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 * 93266ff2a8SNicholas Piggin * RODATA_MAIN is not used because existing code already defines .rodata.x 94266ff2a8SNicholas Piggin * sections to be brought in with rodata. 95cb87481eSNicholas Piggin */ 96cb87481eSNicholas Piggin #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 97cb87481eSNicholas Piggin #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 98*9a427556SAlexander Lobakin #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* 99266ff2a8SNicholas Piggin #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 100*9a427556SAlexander Lobakin #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 101*9a427556SAlexander Lobakin #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral* 102266ff2a8SNicholas Piggin #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 103cb87481eSNicholas Piggin #else 104cb87481eSNicholas Piggin #define TEXT_MAIN .text 105cb87481eSNicholas Piggin #define DATA_MAIN .data 106266ff2a8SNicholas Piggin #define SDATA_MAIN .sdata 107266ff2a8SNicholas Piggin #define RODATA_MAIN .rodata 108cb87481eSNicholas Piggin #define BSS_MAIN .bss 109266ff2a8SNicholas Piggin #define SBSS_MAIN .sbss 110cb87481eSNicholas Piggin #endif 111cb87481eSNicholas Piggin 112cb87481eSNicholas Piggin /* 11385c2ce91SPeter Zijlstra * GCC 4.5 and later have a 32 bytes section alignment for structures. 11485c2ce91SPeter Zijlstra * Except GCC 4.9, that feels the need to align on 64 bytes. 11507fca0e5SSam Ravnborg */ 11685c2ce91SPeter Zijlstra #if __GNUC__ == 4 && __GNUC_MINOR__ == 9 11785c2ce91SPeter Zijlstra #define STRUCT_ALIGNMENT 64 11885c2ce91SPeter Zijlstra #else 119aab94339SDirk Brandewie #define STRUCT_ALIGNMENT 32 12085c2ce91SPeter Zijlstra #endif 121aab94339SDirk Brandewie #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 12207fca0e5SSam Ravnborg 12385c2ce91SPeter Zijlstra /* 124590d6979SSteven Rostedt (VMware) * The order of the sched class addresses are important, as they are 125590d6979SSteven Rostedt (VMware) * used to determine the order of the priority of each sched class in 126590d6979SSteven Rostedt (VMware) * relation to each other. 127590d6979SSteven Rostedt (VMware) */ 128590d6979SSteven Rostedt (VMware) #define SCHED_DATA \ 129c3a340f7SSteven Rostedt (VMware) STRUCT_ALIGN(); \ 130c3a340f7SSteven Rostedt (VMware) __begin_sched_classes = .; \ 131590d6979SSteven Rostedt (VMware) *(__idle_sched_class) \ 132590d6979SSteven Rostedt (VMware) *(__fair_sched_class) \ 133590d6979SSteven Rostedt (VMware) *(__rt_sched_class) \ 134590d6979SSteven Rostedt (VMware) *(__dl_sched_class) \ 135c3a340f7SSteven Rostedt (VMware) *(__stop_sched_class) \ 136c3a340f7SSteven Rostedt (VMware) __end_sched_classes = .; 137590d6979SSteven Rostedt (VMware) 138eb8f6890SSam Ravnborg /* The actual configuration determine if the init/exit sections 139eb8f6890SSam Ravnborg * are handled as text/data or they can be discarded (which 140eb8f6890SSam Ravnborg * often happens at runtime) 141eb8f6890SSam Ravnborg */ 142eb8f6890SSam Ravnborg #ifdef CONFIG_HOTPLUG_CPU 143eb8f6890SSam Ravnborg #define CPU_KEEP(sec) *(.cpu##sec) 144eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) 145eb8f6890SSam Ravnborg #else 146eb8f6890SSam Ravnborg #define CPU_KEEP(sec) 147eb8f6890SSam Ravnborg #define CPU_DISCARD(sec) *(.cpu##sec) 148eb8f6890SSam Ravnborg #endif 149eb8f6890SSam Ravnborg 1501a3fb6d4SAdrian Bunk #if defined(CONFIG_MEMORY_HOTPLUG) 151eb8f6890SSam Ravnborg #define MEM_KEEP(sec) *(.mem##sec) 152eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) 153eb8f6890SSam Ravnborg #else 154eb8f6890SSam Ravnborg #define MEM_KEEP(sec) 155eb8f6890SSam Ravnborg #define MEM_DISCARD(sec) *(.mem##sec) 156eb8f6890SSam Ravnborg #endif 157eb8f6890SSam Ravnborg 1588da3821bSSteven Rostedt #ifdef CONFIG_FTRACE_MCOUNT_RECORD 159a1326b17SMark Rutland /* 160a1326b17SMark Rutland * The ftrace call sites are logged to a section whose name depends on the 161a1326b17SMark Rutland * compiler option used. A given kernel image will only use one, AKA 162a1326b17SMark Rutland * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 163a1326b17SMark Rutland * dependencies for FTRACE_CALLSITE_SECTION's definition. 16495f1fa9eSLinus Torvalds * 16546f94692SSteven Rostedt (VMware) * Need to also make ftrace_stub_graph point to ftrace_stub 166b83b43ffSSteven Rostedt (VMware) * so that the same stub location may have different protocols 167b83b43ffSSteven Rostedt (VMware) * and not mess up with C verifiers. 168a1326b17SMark Rutland */ 1694b3b4c5eSJohn Reiser #define MCOUNT_REC() . = ALIGN(8); \ 170a6214385SMasahiro Yamada __start_mcount_loc = .; \ 171266ff2a8SNicholas Piggin KEEP(*(__mcount_loc)) \ 172a1326b17SMark Rutland KEEP(*(__patchable_function_entries)) \ 173b83b43ffSSteven Rostedt (VMware) __stop_mcount_loc = .; \ 17446f94692SSteven Rostedt (VMware) ftrace_stub_graph = ftrace_stub; 1758da3821bSSteven Rostedt #else 176b83b43ffSSteven Rostedt (VMware) # ifdef CONFIG_FUNCTION_TRACER 17746f94692SSteven Rostedt (VMware) # define MCOUNT_REC() ftrace_stub_graph = ftrace_stub; 1788da3821bSSteven Rostedt # else 1798da3821bSSteven Rostedt # define MCOUNT_REC() 1808da3821bSSteven Rostedt # endif 181b83b43ffSSteven Rostedt (VMware) #endif 182eb8f6890SSam Ravnborg 1832ed84eebSSteven Rostedt #ifdef CONFIG_TRACE_BRANCH_PROFILING 184a6214385SMasahiro Yamada #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \ 185266ff2a8SNicholas Piggin KEEP(*(_ftrace_annotated_branch)) \ 186a6214385SMasahiro Yamada __stop_annotated_branch_profile = .; 1871f0d69a9SSteven Rostedt #else 1881f0d69a9SSteven Rostedt #define LIKELY_PROFILE() 1891f0d69a9SSteven Rostedt #endif 1901f0d69a9SSteven Rostedt 1912bcd521aSSteven Rostedt #ifdef CONFIG_PROFILE_ALL_BRANCHES 192a6214385SMasahiro Yamada #define BRANCH_PROFILE() __start_branch_profile = .; \ 193266ff2a8SNicholas Piggin KEEP(*(_ftrace_branch)) \ 194a6214385SMasahiro Yamada __stop_branch_profile = .; 1952bcd521aSSteven Rostedt #else 1962bcd521aSSteven Rostedt #define BRANCH_PROFILE() 1972bcd521aSSteven Rostedt #endif 1982bcd521aSSteven Rostedt 199376e2424SMasami Hiramatsu #ifdef CONFIG_KPROBES 20069902c71SVineet Gupta #define KPROBE_BLACKLIST() . = ALIGN(8); \ 201a6214385SMasahiro Yamada __start_kprobe_blacklist = .; \ 2024b89b7f7SNicholas Piggin KEEP(*(_kprobe_blacklist)) \ 203a6214385SMasahiro Yamada __stop_kprobe_blacklist = .; 204376e2424SMasami Hiramatsu #else 205376e2424SMasami Hiramatsu #define KPROBE_BLACKLIST() 206376e2424SMasami Hiramatsu #endif 207376e2424SMasami Hiramatsu 208540adea3SMasami Hiramatsu #ifdef CONFIG_FUNCTION_ERROR_INJECTION 209663faf9fSMasami Hiramatsu #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \ 210a6214385SMasahiro Yamada __start_error_injection_whitelist = .; \ 211540adea3SMasami Hiramatsu KEEP(*(_error_injection_whitelist)) \ 212a6214385SMasahiro Yamada __stop_error_injection_whitelist = .; 21392ace999SJosef Bacik #else 214540adea3SMasami Hiramatsu #define ERROR_INJECT_WHITELIST() 21592ace999SJosef Bacik #endif 21692ace999SJosef Bacik 2175f77a88bSTom Zanussi #ifdef CONFIG_EVENT_TRACING 218e4a9ea5eSSteven Rostedt #define FTRACE_EVENTS() . = ALIGN(8); \ 219a6214385SMasahiro Yamada __start_ftrace_events = .; \ 2204b89b7f7SNicholas Piggin KEEP(*(_ftrace_events)) \ 221a6214385SMasahiro Yamada __stop_ftrace_events = .; \ 222a6214385SMasahiro Yamada __start_ftrace_eval_maps = .; \ 22302fd7f68SJeremy Linton KEEP(*(_ftrace_eval_map)) \ 224a6214385SMasahiro Yamada __stop_ftrace_eval_maps = .; 225b77e38aaSSteven Rostedt #else 226b77e38aaSSteven Rostedt #define FTRACE_EVENTS() 227b77e38aaSSteven Rostedt #endif 228b77e38aaSSteven Rostedt 2291ba28e02SLai Jiangshan #ifdef CONFIG_TRACING 230a6214385SMasahiro Yamada #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \ 2314b89b7f7SNicholas Piggin KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ 232a6214385SMasahiro Yamada __stop___trace_bprintk_fmt = .; 233a6214385SMasahiro Yamada #define TRACEPOINT_STR() __start___tracepoint_str = .; \ 2344b89b7f7SNicholas Piggin KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ 235a6214385SMasahiro Yamada __stop___tracepoint_str = .; 2361ba28e02SLai Jiangshan #else 2371ba28e02SLai Jiangshan #define TRACE_PRINTKS() 238102c9323SSteven Rostedt (Red Hat) #define TRACEPOINT_STR() 2391ba28e02SLai Jiangshan #endif 2401ba28e02SLai Jiangshan 241bed1ffcaSFrederic Weisbecker #ifdef CONFIG_FTRACE_SYSCALLS 2423d56e331SSteven Rostedt #define TRACE_SYSCALLS() . = ALIGN(8); \ 243a6214385SMasahiro Yamada __start_syscalls_metadata = .; \ 2444b89b7f7SNicholas Piggin KEEP(*(__syscalls_metadata)) \ 245a6214385SMasahiro Yamada __stop_syscalls_metadata = .; 246bed1ffcaSFrederic Weisbecker #else 247bed1ffcaSFrederic Weisbecker #define TRACE_SYSCALLS() 248bed1ffcaSFrederic Weisbecker #endif 249bed1ffcaSFrederic Weisbecker 250c4f6699dSAlexei Starovoitov #ifdef CONFIG_BPF_EVENTS 251c4f6699dSAlexei Starovoitov #define BPF_RAW_TP() STRUCT_ALIGN(); \ 252a6214385SMasahiro Yamada __start__bpf_raw_tp = .; \ 253c4f6699dSAlexei Starovoitov KEEP(*(__bpf_raw_tp_map)) \ 254a6214385SMasahiro Yamada __stop__bpf_raw_tp = .; 255c4f6699dSAlexei Starovoitov #else 256c4f6699dSAlexei Starovoitov #define BPF_RAW_TP() 257c4f6699dSAlexei Starovoitov #endif 258c4f6699dSAlexei Starovoitov 259470ca0deSPeter Hurley #ifdef CONFIG_SERIAL_EARLYCON 260dd709e72SDaniel Kurtz #define EARLYCON_TABLE() . = ALIGN(8); \ 261a6214385SMasahiro Yamada __earlycon_table = .; \ 2624b89b7f7SNicholas Piggin KEEP(*(__earlycon_table)) \ 263a6214385SMasahiro Yamada __earlycon_table_end = .; 264470ca0deSPeter Hurley #else 265470ca0deSPeter Hurley #define EARLYCON_TABLE() 266470ca0deSPeter Hurley #endif 267aab94339SDirk Brandewie 2683ac946d1SKees Cook #ifdef CONFIG_SECURITY 2693ac946d1SKees Cook #define LSM_TABLE() . = ALIGN(8); \ 2703ac946d1SKees Cook __start_lsm_info = .; \ 2713ac946d1SKees Cook KEEP(*(.lsm_info.init)) \ 2723ac946d1SKees Cook __end_lsm_info = .; 273e6b1db98SMatthew Garrett #define EARLY_LSM_TABLE() . = ALIGN(8); \ 274e6b1db98SMatthew Garrett __start_early_lsm_info = .; \ 275e6b1db98SMatthew Garrett KEEP(*(.early_lsm_info.init)) \ 276e6b1db98SMatthew Garrett __end_early_lsm_info = .; 2773ac946d1SKees Cook #else 2783ac946d1SKees Cook #define LSM_TABLE() 279e6b1db98SMatthew Garrett #define EARLY_LSM_TABLE() 2803ac946d1SKees Cook #endif 2813ac946d1SKees Cook 28206309288SRob Herring #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 28306309288SRob Herring #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 2845ee02af1SMasahiro Yamada #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 28506309288SRob Herring #define _OF_TABLE_0(name) 28606309288SRob Herring #define _OF_TABLE_1(name) \ 287f6e916b8SThomas Petazzoni . = ALIGN(8); \ 288a6214385SMasahiro Yamada __##name##_of_table = .; \ 2894b89b7f7SNicholas Piggin KEEP(*(__##name##_of_table)) \ 2904b89b7f7SNicholas Piggin KEEP(*(__##name##_of_table_end)) 291aab94339SDirk Brandewie 292bb0eb050SDaniel Lezcano #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 29306309288SRob Herring #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 29406309288SRob Herring #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 29506309288SRob Herring #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 29606309288SRob Herring #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 297449e056cSDaniel Lezcano #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 2986c3ff8b1SStephen Boyd 299e647b532SMarc Zyngier #ifdef CONFIG_ACPI 300e647b532SMarc Zyngier #define ACPI_PROBE_TABLE(name) \ 301e647b532SMarc Zyngier . = ALIGN(8); \ 302a6214385SMasahiro Yamada __##name##_acpi_probe_table = .; \ 3034b89b7f7SNicholas Piggin KEEP(*(__##name##_acpi_probe_table)) \ 304a6214385SMasahiro Yamada __##name##_acpi_probe_table_end = .; 305e647b532SMarc Zyngier #else 306e647b532SMarc Zyngier #define ACPI_PROBE_TABLE(name) 307e647b532SMarc Zyngier #endif 308e647b532SMarc Zyngier 309980af75eSDaniel Lezcano #ifdef CONFIG_THERMAL 310980af75eSDaniel Lezcano #define THERMAL_TABLE(name) \ 311980af75eSDaniel Lezcano . = ALIGN(8); \ 312980af75eSDaniel Lezcano __##name##_thermal_table = .; \ 313980af75eSDaniel Lezcano KEEP(*(__##name##_thermal_table)) \ 314980af75eSDaniel Lezcano __##name##_thermal_table_end = .; 315980af75eSDaniel Lezcano #else 316980af75eSDaniel Lezcano #define THERMAL_TABLE(name) 317980af75eSDaniel Lezcano #endif 318980af75eSDaniel Lezcano 319aab94339SDirk Brandewie #define KERNEL_DTB() \ 320aab94339SDirk Brandewie STRUCT_ALIGN(); \ 321a6214385SMasahiro Yamada __dtb_start = .; \ 3224b89b7f7SNicholas Piggin KEEP(*(.dtb.init.rodata)) \ 323a6214385SMasahiro Yamada __dtb_end = .; 324aab94339SDirk Brandewie 325b67067f1SNicholas Piggin /* 326b67067f1SNicholas Piggin * .data section 327b67067f1SNicholas Piggin */ 328ca967258SSam Ravnborg #define DATA_DATA \ 329129f6c48SArnd Bergmann *(.xiptext) \ 330cb87481eSNicholas Piggin *(DATA_MAIN) \ 331312b1485SSam Ravnborg *(.ref.data) \ 332d356c0b6SMike Frysinger *(.data..shared_aligned) /* percpu related */ \ 333266ff2a8SNicholas Piggin MEM_KEEP(init.data*) \ 334266ff2a8SNicholas Piggin MEM_KEEP(exit.data*) \ 3357ccaba53SJan Beulich *(.data.unlikely) \ 336a6214385SMasahiro Yamada __start_once = .; \ 337b1fca27dSAndi Kleen *(.data.once) \ 338a6214385SMasahiro Yamada __end_once = .; \ 33965498646SMathieu Desnoyers STRUCT_ALIGN(); \ 34097e1c18eSMathieu Desnoyers *(__tracepoints) \ 341e9d376f0SJason Baron /* implement dynamic printk debug */ \ 342e9d376f0SJason Baron . = ALIGN(8); \ 343e5ebffe1SJim Cromie __start___dyndbg = .; \ 344e5ebffe1SJim Cromie KEEP(*(__dyndbg)) \ 345e5ebffe1SJim Cromie __stop___dyndbg = .; \ 3462bcd521aSSteven Rostedt LIKELY_PROFILE() \ 347b77e38aaSSteven Rostedt BRANCH_PROFILE() \ 348102c9323SSteven Rostedt (Red Hat) TRACE_PRINTKS() \ 349c4f6699dSAlexei Starovoitov BPF_RAW_TP() \ 350102c9323SSteven Rostedt (Red Hat) TRACEPOINT_STR() 351ca967258SSam Ravnborg 352ef53dae8SSam Ravnborg /* 353ef53dae8SSam Ravnborg * Data section helpers 354ef53dae8SSam Ravnborg */ 355ef53dae8SSam Ravnborg #define NOSAVE_DATA \ 356ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 357a6214385SMasahiro Yamada __nosave_begin = .; \ 35807b3bb1eSDenys Vlasenko *(.data..nosave) \ 359ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 360a6214385SMasahiro Yamada __nosave_end = .; 361ef53dae8SSam Ravnborg 362ef53dae8SSam Ravnborg #define PAGE_ALIGNED_DATA(page_align) \ 363ef53dae8SSam Ravnborg . = ALIGN(page_align); \ 364de2b41beSJoerg Roedel *(.data..page_aligned) \ 365de2b41beSJoerg Roedel . = ALIGN(page_align); 366ef53dae8SSam Ravnborg 367ef53dae8SSam Ravnborg #define READ_MOSTLY_DATA(align) \ 368ef53dae8SSam Ravnborg . = ALIGN(align); \ 3698369744fSShaohua Li *(.data..read_mostly) \ 3708369744fSShaohua Li . = ALIGN(align); 371ef53dae8SSam Ravnborg 372ef53dae8SSam Ravnborg #define CACHELINE_ALIGNED_DATA(align) \ 373ef53dae8SSam Ravnborg . = ALIGN(align); \ 3744af57b78STim Abbott *(.data..cacheline_aligned) 375ef53dae8SSam Ravnborg 37639a449d9STim Abbott #define INIT_TASK_DATA(align) \ 377ef53dae8SSam Ravnborg . = ALIGN(align); \ 378a6214385SMasahiro Yamada __start_init_task = .; \ 379a6214385SMasahiro Yamada init_thread_union = .; \ 380a6214385SMasahiro Yamada init_stack = .; \ 381266ff2a8SNicholas Piggin KEEP(*(.data..init_task)) \ 382266ff2a8SNicholas Piggin KEEP(*(.data..init_thread_info)) \ 383a6214385SMasahiro Yamada . = __start_init_task + THREAD_SIZE; \ 384a6214385SMasahiro Yamada __end_init_task = .; 385ef53dae8SSam Ravnborg 386e872267bSArd Biesheuvel #define JUMP_TABLE_DATA \ 387e872267bSArd Biesheuvel . = ALIGN(8); \ 388e872267bSArd Biesheuvel __start___jump_table = .; \ 389e872267bSArd Biesheuvel KEEP(*(__jump_table)) \ 390e872267bSArd Biesheuvel __stop___jump_table = .; 391e872267bSArd Biesheuvel 3929183c3f9SJosh Poimboeuf #define STATIC_CALL_DATA \ 3939183c3f9SJosh Poimboeuf . = ALIGN(8); \ 3949183c3f9SJosh Poimboeuf __start_static_call_sites = .; \ 3959183c3f9SJosh Poimboeuf KEEP(*(.static_call_sites)) \ 3969183c3f9SJosh Poimboeuf __stop_static_call_sites = .; 3979183c3f9SJosh Poimboeuf 398ef53dae8SSam Ravnborg /* 39932fb2fc5SHeiko Carstens * Allow architectures to handle ro_after_init data on their 40032fb2fc5SHeiko Carstens * own by defining an empty RO_AFTER_INIT_DATA. 40132fb2fc5SHeiko Carstens */ 40232fb2fc5SHeiko Carstens #ifndef RO_AFTER_INIT_DATA 403d7c19b06SJakub Kicinski #define RO_AFTER_INIT_DATA \ 4047f897acbSRomain Naour . = ALIGN(8); \ 405a6214385SMasahiro Yamada __start_ro_after_init = .; \ 406d7c19b06SJakub Kicinski *(.data..ro_after_init) \ 407e872267bSArd Biesheuvel JUMP_TABLE_DATA \ 4089183c3f9SJosh Poimboeuf STATIC_CALL_DATA \ 409a6214385SMasahiro Yamada __end_ro_after_init = .; 41032fb2fc5SHeiko Carstens #endif 41132fb2fc5SHeiko Carstens 41232fb2fc5SHeiko Carstens /* 413ef53dae8SSam Ravnborg * Read only Data 414ef53dae8SSam Ravnborg */ 41593240b32SKees Cook #define RO_DATA(align) \ 4164096b46fSSam Ravnborg . = ALIGN((align)); \ 4171da177e4SLinus Torvalds .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 418a6214385SMasahiro Yamada __start_rodata = .; \ 4191da177e4SLinus Torvalds *(.rodata) *(.rodata.*) \ 420590d6979SSteven Rostedt (VMware) SCHED_DATA \ 42132fb2fc5SHeiko Carstens RO_AFTER_INIT_DATA /* Read only after init */ \ 42265498646SMathieu Desnoyers . = ALIGN(8); \ 423a6214385SMasahiro Yamada __start___tracepoints_ptrs = .; \ 4244b89b7f7SNicholas Piggin KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ 425a6214385SMasahiro Yamada __stop___tracepoints_ptrs = .; \ 42697e1c18eSMathieu Desnoyers *(__tracepoints_strings)/* Tracepoints: strings */ \ 4271da177e4SLinus Torvalds } \ 4281da177e4SLinus Torvalds \ 4291da177e4SLinus Torvalds .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 4301da177e4SLinus Torvalds *(.rodata1) \ 4311da177e4SLinus Torvalds } \ 4321da177e4SLinus Torvalds \ 4331da177e4SLinus Torvalds /* PCI quirks */ \ 4341da177e4SLinus Torvalds .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 435a6214385SMasahiro Yamada __start_pci_fixups_early = .; \ 4364b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_early)) \ 437a6214385SMasahiro Yamada __end_pci_fixups_early = .; \ 438a6214385SMasahiro Yamada __start_pci_fixups_header = .; \ 4394b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_header)) \ 440a6214385SMasahiro Yamada __end_pci_fixups_header = .; \ 441a6214385SMasahiro Yamada __start_pci_fixups_final = .; \ 4424b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_final)) \ 443a6214385SMasahiro Yamada __end_pci_fixups_final = .; \ 444a6214385SMasahiro Yamada __start_pci_fixups_enable = .; \ 4454b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_enable)) \ 446a6214385SMasahiro Yamada __end_pci_fixups_enable = .; \ 447a6214385SMasahiro Yamada __start_pci_fixups_resume = .; \ 4484b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_resume)) \ 449a6214385SMasahiro Yamada __end_pci_fixups_resume = .; \ 450a6214385SMasahiro Yamada __start_pci_fixups_resume_early = .; \ 4514b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_resume_early)) \ 452a6214385SMasahiro Yamada __end_pci_fixups_resume_early = .; \ 453a6214385SMasahiro Yamada __start_pci_fixups_suspend = .; \ 4544b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_suspend)) \ 455a6214385SMasahiro Yamada __end_pci_fixups_suspend = .; \ 456a6214385SMasahiro Yamada __start_pci_fixups_suspend_late = .; \ 4574b89b7f7SNicholas Piggin KEEP(*(.pci_fixup_suspend_late)) \ 458a6214385SMasahiro Yamada __end_pci_fixups_suspend_late = .; \ 4591da177e4SLinus Torvalds } \ 4601da177e4SLinus Torvalds \ 4615658c769SDavid Woodhouse /* Built-in firmware blobs */ \ 4625658c769SDavid Woodhouse .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 463a6214385SMasahiro Yamada __start_builtin_fw = .; \ 4644b89b7f7SNicholas Piggin KEEP(*(.builtin_fw)) \ 465a6214385SMasahiro Yamada __end_builtin_fw = .; \ 4665658c769SDavid Woodhouse } \ 4675658c769SDavid Woodhouse \ 46863687a52SJan Beulich TRACEDATA \ 46963687a52SJan Beulich \ 4701da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 4711da177e4SLinus Torvalds __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 472a6214385SMasahiro Yamada __start___ksymtab = .; \ 473b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab+*))) \ 474a6214385SMasahiro Yamada __stop___ksymtab = .; \ 4751da177e4SLinus Torvalds } \ 4761da177e4SLinus Torvalds \ 4771da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 4781da177e4SLinus Torvalds __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 479a6214385SMasahiro Yamada __start___ksymtab_gpl = .; \ 480b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab_gpl+*))) \ 481a6214385SMasahiro Yamada __stop___ksymtab_gpl = .; \ 4821da177e4SLinus Torvalds } \ 4831da177e4SLinus Torvalds \ 484f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 485f71d20e9SArjan van de Ven __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 486a6214385SMasahiro Yamada __start___ksymtab_unused = .; \ 487b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab_unused+*))) \ 488a6214385SMasahiro Yamada __stop___ksymtab_unused = .; \ 489f71d20e9SArjan van de Ven } \ 490f71d20e9SArjan van de Ven \ 491f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 492f71d20e9SArjan van de Ven __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 493a6214385SMasahiro Yamada __start___ksymtab_unused_gpl = .; \ 494b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ 495a6214385SMasahiro Yamada __stop___ksymtab_unused_gpl = .; \ 496f71d20e9SArjan van de Ven } \ 497f71d20e9SArjan van de Ven \ 4989f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 4999f28bb7eSGreg Kroah-Hartman __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 500a6214385SMasahiro Yamada __start___ksymtab_gpl_future = .; \ 501b67067f1SNicholas Piggin KEEP(*(SORT(___ksymtab_gpl_future+*))) \ 502a6214385SMasahiro Yamada __stop___ksymtab_gpl_future = .; \ 5039f28bb7eSGreg Kroah-Hartman } \ 5049f28bb7eSGreg Kroah-Hartman \ 5051da177e4SLinus Torvalds /* Kernel symbol table: Normal symbols */ \ 5061da177e4SLinus Torvalds __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 507a6214385SMasahiro Yamada __start___kcrctab = .; \ 508b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab+*))) \ 509a6214385SMasahiro Yamada __stop___kcrctab = .; \ 5101da177e4SLinus Torvalds } \ 5111da177e4SLinus Torvalds \ 5121da177e4SLinus Torvalds /* Kernel symbol table: GPL-only symbols */ \ 5131da177e4SLinus Torvalds __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 514a6214385SMasahiro Yamada __start___kcrctab_gpl = .; \ 515b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab_gpl+*))) \ 516a6214385SMasahiro Yamada __stop___kcrctab_gpl = .; \ 5171da177e4SLinus Torvalds } \ 5181da177e4SLinus Torvalds \ 519f71d20e9SArjan van de Ven /* Kernel symbol table: Normal unused symbols */ \ 520f71d20e9SArjan van de Ven __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 521a6214385SMasahiro Yamada __start___kcrctab_unused = .; \ 522b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab_unused+*))) \ 523a6214385SMasahiro Yamada __stop___kcrctab_unused = .; \ 524f71d20e9SArjan van de Ven } \ 525f71d20e9SArjan van de Ven \ 526f71d20e9SArjan van de Ven /* Kernel symbol table: GPL-only unused symbols */ \ 527f71d20e9SArjan van de Ven __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 528a6214385SMasahiro Yamada __start___kcrctab_unused_gpl = .; \ 529b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ 530a6214385SMasahiro Yamada __stop___kcrctab_unused_gpl = .; \ 531f71d20e9SArjan van de Ven } \ 532f71d20e9SArjan van de Ven \ 5339f28bb7eSGreg Kroah-Hartman /* Kernel symbol table: GPL-future-only symbols */ \ 5349f28bb7eSGreg Kroah-Hartman __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 535a6214385SMasahiro Yamada __start___kcrctab_gpl_future = .; \ 536b67067f1SNicholas Piggin KEEP(*(SORT(___kcrctab_gpl_future+*))) \ 537a6214385SMasahiro Yamada __stop___kcrctab_gpl_future = .; \ 5389f28bb7eSGreg Kroah-Hartman } \ 5399f28bb7eSGreg Kroah-Hartman \ 5401da177e4SLinus Torvalds /* Kernel symbol table: strings */ \ 5411da177e4SLinus Torvalds __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 5424b89b7f7SNicholas Piggin *(__ksymtab_strings) \ 5431da177e4SLinus Torvalds } \ 5441da177e4SLinus Torvalds \ 545eb8f6890SSam Ravnborg /* __*init sections */ \ 546eb8f6890SSam Ravnborg __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 547312b1485SSam Ravnborg *(.ref.rodata) \ 548eb8f6890SSam Ravnborg MEM_KEEP(init.rodata) \ 549eb8f6890SSam Ravnborg MEM_KEEP(exit.rodata) \ 550eb8f6890SSam Ravnborg } \ 551eb8f6890SSam Ravnborg \ 5521da177e4SLinus Torvalds /* Built-in module parameters. */ \ 5531da177e4SLinus Torvalds __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 554a6214385SMasahiro Yamada __start___param = .; \ 5554b89b7f7SNicholas Piggin KEEP(*(__param)) \ 556a6214385SMasahiro Yamada __stop___param = .; \ 557e94965edSDmitry Torokhov } \ 558e94965edSDmitry Torokhov \ 559e94965edSDmitry Torokhov /* Built-in module versions. */ \ 560e94965edSDmitry Torokhov __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 561a6214385SMasahiro Yamada __start___modver = .; \ 5624b89b7f7SNicholas Piggin KEEP(*(__modver)) \ 563a6214385SMasahiro Yamada __stop___modver = .; \ 5647583ddfdSMarcelo Tosatti } \ 565eaf93707SKees Cook \ 566b8c2f776SKees Cook RO_EXCEPTION_TABLE \ 567eaf93707SKees Cook NOTES \ 56890ceddcbSFangrui Song BTF \ 569eaf93707SKees Cook \ 570eaf93707SKees Cook . = ALIGN((align)); \ 571eaf93707SKees Cook __end_rodata = .; 5721da177e4SLinus Torvalds 573cb87481eSNicholas Piggin /* 57465538966SThomas Gleixner * Non-instrumentable text section 57565538966SThomas Gleixner */ 57665538966SThomas Gleixner #define NOINSTR_TEXT \ 57765538966SThomas Gleixner ALIGN_FUNCTION(); \ 57865538966SThomas Gleixner __noinstr_text_start = .; \ 57965538966SThomas Gleixner *(.noinstr.text) \ 58065538966SThomas Gleixner __noinstr_text_end = .; 58165538966SThomas Gleixner 58265538966SThomas Gleixner /* 583cb87481eSNicholas Piggin * .text section. Map to function alignment to avoid address changes 5840f4c4af0SNicholas Piggin * during second ld run in second ld pass when generating System.map 585cb87481eSNicholas Piggin * 586cb87481eSNicholas Piggin * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead 587cb87481eSNicholas Piggin * code elimination is enabled, so these sections should be converted 588cb87481eSNicholas Piggin * to use ".." first. 589cb87481eSNicholas Piggin */ 5907664709bSSam Ravnborg #define TEXT_TEXT \ 5917664709bSSam Ravnborg ALIGN_FUNCTION(); \ 592eff8728fSNick Desaulniers *(.text.hot .text.hot.*) \ 593eff8728fSNick Desaulniers *(TEXT_MAIN .text.fixup) \ 594eff8728fSNick Desaulniers *(.text.unlikely .text.unlikely.*) \ 595eff8728fSNick Desaulniers *(.text.unknown .text.unknown.*) \ 59665538966SThomas Gleixner NOINSTR_TEXT \ 597564c9cc8SKees Cook *(.text..refcount) \ 598312b1485SSam Ravnborg *(.ref.text) \ 599266ff2a8SNicholas Piggin MEM_KEEP(init.text*) \ 600266ff2a8SNicholas Piggin MEM_KEEP(exit.text*) \ 601eb8f6890SSam Ravnborg 6027664709bSSam Ravnborg 6036d30e3a8SSam Ravnborg /* sched.text is aling to function alignment to secure we have same 6046d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 6051da177e4SLinus Torvalds #define SCHED_TEXT \ 6066d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 607a6214385SMasahiro Yamada __sched_text_start = .; \ 6081da177e4SLinus Torvalds *(.sched.text) \ 609a6214385SMasahiro Yamada __sched_text_end = .; 6101da177e4SLinus Torvalds 6116d30e3a8SSam Ravnborg /* spinlock.text is aling to function alignment to secure we have same 6126d30e3a8SSam Ravnborg * address even at second ld pass when generating System.map */ 6131da177e4SLinus Torvalds #define LOCK_TEXT \ 6146d30e3a8SSam Ravnborg ALIGN_FUNCTION(); \ 615a6214385SMasahiro Yamada __lock_text_start = .; \ 6161da177e4SLinus Torvalds *(.spinlock.text) \ 617a6214385SMasahiro Yamada __lock_text_end = .; 618d0aaff97SPrasanna S Panchamukhi 6196727ad9eSChris Metcalf #define CPUIDLE_TEXT \ 6206727ad9eSChris Metcalf ALIGN_FUNCTION(); \ 621a6214385SMasahiro Yamada __cpuidle_text_start = .; \ 6226727ad9eSChris Metcalf *(.cpuidle.text) \ 623a6214385SMasahiro Yamada __cpuidle_text_end = .; 6246727ad9eSChris Metcalf 625d0aaff97SPrasanna S Panchamukhi #define KPROBES_TEXT \ 626d0aaff97SPrasanna S Panchamukhi ALIGN_FUNCTION(); \ 627a6214385SMasahiro Yamada __kprobes_text_start = .; \ 628d0aaff97SPrasanna S Panchamukhi *(.kprobes.text) \ 629a6214385SMasahiro Yamada __kprobes_text_end = .; 630a7d0c210SPaolo 'Blaisorblade' Giarrusso 631ea714547SJiri Olsa #define ENTRY_TEXT \ 632ea714547SJiri Olsa ALIGN_FUNCTION(); \ 633a6214385SMasahiro Yamada __entry_text_start = .; \ 634ea714547SJiri Olsa *(.entry.text) \ 635a6214385SMasahiro Yamada __entry_text_end = .; 636ea714547SJiri Olsa 637a0343e82SFrederic Weisbecker #define IRQENTRY_TEXT \ 638a0343e82SFrederic Weisbecker ALIGN_FUNCTION(); \ 639a6214385SMasahiro Yamada __irqentry_text_start = .; \ 640a0343e82SFrederic Weisbecker *(.irqentry.text) \ 641a6214385SMasahiro Yamada __irqentry_text_end = .; 642a0343e82SFrederic Weisbecker 643be7635e7SAlexander Potapenko #define SOFTIRQENTRY_TEXT \ 644be7635e7SAlexander Potapenko ALIGN_FUNCTION(); \ 645a6214385SMasahiro Yamada __softirqentry_text_start = .; \ 646be7635e7SAlexander Potapenko *(.softirqentry.text) \ 647a6214385SMasahiro Yamada __softirqentry_text_end = .; 648be7635e7SAlexander Potapenko 6491e7e4788SJosh Poimboeuf #define STATIC_CALL_TEXT \ 6501e7e4788SJosh Poimboeuf ALIGN_FUNCTION(); \ 6511e7e4788SJosh Poimboeuf __static_call_text_start = .; \ 6521e7e4788SJosh Poimboeuf *(.static_call.text) \ 6531e7e4788SJosh Poimboeuf __static_call_text_end = .; 6541e7e4788SJosh Poimboeuf 65537c514e3SSam Ravnborg /* Section used for early init (in .S files) */ 656266ff2a8SNicholas Piggin #define HEAD_TEXT KEEP(*(.head.text)) 65737c514e3SSam Ravnborg 6587923f90fSSam Ravnborg #define HEAD_TEXT_SECTION \ 659ef53dae8SSam Ravnborg .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 660ef53dae8SSam Ravnborg HEAD_TEXT \ 661ef53dae8SSam Ravnborg } 662ef53dae8SSam Ravnborg 663ef53dae8SSam Ravnborg /* 664ef53dae8SSam Ravnborg * Exception table 665ef53dae8SSam Ravnborg */ 666ef53dae8SSam Ravnborg #define EXCEPTION_TABLE(align) \ 667ef53dae8SSam Ravnborg . = ALIGN(align); \ 668ef53dae8SSam Ravnborg __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 669a6214385SMasahiro Yamada __start___ex_table = .; \ 6704b89b7f7SNicholas Piggin KEEP(*(__ex_table)) \ 671a6214385SMasahiro Yamada __stop___ex_table = .; \ 672ef53dae8SSam Ravnborg } 673ef53dae8SSam Ravnborg 674ef53dae8SSam Ravnborg /* 67590ceddcbSFangrui Song * .BTF 67690ceddcbSFangrui Song */ 67790ceddcbSFangrui Song #ifdef CONFIG_DEBUG_INFO_BTF 67890ceddcbSFangrui Song #define BTF \ 67990ceddcbSFangrui Song .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 68090ceddcbSFangrui Song __start_BTF = .; \ 68165c20439STony Ambardar KEEP(*(.BTF)) \ 68290ceddcbSFangrui Song __stop_BTF = .; \ 6835a2798abSJiri Olsa } \ 6845a2798abSJiri Olsa . = ALIGN(4); \ 6855a2798abSJiri Olsa .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 6865a2798abSJiri Olsa *(.BTF_ids) \ 68790ceddcbSFangrui Song } 68890ceddcbSFangrui Song #else 68990ceddcbSFangrui Song #define BTF 69090ceddcbSFangrui Song #endif 69190ceddcbSFangrui Song 69290ceddcbSFangrui Song /* 693ef53dae8SSam Ravnborg * Init task 694ef53dae8SSam Ravnborg */ 69539a449d9STim Abbott #define INIT_TASK_DATA_SECTION(align) \ 696ef53dae8SSam Ravnborg . = ALIGN(align); \ 697da5e37efSSam Ravnborg .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 69839a449d9STim Abbott INIT_TASK_DATA(align) \ 699ef53dae8SSam Ravnborg } 700eb8f6890SSam Ravnborg 701b99b87f7SPeter Oberparleiter #ifdef CONFIG_CONSTRUCTORS 7022a2325e6SHeiko Carstens #define KERNEL_CTORS() . = ALIGN(8); \ 703a6214385SMasahiro Yamada __ctors_start = .; \ 7043e663148SKees Cook KEEP(*(SORT(.ctors.*))) \ 7054b89b7f7SNicholas Piggin KEEP(*(.ctors)) \ 7064b89b7f7SNicholas Piggin KEEP(*(SORT(.init_array.*))) \ 7074b89b7f7SNicholas Piggin KEEP(*(.init_array)) \ 708a6214385SMasahiro Yamada __ctors_end = .; 709b99b87f7SPeter Oberparleiter #else 710b99b87f7SPeter Oberparleiter #define KERNEL_CTORS() 711b99b87f7SPeter Oberparleiter #endif 712b99b87f7SPeter Oberparleiter 71301ba2bdcSSam Ravnborg /* init and exit section handling */ 714eb8f6890SSam Ravnborg #define INIT_DATA \ 715b67067f1SNicholas Piggin KEEP(*(SORT(___kentry+*))) \ 716266ff2a8SNicholas Piggin *(.init.data init.data.*) \ 717266ff2a8SNicholas Piggin MEM_DISCARD(init.data*) \ 718b99b87f7SPeter Oberparleiter KERNEL_CTORS() \ 7194b3b4c5eSJohn Reiser MCOUNT_REC() \ 720266ff2a8SNicholas Piggin *(.init.rodata .init.rodata.*) \ 721e4a9ea5eSSteven Rostedt FTRACE_EVENTS() \ 7223d56e331SSteven Rostedt TRACE_SYSCALLS() \ 723376e2424SMasami Hiramatsu KPROBE_BLACKLIST() \ 724540adea3SMasami Hiramatsu ERROR_INJECT_WHITELIST() \ 725aab94339SDirk Brandewie MEM_DISCARD(init.rodata) \ 726f2f6c255SPrashant Gaikwad CLK_OF_TABLES() \ 727f618c470SMarek Szyprowski RESERVEDMEM_OF_TABLES() \ 7282fcc112aSDaniel Lezcano TIMER_OF_TABLES() \ 7296c3ff8b1SStephen Boyd CPU_METHOD_OF_TABLES() \ 730449e056cSDaniel Lezcano CPUIDLE_METHOD_OF_TABLES() \ 731f6e916b8SThomas Petazzoni KERNEL_DTB() \ 732b0b6abd3SRob Herring IRQCHIP_OF_MATCH_TABLE() \ 73346e589a3SMarc Zyngier ACPI_PROBE_TABLE(irqchip) \ 7342fcc112aSDaniel Lezcano ACPI_PROBE_TABLE(timer) \ 735980af75eSDaniel Lezcano THERMAL_TABLE(governor) \ 7363ac946d1SKees Cook EARLYCON_TABLE() \ 737e6b1db98SMatthew Garrett LSM_TABLE() \ 73890a025a8SBrendan Higgins EARLY_LSM_TABLE() \ 73990a025a8SBrendan Higgins KUNIT_TABLE() 74001ba2bdcSSam Ravnborg 741eb8f6890SSam Ravnborg #define INIT_TEXT \ 742266ff2a8SNicholas Piggin *(.init.text .init.text.*) \ 743e41f501dSDmitry Vyukov *(.text.startup) \ 744266ff2a8SNicholas Piggin MEM_DISCARD(init.text*) 745eb8f6890SSam Ravnborg 746eb8f6890SSam Ravnborg #define EXIT_DATA \ 747266ff2a8SNicholas Piggin *(.exit.data .exit.data.*) \ 7488dcf86caSPeter Oberparleiter *(.fini_array .fini_array.*) \ 7498dcf86caSPeter Oberparleiter *(.dtors .dtors.*) \ 750266ff2a8SNicholas Piggin MEM_DISCARD(exit.data*) \ 751266ff2a8SNicholas Piggin MEM_DISCARD(exit.rodata*) 752eb8f6890SSam Ravnborg 753eb8f6890SSam Ravnborg #define EXIT_TEXT \ 754eb8f6890SSam Ravnborg *(.exit.text) \ 755e41f501dSDmitry Vyukov *(.text.exit) \ 756eb8f6890SSam Ravnborg MEM_DISCARD(exit.text) 75701ba2bdcSSam Ravnborg 7587923f90fSSam Ravnborg #define EXIT_CALL \ 7597923f90fSSam Ravnborg *(.exitcall.exit) 7607923f90fSSam Ravnborg 761ef53dae8SSam Ravnborg /* 762ef53dae8SSam Ravnborg * bss (Block Started by Symbol) - uninitialized data 763ef53dae8SSam Ravnborg * zeroed during startup 764ef53dae8SSam Ravnborg */ 76504e448d9STim Abbott #define SBSS(sbss_align) \ 76604e448d9STim Abbott . = ALIGN(sbss_align); \ 767ef53dae8SSam Ravnborg .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 76883a092cfSNicholas Piggin *(.dynsbss) \ 769266ff2a8SNicholas Piggin *(SBSS_MAIN) \ 770ef53dae8SSam Ravnborg *(.scommon) \ 771ef53dae8SSam Ravnborg } 772ef53dae8SSam Ravnborg 773c87728caSDavid Daney /* 774c87728caSDavid Daney * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 775c87728caSDavid Daney * sections to the front of bss. 776c87728caSDavid Daney */ 777c87728caSDavid Daney #ifndef BSS_FIRST_SECTIONS 778c87728caSDavid Daney #define BSS_FIRST_SECTIONS 779c87728caSDavid Daney #endif 780c87728caSDavid Daney 781ef53dae8SSam Ravnborg #define BSS(bss_align) \ 782ef53dae8SSam Ravnborg . = ALIGN(bss_align); \ 783ef53dae8SSam Ravnborg .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 784c87728caSDavid Daney BSS_FIRST_SECTIONS \ 785de2b41beSJoerg Roedel . = ALIGN(PAGE_SIZE); \ 7867c74df07STim Abbott *(.bss..page_aligned) \ 787de2b41beSJoerg Roedel . = ALIGN(PAGE_SIZE); \ 788ef53dae8SSam Ravnborg *(.dynbss) \ 789cb87481eSNicholas Piggin *(BSS_MAIN) \ 790ef53dae8SSam Ravnborg *(COMMON) \ 791ef53dae8SSam Ravnborg } 792ef53dae8SSam Ravnborg 793ef53dae8SSam Ravnborg /* 794ef53dae8SSam Ravnborg * DWARF debug sections. 795ef53dae8SSam Ravnborg * Symbols in the DWARF debugging sections are relative to 796ef53dae8SSam Ravnborg * the beginning of the section so we begin them at 0. 797ef53dae8SSam Ravnborg */ 798a7d0c210SPaolo 'Blaisorblade' Giarrusso #define DWARF_DEBUG \ 799a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1 */ \ 800a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug 0 : { *(.debug) } \ 801a7d0c210SPaolo 'Blaisorblade' Giarrusso .line 0 : { *(.line) } \ 802a7d0c210SPaolo 'Blaisorblade' Giarrusso /* GNU DWARF 1 extensions */ \ 803a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 804a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_sfnames 0 : { *(.debug_sfnames) } \ 805a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 1.1 and DWARF 2 */ \ 806a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_aranges 0 : { *(.debug_aranges) } \ 807a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_pubnames 0 : { *(.debug_pubnames) } \ 808a7d0c210SPaolo 'Blaisorblade' Giarrusso /* DWARF 2 */ \ 809a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_info 0 : { *(.debug_info \ 810a7d0c210SPaolo 'Blaisorblade' Giarrusso .gnu.linkonce.wi.*) } \ 811a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_abbrev 0 : { *(.debug_abbrev) } \ 812a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_line 0 : { *(.debug_line) } \ 813a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_frame 0 : { *(.debug_frame) } \ 814a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_str 0 : { *(.debug_str) } \ 815a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_loc 0 : { *(.debug_loc) } \ 816a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_macinfo 0 : { *(.debug_macinfo) } \ 81783a092cfSNicholas Piggin .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 81883a092cfSNicholas Piggin /* DWARF 3 */ \ 81983a092cfSNicholas Piggin .debug_ranges 0 : { *(.debug_ranges) } \ 820a7d0c210SPaolo 'Blaisorblade' Giarrusso /* SGI/MIPS DWARF 2 extensions */ \ 821a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_weaknames 0 : { *(.debug_weaknames) } \ 822a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_funcnames 0 : { *(.debug_funcnames) } \ 823a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_typenames 0 : { *(.debug_typenames) } \ 824a7d0c210SPaolo 'Blaisorblade' Giarrusso .debug_varnames 0 : { *(.debug_varnames) } \ 82583a092cfSNicholas Piggin /* GNU DWARF 2 extensions */ \ 82683a092cfSNicholas Piggin .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 82783a092cfSNicholas Piggin .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 82883a092cfSNicholas Piggin /* DWARF 4 */ \ 82983a092cfSNicholas Piggin .debug_types 0 : { *(.debug_types) } \ 83083a092cfSNicholas Piggin /* DWARF 5 */ \ 83183a092cfSNicholas Piggin .debug_macro 0 : { *(.debug_macro) } \ 83283a092cfSNicholas Piggin .debug_addr 0 : { *(.debug_addr) } 833a7d0c210SPaolo 'Blaisorblade' Giarrusso 834a7d0c210SPaolo 'Blaisorblade' Giarrusso /* Stabs debugging sections. */ 835a7d0c210SPaolo 'Blaisorblade' Giarrusso #define STABS_DEBUG \ 836a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab 0 : { *(.stab) } \ 837a7d0c210SPaolo 'Blaisorblade' Giarrusso .stabstr 0 : { *(.stabstr) } \ 838a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.excl 0 : { *(.stab.excl) } \ 839a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.exclstr 0 : { *(.stab.exclstr) } \ 840a7d0c210SPaolo 'Blaisorblade' Giarrusso .stab.index 0 : { *(.stab.index) } \ 841c604abc3SKees Cook .stab.indexstr 0 : { *(.stab.indexstr) } 842c604abc3SKees Cook 843c604abc3SKees Cook /* Required sections not related to debugging. */ 844c604abc3SKees Cook #define ELF_DETAILS \ 845a840c4deSKees Cook .comment 0 : { *(.comment) } \ 846a840c4deSKees Cook .symtab 0 : { *(.symtab) } \ 847a840c4deSKees Cook .strtab 0 : { *(.strtab) } \ 848a840c4deSKees Cook .shstrtab 0 : { *(.shstrtab) } 8499c9b8b38SJeremy Fitzhardinge 8506360b1fbSJan Beulich #ifdef CONFIG_GENERIC_BUG 8517664c5a1SJeremy Fitzhardinge #define BUG_TABLE \ 8527664c5a1SJeremy Fitzhardinge . = ALIGN(8); \ 8537664c5a1SJeremy Fitzhardinge __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 854a6214385SMasahiro Yamada __start___bug_table = .; \ 8554b89b7f7SNicholas Piggin KEEP(*(__bug_table)) \ 856a6214385SMasahiro Yamada __stop___bug_table = .; \ 8577664c5a1SJeremy Fitzhardinge } 8586360b1fbSJan Beulich #else 8596360b1fbSJan Beulich #define BUG_TABLE 8606360b1fbSJan Beulich #endif 8617664c5a1SJeremy Fitzhardinge 86211af8474SJosh Poimboeuf #ifdef CONFIG_UNWINDER_ORC 863ee9f8fceSJosh Poimboeuf #define ORC_UNWIND_TABLE \ 864ee9f8fceSJosh Poimboeuf . = ALIGN(4); \ 865ee9f8fceSJosh Poimboeuf .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 866a6214385SMasahiro Yamada __start_orc_unwind_ip = .; \ 867ee9f8fceSJosh Poimboeuf KEEP(*(.orc_unwind_ip)) \ 868a6214385SMasahiro Yamada __stop_orc_unwind_ip = .; \ 869ee9f8fceSJosh Poimboeuf } \ 870f76a16adSJosh Poimboeuf . = ALIGN(2); \ 871ee9f8fceSJosh Poimboeuf .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 872a6214385SMasahiro Yamada __start_orc_unwind = .; \ 873ee9f8fceSJosh Poimboeuf KEEP(*(.orc_unwind)) \ 874a6214385SMasahiro Yamada __stop_orc_unwind = .; \ 875ee9f8fceSJosh Poimboeuf } \ 876ee9f8fceSJosh Poimboeuf . = ALIGN(4); \ 877ee9f8fceSJosh Poimboeuf .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 878a6214385SMasahiro Yamada orc_lookup = .; \ 879ee9f8fceSJosh Poimboeuf . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \ 880ee9f8fceSJosh Poimboeuf LOOKUP_BLOCK_SIZE) + 1) * 4; \ 881a6214385SMasahiro Yamada orc_lookup_end = .; \ 882ee9f8fceSJosh Poimboeuf } 883ee9f8fceSJosh Poimboeuf #else 884ee9f8fceSJosh Poimboeuf #define ORC_UNWIND_TABLE 885ee9f8fceSJosh Poimboeuf #endif 886ee9f8fceSJosh Poimboeuf 88763687a52SJan Beulich #ifdef CONFIG_PM_TRACE 88863687a52SJan Beulich #define TRACEDATA \ 88963687a52SJan Beulich . = ALIGN(4); \ 89063687a52SJan Beulich .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 891a6214385SMasahiro Yamada __tracedata_start = .; \ 8924b89b7f7SNicholas Piggin KEEP(*(.tracedata)) \ 893a6214385SMasahiro Yamada __tracedata_end = .; \ 89463687a52SJan Beulich } 89563687a52SJan Beulich #else 89663687a52SJan Beulich #define TRACEDATA 89763687a52SJan Beulich #endif 89863687a52SJan Beulich 8999c9b8b38SJeremy Fitzhardinge #define NOTES \ 900cbe87121SRoland McGrath .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 901a6214385SMasahiro Yamada __start_notes = .; \ 902266ff2a8SNicholas Piggin KEEP(*(.note.*)) \ 903a6214385SMasahiro Yamada __stop_notes = .; \ 904fbe6a8e6SKees Cook } NOTES_HEADERS \ 905fbe6a8e6SKees Cook NOTES_HEADERS_RESTORE 90661ce1efeSAndrew Morton 907ef53dae8SSam Ravnborg #define INIT_SETUP(initsetup_align) \ 908ef53dae8SSam Ravnborg . = ALIGN(initsetup_align); \ 909a6214385SMasahiro Yamada __setup_start = .; \ 9104b89b7f7SNicholas Piggin KEEP(*(.init.setup)) \ 911a6214385SMasahiro Yamada __setup_end = .; 912ef53dae8SSam Ravnborg 913026cee00SPawel Moll #define INIT_CALLS_LEVEL(level) \ 914a6214385SMasahiro Yamada __initcall##level##_start = .; \ 915b67067f1SNicholas Piggin KEEP(*(.initcall##level##.init)) \ 916b67067f1SNicholas Piggin KEEP(*(.initcall##level##s.init)) \ 91761ce1efeSAndrew Morton 918ef53dae8SSam Ravnborg #define INIT_CALLS \ 919a6214385SMasahiro Yamada __initcall_start = .; \ 920b67067f1SNicholas Piggin KEEP(*(.initcallearly.init)) \ 921026cee00SPawel Moll INIT_CALLS_LEVEL(0) \ 922026cee00SPawel Moll INIT_CALLS_LEVEL(1) \ 923026cee00SPawel Moll INIT_CALLS_LEVEL(2) \ 924026cee00SPawel Moll INIT_CALLS_LEVEL(3) \ 925026cee00SPawel Moll INIT_CALLS_LEVEL(4) \ 926026cee00SPawel Moll INIT_CALLS_LEVEL(5) \ 927026cee00SPawel Moll INIT_CALLS_LEVEL(rootfs) \ 928026cee00SPawel Moll INIT_CALLS_LEVEL(6) \ 929026cee00SPawel Moll INIT_CALLS_LEVEL(7) \ 930a6214385SMasahiro Yamada __initcall_end = .; 931ef53dae8SSam Ravnborg 932ef53dae8SSam Ravnborg #define CON_INITCALL \ 933a6214385SMasahiro Yamada __con_initcall_start = .; \ 934b67067f1SNicholas Piggin KEEP(*(.con_initcall.init)) \ 935a6214385SMasahiro Yamada __con_initcall_end = .; 936ef53dae8SSam Ravnborg 93790a025a8SBrendan Higgins /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 93890a025a8SBrendan Higgins #define KUNIT_TABLE() \ 93990a025a8SBrendan Higgins . = ALIGN(8); \ 94090a025a8SBrendan Higgins __kunit_suites_start = .; \ 94190a025a8SBrendan Higgins KEEP(*(.kunit_test_suites)) \ 94290a025a8SBrendan Higgins __kunit_suites_end = .; 94390a025a8SBrendan Higgins 944ef53dae8SSam Ravnborg #ifdef CONFIG_BLK_DEV_INITRD 945ef53dae8SSam Ravnborg #define INIT_RAM_FS \ 946d8826262SMike Frysinger . = ALIGN(4); \ 947a6214385SMasahiro Yamada __initramfs_start = .; \ 948b67067f1SNicholas Piggin KEEP(*(.init.ramfs)) \ 949ffe8018cSHendrik Brueckner . = ALIGN(8); \ 950b67067f1SNicholas Piggin KEEP(*(.init.ramfs.info)) 951ef53dae8SSam Ravnborg #else 952eadfe219SDavid Howells #define INIT_RAM_FS 953ef53dae8SSam Ravnborg #endif 954ef53dae8SSam Ravnborg 955023bf6f1STejun Heo /* 956ac26963aSBrijesh Singh * Memory encryption operates on a page basis. Since we need to clear 957ac26963aSBrijesh Singh * the memory encryption mask for this section, it needs to be aligned 958ac26963aSBrijesh Singh * on a page boundary and be a page-size multiple in length. 959ac26963aSBrijesh Singh * 960ac26963aSBrijesh Singh * Note: We use a separate section so that only this section gets 961ac26963aSBrijesh Singh * decrypted to avoid exposing more than we wish. 962ac26963aSBrijesh Singh */ 963ac26963aSBrijesh Singh #ifdef CONFIG_AMD_MEM_ENCRYPT 964ac26963aSBrijesh Singh #define PERCPU_DECRYPTED_SECTION \ 965ac26963aSBrijesh Singh . = ALIGN(PAGE_SIZE); \ 966ac26963aSBrijesh Singh *(.data..percpu..decrypted) \ 967ac26963aSBrijesh Singh . = ALIGN(PAGE_SIZE); 968ac26963aSBrijesh Singh #else 969ac26963aSBrijesh Singh #define PERCPU_DECRYPTED_SECTION 970ac26963aSBrijesh Singh #endif 971ac26963aSBrijesh Singh 972ac26963aSBrijesh Singh 973ac26963aSBrijesh Singh /* 974023bf6f1STejun Heo * Default discarded sections. 975023bf6f1STejun Heo * 976023bf6f1STejun Heo * Some archs want to discard exit text/data at runtime rather than 977023bf6f1STejun Heo * link time due to cross-section references such as alt instructions, 978023bf6f1STejun Heo * bug table, eh_frame, etc. DISCARDS must be the last of output 979023bf6f1STejun Heo * section definitions so that such archs put those in earlier section 980023bf6f1STejun Heo * definitions. 981023bf6f1STejun Heo */ 98284d5f77fSH.J. Lu #ifdef RUNTIME_DISCARD_EXIT 98384d5f77fSH.J. Lu #define EXIT_DISCARDS 98484d5f77fSH.J. Lu #else 98584d5f77fSH.J. Lu #define EXIT_DISCARDS \ 98684d5f77fSH.J. Lu EXIT_TEXT \ 98784d5f77fSH.J. Lu EXIT_DATA 98884d5f77fSH.J. Lu #endif 98984d5f77fSH.J. Lu 990d812db78SKees Cook /* 991d812db78SKees Cook * Clang's -fsanitize=kernel-address and -fsanitize=thread produce 992d812db78SKees Cook * unwanted sections (.eh_frame and .init_array.*), but 993d812db78SKees Cook * CONFIG_CONSTRUCTORS wants to keep any .init_array.* sections. 994d812db78SKees Cook * https://bugs.llvm.org/show_bug.cgi?id=46478 995d812db78SKees Cook */ 996d812db78SKees Cook #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 997d812db78SKees Cook # ifdef CONFIG_CONSTRUCTORS 998d812db78SKees Cook # define SANITIZER_DISCARDS \ 999d812db78SKees Cook *(.eh_frame) 1000d812db78SKees Cook # else 1001d812db78SKees Cook # define SANITIZER_DISCARDS \ 1002d812db78SKees Cook *(.init_array) *(.init_array.*) \ 1003d812db78SKees Cook *(.eh_frame) 1004d812db78SKees Cook # endif 1005d812db78SKees Cook #else 1006d812db78SKees Cook # define SANITIZER_DISCARDS 1007d812db78SKees Cook #endif 1008d812db78SKees Cook 100903c2b85cSKees Cook #define COMMON_DISCARDS \ 1010d812db78SKees Cook SANITIZER_DISCARDS \ 101103c2b85cSKees Cook *(.discard) \ 101203c2b85cSKees Cook *(.discard.*) \ 1013dfbe6968SKees Cook *(.modinfo) \ 1014dfbe6968SKees Cook /* ld.bfd warns about .gnu.version* even when not emitted */ \ 1015dfbe6968SKees Cook *(.gnu.version*) \ 101603c2b85cSKees Cook 1017405d967dSTejun Heo #define DISCARDS \ 1018405d967dSTejun Heo /DISCARD/ : { \ 101984d5f77fSH.J. Lu EXIT_DISCARDS \ 1020023bf6f1STejun Heo EXIT_CALL \ 102103c2b85cSKees Cook COMMON_DISCARDS \ 1022405d967dSTejun Heo } 1023405d967dSTejun Heo 10243e5d8f97STejun Heo /** 10256ea0c34dSMike Frysinger * PERCPU_INPUT - the percpu input sections 10266ea0c34dSMike Frysinger * @cacheline: cacheline size 10276ea0c34dSMike Frysinger * 10286ea0c34dSMike Frysinger * The core percpu section names and core symbols which do not rely 10296ea0c34dSMike Frysinger * directly upon load addresses. 10306ea0c34dSMike Frysinger * 10316ea0c34dSMike Frysinger * @cacheline is used to align subsections to avoid false cacheline 10326ea0c34dSMike Frysinger * sharing between subsections for different purposes. 10336ea0c34dSMike Frysinger */ 10346ea0c34dSMike Frysinger #define PERCPU_INPUT(cacheline) \ 1035a6214385SMasahiro Yamada __per_cpu_start = .; \ 10366ea0c34dSMike Frysinger *(.data..percpu..first) \ 10376ea0c34dSMike Frysinger . = ALIGN(PAGE_SIZE); \ 10386ea0c34dSMike Frysinger *(.data..percpu..page_aligned) \ 10396ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 1040330d2822SZhengyu He *(.data..percpu..read_mostly) \ 10416ea0c34dSMike Frysinger . = ALIGN(cacheline); \ 10426ea0c34dSMike Frysinger *(.data..percpu) \ 10436ea0c34dSMike Frysinger *(.data..percpu..shared_aligned) \ 1044ac26963aSBrijesh Singh PERCPU_DECRYPTED_SECTION \ 1045a6214385SMasahiro Yamada __per_cpu_end = .; 10466ea0c34dSMike Frysinger 10476ea0c34dSMike Frysinger /** 10486b7c38d5STejun Heo * PERCPU_VADDR - define output section for percpu area 104919df0c2fSTejun Heo * @cacheline: cacheline size 10503e5d8f97STejun Heo * @vaddr: explicit base address (optional) 10513e5d8f97STejun Heo * @phdr: destination PHDR (optional) 10523e5d8f97STejun Heo * 105319df0c2fSTejun Heo * Macro which expands to output section for percpu area. 105419df0c2fSTejun Heo * 105519df0c2fSTejun Heo * @cacheline is used to align subsections to avoid false cacheline 105619df0c2fSTejun Heo * sharing between subsections for different purposes. 105719df0c2fSTejun Heo * 105819df0c2fSTejun Heo * If @vaddr is not blank, it specifies explicit base address and all 105919df0c2fSTejun Heo * percpu symbols will be offset from the given address. If blank, 106019df0c2fSTejun Heo * @vaddr always equals @laddr + LOAD_OFFSET. 10613e5d8f97STejun Heo * 10623e5d8f97STejun Heo * @phdr defines the output PHDR to use if not blank. Be warned that 10633e5d8f97STejun Heo * output PHDR is sticky. If @phdr is specified, the next output 10643e5d8f97STejun Heo * section in the linker script will go there too. @phdr should have 10653e5d8f97STejun Heo * a leading colon. 10663e5d8f97STejun Heo * 10673ac6cffeSTejun Heo * Note that this macros defines __per_cpu_load as an absolute symbol. 10683ac6cffeSTejun Heo * If there is no need to put the percpu section at a predetermined 10690415b00dSTejun Heo * address, use PERCPU_SECTION. 10703e5d8f97STejun Heo */ 107119df0c2fSTejun Heo #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1072a6214385SMasahiro Yamada __per_cpu_load = .; \ 1073a6214385SMasahiro Yamada .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 10746ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 10756b7c38d5STejun Heo } phdr \ 1076a6214385SMasahiro Yamada . = __per_cpu_load + SIZEOF(.data..percpu); 10773e5d8f97STejun Heo 10783e5d8f97STejun Heo /** 10790415b00dSTejun Heo * PERCPU_SECTION - define output section for percpu area, simple version 108019df0c2fSTejun Heo * @cacheline: cacheline size 10813e5d8f97STejun Heo * 10820415b00dSTejun Heo * Align to PAGE_SIZE and outputs output section for percpu area. This 10830415b00dSTejun Heo * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 10843e5d8f97STejun Heo * __per_cpu_start will be identical. 10853ac6cffeSTejun Heo * 10860415b00dSTejun Heo * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 108719df0c2fSTejun Heo * except that __per_cpu_load is defined as a relative symbol against 108819df0c2fSTejun Heo * .data..percpu which is required for relocatable x86_32 configuration. 10893e5d8f97STejun Heo */ 10900415b00dSTejun Heo #define PERCPU_SECTION(cacheline) \ 10910415b00dSTejun Heo . = ALIGN(PAGE_SIZE); \ 10923d9a854cSDenys Vlasenko .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1093a6214385SMasahiro Yamada __per_cpu_load = .; \ 10946ea0c34dSMike Frysinger PERCPU_INPUT(cacheline) \ 10953ac6cffeSTejun Heo } 1096ef53dae8SSam Ravnborg 1097ef53dae8SSam Ravnborg 1098ef53dae8SSam Ravnborg /* 1099ef53dae8SSam Ravnborg * Definition of the high level *_SECTION macros 1100ef53dae8SSam Ravnborg * They will fit only a subset of the architectures 1101ef53dae8SSam Ravnborg */ 1102ef53dae8SSam Ravnborg 1103ef53dae8SSam Ravnborg 1104ef53dae8SSam Ravnborg /* 1105ef53dae8SSam Ravnborg * Writeable data. 1106ef53dae8SSam Ravnborg * All sections are combined in a single .data section. 1107ef53dae8SSam Ravnborg * The sections following CONSTRUCTORS are arranged so their 1108ef53dae8SSam Ravnborg * typical alignment matches. 1109ef53dae8SSam Ravnborg * A cacheline is typical/always less than a PAGE_SIZE so 1110ef53dae8SSam Ravnborg * the sections that has this restriction (or similar) 1111ef53dae8SSam Ravnborg * is located before the ones requiring PAGE_SIZE alignment. 1112ef53dae8SSam Ravnborg * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 111325985edcSLucas De Marchi * matches the requirement of PAGE_ALIGNED_DATA. 1114ef53dae8SSam Ravnborg * 11157923f90fSSam Ravnborg * use 0 as page_align if page_aligned data is not used */ 1116c9174047SKees Cook #define RW_DATA(cacheline, pagealigned, inittask) \ 1117ef53dae8SSam Ravnborg . = ALIGN(PAGE_SIZE); \ 1118ef53dae8SSam Ravnborg .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 111939a449d9STim Abbott INIT_TASK_DATA(inittask) \ 11201b208622STim Abbott NOSAVE_DATA \ 11211b208622STim Abbott PAGE_ALIGNED_DATA(pagealigned) \ 1122ef53dae8SSam Ravnborg CACHELINE_ALIGNED_DATA(cacheline) \ 1123ef53dae8SSam Ravnborg READ_MOSTLY_DATA(cacheline) \ 1124ef53dae8SSam Ravnborg DATA_DATA \ 1125ef53dae8SSam Ravnborg CONSTRUCTORS \ 112619d43626SPeter Zijlstra } \ 1127ee9f8fceSJosh Poimboeuf BUG_TABLE \ 1128ef53dae8SSam Ravnborg 1129ef53dae8SSam Ravnborg #define INIT_TEXT_SECTION(inittext_align) \ 1130ef53dae8SSam Ravnborg . = ALIGN(inittext_align); \ 1131ef53dae8SSam Ravnborg .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1132a6214385SMasahiro Yamada _sinittext = .; \ 1133ef53dae8SSam Ravnborg INIT_TEXT \ 1134a6214385SMasahiro Yamada _einittext = .; \ 1135ef53dae8SSam Ravnborg } 1136ef53dae8SSam Ravnborg 1137ef53dae8SSam Ravnborg #define INIT_DATA_SECTION(initsetup_align) \ 1138ef53dae8SSam Ravnborg .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1139ef53dae8SSam Ravnborg INIT_DATA \ 1140ef53dae8SSam Ravnborg INIT_SETUP(initsetup_align) \ 1141ef53dae8SSam Ravnborg INIT_CALLS \ 1142ef53dae8SSam Ravnborg CON_INITCALL \ 1143ef53dae8SSam Ravnborg INIT_RAM_FS \ 1144ef53dae8SSam Ravnborg } 1145ef53dae8SSam Ravnborg 114604e448d9STim Abbott #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 114704e448d9STim Abbott . = ALIGN(sbss_align); \ 1148a6214385SMasahiro Yamada __bss_start = .; \ 114904e448d9STim Abbott SBSS(sbss_align) \ 1150ef53dae8SSam Ravnborg BSS(bss_align) \ 115104e448d9STim Abbott . = ALIGN(stop_align); \ 1152a6214385SMasahiro Yamada __bss_stop = .; 1153