1 /* -----------------------------------------------------------------------
3 * Copyright 2008-2009 H. Peter Anvin - All Rights Reserved
4 * Copyright 2009 Intel Corporation; author: H. Peter Anvin
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
9 * Boston MA 02110-1301, USA; either version 2 of the License, or
10 * (at your option) any later version; incorporated herein by reference.
12 * ----------------------------------------------------------------------- */
15 * Linker script for the SYSLINUX core
18 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
27 /* Prefix structure for the compression program */
29 HIDDEN(__module_start = .);
34 /* "Early" sections (before the load) */
37 .earlybss (NOLOAD) : {
38 HIDDEN(__earlybss_start = .);
40 HIDDEN(__earlybss_end = .);
42 HIDDEN(__earlybss_len = ABSOLUTE(__earlybss_end) - ABSOLUTE(__earlybss_start));
43 HIDDEN(__earlybss_dwords = (__earlybss_len + 3) >> 2);
47 HIDDEN(__bss16_start = .);
49 HIDDEN(__bss16_end = .);
51 HIDDEN(__bss16_len = ABSOLUTE(__bss16_end) - ABSOLUTE(__bss16_start));
52 HIDDEN(__bss16_dwords = (__bss16_len + 3) >> 2);
55 .config : AT (__config_lma) {
56 HIDDEN(__config_start = .);
58 HIDDEN(__config_end = .);
60 HIDDEN(__config_len = ABSOLUTE(__config_end) - ABSOLUTE(__config_start));
61 HIDDEN(__config_dwords = (__config_len + 3) >> 2);
63 /* Generated and/or copied code */
65 . = ALIGN(128); /* Minimum separation from mutable data */
66 .replacestub : AT (__replacestub_lma) {
67 HIDDEN(__replacestub_start = .);
69 HIDDEN(__replacestub_end = .);
71 HIDDEN(__replacestub_len = ABSOLUTE(__replacestub_end) - ABSOLUTE(__replacestub_start));
72 HIDDEN(__replacestub_dwords = (__replacestub_len + 3) >> 2);
75 HIDDEN(__gentextnr_lma = .);
76 .gentextnr : AT(__gentextnr_lma) {
77 HIDDEN(__gentextnr_start = .);
79 HIDDEN(__gentextnr_end = .);
81 HIDDEN(__gentextnr_len = ABSOLUTE(__gentextnr_end) - ABSOLUTE(__gentextnr_start));
82 HIDDEN(__gentextnr_dwords = (__gentextnr_len + 3) >> 2);
85 .stack16 : AT(STACK_BASE) {
86 HIDDEN(__stack16_start = .);
88 HIDDEN(__stack16_end = .);
90 HIDDEN(__stack16_len = ABSOLUTE(__stack16_end) - ABSOLUTE(__stack16_start));
91 HIDDEN(__stack16_dwords = (__stack16_len + 3) >> 2);
93 /* Initialized sections */
98 HIDDEN(__init_start = .);
100 HIDDEN(__init_end = .);
102 HIDDEN(__init_len = ABSOLUTE(__init_end) - ABSOLUTE(__init_start));
103 HIDDEN(__init_dwords = (__init_len + 3) >> 2);
107 HIDDEN(__text16_start = .);
109 HIDDEN(__text16_end = .);
111 HIDDEN(__text16_len = ABSOLUTE(__text16_end) - ABSOLUTE(__text16_start));
112 HIDDEN(__text16_dwords = (__text16_len + 3) >> 2);
115 * .textnr is used for 32-bit code that is used on the code
116 * path to initialize the .text segment
121 HIDDEN(__textnr_start = .);
123 HIDDEN(__textnr_end = .);
125 HIDDEN(__textnr_len = ABSOLUTE(__textnr_end) - ABSOLUTE(__textnr_start));
126 HIDDEN(__textnr_dwords = (__textnr_len + 3) >> 2);
129 HIDDEN(__bcopyxx_start = .);
133 HIDDEN(__bcopyxx_text_start = .);
135 HIDDEN(__bcopyxx_text_end = .);
137 HIDDEN(__bcopyxx_text_len = ABSOLUTE(__bcopyxx_text_end) - ABSOLUTE(__bcopyxx_text_start));
138 HIDDEN(__bcopyxx_text_dwords = (__bcopyxx_text_len + 3) >> 2);
141 HIDDEN(__bcopyxx_data_start = .);
143 HIDDEN(__bcopyxx_data_end = .);
145 HIDDEN(__bcopyxx_data_len = ABSOLUTE(__bcopyxx_data_end) - ABSOLUTE(__bcopyxx_data_start));
146 HIDDEN(__bcopyxx_data_dwords = (__bcopyxx_data_len + 3) >> 2);
148 HIDDEN(__bcopyxx_end = .);
149 HIDDEN(__bcopyxx_len = ABSOLUTE(__bcopyxx_end) - ABSOLUTE(__bcopyxx_start));
150 HIDDEN(__bcopyxx_dwords = (__bcopyxx_len + 3) >> 2);
154 HIDDEN(__data16_start = .);
156 HIDDEN(__data16_end = .);
158 HIDDEN(__data16_len = ABSOLUTE(__data16_end) - ABSOLUTE(__data16_start));
159 HIDDEN(__data16_dwords = (__data16_len + 3) >> 2);
162 HIDDEN(__config_lma = .);
163 . += SIZEOF(.config);
166 HIDDEN(__replacestub_lma = .);
167 . += SIZEOF(.replacestub);
169 /* The 32-bit code loads above the non-progbits sections */
172 HIDDEN(__pm_code_lma = .);
174 HIDDEN(__high_clear_start = .);
178 HIDDEN(__adv_start = .);
180 HIDDEN(__adv_end = .);
182 HIDDEN(__adv_len = ABSOLUTE(__adv_end) - ABSOLUTE(__adv_start));
183 HIDDEN(__adv_dwords = (__adv_len + 3) >> 2);
185 /* Late uninitialized sections */
189 HIDDEN(__uibss_start = .);
191 HIDDEN(__uibss_end = .);
193 HIDDEN(__uibss_len = ABSOLUTE(__uibss_end) - ABSOLUTE(__uibss_start));
194 HIDDEN(__uibss_dwords = (__uibss_len + 3) >> 2);
197 HIDDEN(__assert_end16 = ASSERT(_end16 <= 0x10000, "64K overflow"));
200 * Special 16-bit segments
204 .real_mode (NOLOAD) : {
207 HIDDEN(real_mode_seg = core_real_mode >> 4);
210 .xfer_buf (NOLOAD) : {
213 HIDDEN(xfer_buf_seg = core_xfer_buf >> 4);
216 * Used to allocate lowmem buffers from 32-bit code
219 HIDDEN(__lowmem_start = .);
221 HIDDEN(__lowmem_end = .);
223 HIDDEN(__lowmem_len = ABSOLUTE(__lowmem_end) - ABSOLUTE(__lowmem_start));
224 HIDDEN(__lowmem_dwords = (__lowmem_len + 3) >> 2);
226 HIDDEN(__high_clear_end = .);
228 HIDDEN(__high_clear_len = ABSOLUTE(__high_clear_end) - ABSOLUTE(__high_clear_start));
229 HIDDEN(__high_clear_dwords = (__high_clear_len + 3) >> 2);
231 /* Start of the lowmem heap */
233 HIDDEN(__lowmem_heap = .);
236 * 32-bit code. This is a hack for the moment due to the
237 * real-mode segments also allocated.
242 HIDDEN(__pm_code_start = .);
244 HIDDEN(__text_vma = .);
245 HIDDEN(__text_lma = __pm_code_lma);
246 .text : AT(__text_lma) {
248 HIDDEN(__text_start = .);
251 HIDDEN(__text_end = .);
256 HIDDEN(__rodata_vma = .);
257 HIDDEN(__rodata_lma = __rodata_vma + __text_lma - __text_vma);
258 .rodata : AT(__rodata_lma) {
259 HIDDEN(__rodata_start = .);
262 HIDDEN(__rodata_end = .);
267 HIDDEN(__ctors_vma = .);
268 HIDDEN(__ctors_lma = __ctors_vma + __text_lma - __text_vma);
269 .ctors : AT(__ctors_lma) {
270 HIDDEN(__ctors_start = .);
271 KEEP (*(SORT(.preinit_array*)))
272 KEEP (*(SORT(.init_array*)))
273 KEEP (*(SORT(.ctors*)))
274 HIDDEN(__ctors_end = .);
277 HIDDEN(__dtors_vma = .);
278 HIDDEN(__dtors_lma = __dtors_vma + __text_lma - __text_vma);
279 .dtors : AT(__dtors_lma) {
280 HIDDEN(__dtors_start = .);
281 KEEP (*(SORT(.fini_array*)))
282 KEEP (*(SORT(.dtors*)))
283 HIDDEN(__dtors_end = .);
288 HIDDEN(__dynsym_vma = .);
289 HIDDEN(__dynsym_lma = __dynsym_vma + __text_lma - __text_vma);
290 .dynsym : AT(__dynsym_lma) {
291 HIDDEN(__dynsym_start = .);
293 HIDDEN(__dynsym_end = .);
295 HIDDEN(__dynsym_len = __dynsym_end - __dynsym_start);
299 HIDDEN(__dynstr_vma = .);
300 HIDDEN(__dynstr_lma = __dynstr_vma + __text_lma - __text_vma);
301 .dynstr : AT(__dynstr_lma) {
302 HIDDEN(__dynstr_start = .);
304 HIDDEN(__dynstr_end = .);
306 HIDDEN(__dynstr_len = __dynstr_end - __dynstr_start);
310 HIDDEN(__gnu_hash_vma = .);
311 HIDDEN(__gnu_hash_lma = __gnu_hash_vma + __text_lma - __text_vma);
312 .gnu.hash : AT(__gnu_hash_lma) {
313 HIDDEN(__gnu_hash_start = .);
315 HIDDEN(__gnu_hash_end = .);
321 HIDDEN(__dynlink_vma = .);
322 HIDDEN(__dynlink_lma = __dynlink_vma + __text_lma - __text_vma);
323 .dynlink : AT(__dynlink_lma) {
324 HIDDEN(__dynlink_start = .);
326 HIDDEN(__dynlink_end = .);
331 HIDDEN(__got_vma = .);
332 HIDDEN(__got_lma = __got_vma + __text_lma - __text_vma);
333 .got : AT(__got_lma) {
334 HIDDEN(__got_start = .);
337 HIDDEN(__got_end = .);
342 HIDDEN(__dynamic_vma = .);
343 HIDDEN(__dynamic_lma = __dynamic_vma + __text_lma - __text_vma);
344 .dynamic : AT(__dynamic_lma) {
345 HIDDEN(__dynamic_start = .);
347 HIDDEN(__dynamic_end = .);
352 HIDDEN(__data_vma = .);
353 HIDDEN(__data_lma = __data_vma + __text_lma - __text_vma);
354 .data : AT(__data_lma) {
355 HIDDEN(__data_start = .);
358 HIDDEN(__data_end = .);
361 HIDDEN(__pm_code_end = .);
362 HIDDEN(__pm_code_len = ABSOLUTE(__pm_code_end) - ABSOLUTE(__pm_code_start));
363 HIDDEN(__pm_code_dwords = (__pm_code_len + 3) >> 2);
367 HIDDEN(__bss_vma = .);
368 HIDDEN(__bss_lma = .); /* Dummy */
369 .bss (NOLOAD) : AT (__bss_lma) {
370 HIDDEN(__bss_start = .);
374 HIDDEN(__bss_end = .);
376 HIDDEN(__bss_len = ABSOLUTE(__bss_end) - ABSOLUTE(__bss_start));
377 HIDDEN(__bss_dwords = (__bss_len + 3) >> 2);
379 /* Data saved away before bss initialization */
382 HIDDEN(__savedata_vma = .);
383 HIDDEN(__savedata_lma = .); /* Dummy */
384 .savedata (NOLOAD) : AT (__savedata_lma) {
385 HIDDEN(__savedata_start = .);
388 HIDDEN(__savedata_end = .);
390 HIDDEN(__savedata_len = ABSOLUTE(__savedata_end) - ABSOLUTE(__savedata_start));
391 HIDDEN(__savedata_dwords = (__savedata_len + 3) >> 2);
393 /* XXX: This stack should be unified with the COM32 stack */
394 HIDDEN(__stack_vma = .);
395 __stack_lma = .; /* Dummy */
396 .stack (NOLOAD) : AT(__stack_lma) {
397 HIDDEN(__stack_start = .);
399 HIDDEN(__stack_end = .);
401 HIDDEN(__stack_len = ABSOLUTE(__stack_end) - ABSOLUTE(__stack_start));
402 HIDDEN(__stack_dwords = (__stack_len + 3) >> 2);
406 /* Heap follows after our own PM code */
408 HIDDEN(free_high_memory = .);
410 /* Stuff we don't need... */