Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Helper macros to support writing architecture specific |
| 3 | * linker scripts. |
| 4 | * |
| 5 | * A minimal linker scripts has following content: |
| 6 | * [This is a sample, architectures may have special requiriements] |
| 7 | * |
| 8 | * OUTPUT_FORMAT(...) |
| 9 | * OUTPUT_ARCH(...) |
| 10 | * ENTRY(...) |
| 11 | * SECTIONS |
| 12 | * { |
| 13 | * . = START; |
| 14 | * __init_begin = .; |
| 15 | * HEAD_SECTION |
| 16 | * INIT_TEXT_SECTION(PAGE_SIZE) |
| 17 | * INIT_DATA_SECTION(...) |
| 18 | * PERCPU(PAGE_SIZE) |
| 19 | * __init_end = .; |
| 20 | * |
| 21 | * _stext = .; |
| 22 | * TEXT_SECTION = 0 |
| 23 | * _etext = .; |
| 24 | * |
| 25 | * _sdata = .; |
| 26 | * RO_DATA_SECTION(PAGE_SIZE) |
| 27 | * RW_DATA_SECTION(...) |
| 28 | * _edata = .; |
| 29 | * |
| 30 | * EXCEPTION_TABLE(...) |
| 31 | * NOTES |
| 32 | * |
| 33 | * __bss_start = .; |
| 34 | * BSS_SECTION(0, 0) |
| 35 | * __bss_stop = .; |
| 36 | * _end = .; |
| 37 | * |
| 38 | * /DISCARD/ : { |
| 39 | * EXIT_TEXT |
| 40 | * EXIT_DATA |
| 41 | * *(.exitcall.exit) |
| 42 | * } |
| 43 | * STABS_DEBUG |
| 44 | * DWARF_DEBUG |
| 45 | * } |
| 46 | * |
| 47 | * [__init_begin, __init_end] is the init section that may be freed after init |
| 48 | * [_stext, _etext] is the text section |
| 49 | * [_sdata, _edata] is the data section |
| 50 | * |
| 51 | * Some of the included output section have their own set of constants. |
| 52 | * Examples are: [__initramfs_start, __initramfs_end] for initramfs and |
| 53 | * [__nosave_begin, __nosave_end] for the nosave data |
| 54 | */ |
| 55 | #include <linux/section-names.h> |
Tim Abbott | c80d471 | 2009-04-25 22:10:56 -0400 | [diff] [blame] | 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #ifndef LOAD_OFFSET |
| 58 | #define LOAD_OFFSET 0 |
| 59 | #endif |
| 60 | |
| 61 | #ifndef VMLINUX_SYMBOL |
| 62 | #define VMLINUX_SYMBOL(_sym_) _sym_ |
| 63 | #endif |
| 64 | |
Sam Ravnborg | 6d30e3a | 2005-07-14 20:15:44 +0000 | [diff] [blame] | 65 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
| 66 | #define ALIGN_FUNCTION() . = ALIGN(8) |
| 67 | |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 68 | /* The actual configuration determine if the init/exit sections |
| 69 | * are handled as text/data or they can be discarded (which |
| 70 | * often happens at runtime) |
| 71 | */ |
| 72 | #ifdef CONFIG_HOTPLUG |
| 73 | #define DEV_KEEP(sec) *(.dev##sec) |
| 74 | #define DEV_DISCARD(sec) |
| 75 | #else |
| 76 | #define DEV_KEEP(sec) |
| 77 | #define DEV_DISCARD(sec) *(.dev##sec) |
| 78 | #endif |
| 79 | |
| 80 | #ifdef CONFIG_HOTPLUG_CPU |
| 81 | #define CPU_KEEP(sec) *(.cpu##sec) |
| 82 | #define CPU_DISCARD(sec) |
| 83 | #else |
| 84 | #define CPU_KEEP(sec) |
| 85 | #define CPU_DISCARD(sec) *(.cpu##sec) |
| 86 | #endif |
| 87 | |
Adrian Bunk | 1a3fb6d | 2008-01-24 22:20:18 +0100 | [diff] [blame] | 88 | #if defined(CONFIG_MEMORY_HOTPLUG) |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 89 | #define MEM_KEEP(sec) *(.mem##sec) |
| 90 | #define MEM_DISCARD(sec) |
| 91 | #else |
| 92 | #define MEM_KEEP(sec) |
| 93 | #define MEM_DISCARD(sec) *(.mem##sec) |
| 94 | #endif |
| 95 | |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 96 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| 97 | #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \ |
| 98 | *(__mcount_loc) \ |
| 99 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; |
| 100 | #else |
| 101 | #define MCOUNT_REC() |
| 102 | #endif |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 103 | |
Steven Rostedt | 2ed84ee | 2008-11-12 15:24:24 -0500 | [diff] [blame] | 104 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
Steven Rostedt | 45b7974 | 2008-11-21 00:40:40 -0500 | [diff] [blame] | 105 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
| 106 | *(_ftrace_annotated_branch) \ |
| 107 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; |
Steven Rostedt | 1f0d69a | 2008-11-12 00:14:39 -0500 | [diff] [blame] | 108 | #else |
| 109 | #define LIKELY_PROFILE() |
| 110 | #endif |
| 111 | |
Steven Rostedt | 2bcd521 | 2008-11-21 01:30:54 -0500 | [diff] [blame] | 112 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
| 113 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ |
| 114 | *(_ftrace_branch) \ |
| 115 | VMLINUX_SYMBOL(__stop_branch_profile) = .; |
| 116 | #else |
| 117 | #define BRANCH_PROFILE() |
| 118 | #endif |
| 119 | |
Steven Rostedt | b77e38a | 2009-02-24 10:21:36 -0500 | [diff] [blame] | 120 | #ifdef CONFIG_EVENT_TRACER |
| 121 | #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ |
| 122 | *(_ftrace_events) \ |
| 123 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; |
| 124 | #else |
| 125 | #define FTRACE_EVENTS() |
| 126 | #endif |
| 127 | |
Lai Jiangshan | 1ba28e0 | 2009-03-06 17:21:48 +0100 | [diff] [blame] | 128 | #ifdef CONFIG_TRACING |
| 129 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ |
| 130 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ |
| 131 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; |
| 132 | #else |
| 133 | #define TRACE_PRINTKS() |
| 134 | #endif |
| 135 | |
Frederic Weisbecker | bed1ffc | 2009-03-13 15:42:11 +0100 | [diff] [blame] | 136 | #ifdef CONFIG_FTRACE_SYSCALLS |
| 137 | #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ |
| 138 | *(__syscalls_metadata) \ |
| 139 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; |
| 140 | #else |
| 141 | #define TRACE_SYSCALLS() |
| 142 | #endif |
| 143 | |
Sam Ravnborg | ca96725 | 2007-05-17 13:38:44 +0200 | [diff] [blame] | 144 | /* .data section */ |
| 145 | #define DATA_DATA \ |
Sam Ravnborg | 0e0d314 | 2007-05-17 20:14:48 +0200 | [diff] [blame] | 146 | *(.data) \ |
Sam Ravnborg | 312b148 | 2008-01-28 20:21:15 +0100 | [diff] [blame] | 147 | *(.ref.data) \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 148 | DEV_KEEP(init.data) \ |
| 149 | DEV_KEEP(exit.data) \ |
| 150 | CPU_KEEP(init.data) \ |
| 151 | CPU_KEEP(exit.data) \ |
| 152 | MEM_KEEP(init.data) \ |
| 153 | MEM_KEEP(exit.data) \ |
Mathieu Desnoyers | 8256e47 | 2007-10-18 23:41:06 -0700 | [diff] [blame] | 154 | . = ALIGN(8); \ |
| 155 | VMLINUX_SYMBOL(__start___markers) = .; \ |
| 156 | *(__markers) \ |
Mathieu Desnoyers | 97e1c18 | 2008-07-18 12:16:16 -0400 | [diff] [blame] | 157 | VMLINUX_SYMBOL(__stop___markers) = .; \ |
Mathieu Desnoyers | 7e066fb | 2008-11-14 17:47:47 -0500 | [diff] [blame] | 158 | . = ALIGN(32); \ |
Mathieu Desnoyers | 97e1c18 | 2008-07-18 12:16:16 -0400 | [diff] [blame] | 159 | VMLINUX_SYMBOL(__start___tracepoints) = .; \ |
| 160 | *(__tracepoints) \ |
Steven Rostedt | 1f0d69a | 2008-11-12 00:14:39 -0500 | [diff] [blame] | 161 | VMLINUX_SYMBOL(__stop___tracepoints) = .; \ |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 162 | /* implement dynamic printk debug */ \ |
| 163 | . = ALIGN(8); \ |
| 164 | VMLINUX_SYMBOL(__start___verbose) = .; \ |
| 165 | *(__verbose) \ |
| 166 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
Steven Rostedt | 2bcd521 | 2008-11-21 01:30:54 -0500 | [diff] [blame] | 167 | LIKELY_PROFILE() \ |
Steven Rostedt | b77e38a | 2009-02-24 10:21:36 -0500 | [diff] [blame] | 168 | BRANCH_PROFILE() \ |
Ingo Molnar | 8a20d84 | 2009-03-09 10:09:06 +0100 | [diff] [blame] | 169 | TRACE_PRINTKS() \ |
Frederic Weisbecker | bed1ffc | 2009-03-13 15:42:11 +0100 | [diff] [blame] | 170 | FTRACE_EVENTS() \ |
| 171 | TRACE_SYSCALLS() |
Sam Ravnborg | ca96725 | 2007-05-17 13:38:44 +0200 | [diff] [blame] | 172 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 173 | /* |
| 174 | * Data section helpers |
| 175 | */ |
| 176 | #define NOSAVE_DATA \ |
| 177 | . = ALIGN(PAGE_SIZE); \ |
| 178 | VMLINUX_SYMBOL(__nosave_begin) = .; \ |
| 179 | *(.data.nosave) \ |
| 180 | . = ALIGN(PAGE_SIZE); \ |
| 181 | VMLINUX_SYMBOL(__nosave_end) = .; |
| 182 | |
| 183 | #define PAGE_ALIGNED_DATA(page_align) \ |
| 184 | . = ALIGN(page_align); \ |
| 185 | *(.data.page_aligned) |
| 186 | |
| 187 | #define READ_MOSTLY_DATA(align) \ |
| 188 | . = ALIGN(align); \ |
| 189 | *(.data.read_mostly) |
| 190 | |
| 191 | #define CACHELINE_ALIGNED_DATA(align) \ |
| 192 | . = ALIGN(align); \ |
| 193 | *(.data.cacheline_aligned) |
| 194 | |
| 195 | #define INIT_TASK(align) \ |
| 196 | . = ALIGN(align); \ |
| 197 | *(.data.init_task) |
| 198 | |
| 199 | /* |
| 200 | * Read only Data |
| 201 | */ |
| 202 | #define RO_DATA_SECTION(align) \ |
Sam Ravnborg | 4096b46 | 2007-05-29 21:29:00 +0200 | [diff] [blame] | 203 | . = ALIGN((align)); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
Vivek Goyal | 6569580 | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 205 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | *(.rodata) *(.rodata.*) \ |
| 207 | *(__vermagic) /* Kernel version magic */ \ |
Mathieu Desnoyers | 8256e47 | 2007-10-18 23:41:06 -0700 | [diff] [blame] | 208 | *(__markers_strings) /* Markers: strings */ \ |
Mathieu Desnoyers | 97e1c18 | 2008-07-18 12:16:16 -0400 | [diff] [blame] | 209 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } \ |
| 211 | \ |
| 212 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ |
| 213 | *(.rodata1) \ |
| 214 | } \ |
| 215 | \ |
Jan Beulich | 6360b1f | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 216 | BUG_TABLE \ |
| 217 | \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | /* PCI quirks */ \ |
| 219 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ |
| 220 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ |
| 221 | *(.pci_fixup_early) \ |
| 222 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
| 223 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ |
| 224 | *(.pci_fixup_header) \ |
| 225 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
| 226 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ |
| 227 | *(.pci_fixup_final) \ |
| 228 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
| 229 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ |
| 230 | *(.pci_fixup_enable) \ |
| 231 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
Alan Cox | 1597cac | 2006-12-04 15:14:45 -0800 | [diff] [blame] | 232 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
| 233 | *(.pci_fixup_resume) \ |
| 234 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
Rafael J. Wysocki | e1a2a51 | 2008-05-15 21:51:31 +0200 | [diff] [blame] | 235 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
| 236 | *(.pci_fixup_resume_early) \ |
| 237 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
| 238 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ |
| 239 | *(.pci_fixup_suspend) \ |
| 240 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } \ |
| 242 | \ |
David Woodhouse | 5658c76 | 2008-05-23 13:52:42 +0100 | [diff] [blame] | 243 | /* Built-in firmware blobs */ \ |
| 244 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ |
| 245 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ |
| 246 | *(.builtin_fw) \ |
| 247 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
| 248 | } \ |
| 249 | \ |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 250 | /* RapidIO route ops */ \ |
| 251 | .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \ |
| 252 | VMLINUX_SYMBOL(__start_rio_route_ops) = .; \ |
| 253 | *(.rio_route_ops) \ |
| 254 | VMLINUX_SYMBOL(__end_rio_route_ops) = .; \ |
| 255 | } \ |
| 256 | \ |
Jan Beulich | 63687a5 | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 257 | TRACEDATA \ |
| 258 | \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* Kernel symbol table: Normal symbols */ \ |
| 260 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ |
| 261 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ |
| 262 | *(__ksymtab) \ |
| 263 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
| 264 | } \ |
| 265 | \ |
| 266 | /* Kernel symbol table: GPL-only symbols */ \ |
| 267 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ |
| 268 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ |
| 269 | *(__ksymtab_gpl) \ |
| 270 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
| 271 | } \ |
| 272 | \ |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 273 | /* Kernel symbol table: Normal unused symbols */ \ |
| 274 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ |
| 275 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ |
| 276 | *(__ksymtab_unused) \ |
| 277 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
| 278 | } \ |
| 279 | \ |
| 280 | /* Kernel symbol table: GPL-only unused symbols */ \ |
| 281 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ |
| 282 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ |
| 283 | *(__ksymtab_unused_gpl) \ |
| 284 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
| 285 | } \ |
| 286 | \ |
Greg Kroah-Hartman | 9f28bb7 | 2006-03-20 13:17:13 -0800 | [diff] [blame] | 287 | /* Kernel symbol table: GPL-future-only symbols */ \ |
| 288 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ |
| 289 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ |
| 290 | *(__ksymtab_gpl_future) \ |
| 291 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
| 292 | } \ |
| 293 | \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* Kernel symbol table: Normal symbols */ \ |
| 295 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ |
| 296 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ |
| 297 | *(__kcrctab) \ |
| 298 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
| 299 | } \ |
| 300 | \ |
| 301 | /* Kernel symbol table: GPL-only symbols */ \ |
| 302 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ |
| 303 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ |
| 304 | *(__kcrctab_gpl) \ |
| 305 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
| 306 | } \ |
| 307 | \ |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 308 | /* Kernel symbol table: Normal unused symbols */ \ |
| 309 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ |
| 310 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ |
| 311 | *(__kcrctab_unused) \ |
| 312 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
| 313 | } \ |
| 314 | \ |
| 315 | /* Kernel symbol table: GPL-only unused symbols */ \ |
| 316 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ |
| 317 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ |
| 318 | *(__kcrctab_unused_gpl) \ |
| 319 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
| 320 | } \ |
| 321 | \ |
Greg Kroah-Hartman | 9f28bb7 | 2006-03-20 13:17:13 -0800 | [diff] [blame] | 322 | /* Kernel symbol table: GPL-future-only symbols */ \ |
| 323 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ |
| 324 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ |
| 325 | *(__kcrctab_gpl_future) \ |
| 326 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
| 327 | } \ |
| 328 | \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /* Kernel symbol table: strings */ \ |
| 330 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ |
| 331 | *(__ksymtab_strings) \ |
| 332 | } \ |
| 333 | \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 334 | /* __*init sections */ \ |
| 335 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ |
Sam Ravnborg | 312b148 | 2008-01-28 20:21:15 +0100 | [diff] [blame] | 336 | *(.ref.rodata) \ |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 337 | MCOUNT_REC() \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 338 | DEV_KEEP(init.rodata) \ |
| 339 | DEV_KEEP(exit.rodata) \ |
| 340 | CPU_KEEP(init.rodata) \ |
| 341 | CPU_KEEP(exit.rodata) \ |
| 342 | MEM_KEEP(init.rodata) \ |
| 343 | MEM_KEEP(exit.rodata) \ |
| 344 | } \ |
| 345 | \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | /* Built-in module parameters. */ \ |
| 347 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ |
| 348 | VMLINUX_SYMBOL(__start___param) = .; \ |
| 349 | *(__param) \ |
| 350 | VMLINUX_SYMBOL(__stop___param) = .; \ |
Arjan van de Ven | edeed30 | 2008-01-30 13:34:08 +0100 | [diff] [blame] | 351 | . = ALIGN((align)); \ |
Vivek Goyal | 6569580 | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 352 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
Marcelo Tosatti | 7583ddf | 2006-09-27 01:51:02 -0700 | [diff] [blame] | 353 | } \ |
Sam Ravnborg | 4096b46 | 2007-05-29 21:29:00 +0200 | [diff] [blame] | 354 | . = ALIGN((align)); |
| 355 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 356 | /* RODATA & RO_DATA provided for backward compatibility. |
Sam Ravnborg | 4096b46 | 2007-05-29 21:29:00 +0200 | [diff] [blame] | 357 | * All archs are supposed to use RO_DATA() */ |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 358 | #define RODATA RO_DATA_SECTION(4096) |
| 359 | #define RO_DATA(align) RO_DATA_SECTION(align) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | #define SECURITY_INIT \ |
Eric W. Biederman | 60bad7f | 2005-06-25 14:57:46 -0700 | [diff] [blame] | 362 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
| 364 | *(.security_initcall.init) \ |
| 365 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
| 366 | } |
| 367 | |
Sam Ravnborg | 7664709 | 2007-05-13 00:31:33 +0200 | [diff] [blame] | 368 | /* .text section. Map to function alignment to avoid address changes |
| 369 | * during second ld run in second ld pass when generating System.map */ |
| 370 | #define TEXT_TEXT \ |
| 371 | ALIGN_FUNCTION(); \ |
Jan Beulich | fb5e2b3 | 2008-06-18 12:36:01 +0100 | [diff] [blame] | 372 | *(.text.hot) \ |
Sam Ravnborg | 0e0d314 | 2007-05-17 20:14:48 +0200 | [diff] [blame] | 373 | *(.text) \ |
Sam Ravnborg | 312b148 | 2008-01-28 20:21:15 +0100 | [diff] [blame] | 374 | *(.ref.text) \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 375 | DEV_KEEP(init.text) \ |
| 376 | DEV_KEEP(exit.text) \ |
| 377 | CPU_KEEP(init.text) \ |
| 378 | CPU_KEEP(exit.text) \ |
| 379 | MEM_KEEP(init.text) \ |
Jan Beulich | fb5e2b3 | 2008-06-18 12:36:01 +0100 | [diff] [blame] | 380 | MEM_KEEP(exit.text) \ |
| 381 | *(.text.unlikely) |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 382 | |
Sam Ravnborg | 7664709 | 2007-05-13 00:31:33 +0200 | [diff] [blame] | 383 | |
Sam Ravnborg | 6d30e3a | 2005-07-14 20:15:44 +0000 | [diff] [blame] | 384 | /* sched.text is aling to function alignment to secure we have same |
| 385 | * address even at second ld pass when generating System.map */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | #define SCHED_TEXT \ |
Sam Ravnborg | 6d30e3a | 2005-07-14 20:15:44 +0000 | [diff] [blame] | 387 | ALIGN_FUNCTION(); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
| 389 | *(.sched.text) \ |
| 390 | VMLINUX_SYMBOL(__sched_text_end) = .; |
| 391 | |
Sam Ravnborg | 6d30e3a | 2005-07-14 20:15:44 +0000 | [diff] [blame] | 392 | /* spinlock.text is aling to function alignment to secure we have same |
| 393 | * address even at second ld pass when generating System.map */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #define LOCK_TEXT \ |
Sam Ravnborg | 6d30e3a | 2005-07-14 20:15:44 +0000 | [diff] [blame] | 395 | ALIGN_FUNCTION(); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
| 397 | *(.spinlock.text) \ |
| 398 | VMLINUX_SYMBOL(__lock_text_end) = .; |
Prasanna S Panchamukhi | d0aaff9 | 2005-09-06 15:19:26 -0700 | [diff] [blame] | 399 | |
| 400 | #define KPROBES_TEXT \ |
| 401 | ALIGN_FUNCTION(); \ |
| 402 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ |
| 403 | *(.kprobes.text) \ |
| 404 | VMLINUX_SYMBOL(__kprobes_text_end) = .; |
Paolo 'Blaisorblade' Giarrusso | a7d0c21 | 2005-09-10 19:44:54 +0200 | [diff] [blame] | 405 | |
Frederic Weisbecker | a0343e8 | 2008-12-09 23:53:16 +0100 | [diff] [blame] | 406 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 407 | #define IRQENTRY_TEXT \ |
| 408 | ALIGN_FUNCTION(); \ |
| 409 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ |
| 410 | *(.irqentry.text) \ |
| 411 | VMLINUX_SYMBOL(__irqentry_text_end) = .; |
| 412 | #else |
| 413 | #define IRQENTRY_TEXT |
| 414 | #endif |
| 415 | |
Sam Ravnborg | 37c514e | 2008-02-19 21:00:18 +0100 | [diff] [blame] | 416 | /* Section used for early init (in .S files) */ |
Tim Abbott | c80d471 | 2009-04-25 22:10:56 -0400 | [diff] [blame] | 417 | #define HEAD_TEXT *(HEAD_TEXT_SECTION) |
Sam Ravnborg | 37c514e | 2008-02-19 21:00:18 +0100 | [diff] [blame] | 418 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 419 | #define HEAD_SECTION \ |
| 420 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
| 421 | HEAD_TEXT \ |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * Exception table |
| 426 | */ |
| 427 | #define EXCEPTION_TABLE(align) \ |
| 428 | . = ALIGN(align); \ |
| 429 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ |
| 430 | VMLINUX_SYMBOL(__start___ex_table) = .; \ |
| 431 | *(__ex_table) \ |
| 432 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Init task |
| 437 | */ |
| 438 | #define INIT_TASK_DATA(align) \ |
| 439 | . = ALIGN(align); \ |
| 440 | .data.init_task : { \ |
| 441 | INIT_TASK \ |
| 442 | } |
| 443 | |
Sam Ravnborg | 01ba2bd | 2008-01-20 14:15:03 +0100 | [diff] [blame] | 444 | /* init and exit section handling */ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 445 | #define INIT_DATA \ |
| 446 | *(.init.data) \ |
| 447 | DEV_DISCARD(init.data) \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 448 | CPU_DISCARD(init.data) \ |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 449 | MEM_DISCARD(init.data) \ |
Jan Beulich | fd6c3a8 | 2009-03-12 10:58:33 +0000 | [diff] [blame] | 450 | *(.init.rodata) \ |
| 451 | DEV_DISCARD(init.rodata) \ |
| 452 | CPU_DISCARD(init.rodata) \ |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 453 | MEM_DISCARD(init.rodata) |
Sam Ravnborg | 01ba2bd | 2008-01-20 14:15:03 +0100 | [diff] [blame] | 454 | |
Sam Ravnborg | eb8f689 | 2008-01-20 20:07:28 +0100 | [diff] [blame] | 455 | #define INIT_TEXT \ |
| 456 | *(.init.text) \ |
| 457 | DEV_DISCARD(init.text) \ |
| 458 | CPU_DISCARD(init.text) \ |
| 459 | MEM_DISCARD(init.text) |
| 460 | |
| 461 | #define EXIT_DATA \ |
| 462 | *(.exit.data) \ |
| 463 | DEV_DISCARD(exit.data) \ |
| 464 | DEV_DISCARD(exit.rodata) \ |
| 465 | CPU_DISCARD(exit.data) \ |
| 466 | CPU_DISCARD(exit.rodata) \ |
| 467 | MEM_DISCARD(exit.data) \ |
| 468 | MEM_DISCARD(exit.rodata) |
| 469 | |
| 470 | #define EXIT_TEXT \ |
| 471 | *(.exit.text) \ |
| 472 | DEV_DISCARD(exit.text) \ |
| 473 | CPU_DISCARD(exit.text) \ |
| 474 | MEM_DISCARD(exit.text) |
Sam Ravnborg | 01ba2bd | 2008-01-20 14:15:03 +0100 | [diff] [blame] | 475 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 476 | /* |
| 477 | * bss (Block Started by Symbol) - uninitialized data |
| 478 | * zeroed during startup |
| 479 | */ |
| 480 | #define SBSS \ |
| 481 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
| 482 | *(.sbss) \ |
| 483 | *(.scommon) \ |
| 484 | } |
| 485 | |
| 486 | #define BSS(bss_align) \ |
| 487 | . = ALIGN(bss_align); \ |
| 488 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ |
| 489 | VMLINUX_SYMBOL(__bss_start) = .; \ |
| 490 | *(.bss.page_aligned) \ |
| 491 | *(.dynbss) \ |
| 492 | *(.bss) \ |
| 493 | *(COMMON) \ |
| 494 | VMLINUX_SYMBOL(__bss_stop) = .; \ |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * DWARF debug sections. |
| 499 | * Symbols in the DWARF debugging sections are relative to |
| 500 | * the beginning of the section so we begin them at 0. |
| 501 | */ |
Paolo 'Blaisorblade' Giarrusso | a7d0c21 | 2005-09-10 19:44:54 +0200 | [diff] [blame] | 502 | #define DWARF_DEBUG \ |
| 503 | /* DWARF 1 */ \ |
| 504 | .debug 0 : { *(.debug) } \ |
| 505 | .line 0 : { *(.line) } \ |
| 506 | /* GNU DWARF 1 extensions */ \ |
| 507 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ |
| 508 | .debug_sfnames 0 : { *(.debug_sfnames) } \ |
| 509 | /* DWARF 1.1 and DWARF 2 */ \ |
| 510 | .debug_aranges 0 : { *(.debug_aranges) } \ |
| 511 | .debug_pubnames 0 : { *(.debug_pubnames) } \ |
| 512 | /* DWARF 2 */ \ |
| 513 | .debug_info 0 : { *(.debug_info \ |
| 514 | .gnu.linkonce.wi.*) } \ |
| 515 | .debug_abbrev 0 : { *(.debug_abbrev) } \ |
| 516 | .debug_line 0 : { *(.debug_line) } \ |
| 517 | .debug_frame 0 : { *(.debug_frame) } \ |
| 518 | .debug_str 0 : { *(.debug_str) } \ |
| 519 | .debug_loc 0 : { *(.debug_loc) } \ |
| 520 | .debug_macinfo 0 : { *(.debug_macinfo) } \ |
| 521 | /* SGI/MIPS DWARF 2 extensions */ \ |
| 522 | .debug_weaknames 0 : { *(.debug_weaknames) } \ |
| 523 | .debug_funcnames 0 : { *(.debug_funcnames) } \ |
| 524 | .debug_typenames 0 : { *(.debug_typenames) } \ |
| 525 | .debug_varnames 0 : { *(.debug_varnames) } \ |
| 526 | |
| 527 | /* Stabs debugging sections. */ |
| 528 | #define STABS_DEBUG \ |
| 529 | .stab 0 : { *(.stab) } \ |
| 530 | .stabstr 0 : { *(.stabstr) } \ |
| 531 | .stab.excl 0 : { *(.stab.excl) } \ |
| 532 | .stab.exclstr 0 : { *(.stab.exclstr) } \ |
| 533 | .stab.index 0 : { *(.stab.index) } \ |
| 534 | .stab.indexstr 0 : { *(.stab.indexstr) } \ |
| 535 | .comment 0 : { *(.comment) } |
Jeremy Fitzhardinge | 9c9b8b3 | 2006-09-25 23:32:26 -0700 | [diff] [blame] | 536 | |
Jan Beulich | 6360b1f | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 537 | #ifdef CONFIG_GENERIC_BUG |
Jeremy Fitzhardinge | 7664c5a | 2006-12-08 02:36:19 -0800 | [diff] [blame] | 538 | #define BUG_TABLE \ |
| 539 | . = ALIGN(8); \ |
| 540 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ |
Yoshinori Sato | c6de0026 | 2008-07-31 00:07:29 -0700 | [diff] [blame] | 541 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
Jeremy Fitzhardinge | 7664c5a | 2006-12-08 02:36:19 -0800 | [diff] [blame] | 542 | *(__bug_table) \ |
Yoshinori Sato | c6de0026 | 2008-07-31 00:07:29 -0700 | [diff] [blame] | 543 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
Jeremy Fitzhardinge | 7664c5a | 2006-12-08 02:36:19 -0800 | [diff] [blame] | 544 | } |
Jan Beulich | 6360b1f | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 545 | #else |
| 546 | #define BUG_TABLE |
| 547 | #endif |
Jeremy Fitzhardinge | 7664c5a | 2006-12-08 02:36:19 -0800 | [diff] [blame] | 548 | |
Jan Beulich | 63687a5 | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 549 | #ifdef CONFIG_PM_TRACE |
| 550 | #define TRACEDATA \ |
| 551 | . = ALIGN(4); \ |
| 552 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ |
Yoshinori Sato | c6de0026 | 2008-07-31 00:07:29 -0700 | [diff] [blame] | 553 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
Jan Beulich | 63687a5 | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 554 | *(.tracedata) \ |
Yoshinori Sato | c6de0026 | 2008-07-31 00:07:29 -0700 | [diff] [blame] | 555 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
Jan Beulich | 63687a5 | 2008-05-12 15:44:41 +0200 | [diff] [blame] | 556 | } |
| 557 | #else |
| 558 | #define TRACEDATA |
| 559 | #endif |
| 560 | |
Jeremy Fitzhardinge | 9c9b8b3 | 2006-09-25 23:32:26 -0700 | [diff] [blame] | 561 | #define NOTES \ |
Roland McGrath | cbe8712 | 2007-07-19 01:48:36 -0700 | [diff] [blame] | 562 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
| 563 | VMLINUX_SYMBOL(__start_notes) = .; \ |
| 564 | *(.note.*) \ |
| 565 | VMLINUX_SYMBOL(__stop_notes) = .; \ |
| 566 | } |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 567 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 568 | #define INIT_SETUP(initsetup_align) \ |
| 569 | . = ALIGN(initsetup_align); \ |
| 570 | VMLINUX_SYMBOL(__setup_start) = .; \ |
| 571 | *(.init.setup) \ |
| 572 | VMLINUX_SYMBOL(__setup_end) = .; |
| 573 | |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 574 | #define INITCALLS \ |
Eduard - Gabriel Munteanu | c2147a5 | 2008-07-25 19:45:11 -0700 | [diff] [blame] | 575 | *(.initcallearly.init) \ |
Yoshinori Sato | c6de0026 | 2008-07-31 00:07:29 -0700 | [diff] [blame] | 576 | VMLINUX_SYMBOL(__early_initcall_end) = .; \ |
Linus Torvalds | b3438f8 | 2006-11-20 11:47:18 -0800 | [diff] [blame] | 577 | *(.initcall0.init) \ |
| 578 | *(.initcall0s.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 579 | *(.initcall1.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 580 | *(.initcall1s.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 581 | *(.initcall2.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 582 | *(.initcall2s.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 583 | *(.initcall3.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 584 | *(.initcall3s.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 585 | *(.initcall4.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 586 | *(.initcall4s.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 587 | *(.initcall5.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 588 | *(.initcall5s.init) \ |
Linus Torvalds | 8d610dd | 2006-12-11 12:12:04 -0800 | [diff] [blame] | 589 | *(.initcallrootfs.init) \ |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 590 | *(.initcall6.init) \ |
Andrew Morton | 735a7ff | 2006-10-27 11:42:37 -0700 | [diff] [blame] | 591 | *(.initcall6s.init) \ |
| 592 | *(.initcall7.init) \ |
| 593 | *(.initcall7s.init) |
Andrew Morton | 61ce1ef | 2006-10-27 11:41:44 -0700 | [diff] [blame] | 594 | |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 595 | #define INIT_CALLS \ |
| 596 | VMLINUX_SYMBOL(__initcall_start) = .; \ |
| 597 | INITCALLS \ |
| 598 | VMLINUX_SYMBOL(__initcall_end) = .; |
| 599 | |
| 600 | #define CON_INITCALL \ |
| 601 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ |
| 602 | *(.con_initcall.init) \ |
| 603 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
| 604 | |
| 605 | #define SECURITY_INITCALL \ |
| 606 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
| 607 | *(.security_initcall.init) \ |
| 608 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
| 609 | |
| 610 | #ifdef CONFIG_BLK_DEV_INITRD |
| 611 | #define INIT_RAM_FS \ |
| 612 | . = ALIGN(PAGE_SIZE); \ |
| 613 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
| 614 | *(.init.ramfs) \ |
| 615 | VMLINUX_SYMBOL(__initramfs_end) = .; |
| 616 | #else |
| 617 | #define INITRAMFS |
| 618 | #endif |
| 619 | |
Tejun Heo | 3e5d8f9 | 2009-01-13 20:41:35 +0900 | [diff] [blame] | 620 | /** |
Tejun Heo | 6b7c38d | 2009-01-19 12:21:28 +0900 | [diff] [blame] | 621 | * PERCPU_VADDR - define output section for percpu area |
Tejun Heo | 3e5d8f9 | 2009-01-13 20:41:35 +0900 | [diff] [blame] | 622 | * @vaddr: explicit base address (optional) |
| 623 | * @phdr: destination PHDR (optional) |
| 624 | * |
| 625 | * Macro which expands to output section for percpu area. If @vaddr |
| 626 | * is not blank, it specifies explicit base address and all percpu |
| 627 | * symbols will be offset from the given address. If blank, @vaddr |
| 628 | * always equals @laddr + LOAD_OFFSET. |
| 629 | * |
| 630 | * @phdr defines the output PHDR to use if not blank. Be warned that |
| 631 | * output PHDR is sticky. If @phdr is specified, the next output |
| 632 | * section in the linker script will go there too. @phdr should have |
| 633 | * a leading colon. |
| 634 | * |
Tejun Heo | 3ac6cff | 2009-01-30 16:32:22 +0900 | [diff] [blame] | 635 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
| 636 | * If there is no need to put the percpu section at a predetermined |
| 637 | * address, use PERCPU(). |
Tejun Heo | 3e5d8f9 | 2009-01-13 20:41:35 +0900 | [diff] [blame] | 638 | */ |
| 639 | #define PERCPU_VADDR(vaddr, phdr) \ |
Ingo Molnar | dba3d36 | 2009-01-29 17:10:12 +0100 | [diff] [blame] | 640 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
| 641 | .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
Tejun Heo | 6b7c38d | 2009-01-19 12:21:28 +0900 | [diff] [blame] | 642 | - LOAD_OFFSET) { \ |
| 643 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ |
Brian Gerst | 0bd74fa | 2009-01-19 12:21:27 +0900 | [diff] [blame] | 644 | *(.data.percpu.first) \ |
Eric Dumazet | 63cc8c7 | 2008-05-12 15:44:40 +0200 | [diff] [blame] | 645 | *(.data.percpu.page_aligned) \ |
Fenghua Yu | 5fb7dc3 | 2007-07-19 01:48:12 -0700 | [diff] [blame] | 646 | *(.data.percpu) \ |
| 647 | *(.data.percpu.shared_aligned) \ |
Tejun Heo | 6b7c38d | 2009-01-19 12:21:28 +0900 | [diff] [blame] | 648 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
| 649 | } phdr \ |
Ingo Molnar | dba3d36 | 2009-01-29 17:10:12 +0100 | [diff] [blame] | 650 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); |
Tejun Heo | 3e5d8f9 | 2009-01-13 20:41:35 +0900 | [diff] [blame] | 651 | |
| 652 | /** |
| 653 | * PERCPU - define output section for percpu area, simple version |
| 654 | * @align: required alignment |
| 655 | * |
| 656 | * Align to @align and outputs output section for percpu area. This |
| 657 | * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and |
| 658 | * __per_cpu_start will be identical. |
Tejun Heo | 3ac6cff | 2009-01-30 16:32:22 +0900 | [diff] [blame] | 659 | * |
| 660 | * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except |
| 661 | * that __per_cpu_load is defined as a relative symbol against |
| 662 | * .data.percpu which is required for relocatable x86_32 |
| 663 | * configuration. |
Tejun Heo | 3e5d8f9 | 2009-01-13 20:41:35 +0900 | [diff] [blame] | 664 | */ |
| 665 | #define PERCPU(align) \ |
| 666 | . = ALIGN(align); \ |
Tejun Heo | 3ac6cff | 2009-01-30 16:32:22 +0900 | [diff] [blame] | 667 | .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ |
| 668 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
| 669 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ |
| 670 | *(.data.percpu.first) \ |
| 671 | *(.data.percpu.page_aligned) \ |
| 672 | *(.data.percpu) \ |
| 673 | *(.data.percpu.shared_aligned) \ |
| 674 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
| 675 | } |
Sam Ravnborg | ef53dae | 2009-06-07 20:46:37 +0200 | [diff] [blame] | 676 | |
| 677 | |
| 678 | /* |
| 679 | * Definition of the high level *_SECTION macros |
| 680 | * They will fit only a subset of the architectures |
| 681 | */ |
| 682 | |
| 683 | |
| 684 | /* |
| 685 | * Writeable data. |
| 686 | * All sections are combined in a single .data section. |
| 687 | * The sections following CONSTRUCTORS are arranged so their |
| 688 | * typical alignment matches. |
| 689 | * A cacheline is typical/always less than a PAGE_SIZE so |
| 690 | * the sections that has this restriction (or similar) |
| 691 | * is located before the ones requiring PAGE_SIZE alignment. |
| 692 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which |
| 693 | * matches the requirment of PAGE_ALIGNED_DATA. |
| 694 | * |
| 695 | /* use 0 as page_align if page_aligned data is not used */ |
| 696 | #define RW_DATA_SECTION(cacheline, nosave, pagealigned, inittask) \ |
| 697 | . = ALIGN(PAGE_SIZE); \ |
| 698 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ |
| 699 | INIT_TASK(inittask) \ |
| 700 | CACHELINE_ALIGNED_DATA(cacheline) \ |
| 701 | READ_MOSTLY_DATA(cacheline) \ |
| 702 | DATA_DATA \ |
| 703 | CONSTRUCTORS \ |
| 704 | NOSAVE_DATA(nosave) \ |
| 705 | PAGE_ALIGNED_DATA(pagealigned) \ |
| 706 | } |
| 707 | |
| 708 | #define INIT_TEXT_SECTION(inittext_align) \ |
| 709 | . = ALIGN(inittext_align); \ |
| 710 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ |
| 711 | VMLINUX_SYMBOL(_sinittext) = .; \ |
| 712 | INIT_TEXT \ |
| 713 | VMLINUX_SYMBOL(_einittext) = .; \ |
| 714 | } |
| 715 | |
| 716 | #define INIT_DATA_SECTION(initsetup_align) \ |
| 717 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ |
| 718 | INIT_DATA \ |
| 719 | INIT_SETUP(initsetup_align) \ |
| 720 | INIT_CALLS \ |
| 721 | CON_INITCALL \ |
| 722 | SECURITY_INITCALL \ |
| 723 | INIT_RAM_FS \ |
| 724 | } |
| 725 | |
| 726 | #define BSS_SECTION(sbss_align, bss_align) \ |
| 727 | SBSS \ |
| 728 | BSS(bss_align) \ |
| 729 | . = ALIGN(4); \ |