1 /* Xtensa-specific support for 32-bit ELF.
2 Copyright 2003 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24 #ifdef ANSI_PROTOTYPES
34 #include "elf/xtensa.h"
35 #include "xtensa-isa.h"
36 #include "xtensa-config.h"
38 /* Main interface functions. */
39 static void elf_xtensa_info_to_howto_rela
40 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
41 static reloc_howto_type *elf_xtensa_reloc_type_lookup
42 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
43 extern int xtensa_read_table_entries
44 PARAMS ((bfd *, asection *, property_table_entry **, const char *));
45 static bfd_boolean elf_xtensa_check_relocs
46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
48 static void elf_xtensa_hide_symbol
49 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
50 static void elf_xtensa_copy_indirect_symbol
51 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
52 struct elf_link_hash_entry *));
53 static asection *elf_xtensa_gc_mark_hook
54 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
55 struct elf_link_hash_entry *, Elf_Internal_Sym *));
56 static bfd_boolean elf_xtensa_gc_sweep_hook
57 PARAMS ((bfd *, struct bfd_link_info *, asection *,
58 const Elf_Internal_Rela *));
59 static bfd_boolean elf_xtensa_create_dynamic_sections
60 PARAMS ((bfd *, struct bfd_link_info *));
61 static bfd_boolean elf_xtensa_adjust_dynamic_symbol
62 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
63 static bfd_boolean elf_xtensa_size_dynamic_sections
64 PARAMS ((bfd *, struct bfd_link_info *));
65 static bfd_boolean elf_xtensa_modify_segment_map
67 static bfd_boolean elf_xtensa_relocate_section
68 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
69 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
70 static bfd_boolean elf_xtensa_relax_section
71 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *again));
72 static bfd_boolean elf_xtensa_finish_dynamic_symbol
73 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
75 static bfd_boolean elf_xtensa_finish_dynamic_sections
76 PARAMS ((bfd *, struct bfd_link_info *));
77 static bfd_boolean elf_xtensa_merge_private_bfd_data
78 PARAMS ((bfd *, bfd *));
79 static bfd_boolean elf_xtensa_set_private_flags
80 PARAMS ((bfd *, flagword));
81 extern flagword elf_xtensa_get_private_bfd_flags
83 static bfd_boolean elf_xtensa_print_private_bfd_data
84 PARAMS ((bfd *, PTR));
85 static bfd_boolean elf_xtensa_object_p
87 static void elf_xtensa_final_write_processing
88 PARAMS ((bfd *, bfd_boolean));
89 static enum elf_reloc_type_class elf_xtensa_reloc_type_class
90 PARAMS ((const Elf_Internal_Rela *));
91 static bfd_boolean elf_xtensa_discard_info
92 PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *));
93 static bfd_boolean elf_xtensa_ignore_discarded_relocs
94 PARAMS ((asection *));
95 static bfd_boolean elf_xtensa_grok_prstatus
96 PARAMS ((bfd *, Elf_Internal_Note *));
97 static bfd_boolean elf_xtensa_grok_psinfo
98 PARAMS ((bfd *, Elf_Internal_Note *));
99 static bfd_boolean elf_xtensa_new_section_hook
100 PARAMS ((bfd *, asection *));
103 /* Local helper functions. */
105 static int property_table_compare
106 PARAMS ((const PTR, const PTR));
107 static bfd_boolean elf_xtensa_in_literal_pool
108 PARAMS ((property_table_entry *, int, bfd_vma));
109 static void elf_xtensa_make_sym_local
110 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
111 static bfd_boolean add_extra_plt_sections
112 PARAMS ((bfd *, int));
113 static bfd_boolean elf_xtensa_fix_refcounts
114 PARAMS ((struct elf_link_hash_entry *, PTR));
115 static bfd_boolean elf_xtensa_allocate_plt_size
116 PARAMS ((struct elf_link_hash_entry *, PTR));
117 static bfd_boolean elf_xtensa_allocate_got_size
118 PARAMS ((struct elf_link_hash_entry *, PTR));
119 static void elf_xtensa_allocate_local_got_size
120 PARAMS ((struct bfd_link_info *, asection *));
121 static bfd_reloc_status_type elf_xtensa_do_reloc
122 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_vma, bfd_byte *,
123 bfd_vma, bfd_boolean, char **));
124 static char * vsprint_msg
125 VPARAMS ((const char *, const char *, int, ...));
126 static char *build_encoding_error_message
127 PARAMS ((xtensa_opcode, xtensa_encode_result));
128 static bfd_reloc_status_type bfd_elf_xtensa_reloc
129 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
130 static void do_fix_for_relocateable_link
131 PARAMS ((Elf_Internal_Rela *, bfd *, asection *));
132 static void do_fix_for_final_link
133 PARAMS ((Elf_Internal_Rela *, asection *, bfd_vma *));
134 static bfd_boolean xtensa_elf_dynamic_symbol_p
135 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
136 static bfd_vma elf_xtensa_create_plt_entry
137 PARAMS ((bfd *, bfd *, unsigned));
138 static int elf_xtensa_combine_prop_entries
139 PARAMS ((bfd *, const char *));
140 static bfd_boolean elf_xtensa_discard_info_for_section
141 PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *,
144 /* Local functions to handle Xtensa configurability. */
146 static void init_call_opcodes
148 static bfd_boolean is_indirect_call_opcode
149 PARAMS ((xtensa_opcode));
150 static bfd_boolean is_direct_call_opcode
151 PARAMS ((xtensa_opcode));
152 static bfd_boolean is_windowed_call_opcode
153 PARAMS ((xtensa_opcode));
154 static xtensa_opcode get_l32r_opcode
156 static bfd_vma l32r_offset
157 PARAMS ((bfd_vma, bfd_vma));
158 static int get_relocation_opnd
159 PARAMS ((Elf_Internal_Rela *));
160 static xtensa_opcode get_relocation_opcode
161 PARAMS ((asection *, bfd_byte *, Elf_Internal_Rela *));
162 static bfd_boolean is_l32r_relocation
163 PARAMS ((asection *, bfd_byte *, Elf_Internal_Rela *));
165 /* Functions for link-time code simplifications. */
167 static bfd_reloc_status_type elf_xtensa_do_asm_simplify
168 PARAMS ((bfd_byte *, bfd_vma, bfd_vma));
169 static bfd_reloc_status_type contract_asm_expansion
170 PARAMS ((bfd_byte *, bfd_vma, Elf_Internal_Rela *));
171 static xtensa_opcode swap_callx_for_call_opcode
172 PARAMS ((xtensa_opcode));
173 static xtensa_opcode get_expanded_call_opcode
174 PARAMS ((bfd_byte *, int));
176 /* Access to internal relocations, section contents and symbols. */
178 static Elf_Internal_Rela *retrieve_internal_relocs
179 PARAMS ((bfd *, asection *, bfd_boolean));
180 static void pin_internal_relocs
181 PARAMS ((asection *, Elf_Internal_Rela *));
182 static void release_internal_relocs
183 PARAMS ((asection *, Elf_Internal_Rela *));
184 static bfd_byte *retrieve_contents
185 PARAMS ((bfd *, asection *, bfd_boolean));
186 static void pin_contents
187 PARAMS ((asection *, bfd_byte *));
188 static void release_contents
189 PARAMS ((asection *, bfd_byte *));
190 static Elf_Internal_Sym *retrieve_local_syms
193 /* Miscellaneous utility functions. */
195 static asection *elf_xtensa_get_plt_section
196 PARAMS ((bfd *, int));
197 static asection *elf_xtensa_get_gotplt_section
198 PARAMS ((bfd *, int));
199 static asection *get_elf_r_symndx_section
200 PARAMS ((bfd *, unsigned long));
201 static struct elf_link_hash_entry *get_elf_r_symndx_hash_entry
202 PARAMS ((bfd *, unsigned long));
203 static bfd_vma get_elf_r_symndx_offset
204 PARAMS ((bfd *, unsigned long));
205 static bfd_boolean pcrel_reloc_fits
206 PARAMS ((xtensa_operand, bfd_vma, bfd_vma));
207 static bfd_boolean xtensa_is_property_section
208 PARAMS ((asection *));
209 static bfd_boolean is_literal_section
210 PARAMS ((asection *));
211 static int internal_reloc_compare
212 PARAMS ((const PTR, const PTR));
213 static bfd_boolean get_is_linkonce_section
214 PARAMS ((bfd *, asection *));
215 extern char *xtensa_get_property_section_name
216 PARAMS ((bfd *, asection *, const char *));
218 /* Other functions called directly by the linker. */
220 typedef void (*deps_callback_t)
221 PARAMS ((asection *, bfd_vma, asection *, bfd_vma, PTR));
222 extern bfd_boolean xtensa_callback_required_dependence
223 PARAMS ((bfd *, asection *, struct bfd_link_info *,
224 deps_callback_t, PTR));
227 typedef struct xtensa_relax_info_struct xtensa_relax_info;
230 /* Total count of PLT relocations seen during check_relocs.
231 The actual PLT code must be split into multiple sections and all
232 the sections have to be created before size_dynamic_sections,
233 where we figure out the exact number of PLT entries that will be
234 needed. It is OK is this count is an overestimate, e.g., some
235 relocations may be removed by GC. */
237 static int plt_reloc_count = 0;
240 /* When this is true, relocations may have been modified to refer to
241 symbols from other input files. The per-section list of "fix"
242 records needs to be checked when resolving relocations. */
244 static bfd_boolean relaxing_section = FALSE;
247 static reloc_howto_type elf_howto_table[] =
249 HOWTO (R_XTENSA_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
250 bfd_elf_xtensa_reloc, "R_XTENSA_NONE",
251 FALSE, 0x00000000, 0x00000000, FALSE),
252 HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
253 bfd_elf_xtensa_reloc, "R_XTENSA_32",
254 TRUE, 0xffffffff, 0xffffffff, FALSE),
255 /* Replace a 32-bit value with a value from the runtime linker (only
256 used by linker-generated stub functions). The r_addend value is
257 special: 1 means to substitute a pointer to the runtime linker's
258 dynamic resolver function; 2 means to substitute the link map for
259 the shared object. */
260 HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont,
261 NULL, "R_XTENSA_RTLD",
262 FALSE, 0x00000000, 0x00000000, FALSE),
263 HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
264 bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT",
265 FALSE, 0xffffffff, 0xffffffff, FALSE),
266 HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
267 bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT",
268 FALSE, 0xffffffff, 0xffffffff, FALSE),
269 HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
270 bfd_elf_generic_reloc, "R_XTENSA_RELATIVE",
271 FALSE, 0xffffffff, 0xffffffff, FALSE),
272 HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
273 bfd_elf_xtensa_reloc, "R_XTENSA_PLT",
274 FALSE, 0xffffffff, 0xffffffff, FALSE),
276 HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont,
277 bfd_elf_xtensa_reloc, "R_XTENSA_OP0",
278 FALSE, 0x00000000, 0x00000000, TRUE),
279 HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont,
280 bfd_elf_xtensa_reloc, "R_XTENSA_OP1",
281 FALSE, 0x00000000, 0x00000000, TRUE),
282 HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont,
283 bfd_elf_xtensa_reloc, "R_XTENSA_OP2",
284 FALSE, 0x00000000, 0x00000000, TRUE),
285 /* Assembly auto-expansion. */
286 HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont,
287 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND",
288 FALSE, 0x00000000, 0x00000000, FALSE),
289 /* Relax assembly auto-expansion. */
290 HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont,
291 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY",
292 FALSE, 0x00000000, 0x00000000, TRUE),
295 /* GNU extension to record C++ vtable hierarchy. */
296 HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont,
297 NULL, "R_XTENSA_GNU_VTINHERIT",
298 FALSE, 0x00000000, 0x00000000, FALSE),
299 /* GNU extension to record C++ vtable member usage. */
300 HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont,
301 _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY",
302 FALSE, 0x00000000, 0x00000000, FALSE)
305 #ifdef DEBUG_GEN_RELOC
307 fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str)
312 static reloc_howto_type *
313 elf_xtensa_reloc_type_lookup (abfd, code)
314 bfd *abfd ATTRIBUTE_UNUSED;
315 bfd_reloc_code_real_type code;
320 TRACE ("BFD_RELOC_NONE");
321 return &elf_howto_table[(unsigned) R_XTENSA_NONE ];
324 TRACE ("BFD_RELOC_32");
325 return &elf_howto_table[(unsigned) R_XTENSA_32 ];
327 case BFD_RELOC_XTENSA_RTLD:
328 TRACE ("BFD_RELOC_XTENSA_RTLD");
329 return &elf_howto_table[(unsigned) R_XTENSA_RTLD ];
331 case BFD_RELOC_XTENSA_GLOB_DAT:
332 TRACE ("BFD_RELOC_XTENSA_GLOB_DAT");
333 return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ];
335 case BFD_RELOC_XTENSA_JMP_SLOT:
336 TRACE ("BFD_RELOC_XTENSA_JMP_SLOT");
337 return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ];
339 case BFD_RELOC_XTENSA_RELATIVE:
340 TRACE ("BFD_RELOC_XTENSA_RELATIVE");
341 return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ];
343 case BFD_RELOC_XTENSA_PLT:
344 TRACE ("BFD_RELOC_XTENSA_PLT");
345 return &elf_howto_table[(unsigned) R_XTENSA_PLT ];
347 case BFD_RELOC_XTENSA_OP0:
348 TRACE ("BFD_RELOC_XTENSA_OP0");
349 return &elf_howto_table[(unsigned) R_XTENSA_OP0 ];
351 case BFD_RELOC_XTENSA_OP1:
352 TRACE ("BFD_RELOC_XTENSA_OP1");
353 return &elf_howto_table[(unsigned) R_XTENSA_OP1 ];
355 case BFD_RELOC_XTENSA_OP2:
356 TRACE ("BFD_RELOC_XTENSA_OP2");
357 return &elf_howto_table[(unsigned) R_XTENSA_OP2 ];
359 case BFD_RELOC_XTENSA_ASM_EXPAND:
360 TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND");
361 return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ];
363 case BFD_RELOC_XTENSA_ASM_SIMPLIFY:
364 TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY");
365 return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ];
367 case BFD_RELOC_VTABLE_INHERIT:
368 TRACE ("BFD_RELOC_VTABLE_INHERIT");
369 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ];
371 case BFD_RELOC_VTABLE_ENTRY:
372 TRACE ("BFD_RELOC_VTABLE_ENTRY");
373 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ];
384 /* Given an ELF "rela" relocation, find the corresponding howto and record
385 it in the BFD internal arelent representation of the relocation. */
388 elf_xtensa_info_to_howto_rela (abfd, cache_ptr, dst)
389 bfd *abfd ATTRIBUTE_UNUSED;
391 Elf_Internal_Rela *dst;
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
395 BFD_ASSERT (r_type < (unsigned int) R_XTENSA_max);
396 cache_ptr->howto = &elf_howto_table[r_type];
400 /* Functions for the Xtensa ELF linker. */
402 /* The name of the dynamic interpreter. This is put in the .interp
405 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
407 /* The size in bytes of an entry in the procedure linkage table.
408 (This does _not_ include the space for the literals associated with
411 #define PLT_ENTRY_SIZE 16
413 /* For _really_ large PLTs, we may need to alternate between literals
414 and code to keep the literals within the 256K range of the L32R
415 instructions in the code. It's unlikely that anyone would ever need
416 such a big PLT, but an arbitrary limit on the PLT size would be bad.
417 Thus, we split the PLT into chunks. Since there's very little
418 overhead (2 extra literals) for each chunk, the chunk size is kept
419 small so that the code for handling multiple chunks get used and
420 tested regularly. With 254 entries, there are 1K of literals for
421 each chunk, and that seems like a nice round number. */
423 #define PLT_ENTRIES_PER_CHUNK 254
425 /* PLT entries are actually used as stub functions for lazy symbol
426 resolution. Once the symbol is resolved, the stub function is never
427 invoked. Note: the 32-byte frame size used here cannot be changed
428 without a corresponding change in the runtime linker. */
430 static const bfd_byte elf_xtensa_be_plt_entry[PLT_ENTRY_SIZE] =
432 0x6c, 0x10, 0x04, /* entry sp, 32 */
433 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
434 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
435 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
436 0x0a, 0x80, 0x00, /* jx a8 */
440 static const bfd_byte elf_xtensa_le_plt_entry[PLT_ENTRY_SIZE] =
442 0x36, 0x41, 0x00, /* entry sp, 32 */
443 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
444 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
445 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
446 0xa0, 0x08, 0x00, /* jx a8 */
452 property_table_compare (ap, bp)
456 const property_table_entry *a = (const property_table_entry *) ap;
457 const property_table_entry *b = (const property_table_entry *) bp;
459 /* Check if one entry overlaps with the other; this shouldn't happen
460 except when searching for a match. */
461 if ((b->address >= a->address && b->address < (a->address + a->size))
462 || (a->address >= b->address && a->address < (b->address + b->size)))
465 return (a->address - b->address);
469 /* Get the literal table or instruction table entries for the given
470 section. Sets TABLE_P and returns the number of entries. On error,
471 returns a negative value. */
474 xtensa_read_table_entries (abfd, section, table_p, sec_name)
477 property_table_entry **table_p;
478 const char *sec_name;
480 asection *table_section;
481 char *table_section_name;
482 bfd_size_type table_size = 0;
483 bfd_byte *table_data;
484 property_table_entry *blocks;
486 bfd_size_type num_records;
487 Elf_Internal_Rela *internal_relocs;
490 xtensa_get_property_section_name (abfd, section, sec_name);
491 table_section = bfd_get_section_by_name (abfd, table_section_name);
492 if (table_section != NULL)
493 table_size = bfd_get_section_size_before_reloc (table_section);
501 num_records = table_size / sizeof (property_table_entry);
502 table_data = retrieve_contents (abfd, table_section, TRUE);
503 blocks = (property_table_entry *)
504 bfd_malloc (num_records * sizeof (property_table_entry));
507 /* If the file has not yet been relocated, process the relocations
508 and sort out the table entries that apply to the specified section. */
509 internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE);
514 for (i = 0; i < table_section->reloc_count; i++)
516 Elf_Internal_Rela *rel = &internal_relocs[i];
517 unsigned long r_symndx;
519 if (ELF32_R_TYPE (rel->r_info) == R_XTENSA_NONE)
522 BFD_ASSERT (ELF32_R_TYPE (rel->r_info) == R_XTENSA_32);
523 r_symndx = ELF32_R_SYM (rel->r_info);
525 if (get_elf_r_symndx_section (abfd, r_symndx) == section)
527 bfd_vma sym_off = get_elf_r_symndx_offset (abfd, r_symndx);
528 blocks[block_count].address =
529 (section->vma + sym_off + rel->r_addend
530 + bfd_get_32 (abfd, table_data + rel->r_offset));
531 blocks[block_count].size =
532 bfd_get_32 (abfd, table_data + rel->r_offset + 4);
539 /* No relocations. Presumably the file has been relocated
540 and the addresses are already in the table. */
543 for (off = 0; off < table_size; off += sizeof (property_table_entry))
545 bfd_vma address = bfd_get_32 (abfd, table_data + off);
547 if (address >= section->vma
548 && address < ( section->vma + section->_raw_size))
550 blocks[block_count].address = address;
551 blocks[block_count].size =
552 bfd_get_32 (abfd, table_data + off + 4);
558 release_contents (table_section, table_data);
559 release_internal_relocs (table_section, internal_relocs);
563 /* Now sort them into address order for easy reference. */
564 qsort (blocks, block_count, sizeof (property_table_entry),
565 property_table_compare);
574 elf_xtensa_in_literal_pool (lit_table, lit_table_size, addr)
575 property_table_entry *lit_table;
579 property_table_entry entry;
581 if (lit_table_size == 0)
584 entry.address = addr;
587 if (bsearch (&entry, lit_table, lit_table_size,
588 sizeof (property_table_entry), property_table_compare))
595 /* Look through the relocs for a section during the first phase, and
596 calculate needed space in the dynamic reloc sections. */
599 elf_xtensa_check_relocs (abfd, info, sec, relocs)
601 struct bfd_link_info *info;
603 const Elf_Internal_Rela *relocs;
605 Elf_Internal_Shdr *symtab_hdr;
606 struct elf_link_hash_entry **sym_hashes;
607 const Elf_Internal_Rela *rel;
608 const Elf_Internal_Rela *rel_end;
609 property_table_entry *lit_table;
612 if (info->relocateable)
615 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
616 sym_hashes = elf_sym_hashes (abfd);
618 ltblsize = xtensa_read_table_entries (abfd, sec, &lit_table,
619 XTENSA_LIT_SEC_NAME);
623 rel_end = relocs + sec->reloc_count;
624 for (rel = relocs; rel < rel_end; rel++)
627 unsigned long r_symndx;
628 struct elf_link_hash_entry *h;
630 r_symndx = ELF32_R_SYM (rel->r_info);
631 r_type = ELF32_R_TYPE (rel->r_info);
633 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
635 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
636 bfd_archive_filename (abfd),
641 if (r_symndx < symtab_hdr->sh_info)
645 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
646 while (h->root.type == bfd_link_hash_indirect
647 || h->root.type == bfd_link_hash_warning)
648 h = (struct elf_link_hash_entry *) h->root.u.i.link;
657 if ((sec->flags & SEC_ALLOC) != 0)
659 if ((sec->flags & SEC_READONLY) != 0
660 && !elf_xtensa_in_literal_pool (lit_table, ltblsize,
661 sec->vma + rel->r_offset))
662 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
664 if (h->got.refcount <= 0)
667 h->got.refcount += 1;
672 /* If this relocation is against a local symbol, then it's
673 exactly the same as a normal local GOT entry. */
677 if ((sec->flags & SEC_ALLOC) != 0)
679 if ((sec->flags & SEC_READONLY) != 0
680 && !elf_xtensa_in_literal_pool (lit_table, ltblsize,
681 sec->vma + rel->r_offset))
682 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
684 if (h->plt.refcount <= 0)
686 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
690 h->plt.refcount += 1;
692 /* Keep track of the total PLT relocation count even if we
693 don't yet know whether the dynamic sections will be
695 plt_reloc_count += 1;
697 if (elf_hash_table (info)->dynamic_sections_created)
699 if (!add_extra_plt_sections (elf_hash_table (info)->dynobj,
707 if ((sec->flags & SEC_ALLOC) != 0)
709 bfd_signed_vma *local_got_refcounts;
711 /* This is a global offset table entry for a local symbol. */
712 local_got_refcounts = elf_local_got_refcounts (abfd);
713 if (local_got_refcounts == NULL)
717 size = symtab_hdr->sh_info;
718 size *= sizeof (bfd_signed_vma);
719 local_got_refcounts = ((bfd_signed_vma *)
720 bfd_zalloc (abfd, size));
721 if (local_got_refcounts == NULL)
723 elf_local_got_refcounts (abfd) = local_got_refcounts;
725 local_got_refcounts[r_symndx] += 1;
727 /* If the relocation is not inside the GOT, the DF_TEXTREL
728 flag needs to be set. */
730 && (sec->flags & SEC_READONLY) != 0
731 && !elf_xtensa_in_literal_pool (lit_table, ltblsize,
732 sec->vma + rel->r_offset))
733 info->flags |= DF_TEXTREL;
740 case R_XTENSA_ASM_EXPAND:
741 case R_XTENSA_ASM_SIMPLIFY:
742 /* Nothing to do for these. */
745 case R_XTENSA_GNU_VTINHERIT:
746 /* This relocation describes the C++ object vtable hierarchy.
747 Reconstruct it for later use during GC. */
748 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
752 case R_XTENSA_GNU_VTENTRY:
753 /* This relocation describes which C++ vtable entries are actually
754 used. Record for later use during GC. */
755 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
770 elf_xtensa_hide_symbol (info, h, force_local)
771 struct bfd_link_info *info;
772 struct elf_link_hash_entry *h;
773 bfd_boolean force_local;
775 /* For a shared link, move the plt refcount to the got refcount to leave
776 space for RELATIVE relocs. */
777 elf_xtensa_make_sym_local (info, h);
779 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
784 elf_xtensa_copy_indirect_symbol (bed, dir, ind)
785 struct elf_backend_data *bed;
786 struct elf_link_hash_entry *dir, *ind;
788 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
790 /* The standard function doesn't copy the NEEDS_PLT flag. */
791 dir->elf_link_hash_flags |=
792 (ind->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT);
796 /* Return the section that should be marked against GC for a given
800 elf_xtensa_gc_mark_hook (sec, info, rel, h, sym)
802 struct bfd_link_info *info ATTRIBUTE_UNUSED;
803 Elf_Internal_Rela *rel;
804 struct elf_link_hash_entry *h;
805 Elf_Internal_Sym *sym;
809 switch (ELF32_R_TYPE (rel->r_info))
811 case R_XTENSA_GNU_VTINHERIT:
812 case R_XTENSA_GNU_VTENTRY:
816 switch (h->root.type)
818 case bfd_link_hash_defined:
819 case bfd_link_hash_defweak:
820 return h->root.u.def.section;
822 case bfd_link_hash_common:
823 return h->root.u.c.p->section;
831 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
836 /* Update the GOT & PLT entry reference counts
837 for the section being removed. */
840 elf_xtensa_gc_sweep_hook (abfd, info, sec, relocs)
842 struct bfd_link_info *info ATTRIBUTE_UNUSED;
844 const Elf_Internal_Rela *relocs;
846 Elf_Internal_Shdr *symtab_hdr;
847 struct elf_link_hash_entry **sym_hashes;
848 bfd_signed_vma *local_got_refcounts;
849 const Elf_Internal_Rela *rel, *relend;
851 if ((sec->flags & SEC_ALLOC) == 0)
854 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
855 sym_hashes = elf_sym_hashes (abfd);
856 local_got_refcounts = elf_local_got_refcounts (abfd);
858 relend = relocs + sec->reloc_count;
859 for (rel = relocs; rel < relend; rel++)
861 unsigned long r_symndx;
863 struct elf_link_hash_entry *h = NULL;
865 r_symndx = ELF32_R_SYM (rel->r_info);
866 if (r_symndx >= symtab_hdr->sh_info)
867 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
869 r_type = ELF32_R_TYPE (rel->r_info);
875 if (h->got.refcount > 0)
882 if (h->plt.refcount > 0)
887 if (local_got_refcounts[r_symndx] > 0)
888 local_got_refcounts[r_symndx] -= 1;
900 /* Create all the dynamic sections. */
903 elf_xtensa_create_dynamic_sections (dynobj, info)
905 struct bfd_link_info *info;
910 /* First do all the standard stuff. */
911 if (! _bfd_elf_create_dynamic_sections (dynobj, info))
914 /* Create any extra PLT sections in case check_relocs has already
915 been called on all the non-dynamic input files. */
916 if (!add_extra_plt_sections (dynobj, plt_reloc_count))
919 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
920 | SEC_LINKER_CREATED | SEC_READONLY);
922 /* Mark the ".got.plt" section READONLY. */
923 s = bfd_get_section_by_name (dynobj, ".got.plt");
925 || ! bfd_set_section_flags (dynobj, s, flags))
928 /* Create ".rela.got". */
929 s = bfd_make_section (dynobj, ".rela.got");
931 || ! bfd_set_section_flags (dynobj, s, flags)
932 || ! bfd_set_section_alignment (dynobj, s, 2))
935 /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */
936 s = bfd_make_section (dynobj, ".xt.lit.plt");
938 || ! bfd_set_section_flags (dynobj, s, flags)
939 || ! bfd_set_section_alignment (dynobj, s, 2))
947 add_extra_plt_sections (dynobj, count)
953 /* Iterate over all chunks except 0 which uses the standard ".plt" and
954 ".got.plt" sections. */
955 for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--)
961 /* Stop when we find a section has already been created. */
962 if (elf_xtensa_get_plt_section (dynobj, chunk))
965 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
966 | SEC_LINKER_CREATED | SEC_READONLY);
968 sname = (char *) bfd_malloc (10);
969 sprintf (sname, ".plt.%u", chunk);
970 s = bfd_make_section (dynobj, sname);
972 || ! bfd_set_section_flags (dynobj, s, flags | SEC_CODE)
973 || ! bfd_set_section_alignment (dynobj, s, 2))
976 sname = (char *) bfd_malloc (14);
977 sprintf (sname, ".got.plt.%u", chunk);
978 s = bfd_make_section (dynobj, sname);
980 || ! bfd_set_section_flags (dynobj, s, flags)
981 || ! bfd_set_section_alignment (dynobj, s, 2))
989 /* Adjust a symbol defined by a dynamic object and referenced by a
990 regular object. The current definition is in some section of the
991 dynamic object, but we're not including those sections. We have to
992 change the definition to something the rest of the link can
996 elf_xtensa_adjust_dynamic_symbol (info, h)
997 struct bfd_link_info *info ATTRIBUTE_UNUSED;
998 struct elf_link_hash_entry *h;
1000 /* If this is a weak symbol, and there is a real definition, the
1001 processor independent code will have arranged for us to see the
1002 real definition first, and we can just use the same value. */
1003 if (h->weakdef != NULL)
1005 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1006 || h->weakdef->root.type == bfd_link_hash_defweak);
1007 h->root.u.def.section = h->weakdef->root.u.def.section;
1008 h->root.u.def.value = h->weakdef->root.u.def.value;
1012 /* This is a reference to a symbol defined by a dynamic object. The
1013 reference must go through the GOT, so there's no need for COPY relocs,
1021 elf_xtensa_make_sym_local (info, h)
1022 struct bfd_link_info *info;
1023 struct elf_link_hash_entry *h;
1027 if (h->plt.refcount > 0)
1029 /* Will use RELATIVE relocs instead of JMP_SLOT relocs. */
1030 if (h->got.refcount < 0)
1031 h->got.refcount = 0;
1032 h->got.refcount += h->plt.refcount;
1033 h->plt.refcount = 0;
1038 /* Don't need any dynamic relocations at all. */
1039 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1040 h->plt.refcount = 0;
1041 h->got.refcount = 0;
1047 elf_xtensa_fix_refcounts (h, arg)
1048 struct elf_link_hash_entry *h;
1051 struct bfd_link_info *info = (struct bfd_link_info *) arg;
1053 if (h->root.type == bfd_link_hash_warning)
1054 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1056 if (! xtensa_elf_dynamic_symbol_p (info, h))
1057 elf_xtensa_make_sym_local (info, h);
1059 /* If the symbol has a relocation outside the GOT, set the
1061 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) != 0)
1062 info->flags |= DF_TEXTREL;
1069 elf_xtensa_allocate_plt_size (h, arg)
1070 struct elf_link_hash_entry *h;
1073 asection *srelplt = (asection *) arg;
1075 if (h->root.type == bfd_link_hash_warning)
1076 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1078 if (h->plt.refcount > 0)
1079 srelplt->_raw_size += (h->plt.refcount * sizeof (Elf32_External_Rela));
1086 elf_xtensa_allocate_got_size (h, arg)
1087 struct elf_link_hash_entry *h;
1090 asection *srelgot = (asection *) arg;
1092 if (h->root.type == bfd_link_hash_warning)
1093 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1095 if (h->got.refcount > 0)
1096 srelgot->_raw_size += (h->got.refcount * sizeof (Elf32_External_Rela));
1103 elf_xtensa_allocate_local_got_size (info, srelgot)
1104 struct bfd_link_info *info;
1109 for (i = info->input_bfds; i; i = i->link_next)
1111 bfd_signed_vma *local_got_refcounts;
1112 bfd_size_type j, cnt;
1113 Elf_Internal_Shdr *symtab_hdr;
1115 local_got_refcounts = elf_local_got_refcounts (i);
1116 if (!local_got_refcounts)
1119 symtab_hdr = &elf_tdata (i)->symtab_hdr;
1120 cnt = symtab_hdr->sh_info;
1122 for (j = 0; j < cnt; ++j)
1124 if (local_got_refcounts[j] > 0)
1125 srelgot->_raw_size += (local_got_refcounts[j]
1126 * sizeof (Elf32_External_Rela));
1132 /* Set the sizes of the dynamic sections. */
1135 elf_xtensa_size_dynamic_sections (output_bfd, info)
1136 bfd *output_bfd ATTRIBUTE_UNUSED;
1137 struct bfd_link_info *info;
1140 asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl;
1141 bfd_boolean relplt, relgot;
1142 int plt_entries, plt_chunks, chunk;
1148 dynobj = elf_hash_table (info)->dynobj;
1152 if (elf_hash_table (info)->dynamic_sections_created)
1154 /* Set the contents of the .interp section to the interpreter. */
1157 s = bfd_get_section_by_name (dynobj, ".interp");
1160 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1161 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1164 /* Allocate room for one word in ".got". */
1165 s = bfd_get_section_by_name (dynobj, ".got");
1170 /* Adjust refcounts for symbols that we now know are not "dynamic". */
1171 elf_link_hash_traverse (elf_hash_table (info),
1172 elf_xtensa_fix_refcounts,
1175 /* Allocate space in ".rela.got" for literals that reference
1177 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1178 if (srelgot == NULL)
1180 elf_link_hash_traverse (elf_hash_table (info),
1181 elf_xtensa_allocate_got_size,
1184 /* If we are generating a shared object, we also need space in
1185 ".rela.got" for R_XTENSA_RELATIVE relocs for literals that
1186 reference local symbols. */
1188 elf_xtensa_allocate_local_got_size (info, srelgot);
1190 /* Allocate space in ".rela.plt" for literals that have PLT entries. */
1191 srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
1192 if (srelplt == NULL)
1194 elf_link_hash_traverse (elf_hash_table (info),
1195 elf_xtensa_allocate_plt_size,
1198 /* Allocate space in ".plt" to match the size of ".rela.plt". For
1199 each PLT entry, we need the PLT code plus a 4-byte literal.
1200 For each chunk of ".plt", we also need two more 4-byte
1201 literals, two corresponding entries in ".rela.got", and an
1202 8-byte entry in ".xt.lit.plt". */
1203 spltlittbl = bfd_get_section_by_name (dynobj, ".xt.lit.plt");
1204 if (spltlittbl == NULL)
1207 plt_entries = srelplt->_raw_size / sizeof (Elf32_External_Rela);
1209 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
1211 /* Iterate over all the PLT chunks, including any extra sections
1212 created earlier because the initial count of PLT relocations
1213 was an overestimate. */
1215 (splt = elf_xtensa_get_plt_section (dynobj, chunk)) != NULL;
1220 sgotplt = elf_xtensa_get_gotplt_section (dynobj, chunk);
1221 if (sgotplt == NULL)
1224 if (chunk < plt_chunks - 1)
1225 chunk_entries = PLT_ENTRIES_PER_CHUNK;
1226 else if (chunk == plt_chunks - 1)
1227 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
1231 if (chunk_entries != 0)
1233 sgotplt->_raw_size = 4 * (chunk_entries + 2);
1234 splt->_raw_size = PLT_ENTRY_SIZE * chunk_entries;
1235 srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela);
1236 spltlittbl->_raw_size += 8;
1240 sgotplt->_raw_size = 0;
1241 splt->_raw_size = 0;
1246 /* Allocate memory for dynamic sections. */
1249 for (s = dynobj->sections; s != NULL; s = s->next)
1254 if ((s->flags & SEC_LINKER_CREATED) == 0)
1257 /* It's OK to base decisions on the section name, because none
1258 of the dynobj section names depend upon the input files. */
1259 name = bfd_get_section_name (dynobj, s);
1263 if (strncmp (name, ".rela", 5) == 0)
1265 if (strcmp (name, ".rela.plt") == 0)
1267 else if (strcmp (name, ".rela.got") == 0)
1270 /* We use the reloc_count field as a counter if we need
1271 to copy relocs into the output file. */
1274 else if (strncmp (name, ".plt.", 5) == 0
1275 || strncmp (name, ".got.plt.", 9) == 0)
1277 if (s->_raw_size == 0)
1279 /* If we don't need this section, strip it from the output
1280 file. We must create the ".plt*" and ".got.plt*"
1281 sections in create_dynamic_sections and/or check_relocs
1282 based on a conservative estimate of the PLT relocation
1283 count, because the sections must be created before the
1284 linker maps input sections to output sections. The
1285 linker does that before size_dynamic_sections, where we
1286 compute the exact size of the PLT, so there may be more
1287 of these sections than are actually needed. */
1291 else if (strcmp (name, ".got") != 0
1292 && strcmp (name, ".plt") != 0
1293 && strcmp (name, ".got.plt") != 0
1294 && strcmp (name, ".xt.lit.plt") != 0)
1296 /* It's not one of our sections, so don't allocate space. */
1301 _bfd_strip_section_from_output (info, s);
1304 /* Allocate memory for the section contents. */
1305 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1306 if (s->contents == NULL && s->_raw_size != 0)
1311 if (elf_hash_table (info)->dynamic_sections_created)
1313 /* Add the special XTENSA_RTLD relocations now. The offsets won't be
1314 known until finish_dynamic_sections, but we need to get the relocs
1315 in place before they are sorted. */
1316 if (srelgot == NULL)
1318 for (chunk = 0; chunk < plt_chunks; chunk++)
1320 Elf_Internal_Rela irela;
1324 irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD);
1327 loc = (srelgot->contents
1328 + srelgot->reloc_count * sizeof (Elf32_External_Rela));
1329 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
1330 bfd_elf32_swap_reloca_out (output_bfd, &irela,
1331 loc + sizeof (Elf32_External_Rela));
1332 srelgot->reloc_count += 2;
1335 /* Add some entries to the .dynamic section. We fill in the
1336 values later, in elf_xtensa_finish_dynamic_sections, but we
1337 must add the entries now so that we get the correct size for
1338 the .dynamic section. The DT_DEBUG entry is filled in by the
1339 dynamic linker and used by the debugger. */
1340 #define add_dynamic_entry(TAG, VAL) \
1341 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1345 if (!add_dynamic_entry (DT_DEBUG, 0))
1351 if (!add_dynamic_entry (DT_PLTGOT, 0)
1352 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1353 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1354 || !add_dynamic_entry (DT_JMPREL, 0))
1360 if (!add_dynamic_entry (DT_RELA, 0)
1361 || !add_dynamic_entry (DT_RELASZ, 0)
1362 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1366 if ((info->flags & DF_TEXTREL) != 0)
1368 if (!add_dynamic_entry (DT_TEXTREL, 0))
1372 if (!add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0)
1373 || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0))
1376 #undef add_dynamic_entry
1382 /* Remove any PT_LOAD segments with no allocated sections. Prior to
1383 binutils 2.13, this function used to remove the non-SEC_ALLOC
1384 sections from PT_LOAD segments, but that task has now been moved
1385 into elf.c. We still need this function to remove any empty
1386 segments that result, but there's nothing Xtensa-specific about
1387 this and it probably ought to be moved into elf.c as well. */
1390 elf_xtensa_modify_segment_map (abfd)
1393 struct elf_segment_map **m_p;
1395 m_p = &elf_tdata (abfd)->segment_map;
1396 while (*m_p != NULL)
1398 if ((*m_p)->p_type == PT_LOAD && (*m_p)->count == 0)
1399 *m_p = (*m_p)->next;
1401 m_p = &(*m_p)->next;
1407 /* Perform the specified relocation. The instruction at (contents + address)
1408 is modified to set one operand to represent the value in "relocation". The
1409 operand position is determined by the relocation type recorded in the
1412 #define CALL_SEGMENT_BITS (30)
1413 #define CALL_SEGMENT_SIZE (1<<CALL_SEGMENT_BITS)
1415 static bfd_reloc_status_type
1416 elf_xtensa_do_reloc (howto, abfd, input_section, relocation,
1417 contents, address, is_weak_undef, error_message)
1418 reloc_howto_type *howto;
1420 asection *input_section;
1424 bfd_boolean is_weak_undef;
1425 char **error_message;
1427 xtensa_opcode opcode;
1428 xtensa_operand operand;
1429 xtensa_encode_result encode_result;
1430 xtensa_isa isa = xtensa_default_isa;
1431 xtensa_insnbuf ibuff;
1432 bfd_vma self_address;
1436 switch (howto->type)
1439 return bfd_reloc_ok;
1441 case R_XTENSA_ASM_EXPAND:
1444 /* Check for windowed CALL across a 1GB boundary. */
1445 xtensa_opcode opcode =
1446 get_expanded_call_opcode (contents + address,
1447 input_section->_raw_size - address);
1448 if (is_windowed_call_opcode (opcode))
1450 self_address = (input_section->output_section->vma
1451 + input_section->output_offset
1453 if ((self_address >> CALL_SEGMENT_BITS) !=
1454 (relocation >> CALL_SEGMENT_BITS))
1456 *error_message = "windowed longcall crosses 1GB boundary; "
1458 return bfd_reloc_dangerous;
1462 return bfd_reloc_ok;
1464 case R_XTENSA_ASM_SIMPLIFY:
1466 /* Convert the L32R/CALLX to CALL. */
1467 bfd_reloc_status_type retval =
1468 elf_xtensa_do_asm_simplify (contents, address,
1469 input_section->_raw_size);
1470 if (retval != bfd_reloc_ok)
1473 /* The CALL needs to be relocated. Continue below for that part. */
1475 howto = &elf_howto_table[(unsigned) R_XTENSA_OP0 ];
1483 x = bfd_get_32 (abfd, contents + address);
1485 bfd_put_32 (abfd, x, contents + address);
1487 return bfd_reloc_ok;
1490 /* Read the instruction into a buffer and decode the opcode. */
1491 ibuff = xtensa_insnbuf_alloc (isa);
1492 xtensa_insnbuf_from_chars (isa, ibuff, contents + address);
1493 opcode = xtensa_decode_insn (isa, ibuff);
1495 /* Determine which operand is being relocated. */
1496 if (opcode == XTENSA_UNDEFINED)
1498 *error_message = "cannot decode instruction";
1499 return bfd_reloc_dangerous;
1502 if (howto->type < R_XTENSA_OP0 || howto->type > R_XTENSA_OP2)
1504 *error_message = "unexpected relocation";
1505 return bfd_reloc_dangerous;
1508 opnd = howto->type - R_XTENSA_OP0;
1510 /* Calculate the PC address for this instruction. */
1511 if (!howto->pc_relative)
1513 *error_message = "expected PC-relative relocation";
1514 return bfd_reloc_dangerous;
1517 self_address = (input_section->output_section->vma
1518 + input_section->output_offset
1521 /* Apply the relocation. */
1522 operand = xtensa_get_operand (isa, opcode, opnd);
1523 newval = xtensa_operand_do_reloc (operand, relocation, self_address);
1524 encode_result = xtensa_operand_encode (operand, &newval);
1525 xtensa_operand_set_field (operand, ibuff, newval);
1527 /* Write the modified instruction back out of the buffer. */
1528 xtensa_insnbuf_to_chars (isa, ibuff, contents + address);
1531 if (encode_result != xtensa_encode_result_ok)
1533 char *message = build_encoding_error_message (opcode, encode_result);
1534 *error_message = message;
1535 return bfd_reloc_dangerous;
1538 /* Final check for call. */
1539 if (is_direct_call_opcode (opcode)
1540 && is_windowed_call_opcode (opcode))
1542 if ((self_address >> CALL_SEGMENT_BITS) !=
1543 (relocation >> CALL_SEGMENT_BITS))
1545 *error_message = "windowed call crosses 1GB boundary; "
1547 return bfd_reloc_dangerous;
1551 return bfd_reloc_ok;
1556 vsprint_msg VPARAMS ((const char *origmsg, const char *fmt, int arglen, ...))
1558 /* To reduce the size of the memory leak,
1559 we only use a single message buffer. */
1560 static bfd_size_type alloc_size = 0;
1561 static char *message = NULL;
1562 bfd_size_type orig_len, len = 0;
1563 bfd_boolean is_append;
1565 VA_OPEN (ap, arglen);
1566 VA_FIXEDARG (ap, const char *, origmsg);
1568 is_append = (origmsg == message);
1570 orig_len = strlen (origmsg);
1571 len = orig_len + strlen (fmt) + arglen + 20;
1572 if (len > alloc_size)
1574 message = (char *) bfd_realloc (message, len);
1578 memcpy (message, origmsg, orig_len);
1579 vsprintf (message + orig_len, fmt, ap);
1586 build_encoding_error_message (opcode, encode_result)
1587 xtensa_opcode opcode;
1588 xtensa_encode_result encode_result;
1590 const char *opname = xtensa_opcode_name (xtensa_default_isa, opcode);
1591 const char *msg = NULL;
1593 switch (encode_result)
1595 case xtensa_encode_result_ok:
1596 msg = "unexpected valid encoding";
1598 case xtensa_encode_result_align:
1599 msg = "misaligned encoding";
1601 case xtensa_encode_result_not_in_table:
1602 msg = "encoding not in lookup table";
1604 case xtensa_encode_result_too_low:
1605 msg = "encoding out of range: too low";
1607 case xtensa_encode_result_too_high:
1608 msg = "encoding out of range: too high";
1610 case xtensa_encode_result_not_ok:
1612 msg = "could not encode";
1616 if (is_direct_call_opcode (opcode)
1617 && (encode_result == xtensa_encode_result_too_low
1618 || encode_result == xtensa_encode_result_too_high))
1620 msg = "direct call out of range";
1622 else if (opcode == get_l32r_opcode ())
1624 /* L32Rs have the strange interaction with encoding in that they
1625 have an unsigned immediate field, so libisa returns "too high"
1626 when the absolute value is out of range and never returns "too
1627 low", but I leave the "too low" message in case anything
1629 if (encode_result == xtensa_encode_result_too_low)
1630 msg = "literal out of range";
1631 else if (encode_result == xtensa_encode_result_too_high)
1632 msg = "literal placed after use";
1635 return vsprint_msg (opname, ": %s", strlen (msg) + 2, msg);
1639 /* This function is registered as the "special_function" in the
1640 Xtensa howto for handling simplify operations.
1641 bfd_perform_relocation / bfd_install_relocation use it to
1642 perform (install) the specified relocation. Since this replaces the code
1643 in bfd_perform_relocation, it is basically an Xtensa-specific,
1644 stripped-down version of bfd_perform_relocation. */
1646 static bfd_reloc_status_type
1647 bfd_elf_xtensa_reloc (abfd, reloc_entry, symbol, data, input_section,
1648 output_bfd, error_message)
1650 arelent *reloc_entry;
1653 asection *input_section;
1655 char **error_message;
1658 bfd_reloc_status_type flag;
1659 bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1660 bfd_vma output_base = 0;
1661 reloc_howto_type *howto = reloc_entry->howto;
1662 asection *reloc_target_output_section;
1663 bfd_boolean is_weak_undef;
1665 /* ELF relocs are against symbols. If we are producing relocateable
1666 output, and the reloc is against an external symbol, the resulting
1667 reloc will also be against the same symbol. In such a case, we
1668 don't want to change anything about the way the reloc is handled,
1669 since it will all be done at final link time. This test is similar
1670 to what bfd_elf_generic_reloc does except that it lets relocs with
1671 howto->partial_inplace go through even if the addend is non-zero.
1672 (The real problem is that partial_inplace is set for XTENSA_32
1673 relocs to begin with, but that's a long story and there's little we
1674 can do about it now....) */
1676 if (output_bfd != (bfd *) NULL
1677 && (symbol->flags & BSF_SECTION_SYM) == 0)
1679 reloc_entry->address += input_section->output_offset;
1680 return bfd_reloc_ok;
1683 /* Is the address of the relocation really within the section? */
1684 if (reloc_entry->address > (input_section->_cooked_size
1685 / bfd_octets_per_byte (abfd)))
1686 return bfd_reloc_outofrange;
1688 /* Work out which section the relocation is targetted at and the
1689 initial relocation command value. */
1691 /* Get symbol value. (Common symbols are special.) */
1692 if (bfd_is_com_section (symbol->section))
1695 relocation = symbol->value;
1697 reloc_target_output_section = symbol->section->output_section;
1699 /* Convert input-section-relative symbol value to absolute. */
1700 if ((output_bfd && !howto->partial_inplace)
1701 || reloc_target_output_section == NULL)
1704 output_base = reloc_target_output_section->vma;
1706 relocation += output_base + symbol->section->output_offset;
1708 /* Add in supplied addend. */
1709 relocation += reloc_entry->addend;
1711 /* Here the variable relocation holds the final address of the
1712 symbol we are relocating against, plus any addend. */
1715 if (!howto->partial_inplace)
1717 /* This is a partial relocation, and we want to apply the relocation
1718 to the reloc entry rather than the raw data. Everything except
1719 relocations against section symbols has already been handled
1722 BFD_ASSERT (symbol->flags & BSF_SECTION_SYM);
1723 reloc_entry->addend = relocation;
1724 reloc_entry->address += input_section->output_offset;
1725 return bfd_reloc_ok;
1729 reloc_entry->address += input_section->output_offset;
1730 reloc_entry->addend = 0;
1734 is_weak_undef = (bfd_is_und_section (symbol->section)
1735 && (symbol->flags & BSF_WEAK) != 0);
1736 flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation,
1737 (bfd_byte *) data, (bfd_vma) octets,
1738 is_weak_undef, error_message);
1740 if (flag == bfd_reloc_dangerous)
1742 /* Add the symbol name to the error message. */
1743 if (! *error_message)
1744 *error_message = "";
1745 *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)",
1746 strlen (symbol->name) + 17,
1747 symbol->name, reloc_entry->addend);
1754 /* Set up an entry in the procedure linkage table. */
1757 elf_xtensa_create_plt_entry (dynobj, output_bfd, reloc_index)
1760 unsigned reloc_index;
1762 asection *splt, *sgotplt;
1763 bfd_vma plt_base, got_base;
1764 bfd_vma code_offset, lit_offset;
1767 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
1768 splt = elf_xtensa_get_plt_section (dynobj, chunk);
1769 sgotplt = elf_xtensa_get_gotplt_section (dynobj, chunk);
1770 BFD_ASSERT (splt != NULL && sgotplt != NULL);
1772 plt_base = splt->output_section->vma + splt->output_offset;
1773 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1775 lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4;
1776 code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE;
1778 /* Fill in the literal entry. This is the offset of the dynamic
1779 relocation entry. */
1780 bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela),
1781 sgotplt->contents + lit_offset);
1783 /* Fill in the entry in the procedure linkage table. */
1784 memcpy (splt->contents + code_offset,
1785 (bfd_big_endian (output_bfd)
1786 ? elf_xtensa_be_plt_entry
1787 : elf_xtensa_le_plt_entry),
1789 bfd_put_16 (output_bfd, l32r_offset (got_base + 0,
1790 plt_base + code_offset + 3),
1791 splt->contents + code_offset + 4);
1792 bfd_put_16 (output_bfd, l32r_offset (got_base + 4,
1793 plt_base + code_offset + 6),
1794 splt->contents + code_offset + 7);
1795 bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset,
1796 plt_base + code_offset + 9),
1797 splt->contents + code_offset + 10);
1799 return plt_base + code_offset;
1804 xtensa_elf_dynamic_symbol_p (info, h)
1805 struct bfd_link_info *info;
1806 struct elf_link_hash_entry *h;
1811 while (h->root.type == bfd_link_hash_indirect
1812 || h->root.type == bfd_link_hash_warning)
1813 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1815 if (h->dynindx == -1)
1818 if (h->root.type == bfd_link_hash_undefweak
1819 || h->root.type == bfd_link_hash_defweak)
1822 switch (ELF_ST_VISIBILITY (h->other))
1830 if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
1835 if ((info->shared && !info->symbolic)
1836 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1843 /* Relocate an Xtensa ELF section. This is invoked by the linker for
1844 both relocateable and final links. */
1847 elf_xtensa_relocate_section (output_bfd, info, input_bfd,
1848 input_section, contents, relocs,
1849 local_syms, local_sections)
1851 struct bfd_link_info *info;
1853 asection *input_section;
1855 Elf_Internal_Rela *relocs;
1856 Elf_Internal_Sym *local_syms;
1857 asection **local_sections;
1859 Elf_Internal_Shdr *symtab_hdr;
1860 Elf_Internal_Rela *rel;
1861 Elf_Internal_Rela *relend;
1862 struct elf_link_hash_entry **sym_hashes;
1863 asection *srelgot, *srelplt;
1865 char *error_message = NULL;
1867 if (xtensa_default_isa == NULL)
1870 dynobj = elf_hash_table (info)->dynobj;
1871 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1872 sym_hashes = elf_sym_hashes (input_bfd);
1878 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");;
1879 srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
1883 relend = relocs + input_section->reloc_count;
1884 for (; rel < relend; rel++)
1887 reloc_howto_type *howto;
1888 unsigned long r_symndx;
1889 struct elf_link_hash_entry *h;
1890 Elf_Internal_Sym *sym;
1893 bfd_reloc_status_type r;
1894 bfd_boolean is_weak_undef;
1895 bfd_boolean unresolved_reloc;
1897 r_type = ELF32_R_TYPE (rel->r_info);
1898 if (r_type == (int) R_XTENSA_GNU_VTINHERIT
1899 || r_type == (int) R_XTENSA_GNU_VTENTRY)
1902 if (r_type < 0 || r_type >= (int) R_XTENSA_max)
1904 bfd_set_error (bfd_error_bad_value);
1907 howto = &elf_howto_table[r_type];
1909 r_symndx = ELF32_R_SYM (rel->r_info);
1911 if (info->relocateable)
1913 /* This is a relocateable link.
1914 1) If the reloc is against a section symbol, adjust
1915 according to the output section.
1916 2) If there is a new target for this relocation,
1917 the new target will be in the same output section.
1918 We adjust the relocation by the output section
1921 if (relaxing_section)
1923 /* Check if this references a section in another input file. */
1924 do_fix_for_relocateable_link (rel, input_bfd, input_section);
1925 r_type = ELF32_R_TYPE (rel->r_info);
1928 if (r_type == R_XTENSA_ASM_SIMPLIFY)
1930 /* Convert ASM_SIMPLIFY into the simpler relocation
1931 so that they never escape a relaxing link. */
1932 contract_asm_expansion (contents, input_section->_raw_size, rel);
1933 r_type = ELF32_R_TYPE (rel->r_info);
1936 /* This is a relocateable link, so we don't have to change
1937 anything unless the reloc is against a section symbol,
1938 in which case we have to adjust according to where the
1939 section symbol winds up in the output section. */
1940 if (r_symndx < symtab_hdr->sh_info)
1942 sym = local_syms + r_symndx;
1943 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1945 sec = local_sections[r_symndx];
1946 rel->r_addend += sec->output_offset + sym->st_value;
1950 /* If there is an addend with a partial_inplace howto,
1951 then move the addend to the contents. This is a hack
1952 to work around problems with DWARF in relocateable links
1953 with some previous version of BFD. Now we can't easily get
1954 rid of the hack without breaking backward compatibility.... */
1957 howto = &elf_howto_table[r_type];
1958 if (howto->partial_inplace)
1960 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
1961 rel->r_addend, contents,
1962 rel->r_offset, FALSE,
1964 if (r != bfd_reloc_ok)
1966 if (!((*info->callbacks->reloc_dangerous)
1967 (info, error_message, input_bfd, input_section,
1975 /* Done with work for relocateable link; continue with next reloc. */
1979 /* This is a final link. */
1984 is_weak_undef = FALSE;
1985 unresolved_reloc = FALSE;
1987 if (howto->partial_inplace)
1989 /* Because R_XTENSA_32 was made partial_inplace to fix some
1990 problems with DWARF info in partial links, there may be
1991 an addend stored in the contents. Take it out of there
1992 and move it back into the addend field of the reloc. */
1993 rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset);
1994 bfd_put_32 (input_bfd, 0, contents + rel->r_offset);
1997 if (r_symndx < symtab_hdr->sh_info)
1999 sym = local_syms + r_symndx;
2000 sec = local_sections[r_symndx];
2001 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
2005 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2007 while (h->root.type == bfd_link_hash_indirect
2008 || h->root.type == bfd_link_hash_warning)
2009 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2012 if (h->root.type == bfd_link_hash_defined
2013 || h->root.type == bfd_link_hash_defweak)
2015 sec = h->root.u.def.section;
2017 if (sec->output_section == NULL)
2018 /* Set a flag that will be cleared later if we find a
2019 relocation value for this symbol. output_section
2020 is typically NULL for symbols satisfied by a shared
2022 unresolved_reloc = TRUE;
2024 relocation = (h->root.u.def.value
2025 + sec->output_section->vma
2026 + sec->output_offset);
2028 else if (h->root.type == bfd_link_hash_undefweak)
2029 is_weak_undef = TRUE;
2030 else if (info->shared
2031 && !info->no_undefined
2032 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2036 if (! ((*info->callbacks->undefined_symbol)
2037 (info, h->root.root.string, input_bfd,
2038 input_section, rel->r_offset,
2039 (!info->shared || info->no_undefined
2040 || ELF_ST_VISIBILITY (h->other)))))
2043 /* To avoid any more warning messages, like "call out of
2044 range", we continue immediately to the next relocation. */
2049 if (relaxing_section)
2051 /* Check if this references a section in another input file. */
2052 do_fix_for_final_link (rel, input_section, &relocation);
2054 /* Update some already cached values. */
2055 r_type = ELF32_R_TYPE (rel->r_info);
2056 howto = &elf_howto_table[r_type];
2059 /* Sanity check the address. */
2060 if (rel->r_offset >= input_section->_raw_size
2061 && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE)
2063 bfd_set_error (bfd_error_bad_value);
2067 /* Generate dynamic relocations. */
2068 if (elf_hash_table (info)->dynamic_sections_created)
2070 bfd_boolean dynamic_symbol = xtensa_elf_dynamic_symbol_p (info, h);
2072 if (dynamic_symbol && (r_type == R_XTENSA_OP0
2073 || r_type == R_XTENSA_OP1
2074 || r_type == R_XTENSA_OP2))
2076 /* This is an error. The symbol's real value won't be known
2077 until runtime and it's likely to be out of range anyway. */
2078 const char *name = h->root.root.string;
2079 error_message = vsprint_msg ("invalid relocation for dynamic "
2081 strlen (name) + 2, name);
2082 if (!((*info->callbacks->reloc_dangerous)
2083 (info, error_message, input_bfd, input_section,
2087 else if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT)
2088 && (input_section->flags & SEC_ALLOC) != 0
2089 && (dynamic_symbol || info->shared))
2091 Elf_Internal_Rela outrel;
2095 if (dynamic_symbol && r_type == R_XTENSA_PLT)
2100 BFD_ASSERT (srel != NULL);
2103 _bfd_elf_section_offset (output_bfd, info,
2104 input_section, rel->r_offset);
2106 if ((outrel.r_offset | 1) == (bfd_vma) -1)
2107 memset (&outrel, 0, sizeof outrel);
2110 outrel.r_offset = (input_section->output_section->vma
2111 + input_section->output_offset);
2115 outrel.r_addend = rel->r_addend;
2118 if (r_type == R_XTENSA_32)
2121 ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT);
2124 else /* r_type == R_XTENSA_PLT */
2127 ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT);
2129 /* Create the PLT entry and set the initial
2130 contents of the literal entry to the address of
2133 elf_xtensa_create_plt_entry (dynobj, output_bfd,
2136 unresolved_reloc = FALSE;
2140 /* Generate a RELATIVE relocation. */
2141 outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE);
2142 outrel.r_addend = 0;
2146 loc = (srel->contents
2147 + srel->reloc_count++ * sizeof (Elf32_External_Rela));
2148 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2149 BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count
2150 <= srel->_cooked_size);
2154 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2155 because such sections are not SEC_ALLOC and thus ld.so will
2156 not process them. */
2157 if (unresolved_reloc
2158 && !((input_section->flags & SEC_DEBUGGING) != 0
2159 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2160 (*_bfd_error_handler)
2161 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2162 bfd_archive_filename (input_bfd),
2163 bfd_get_section_name (input_bfd, input_section),
2164 (long) rel->r_offset,
2165 h->root.root.string);
2167 /* There's no point in calling bfd_perform_relocation here.
2168 Just go directly to our "special function". */
2169 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2170 relocation + rel->r_addend,
2171 contents, rel->r_offset, is_weak_undef,
2174 if (r != bfd_reloc_ok)
2178 BFD_ASSERT (r == bfd_reloc_dangerous);
2179 BFD_ASSERT (error_message != (char *) NULL);
2182 name = h->root.root.string;
2185 name = bfd_elf_string_from_elf_section
2186 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2187 if (name && *name == '\0')
2188 name = bfd_section_name (input_bfd, sec);
2191 error_message = vsprint_msg (error_message, ": %s",
2192 strlen (name), name);
2193 if (!((*info->callbacks->reloc_dangerous)
2194 (info, error_message, input_bfd, input_section,
2204 /* Finish up dynamic symbol handling. There's not much to do here since
2205 the PLT and GOT entries are all set up by relocate_section. */
2208 elf_xtensa_finish_dynamic_symbol (output_bfd, info, h, sym)
2209 bfd *output_bfd ATTRIBUTE_UNUSED;
2210 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2211 struct elf_link_hash_entry *h;
2212 Elf_Internal_Sym *sym;
2214 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
2215 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2217 /* Mark the symbol as undefined, rather than as defined in
2218 the .plt section. Leave the value alone. */
2219 sym->st_shndx = SHN_UNDEF;
2222 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2223 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2224 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2225 sym->st_shndx = SHN_ABS;
2231 /* Combine adjacent literal table entries in the output. Adjacent
2232 entries within each input section may have been removed during
2233 relaxation, but we repeat the process here, even though it's too late
2234 to shrink the output section, because it's important to minimize the
2235 number of literal table entries to reduce the start-up work for the
2236 runtime linker. Returns the number of remaining table entries or -1
2240 elf_xtensa_combine_prop_entries (output_bfd, secname)
2242 const char *secname;
2246 property_table_entry *table;
2247 bfd_size_type section_size;
2251 sec = bfd_get_section_by_name (output_bfd, secname);
2255 section_size = (sec->_cooked_size != 0 ? sec->_cooked_size : sec->_raw_size);
2256 BFD_ASSERT (section_size % 8 == 0);
2257 num = section_size / 8;
2259 contents = (bfd_byte *) bfd_malloc (section_size);
2260 table = (property_table_entry *)
2261 bfd_malloc (num * sizeof (property_table_entry));
2262 if (contents == 0 || table == 0)
2265 /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this
2266 propagates to the output section, where it doesn't really apply and
2267 where it breaks the following call to bfd_get_section_contents. */
2268 sec->flags &= ~SEC_IN_MEMORY;
2270 if (! bfd_get_section_contents (output_bfd, sec, contents, 0, section_size))
2273 /* There should never be any relocations left at this point, so this
2274 is quite a bit easier than what is done during relaxation. */
2276 /* Copy the raw contents into a property table array and sort it. */
2278 for (n = 0; n < num; n++)
2280 table[n].address = bfd_get_32 (output_bfd, &contents[offset]);
2281 table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]);
2284 qsort (table, num, sizeof (property_table_entry), property_table_compare);
2286 for (n = 0; n < num; n++)
2288 bfd_boolean remove = FALSE;
2290 if (table[n].size == 0)
2293 (table[n-1].address + table[n-1].size == table[n].address))
2295 table[n-1].size += table[n].size;
2301 for (m = n; m < num - 1; m++)
2303 table[m].address = table[m+1].address;
2304 table[m].size = table[m+1].size;
2312 /* Copy the data back to the raw contents. */
2314 for (n = 0; n < num; n++)
2316 bfd_put_32 (output_bfd, table[n].address, &contents[offset]);
2317 bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]);
2321 /* Clear the removed bytes. */
2322 if ((bfd_size_type) (num * 8) < section_size)
2324 memset (&contents[num * 8], 0, section_size - num * 8);
2325 sec->_cooked_size = num * 8;
2328 if (! bfd_set_section_contents (output_bfd, sec, contents, 0, section_size))
2336 /* Finish up the dynamic sections. */
2339 elf_xtensa_finish_dynamic_sections (output_bfd, info)
2341 struct bfd_link_info *info;
2344 asection *sdyn, *srelplt, *sgot;
2345 Elf32_External_Dyn *dyncon, *dynconend;
2346 int num_xtlit_entries;
2348 if (! elf_hash_table (info)->dynamic_sections_created)
2351 dynobj = elf_hash_table (info)->dynobj;
2352 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2353 BFD_ASSERT (sdyn != NULL);
2355 /* Set the first entry in the global offset table to the address of
2356 the dynamic section. */
2357 sgot = bfd_get_section_by_name (dynobj, ".got");
2360 BFD_ASSERT (sgot->_raw_size == 4);
2362 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2364 bfd_put_32 (output_bfd,
2365 sdyn->output_section->vma + sdyn->output_offset,
2369 srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2370 if (srelplt != NULL && srelplt->_raw_size != 0)
2372 asection *sgotplt, *srelgot, *spltlittbl;
2373 int chunk, plt_chunks, plt_entries;
2374 Elf_Internal_Rela irela;
2376 unsigned rtld_reloc;
2378 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");;
2379 BFD_ASSERT (srelgot != NULL);
2381 spltlittbl = bfd_get_section_by_name (dynobj, ".xt.lit.plt");
2382 BFD_ASSERT (spltlittbl != NULL);
2384 /* Find the first XTENSA_RTLD relocation. Presumably the rest
2385 of them follow immediately after.... */
2386 for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++)
2388 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
2389 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
2390 if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD)
2393 BFD_ASSERT (rtld_reloc < srelgot->reloc_count);
2395 plt_entries = (srelplt->_raw_size / sizeof (Elf32_External_Rela));
2397 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
2399 for (chunk = 0; chunk < plt_chunks; chunk++)
2401 int chunk_entries = 0;
2403 sgotplt = elf_xtensa_get_gotplt_section (dynobj, chunk);
2404 BFD_ASSERT (sgotplt != NULL);
2406 /* Emit special RTLD relocations for the first two entries in
2407 each chunk of the .got.plt section. */
2409 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
2410 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
2411 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
2412 irela.r_offset = (sgotplt->output_section->vma
2413 + sgotplt->output_offset);
2414 irela.r_addend = 1; /* tell rtld to set value to resolver function */
2415 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
2417 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
2419 /* Next literal immediately follows the first. */
2420 loc += sizeof (Elf32_External_Rela);
2421 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
2422 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
2423 irela.r_offset = (sgotplt->output_section->vma
2424 + sgotplt->output_offset + 4);
2425 /* Tell rtld to set value to object's link map. */
2427 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
2429 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
2431 /* Fill in the literal table. */
2432 if (chunk < plt_chunks - 1)
2433 chunk_entries = PLT_ENTRIES_PER_CHUNK;
2435 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
2437 BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->_cooked_size);
2438 bfd_put_32 (output_bfd,
2439 sgotplt->output_section->vma + sgotplt->output_offset,
2440 spltlittbl->contents + (chunk * 8) + 0);
2441 bfd_put_32 (output_bfd,
2442 8 + (chunk_entries * 4),
2443 spltlittbl->contents + (chunk * 8) + 4);
2446 /* All the dynamic relocations have been emitted at this point.
2447 Make sure the relocation sections are the correct size. */
2448 if (srelgot->_cooked_size != (sizeof (Elf32_External_Rela)
2449 * srelgot->reloc_count)
2450 || srelplt->_cooked_size != (sizeof (Elf32_External_Rela)
2451 * srelplt->reloc_count))
2454 /* The .xt.lit.plt section has just been modified. This must
2455 happen before the code below which combines adjacent literal
2456 table entries, and the .xt.lit.plt contents have to be forced to
2458 if (! bfd_set_section_contents (output_bfd,
2459 spltlittbl->output_section,
2460 spltlittbl->contents,
2461 spltlittbl->output_offset,
2462 spltlittbl->_raw_size))
2464 /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */
2465 spltlittbl->flags &= ~SEC_HAS_CONTENTS;
2468 /* Combine adjacent literal table entries. */
2469 BFD_ASSERT (! info->relocateable);
2470 num_xtlit_entries = elf_xtensa_combine_prop_entries (output_bfd, ".xt.lit");
2471 if (num_xtlit_entries < 0)
2474 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2475 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2476 for (; dyncon < dynconend; dyncon++)
2478 Elf_Internal_Dyn dyn;
2482 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2489 case DT_XTENSA_GOT_LOC_SZ:
2490 s = bfd_get_section_by_name (output_bfd, ".xt.lit");
2492 dyn.d_un.d_val = num_xtlit_entries;
2495 case DT_XTENSA_GOT_LOC_OFF:
2504 s = bfd_get_section_by_name (output_bfd, name);
2506 dyn.d_un.d_ptr = s->vma;
2510 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2512 dyn.d_un.d_val = (s->_cooked_size ? s->_cooked_size : s->_raw_size);
2516 /* Adjust RELASZ to not include JMPREL. This matches what
2517 glibc expects and what is done for several other ELF
2518 targets (e.g., i386, alpha), but the "correct" behavior
2519 seems to be unresolved. Since the linker script arranges
2520 for .rela.plt to follow all other relocation sections, we
2521 don't have to worry about changing the DT_RELA entry. */
2522 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2526 (s->_cooked_size ? s->_cooked_size : s->_raw_size);
2531 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2538 /* Functions for dealing with the e_flags field. */
2540 /* Merge backend specific data from an object file to the output
2541 object file when linking. */
2544 elf_xtensa_merge_private_bfd_data (ibfd, obfd)
2548 unsigned out_mach, in_mach;
2549 flagword out_flag, in_flag;
2551 /* Check if we have the same endianess. */
2552 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
2555 /* Don't even pretend to support mixed-format linking. */
2556 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2557 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2560 out_flag = elf_elfheader (obfd)->e_flags;
2561 in_flag = elf_elfheader (ibfd)->e_flags;
2563 out_mach = out_flag & EF_XTENSA_MACH;
2564 in_mach = in_flag & EF_XTENSA_MACH;
2565 if (out_mach != in_mach)
2567 (*_bfd_error_handler)
2568 ("%s: incompatible machine type. Output is 0x%x. Input is 0x%x\n",
2569 bfd_archive_filename (ibfd), out_mach, in_mach);
2570 bfd_set_error (bfd_error_wrong_format);
2574 if (! elf_flags_init (obfd))
2576 elf_flags_init (obfd) = TRUE;
2577 elf_elfheader (obfd)->e_flags = in_flag;
2579 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2580 && bfd_get_arch_info (obfd)->the_default)
2581 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
2582 bfd_get_mach (ibfd));
2587 if ((out_flag & EF_XTENSA_XT_INSN) !=
2588 (in_flag & EF_XTENSA_XT_INSN))
2589 elf_elfheader(obfd)->e_flags &= (~ EF_XTENSA_XT_INSN);
2591 if ((out_flag & EF_XTENSA_XT_LIT) !=
2592 (in_flag & EF_XTENSA_XT_LIT))
2593 elf_elfheader(obfd)->e_flags &= (~ EF_XTENSA_XT_LIT);
2600 elf_xtensa_set_private_flags (abfd, flags)
2604 BFD_ASSERT (!elf_flags_init (abfd)
2605 || elf_elfheader (abfd)->e_flags == flags);
2607 elf_elfheader (abfd)->e_flags |= flags;
2608 elf_flags_init (abfd) = TRUE;
2615 elf_xtensa_get_private_bfd_flags (abfd)
2618 return elf_elfheader (abfd)->e_flags;
2623 elf_xtensa_print_private_bfd_data (abfd, farg)
2627 FILE *f = (FILE *) farg;
2628 flagword e_flags = elf_elfheader (abfd)->e_flags;
2630 fprintf (f, "\nXtensa header:\n");
2631 if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH)
2632 fprintf (f, "\nMachine = Base\n");
2634 fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH);
2636 fprintf (f, "Insn tables = %s\n",
2637 (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false");
2639 fprintf (f, "Literal tables = %s\n",
2640 (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false");
2642 return _bfd_elf_print_private_bfd_data (abfd, farg);
2646 /* Set the right machine number for an Xtensa ELF file. */
2649 elf_xtensa_object_p (abfd)
2653 unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH;
2658 mach = bfd_mach_xtensa;
2664 (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach);
2669 /* The final processing done just before writing out an Xtensa ELF object
2670 file. This gets the Xtensa architecture right based on the machine
2674 elf_xtensa_final_write_processing (abfd, linker)
2676 bfd_boolean linker ATTRIBUTE_UNUSED;
2681 switch (mach = bfd_get_mach (abfd))
2683 case bfd_mach_xtensa:
2684 val = E_XTENSA_MACH;
2690 elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH);
2691 elf_elfheader (abfd)->e_flags |= val;
2695 static enum elf_reloc_type_class
2696 elf_xtensa_reloc_type_class (rela)
2697 const Elf_Internal_Rela *rela;
2699 switch ((int) ELF32_R_TYPE (rela->r_info))
2701 case R_XTENSA_RELATIVE:
2702 return reloc_class_relative;
2703 case R_XTENSA_JMP_SLOT:
2704 return reloc_class_plt;
2706 return reloc_class_normal;
2712 elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)
2714 struct elf_reloc_cookie *cookie;
2715 struct bfd_link_info *info;
2719 bfd_vma section_size;
2720 bfd_vma offset, actual_offset;
2721 size_t removed_bytes = 0;
2723 section_size = (sec->_cooked_size ? sec->_cooked_size : sec->_raw_size);
2724 if (section_size == 0 || section_size % 8 != 0)
2727 if (sec->output_section
2728 && bfd_is_abs_section (sec->output_section))
2731 contents = retrieve_contents (abfd, sec, info->keep_memory);
2735 cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory);
2738 release_contents (sec, contents);
2742 cookie->rel = cookie->rels;
2743 cookie->relend = cookie->rels + sec->reloc_count;
2745 for (offset = 0; offset < section_size; offset += 8)
2747 actual_offset = offset - removed_bytes;
2749 /* The ...symbol_deleted_p function will skip over relocs but it
2750 won't adjust their offsets, so do that here. */
2751 while (cookie->rel < cookie->relend
2752 && cookie->rel->r_offset < offset)
2754 cookie->rel->r_offset -= removed_bytes;
2758 while (cookie->rel < cookie->relend
2759 && cookie->rel->r_offset == offset)
2761 if (_bfd_elf32_reloc_symbol_deleted_p (offset, cookie))
2763 /* Remove the table entry. (If the reloc type is NONE, then
2764 the entry has already been merged with another and deleted
2765 during relaxation.) */
2766 if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE)
2768 /* Shift the contents up. */
2769 if (offset + 8 < section_size)
2770 memmove (&contents[actual_offset],
2771 &contents[actual_offset+8],
2772 section_size - offset - 8);
2776 /* Remove this relocation. */
2777 cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
2780 /* Adjust the relocation offset for previous removals. This
2781 should not be done before calling ...symbol_deleted_p
2782 because it might mess up the offset comparisons there.
2783 Make sure the offset doesn't underflow in the case where
2784 the first entry is removed. */
2785 if (cookie->rel->r_offset >= removed_bytes)
2786 cookie->rel->r_offset -= removed_bytes;
2788 cookie->rel->r_offset = 0;
2794 if (removed_bytes != 0)
2796 /* Adjust any remaining relocs (shouldn't be any). */
2797 for (; cookie->rel < cookie->relend; cookie->rel++)
2799 if (cookie->rel->r_offset >= removed_bytes)
2800 cookie->rel->r_offset -= removed_bytes;
2802 cookie->rel->r_offset = 0;
2805 /* Clear the removed bytes. */
2806 memset (&contents[section_size - removed_bytes], 0, removed_bytes);
2808 pin_contents (sec, contents);
2809 pin_internal_relocs (sec, cookie->rels);
2811 sec->_cooked_size = section_size - removed_bytes;
2812 /* Also shrink _raw_size. See comments in relax_property_section. */
2813 sec->_raw_size = sec->_cooked_size;
2817 release_contents (sec, contents);
2818 release_internal_relocs (sec, cookie->rels);
2821 return (removed_bytes != 0);
2826 elf_xtensa_discard_info (abfd, cookie, info)
2828 struct elf_reloc_cookie *cookie;
2829 struct bfd_link_info *info;
2832 bfd_boolean changed = FALSE;
2834 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2836 if (xtensa_is_property_section (sec))
2838 if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec))
2848 elf_xtensa_ignore_discarded_relocs (sec)
2851 return xtensa_is_property_section (sec);
2855 /* Support for core dump NOTE sections. */
2858 elf_xtensa_grok_prstatus (abfd, note)
2860 Elf_Internal_Note *note;
2863 unsigned int raw_size;
2865 /* The size for Xtensa is variable, so don't try to recognize the format
2866 based on the size. Just assume this is GNU/Linux. */
2869 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2872 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2876 raw_size = note->descsz - offset - 4;
2878 /* Make a ".reg/999" section. */
2879 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2880 raw_size, note->descpos + offset);
2885 elf_xtensa_grok_psinfo (abfd, note)
2887 Elf_Internal_Note *note;
2889 switch (note->descsz)
2894 case 128: /* GNU/Linux elf_prpsinfo */
2895 elf_tdata (abfd)->core_program
2896 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2897 elf_tdata (abfd)->core_command
2898 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2901 /* Note that for some reason, a spurious space is tacked
2902 onto the end of the args in some (at least one anyway)
2903 implementations, so strip it off if it exists. */
2906 char *command = elf_tdata (abfd)->core_command;
2907 int n = strlen (command);
2909 if (0 < n && command[n - 1] == ' ')
2910 command[n - 1] = '\0';
2917 /* Generic Xtensa configurability stuff. */
2919 static xtensa_opcode callx0_op = XTENSA_UNDEFINED;
2920 static xtensa_opcode callx4_op = XTENSA_UNDEFINED;
2921 static xtensa_opcode callx8_op = XTENSA_UNDEFINED;
2922 static xtensa_opcode callx12_op = XTENSA_UNDEFINED;
2923 static xtensa_opcode call0_op = XTENSA_UNDEFINED;
2924 static xtensa_opcode call4_op = XTENSA_UNDEFINED;
2925 static xtensa_opcode call8_op = XTENSA_UNDEFINED;
2926 static xtensa_opcode call12_op = XTENSA_UNDEFINED;
2929 init_call_opcodes ()
2931 if (callx0_op == XTENSA_UNDEFINED)
2933 callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0");
2934 callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4");
2935 callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8");
2936 callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12");
2937 call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0");
2938 call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4");
2939 call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8");
2940 call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12");
2946 is_indirect_call_opcode (opcode)
2947 xtensa_opcode opcode;
2949 init_call_opcodes ();
2950 return (opcode == callx0_op
2951 || opcode == callx4_op
2952 || opcode == callx8_op
2953 || opcode == callx12_op);
2958 is_direct_call_opcode (opcode)
2959 xtensa_opcode opcode;
2961 init_call_opcodes ();
2962 return (opcode == call0_op
2963 || opcode == call4_op
2964 || opcode == call8_op
2965 || opcode == call12_op);
2970 is_windowed_call_opcode (opcode)
2971 xtensa_opcode opcode;
2973 init_call_opcodes ();
2974 return (opcode == call4_op
2975 || opcode == call8_op
2976 || opcode == call12_op
2977 || opcode == callx4_op
2978 || opcode == callx8_op
2979 || opcode == callx12_op);
2983 static xtensa_opcode
2984 get_l32r_opcode (void)
2986 static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED;
2987 if (l32r_opcode == XTENSA_UNDEFINED)
2989 l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r");
2990 BFD_ASSERT (l32r_opcode != XTENSA_UNDEFINED);
2997 l32r_offset (addr, pc)
3003 offset = addr - ((pc+3) & -4);
3004 BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0);
3005 offset = (signed int) offset >> 2;
3006 BFD_ASSERT ((signed int) offset >> 16 == -1);
3011 /* Get the operand number for a PC-relative relocation.
3012 If the relocation is not a PC-relative one, return (-1). */
3015 get_relocation_opnd (irel)
3016 Elf_Internal_Rela *irel;
3018 if (ELF32_R_TYPE (irel->r_info) < R_XTENSA_OP0
3019 || ELF32_R_TYPE (irel->r_info) >= R_XTENSA_max)
3021 return ELF32_R_TYPE (irel->r_info) - R_XTENSA_OP0;
3025 /* Get the opcode for a relocation. */
3027 static xtensa_opcode
3028 get_relocation_opcode (sec, contents, irel)
3031 Elf_Internal_Rela *irel;
3033 static xtensa_insnbuf ibuff = NULL;
3034 xtensa_isa isa = xtensa_default_isa;
3036 if (get_relocation_opnd (irel) == -1)
3037 return XTENSA_UNDEFINED;
3039 if (contents == NULL)
3040 return XTENSA_UNDEFINED;
3042 if (sec->_raw_size <= irel->r_offset)
3043 return XTENSA_UNDEFINED;
3046 ibuff = xtensa_insnbuf_alloc (isa);
3048 /* Decode the instruction. */
3049 xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset]);
3050 return xtensa_decode_insn (isa, ibuff);
3055 is_l32r_relocation (sec, contents, irel)
3058 Elf_Internal_Rela *irel;
3060 xtensa_opcode opcode;
3062 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_OP1)
3065 opcode = get_relocation_opcode (sec, contents, irel);
3066 return (opcode == get_l32r_opcode ());
3070 /* Code for transforming CALLs at link-time. */
3072 static bfd_reloc_status_type
3073 elf_xtensa_do_asm_simplify (contents, address, content_length)
3076 bfd_vma content_length;
3078 static xtensa_insnbuf insnbuf = NULL;
3079 xtensa_opcode opcode;
3080 xtensa_operand operand;
3081 xtensa_opcode direct_call_opcode;
3082 xtensa_isa isa = xtensa_default_isa;
3083 bfd_byte *chbuf = contents + address;
3086 if (insnbuf == NULL)
3087 insnbuf = xtensa_insnbuf_alloc (isa);
3089 if (content_length < address)
3091 (*_bfd_error_handler)
3092 ("Attempt to convert L32R/CALLX to CALL failed\n");
3093 return bfd_reloc_other;
3096 opcode = get_expanded_call_opcode (chbuf, content_length - address);
3097 direct_call_opcode = swap_callx_for_call_opcode (opcode);
3098 if (direct_call_opcode == XTENSA_UNDEFINED)
3100 (*_bfd_error_handler)
3101 ("Attempt to convert L32R/CALLX to CALL failed\n");
3102 return bfd_reloc_other;
3105 /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */
3106 opcode = xtensa_opcode_lookup (isa, "or");
3107 xtensa_encode_insn (isa, opcode, insnbuf);
3108 for (opn = 0; opn < 3; opn++)
3110 operand = xtensa_get_operand (isa, opcode, opn);
3111 xtensa_operand_set_field (operand, insnbuf, 1);
3113 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf);
3115 /* Assemble a CALL ("callN 0") into the 3 byte offset. */
3116 xtensa_encode_insn (isa, direct_call_opcode, insnbuf);
3117 operand = xtensa_get_operand (isa, opcode, 0);
3118 xtensa_operand_set_field (operand, insnbuf, 0);
3119 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3);
3121 return bfd_reloc_ok;
3125 static bfd_reloc_status_type
3126 contract_asm_expansion (contents, content_length, irel)
3128 bfd_vma content_length;
3129 Elf_Internal_Rela *irel;
3131 bfd_reloc_status_type retval =
3132 elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length);
3134 if (retval != bfd_reloc_ok)
3137 /* Update the irel->r_offset field so that the right immediate and
3138 the right instruction are modified during the relocation. */
3139 irel->r_offset += 3;
3140 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_OP0);
3141 return bfd_reloc_ok;
3145 static xtensa_opcode
3146 swap_callx_for_call_opcode (opcode)
3147 xtensa_opcode opcode;
3149 init_call_opcodes ();
3151 if (opcode == callx0_op) return call0_op;
3152 if (opcode == callx4_op) return call4_op;
3153 if (opcode == callx8_op) return call8_op;
3154 if (opcode == callx12_op) return call12_op;
3156 /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */
3157 return XTENSA_UNDEFINED;
3161 /* Check if "buf" is pointing to a "L32R aN; CALLX aN" sequence, and
3162 if so, return the CALLX opcode. If not, return XTENSA_UNDEFINED. */
3164 #define L32R_TARGET_REG_OPERAND 0
3165 #define CALLN_SOURCE_OPERAND 0
3167 static xtensa_opcode
3168 get_expanded_call_opcode (buf, bufsize)
3172 static xtensa_insnbuf insnbuf = NULL;
3173 xtensa_opcode opcode;
3174 xtensa_operand operand;
3175 xtensa_isa isa = xtensa_default_isa;
3176 uint32 regno, call_regno;
3178 /* Buffer must be at least 6 bytes. */
3180 return XTENSA_UNDEFINED;
3182 if (insnbuf == NULL)
3183 insnbuf = xtensa_insnbuf_alloc (isa);
3185 xtensa_insnbuf_from_chars (isa, insnbuf, buf);
3186 opcode = xtensa_decode_insn (isa, insnbuf);
3188 if (opcode != get_l32r_opcode ())
3189 return XTENSA_UNDEFINED;
3191 operand = xtensa_get_operand (isa, opcode, L32R_TARGET_REG_OPERAND);
3192 regno = xtensa_operand_decode
3193 (operand, xtensa_operand_get_field (operand, insnbuf));
3195 /* Next instruction should be an CALLXn with operand 0 == regno. */
3196 xtensa_insnbuf_from_chars (isa, insnbuf,
3197 buf + xtensa_insn_length (isa, opcode));
3198 opcode = xtensa_decode_insn (isa, insnbuf);
3200 if (!is_indirect_call_opcode (opcode))
3201 return XTENSA_UNDEFINED;
3203 operand = xtensa_get_operand (isa, opcode, CALLN_SOURCE_OPERAND);
3204 call_regno = xtensa_operand_decode
3205 (operand, xtensa_operand_get_field (operand, insnbuf));
3206 if (call_regno != regno)
3207 return XTENSA_UNDEFINED;
3213 /* Data structures used during relaxation. */
3215 /* r_reloc: relocation values. */
3217 /* Through the relaxation process, we need to keep track of the values
3218 that will result from evaluating relocations. The standard ELF
3219 relocation structure is not sufficient for this purpose because we're
3220 operating on multiple input files at once, so we need to know which
3221 input file a relocation refers to. The r_reloc structure thus
3222 records both the input file (bfd) and ELF relocation.
3224 For efficiency, an r_reloc also contains a "target_offset" field to
3225 cache the target-section-relative offset value that is represented by
3228 typedef struct r_reloc_struct r_reloc;
3230 struct r_reloc_struct
3233 Elf_Internal_Rela rela;
3234 bfd_vma target_offset;
3237 static bfd_boolean r_reloc_is_const
3238 PARAMS ((const r_reloc *));
3239 static void r_reloc_init
3240 PARAMS ((r_reloc *, bfd *, Elf_Internal_Rela *));
3241 static bfd_vma r_reloc_get_target_offset
3242 PARAMS ((const r_reloc *));
3243 static asection *r_reloc_get_section
3244 PARAMS ((const r_reloc *));
3245 static bfd_boolean r_reloc_is_defined
3246 PARAMS ((const r_reloc *));
3247 static struct elf_link_hash_entry *r_reloc_get_hash_entry
3248 PARAMS ((const r_reloc *));
3251 /* The r_reloc structure is included by value in literal_value, but not
3252 every literal_value has an associated relocation -- some are simple
3253 constants. In such cases, we set all the fields in the r_reloc
3254 struct to zero. The r_reloc_is_const function should be used to
3255 detect this case. */
3258 r_reloc_is_const (r_rel)
3259 const r_reloc *r_rel;
3261 return (r_rel->abfd == NULL);
3266 r_reloc_init (r_rel, abfd, irel)
3269 Elf_Internal_Rela *irel;
3273 r_rel->rela = *irel;
3275 r_rel->target_offset = r_reloc_get_target_offset (r_rel);
3278 memset (r_rel, 0, sizeof (r_reloc));
3283 r_reloc_get_target_offset (r_rel)
3284 const r_reloc *r_rel;
3286 bfd_vma target_offset;
3287 unsigned long r_symndx;
3289 BFD_ASSERT (!r_reloc_is_const (r_rel));
3290 r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
3291 target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx);
3292 return (target_offset + r_rel->rela.r_addend);
3296 static struct elf_link_hash_entry *
3297 r_reloc_get_hash_entry (r_rel)
3298 const r_reloc *r_rel;
3300 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
3301 return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx);
3306 r_reloc_get_section (r_rel)
3307 const r_reloc *r_rel;
3309 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
3310 return get_elf_r_symndx_section (r_rel->abfd, r_symndx);
3315 r_reloc_is_defined (r_rel)
3316 const r_reloc *r_rel;
3318 asection *sec = r_reloc_get_section (r_rel);
3319 if (sec == bfd_abs_section_ptr
3320 || sec == bfd_com_section_ptr
3321 || sec == bfd_und_section_ptr)
3327 /* source_reloc: relocations that reference literal sections. */
3329 /* To determine whether literals can be coalesced, we need to first
3330 record all the relocations that reference the literals. The
3331 source_reloc structure below is used for this purpose. The
3332 source_reloc entries are kept in a per-literal-section array, sorted
3333 by offset within the literal section (i.e., target offset).
3335 The source_sec and r_rel.rela.r_offset fields identify the source of
3336 the relocation. The r_rel field records the relocation value, i.e.,
3337 the offset of the literal being referenced. The opnd field is needed
3338 to determine the range of the immediate field to which the relocation
3339 applies, so we can determine whether another literal with the same
3340 value is within range. The is_null field is true when the relocation
3341 is being removed (e.g., when an L32R is being removed due to a CALLX
3342 that is converted to a direct CALL). */
3344 typedef struct source_reloc_struct source_reloc;
3346 struct source_reloc_struct
3348 asection *source_sec;
3350 xtensa_operand opnd;
3351 bfd_boolean is_null;
3355 static void init_source_reloc
3356 PARAMS ((source_reloc *, asection *, const r_reloc *, xtensa_operand));
3357 static source_reloc *find_source_reloc
3358 PARAMS ((source_reloc *, int, asection *, Elf_Internal_Rela *));
3359 static int source_reloc_compare
3360 PARAMS ((const PTR, const PTR));
3364 init_source_reloc (reloc, source_sec, r_rel, opnd)
3365 source_reloc *reloc;
3366 asection *source_sec;
3367 const r_reloc *r_rel;
3368 xtensa_operand opnd;
3370 reloc->source_sec = source_sec;
3371 reloc->r_rel = *r_rel;
3373 reloc->is_null = FALSE;
3377 /* Find the source_reloc for a particular source offset and relocation
3378 type. Note that the array is sorted by _target_ offset, so this is
3379 just a linear search. */
3381 static source_reloc *
3382 find_source_reloc (src_relocs, src_count, sec, irel)
3383 source_reloc *src_relocs;
3386 Elf_Internal_Rela *irel;
3390 for (i = 0; i < src_count; i++)
3392 if (src_relocs[i].source_sec == sec
3393 && src_relocs[i].r_rel.rela.r_offset == irel->r_offset
3394 && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info)
3395 == ELF32_R_TYPE (irel->r_info)))
3396 return &src_relocs[i];
3404 source_reloc_compare (ap, bp)
3408 const source_reloc *a = (const source_reloc *) ap;
3409 const source_reloc *b = (const source_reloc *) bp;
3411 return (a->r_rel.target_offset - b->r_rel.target_offset);
3415 /* Literal values and value hash tables. */
3417 /* Literals with the same value can be coalesced. The literal_value
3418 structure records the value of a literal: the "r_rel" field holds the
3419 information from the relocation on the literal (if there is one) and
3420 the "value" field holds the contents of the literal word itself.
3422 The value_map structure records a literal value along with the
3423 location of a literal holding that value. The value_map hash table
3424 is indexed by the literal value, so that we can quickly check if a
3425 particular literal value has been seen before and is thus a candidate
3428 typedef struct literal_value_struct literal_value;
3429 typedef struct value_map_struct value_map;
3430 typedef struct value_map_hash_table_struct value_map_hash_table;
3432 struct literal_value_struct
3435 unsigned long value;
3438 struct value_map_struct
3440 literal_value val; /* The literal value. */
3441 r_reloc loc; /* Location of the literal. */
3445 struct value_map_hash_table_struct
3447 unsigned bucket_count;
3448 value_map **buckets;
3453 static bfd_boolean is_same_value
3454 PARAMS ((const literal_value *, const literal_value *));
3455 static value_map_hash_table *value_map_hash_table_init
3457 static unsigned hash_literal_value
3458 PARAMS ((const literal_value *));
3459 static unsigned hash_bfd_vma
3461 static value_map *get_cached_value
3462 PARAMS ((value_map_hash_table *, const literal_value *));
3463 static value_map *add_value_map
3464 PARAMS ((value_map_hash_table *, const literal_value *, const r_reloc *));
3468 is_same_value (src1, src2)
3469 const literal_value *src1;
3470 const literal_value *src2;
3472 if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel))
3475 if (r_reloc_is_const (&src1->r_rel))
3476 return (src1->value == src2->value);
3478 if (ELF32_R_TYPE (src1->r_rel.rela.r_info)
3479 != ELF32_R_TYPE (src2->r_rel.rela.r_info))
3482 if (r_reloc_get_target_offset (&src1->r_rel)
3483 != r_reloc_get_target_offset (&src2->r_rel))
3486 if (src1->value != src2->value)
3489 /* Now check for the same section and the same elf_hash. */
3490 if (r_reloc_is_defined (&src1->r_rel))
3492 if (r_reloc_get_section (&src1->r_rel)
3493 != r_reloc_get_section (&src2->r_rel))
3498 if (r_reloc_get_hash_entry (&src1->r_rel)
3499 != r_reloc_get_hash_entry (&src2->r_rel))
3502 if (r_reloc_get_hash_entry (&src1->r_rel) == 0)
3510 /* Must be power of 2. */
3511 #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024
3513 static value_map_hash_table *
3514 value_map_hash_table_init ()
3516 value_map_hash_table *values;
3518 values = (value_map_hash_table *)
3519 bfd_malloc (sizeof (value_map_hash_table));
3521 values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT;
3523 values->buckets = (value_map **)
3524 bfd_zmalloc (sizeof (value_map *) * values->bucket_count);
3534 return (val >> 2) + (val >> 10);
3539 hash_literal_value (src)
3540 const literal_value *src;
3543 if (r_reloc_is_const (&src->r_rel))
3544 return hash_bfd_vma (src->value);
3546 hash_val = (hash_bfd_vma (r_reloc_get_target_offset (&src->r_rel))
3547 + hash_bfd_vma (src->value));
3549 /* Now check for the same section and the same elf_hash. */
3550 if (r_reloc_is_defined (&src->r_rel))
3551 hash_val += hash_bfd_vma ((bfd_vma) r_reloc_get_section (&src->r_rel));
3553 hash_val += hash_bfd_vma ((bfd_vma) r_reloc_get_hash_entry (&src->r_rel));
3559 /* Check if the specified literal_value has been seen before. */
3562 get_cached_value (map, val)
3563 value_map_hash_table *map;
3564 const literal_value *val;
3570 idx = hash_literal_value (val);
3571 idx = idx & (map->bucket_count - 1);
3572 bucket = map->buckets[idx];
3573 for (map_e = bucket; map_e; map_e = map_e->next)
3575 if (is_same_value (&map_e->val, val))
3582 /* Record a new literal value. It is illegal to call this if VALUE
3583 already has an entry here. */
3586 add_value_map (map, val, loc)
3587 value_map_hash_table *map;
3588 const literal_value *val;
3591 value_map **bucket_p;
3594 value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map));
3596 BFD_ASSERT (get_cached_value (map, val) == NULL);
3600 idx = hash_literal_value (val);
3601 idx = idx & (map->bucket_count - 1);
3602 bucket_p = &map->buckets[idx];
3604 val_e->next = *bucket_p;
3607 /* FIXME: consider resizing the hash table if we get too many entries */
3613 /* Lists of literals being coalesced or removed. */
3615 /* In the usual case, the literal identified by "from" is being
3616 coalesced with another literal identified by "to". If the literal is
3617 unused and is being removed altogether, "to.abfd" will be NULL.
3618 The removed_literal entries are kept on a per-section list, sorted
3619 by the "from" offset field. */
3621 typedef struct removed_literal_struct removed_literal;
3622 typedef struct removed_literal_list_struct removed_literal_list;
3624 struct removed_literal_struct
3628 removed_literal *next;
3631 struct removed_literal_list_struct
3633 removed_literal *head;
3634 removed_literal *tail;
3638 static void add_removed_literal
3639 PARAMS ((removed_literal_list *, const r_reloc *, const r_reloc *));
3640 static removed_literal *find_removed_literal
3641 PARAMS ((removed_literal_list *, bfd_vma));
3642 static bfd_vma offset_with_removed_literals
3643 PARAMS ((removed_literal_list *, bfd_vma));
3646 /* Record that the literal at "from" is being removed. If "to" is not
3647 NULL, the "from" literal is being coalesced with the "to" literal. */
3650 add_removed_literal (removed_list, from, to)
3651 removed_literal_list *removed_list;
3652 const r_reloc *from;
3655 removed_literal *r, *new_r, *next_r;
3657 new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal));
3659 new_r->from = *from;
3663 new_r->to.abfd = NULL;
3666 r = removed_list->head;
3669 removed_list->head = new_r;
3670 removed_list->tail = new_r;
3672 /* Special check for common case of append. */
3673 else if (removed_list->tail->from.target_offset < from->target_offset)
3675 removed_list->tail->next = new_r;
3676 removed_list->tail = new_r;
3680 while (r->from.target_offset < from->target_offset
3687 new_r->next = next_r;
3689 removed_list->tail = new_r;
3694 /* Check if the list of removed literals contains an entry for the
3695 given address. Return the entry if found. */
3697 static removed_literal *
3698 find_removed_literal (removed_list, addr)
3699 removed_literal_list *removed_list;
3702 removed_literal *r = removed_list->head;
3703 while (r && r->from.target_offset < addr)
3705 if (r && r->from.target_offset == addr)
3711 /* Adjust an offset in a section to compensate for literals that are
3712 being removed. Search the list of removed literals and subtract
3713 4 bytes for every removed literal prior to the given address. */
3716 offset_with_removed_literals (removed_list, addr)
3717 removed_literal_list *removed_list;
3720 removed_literal *r = removed_list->head;
3721 unsigned num_bytes = 0;
3726 while (r && r->from.target_offset <= addr)
3731 if (num_bytes > addr)
3733 return (addr - num_bytes);
3737 /* Coalescing literals may require a relocation to refer to a section in
3738 a different input file, but the standard relocation information
3739 cannot express that. Instead, the reloc_bfd_fix structures are used
3740 to "fix" the relocations that refer to sections in other input files.
3741 These structures are kept on per-section lists. The "src_type" field
3742 records the relocation type in case there are multiple relocations on
3743 the same location. FIXME: This is ugly; an alternative might be to
3744 add new symbols with the "owner" field to some other input file. */
3746 typedef struct reloc_bfd_fix_struct reloc_bfd_fix;
3748 struct reloc_bfd_fix_struct
3752 unsigned src_type; /* Relocation type. */
3755 asection *target_sec;
3756 bfd_vma target_offset;
3758 reloc_bfd_fix *next;
3762 static reloc_bfd_fix *reloc_bfd_fix_init
3763 PARAMS ((asection *, bfd_vma, unsigned, bfd *, asection *, bfd_vma));
3764 static reloc_bfd_fix *get_bfd_fix
3765 PARAMS ((reloc_bfd_fix *, asection *, bfd_vma, unsigned));
3768 static reloc_bfd_fix *
3769 reloc_bfd_fix_init (src_sec, src_offset, src_type,
3770 target_abfd, target_sec, target_offset)
3775 asection *target_sec;
3776 bfd_vma target_offset;
3780 fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix));
3781 fix->src_sec = src_sec;
3782 fix->src_offset = src_offset;
3783 fix->src_type = src_type;
3784 fix->target_abfd = target_abfd;
3785 fix->target_sec = target_sec;
3786 fix->target_offset = target_offset;
3792 static reloc_bfd_fix *
3793 get_bfd_fix (fix_list, sec, offset, type)
3794 reloc_bfd_fix *fix_list;
3801 for (r = fix_list; r != NULL; r = r->next)
3803 if (r->src_sec == sec
3804 && r->src_offset == offset
3805 && r->src_type == type)
3812 /* Per-section data for relaxation. */
3814 struct xtensa_relax_info_struct
3816 bfd_boolean is_relaxable_literal_section;
3817 int visited; /* Number of times visited. */
3819 source_reloc *src_relocs; /* Array[src_count]. */
3821 int src_next; /* Next src_relocs entry to assign. */
3823 removed_literal_list removed_list;
3825 reloc_bfd_fix *fix_list;
3828 struct elf_xtensa_section_data
3830 struct bfd_elf_section_data elf;
3831 xtensa_relax_info relax_info;
3834 static void init_xtensa_relax_info
3835 PARAMS ((asection *));
3836 static xtensa_relax_info *get_xtensa_relax_info
3837 PARAMS ((asection *));
3839 PARAMS ((asection *, reloc_bfd_fix *));
3843 elf_xtensa_new_section_hook (abfd, sec)
3847 struct elf_xtensa_section_data *sdata;
3848 bfd_size_type amt = sizeof (*sdata);
3850 sdata = (struct elf_xtensa_section_data *) bfd_zalloc (abfd, amt);
3853 sec->used_by_bfd = (PTR) sdata;
3855 return _bfd_elf_new_section_hook (abfd, sec);
3860 init_xtensa_relax_info (sec)
3863 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
3865 relax_info->is_relaxable_literal_section = FALSE;
3866 relax_info->visited = 0;
3868 relax_info->src_relocs = NULL;
3869 relax_info->src_count = 0;
3870 relax_info->src_next = 0;
3872 relax_info->removed_list.head = NULL;
3873 relax_info->removed_list.tail = NULL;
3875 relax_info->fix_list = NULL;
3879 static xtensa_relax_info *
3880 get_xtensa_relax_info (sec)
3883 struct elf_xtensa_section_data *section_data;
3885 /* No info available if no section or if it is an output section. */
3886 if (!sec || sec == sec->output_section)
3889 section_data = (struct elf_xtensa_section_data *) elf_section_data (sec);
3890 return §ion_data->relax_info;
3895 add_fix (src_sec, fix)
3899 xtensa_relax_info *relax_info;
3901 relax_info = get_xtensa_relax_info (src_sec);
3902 fix->next = relax_info->fix_list;
3903 relax_info->fix_list = fix;
3907 /* Access to internal relocations, section contents and symbols. */
3909 /* During relaxation, we need to modify relocations, section contents,
3910 and symbol definitions, and we need to keep the original values from
3911 being reloaded from the input files, i.e., we need to "pin" the
3912 modified values in memory. We also want to continue to observe the
3913 setting of the "keep-memory" flag. The following functions wrap the
3914 standard BFD functions to take care of this for us. */
3916 static Elf_Internal_Rela *
3917 retrieve_internal_relocs (abfd, sec, keep_memory)
3920 bfd_boolean keep_memory;
3922 Elf_Internal_Rela *internal_relocs;
3924 if ((sec->flags & SEC_LINKER_CREATED) != 0)
3927 internal_relocs = elf_section_data (sec)->relocs;
3928 if (internal_relocs == NULL)
3929 internal_relocs = (_bfd_elf32_link_read_relocs
3930 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
3932 return internal_relocs;
3937 pin_internal_relocs (sec, internal_relocs)
3939 Elf_Internal_Rela *internal_relocs;
3941 elf_section_data (sec)->relocs = internal_relocs;
3946 release_internal_relocs (sec, internal_relocs)
3948 Elf_Internal_Rela *internal_relocs;
3951 && elf_section_data (sec)->relocs != internal_relocs)
3952 free (internal_relocs);
3957 retrieve_contents (abfd, sec, keep_memory)
3960 bfd_boolean keep_memory;
3964 contents = elf_section_data (sec)->this_hdr.contents;
3966 if (contents == NULL && sec->_raw_size != 0)
3968 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
3969 if (contents != NULL)
3971 if (! bfd_get_section_contents (abfd, sec, contents,
3972 (file_ptr) 0, sec->_raw_size))
3978 elf_section_data (sec)->this_hdr.contents = contents;
3986 pin_contents (sec, contents)
3990 elf_section_data (sec)->this_hdr.contents = contents;
3995 release_contents (sec, contents)
4000 elf_section_data (sec)->this_hdr.contents != contents)
4005 static Elf_Internal_Sym *
4006 retrieve_local_syms (input_bfd)
4009 Elf_Internal_Shdr *symtab_hdr;
4010 Elf_Internal_Sym *isymbuf;
4013 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4014 locsymcount = symtab_hdr->sh_info;
4016 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4017 if (isymbuf == NULL && locsymcount != 0)
4018 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0,
4021 /* Save the symbols for this input file so they won't be read again. */
4022 if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents)
4023 symtab_hdr->contents = (unsigned char *) isymbuf;
4029 /* Code for link-time relaxation. */
4031 /* Local helper functions. */
4032 static bfd_boolean analyze_relocations
4033 PARAMS ((struct bfd_link_info *));
4034 static bfd_boolean find_relaxable_sections
4035 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
4036 static bfd_boolean collect_source_relocs
4037 PARAMS ((bfd *, asection *, struct bfd_link_info *));
4038 static bfd_boolean is_resolvable_asm_expansion
4039 PARAMS ((bfd *, asection *, bfd_byte *, Elf_Internal_Rela *,
4040 struct bfd_link_info *, bfd_boolean *));
4041 static bfd_boolean remove_literals
4042 PARAMS ((bfd *, asection *, struct bfd_link_info *, value_map_hash_table *));
4043 static bfd_boolean relax_section
4044 PARAMS ((bfd *, asection *, struct bfd_link_info *));
4045 static bfd_boolean relax_property_section
4046 PARAMS ((bfd *, asection *, struct bfd_link_info *));
4047 static bfd_boolean relax_section_symbols
4048 PARAMS ((bfd *, asection *));
4049 static bfd_boolean relocations_reach
4050 PARAMS ((source_reloc *, int, const r_reloc *));
4051 static void translate_reloc
4052 PARAMS ((const r_reloc *, r_reloc *));
4053 static Elf_Internal_Rela *get_irel_at_offset
4054 PARAMS ((asection *, Elf_Internal_Rela *, bfd_vma));
4055 static Elf_Internal_Rela *find_associated_l32r_irel
4056 PARAMS ((asection *, bfd_byte *, Elf_Internal_Rela *,
4057 Elf_Internal_Rela *));
4058 static void shrink_dynamic_reloc_sections
4059 PARAMS ((struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *));
4063 elf_xtensa_relax_section (abfd, sec, link_info, again)
4066 struct bfd_link_info *link_info;
4069 static value_map_hash_table *values = NULL;
4070 xtensa_relax_info *relax_info;
4074 /* Do some overall initialization for relaxation. */
4075 values = value_map_hash_table_init ();
4076 relaxing_section = TRUE;
4077 if (!analyze_relocations (link_info))
4082 /* Don't mess with linker-created sections. */
4083 if ((sec->flags & SEC_LINKER_CREATED) != 0)
4086 relax_info = get_xtensa_relax_info (sec);
4087 BFD_ASSERT (relax_info != NULL);
4089 switch (relax_info->visited)
4092 /* Note: It would be nice to fold this pass into
4093 analyze_relocations, but it is important for this step that the
4094 sections be examined in link order. */
4095 if (!remove_literals (abfd, sec, link_info, values))
4101 if (!relax_section (abfd, sec, link_info))
4107 if (!relax_section_symbols (abfd, sec))
4112 relax_info->visited++;
4116 /* Initialization for relaxation. */
4118 /* This function is called once at the start of relaxation. It scans
4119 all the input sections and marks the ones that are relaxable (i.e.,
4120 literal sections with L32R relocations against them). It then
4121 collect source_reloc information for all the relocations against
4122 those relaxable sections. */
4125 analyze_relocations (link_info)
4126 struct bfd_link_info *link_info;
4130 bfd_boolean is_relaxable = FALSE;
4132 /* Initialize the per-section relaxation info. */
4133 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next)
4134 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4136 init_xtensa_relax_info (sec);
4139 /* Mark relaxable sections (and count relocations against each one). */
4140 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next)
4141 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4143 if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable))
4147 /* Bail out if there are no relaxable sections. */
4151 /* Allocate space for source_relocs. */
4152 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next)
4153 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4155 xtensa_relax_info *relax_info;
4157 relax_info = get_xtensa_relax_info (sec);
4158 if (relax_info->is_relaxable_literal_section)
4160 relax_info->src_relocs = (source_reloc *)
4161 bfd_malloc (relax_info->src_count * sizeof (source_reloc));
4165 /* Collect info on relocations against each relaxable section. */
4166 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next)
4167 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4169 if (!collect_source_relocs (abfd, sec, link_info))
4177 /* Find all the literal sections that might be relaxed. The motivation
4178 for this pass is that collect_source_relocs() needs to record _all_
4179 the relocations that target each relaxable section. That is
4180 expensive and unnecessary unless the target section is actually going
4181 to be relaxed. This pass identifies all such sections by checking if
4182 they have L32Rs pointing to them. In the process, the total number
4183 of relocations targetting each section is also counted so that we
4184 know how much space to allocate for source_relocs against each
4185 relaxable literal section. */
4188 find_relaxable_sections (abfd, sec, link_info, is_relaxable_p)
4191 struct bfd_link_info *link_info;
4192 bfd_boolean *is_relaxable_p;
4194 Elf_Internal_Rela *internal_relocs;
4196 bfd_boolean ok = TRUE;
4199 internal_relocs = retrieve_internal_relocs (abfd, sec,
4200 link_info->keep_memory);
4201 if (internal_relocs == NULL)
4204 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
4205 if (contents == NULL && sec->_raw_size != 0)
4211 for (i = 0; i < sec->reloc_count; i++)
4213 Elf_Internal_Rela *irel = &internal_relocs[i];
4215 asection *target_sec;
4216 xtensa_relax_info *target_relax_info;
4218 r_reloc_init (&r_rel, abfd, irel);
4220 target_sec = r_reloc_get_section (&r_rel);
4221 target_relax_info = get_xtensa_relax_info (target_sec);
4222 if (!target_relax_info)
4225 /* Count relocations against the target section. */
4226 target_relax_info->src_count++;
4228 if (is_literal_section (target_sec)
4229 && is_l32r_relocation (sec, contents, irel)
4230 && r_reloc_is_defined (&r_rel))
4232 /* Mark the target section as relaxable. */
4233 target_relax_info->is_relaxable_literal_section = TRUE;
4234 *is_relaxable_p = TRUE;
4239 release_contents (sec, contents);
4240 release_internal_relocs (sec, internal_relocs);
4245 /* Record _all_ the relocations that point to relaxable literal
4246 sections, and get rid of ASM_EXPAND relocs by either converting them
4247 to ASM_SIMPLIFY or by removing them. */
4250 collect_source_relocs (abfd, sec, link_info)
4253 struct bfd_link_info *link_info;
4255 Elf_Internal_Rela *internal_relocs;
4257 bfd_boolean ok = TRUE;
4260 internal_relocs = retrieve_internal_relocs (abfd, sec,
4261 link_info->keep_memory);
4262 if (internal_relocs == NULL)
4265 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
4266 if (contents == NULL && sec->_raw_size != 0)
4272 /* Record relocations against relaxable literal sections. */
4273 for (i = 0; i < sec->reloc_count; i++)
4275 Elf_Internal_Rela *irel = &internal_relocs[i];
4277 asection *target_sec;
4278 xtensa_relax_info *target_relax_info;
4280 r_reloc_init (&r_rel, abfd, irel);
4282 target_sec = r_reloc_get_section (&r_rel);
4283 target_relax_info = get_xtensa_relax_info (target_sec);
4285 if (target_relax_info
4286 && target_relax_info->is_relaxable_literal_section)
4288 xtensa_opcode opcode;
4289 xtensa_operand opnd;
4290 source_reloc *s_reloc;
4293 src_next = target_relax_info->src_next++;
4294 s_reloc = &target_relax_info->src_relocs[src_next];
4296 opcode = get_relocation_opcode (sec, contents, irel);
4297 if (opcode == XTENSA_UNDEFINED)
4300 opnd = xtensa_get_operand (xtensa_default_isa, opcode,
4301 get_relocation_opnd (irel));
4303 init_source_reloc (s_reloc, sec, &r_rel, opnd);
4307 /* Now get rid of ASM_EXPAND relocations. At this point, the
4308 src_relocs array for the target literal section may still be
4309 incomplete, but it must at least contain the entries for the L32R
4310 relocations associated with ASM_EXPANDs because they were just
4311 added in the preceding loop over the relocations. */
4313 for (i = 0; i < sec->reloc_count; i++)
4315 Elf_Internal_Rela *irel = &internal_relocs[i];
4316 bfd_boolean is_reachable;
4318 if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info,
4324 Elf_Internal_Rela *l32r_irel;
4326 asection *target_sec;
4327 xtensa_relax_info *target_relax_info;
4329 /* Mark the source_reloc for the L32R so that it will be
4330 removed in remove_literals(), along with the associated
4332 l32r_irel = find_associated_l32r_irel (sec, contents,
4333 irel, internal_relocs);
4334 if (l32r_irel == NULL)
4337 r_reloc_init (&r_rel, abfd, l32r_irel);
4339 target_sec = r_reloc_get_section (&r_rel);
4340 target_relax_info = get_xtensa_relax_info (target_sec);
4342 if (target_relax_info
4343 && target_relax_info->is_relaxable_literal_section)
4345 source_reloc *s_reloc;
4347 /* Search the source_relocs for the entry corresponding to
4348 the l32r_irel. Note: The src_relocs array is not yet
4349 sorted, but it wouldn't matter anyway because we're
4350 searching by source offset instead of target offset. */
4351 s_reloc = find_source_reloc (target_relax_info->src_relocs,
4352 target_relax_info->src_next,
4354 BFD_ASSERT (s_reloc);
4355 s_reloc->is_null = TRUE;
4358 /* Convert this reloc to ASM_SIMPLIFY. */
4359 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4360 R_XTENSA_ASM_SIMPLIFY);
4361 l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
4363 pin_internal_relocs (sec, internal_relocs);
4367 /* It is resolvable but doesn't reach. We resolve now
4368 by eliminating the relocation -- the call will remain
4369 expanded into L32R/CALLX. */
4370 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
4371 pin_internal_relocs (sec, internal_relocs);
4376 release_contents (sec, contents);
4377 release_internal_relocs (sec, internal_relocs);
4382 /* Return TRUE if the asm expansion can be resolved. Generally it can
4383 be resolved on a final link or when a partial link locates it in the
4384 same section as the target. Set "is_reachable" flag if the target of
4385 the call is within the range of a direct call, given the current VMA
4386 for this section and the target section. */
4389 is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info,
4394 Elf_Internal_Rela *irel;
4395 struct bfd_link_info *link_info;
4396 bfd_boolean *is_reachable_p;
4398 asection *target_sec;
4399 bfd_vma target_offset;
4401 xtensa_opcode opcode, direct_call_opcode;
4402 bfd_vma self_address;
4403 bfd_vma dest_address;
4405 *is_reachable_p = FALSE;
4407 if (contents == NULL)
4410 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND)
4413 opcode = get_expanded_call_opcode (contents + irel->r_offset,
4414 sec->_raw_size - irel->r_offset);
4416 direct_call_opcode = swap_callx_for_call_opcode (opcode);
4417 if (direct_call_opcode == XTENSA_UNDEFINED)
4420 /* Check and see that the target resolves. */
4421 r_reloc_init (&r_rel, abfd, irel);
4422 if (!r_reloc_is_defined (&r_rel))
4425 target_sec = r_reloc_get_section (&r_rel);
4426 target_offset = r_reloc_get_target_offset (&r_rel);
4428 /* If the target is in a shared library, then it doesn't reach. This
4429 isn't supposed to come up because the compiler should never generate
4430 non-PIC calls on systems that use shared libraries, but the linker
4431 shouldn't crash regardless. */
4432 if (!target_sec->output_section)
4435 /* For relocateable sections, we can only simplify when the output
4436 section of the target is the same as the output section of the
4438 if (link_info->relocateable
4439 && (target_sec->output_section != sec->output_section))
4442 self_address = (sec->output_section->vma
4443 + sec->output_offset + irel->r_offset + 3);
4444 dest_address = (target_sec->output_section->vma
4445 + target_sec->output_offset + target_offset);
4447 *is_reachable_p = pcrel_reloc_fits
4448 (xtensa_get_operand (xtensa_default_isa, direct_call_opcode, 0),
4449 self_address, dest_address);
4451 if ((self_address >> CALL_SEGMENT_BITS) !=
4452 (dest_address >> CALL_SEGMENT_BITS))
4459 static Elf_Internal_Rela *
4460 find_associated_l32r_irel (sec, contents, other_irel, internal_relocs)
4463 Elf_Internal_Rela *other_irel;
4464 Elf_Internal_Rela *internal_relocs;
4468 for (i = 0; i < sec->reloc_count; i++)
4470 Elf_Internal_Rela *irel = &internal_relocs[i];
4472 if (irel == other_irel)
4474 if (irel->r_offset != other_irel->r_offset)
4476 if (is_l32r_relocation (sec, contents, irel))
4483 /* First relaxation pass. */
4485 /* If the section is relaxable (i.e., a literal section), check each
4486 literal to see if it has the same value as another literal that has
4487 already been seen, either in the current section or a previous one.
4488 If so, add an entry to the per-section list of removed literals. The
4489 actual changes are deferred until the next pass. */
4492 remove_literals (abfd, sec, link_info, values)
4495 struct bfd_link_info *link_info;
4496 value_map_hash_table *values;
4498 xtensa_relax_info *relax_info;
4500 Elf_Internal_Rela *internal_relocs;
4501 source_reloc *src_relocs;
4502 bfd_boolean ok = TRUE;
4505 /* Do nothing if it is not a relaxable literal section. */
4506 relax_info = get_xtensa_relax_info (sec);
4507 BFD_ASSERT (relax_info);
4509 if (!relax_info->is_relaxable_literal_section)
4512 internal_relocs = retrieve_internal_relocs (abfd, sec,
4513 link_info->keep_memory);
4515 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
4516 if (contents == NULL && sec->_raw_size != 0)
4522 /* Sort the source_relocs by target offset. */
4523 src_relocs = relax_info->src_relocs;
4524 qsort (src_relocs, relax_info->src_count,
4525 sizeof (source_reloc), source_reloc_compare);
4527 for (i = 0; i < relax_info->src_count; i++)
4530 Elf_Internal_Rela *irel = NULL;
4534 rel = &src_relocs[i];
4535 irel = get_irel_at_offset (sec, internal_relocs,
4536 rel->r_rel.target_offset);
4538 /* If the target_offset for this relocation is the same as the
4539 previous relocation, then we've already considered whether the
4540 literal can be coalesced. Skip to the next one.... */
4541 if (i != 0 && (src_relocs[i-1].r_rel.target_offset
4542 == rel->r_rel.target_offset))
4545 /* Check if the relocation was from an L32R that is being removed
4546 because a CALLX was converted to a direct CALL, and check if
4547 there are no other relocations to the literal. */
4549 && (i == relax_info->src_count - 1
4550 || (src_relocs[i+1].r_rel.target_offset
4551 != rel->r_rel.target_offset)))
4553 /* Mark the unused literal so that it will be removed. */
4554 add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL);
4556 /* Zero out the relocation on this literal location. */
4559 if (elf_hash_table (link_info)->dynamic_sections_created)
4560 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
4562 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
4568 /* Find the literal value. */
4569 r_reloc_init (&val.r_rel, abfd, irel);
4570 BFD_ASSERT (rel->r_rel.target_offset < sec->_raw_size);
4571 val.value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset);
4573 /* Check if we've seen another literal with the same value. */
4574 val_map = get_cached_value (values, &val);
4575 if (val_map != NULL)
4577 /* First check that THIS and all the other relocs to this
4578 literal will FIT if we move them to the new address. */
4580 if (relocations_reach (rel, relax_info->src_count - i,
4583 /* Mark that the literal will be coalesced. */
4584 add_removed_literal (&relax_info->removed_list,
4585 &rel->r_rel, &val_map->loc);
4589 /* Relocations do not reach -- do not remove this literal. */
4590 val_map->loc = rel->r_rel;
4595 /* This is the first time we've seen this literal value. */
4596 BFD_ASSERT (sec == r_reloc_get_section (&rel->r_rel));
4597 add_value_map (values, &val, &rel->r_rel);
4602 release_contents (sec, contents);
4603 release_internal_relocs (sec, internal_relocs);
4608 /* Check if the original relocations (presumably on L32R instructions)
4609 identified by reloc[0..N] can be changed to reference the literal
4610 identified by r_rel. If r_rel is out of range for any of the
4611 original relocations, then we don't want to coalesce the original
4612 literal with the one at r_rel. We only check reloc[0..N], where the
4613 offsets are all the same as for reloc[0] (i.e., they're all
4614 referencing the same literal) and where N is also bounded by the
4615 number of remaining entries in the "reloc" array. The "reloc" array
4616 is sorted by target offset so we know all the entries for the same
4617 literal will be contiguous. */
4620 relocations_reach (reloc, remaining_relocs, r_rel)
4621 source_reloc *reloc;
4622 int remaining_relocs;
4623 const r_reloc *r_rel;
4625 bfd_vma from_offset, source_address, dest_address;
4629 if (!r_reloc_is_defined (r_rel))
4632 sec = r_reloc_get_section (r_rel);
4633 from_offset = reloc[0].r_rel.target_offset;
4635 for (i = 0; i < remaining_relocs; i++)
4637 if (reloc[i].r_rel.target_offset != from_offset)
4640 /* Ignore relocations that have been removed. */
4641 if (reloc[i].is_null)
4644 /* The original and new output section for these must be the same
4645 in order to coalesce. */
4646 if (r_reloc_get_section (&reloc[i].r_rel)->output_section
4647 != sec->output_section)
4650 /* A NULL operand means it is not a PC-relative relocation, so
4651 the literal can be moved anywhere. */
4654 /* Otherwise, check to see that it fits. */
4655 source_address = (reloc[i].source_sec->output_section->vma
4656 + reloc[i].source_sec->output_offset
4657 + reloc[i].r_rel.rela.r_offset);
4658 dest_address = (sec->output_section->vma
4659 + sec->output_offset
4660 + r_rel->target_offset);
4662 if (!pcrel_reloc_fits (reloc[i].opnd, source_address, dest_address))
4671 /* WARNING: linear search here. If the relocation are in order by
4672 address, we can use a faster binary search. ALSO, we assume that
4673 there is only 1 non-NONE relocation per address. */
4675 static Elf_Internal_Rela *
4676 get_irel_at_offset (sec, internal_relocs, offset)
4678 Elf_Internal_Rela *internal_relocs;
4682 if (!internal_relocs)
4684 for (i = 0; i < sec->reloc_count; i++)
4686 Elf_Internal_Rela *irel = &internal_relocs[i];
4687 if (irel->r_offset == offset
4688 && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE)
4695 /* Second relaxation pass. */
4697 /* Modify all of the relocations to point to the right spot, and if this
4698 is a relaxable section, delete the unwanted literals and fix the
4702 relax_section (abfd, sec, link_info)
4705 struct bfd_link_info *link_info;
4707 Elf_Internal_Rela *internal_relocs;
4708 xtensa_relax_info *relax_info;
4710 bfd_boolean ok = TRUE;
4713 relax_info = get_xtensa_relax_info (sec);
4714 BFD_ASSERT (relax_info);
4716 /* Handle property sections (e.g., literal tables) specially. */
4717 if (xtensa_is_property_section (sec))
4719 BFD_ASSERT (!relax_info->is_relaxable_literal_section);
4720 return relax_property_section (abfd, sec, link_info);
4723 internal_relocs = retrieve_internal_relocs (abfd, sec,
4724 link_info->keep_memory);
4725 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
4726 if (contents == NULL && sec->_raw_size != 0)
4732 if (internal_relocs)
4734 for (i = 0; i < sec->reloc_count; i++)
4736 Elf_Internal_Rela *irel;
4737 xtensa_relax_info *target_relax_info;
4738 bfd_vma source_offset;
4741 asection *target_sec;
4743 /* Locally change the source address.
4744 Translate the target to the new target address.
4745 If it points to this section and has been removed,
4749 irel = &internal_relocs[i];
4750 source_offset = irel->r_offset;
4752 r_type = ELF32_R_TYPE (irel->r_info);
4753 r_reloc_init (&r_rel, abfd, irel);
4755 if (relax_info->is_relaxable_literal_section)
4757 if (r_type != R_XTENSA_NONE
4758 && find_removed_literal (&relax_info->removed_list,
4761 /* Remove this relocation. */
4762 if (elf_hash_table (link_info)->dynamic_sections_created)
4763 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
4764 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
4765 irel->r_offset = offset_with_removed_literals
4766 (&relax_info->removed_list, irel->r_offset);
4770 offset_with_removed_literals (&relax_info->removed_list,
4772 irel->r_offset = source_offset;
4775 target_sec = r_reloc_get_section (&r_rel);
4776 target_relax_info = get_xtensa_relax_info (target_sec);
4778 if (target_relax_info
4779 && target_relax_info->is_relaxable_literal_section)
4784 translate_reloc (&r_rel, &new_rel);
4786 /* FIXME: If the relocation still references a section in
4787 the same input file, the relocation should be modified
4788 directly instead of adding a "fix" record. */
4790 fix = reloc_bfd_fix_init (sec, source_offset, r_type, 0,
4791 r_reloc_get_section (&new_rel),
4792 new_rel.target_offset);
4796 pin_internal_relocs (sec, internal_relocs);
4800 if (relax_info->is_relaxable_literal_section)
4802 /* Walk through the contents and delete literals that are not needed
4805 unsigned long size = sec->_cooked_size;
4806 unsigned long removed = 0;
4808 removed_literal *reloc = relax_info->removed_list.head;
4809 for (; reloc; reloc = reloc->next)
4811 unsigned long upper = sec->_raw_size;
4812 bfd_vma start = reloc->from.target_offset + 4;
4814 upper = reloc->next->from.target_offset;
4815 if (upper - start != 0)
4817 BFD_ASSERT (start <= upper);
4818 memmove (contents + start - removed - 4,
4821 pin_contents (sec, contents);
4827 /* Change the section size. */
4828 sec->_cooked_size = size;
4829 /* Also shrink _raw_size. (The code in relocate_section that
4830 checks that relocations are within the section must use
4831 _raw_size because of the way the stabs sections are relaxed;
4832 shrinking _raw_size means that these checks will not be
4833 unnecessarily lax.) */
4834 sec->_raw_size = size;
4838 release_internal_relocs (sec, internal_relocs);
4839 release_contents (sec, contents);
4844 /* Fix up a relocation to take account of removed literals. */
4847 translate_reloc (orig_rel, new_rel)
4848 const r_reloc *orig_rel;
4852 xtensa_relax_info *relax_info;
4853 removed_literal *removed;
4854 unsigned long new_offset;
4856 *new_rel = *orig_rel;
4858 if (!r_reloc_is_defined (orig_rel))
4860 sec = r_reloc_get_section (orig_rel);
4862 relax_info = get_xtensa_relax_info (sec);
4863 BFD_ASSERT (relax_info);
4865 if (!relax_info->is_relaxable_literal_section)
4868 /* Check if the original relocation is against a literal being removed. */
4869 removed = find_removed_literal (&relax_info->removed_list,
4870 orig_rel->target_offset);
4875 /* The fact that there is still a relocation to this literal indicates
4876 that the literal is being coalesced, not simply removed. */
4877 BFD_ASSERT (removed->to.abfd != NULL);
4879 /* This was moved to some other address (possibly in another section). */
4880 *new_rel = removed->to;
4881 new_sec = r_reloc_get_section (new_rel);
4885 relax_info = get_xtensa_relax_info (sec);
4886 if (!relax_info || !relax_info->is_relaxable_literal_section)
4891 /* ...and the target address may have been moved within its section. */
4892 new_offset = offset_with_removed_literals (&relax_info->removed_list,
4893 new_rel->target_offset);
4895 /* Modify the offset and addend. */
4896 new_rel->target_offset = new_offset;
4897 new_rel->rela.r_addend += (new_offset - new_rel->target_offset);
4901 /* For dynamic links, there may be a dynamic relocation for each
4902 literal. The number of dynamic relocations must be computed in
4903 size_dynamic_sections, which occurs before relaxation. When a
4904 literal is removed, this function checks if there is a corresponding
4905 dynamic relocation and shrinks the size of the appropriate dynamic
4906 relocation section accordingly. At this point, the contents of the
4907 dynamic relocation sections have not yet been filled in, so there's
4908 nothing else that needs to be done. */
4911 shrink_dynamic_reloc_sections (info, abfd, input_section, rel)
4912 struct bfd_link_info *info;
4914 asection *input_section;
4915 Elf_Internal_Rela *rel;
4917 Elf_Internal_Shdr *symtab_hdr;
4918 struct elf_link_hash_entry **sym_hashes;
4919 unsigned long r_symndx;
4921 struct elf_link_hash_entry *h;
4922 bfd_boolean dynamic_symbol;
4924 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4925 sym_hashes = elf_sym_hashes (abfd);
4927 r_type = ELF32_R_TYPE (rel->r_info);
4928 r_symndx = ELF32_R_SYM (rel->r_info);
4930 if (r_symndx < symtab_hdr->sh_info)
4933 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4935 dynamic_symbol = xtensa_elf_dynamic_symbol_p (info, h);
4937 if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT)
4938 && (input_section->flags & SEC_ALLOC) != 0
4939 && (dynamic_symbol || info->shared))
4942 const char *srel_name;
4944 bfd_boolean is_plt = FALSE;
4946 dynobj = elf_hash_table (info)->dynobj;
4947 BFD_ASSERT (dynobj != NULL);
4949 if (dynamic_symbol && r_type == R_XTENSA_PLT)
4951 srel_name = ".rela.plt";
4955 srel_name = ".rela.got";
4957 /* Reduce size of the .rela.* section by one reloc. */
4958 srel = bfd_get_section_by_name (dynobj, srel_name);
4959 BFD_ASSERT (srel != NULL);
4960 BFD_ASSERT (srel->_cooked_size >= sizeof (Elf32_External_Rela));
4961 srel->_cooked_size -= sizeof (Elf32_External_Rela);
4963 /* Also shrink _raw_size. (This seems wrong but other bfd code seems
4964 to assume that linker-created sections will never be relaxed and
4965 hence _raw_size must always equal _cooked_size.) */
4966 srel->_raw_size = srel->_cooked_size;
4970 asection *splt, *sgotplt, *srelgot;
4971 int reloc_index, chunk;
4973 /* Find the PLT reloc index of the entry being removed. This
4974 is computed from the size of ".rela.plt". It is needed to
4975 figure out which PLT chunk to resize. Usually "last index
4976 = size - 1" since the index starts at zero, but in this
4977 context, the size has just been decremented so there's no
4978 need to subtract one. */
4979 reloc_index = srel->_cooked_size / sizeof (Elf32_External_Rela);
4981 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
4982 splt = elf_xtensa_get_plt_section (dynobj, chunk);
4983 sgotplt = elf_xtensa_get_gotplt_section (dynobj, chunk);
4984 BFD_ASSERT (splt != NULL && sgotplt != NULL);
4986 /* Check if an entire PLT chunk has just been eliminated. */
4987 if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0)
4989 /* The two magic GOT entries for that chunk can go away. */
4990 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4991 BFD_ASSERT (srelgot != NULL);
4992 srelgot->reloc_count -= 2;
4993 srelgot->_cooked_size -= 2 * sizeof (Elf32_External_Rela);
4994 /* Shrink _raw_size (see comment above). */
4995 srelgot->_raw_size = srelgot->_cooked_size;
4997 sgotplt->_cooked_size -= 8;
4999 /* There should be only one entry left (and it will be
5001 BFD_ASSERT (sgotplt->_cooked_size == 4);
5002 BFD_ASSERT (splt->_cooked_size == PLT_ENTRY_SIZE);
5005 BFD_ASSERT (sgotplt->_cooked_size >= 4);
5006 BFD_ASSERT (splt->_cooked_size >= PLT_ENTRY_SIZE);
5008 sgotplt->_cooked_size -= 4;
5009 splt->_cooked_size -= PLT_ENTRY_SIZE;
5011 /* Shrink _raw_sizes (see comment above). */
5012 sgotplt->_raw_size = sgotplt->_cooked_size;
5013 splt->_raw_size = splt->_cooked_size;
5019 /* This is similar to relax_section except that when a target is moved,
5020 we shift addresses up. We also need to modify the size. This
5021 algorithm does NOT allow for relocations into the middle of the
5022 property sections. */
5025 relax_property_section (abfd, sec, link_info)
5028 struct bfd_link_info *link_info;
5030 Elf_Internal_Rela *internal_relocs;
5033 bfd_boolean ok = TRUE;
5035 internal_relocs = retrieve_internal_relocs (abfd, sec,
5036 link_info->keep_memory);
5037 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
5038 if (contents == NULL && sec->_raw_size != 0)
5044 if (internal_relocs)
5046 for (i = 0; i < sec->reloc_count; i++)
5048 Elf_Internal_Rela *irel;
5049 xtensa_relax_info *target_relax_info;
5052 asection *target_sec;
5054 /* Locally change the source address.
5055 Translate the target to the new target address.
5056 If it points to this section and has been removed, MOVE IT.
5057 Also, don't forget to modify the associated SIZE at
5060 irel = &internal_relocs[i];
5061 r_type = ELF32_R_TYPE (irel->r_info);
5062 if (r_type == R_XTENSA_NONE)
5065 r_reloc_init (&r_rel, abfd, irel);
5067 target_sec = r_reloc_get_section (&r_rel);
5068 target_relax_info = get_xtensa_relax_info (target_sec);
5070 if (target_relax_info
5071 && target_relax_info->is_relaxable_literal_section)
5073 /* Translate the relocation's destination. */
5075 bfd_vma new_end_offset;
5077 long old_size, new_size;
5080 offset_with_removed_literals (&target_relax_info->removed_list,
5081 r_rel.target_offset);
5083 /* Assert that we are not out of bounds. */
5084 size_p = &contents[irel->r_offset + 4];
5085 old_size = bfd_get_32 (abfd, &contents[irel->r_offset + 4]);
5088 offset_with_removed_literals (&target_relax_info->removed_list,
5089 r_rel.target_offset + old_size);
5091 new_size = new_end_offset - new_offset;
5092 if (new_size != old_size)
5094 bfd_put_32 (abfd, new_size, size_p);
5095 pin_contents (sec, contents);
5098 if (new_offset != r_rel.target_offset)
5100 bfd_vma diff = new_offset - r_rel.target_offset;
5101 irel->r_addend += diff;
5102 pin_internal_relocs (sec, internal_relocs);
5108 /* Combine adjacent property table entries. This is also done in
5109 finish_dynamic_sections() but at that point it's too late to
5110 reclaim the space in the output section, so we do this twice. */
5112 if (internal_relocs)
5114 Elf_Internal_Rela *last_irel = NULL;
5115 int removed_bytes = 0;
5116 bfd_vma offset, last_irel_offset;
5117 bfd_vma section_size;
5119 /* Walk over memory and irels at the same time.
5120 This REQUIRES that the internal_relocs be sorted by offset. */
5121 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
5122 internal_reloc_compare);
5123 nexti = 0; /* Index into internal_relocs. */
5125 pin_internal_relocs (sec, internal_relocs);
5126 pin_contents (sec, contents);
5128 last_irel_offset = (bfd_vma) -1;
5129 section_size = (sec->_cooked_size ? sec->_cooked_size : sec->_raw_size);
5130 BFD_ASSERT (section_size % 8 == 0);
5132 for (offset = 0; offset < section_size; offset += 8)
5134 Elf_Internal_Rela *irel, *next_irel;
5135 bfd_vma bytes_to_remove, size, actual_offset;
5136 bfd_boolean remove_this_irel;
5141 /* Find the next two relocations (if there are that many left),
5142 skipping over any R_XTENSA_NONE relocs. On entry, "nexti" is
5143 the starting reloc index. After these two loops, "i"
5144 is the index of the first non-NONE reloc past that starting
5145 index, and "nexti" is the index for the next non-NONE reloc
5148 for (i = nexti; i < sec->reloc_count; i++)
5150 if (ELF32_R_TYPE (internal_relocs[i].r_info) != R_XTENSA_NONE)
5152 irel = &internal_relocs[i];
5155 internal_relocs[i].r_offset -= removed_bytes;
5158 for (nexti = i + 1; nexti < sec->reloc_count; nexti++)
5160 if (ELF32_R_TYPE (internal_relocs[nexti].r_info)
5163 next_irel = &internal_relocs[nexti];
5166 internal_relocs[nexti].r_offset -= removed_bytes;
5169 remove_this_irel = FALSE;
5170 bytes_to_remove = 0;
5171 actual_offset = offset - removed_bytes;
5172 size = bfd_get_32 (abfd, &contents[actual_offset + 4]);
5174 /* Check that the irels are sorted by offset,
5175 with only one per address. */
5176 BFD_ASSERT (!irel || (int) irel->r_offset > (int) last_irel_offset);
5177 BFD_ASSERT (!next_irel || next_irel->r_offset > irel->r_offset);
5179 /* Make sure there isn't a reloc on the size field. */
5180 if (irel && irel->r_offset == offset + 4)
5182 irel->r_offset -= removed_bytes;
5183 last_irel_offset = irel->r_offset;
5185 else if (next_irel && next_irel->r_offset == offset + 4)
5188 irel->r_offset -= removed_bytes;
5189 next_irel->r_offset -= removed_bytes;
5190 last_irel_offset = next_irel->r_offset;
5194 /* Always remove entries with zero size. */
5195 bytes_to_remove = 8;
5196 if (irel && irel->r_offset == offset)
5198 remove_this_irel = TRUE;
5200 irel->r_offset -= removed_bytes;
5201 last_irel_offset = irel->r_offset;
5204 else if (irel && irel->r_offset == offset)
5206 if (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32)
5211 bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]);
5212 bfd_vma old_address =
5213 (last_irel->r_addend
5214 + bfd_get_32 (abfd, &contents[last_irel->r_offset]));
5215 bfd_vma new_address =
5217 + bfd_get_32 (abfd, &contents[actual_offset]));
5219 if ((ELF32_R_SYM (irel->r_info) ==
5220 ELF32_R_SYM (last_irel->r_info))
5221 && (old_address + old_size == new_address))
5223 /* fix the old size */
5224 bfd_put_32 (abfd, old_size + size,
5225 &contents[last_irel->r_offset + 4]);
5226 bytes_to_remove = 8;
5227 remove_this_irel = TRUE;
5236 irel->r_offset -= removed_bytes;
5237 last_irel_offset = irel->r_offset;
5240 if (remove_this_irel)
5242 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
5243 irel->r_offset -= bytes_to_remove;
5246 if (bytes_to_remove != 0)
5248 removed_bytes += bytes_to_remove;
5249 if (offset + 8 < section_size)
5250 memmove (&contents[actual_offset],
5251 &contents[actual_offset+8],
5252 section_size - offset - 8);
5258 /* Clear the removed bytes. */
5259 memset (&contents[section_size - removed_bytes], 0, removed_bytes);
5261 sec->_cooked_size = section_size - removed_bytes;
5262 /* Also shrink _raw_size. (The code in relocate_section that
5263 checks that relocations are within the section must use
5264 _raw_size because of the way the stabs sections are
5265 relaxed; shrinking _raw_size means that these checks will
5266 not be unnecessarily lax.) */
5267 sec->_raw_size = sec->_cooked_size;
5272 release_internal_relocs (sec, internal_relocs);
5273 release_contents (sec, contents);
5278 /* Third relaxation pass. */
5280 /* Change symbol values to account for removed literals. */
5283 relax_section_symbols (abfd, sec)
5287 xtensa_relax_info *relax_info;
5288 unsigned int sec_shndx;
5289 Elf_Internal_Shdr *symtab_hdr;
5290 Elf_Internal_Sym *isymbuf;
5291 unsigned i, num_syms, num_locals;
5293 relax_info = get_xtensa_relax_info (sec);
5294 BFD_ASSERT (relax_info);
5296 if (!relax_info->is_relaxable_literal_section)
5299 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5301 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5302 isymbuf = retrieve_local_syms (abfd);
5304 num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
5305 num_locals = symtab_hdr->sh_info;
5307 /* Adjust the local symbols defined in this section. */
5308 for (i = 0; i < num_locals; i++)
5310 Elf_Internal_Sym *isym = &isymbuf[i];
5312 if (isym->st_shndx == sec_shndx)
5314 bfd_vma new_address = offset_with_removed_literals
5315 (&relax_info->removed_list, isym->st_value);
5316 if (new_address != isym->st_value)
5317 isym->st_value = new_address;
5321 /* Now adjust the global symbols defined in this section. */
5322 for (i = 0; i < (num_syms - num_locals); i++)
5324 struct elf_link_hash_entry *sym_hash;
5326 sym_hash = elf_sym_hashes (abfd)[i];
5328 if (sym_hash->root.type == bfd_link_hash_warning)
5329 sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link;
5331 if ((sym_hash->root.type == bfd_link_hash_defined
5332 || sym_hash->root.type == bfd_link_hash_defweak)
5333 && sym_hash->root.u.def.section == sec)
5335 bfd_vma new_address = offset_with_removed_literals
5336 (&relax_info->removed_list, sym_hash->root.u.def.value);
5337 if (new_address != sym_hash->root.u.def.value)
5338 sym_hash->root.u.def.value = new_address;
5346 /* "Fix" handling functions, called while performing relocations. */
5349 do_fix_for_relocateable_link (rel, input_bfd, input_section)
5350 Elf_Internal_Rela *rel;
5352 asection *input_section;
5355 asection *sec, *old_sec;
5357 int r_type = ELF32_R_TYPE (rel->r_info);
5358 reloc_bfd_fix *fix_list;
5361 if (r_type == R_XTENSA_NONE)
5364 fix_list = (get_xtensa_relax_info (input_section))->fix_list;
5365 if (fix_list == NULL)
5368 fix = get_bfd_fix (fix_list, input_section, rel->r_offset, r_type);
5372 r_reloc_init (&r_rel, input_bfd, rel);
5373 old_sec = r_reloc_get_section (&r_rel);
5374 old_offset = r_reloc_get_target_offset (&r_rel);
5376 if (old_sec == NULL || !r_reloc_is_defined (&r_rel))
5378 BFD_ASSERT (r_type == R_XTENSA_ASM_EXPAND);
5379 /* Leave it be. Resolution will happen in a later stage. */
5383 sec = fix->target_sec;
5384 rel->r_addend += ((sec->output_offset + fix->target_offset)
5385 - (old_sec->output_offset + old_offset));
5391 do_fix_for_final_link (rel, input_section, relocationp)
5392 Elf_Internal_Rela *rel;
5393 asection *input_section;
5394 bfd_vma *relocationp;
5397 int r_type = ELF32_R_TYPE (rel->r_info);
5398 reloc_bfd_fix *fix_list;
5401 if (r_type == R_XTENSA_NONE)
5404 fix_list = (get_xtensa_relax_info (input_section))->fix_list;
5405 if (fix_list == NULL)
5408 fix = get_bfd_fix (fix_list, input_section, rel->r_offset, r_type);
5412 sec = fix->target_sec;
5413 *relocationp = (sec->output_section->vma
5414 + sec->output_offset
5415 + fix->target_offset - rel->r_addend);
5419 /* Miscellaneous utility functions.... */
5422 elf_xtensa_get_plt_section (dynobj, chunk)
5429 return bfd_get_section_by_name (dynobj, ".plt");
5431 sprintf (plt_name, ".plt.%u", chunk);
5432 return bfd_get_section_by_name (dynobj, plt_name);
5437 elf_xtensa_get_gotplt_section (dynobj, chunk)
5444 return bfd_get_section_by_name (dynobj, ".got.plt");
5446 sprintf (got_name, ".got.plt.%u", chunk);
5447 return bfd_get_section_by_name (dynobj, got_name);
5451 /* Get the input section for a given symbol index.
5453 . a section symbol, return the section;
5454 . a common symbol, return the common section;
5455 . an undefined symbol, return the undefined section;
5456 . an indirect symbol, follow the links;
5457 . an absolute value, return the absolute section. */
5460 get_elf_r_symndx_section (abfd, r_symndx)
5462 unsigned long r_symndx;
5464 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5465 asection *target_sec = NULL;
5466 if (r_symndx < symtab_hdr->sh_info)
5468 Elf_Internal_Sym *isymbuf;
5469 unsigned int section_index;
5471 isymbuf = retrieve_local_syms (abfd);
5472 section_index = isymbuf[r_symndx].st_shndx;
5474 if (section_index == SHN_UNDEF)
5475 target_sec = bfd_und_section_ptr;
5476 else if (section_index > 0 && section_index < SHN_LORESERVE)
5477 target_sec = bfd_section_from_elf_index (abfd, section_index);
5478 else if (section_index == SHN_ABS)
5479 target_sec = bfd_abs_section_ptr;
5480 else if (section_index == SHN_COMMON)
5481 target_sec = bfd_com_section_ptr;
5488 unsigned long indx = r_symndx - symtab_hdr->sh_info;
5489 struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx];
5491 while (h->root.type == bfd_link_hash_indirect
5492 || h->root.type == bfd_link_hash_warning)
5493 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5495 switch (h->root.type)
5497 case bfd_link_hash_defined:
5498 case bfd_link_hash_defweak:
5499 target_sec = h->root.u.def.section;
5501 case bfd_link_hash_common:
5502 target_sec = bfd_com_section_ptr;
5504 case bfd_link_hash_undefined:
5505 case bfd_link_hash_undefweak:
5506 target_sec = bfd_und_section_ptr;
5508 default: /* New indirect warning. */
5509 target_sec = bfd_und_section_ptr;
5517 static struct elf_link_hash_entry *
5518 get_elf_r_symndx_hash_entry (abfd, r_symndx)
5520 unsigned long r_symndx;
5523 struct elf_link_hash_entry *h;
5524 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5526 if (r_symndx < symtab_hdr->sh_info)
5529 indx = r_symndx - symtab_hdr->sh_info;
5530 h = elf_sym_hashes (abfd)[indx];
5531 while (h->root.type == bfd_link_hash_indirect
5532 || h->root.type == bfd_link_hash_warning)
5533 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5538 /* Get the section-relative offset for a symbol number. */
5541 get_elf_r_symndx_offset (abfd, r_symndx)
5543 unsigned long r_symndx;
5545 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5548 if (r_symndx < symtab_hdr->sh_info)
5550 Elf_Internal_Sym *isymbuf;
5551 isymbuf = retrieve_local_syms (abfd);
5552 offset = isymbuf[r_symndx].st_value;
5556 unsigned long indx = r_symndx - symtab_hdr->sh_info;
5557 struct elf_link_hash_entry *h =
5558 elf_sym_hashes (abfd)[indx];
5560 while (h->root.type == bfd_link_hash_indirect
5561 || h->root.type == bfd_link_hash_warning)
5562 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5563 if (h->root.type == bfd_link_hash_defined
5564 || h->root.type == bfd_link_hash_defweak)
5565 offset = h->root.u.def.value;
5572 pcrel_reloc_fits (opnd, self_address, dest_address)
5573 xtensa_operand opnd;
5574 bfd_vma self_address;
5575 bfd_vma dest_address;
5577 uint32 new_address =
5578 xtensa_operand_do_reloc (opnd, dest_address, self_address);
5579 return (xtensa_operand_encode (opnd, &new_address)
5580 == xtensa_encode_result_ok);
5585 xtensa_is_property_section (sec)
5588 static int len = sizeof (".gnu.linkonce.t.") - 1;
5590 return (strcmp (".xt.insn", sec->name) == 0
5591 || strcmp (".xt.lit", sec->name) == 0
5592 || strncmp (".gnu.linkonce.x.", sec->name, len) == 0
5593 || strncmp (".gnu.linkonce.p.", sec->name, len) == 0);
5598 is_literal_section (sec)
5601 /* FIXME: the current definition of this leaves a lot to be desired.... */
5602 if (sec == NULL || sec->name == NULL)
5604 return (strstr (sec->name, "literal") != NULL);
5609 internal_reloc_compare (ap, bp)
5613 const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap;
5614 const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp;
5616 return (a->r_offset - b->r_offset);
5621 get_is_linkonce_section (abfd, sec)
5622 bfd *abfd ATTRIBUTE_UNUSED;
5625 flagword flags, link_once_flags;
5626 bfd_boolean is_linkonce = FALSE;;
5628 flags = bfd_get_section_flags (abfd, sec);
5629 link_once_flags = (flags & SEC_LINK_ONCE);
5630 if (link_once_flags != 0)
5633 /* In order for this to be useful to the assembler
5634 before the linkonce flag is set we need to
5635 check for the GNU extension name. */
5637 strncmp (sec->name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
5645 xtensa_get_property_section_name (abfd, sec, base_name)
5648 const char * base_name;
5650 char *table_sec_name = NULL;
5651 bfd_boolean is_linkonce;
5653 is_linkonce = get_is_linkonce_section (abfd, sec);
5657 table_sec_name = strdup (base_name);
5661 static size_t prefix_len = sizeof (".gnu.linkonce.t.") - 1;
5662 size_t len = strlen (sec->name) + 1;
5663 char repl_char = '\0';
5664 const char *segname = sec->name;
5666 if (strncmp (segname, ".gnu.linkonce.t.", prefix_len) == 0)
5668 if (strcmp (base_name, ".xt.insn") == 0)
5670 else if (strcmp (base_name, ".xt.lit") == 0)
5674 if (repl_char != '\0')
5676 char *name = (char *) bfd_malloc (len);
5677 memcpy (name, sec->name, len);
5678 name[prefix_len - 2] = repl_char;
5679 table_sec_name = name;
5683 size_t base_len = strlen (base_name) + 1;
5684 char *name = (char *) bfd_malloc (len + base_len);
5685 memcpy (name, sec->name, len - 1);
5686 memcpy (name + len - 1, base_name, base_len);
5687 table_sec_name = name;
5691 return table_sec_name;
5695 /* Other functions called directly by the linker. */
5698 xtensa_callback_required_dependence (abfd, sec, link_info, callback, closure)
5701 struct bfd_link_info *link_info;
5702 deps_callback_t callback;
5705 Elf_Internal_Rela *internal_relocs;
5708 bfd_boolean ok = TRUE;
5710 /* ".plt*" sections have no explicit relocations but they contain L32R
5711 instructions that reference the corresponding ".got.plt*" sections. */
5712 if ((sec->flags & SEC_LINKER_CREATED) != 0
5713 && strncmp (sec->name, ".plt", 4) == 0)
5717 /* Find the corresponding ".got.plt*" section. */
5718 if (sec->name[4] == '\0')
5719 sgotplt = bfd_get_section_by_name (sec->owner, ".got.plt");
5725 BFD_ASSERT (sec->name[4] == '.');
5726 chunk = strtol (&sec->name[5], NULL, 10);
5728 sprintf (got_name, ".got.plt.%u", chunk);
5729 sgotplt = bfd_get_section_by_name (sec->owner, got_name);
5731 BFD_ASSERT (sgotplt);
5733 /* Assume worst-case offsets: L32R at the very end of the ".plt"
5734 section referencing a literal at the very beginning of
5735 ".got.plt". This is very close to the real dependence, anyway. */
5736 (*callback) (sec, sec->_raw_size, sgotplt, 0, closure);
5739 internal_relocs = retrieve_internal_relocs (abfd, sec,
5740 link_info->keep_memory);
5741 if (internal_relocs == NULL
5742 || sec->reloc_count == 0)
5745 /* Cache the contents for the duration of this scan. */
5746 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
5747 if (contents == NULL && sec->_raw_size != 0)
5753 if (xtensa_default_isa == NULL)
5756 for (i = 0; i < sec->reloc_count; i++)
5758 Elf_Internal_Rela *irel = &internal_relocs[i];
5759 if (is_l32r_relocation (sec, contents, irel))
5762 asection *target_sec;
5763 bfd_vma target_offset;
5765 r_reloc_init (&l32r_rel, abfd, irel);
5768 /* L32Rs must be local to the input file. */
5769 if (r_reloc_is_defined (&l32r_rel))
5771 target_sec = r_reloc_get_section (&l32r_rel);
5772 target_offset = r_reloc_get_target_offset (&l32r_rel);
5774 (*callback) (sec, irel->r_offset, target_sec, target_offset,
5780 release_internal_relocs (sec, internal_relocs);
5781 release_contents (sec, contents);
5787 #define TARGET_LITTLE_SYM bfd_elf32_xtensa_le_vec
5788 #define TARGET_LITTLE_NAME "elf32-xtensa-le"
5789 #define TARGET_BIG_SYM bfd_elf32_xtensa_be_vec
5790 #define TARGET_BIG_NAME "elf32-xtensa-be"
5791 #define ELF_ARCH bfd_arch_xtensa
5793 /* The new EM_XTENSA value will be recognized beginning in the Xtensa T1040
5794 release. However, we still have to generate files with the EM_XTENSA_OLD
5795 value so that pre-T1040 tools can read the files. As soon as we stop
5796 caring about pre-T1040 tools, the following two values should be
5797 swapped. At the same time, any other code that uses EM_XTENSA_OLD
5798 (e.g., prep_headers() in elf.c) should be changed to use EM_XTENSA. */
5799 #define ELF_MACHINE_CODE EM_XTENSA_OLD
5800 #define ELF_MACHINE_ALT1 EM_XTENSA
5803 #define ELF_MAXPAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE)
5804 #else /* !XCHAL_HAVE_MMU */
5805 #define ELF_MAXPAGESIZE 1
5806 #endif /* !XCHAL_HAVE_MMU */
5807 #endif /* ELF_ARCH */
5809 #define elf_backend_can_gc_sections 1
5810 #define elf_backend_can_refcount 1
5811 #define elf_backend_plt_readonly 1
5812 #define elf_backend_got_header_size 4
5813 #define elf_backend_want_dynbss 0
5814 #define elf_backend_want_got_plt 1
5816 #define elf_info_to_howto elf_xtensa_info_to_howto_rela
5818 #define bfd_elf32_bfd_final_link bfd_elf32_bfd_final_link
5819 #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data
5820 #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook
5821 #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data
5822 #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section
5823 #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup
5824 #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags
5826 #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol
5827 #define elf_backend_check_relocs elf_xtensa_check_relocs
5828 #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol
5829 #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections
5830 #define elf_backend_discard_info elf_xtensa_discard_info
5831 #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs
5832 #define elf_backend_final_write_processing elf_xtensa_final_write_processing
5833 #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections
5834 #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol
5835 #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook
5836 #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook
5837 #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus
5838 #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo
5839 #define elf_backend_hide_symbol elf_xtensa_hide_symbol
5840 #define elf_backend_modify_segment_map elf_xtensa_modify_segment_map
5841 #define elf_backend_object_p elf_xtensa_object_p
5842 #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class
5843 #define elf_backend_relocate_section elf_xtensa_relocate_section
5844 #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections
5846 #include "elf32-target.h"