_FUNCTION_ERROR_INJECTION 234*9b351be2SJim Cromie #define ERROR_INJECT_WHITELIST() \ 235*9b351be2SJim Cromie STRUCT_ALIGN(); \ 236*9b351be2SJim Cromie BOUNDED_SECTION(_error_injection_whitelist) 23792ace999SJosef Bacik #else 238540adea3SMasami Hiramatsu #define ERROR_INJECT_WHITELIST() 23992ace999SJosef Bacik #endif 24092ace999SJosef Bacik 2415f77a88bSTom Zanussi #ifdef CONFIG_EVENT_TRACING 242*9b351be2SJim Cromie #define FTRACE_EVENTS() \ 243*9b351be2SJim Cromie . = ALIGN(8); \ 244*9b351be2SJim Cromie BOUNDED_SECTION(_ftrace_events) \ 245*9b351be2SJim Cromie BOUNDED_SECTION_BY(_ftrace_eval_map, _ftrace_eval_maps) 246b77e38aaSSteven Rostedt #else 247b77e38aaSSteven Rostedt #define FTRACE_EVENTS() 248b77e38aaSSteven Rostedt #endif 249b77e38aaSSteven Rostedt 2501ba28e02SLai Jiangshan #ifdef CONFIG_TRACING 251*9b351be2SJim Cromie #define TRACE_PRINTKS() BOUNDED_SECTION_BY(__trace_printk_fmt, ___trace_bprintk_fmt) 252*9b351be2SJim Cromie #define TRACEPOINT_STR() BOUNDED_SECTION_BY(__tracepoint_str, ___tracepoint_str) 2531ba28e02SLai Jiangshan #else 2541ba28e02SLai Jiangshan #define TRACE_PRINTKS() 255102c9323SSteven Rostedt (Red Hat) #define TRACEPOINT_STR() 2561ba28e02SLai Jiangshan #endif 2571ba28e02SLai Jiangshan 258bed1ffcaSFrederic Weisbecker #ifdef CONFIG_FTRACE_SYSCALLS 259*9b351be2SJim Cromie #define TRACE_SYSCALLS() \ 260*9b351be2SJim Cromie . = ALIGN(8); \ 261*9b351be2SJim Cromie BOUNDED_SECTION_BY(__syscalls_metadata, _syscalls_metadata) 262bed1ffcaSFrederic Weisbecker #else 263bed1ffcaSFrederic Weisbecker #define TRACE_SYSCALLS() 264bed1ffcaSFrederic Weisbecker #endif 265bed1ffcaSFrederic Weisbecker 266c4f6699dSAlexei Starovoitov #ifdef CONFIG_BPF_EVENTS 267c4f6699dSAlexei Starovoitov #define BPF_RAW_TP() STRUCT_ALIGN(); \ 268*9b351be2SJim Cromie BOUNDED_SECTION_BY(__bpf_raw_tp_map, __bpf_raw_tp) 269c4f6699dSAlexei Starovoitov #else 270c4f6699dSAlexei Starovoitov #define BPF_RAW_TP() 271c4f6699dSAlexei Starovoitov #endif 272c4f6699dSAlexei Starovoitov 273470ca0deSPeter Hurley #ifdef CONFIG_SERIAL_EARLYCON 274*9b351be2SJim Cromie #define EARLYCON_TABLE() \ 275*9b351be2SJim Cromie . = ALIGN(8); \ 276*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(__earlycon_table, __earlycon_table, , _end) 277470ca0deSPeter Hurley #else 278470ca0deSPeter Hurley #define EARLYCON_TABLE() 279470ca0deSPeter Hurley #endif 280aab94339SDirk Brandewie 2813ac946d1SKees Cook #ifdef CONFIG_SECURITY 282*9b351be2SJim Cromie #define LSM_TABLE() \ 283*9b351be2SJim Cromie . = ALIGN(8); \ 284*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.lsm_info.init, _lsm_info, __start, __end) 285*9b351be2SJim Cromie 286*9b351be2SJim Cromie #define EARLY_LSM_TABLE() \ 287*9b351be2SJim Cromie . = ALIGN(8); \ 288*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.early_lsm_info.init, _early_lsm_info, __start, __end) 2893ac946d1SKees Cook #else 2903ac946d1SKees Cook #define LSM_TABLE() 291e6b1db98SMatthew Garrett #define EARLY_LSM_TABLE() 2923ac946d1SKees Cook #endif 2933ac946d1SKees Cook 29406309288SRob Herring #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 29506309288SRob Herring #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 2965ee02af1SMasahiro Yamada #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 29706309288SRob Herring #define _OF_TABLE_0(name) 29806309288SRob Herring #define _OF_TABLE_1(name) \ 299f6e916b8SThomas Petazzoni . = ALIGN(8); \ 300a6214385SMasahiro Yamada __##name##_of_table = .; \ 3014b89b7f7SNicholas Piggin KEEP(*(__##name##_of_table)) \ 3024b89b7f7SNicholas Piggin KEEP(*(__##name##_of_table_end)) 303aab94339SDirk Brandewie 304bb0eb050SDaniel Lezcano #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 30506309288SRob Herring #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 30606309288SRob Herring #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 30706309288SRob Herring #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 30806309288SRob Herring #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 309449e056cSDaniel Lezcano #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 3106c3ff8b1SStephen Boyd 311e647b532SMarc Zyngier #ifdef CONFIG_ACPI 312e647b532SMarc Zyngier #define ACPI_PROBE_TABLE(name) \ 313e647b532SMarc Zyngier . = ALIGN(8); \ 314*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(__##name##_acpi_probe_table, \ 315*9b351be2SJim Cromie __##name##_acpi_probe_table,, _end) 316e647b532SMarc Zyngier #else 317e647b532SMarc Zyngier #define ACPI_PROBE_TABLE(name) 318e647b532SMarc Zyngier #endif 319e647b532SMarc Zyngier 320980af75eSDaniel Lezcano #ifdef CONFIG_THERMAL 321980af75eSDaniel Lezcano #define THERMAL_TABLE(name) \ 322980af75eSDaniel Lezcano . = ALIGN(8); \ 323*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(__##name##_thermal_table, \ 324*9b351be2SJim Cromie __##name##_thermal_table,, _end) 325980af75eSDaniel Lezcano #else 326980af75eSDaniel Lezcano #define THERMAL_TABLE(name) 327980af75eSDaniel Lezcano #endif 328980af75eSDaniel Lezcano 329aab94339SDirk Brandewie #define KERNEL_DTB() \ 330aab94339SDirk Brandewie STRUCT_ALIGN(); \ 331a6214385SMasahiro Yamada __dtb_start = .; \ 3324b89b7f7SNicholas Piggin KEEP(*(.dtb.init.rodata)) \ 333a6214385SMasahiro Yamada __dtb_end = .; 334aab94339SDirk Brandewie 335b67067f1SNicholas Piggin /* 336b67067f1SNicholas Piggin * .data section 337b67067f1SNicholas Piggin */ 338ca967258SSam Ravnborg #define DATA_DATA \ 339129f6c48SArnd Bergmann *(.xiptext) \ 340cb87481eSNicholas Piggin *(DATA_MAIN) \ 341312b1485SSam Ravnborg *(.ref.data) \ 342d356c0b6SMike Frysinger *(.data..shared_aligned) /* percpu related */ \ 343266ff2a8SNicholas Piggin MEM_KEEP(init.data*) \ 344266ff2a8SNicholas Piggin MEM_KEEP(exit.data*) \ 3457ccaba53SJan Beulich *(.data.unlikely) \ 346a6214385SMasahiro Yamada __start_once = .; \ 347b1fca27dSAndi Kleen *(.data.once) \ 348a6214385SMasahiro Yamada __end_once = .; \ 34965498646SMathieu Desnoyers STRUCT_ALIGN(); \ 35097e1c18eSMathieu Desnoyers *(__tracepoints) \ 351e9d376f0SJason Baron /* implement dynamic printk debug */ \ 352e9d376f0SJason Baron . = ALIGN(8); \ 353*9b351be2SJim Cromie BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes) \ 354*9b351be2SJim Cromie BOUNDED_SECTION_BY(__dyndbg, ___dyndbg) \ 3552bcd521aSSteven Rostedt LIKELY_PROFILE() \ 356b77e38aaSSteven Rostedt BRANCH_PROFILE() \ 357102c9323SSteven Rostedt (Red Hat) TRACE_PRINTKS() \ 358c4f6699dSAlexei Starovoitov BPF_RAW_TP() \ 359102c9323SSteven Rostedt (Red Hat) TRACEPOINT_STR() 360ca967258SSam Ravnborg 361ef53dae8SSam Ravnborg /* 362ef53dae8SSam Ravnborg * Data section helpers 363ef53dae8SSam Ravnborg */ 364ef53dae8SSam Ravnborg #define NOSAVE_DATA \ 365ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 366a6214385SMasahiro Yamada __nosave_begin = .; \ 36707b3bb1eSDenys Vlasenko *(.data..nosave) \ 368ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 369a6214385SMasahiro Yamada __nosave_end = .; 370ef53dae8SSam Ravnborg 371ef53dae8SSam Ravnborg #define PAGE_ALIGNED_DATA(page_align) \ 372ef53dae8SSam Ravnborg . = ALIGN(page_align); \ 373de2b41beSJoerg Roedel *(.data..page_aligned) \ 374de2b41beSJoerg Roedel . = ALIGN(page_align); 375ef53dae8SSam Ravnborg 376ef53dae8SSam Ravnborg #define READ_MOSTLY_DATA(align) \ 377ef53dae8SSam Ravnborg . = ALIGN(align); \ 3788369744fSShaohua Li *(.data..read_mostly) \ 3798369744fSShaohua Li . = ALIGN(align); 380ef53dae8SSam Ravnborg 381ef53dae8SSam Ravnborg #define CACHELINE_ALIGNED_DATA(align) \ 382ef53dae8SSam Ravnborg . = ALIGN(align); \ 3834af57b78STim Abbott *(.data..cacheline_aligned) 384ef53dae8SSam Ravnborg 38539a449d9STim Abbott #define INIT_TASK_DATA(align) \ 386ef53dae8SSam Ravnborg . = ALIGN(align); \ 387a6214385SMasahiro Yamada __start_init_task = .; \ 388a6214385SMasahiro Yamada init_thread_union = .; \ 389a6214385SMasahiro Yamada init_stack = .; \ 390266ff2a8SNicholas Piggin KEEP(*(.data..init_task)) \ 391266ff2a8SNicholas Piggin KEEP(*(.data..init_thread_info)) \ 392a6214385SMasahiro Yamada . = __start_init_task + THREAD_SIZE; \ 393a6214385SMasahiro Yamada __end_init_task = .; 394ef53dae8SSam Ravnborg 395e872267bSArd Biesheuvel #define JUMP_TABLE_DATA \ 396e872267bSArd Biesheuvel . = ALIGN(8); \ 397*9b351be2SJim Cromie BOUNDED_SECTION_BY(__jump_table, ___jump_table) 398e872267bSArd Biesheuvel 399b44544feSPeter Zijlstra #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 4009183c3f9SJosh Poimboeuf #define STATIC_CALL_DATA \ 4019183c3f9SJosh Poimboeuf . = ALIGN(8); \ 402*9b351be2SJim Cromie BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites) \ 403*9b351be2SJim Cromie BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key) 404b44544feSPeter Zijlstra #else 405b44544feSPeter Zijlstra #define STATIC_CALL_DATA 406b44544feSPeter Zijlstra #endif 4079183c3f9SJosh Poimboeuf 408ef53dae8SSam Ravnborg /* 40932fb2fc5SHeiko Carstens * Allow architectures to handle ro_after_init data on their 41032fb2fc5SHeiko Carstens * own by defining an empty RO_AFTER_INIT_DATA. 41132fb2fc5SHeiko Carstens */ 41232fb2fc5SHeiko Carstens #ifndef RO_AFTER_INIT_DATA 413d7c19b06SJakub Kicinski #define RO_AFTER_INIT_DATA \ 4147f897acbSRomain Naour . = ALIGN(8); \ 415a6214385SMasahiro Yamada __start_ro_after_init = .; \ 416d7c19b06SJakub Kicinski *(.data..ro_after_init) \ 417e872267bSArd Biesheuvel JUMP_TABLE_DATA \ 4189183c3f9SJosh Poimboeuf STATIC_CALL_DATA \ 419a6214385SMasahiro Yamada __end_ro_after_init = .; 42032fb2fc5SHeiko Carstens #endif 42132fb2fc5SHeiko Carstens 42232fb2fc5SHeiko Carstens /* 42389245600SSami Tolvanen * .kcfi_traps contains a list KCFI trap locations. 42489245600SSami Tolvanen */ 42589245600SSami Tolvanen #ifndef KCFI_TRAPS 42689245600SSami Tolvanen #ifdef CONFIG_ARCH_USES_CFI_TRAPS 42789245600SSami Tolvanen #define KCFI_TRAPS \ 42889245600SSami Tolvanen __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) { \ 429*9b351be2SJim Cromie BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps) \ 43089245600SSami Tolvanen } 43189245600SSami Tolvanen #else 43289245600SSami Tolvanen #define KCFI_TRAPS 43389245600SSami Tolvanen #endif 43489245600SSami Tolvanen #endif 43589245600SSami Tolvanen 43689245600SSami Tolvanen /* 437ef53dae8SSam Ravnborg * Read only Data 438ef53dae8SSam Ravnborg */ 43993240b32SKees Cook #define RO_DATA(align) \ 4404096b46fSSam Ravnborg . = ALIGN((align)); \ 4411da177e4SLinus Torvalds .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 442a6214385SMasahiro Yamada __start_rodata = .; \ 4431da177e4SLinus Torvalds *(.rodata) *(.rodata.*) \ 444590d6979SSteven Rostedt (VMware) SCHED_DATA \ 44532fb2fc5SHeiko Carstens RO_AFTER_INIT_DATA /* Read only after init */ \ 44665498646SMathieu Desnoyers . = ALIGN(8); \ 447*9b351be2SJim Cromie BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \ 44897e1c18eSMathieu Desnoyers *(__tracepoints_strings)/* Tracepoints: strings */ \ 4491da177e4SLinus Torvalds } \ 4501da177e4SLinus Torvalds \ 4511da177e4SLinus Torvalds .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 4521da177e4SLinus Torvalds *(.rodata1) \ 4531da177e4SLinus Torvalds } \ 4541da177e4SLinus Torvalds \ 4551da177e4SLinus Torvalds /* PCI quirks */ \ 4561da177e4SLinus Torvalds .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 457*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early, _pci_fixups_early, __start, __end) \ 458*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \ 459*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final, _pci_fixups_final, __start, __end) \ 460*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \ 461*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \ 462*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \ 463*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \ 464*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \ 4651da177e4SLinus Torvalds } \ 4661da177e4SLinus Torvalds \ 467771856caSLuis Chamberlain FW_LOADER_BUILT_IN_DATA \ 46863687a52SJan Beulich TRACEDATA \ 46963687a52SJan Beulich \ 47033701557SChris Down PRINTK_INDEX \ 47133701557SChris Down \ 4721da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 4731da177e4SLinus Torvalds __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 474a6214385SMasahiro Yamada __start___ksymtab = .; \ 475b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab+*))) \ 476a6214385SMasahiro Yamada __stop___ksymtab = .; \ 4771da177e4SLinus Torvalds } \ 4781da177e4SLinus Torvalds \ 4791da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 4801da177e4SLinus Torvalds __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 481a6214385SMasahiro Yamada __start___ksymtab_gpl = .; \ 482b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab_gpl+*))) \ 483a6214385SMasahiro Yamada __stop___ksymtab_gpl = .; \ 4841da177e4SLinus Torvalds } \ 4851da177e4SLinus Torvalds \ 4861da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 4871da177e4SLinus Torvalds __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 488a6214385SMasahiro Yamada __start___kcrctab = .; \ 489b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab+*))) \ 490a6214385SMasahiro Yamada __stop___kcrctab = .; \ 4911da177e4SLinus Torvalds } \ 4921da177e4SLinus Torvalds \ 4931da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 4941da177e4SLinus Torvalds __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 495a6214385SMasahiro Yamada __start___kcrctab_gpl = .; \ 496b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab_gpl+*))) \ 497a6214385SMasahiro Yamada __stop___kcrctab_gpl = .; \ 4981da177e4SLinus Torvalds } \ 4991da177e4SLinus Torvalds \ 5001da177e4SLinus Torvalds /* Kernel symbol table: strings */ \ 5011da177e4SLinus Torvalds __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 5024b89b7f7SNicholas Piggin *(__ksymtab_strings) \ 5031da177e4SLinus Torvalds } \ 5041da177e4SLinus Torvalds \ 505eb8f6890SSam Ravnborg /* __*init sections */ \ 506eb8f6890SSam Ravnborg __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 507312b1485SSam Ravnborg *(.ref.rodata) \ 508eb8f6890SSam Ravnborg MEM_KEEP(init.rodata) \ 509eb8f6890SSam Ravnborg MEM_KEEP(exit.rodata) \ 510eb8f6890SSam Ravnborg } \ 511eb8f6890SSam Ravnborg \ 5121da177e4SLinus Torvalds /* Built-in module parameters. */ \ 5131da177e4SLinus Torvalds __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 514*9b351be2SJim Cromie BOUNDED_SECTION_BY(__param, ___param) \ 515e94965edSDmitry Torokhov } \ 516e94965edSDmitry Torokhov \ 517e94965edSDmitry Torokhov /* Built-in module versions. */ \ 518e94965edSDmitry Torokhov __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 519*9b351be2SJim Cromie BOUNDED_SECTION_BY(__modver, ___modver) \ 5207583ddfdSMarcelo Tosatti } \ 521eaf93707SKees Cook \ 52289245600SSami Tolvanen KCFI_TRAPS \ 52389245600SSami Tolvanen \ 524b8c2f776SKees Cook RO_EXCEPTION_TABLE \ 525eaf93707SKees Cook NOTES \ 52690ceddcbSFangrui Song BTF \ 527eaf93707SKees Cook \ 528eaf93707SKees Cook . = ALIGN((align)); \ 529eaf93707SKees Cook __end_rodata = .; 5301da177e4SLinus Torvalds 531cf68fffbSSami Tolvanen 532cf68fffbSSami Tolvanen /* 53365538966SThomas Gleixner * Non-instrumentable text section 53465538966SThomas Gleixner */ 53565538966SThomas Gleixner #define NOINSTR_TEXT \ 53665538966SThomas Gleixner ALIGN_FUNCTION(); \ 53765538966SThomas Gleixner __noinstr_text_start = .; \ 53865538966SThomas Gleixner *(.noinstr.text) \ 53965538966SThomas Gleixner __noinstr_text_end = .; 54065538966SThomas Gleixner 54165538966SThomas Gleixner /* 542cb87481eSNicholas Piggin * .text section. Map to function alignment to avoid address changes 5430f4c4af0SNicholas Piggin * during second ld run in second ld pass when generating System.map 544cb87481eSNicholas Piggin * 545cb87481eSNicholas Piggin * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead 546cb87481eSNicholas Piggin * code elimination is enabled, so these sections should be converted 547cb87481eSNicholas Piggin * to use ".." first. 548cb87481eSNicholas Piggin */ 5497664709bSSam Ravnborg #define TEXT_TEXT \ 5507664709bSSam Ravnborg ALIGN_FUNCTION(); \ 551eff8728fSNick Desaulniers *(.text.hot .text.hot.*) \ 552eff8728fSNick Desaulniers *(TEXT_MAIN .text.fixup) \ 553eff8728fSNick Desaulniers *(.text.unlikely .text.unlikely.*) \ 554eff8728fSNick Desaulniers *(.text.unknown .text.unknown.*) \ 55565538966SThomas Gleixner NOINSTR_TEXT \ 556564c9cc8SKees Cook *(.text..refcount) \ 557312b1485SSam Ravnborg *(.ref.text) \ 55884837881SNathan Chancellor *(.text.asan.* .text.tsan.*) \ 559266ff2a8SNicholas Piggin MEM_KEEP(init.text*) \ 560266ff2a8SNicholas Piggin MEM_KEEP(exit.text*) \ 561eb8f6890SSam Ravnborg 5627664709bSSam Ravnborg 5636d30e3a8SSam Ravnborg /* sched.text is aling to function alignment to secure we have same 5646d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 5651da177e4SLinus Torvalds #define SCHED_TEXT \ 5666d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 567a6214385SMasahiro Yamada __sched_text_start = .; \ 5681da177e4SLinus Torvalds *(.sched.text) \ 569a6214385SMasahiro Yamada __sched_text_end = .; 5701da177e4SLinus Torvalds 5716d30e3a8SSam Ravnborg /* spinlock.text is aling to function alignment to secure we have same 5726d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 5731da177e4SLinus Torvalds #define LOCK_TEXT \ 5746d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 575a6214385SMasahiro Yamada __lock_text_start = .; \ 5761da177e4SLinus Torvalds *(.spinlock.text) \ 577a6214385SMasahiro Yamada __lock_text_end = .; 578d0aaff97SPrasanna S Panchamukhi 5796727ad9eSChris Metcalf #define CPUIDLE_TEXT \ 5806727ad9eSChris Metcalf ALIGN_FUNCTION(); \ 581a6214385SMasahiro Yamada __cpuidle_text_start = .; \ 5826727ad9eSChris Metcalf *(.cpuidle.text) \ 583a6214385SMasahiro Yamada __cpuidle_text_end = .; 5846727ad9eSChris Metcalf 585d0aaff97SPrasanna S Panchamukhi #define KPROBES_TEXT \ 586d0aaff97SPrasanna S Panchamukhi ALIGN_FUNCTION(); \ 587a6214385SMasahiro Yamada __kprobes_text_start = .; \ 588d0aaff97SPrasanna S Panchamukhi *(.kprobes.text) \ 589a6214385SMasahiro Yamada __kprobes_text_end = .; 590a7d0c210SPaolo 'Blaisorblade' Giarrusso 591ea714547SJiri Olsa #define ENTRY_TEXT \ 592ea714547SJiri Olsa ALIGN_FUNCTION(); \ 593a6214385SMasahiro Yamada __entry_text_start = .; \ 594ea714547SJiri Olsa *(.entry.text) \ 595a6214385SMasahiro Yamada __entry_text_end = .; 596ea714547SJiri Olsa 597a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT \ 598a0343e82SFrederic Weisbecker ALIGN_FUNCTION(); \ 599a6214385SMasahiro Yamada __irqentry_text_start = .; \ 600a0343e82SFrederic Weisbecker *(.irqentry.text) \ 601a6214385SMasahiro Yamada __irqentry_text_end = .; 602a0343e82SFrederic Weisbecker 603be7635e7SAlexander Potapenko #define SOFTIRQENTRY_TEXT \ 604be7635e7SAlexander Potapenko ALIGN_FUNCTION(); \ 605a6214385SMasahiro Yamada __softirqentry_text_start = .; \ 606be7635e7SAlexander Potapenko *(.softirqentry.text) \ 607a6214385SMasahiro Yamada __softirqentry_text_end = .; 608be7635e7SAlexander Potapenko 6091e7e4788SJosh Poimboeuf #define STATIC_CALL_TEXT \ 6101e7e4788SJosh Poimboeuf ALIGN_FUNCTION(); \ 6111e7e4788SJosh Poimboeuf __static_call_text_start = .; \ 6121e7e4788SJosh Poimboeuf *(.static_call.text) \ 6131e7e4788SJosh Poimboeuf __static_call_text_end = .; 6141e7e4788SJosh Poimboeuf 61537c514e3SSam Ravnborg /* Section used for early init (in .S files) */ 616266ff2a8SNicholas Piggin #define HEAD_TEXT KEEP(*(.head.text)) 61737c514e3SSam Ravnborg 6187923f90fSSam Ravnborg #define HEAD_TEXT_SECTION \ 619ef53dae8SSam Ravnborg .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 620ef53dae8SSam Ravnborg HEAD_TEXT \ 621ef53dae8SSam Ravnborg } 622ef53dae8SSam Ravnborg 623ef53dae8SSam Ravnborg /* 624ef53dae8SSam Ravnborg * Exception table 625ef53dae8SSam Ravnborg */ 626ef53dae8SSam Ravnborg #define EXCEPTION_TABLE(align) \ 627ef53dae8SSam Ravnborg . = ALIGN(align); \ 628ef53dae8SSam Ravnborg __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 629*9b351be2SJim Cromie BOUNDED_SECTION_BY(__ex_table, ___ex_table) \ 630ef53dae8SSam Ravnborg } 631ef53dae8SSam Ravnborg 632ef53dae8SSam Ravnborg /* 63390ceddcbSFangrui Song * .BTF 63490ceddcbSFangrui Song */ 63590ceddcbSFangrui Song #ifdef CONFIG_DEBUG_INFO_BTF 63690ceddcbSFangrui Song #define BTF \ 63790ceddcbSFangrui Song .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 638*9b351be2SJim Cromie BOUNDED_SECTION_BY(.BTF, _BTF) \ 6395a2798abSJiri Olsa } \ 6405a2798abSJiri Olsa . = ALIGN(4); \ 6415a2798abSJiri Olsa .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 6425a2798abSJiri Olsa *(.BTF_ids) \ 64390ceddcbSFangrui Song } 64490ceddcbSFangrui Song #else 64590ceddcbSFangrui Song #define BTF 64690ceddcbSFangrui Song #endif 64790ceddcbSFangrui Song 64890ceddcbSFangrui Song /* 649ef53dae8SSam Ravnborg * Init task 650ef53dae8SSam Ravnborg */ 65139a449d9STim Abbott #define INIT_TASK_DATA_SECTION(align) \ 652ef53dae8SSam Ravnborg . = ALIGN(align); \ 653da5e37efSSam Ravnborg .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 65439a449d9STim Abbott INIT_TASK_DATA(align) \ 655ef53dae8SSam Ravnborg } 656eb8f6890SSam Ravnborg 657b99b87f7SPeter Oberparleiter #ifdef CONFIG_CONSTRUCTORS 6582a2325e6SHeiko Carstens #define KERNEL_CTORS() . = ALIGN(8); \ 659a6214385SMasahiro Yamada __ctors_start = .; \ 6603e663148SKees Cook KEEP(*(SORT(.ctors.*))) \ 6614b89b7f7SNicholas Piggin KEEP(*(.ctors)) \ 6624b89b7f7SNicholas Piggin KEEP(*(SORT(.init_array.*))) \ 6634b89b7f7SNicholas Piggin KEEP(*(.init_array)) \ 664a6214385SMasahiro Yamada __ctors_end = .; 665b99b87f7SPeter Oberparleiter #else 666b99b87f7SPeter Oberparleiter #define KERNEL_CTORS() 667b99b87f7SPeter Oberparleiter #endif 668b99b87f7SPeter Oberparleiter 66901ba2bdcSSam Ravnborg /* init and exit section handling */ 670eb8f6890SSam Ravnborg #define INIT_DATA \ 671b67067f1SNicholas Piggin KEEP(*(SORT(___kentry+*))) \ 672266ff2a8SNicholas Piggin *(.init.data init.data.*) \ 673266ff2a8SNicholas Piggin MEM_DISCARD(init.data*) \ 674b99b87f7SPeter Oberparleiter KERNEL_CTORS() \ 6754b3b4c5eSJohn Reiser MCOUNT_REC() \ 676266ff2a8SNicholas Piggin *(.init.rodata .init.rodata.*) \ 677e4a9ea5eSSteven Rostedt FTRACE_EVENTS() \ 6783d56e331SSteven Rostedt TRACE_SYSCALLS() \ 679376e2424SMasami Hiramatsu KPROBE_BLACKLIST() \ 680540adea3SMasami Hiramatsu ERROR_INJECT_WHITELIST() \ 681aab94339SDirk Brandewie MEM_DISCARD(init.rodata) \ 682f2f6c255SPrashant Gaikwad CLK_OF_TABLES() \ 683f618c470SMarek Szyprowski RESERVEDMEM_OF_TABLES() \ 6842fcc112aSDaniel Lezcano TIMER_OF_TABLES() \ 6856c3ff8b1SStephen Boyd CPU_METHOD_OF_TABLES() \ 686449e056cSDaniel Lezcano CPUIDLE_METHOD_OF_TABLES() \ 687f6e916b8SThomas Petazzoni KERNEL_DTB() \ 688b0b6abd3SRob Herring IRQCHIP_OF_MATCH_TABLE() \ 68946e589a3SMarc Zyngier ACPI_PROBE_TABLE(irqchip) \ 6902fcc112aSDaniel Lezcano ACPI_PROBE_TABLE(timer) \ 691980af75eSDaniel Lezcano THERMAL_TABLE(governor) \ 6923ac946d1SKees Cook EARLYCON_TABLE() \ 693e6b1db98SMatthew Garrett LSM_TABLE() \ 69490a025a8SBrendan Higgins EARLY_LSM_TABLE() \ 69590a025a8SBrendan Higgins KUNIT_TABLE() 69601ba2bdcSSam Ravnborg 697eb8f6890SSam Ravnborg #define INIT_TEXT \ 698266ff2a8SNicholas Piggin *(.init.text .init.text.*) \ 699e41f501dSDmitry Vyukov *(.text.startup) \ 700266ff2a8SNicholas Piggin MEM_DISCARD(init.text*) 701eb8f6890SSam Ravnborg 702eb8f6890SSam Ravnborg #define EXIT_DATA \ 703266ff2a8SNicholas Piggin *(.exit.data .exit.data.*) \ 7048dcf86caSPeter Oberparleiter *(.fini_array .fini_array.*) \ 7058dcf86caSPeter Oberparleiter *(.dtors .dtors.*) \ 706266ff2a8SNicholas Piggin MEM_DISCARD(exit.data*) \ 707266ff2a8SNicholas Piggin MEM_DISCARD(exit.rodata*) 708eb8f6890SSam Ravnborg 709eb8f6890SSam Ravnborg #define EXIT_TEXT \ 710eb8f6890SSam Ravnborg *(.exit.text) \ 711e41f501dSDmitry Vyukov *(.text.exit) \ 712eb8f6890SSam Ravnborg MEM_DISCARD(exit.text) 71301ba2bdcSSam Ravnborg 7147923f90fSSam Ravnborg #define EXIT_CALL \ 7157923f90fSSam Ravnborg *(.exitcall.exit) 7167923f90fSSam Ravnborg 717ef53dae8SSam Ravnborg /* 718ef53dae8SSam Ravnborg * bss (Block Started by Symbol) - uninitialized data 719ef53dae8SSam Ravnborg * zeroed during startup 720ef53dae8SSam Ravnborg */ 72104e448d9STim Abbott #define SBSS(sbss_align) \ 72204e448d9STim Abbott . = ALIGN(sbss_align); \ 723ef53dae8SSam Ravnborg .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 72483a092cfSNicholas Piggin *(.dynsbss) \ 725266ff2a8SNicholas Piggin *(SBSS_MAIN) \ 726ef53dae8SSam Ravnborg *(.scommon) \ 727ef53dae8SSam Ravnborg } 728ef53dae8SSam Ravnborg 729c87728caSDavid Daney /* 730c87728caSDavid Daney * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 731c87728caSDavid Daney * sections to the front of bss. 732c87728caSDavid Daney */ 733c87728caSDavid Daney #ifndef BSS_FIRST_SECTIONS 734c87728caSDavid Daney #define BSS_FIRST_SECTIONS 735c87728caSDavid Daney #endif 736c87728caSDavid Daney 737ef53dae8SSam Ravnborg #define BSS(bss_align) \ 738ef53dae8SSam Ravnborg . = ALIGN(bss_align); \ 739ef53dae8SSam Ravnborg .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 740c87728caSDavid Daney BSS_FIRST_SECTIONS \ 741de2b41beSJoerg Roedel . = ALIGN(PAGE_SIZE); \ 7427c74df07STim Abbott *(.bss..page_aligned) \ 743de2b41beSJoerg Roedel . = ALIGN(PAGE_SIZE); \ 744ef53dae8SSam Ravnborg *(.dynbss) \ 745cb87481eSNicholas Piggin *(BSS_MAIN) \ 746ef53dae8SSam Ravnborg *(COMMON) \ 747ef53dae8SSam Ravnborg } 748ef53dae8SSam Ravnborg 749ef53dae8SSam Ravnborg /* 750ef53dae8SSam Ravnborg * DWARF debug sections. 751ef53dae8SSam Ravnborg * Symbols in the DWARF debugging sections are relative to 752ef53dae8SSam Ravnborg * the beginning of the section so we begin them at 0. 753ef53dae8SSam Ravnborg */ 754a7d0c210SPaolo 'Blaisorblade' Giarrusso #define DWARF_DEBUG \ 755a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1 */ \ 756a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug 0 : { *(.debug) } \ 757a7d0c210SPaolo 'Blaisorblade' Giarrusso .line 0 : { *(.line) } \ 758a7d0c210SPaolo 'Blaisorblade' Giarrusso /* GNU DWARF 1 extensions */ \ 759a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 760a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_sfnames 0 : { *(.debug_sfnames) } \ 761a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1.1 and DWARF 2 */ \ 762a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_aranges 0 : { *(.debug_aranges) } \ 763a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_pubnames 0 : { *(.debug_pubnames) } \ 764a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 2 */ \ 765a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_info 0 : { *(.debug_info \ 766a7d0c210SPaolo 'Blaisorblade' Giarrusso .gnu.linkonce.wi.*) } \ 767a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_abbrev 0 : { *(.debug_abbrev) } \ 768a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_line 0 : { *(.debug_line) } \ 769a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_frame 0 : { *(.debug_frame) } \ 770a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_str 0 : { *(.debug_str) } \ 771a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_loc 0 : { *(.debug_loc) } \ 772a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_macinfo 0 : { *(.debug_macinfo) } \ 77383a092cfSNicholas Piggin .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 77483a092cfSNicholas Piggin /* DWARF 3 */ \ 77583a092cfSNicholas Piggin .debug_ranges 0 : { *(.debug_ranges) } \ 776a7d0c210SPaolo 'Blaisorblade' Giarrusso /* SGI/MIPS DWARF 2 extensions */ \ 777a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_weaknames 0 : { *(.debug_weaknames) } \ 778a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_funcnames 0 : { *(.debug_funcnames) } \ 779a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_typenames 0 : { *(.debug_typenames) } \ 780a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_varnames 0 : { *(.debug_varnames) } \ 78183a092cfSNicholas Piggin /* GNU DWARF 2 extensions */ \ 78283a092cfSNicholas Piggin .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 78383a092cfSNicholas Piggin .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 78483a092cfSNicholas Piggin /* DWARF 4 */ \ 78583a092cfSNicholas Piggin .debug_types 0 : { *(.debug_types) } \ 78683a092cfSNicholas Piggin /* DWARF 5 */ \ 7873c4fa46bSNick Desaulniers .debug_addr 0 : { *(.debug_addr) } \ 7883c4fa46bSNick Desaulniers .debug_line_str 0 : { *(.debug_line_str) } \ 7893c4fa46bSNick Desaulniers .debug_loclists 0 : { *(.debug_loclists) } \ 79083a092cfSNicholas Piggin .debug_macro 0 : { *(.debug_macro) } \ 7913c4fa46bSNick Desaulniers .debug_names 0 : { *(.debug_names) } \ 7923c4fa46bSNick Desaulniers .debug_rnglists 0 : { *(.debug_rnglists) } \ 7933c4fa46bSNick Desaulniers .debug_str_offsets 0 : { *(.debug_str_offsets) } 794a7d0c210SPaolo 'Blaisorblade' Giarrusso 795a7d0c210SPaolo 'Blaisorblade' Giarrusso /* Stabs debugging sections. */ 796a7d0c210SPaolo 'Blaisorblade' Giarrusso #define STABS_DEBUG \ 797a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab 0 : { *(.stab) } \ 798a7d0c210SPaolo 'Blaisorblade' Giarrusso .stabstr 0 : { *(.stabstr) } \ 799a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.excl 0 : { *(.stab.excl) } \ 800a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.exclstr 0 : { *(.stab.exclstr) } \ 801a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.index 0 : { *(.stab.index) } \ 802c604abc3SKees Cook .stab.indexstr 0 : { *(.stab.indexstr) } 803c604abc3SKees Cook 804c604abc3SKees Cook /* Required sections not related to debugging. */ 805c604abc3SKees Cook #define ELF_DETAILS \ 806a840c4deSKees Cook .comment 0 : { *(.comment) } \ 807a840c4deSKees Cook .symtab 0 : { *(.symtab) } \ 808a840c4deSKees Cook .strtab 0 : { *(.strtab) } \ 809a840c4deSKees Cook .shstrtab 0 : { *(.shstrtab) } 8109c9b8b38SJeremy Fitzhardinge 8116360b1fbSJan Beulich #ifdef CONFIG_GENERIC_BUG 8127664c5a1SJeremy Fitzhardinge #define BUG_TABLE \ 8137664c5a1SJeremy Fitzhardinge . = ALIGN(8); \ 8147664c5a1SJeremy Fitzhardinge __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 815*9b351be2SJim Cromie BOUNDED_SECTION_BY(__bug_table, ___bug_table) \ 8167664c5a1SJeremy Fitzhardinge } 8176360b1fbSJan Beulich #else 8186360b1fbSJan Beulich #define BUG_TABLE 8196360b1fbSJan Beulich #endif 8207664c5a1SJeremy Fitzhardinge 82111af8474SJosh Poimboeuf #ifdef CONFIG_UNWINDER_ORC 822ee9f8fceSJosh Poimboeuf #define ORC_UNWIND_TABLE \ 823ee9f8fceSJosh Poimboeuf . = ALIGN(4); \ 824ee9f8fceSJosh Poimboeuf .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 825*9b351be2SJim Cromie BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip) \ 826ee9f8fceSJosh Poimboeuf } \ 827f76a16adSJosh Poimboeuf . = ALIGN(2); \ 828ee9f8fceSJosh Poimboeuf .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 829*9b351be2SJim Cromie BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind) \ 830ee9f8fceSJosh Poimboeuf } \ 831ca136cacSKristen Carlson Accardi text_size = _etext - _stext; \ 832ee9f8fceSJosh Poimboeuf . = ALIGN(4); \ 833ee9f8fceSJosh Poimboeuf .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 834a6214385SMasahiro Yamada orc_lookup = .; \ 835ca136cacSKristen Carlson Accardi . += (((text_size + LOOKUP_BLOCK_SIZE - 1) / \ 836ee9f8fceSJosh Poimboeuf LOOKUP_BLOCK_SIZE) + 1) * 4; \ 837a6214385SMasahiro Yamada orc_lookup_end = .; \ 838ee9f8fceSJosh Poimboeuf } 839ee9f8fceSJosh Poimboeuf #else 840ee9f8fceSJosh Poimboeuf #define ORC_UNWIND_TABLE 841ee9f8fceSJosh Poimboeuf #endif 842ee9f8fceSJosh Poimboeuf 843771856caSLuis Chamberlain /* Built-in firmware blobs */ 844771856caSLuis Chamberlain #ifdef CONFIG_FW_LOADER 845771856caSLuis Chamberlain #define FW_LOADER_BUILT_IN_DATA \ 846771856caSLuis Chamberlain .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 847*9b351be2SJim Cromie BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \ 848771856caSLuis Chamberlain } 849771856caSLuis Chamberlain #else 850771856caSLuis Chamberlain #define FW_LOADER_BUILT_IN_DATA 851771856caSLuis Chamberlain #endif 852771856caSLuis Chamberlain 85363687a52SJan Beulich #ifdef CONFIG_PM_TRACE 85463687a52SJan Beulich #define TRACEDATA \ 85563687a52SJan Beulich . = ALIGN(4); \ 85663687a52SJan Beulich .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 857*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \ 85863687a52SJan Beulich } 85963687a52SJan Beulich #else 86063687a52SJan Beulich #define TRACEDATA 86163687a52SJan Beulich #endif 86263687a52SJan Beulich 86333701557SChris Down #ifdef CONFIG_PRINTK_INDEX 86433701557SChris Down #define PRINTK_INDEX \ 86533701557SChris Down .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) { \ 866*9b351be2SJim Cromie BOUNDED_SECTION_BY(.printk_index, _printk_index) \ 86733701557SChris Down } 86833701557SChris Down #else 86933701557SChris Down #define PRINTK_INDEX 87033701557SChris Down #endif 87133701557SChris Down 8729c9b8b38SJeremy Fitzhardinge #define NOTES \ 873cbe87121SRoland McGrath .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 874*9b351be2SJim Cromie BOUNDED_SECTION_BY(.note.*, _notes) \ 875fbe6a8e6SKees Cook } NOTES_HEADERS \ 876fbe6a8e6SKees Cook NOTES_HEADERS_RESTORE 87761ce1efeSAndrew Morton 878ef53dae8SSam Ravnborg #define INIT_SETUP(initsetup_align) \ 879ef53dae8SSam Ravnborg . = ALIGN(initsetup_align); \ 880*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end) 881ef53dae8SSam Ravnborg 882026cee00SPawel Moll #define INIT_CALLS_LEVEL(level) \ 883a6214385SMasahiro Yamada __initcall##level##_start = .; \ 884b67067f1SNicholas Piggin KEEP(*(.initcall##level##.init)) \ 885b67067f1SNicholas Piggin KEEP(*(.initcall##level##s.init)) \ 88661ce1efeSAndrew Morton 887ef53dae8SSam Ravnborg #define INIT_CALLS \ 888a6214385SMasahiro Yamada __initcall_start = .; \ 889b67067f1SNicholas Piggin KEEP(*(.initcallearly.init)) \ 890026cee00SPawel Moll INIT_CALLS_LEVEL(0) \ 891026cee00SPawel Moll INIT_CALLS_LEVEL(1) \ 892026cee00SPawel Moll INIT_CALLS_LEVEL(2) \ 893026cee00SPawel Moll INIT_CALLS_LEVEL(3) \ 894026cee00SPawel Moll INIT_CALLS_LEVEL(4) \ 895026cee00SPawel Moll INIT_CALLS_LEVEL(5) \ 896026cee00SPawel Moll INIT_CALLS_LEVEL(rootfs) \ 897026cee00SPawel Moll INIT_CALLS_LEVEL(6) \ 898026cee00SPawel Moll INIT_CALLS_LEVEL(7) \ 899a6214385SMasahiro Yamada __initcall_end = .; 900ef53dae8SSam Ravnborg 901ef53dae8SSam Ravnborg #define CON_INITCALL \ 902*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end) 903ef53dae8SSam Ravnborg 90490a025a8SBrendan Higgins /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 90590a025a8SBrendan Higgins #define KUNIT_TABLE() \ 90690a025a8SBrendan Higgins . = ALIGN(8); \ 907*9b351be2SJim Cromie BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end) 90890a025a8SBrendan Higgins 909ef53dae8SSam Ravnborg #ifdef CONFIG_BLK_DEV_INITRD 910ef53dae8SSam Ravnborg #define INIT_RAM_FS \ 911d8826262SMike Frysinger . = ALIGN(4); \ 912a6214385SMasahiro Yamada __initramfs_start = .; \ 913b67067f1SNicholas Piggin KEEP(*(.init.ramfs)) \ 914ffe8018cSHendrik Brueckner . = ALIGN(8); \ 915b67067f1SNicholas Piggin KEEP(*(.init.ramfs.info)) 916ef53dae8SSam Ravnborg #else 917eadfe219SDavid Howells #define INIT_RAM_FS 918ef53dae8SSam Ravnborg #endif 919ef53dae8SSam Ravnborg 920023bf6f1STejun Heo /* 921ac26963aSBrijesh Singh * Memory encryption operates on a page basis. Since we need to clear 922ac26963aSBrijesh Singh * the memory encryption mask for this section, it needs to be aligned 923ac26963aSBrijesh Singh * on a page boundary and be a page-size multiple in length. 924ac26963aSBrijesh Singh * 925ac26963aSBrijesh Singh * Note: We use a separate section so that only this section gets 926ac26963aSBrijesh Singh * decrypted to avoid exposing more than we wish. 927ac26963aSBrijesh Singh */ 928ac26963aSBrijesh Singh #ifdef CONFIG_AMD_MEM_ENCRYPT 929ac26963aSBrijesh Singh #define PERCPU_DECRYPTED_SECTION \ 930ac26963aSBrijesh Singh . = ALIGN(PAGE_SIZE); \ 931d4c63999SNathan Chancellor *(.data..decrypted) \ 932ac26963aSBrijesh Singh *(.data..percpu..decrypted) \ 933ac26963aSBrijesh Singh . = ALIGN(PAGE_SIZE); 934ac26963aSBrijesh Singh #else 935ac26963aSBrijesh Singh #define PERCPU_DECRYPTED_SECTION 936ac26963aSBrijesh Singh #endif 937ac26963aSBrijesh Singh 938ac26963aSBrijesh Singh 939ac26963aSBrijesh Singh /* 940023bf6f1STejun Heo * Default discarded sections. 941023bf6f1STejun Heo * 942023bf6f1STejun Heo * Some archs want to discard exit text/data at runtime rather than 943023bf6f1STejun Heo * link time due to cross-section references such as alt instructions, 944023bf6f1STejun Heo * bug table, eh_frame, etc. DISCARDS must be the last of output 945023bf6f1STejun Heo * section definitions so that such archs put those in earlier section 946023bf6f1STejun Heo * definitions. 947023bf6f1STejun Heo */ 94884d5f77fSH.J. Lu #ifdef RUNTIME_DISCARD_EXIT 94984d5f77fSH.J. Lu #define EXIT_DISCARDS 95084d5f77fSH.J. Lu #else 95184d5f77fSH.J. Lu #define EXIT_DISCARDS \ 95284d5f77fSH.J. Lu EXIT_TEXT \ 95384d5f77fSH.J. Lu EXIT_DATA 95484d5f77fSH.J. Lu #endif 95584d5f77fSH.J. Lu 956d812db78SKees Cook /* 957f5b6a74dSNathan Chancellor * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 958f5b6a74dSNathan Chancellor * -fsanitize=thread produce unwanted sections (.eh_frame 959f5b6a74dSNathan Chancellor * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 960f5b6a74dSNathan Chancellor * keep any .init_array.* sections. 961d812db78SKees Cook * https://bugs.llvm.org/show_bug.cgi?id=46478 962d812db78SKees Cook */ 96389245600SSami Tolvanen #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 964d812db78SKees Cook # ifdef CONFIG_CONSTRUCTORS 965d812db78SKees Cook # define SANITIZER_DISCARDS \ 966d812db78SKees Cook *(.eh_frame) 967d812db78SKees Cook # else 968d812db78SKees Cook # define SANITIZER_DISCARDS \ 969d812db78SKees Cook *(.init_array) *(.init_array.*) \ 970d812db78SKees Cook *(.eh_frame) 971d812db78SKees Cook # endif 972d812db78SKees Cook #else 973d812db78SKees Cook # define SANITIZER_DISCARDS 974d812db78SKees Cook #endif 975d812db78SKees Cook 97603c2b85cSKees Cook #define COMMON_DISCARDS \ 977d812db78SKees Cook SANITIZER_DISCARDS \ 9789440155cSPeter Zijlstra (Intel) PATCHABLE_DISCARDS \ 97903c2b85cSKees Cook *(.discard) \ 98003c2b85cSKees Cook *(.discard.*) \ 981dfbe6968SKees Cook *(.modinfo) \ 982dfbe6968SKees Cook /* ld.bfd warns about .gnu.version* even when not emitted */ \ 983dfbe6968SKees Cook *(.gnu.version*) \ 98403c2b85cSKees Cook 985405d967dSTejun Heo #define DISCARDS \ 986405d967dSTejun Heo /DISCARD/ : { \ 98784d5f77fSH.J. Lu EXIT_DISCARDS \ 988023bf6f1STejun Heo EXIT_CALL \ 98903c2b85cSKees Cook COMMON_DISCARDS \ 990405d967dSTejun Heo } 991405d967dSTejun Heo 9923e5d8f97STejun Heo /** 9936ea0c34dSMike Frysinger * PERCPU_INPUT - the percpu input sections 9946ea0c34dSMike Frysinger * @cacheline: cacheline size 9956ea0c34dSMike Frysinger * 9966ea0c34dSMike Frysinger * The core percpu section names and core symbols which do not rely 9976ea0c34dSMike Frysinger * directly upon load addresses. 9986ea0c34dSMike Frysinger * 9996ea0c34dSMike Frysinger * @cacheline is used to align subsections to avoid false cacheline 10006ea0c34dSMike Frysinger * sharing between subsections for different purposes. 10016ea0c34dSMike Frysinger */ 10026ea0c34dSMike Frysinger #define PERCPU_INPUT(cacheline) \ 1003a6214385SMasahiro Yamada __per_cpu_start = .; \ 10046ea0c34dSMike Frysinger *(.data..percpu..first) \ 10056ea0c34dSMike Frysinger . = ALIGN(PAGE_SIZE); \ 10066ea0c34dSMike Frysinger *(.data..percpu..page_aligned) \ 10076ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 1008330d2822SZhengyu He *(.data..percpu..read_mostly) \ 10096ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 10106ea0c34dSMike Frysinger *(.data..percpu) \ 10116ea0c34dSMike Frysinger *(.data..percpu..shared_aligned) \ 1012ac26963aSBrijesh Singh PERCPU_DECRYPTED_SECTION \ 1013a6214385SMasahiro Yamada __per_cpu_end = .; 10146ea0c34dSMike Frysinger 10156ea0c34dSMike Frysinger /** 10166b7c38d5STejun Heo * PERCPU_VADDR - define output section for percpu area 101719df0c2fSTejun Heo * @cacheline: cacheline size 10183e5d8f97STejun Heo * @vaddr: explicit base address (optional) 10193e5d8f97STejun Heo * @phdr: destination PHDR (optional) 10203e5d8f97STejun Heo * 102119df0c2fSTejun Heo * Macro which expands to output section for percpu area. 102219df0c2fSTejun Heo * 102319df0c2fSTejun Heo * @cacheline is used to align subsections to avoid false cacheline 102419df0c2fSTejun Heo * sharing between subsections for different purposes. 102519df0c2fSTejun Heo * 102619df0c2fSTejun Heo * If @vaddr is not blank, it specifies explicit base address and all 102719df0c2fSTejun Heo * percpu symbols will be offset from the given address. If blank, 102819df0c2fSTejun Heo * @vaddr always equals @laddr + LOAD_OFFSET. 10293e5d8f97STejun Heo * 10303e5d8f97STejun Heo * @phdr defines the output PHDR to use if not blank. Be warned that 10313e5d8f97STejun Heo * output PHDR is sticky. If @phdr is specified, the next output 10323e5d8f97STejun Heo * section in the linker script will go there too. @phdr should have 10333e5d8f97STejun Heo * a leading colon. 10343e5d8f97STejun Heo * 10353ac6cffeSTejun Heo * Note that this macros defines __per_cpu_load as an absolute symbol. 10363ac6cffeSTejun Heo * If there is no need to put the percpu section at a predetermined 10370415b00dSTejun Heo * address, use PERCPU_SECTION. 10383e5d8f97STejun Heo */ 103919df0c2fSTejun Heo #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1040a6214385SMasahiro Yamada __per_cpu_load = .; \ 1041a6214385SMasahiro Yamada .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 10426ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 10436b7c38d5STejun Heo } phdr \ 1044a6214385SMasahiro Yamada . = __per_cpu_load + SIZEOF(.data..percpu); 10453e5d8f97STejun Heo 10463e5d8f97STejun Heo /** 10470415b00dSTejun Heo * PERCPU_SECTION - define output section for percpu area, simple version 104819df0c2fSTejun Heo * @cacheline: cacheline size 10493e5d8f97STejun Heo * 10500415b00dSTejun Heo * Align to PAGE_SIZE and outputs output section for percpu area. This 10510415b00dSTejun Heo * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 10523e5d8f97STejun Heo * __per_cpu_start will be identical. 10533ac6cffeSTejun Heo * 10540415b00dSTejun Heo * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 105519df0c2fSTejun Heo * except that __per_cpu_load is defined as a relative symbol against 105619df0c2fSTejun Heo * .data..percpu which is required for relocatable x86_32 configuration. 10573e5d8f97STejun Heo */ 10580415b00dSTejun Heo #define PERCPU_SECTION(cacheline) \ 10590415b00dSTejun Heo . = ALIGN(PAGE_SIZE); \ 10603d9a854cSDenys Vlasenko .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1061a6214385SMasahiro Yamada __per_cpu_load = .; \ 10626ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 10633ac6cffeSTejun Heo } 1064ef53dae8SSam Ravnborg 1065ef53dae8SSam Ravnborg 1066ef53dae8SSam Ravnborg /* 1067ef53dae8SSam Ravnborg * Definition of the high level *_SECTION macros 1068ef53dae8SSam Ravnborg * They will fit only a subset of the architectures 1069ef53dae8SSam Ravnborg */ 1070ef53dae8SSam Ravnborg 1071ef53dae8SSam Ravnborg 1072ef53dae8SSam Ravnborg /* 1073ef53dae8SSam Ravnborg * Writeable data. 1074ef53dae8SSam Ravnborg * All sections are combined in a single .data section. 1075ef53dae8SSam Ravnborg * The sections following CONSTRUCTORS are arranged so their 1076ef53dae8SSam Ravnborg * typical alignment matches. 1077ef53dae8SSam Ravnborg * A cacheline is typical/always less than a PAGE_SIZE so 1078ef53dae8SSam Ravnborg * the sections that has this restriction (or similar) 1079ef53dae8SSam Ravnborg * is located before the ones requiring PAGE_SIZE alignment. 1080ef53dae8SSam Ravnborg * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 108125985edcSLucas De Marchi * matches the requirement of PAGE_ALIGNED_DATA. 1082ef53dae8SSam Ravnborg * 10837923f90fSSam Ravnborg * use 0 as page_align if page_aligned data is not used */ 1084c9174047SKees Cook #define RW_DATA(cacheline, pagealigned, inittask) \ 1085ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 1086ef53dae8SSam Ravnborg .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 108739a449d9STim Abbott INIT_TASK_DATA(inittask) \ 10881b208622STim Abbott NOSAVE_DATA \ 10891b208622STim Abbott PAGE_ALIGNED_DATA(pagealigned) \ 1090ef53dae8SSam Ravnborg CACHELINE_ALIGNED_DATA(cacheline) \ 1091ef53dae8SSam Ravnborg READ_MOSTLY_DATA(cacheline) \ 1092ef53dae8SSam Ravnborg DATA_DATA \ 1093ef53dae8SSam Ravnborg CONSTRUCTORS \ 109419d43626SPeter Zijlstra } \ 1095ee9f8fceSJosh Poimboeuf BUG_TABLE \ 1096ef53dae8SSam Ravnborg 1097ef53dae8SSam Ravnborg #define INIT_TEXT_SECTION(inittext_align) \ 1098ef53dae8SSam Ravnborg . = ALIGN(inittext_align); \ 1099ef53dae8SSam Ravnborg .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1100a6214385SMasahiro Yamada _sinittext = .; \ 1101ef53dae8SSam Ravnborg INIT_TEXT \ 1102a6214385SMasahiro Yamada _einittext = .; \ 1103ef53dae8SSam Ravnborg } 1104ef53dae8SSam Ravnborg 1105ef53dae8SSam Ravnborg #define INIT_DATA_SECTION(initsetup_align) \ 1106ef53dae8SSam Ravnborg .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1107ef53dae8SSam Ravnborg INIT_DATA \ 1108ef53dae8SSam Ravnborg INIT_SETUP(initsetup_align) \ 1109ef53dae8SSam Ravnborg INIT_CALLS \ 1110ef53dae8SSam Ravnborg CON_INITCALL \ 1111ef53dae8SSam Ravnborg INIT_RAM_FS \ 1112ef53dae8SSam Ravnborg } 1113ef53dae8SSam Ravnborg 111404e448d9STim Abbott #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 111504e448d9STim Abbott . = ALIGN(sbss_align); \ 1116a6214385SMasahiro Yamada __bss_start = .; \ 111704e448d9STim Abbott SBSS(sbss_align) \ 1118ef53dae8SSam Ravnborg BSS(bss_align) \ 111904e448d9STim Abbott . = ALIGN(stop_align); \ 1120a6214385SMasahiro Yamada __bss_stop = .; 1121