1 /* SPU specific support for 32-bit ELF
3 Copyright (C) 2006-2019 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "libiberty.h"
28 #include "elf32-spu.h"
30 /* We use RELA style relocs. Don't define USE_REL. */
32 static bfd_reloc_status_type spu_elf_rel9 (bfd *, arelent *, asymbol *,
36 /* Values of type 'enum elf_spu_reloc_type' are used to index this
37 array, so it must be declared in the order of that type. */
39 static reloc_howto_type elf_howto_table[] = {
40 HOWTO (R_SPU_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
41 bfd_elf_generic_reloc, "SPU_NONE",
42 FALSE, 0, 0x00000000, FALSE),
43 HOWTO (R_SPU_ADDR10, 4, 2, 10, FALSE, 14, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "SPU_ADDR10",
45 FALSE, 0, 0x00ffc000, FALSE),
46 HOWTO (R_SPU_ADDR16, 2, 2, 16, FALSE, 7, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "SPU_ADDR16",
48 FALSE, 0, 0x007fff80, FALSE),
49 HOWTO (R_SPU_ADDR16_HI, 16, 2, 16, FALSE, 7, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "SPU_ADDR16_HI",
51 FALSE, 0, 0x007fff80, FALSE),
52 HOWTO (R_SPU_ADDR16_LO, 0, 2, 16, FALSE, 7, complain_overflow_dont,
53 bfd_elf_generic_reloc, "SPU_ADDR16_LO",
54 FALSE, 0, 0x007fff80, FALSE),
55 HOWTO (R_SPU_ADDR18, 0, 2, 18, FALSE, 7, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "SPU_ADDR18",
57 FALSE, 0, 0x01ffff80, FALSE),
58 HOWTO (R_SPU_ADDR32, 0, 2, 32, FALSE, 0, complain_overflow_dont,
59 bfd_elf_generic_reloc, "SPU_ADDR32",
60 FALSE, 0, 0xffffffff, FALSE),
61 HOWTO (R_SPU_REL16, 2, 2, 16, TRUE, 7, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "SPU_REL16",
63 FALSE, 0, 0x007fff80, TRUE),
64 HOWTO (R_SPU_ADDR7, 0, 2, 7, FALSE, 14, complain_overflow_dont,
65 bfd_elf_generic_reloc, "SPU_ADDR7",
66 FALSE, 0, 0x001fc000, FALSE),
67 HOWTO (R_SPU_REL9, 2, 2, 9, TRUE, 0, complain_overflow_signed,
68 spu_elf_rel9, "SPU_REL9",
69 FALSE, 0, 0x0180007f, TRUE),
70 HOWTO (R_SPU_REL9I, 2, 2, 9, TRUE, 0, complain_overflow_signed,
71 spu_elf_rel9, "SPU_REL9I",
72 FALSE, 0, 0x0000c07f, TRUE),
73 HOWTO (R_SPU_ADDR10I, 0, 2, 10, FALSE, 14, complain_overflow_signed,
74 bfd_elf_generic_reloc, "SPU_ADDR10I",
75 FALSE, 0, 0x00ffc000, FALSE),
76 HOWTO (R_SPU_ADDR16I, 0, 2, 16, FALSE, 7, complain_overflow_signed,
77 bfd_elf_generic_reloc, "SPU_ADDR16I",
78 FALSE, 0, 0x007fff80, FALSE),
79 HOWTO (R_SPU_REL32, 0, 2, 32, TRUE, 0, complain_overflow_dont,
80 bfd_elf_generic_reloc, "SPU_REL32",
81 FALSE, 0, 0xffffffff, TRUE),
82 HOWTO (R_SPU_ADDR16X, 0, 2, 16, FALSE, 7, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "SPU_ADDR16X",
84 FALSE, 0, 0x007fff80, FALSE),
85 HOWTO (R_SPU_PPU32, 0, 2, 32, FALSE, 0, complain_overflow_dont,
86 bfd_elf_generic_reloc, "SPU_PPU32",
87 FALSE, 0, 0xffffffff, FALSE),
88 HOWTO (R_SPU_PPU64, 0, 4, 64, FALSE, 0, complain_overflow_dont,
89 bfd_elf_generic_reloc, "SPU_PPU64",
91 HOWTO (R_SPU_ADD_PIC, 0, 0, 0, FALSE, 0, complain_overflow_dont,
92 bfd_elf_generic_reloc, "SPU_ADD_PIC",
93 FALSE, 0, 0x00000000, FALSE),
96 static struct bfd_elf_special_section const spu_elf_special_sections[] = {
97 { "._ea", 4, 0, SHT_PROGBITS, SHF_WRITE },
98 { ".toe", 4, 0, SHT_NOBITS, SHF_ALLOC },
102 static enum elf_spu_reloc_type
103 spu_elf_bfd_to_reloc_type (bfd_reloc_code_real_type code)
108 return (enum elf_spu_reloc_type) -1;
111 case BFD_RELOC_SPU_IMM10W:
113 case BFD_RELOC_SPU_IMM16W:
115 case BFD_RELOC_SPU_LO16:
116 return R_SPU_ADDR16_LO;
117 case BFD_RELOC_SPU_HI16:
118 return R_SPU_ADDR16_HI;
119 case BFD_RELOC_SPU_IMM18:
121 case BFD_RELOC_SPU_PCREL16:
123 case BFD_RELOC_SPU_IMM7:
125 case BFD_RELOC_SPU_IMM8:
127 case BFD_RELOC_SPU_PCREL9a:
129 case BFD_RELOC_SPU_PCREL9b:
131 case BFD_RELOC_SPU_IMM10:
132 return R_SPU_ADDR10I;
133 case BFD_RELOC_SPU_IMM16:
134 return R_SPU_ADDR16I;
137 case BFD_RELOC_32_PCREL:
139 case BFD_RELOC_SPU_PPU32:
141 case BFD_RELOC_SPU_PPU64:
143 case BFD_RELOC_SPU_ADD_PIC:
144 return R_SPU_ADD_PIC;
149 spu_elf_info_to_howto (bfd *abfd,
151 Elf_Internal_Rela *dst)
153 enum elf_spu_reloc_type r_type;
155 r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info);
156 /* PR 17512: file: 90c2a92e. */
157 if (r_type >= R_SPU_max)
159 /* xgettext:c-format */
160 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
162 bfd_set_error (bfd_error_bad_value);
165 cache_ptr->howto = &elf_howto_table[(int) r_type];
169 static reloc_howto_type *
170 spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
171 bfd_reloc_code_real_type code)
173 enum elf_spu_reloc_type r_type = spu_elf_bfd_to_reloc_type (code);
175 if (r_type == (enum elf_spu_reloc_type) -1)
178 return elf_howto_table + r_type;
181 static reloc_howto_type *
182 spu_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
187 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
188 if (elf_howto_table[i].name != NULL
189 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
190 return &elf_howto_table[i];
195 /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */
197 static bfd_reloc_status_type
198 spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
199 void *data, asection *input_section,
200 bfd *output_bfd, char **error_message)
202 bfd_size_type octets;
206 /* If this is a relocatable link (output_bfd test tells us), just
207 call the generic function. Any adjustment will be done at final
209 if (output_bfd != NULL)
210 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
211 input_section, output_bfd, error_message);
213 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
214 return bfd_reloc_outofrange;
215 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
217 /* Get symbol value. */
219 if (!bfd_is_com_section (symbol->section))
221 if (symbol->section->output_section)
222 val += symbol->section->output_section->vma;
224 val += reloc_entry->addend;
226 /* Make it pc-relative. */
227 val -= input_section->output_section->vma + input_section->output_offset;
230 if (val + 256 >= 512)
231 return bfd_reloc_overflow;
233 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
235 /* Move two high bits of value to REL9I and REL9 position.
236 The mask will take care of selecting the right field. */
237 val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16);
238 insn &= ~reloc_entry->howto->dst_mask;
239 insn |= val & reloc_entry->howto->dst_mask;
240 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
245 spu_elf_new_section_hook (bfd *abfd, asection *sec)
247 if (!sec->used_by_bfd)
249 struct _spu_elf_section_data *sdata;
251 sdata = bfd_zalloc (abfd, sizeof (*sdata));
254 sec->used_by_bfd = sdata;
257 return _bfd_elf_new_section_hook (abfd, sec);
260 /* Set up overlay info for executables. */
263 spu_elf_object_p (bfd *abfd)
265 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
267 unsigned int i, num_ovl, num_buf;
268 Elf_Internal_Phdr *phdr = elf_tdata (abfd)->phdr;
269 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
270 Elf_Internal_Phdr *last_phdr = NULL;
272 for (num_buf = 0, num_ovl = 0, i = 0; i < ehdr->e_phnum; i++, phdr++)
273 if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_OVERLAY) != 0)
278 if (last_phdr == NULL
279 || ((last_phdr->p_vaddr ^ phdr->p_vaddr) & 0x3ffff) != 0)
282 for (j = 1; j < elf_numsections (abfd); j++)
284 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[j];
286 if (ELF_SECTION_SIZE (shdr, phdr) != 0
287 && ELF_SECTION_IN_SEGMENT (shdr, phdr))
289 asection *sec = shdr->bfd_section;
290 spu_elf_section_data (sec)->u.o.ovl_index = num_ovl;
291 spu_elf_section_data (sec)->u.o.ovl_buf = num_buf;
299 /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that
300 strip --strip-unneeded will not remove them. */
303 spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
305 if (sym->name != NULL
306 && sym->section != bfd_abs_section_ptr
307 && strncmp (sym->name, "_EAR_", 5) == 0)
308 sym->flags |= BSF_KEEP;
311 /* SPU ELF linker hash table. */
313 struct spu_link_hash_table
315 struct elf_link_hash_table elf;
317 struct spu_elf_params *params;
319 /* Shortcuts to overlay sections. */
325 /* Count of stubs in each overlay section. */
326 unsigned int *stub_count;
328 /* The stub section for each overlay section. */
331 struct elf_link_hash_entry *ovly_entry[2];
333 /* Number of overlay buffers. */
334 unsigned int num_buf;
336 /* Total number of overlays. */
337 unsigned int num_overlays;
339 /* For soft icache. */
340 unsigned int line_size_log2;
341 unsigned int num_lines_log2;
342 unsigned int fromelem_size_log2;
344 /* How much memory we have. */
345 unsigned int local_store;
347 /* Count of overlay stubs needed in non-overlay area. */
348 unsigned int non_ovly_stub;
350 /* Pointer to the fixup section */
354 unsigned int stub_err : 1;
357 /* Hijack the generic got fields for overlay stub accounting. */
361 struct got_entry *next;
370 #define spu_hash_table(p) \
371 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
372 == SPU_ELF_DATA ? ((struct spu_link_hash_table *) ((p)->hash)) : NULL)
376 struct function_info *fun;
377 struct call_info *next;
379 unsigned int max_depth;
380 unsigned int is_tail : 1;
381 unsigned int is_pasted : 1;
382 unsigned int broken_cycle : 1;
383 unsigned int priority : 13;
388 /* List of functions called. Also branches to hot/cold part of
390 struct call_info *call_list;
391 /* For hot/cold part of function, point to owner. */
392 struct function_info *start;
393 /* Symbol at start of function. */
395 Elf_Internal_Sym *sym;
396 struct elf_link_hash_entry *h;
398 /* Function section. */
401 /* Where last called from, and number of sections called from. */
402 asection *last_caller;
403 unsigned int call_count;
404 /* Address range of (this part of) function. */
406 /* Offset where we found a store of lr, or -1 if none found. */
408 /* Offset where we found the stack adjustment insn. */
412 /* Distance from root of call tree. Tail and hot/cold branches
413 count as one deeper. We aren't counting stack frames here. */
415 /* Set if global symbol. */
416 unsigned int global : 1;
417 /* Set if known to be start of function (as distinct from a hunk
418 in hot/cold section. */
419 unsigned int is_func : 1;
420 /* Set if not a root node. */
421 unsigned int non_root : 1;
422 /* Flags used during call tree traversal. It's cheaper to replicate
423 the visit flags than have one which needs clearing after a traversal. */
424 unsigned int visit1 : 1;
425 unsigned int visit2 : 1;
426 unsigned int marking : 1;
427 unsigned int visit3 : 1;
428 unsigned int visit4 : 1;
429 unsigned int visit5 : 1;
430 unsigned int visit6 : 1;
431 unsigned int visit7 : 1;
434 struct spu_elf_stack_info
438 /* Variable size array describing functions, one per contiguous
439 address range belonging to a function. */
440 struct function_info fun[1];
443 static struct function_info *find_function (asection *, bfd_vma,
444 struct bfd_link_info *);
446 /* Create a spu ELF linker hash table. */
448 static struct bfd_link_hash_table *
449 spu_elf_link_hash_table_create (bfd *abfd)
451 struct spu_link_hash_table *htab;
453 htab = bfd_zmalloc (sizeof (*htab));
457 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd,
458 _bfd_elf_link_hash_newfunc,
459 sizeof (struct elf_link_hash_entry),
466 htab->elf.init_got_refcount.refcount = 0;
467 htab->elf.init_got_refcount.glist = NULL;
468 htab->elf.init_got_offset.offset = 0;
469 htab->elf.init_got_offset.glist = NULL;
470 return &htab->elf.root;
474 spu_elf_setup (struct bfd_link_info *info, struct spu_elf_params *params)
476 bfd_vma max_branch_log2;
478 struct spu_link_hash_table *htab = spu_hash_table (info);
479 htab->params = params;
480 htab->line_size_log2 = bfd_log2 (htab->params->line_size);
481 htab->num_lines_log2 = bfd_log2 (htab->params->num_lines);
483 /* For the software i-cache, we provide a "from" list whose size
484 is a power-of-two number of quadwords, big enough to hold one
485 byte per outgoing branch. Compute this number here. */
486 max_branch_log2 = bfd_log2 (htab->params->max_branch);
487 htab->fromelem_size_log2 = max_branch_log2 > 4 ? max_branch_log2 - 4 : 0;
490 /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP
491 to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set
492 *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */
495 get_sym_h (struct elf_link_hash_entry **hp,
496 Elf_Internal_Sym **symp,
498 Elf_Internal_Sym **locsymsp,
499 unsigned long r_symndx,
502 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
504 if (r_symndx >= symtab_hdr->sh_info)
506 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
507 struct elf_link_hash_entry *h;
509 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
510 while (h->root.type == bfd_link_hash_indirect
511 || h->root.type == bfd_link_hash_warning)
512 h = (struct elf_link_hash_entry *) h->root.u.i.link;
522 asection *symsec = NULL;
523 if (h->root.type == bfd_link_hash_defined
524 || h->root.type == bfd_link_hash_defweak)
525 symsec = h->root.u.def.section;
531 Elf_Internal_Sym *sym;
532 Elf_Internal_Sym *locsyms = *locsymsp;
536 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
538 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
540 0, NULL, NULL, NULL);
545 sym = locsyms + r_symndx;
554 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
560 /* Create the note section if not already present. This is done early so
561 that the linker maps the sections to the right place in the output. */
564 spu_elf_create_sections (struct bfd_link_info *info)
566 struct spu_link_hash_table *htab = spu_hash_table (info);
569 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
570 if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL)
575 /* Make SPU_PTNOTE_SPUNAME section. */
582 ibfd = info->input_bfds;
583 /* This should really be SEC_LINKER_CREATED, but then we'd need
584 to write out the section ourselves. */
585 flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
586 s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags);
588 || !bfd_set_section_alignment (ibfd, s, 4))
590 /* Because we didn't set SEC_LINKER_CREATED we need to set the
591 proper section type. */
592 elf_section_type (s) = SHT_NOTE;
594 name_len = strlen (bfd_get_filename (info->output_bfd)) + 1;
595 size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4);
596 size += (name_len + 3) & -4;
598 if (!bfd_set_section_size (ibfd, s, size))
601 data = bfd_zalloc (ibfd, size);
605 bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0);
606 bfd_put_32 (ibfd, name_len, data + 4);
607 bfd_put_32 (ibfd, 1, data + 8);
608 memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME));
609 memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4),
610 bfd_get_filename (info->output_bfd), name_len);
614 if (htab->params->emit_fixups)
619 if (htab->elf.dynobj == NULL)
620 htab->elf.dynobj = ibfd;
621 ibfd = htab->elf.dynobj;
622 flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY | SEC_HAS_CONTENTS
623 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
624 s = bfd_make_section_anyway_with_flags (ibfd, ".fixup", flags);
625 if (s == NULL || !bfd_set_section_alignment (ibfd, s, 2))
633 /* qsort predicate to sort sections by vma. */
636 sort_sections (const void *a, const void *b)
638 const asection *const *s1 = a;
639 const asection *const *s2 = b;
640 bfd_signed_vma delta = (*s1)->vma - (*s2)->vma;
643 return delta < 0 ? -1 : 1;
645 return (*s1)->index - (*s2)->index;
648 /* Identify overlays in the output bfd, and number them.
649 Returns 0 on error, 1 if no overlays, 2 if overlays. */
652 spu_elf_find_overlays (struct bfd_link_info *info)
654 struct spu_link_hash_table *htab = spu_hash_table (info);
655 asection **alloc_sec;
656 unsigned int i, n, ovl_index, num_buf;
659 static const char *const entry_names[2][2] = {
660 { "__ovly_load", "__icache_br_handler" },
661 { "__ovly_return", "__icache_call_handler" }
664 if (info->output_bfd->section_count < 2)
668 = bfd_malloc (info->output_bfd->section_count * sizeof (*alloc_sec));
669 if (alloc_sec == NULL)
672 /* Pick out all the alloced sections. */
673 for (n = 0, s = info->output_bfd->sections; s != NULL; s = s->next)
674 if ((s->flags & SEC_ALLOC) != 0
675 && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL
685 /* Sort them by vma. */
686 qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections);
688 ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size;
689 if (htab->params->ovly_flavour == ovly_soft_icache)
691 unsigned int prev_buf = 0, set_id = 0;
693 /* Look for an overlapping vma to find the first overlay section. */
694 bfd_vma vma_start = 0;
696 for (i = 1; i < n; i++)
699 if (s->vma < ovl_end)
701 asection *s0 = alloc_sec[i - 1];
705 << (htab->num_lines_log2 + htab->line_size_log2)));
710 ovl_end = s->vma + s->size;
713 /* Now find any sections within the cache area. */
714 for (ovl_index = 0, num_buf = 0; i < n; i++)
717 if (s->vma >= ovl_end)
720 /* A section in an overlay area called .ovl.init is not
721 an overlay, in the sense that it might be loaded in
722 by the overlay manager, but rather the initial
723 section contents for the overlay buffer. */
724 if (strncmp (s->name, ".ovl.init", 9) != 0)
726 num_buf = ((s->vma - vma_start) >> htab->line_size_log2) + 1;
727 set_id = (num_buf == prev_buf)? set_id + 1 : 0;
730 if ((s->vma - vma_start) & (htab->params->line_size - 1))
732 info->callbacks->einfo (_("%X%P: overlay section %pA "
733 "does not start on a cache line\n"),
735 bfd_set_error (bfd_error_bad_value);
738 else if (s->size > htab->params->line_size)
740 info->callbacks->einfo (_("%X%P: overlay section %pA "
741 "is larger than a cache line\n"),
743 bfd_set_error (bfd_error_bad_value);
747 alloc_sec[ovl_index++] = s;
748 spu_elf_section_data (s)->u.o.ovl_index
749 = (set_id << htab->num_lines_log2) + num_buf;
750 spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
754 /* Ensure there are no more overlay sections. */
758 if (s->vma < ovl_end)
760 info->callbacks->einfo (_("%X%P: overlay section %pA "
761 "is not in cache area\n"),
763 bfd_set_error (bfd_error_bad_value);
767 ovl_end = s->vma + s->size;
772 /* Look for overlapping vmas. Any with overlap must be overlays.
773 Count them. Also count the number of overlay regions. */
774 for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++)
777 if (s->vma < ovl_end)
779 asection *s0 = alloc_sec[i - 1];
781 if (spu_elf_section_data (s0)->u.o.ovl_index == 0)
784 if (strncmp (s0->name, ".ovl.init", 9) != 0)
786 alloc_sec[ovl_index] = s0;
787 spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index;
788 spu_elf_section_data (s0)->u.o.ovl_buf = num_buf;
791 ovl_end = s->vma + s->size;
793 if (strncmp (s->name, ".ovl.init", 9) != 0)
795 alloc_sec[ovl_index] = s;
796 spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index;
797 spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
798 if (s0->vma != s->vma)
800 /* xgettext:c-format */
801 info->callbacks->einfo (_("%X%P: overlay sections %pA "
802 "and %pA do not start at the "
805 bfd_set_error (bfd_error_bad_value);
808 if (ovl_end < s->vma + s->size)
809 ovl_end = s->vma + s->size;
813 ovl_end = s->vma + s->size;
817 htab->num_overlays = ovl_index;
818 htab->num_buf = num_buf;
819 htab->ovl_sec = alloc_sec;
824 for (i = 0; i < 2; i++)
827 struct elf_link_hash_entry *h;
829 name = entry_names[i][htab->params->ovly_flavour];
830 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
834 if (h->root.type == bfd_link_hash_new)
836 h->root.type = bfd_link_hash_undefined;
838 h->ref_regular_nonweak = 1;
841 htab->ovly_entry[i] = h;
847 /* Non-zero to use bra in overlay stubs rather than br. */
850 #define BRA 0x30000000
851 #define BRASL 0x31000000
852 #define BR 0x32000000
853 #define BRSL 0x33000000
854 #define NOP 0x40200000
855 #define LNOP 0x00200000
856 #define ILA 0x42000000
858 /* Return true for all relative and absolute branch instructions.
866 brhnz 00100011 0.. */
869 is_branch (const unsigned char *insn)
871 return (insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0;
874 /* Return true for all indirect branch instructions.
882 bihnz 00100101 011 */
885 is_indirect_branch (const unsigned char *insn)
887 return (insn[0] & 0xef) == 0x25 && (insn[1] & 0x80) == 0;
890 /* Return true for branch hint instructions.
895 is_hint (const unsigned char *insn)
897 return (insn[0] & 0xfc) == 0x10;
900 /* True if INPUT_SECTION might need overlay stubs. */
903 maybe_needs_stubs (asection *input_section)
905 /* No stubs for debug sections and suchlike. */
906 if ((input_section->flags & SEC_ALLOC) == 0)
909 /* No stubs for link-once sections that will be discarded. */
910 if (input_section->output_section == bfd_abs_section_ptr)
913 /* Don't create stubs for .eh_frame references. */
914 if (strcmp (input_section->name, ".eh_frame") == 0)
936 /* Return non-zero if this reloc symbol should go via an overlay stub.
937 Return 2 if the stub must be in non-overlay area. */
939 static enum _stub_type
940 needs_ovl_stub (struct elf_link_hash_entry *h,
941 Elf_Internal_Sym *sym,
943 asection *input_section,
944 Elf_Internal_Rela *irela,
946 struct bfd_link_info *info)
948 struct spu_link_hash_table *htab = spu_hash_table (info);
949 enum elf_spu_reloc_type r_type;
950 unsigned int sym_type;
951 bfd_boolean branch, hint, call;
952 enum _stub_type ret = no_stub;
956 || sym_sec->output_section == bfd_abs_section_ptr
957 || spu_elf_section_data (sym_sec->output_section) == NULL)
962 /* Ensure no stubs for user supplied overlay manager syms. */
963 if (h == htab->ovly_entry[0] || h == htab->ovly_entry[1])
966 /* setjmp always goes via an overlay stub, because then the return
967 and hence the longjmp goes via __ovly_return. That magically
968 makes setjmp/longjmp between overlays work. */
969 if (strncmp (h->root.root.string, "setjmp", 6) == 0
970 && (h->root.root.string[6] == '\0' || h->root.root.string[6] == '@'))
977 sym_type = ELF_ST_TYPE (sym->st_info);
979 r_type = ELF32_R_TYPE (irela->r_info);
983 if (r_type == R_SPU_REL16 || r_type == R_SPU_ADDR16)
985 if (contents == NULL)
988 if (!bfd_get_section_contents (input_section->owner,
995 contents += irela->r_offset;
997 branch = is_branch (contents);
998 hint = is_hint (contents);
1001 call = (contents[0] & 0xfd) == 0x31;
1003 && sym_type != STT_FUNC
1004 && contents != insn)
1006 /* It's common for people to write assembly and forget
1007 to give function symbols the right type. Handle
1008 calls to such symbols, but warn so that (hopefully)
1009 people will fix their code. We need the symbol
1010 type to be correct to distinguish function pointer
1011 initialisation from other pointer initialisations. */
1012 const char *sym_name;
1015 sym_name = h->root.root.string;
1018 Elf_Internal_Shdr *symtab_hdr;
1019 symtab_hdr = &elf_tdata (input_section->owner)->symtab_hdr;
1020 sym_name = bfd_elf_sym_name (input_section->owner,
1026 /* xgettext:c-format */
1027 (_("warning: call to non-function symbol %s defined in %pB"),
1028 sym_name, sym_sec->owner);
1034 if ((!branch && htab->params->ovly_flavour == ovly_soft_icache)
1035 || (sym_type != STT_FUNC
1036 && !(branch || hint)
1037 && (sym_sec->flags & SEC_CODE) == 0))
1040 /* Usually, symbols in non-overlay sections don't need stubs. */
1041 if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0
1042 && !htab->params->non_overlay_stubs)
1045 /* A reference from some other section to a symbol in an overlay
1046 section needs a stub. */
1047 if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index
1048 != spu_elf_section_data (input_section->output_section)->u.o.ovl_index)
1050 unsigned int lrlive = 0;
1052 lrlive = (contents[1] & 0x70) >> 4;
1054 if (!lrlive && (call || sym_type == STT_FUNC))
1055 ret = call_ovl_stub;
1057 ret = br000_ovl_stub + lrlive;
1060 /* If this insn isn't a branch then we are possibly taking the
1061 address of a function and passing it out somehow. Soft-icache code
1062 always generates inline code to do indirect branches. */
1063 if (!(branch || hint)
1064 && sym_type == STT_FUNC
1065 && htab->params->ovly_flavour != ovly_soft_icache)
1072 count_stub (struct spu_link_hash_table *htab,
1075 enum _stub_type stub_type,
1076 struct elf_link_hash_entry *h,
1077 const Elf_Internal_Rela *irela)
1079 unsigned int ovl = 0;
1080 struct got_entry *g, **head;
1083 /* If this instruction is a branch or call, we need a stub
1084 for it. One stub per function per overlay.
1085 If it isn't a branch, then we are taking the address of
1086 this function so need a stub in the non-overlay area
1087 for it. One stub per function. */
1088 if (stub_type != nonovl_stub)
1089 ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
1092 head = &h->got.glist;
1095 if (elf_local_got_ents (ibfd) == NULL)
1097 bfd_size_type amt = (elf_tdata (ibfd)->symtab_hdr.sh_info
1098 * sizeof (*elf_local_got_ents (ibfd)));
1099 elf_local_got_ents (ibfd) = bfd_zmalloc (amt);
1100 if (elf_local_got_ents (ibfd) == NULL)
1103 head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
1106 if (htab->params->ovly_flavour == ovly_soft_icache)
1108 htab->stub_count[ovl] += 1;
1114 addend = irela->r_addend;
1118 struct got_entry *gnext;
1120 for (g = *head; g != NULL; g = g->next)
1121 if (g->addend == addend && g->ovl == 0)
1126 /* Need a new non-overlay area stub. Zap other stubs. */
1127 for (g = *head; g != NULL; g = gnext)
1130 if (g->addend == addend)
1132 htab->stub_count[g->ovl] -= 1;
1140 for (g = *head; g != NULL; g = g->next)
1141 if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
1147 g = bfd_malloc (sizeof *g);
1152 g->stub_addr = (bfd_vma) -1;
1156 htab->stub_count[ovl] += 1;
1162 /* Support two sizes of overlay stubs, a slower more compact stub of two
1163 instructions, and a faster stub of four instructions.
1164 Soft-icache stubs are four or eight words. */
1167 ovl_stub_size (struct spu_elf_params *params)
1169 return 16 << params->ovly_flavour >> params->compact_stub;
1173 ovl_stub_size_log2 (struct spu_elf_params *params)
1175 return 4 + params->ovly_flavour - params->compact_stub;
1178 /* Two instruction overlay stubs look like:
1180 brsl $75,__ovly_load
1181 .word target_ovl_and_address
1183 ovl_and_address is a word with the overlay number in the top 14 bits
1184 and local store address in the bottom 18 bits.
1186 Four instruction overlay stubs look like:
1190 ila $79,target_address
1193 Software icache stubs are:
1197 .word lrlive_branchlocalstoreaddr;
1198 brasl $75,__icache_br_handler
1203 build_stub (struct bfd_link_info *info,
1206 enum _stub_type stub_type,
1207 struct elf_link_hash_entry *h,
1208 const Elf_Internal_Rela *irela,
1212 struct spu_link_hash_table *htab = spu_hash_table (info);
1213 unsigned int ovl, dest_ovl, set_id;
1214 struct got_entry *g, **head;
1216 bfd_vma addend, from, to, br_dest, patt;
1217 unsigned int lrlive;
1220 if (stub_type != nonovl_stub)
1221 ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
1224 head = &h->got.glist;
1226 head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
1230 addend = irela->r_addend;
1232 if (htab->params->ovly_flavour == ovly_soft_icache)
1234 g = bfd_malloc (sizeof *g);
1240 g->br_addr = (irela->r_offset
1241 + isec->output_offset
1242 + isec->output_section->vma);
1248 for (g = *head; g != NULL; g = g->next)
1249 if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
1254 if (g->ovl == 0 && ovl != 0)
1257 if (g->stub_addr != (bfd_vma) -1)
1261 sec = htab->stub_sec[ovl];
1262 dest += dest_sec->output_offset + dest_sec->output_section->vma;
1263 from = sec->size + sec->output_offset + sec->output_section->vma;
1264 g->stub_addr = from;
1265 to = (htab->ovly_entry[0]->root.u.def.value
1266 + htab->ovly_entry[0]->root.u.def.section->output_offset
1267 + htab->ovly_entry[0]->root.u.def.section->output_section->vma);
1269 if (((dest | to | from) & 3) != 0)
1274 dest_ovl = spu_elf_section_data (dest_sec->output_section)->u.o.ovl_index;
1276 if (htab->params->ovly_flavour == ovly_normal
1277 && !htab->params->compact_stub)
1279 bfd_put_32 (sec->owner, ILA + ((dest_ovl << 7) & 0x01ffff80) + 78,
1280 sec->contents + sec->size);
1281 bfd_put_32 (sec->owner, LNOP,
1282 sec->contents + sec->size + 4);
1283 bfd_put_32 (sec->owner, ILA + ((dest << 7) & 0x01ffff80) + 79,
1284 sec->contents + sec->size + 8);
1286 bfd_put_32 (sec->owner, BR + (((to - (from + 12)) << 5) & 0x007fff80),
1287 sec->contents + sec->size + 12);
1289 bfd_put_32 (sec->owner, BRA + ((to << 5) & 0x007fff80),
1290 sec->contents + sec->size + 12);
1292 else if (htab->params->ovly_flavour == ovly_normal
1293 && htab->params->compact_stub)
1296 bfd_put_32 (sec->owner, BRSL + (((to - from) << 5) & 0x007fff80) + 75,
1297 sec->contents + sec->size);
1299 bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
1300 sec->contents + sec->size);
1301 bfd_put_32 (sec->owner, (dest & 0x3ffff) | (dest_ovl << 18),
1302 sec->contents + sec->size + 4);
1304 else if (htab->params->ovly_flavour == ovly_soft_icache
1305 && htab->params->compact_stub)
1308 if (stub_type == nonovl_stub)
1310 else if (stub_type == call_ovl_stub)
1311 /* A brsl makes lr live and *(*sp+16) is live.
1312 Tail calls have the same liveness. */
1314 else if (!htab->params->lrlive_analysis)
1315 /* Assume stack frame and lr save. */
1317 else if (irela != NULL)
1319 /* Analyse branch instructions. */
1320 struct function_info *caller;
1323 caller = find_function (isec, irela->r_offset, info);
1324 if (caller->start == NULL)
1325 off = irela->r_offset;
1328 struct function_info *found = NULL;
1330 /* Find the earliest piece of this function that
1331 has frame adjusting instructions. We might
1332 see dynamic frame adjustment (eg. for alloca)
1333 in some later piece, but functions using
1334 alloca always set up a frame earlier. Frame
1335 setup instructions are always in one piece. */
1336 if (caller->lr_store != (bfd_vma) -1
1337 || caller->sp_adjust != (bfd_vma) -1)
1339 while (caller->start != NULL)
1341 caller = caller->start;
1342 if (caller->lr_store != (bfd_vma) -1
1343 || caller->sp_adjust != (bfd_vma) -1)
1351 if (off > caller->sp_adjust)
1353 if (off > caller->lr_store)
1354 /* Only *(*sp+16) is live. */
1357 /* If no lr save, then we must be in a
1358 leaf function with a frame.
1359 lr is still live. */
1362 else if (off > caller->lr_store)
1364 /* Between lr save and stack adjust. */
1366 /* This should never happen since prologues won't
1371 /* On entry to function. */
1374 if (stub_type != br000_ovl_stub
1375 && lrlive != stub_type - br000_ovl_stub)
1376 /* xgettext:c-format */
1377 info->callbacks->einfo (_("%pA:0x%v lrlive .brinfo (%u) differs "
1378 "from analysis (%u)\n"),
1379 isec, irela->r_offset, lrlive,
1380 stub_type - br000_ovl_stub);
1383 /* If given lrlive info via .brinfo, use it. */
1384 if (stub_type > br000_ovl_stub)
1385 lrlive = stub_type - br000_ovl_stub;
1388 to = (htab->ovly_entry[1]->root.u.def.value
1389 + htab->ovly_entry[1]->root.u.def.section->output_offset
1390 + htab->ovly_entry[1]->root.u.def.section->output_section->vma);
1392 /* The branch that uses this stub goes to stub_addr + 4. We'll
1393 set up an xor pattern that can be used by the icache manager
1394 to modify this branch to go directly to its destination. */
1396 br_dest = g->stub_addr;
1399 /* Except in the case of _SPUEAR_ stubs, the branch in
1400 question is the one in the stub itself. */
1401 BFD_ASSERT (stub_type == nonovl_stub);
1402 g->br_addr = g->stub_addr;
1406 set_id = ((dest_ovl - 1) >> htab->num_lines_log2) + 1;
1407 bfd_put_32 (sec->owner, (set_id << 18) | (dest & 0x3ffff),
1408 sec->contents + sec->size);
1409 bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
1410 sec->contents + sec->size + 4);
1411 bfd_put_32 (sec->owner, (lrlive << 29) | (g->br_addr & 0x3ffff),
1412 sec->contents + sec->size + 8);
1413 patt = dest ^ br_dest;
1414 if (irela != NULL && ELF32_R_TYPE (irela->r_info) == R_SPU_REL16)
1415 patt = (dest - g->br_addr) ^ (br_dest - g->br_addr);
1416 bfd_put_32 (sec->owner, (patt << 5) & 0x007fff80,
1417 sec->contents + sec->size + 12);
1420 /* Extra space for linked list entries. */
1426 sec->size += ovl_stub_size (htab->params);
1428 if (htab->params->emit_stub_syms)
1434 len = 8 + sizeof (".ovl_call.") - 1;
1436 len += strlen (h->root.root.string);
1441 add = (int) irela->r_addend & 0xffffffff;
1444 name = bfd_malloc (len + 1);
1448 sprintf (name, "%08x.ovl_call.", g->ovl);
1450 strcpy (name + 8 + sizeof (".ovl_call.") - 1, h->root.root.string);
1452 sprintf (name + 8 + sizeof (".ovl_call.") - 1, "%x:%x",
1453 dest_sec->id & 0xffffffff,
1454 (int) ELF32_R_SYM (irela->r_info) & 0xffffffff);
1456 sprintf (name + len - 9, "+%x", add);
1458 h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE);
1462 if (h->root.type == bfd_link_hash_new)
1464 h->root.type = bfd_link_hash_defined;
1465 h->root.u.def.section = sec;
1466 h->size = ovl_stub_size (htab->params);
1467 h->root.u.def.value = sec->size - h->size;
1471 h->ref_regular_nonweak = 1;
1472 h->forced_local = 1;
1480 /* Called via elf_link_hash_traverse to allocate stubs for any _SPUEAR_
1484 allocate_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
1486 /* Symbols starting with _SPUEAR_ need a stub because they may be
1487 invoked by the PPU. */
1488 struct bfd_link_info *info = inf;
1489 struct spu_link_hash_table *htab = spu_hash_table (info);
1492 if ((h->root.type == bfd_link_hash_defined
1493 || h->root.type == bfd_link_hash_defweak)
1495 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0
1496 && (sym_sec = h->root.u.def.section) != NULL
1497 && sym_sec->output_section != bfd_abs_section_ptr
1498 && spu_elf_section_data (sym_sec->output_section) != NULL
1499 && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
1500 || htab->params->non_overlay_stubs))
1502 return count_stub (htab, NULL, NULL, nonovl_stub, h, NULL);
1509 build_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
1511 /* Symbols starting with _SPUEAR_ need a stub because they may be
1512 invoked by the PPU. */
1513 struct bfd_link_info *info = inf;
1514 struct spu_link_hash_table *htab = spu_hash_table (info);
1517 if ((h->root.type == bfd_link_hash_defined
1518 || h->root.type == bfd_link_hash_defweak)
1520 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0
1521 && (sym_sec = h->root.u.def.section) != NULL
1522 && sym_sec->output_section != bfd_abs_section_ptr
1523 && spu_elf_section_data (sym_sec->output_section) != NULL
1524 && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
1525 || htab->params->non_overlay_stubs))
1527 return build_stub (info, NULL, NULL, nonovl_stub, h, NULL,
1528 h->root.u.def.value, sym_sec);
1534 /* Size or build stubs. */
1537 process_stubs (struct bfd_link_info *info, bfd_boolean build)
1539 struct spu_link_hash_table *htab = spu_hash_table (info);
1542 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1544 extern const bfd_target spu_elf32_vec;
1545 Elf_Internal_Shdr *symtab_hdr;
1547 Elf_Internal_Sym *local_syms = NULL;
1549 if (ibfd->xvec != &spu_elf32_vec)
1552 /* We'll need the symbol table in a second. */
1553 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1554 if (symtab_hdr->sh_info == 0)
1557 /* Walk over each section attached to the input bfd. */
1558 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
1560 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
1562 /* If there aren't any relocs, then there's nothing more to do. */
1563 if ((isec->flags & SEC_RELOC) == 0
1564 || isec->reloc_count == 0)
1567 if (!maybe_needs_stubs (isec))
1570 /* Get the relocs. */
1571 internal_relocs = _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
1573 if (internal_relocs == NULL)
1574 goto error_ret_free_local;
1576 /* Now examine each relocation. */
1577 irela = internal_relocs;
1578 irelaend = irela + isec->reloc_count;
1579 for (; irela < irelaend; irela++)
1581 enum elf_spu_reloc_type r_type;
1582 unsigned int r_indx;
1584 Elf_Internal_Sym *sym;
1585 struct elf_link_hash_entry *h;
1586 enum _stub_type stub_type;
1588 r_type = ELF32_R_TYPE (irela->r_info);
1589 r_indx = ELF32_R_SYM (irela->r_info);
1591 if (r_type >= R_SPU_max)
1593 bfd_set_error (bfd_error_bad_value);
1594 error_ret_free_internal:
1595 if (elf_section_data (isec)->relocs != internal_relocs)
1596 free (internal_relocs);
1597 error_ret_free_local:
1598 if (local_syms != NULL
1599 && (symtab_hdr->contents
1600 != (unsigned char *) local_syms))
1605 /* Determine the reloc target section. */
1606 if (!get_sym_h (&h, &sym, &sym_sec, &local_syms, r_indx, ibfd))
1607 goto error_ret_free_internal;
1609 stub_type = needs_ovl_stub (h, sym, sym_sec, isec, irela,
1611 if (stub_type == no_stub)
1613 else if (stub_type == stub_error)
1614 goto error_ret_free_internal;
1616 if (htab->stub_count == NULL)
1619 amt = (htab->num_overlays + 1) * sizeof (*htab->stub_count);
1620 htab->stub_count = bfd_zmalloc (amt);
1621 if (htab->stub_count == NULL)
1622 goto error_ret_free_internal;
1627 if (!count_stub (htab, ibfd, isec, stub_type, h, irela))
1628 goto error_ret_free_internal;
1635 dest = h->root.u.def.value;
1637 dest = sym->st_value;
1638 dest += irela->r_addend;
1639 if (!build_stub (info, ibfd, isec, stub_type, h, irela,
1641 goto error_ret_free_internal;
1645 /* We're done with the internal relocs, free them. */
1646 if (elf_section_data (isec)->relocs != internal_relocs)
1647 free (internal_relocs);
1650 if (local_syms != NULL
1651 && symtab_hdr->contents != (unsigned char *) local_syms)
1653 if (!info->keep_memory)
1656 symtab_hdr->contents = (unsigned char *) local_syms;
1663 /* Allocate space for overlay call and return stubs.
1664 Return 0 on error, 1 if no overlays, 2 otherwise. */
1667 spu_elf_size_stubs (struct bfd_link_info *info)
1669 struct spu_link_hash_table *htab;
1676 if (!process_stubs (info, FALSE))
1679 htab = spu_hash_table (info);
1680 elf_link_hash_traverse (&htab->elf, allocate_spuear_stubs, info);
1684 ibfd = info->input_bfds;
1685 if (htab->stub_count != NULL)
1687 amt = (htab->num_overlays + 1) * sizeof (*htab->stub_sec);
1688 htab->stub_sec = bfd_zmalloc (amt);
1689 if (htab->stub_sec == NULL)
1692 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
1693 | SEC_HAS_CONTENTS | SEC_IN_MEMORY);
1694 stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
1695 htab->stub_sec[0] = stub;
1697 || !bfd_set_section_alignment (ibfd, stub,
1698 ovl_stub_size_log2 (htab->params)))
1700 stub->size = htab->stub_count[0] * ovl_stub_size (htab->params);
1701 if (htab->params->ovly_flavour == ovly_soft_icache)
1702 /* Extra space for linked list entries. */
1703 stub->size += htab->stub_count[0] * 16;
1705 for (i = 0; i < htab->num_overlays; ++i)
1707 asection *osec = htab->ovl_sec[i];
1708 unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
1709 stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
1710 htab->stub_sec[ovl] = stub;
1712 || !bfd_set_section_alignment (ibfd, stub,
1713 ovl_stub_size_log2 (htab->params)))
1715 stub->size = htab->stub_count[ovl] * ovl_stub_size (htab->params);
1719 if (htab->params->ovly_flavour == ovly_soft_icache)
1721 /* Space for icache manager tables.
1722 a) Tag array, one quadword per cache line.
1723 b) Rewrite "to" list, one quadword per cache line.
1724 c) Rewrite "from" list, one byte per outgoing branch (rounded up to
1725 a power-of-two number of full quadwords) per cache line. */
1728 htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
1729 if (htab->ovtab == NULL
1730 || !bfd_set_section_alignment (ibfd, htab->ovtab, 4))
1733 htab->ovtab->size = (16 + 16 + (16 << htab->fromelem_size_log2))
1734 << htab->num_lines_log2;
1736 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1737 htab->init = bfd_make_section_anyway_with_flags (ibfd, ".ovini", flags);
1738 if (htab->init == NULL
1739 || !bfd_set_section_alignment (ibfd, htab->init, 4))
1742 htab->init->size = 16;
1744 else if (htab->stub_count == NULL)
1748 /* htab->ovtab consists of two arrays.
1758 . } _ovly_buf_table[];
1761 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1762 htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
1763 if (htab->ovtab == NULL
1764 || !bfd_set_section_alignment (ibfd, htab->ovtab, 4))
1767 htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
1770 htab->toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC);
1771 if (htab->toe == NULL
1772 || !bfd_set_section_alignment (ibfd, htab->toe, 4))
1774 htab->toe->size = 16;
1779 /* Called from ld to place overlay manager data sections. This is done
1780 after the overlay manager itself is loaded, mainly so that the
1781 linker's htab->init section is placed after any other .ovl.init
1785 spu_elf_place_overlay_data (struct bfd_link_info *info)
1787 struct spu_link_hash_table *htab = spu_hash_table (info);
1790 if (htab->stub_sec != NULL)
1792 (*htab->params->place_spu_section) (htab->stub_sec[0], NULL, ".text");
1794 for (i = 0; i < htab->num_overlays; ++i)
1796 asection *osec = htab->ovl_sec[i];
1797 unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
1798 (*htab->params->place_spu_section) (htab->stub_sec[ovl], osec, NULL);
1802 if (htab->params->ovly_flavour == ovly_soft_icache)
1803 (*htab->params->place_spu_section) (htab->init, NULL, ".ovl.init");
1805 if (htab->ovtab != NULL)
1807 const char *ovout = ".data";
1808 if (htab->params->ovly_flavour == ovly_soft_icache)
1810 (*htab->params->place_spu_section) (htab->ovtab, NULL, ovout);
1813 if (htab->toe != NULL)
1814 (*htab->params->place_spu_section) (htab->toe, NULL, ".toe");
1817 /* Functions to handle embedded spu_ovl.o object. */
1820 ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream)
1826 ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED,
1832 struct _ovl_stream *os;
1836 os = (struct _ovl_stream *) stream;
1837 max = (const char *) os->end - (const char *) os->start;
1839 if ((ufile_ptr) offset >= max)
1843 if (count > max - offset)
1844 count = max - offset;
1846 memcpy (buf, (const char *) os->start + offset, count);
1851 ovl_mgr_stat (struct bfd *abfd ATTRIBUTE_UNUSED,
1855 struct _ovl_stream *os = (struct _ovl_stream *) stream;
1857 memset (sb, 0, sizeof (*sb));
1858 sb->st_size = (const char *) os->end - (const char *) os->start;
1863 spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream)
1865 *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr",
1872 return *ovl_bfd != NULL;
1876 overlay_index (asection *sec)
1879 || sec->output_section == bfd_abs_section_ptr)
1881 return spu_elf_section_data (sec->output_section)->u.o.ovl_index;
1884 /* Define an STT_OBJECT symbol. */
1886 static struct elf_link_hash_entry *
1887 define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name)
1889 struct elf_link_hash_entry *h;
1891 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
1895 if (h->root.type != bfd_link_hash_defined
1898 h->root.type = bfd_link_hash_defined;
1899 h->root.u.def.section = htab->ovtab;
1900 h->type = STT_OBJECT;
1903 h->ref_regular_nonweak = 1;
1906 else if (h->root.u.def.section->owner != NULL)
1908 /* xgettext:c-format */
1909 _bfd_error_handler (_("%pB is not allowed to define %s"),
1910 h->root.u.def.section->owner,
1911 h->root.root.string);
1912 bfd_set_error (bfd_error_bad_value);
1917 _bfd_error_handler (_("you are not allowed to define %s in a script"),
1918 h->root.root.string);
1919 bfd_set_error (bfd_error_bad_value);
1926 /* Fill in all stubs and the overlay tables. */
1929 spu_elf_build_stubs (struct bfd_link_info *info)
1931 struct spu_link_hash_table *htab = spu_hash_table (info);
1932 struct elf_link_hash_entry *h;
1938 if (htab->num_overlays != 0)
1940 for (i = 0; i < 2; i++)
1942 h = htab->ovly_entry[i];
1944 && (h->root.type == bfd_link_hash_defined
1945 || h->root.type == bfd_link_hash_defweak)
1948 s = h->root.u.def.section->output_section;
1949 if (spu_elf_section_data (s)->u.o.ovl_index)
1951 _bfd_error_handler (_("%s in overlay section"),
1952 h->root.root.string);
1953 bfd_set_error (bfd_error_bad_value);
1960 if (htab->stub_sec != NULL)
1962 for (i = 0; i <= htab->num_overlays; i++)
1963 if (htab->stub_sec[i]->size != 0)
1965 htab->stub_sec[i]->contents = bfd_zalloc (htab->stub_sec[i]->owner,
1966 htab->stub_sec[i]->size);
1967 if (htab->stub_sec[i]->contents == NULL)
1969 htab->stub_sec[i]->rawsize = htab->stub_sec[i]->size;
1970 htab->stub_sec[i]->size = 0;
1973 /* Fill in all the stubs. */
1974 process_stubs (info, TRUE);
1975 if (!htab->stub_err)
1976 elf_link_hash_traverse (&htab->elf, build_spuear_stubs, info);
1980 _bfd_error_handler (_("overlay stub relocation overflow"));
1981 bfd_set_error (bfd_error_bad_value);
1985 for (i = 0; i <= htab->num_overlays; i++)
1987 if (htab->stub_sec[i]->size != htab->stub_sec[i]->rawsize)
1989 _bfd_error_handler (_("stubs don't match calculated size"));
1990 bfd_set_error (bfd_error_bad_value);
1993 htab->stub_sec[i]->rawsize = 0;
1997 if (htab->ovtab == NULL || htab->ovtab->size == 0)
2000 htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size);
2001 if (htab->ovtab->contents == NULL)
2004 p = htab->ovtab->contents;
2005 if (htab->params->ovly_flavour == ovly_soft_icache)
2009 h = define_ovtab_symbol (htab, "__icache_tag_array");
2012 h->root.u.def.value = 0;
2013 h->size = 16 << htab->num_lines_log2;
2016 h = define_ovtab_symbol (htab, "__icache_tag_array_size");
2019 h->root.u.def.value = 16 << htab->num_lines_log2;
2020 h->root.u.def.section = bfd_abs_section_ptr;
2022 h = define_ovtab_symbol (htab, "__icache_rewrite_to");
2025 h->root.u.def.value = off;
2026 h->size = 16 << htab->num_lines_log2;
2029 h = define_ovtab_symbol (htab, "__icache_rewrite_to_size");
2032 h->root.u.def.value = 16 << htab->num_lines_log2;
2033 h->root.u.def.section = bfd_abs_section_ptr;
2035 h = define_ovtab_symbol (htab, "__icache_rewrite_from");
2038 h->root.u.def.value = off;
2039 h->size = 16 << (htab->fromelem_size_log2 + htab->num_lines_log2);
2042 h = define_ovtab_symbol (htab, "__icache_rewrite_from_size");
2045 h->root.u.def.value = 16 << (htab->fromelem_size_log2
2046 + htab->num_lines_log2);
2047 h->root.u.def.section = bfd_abs_section_ptr;
2049 h = define_ovtab_symbol (htab, "__icache_log2_fromelemsize");
2052 h->root.u.def.value = htab->fromelem_size_log2;
2053 h->root.u.def.section = bfd_abs_section_ptr;
2055 h = define_ovtab_symbol (htab, "__icache_base");
2058 h->root.u.def.value = htab->ovl_sec[0]->vma;
2059 h->root.u.def.section = bfd_abs_section_ptr;
2060 h->size = htab->num_buf << htab->line_size_log2;
2062 h = define_ovtab_symbol (htab, "__icache_linesize");
2065 h->root.u.def.value = 1 << htab->line_size_log2;
2066 h->root.u.def.section = bfd_abs_section_ptr;
2068 h = define_ovtab_symbol (htab, "__icache_log2_linesize");
2071 h->root.u.def.value = htab->line_size_log2;
2072 h->root.u.def.section = bfd_abs_section_ptr;
2074 h = define_ovtab_symbol (htab, "__icache_neg_log2_linesize");
2077 h->root.u.def.value = -htab->line_size_log2;
2078 h->root.u.def.section = bfd_abs_section_ptr;
2080 h = define_ovtab_symbol (htab, "__icache_cachesize");
2083 h->root.u.def.value = 1 << (htab->num_lines_log2 + htab->line_size_log2);
2084 h->root.u.def.section = bfd_abs_section_ptr;
2086 h = define_ovtab_symbol (htab, "__icache_log2_cachesize");
2089 h->root.u.def.value = htab->num_lines_log2 + htab->line_size_log2;
2090 h->root.u.def.section = bfd_abs_section_ptr;
2092 h = define_ovtab_symbol (htab, "__icache_neg_log2_cachesize");
2095 h->root.u.def.value = -(htab->num_lines_log2 + htab->line_size_log2);
2096 h->root.u.def.section = bfd_abs_section_ptr;
2098 if (htab->init != NULL && htab->init->size != 0)
2100 htab->init->contents = bfd_zalloc (htab->init->owner,
2102 if (htab->init->contents == NULL)
2105 h = define_ovtab_symbol (htab, "__icache_fileoff");
2108 h->root.u.def.value = 0;
2109 h->root.u.def.section = htab->init;
2115 /* Write out _ovly_table. */
2116 /* set low bit of .size to mark non-overlay area as present. */
2118 obfd = htab->ovtab->output_section->owner;
2119 for (s = obfd->sections; s != NULL; s = s->next)
2121 unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index;
2125 unsigned long off = ovl_index * 16;
2126 unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf;
2128 bfd_put_32 (htab->ovtab->owner, s->vma, p + off);
2129 bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16,
2131 /* file_off written later in spu_elf_modify_program_headers. */
2132 bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12);
2136 h = define_ovtab_symbol (htab, "_ovly_table");
2139 h->root.u.def.value = 16;
2140 h->size = htab->num_overlays * 16;
2142 h = define_ovtab_symbol (htab, "_ovly_table_end");
2145 h->root.u.def.value = htab->num_overlays * 16 + 16;
2148 h = define_ovtab_symbol (htab, "_ovly_buf_table");
2151 h->root.u.def.value = htab->num_overlays * 16 + 16;
2152 h->size = htab->num_buf * 4;
2154 h = define_ovtab_symbol (htab, "_ovly_buf_table_end");
2157 h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
2161 h = define_ovtab_symbol (htab, "_EAR_");
2164 h->root.u.def.section = htab->toe;
2165 h->root.u.def.value = 0;
2171 /* Check that all loadable section VMAs lie in the range
2172 LO .. HI inclusive, and stash some parameters for --auto-overlay. */
2175 spu_elf_check_vma (struct bfd_link_info *info)
2177 struct elf_segment_map *m;
2179 struct spu_link_hash_table *htab = spu_hash_table (info);
2180 bfd *abfd = info->output_bfd;
2181 bfd_vma hi = htab->params->local_store_hi;
2182 bfd_vma lo = htab->params->local_store_lo;
2184 htab->local_store = hi + 1 - lo;
2186 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2187 if (m->p_type == PT_LOAD)
2188 for (i = 0; i < m->count; i++)
2189 if (m->sections[i]->size != 0
2190 && (m->sections[i]->vma < lo
2191 || m->sections[i]->vma > hi
2192 || m->sections[i]->vma + m->sections[i]->size - 1 > hi))
2193 return m->sections[i];
2198 /* OFFSET in SEC (presumably) is the beginning of a function prologue.
2199 Search for stack adjusting insns, and return the sp delta.
2200 If a store of lr is found save the instruction offset to *LR_STORE.
2201 If a stack adjusting instruction is found, save that offset to
2205 find_function_stack_adjust (asection *sec,
2212 memset (reg, 0, sizeof (reg));
2213 for ( ; offset + 4 <= sec->size; offset += 4)
2215 unsigned char buf[4];
2219 /* Assume no relocs on stack adjusing insns. */
2220 if (!bfd_get_section_contents (sec->owner, sec, buf, offset, 4))
2224 ra = ((buf[2] & 0x3f) << 1) | (buf[3] >> 7);
2226 if (buf[0] == 0x24 /* stqd */)
2228 if (rt == 0 /* lr */ && ra == 1 /* sp */)
2233 /* Partly decoded immediate field. */
2234 imm = (buf[1] << 9) | (buf[2] << 1) | (buf[3] >> 7);
2236 if (buf[0] == 0x1c /* ai */)
2239 imm = (imm ^ 0x200) - 0x200;
2240 reg[rt] = reg[ra] + imm;
2242 if (rt == 1 /* sp */)
2246 *sp_adjust = offset;
2250 else if (buf[0] == 0x18 && (buf[1] & 0xe0) == 0 /* a */)
2252 int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
2254 reg[rt] = reg[ra] + reg[rb];
2259 *sp_adjust = offset;
2263 else if (buf[0] == 0x08 && (buf[1] & 0xe0) == 0 /* sf */)
2265 int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
2267 reg[rt] = reg[rb] - reg[ra];
2272 *sp_adjust = offset;
2276 else if ((buf[0] & 0xfc) == 0x40 /* il, ilh, ilhu, ila */)
2278 if (buf[0] >= 0x42 /* ila */)
2279 imm |= (buf[0] & 1) << 17;
2284 if (buf[0] == 0x40 /* il */)
2286 if ((buf[1] & 0x80) == 0)
2288 imm = (imm ^ 0x8000) - 0x8000;
2290 else if ((buf[1] & 0x80) == 0 /* ilhu */)
2296 else if (buf[0] == 0x60 && (buf[1] & 0x80) != 0 /* iohl */)
2298 reg[rt] |= imm & 0xffff;
2301 else if (buf[0] == 0x04 /* ori */)
2304 imm = (imm ^ 0x200) - 0x200;
2305 reg[rt] = reg[ra] | imm;
2308 else if (buf[0] == 0x32 && (buf[1] & 0x80) != 0 /* fsmbi */)
2310 reg[rt] = ( ((imm & 0x8000) ? 0xff000000 : 0)
2311 | ((imm & 0x4000) ? 0x00ff0000 : 0)
2312 | ((imm & 0x2000) ? 0x0000ff00 : 0)
2313 | ((imm & 0x1000) ? 0x000000ff : 0));
2316 else if (buf[0] == 0x16 /* andbi */)
2322 reg[rt] = reg[ra] & imm;
2325 else if (buf[0] == 0x33 && imm == 1 /* brsl .+4 */)
2327 /* Used in pic reg load. Say rt is trashed. Won't be used
2328 in stack adjust, but we need to continue past this branch. */
2332 else if (is_branch (buf) || is_indirect_branch (buf))
2333 /* If we hit a branch then we must be out of the prologue. */
2340 /* qsort predicate to sort symbols by section and value. */
2342 static Elf_Internal_Sym *sort_syms_syms;
2343 static asection **sort_syms_psecs;
2346 sort_syms (const void *a, const void *b)
2348 Elf_Internal_Sym *const *s1 = a;
2349 Elf_Internal_Sym *const *s2 = b;
2350 asection *sec1,*sec2;
2351 bfd_signed_vma delta;
2353 sec1 = sort_syms_psecs[*s1 - sort_syms_syms];
2354 sec2 = sort_syms_psecs[*s2 - sort_syms_syms];
2357 return sec1->index - sec2->index;
2359 delta = (*s1)->st_value - (*s2)->st_value;
2361 return delta < 0 ? -1 : 1;
2363 delta = (*s2)->st_size - (*s1)->st_size;
2365 return delta < 0 ? -1 : 1;
2367 return *s1 < *s2 ? -1 : 1;
2370 /* Allocate a struct spu_elf_stack_info with MAX_FUN struct function_info
2371 entries for section SEC. */
2373 static struct spu_elf_stack_info *
2374 alloc_stack_info (asection *sec, int max_fun)
2376 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2379 amt = sizeof (struct spu_elf_stack_info);
2380 amt += (max_fun - 1) * sizeof (struct function_info);
2381 sec_data->u.i.stack_info = bfd_zmalloc (amt);
2382 if (sec_data->u.i.stack_info != NULL)
2383 sec_data->u.i.stack_info->max_fun = max_fun;
2384 return sec_data->u.i.stack_info;
2387 /* Add a new struct function_info describing a (part of a) function
2388 starting at SYM_H. Keep the array sorted by address. */
2390 static struct function_info *
2391 maybe_insert_function (asection *sec,
2394 bfd_boolean is_func)
2396 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2397 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2403 sinfo = alloc_stack_info (sec, 20);
2410 Elf_Internal_Sym *sym = sym_h;
2411 off = sym->st_value;
2412 size = sym->st_size;
2416 struct elf_link_hash_entry *h = sym_h;
2417 off = h->root.u.def.value;
2421 for (i = sinfo->num_fun; --i >= 0; )
2422 if (sinfo->fun[i].lo <= off)
2427 /* Don't add another entry for an alias, but do update some
2429 if (sinfo->fun[i].lo == off)
2431 /* Prefer globals over local syms. */
2432 if (global && !sinfo->fun[i].global)
2434 sinfo->fun[i].global = TRUE;
2435 sinfo->fun[i].u.h = sym_h;
2438 sinfo->fun[i].is_func = TRUE;
2439 return &sinfo->fun[i];
2441 /* Ignore a zero-size symbol inside an existing function. */
2442 else if (sinfo->fun[i].hi > off && size == 0)
2443 return &sinfo->fun[i];
2446 if (sinfo->num_fun >= sinfo->max_fun)
2448 bfd_size_type amt = sizeof (struct spu_elf_stack_info);
2449 bfd_size_type old = amt;
2451 old += (sinfo->max_fun - 1) * sizeof (struct function_info);
2452 sinfo->max_fun += 20 + (sinfo->max_fun >> 1);
2453 amt += (sinfo->max_fun - 1) * sizeof (struct function_info);
2454 sinfo = bfd_realloc (sinfo, amt);
2457 memset ((char *) sinfo + old, 0, amt - old);
2458 sec_data->u.i.stack_info = sinfo;
2461 if (++i < sinfo->num_fun)
2462 memmove (&sinfo->fun[i + 1], &sinfo->fun[i],
2463 (sinfo->num_fun - i) * sizeof (sinfo->fun[i]));
2464 sinfo->fun[i].is_func = is_func;
2465 sinfo->fun[i].global = global;
2466 sinfo->fun[i].sec = sec;
2468 sinfo->fun[i].u.h = sym_h;
2470 sinfo->fun[i].u.sym = sym_h;
2471 sinfo->fun[i].lo = off;
2472 sinfo->fun[i].hi = off + size;
2473 sinfo->fun[i].lr_store = -1;
2474 sinfo->fun[i].sp_adjust = -1;
2475 sinfo->fun[i].stack = -find_function_stack_adjust (sec, off,
2476 &sinfo->fun[i].lr_store,
2477 &sinfo->fun[i].sp_adjust);
2478 sinfo->num_fun += 1;
2479 return &sinfo->fun[i];
2482 /* Return the name of FUN. */
2485 func_name (struct function_info *fun)
2489 Elf_Internal_Shdr *symtab_hdr;
2491 while (fun->start != NULL)
2495 return fun->u.h->root.root.string;
2498 if (fun->u.sym->st_name == 0)
2500 size_t len = strlen (sec->name);
2501 char *name = bfd_malloc (len + 10);
2504 sprintf (name, "%s+%lx", sec->name,
2505 (unsigned long) fun->u.sym->st_value & 0xffffffff);
2509 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2510 return bfd_elf_sym_name (ibfd, symtab_hdr, fun->u.sym, sec);
2513 /* Read the instruction at OFF in SEC. Return true iff the instruction
2514 is a nop, lnop, or stop 0 (all zero insn). */
2517 is_nop (asection *sec, bfd_vma off)
2519 unsigned char insn[4];
2521 if (off + 4 > sec->size
2522 || !bfd_get_section_contents (sec->owner, sec, insn, off, 4))
2524 if ((insn[0] & 0xbf) == 0 && (insn[1] & 0xe0) == 0x20)
2526 if (insn[0] == 0 && insn[1] == 0 && insn[2] == 0 && insn[3] == 0)
2531 /* Extend the range of FUN to cover nop padding up to LIMIT.
2532 Return TRUE iff some instruction other than a NOP was found. */
2535 insns_at_end (struct function_info *fun, bfd_vma limit)
2537 bfd_vma off = (fun->hi + 3) & -4;
2539 while (off < limit && is_nop (fun->sec, off))
2550 /* Check and fix overlapping function ranges. Return TRUE iff there
2551 are gaps in the current info we have about functions in SEC. */
2554 check_function_ranges (asection *sec, struct bfd_link_info *info)
2556 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2557 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2559 bfd_boolean gaps = FALSE;
2564 for (i = 1; i < sinfo->num_fun; i++)
2565 if (sinfo->fun[i - 1].hi > sinfo->fun[i].lo)
2567 /* Fix overlapping symbols. */
2568 const char *f1 = func_name (&sinfo->fun[i - 1]);
2569 const char *f2 = func_name (&sinfo->fun[i]);
2571 /* xgettext:c-format */
2572 info->callbacks->einfo (_("warning: %s overlaps %s\n"), f1, f2);
2573 sinfo->fun[i - 1].hi = sinfo->fun[i].lo;
2575 else if (insns_at_end (&sinfo->fun[i - 1], sinfo->fun[i].lo))
2578 if (sinfo->num_fun == 0)
2582 if (sinfo->fun[0].lo != 0)
2584 if (sinfo->fun[sinfo->num_fun - 1].hi > sec->size)
2586 const char *f1 = func_name (&sinfo->fun[sinfo->num_fun - 1]);
2588 info->callbacks->einfo (_("warning: %s exceeds section size\n"), f1);
2589 sinfo->fun[sinfo->num_fun - 1].hi = sec->size;
2591 else if (insns_at_end (&sinfo->fun[sinfo->num_fun - 1], sec->size))
2597 /* Search current function info for a function that contains address
2598 OFFSET in section SEC. */
2600 static struct function_info *
2601 find_function (asection *sec, bfd_vma offset, struct bfd_link_info *info)
2603 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2604 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2608 hi = sinfo->num_fun;
2611 mid = (lo + hi) / 2;
2612 if (offset < sinfo->fun[mid].lo)
2614 else if (offset >= sinfo->fun[mid].hi)
2617 return &sinfo->fun[mid];
2619 /* xgettext:c-format */
2620 info->callbacks->einfo (_("%pA:0x%v not found in function table\n"),
2622 bfd_set_error (bfd_error_bad_value);
2626 /* Add CALLEE to CALLER call list if not already present. Return TRUE
2627 if CALLEE was new. If this function return FALSE, CALLEE should
2631 insert_callee (struct function_info *caller, struct call_info *callee)
2633 struct call_info **pp, *p;
2635 for (pp = &caller->call_list; (p = *pp) != NULL; pp = &p->next)
2636 if (p->fun == callee->fun)
2638 /* Tail calls use less stack than normal calls. Retain entry
2639 for normal call over one for tail call. */
2640 p->is_tail &= callee->is_tail;
2643 p->fun->start = NULL;
2644 p->fun->is_func = TRUE;
2646 p->count += callee->count;
2647 /* Reorder list so most recent call is first. */
2649 p->next = caller->call_list;
2650 caller->call_list = p;
2653 callee->next = caller->call_list;
2654 caller->call_list = callee;
2658 /* Copy CALL and insert the copy into CALLER. */
2661 copy_callee (struct function_info *caller, const struct call_info *call)
2663 struct call_info *callee;
2664 callee = bfd_malloc (sizeof (*callee));
2668 if (!insert_callee (caller, callee))
2673 /* We're only interested in code sections. Testing SEC_IN_MEMORY excludes
2674 overlay stub sections. */
2677 interesting_section (asection *s)
2679 return (s->output_section != bfd_abs_section_ptr
2680 && ((s->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_IN_MEMORY))
2681 == (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2685 /* Rummage through the relocs for SEC, looking for function calls.
2686 If CALL_TREE is true, fill in call graph. If CALL_TREE is false,
2687 mark destination symbols on calls as being functions. Also
2688 look at branches, which may be tail calls or go to hot/cold
2689 section part of same function. */
2692 mark_functions_via_relocs (asection *sec,
2693 struct bfd_link_info *info,
2696 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2697 Elf_Internal_Shdr *symtab_hdr;
2699 unsigned int priority = 0;
2700 static bfd_boolean warned;
2702 if (!interesting_section (sec)
2703 || sec->reloc_count == 0)
2706 internal_relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
2708 if (internal_relocs == NULL)
2711 symtab_hdr = &elf_tdata (sec->owner)->symtab_hdr;
2712 psyms = &symtab_hdr->contents;
2713 irela = internal_relocs;
2714 irelaend = irela + sec->reloc_count;
2715 for (; irela < irelaend; irela++)
2717 enum elf_spu_reloc_type r_type;
2718 unsigned int r_indx;
2720 Elf_Internal_Sym *sym;
2721 struct elf_link_hash_entry *h;
2723 bfd_boolean nonbranch, is_call;
2724 struct function_info *caller;
2725 struct call_info *callee;
2727 r_type = ELF32_R_TYPE (irela->r_info);
2728 nonbranch = r_type != R_SPU_REL16 && r_type != R_SPU_ADDR16;
2730 r_indx = ELF32_R_SYM (irela->r_info);
2731 if (!get_sym_h (&h, &sym, &sym_sec, psyms, r_indx, sec->owner))
2735 || sym_sec->output_section == bfd_abs_section_ptr)
2741 unsigned char insn[4];
2743 if (!bfd_get_section_contents (sec->owner, sec, insn,
2744 irela->r_offset, 4))
2746 if (is_branch (insn))
2748 is_call = (insn[0] & 0xfd) == 0x31;
2749 priority = insn[1] & 0x0f;
2751 priority |= insn[2];
2753 priority |= insn[3];
2755 if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2756 != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2759 info->callbacks->einfo
2760 /* xgettext:c-format */
2761 (_("%pB(%pA+0x%v): call to non-code section"
2762 " %pB(%pA), analysis incomplete\n"),
2763 sec->owner, sec, irela->r_offset,
2764 sym_sec->owner, sym_sec);
2779 /* For --auto-overlay, count possible stubs we need for
2780 function pointer references. */
2781 unsigned int sym_type;
2785 sym_type = ELF_ST_TYPE (sym->st_info);
2786 if (sym_type == STT_FUNC)
2788 if (call_tree && spu_hash_table (info)->params->auto_overlay)
2789 spu_hash_table (info)->non_ovly_stub += 1;
2790 /* If the symbol type is STT_FUNC then this must be a
2791 function pointer initialisation. */
2794 /* Ignore data references. */
2795 if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2796 != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2798 /* Otherwise we probably have a jump table reloc for
2799 a switch statement or some other reference to a
2804 val = h->root.u.def.value;
2806 val = sym->st_value;
2807 val += irela->r_addend;
2811 struct function_info *fun;
2813 if (irela->r_addend != 0)
2815 Elf_Internal_Sym *fake = bfd_zmalloc (sizeof (*fake));
2818 fake->st_value = val;
2820 = _bfd_elf_section_from_bfd_section (sym_sec->owner, sym_sec);
2824 fun = maybe_insert_function (sym_sec, sym, FALSE, is_call);
2826 fun = maybe_insert_function (sym_sec, h, TRUE, is_call);
2829 if (irela->r_addend != 0
2830 && fun->u.sym != sym)
2835 caller = find_function (sec, irela->r_offset, info);
2838 callee = bfd_malloc (sizeof *callee);
2842 callee->fun = find_function (sym_sec, val, info);
2843 if (callee->fun == NULL)
2845 callee->is_tail = !is_call;
2846 callee->is_pasted = FALSE;
2847 callee->broken_cycle = FALSE;
2848 callee->priority = priority;
2849 callee->count = nonbranch? 0 : 1;
2850 if (callee->fun->last_caller != sec)
2852 callee->fun->last_caller = sec;
2853 callee->fun->call_count += 1;
2855 if (!insert_callee (caller, callee))
2858 && !callee->fun->is_func
2859 && callee->fun->stack == 0)
2861 /* This is either a tail call or a branch from one part of
2862 the function to another, ie. hot/cold section. If the
2863 destination has been called by some other function then
2864 it is a separate function. We also assume that functions
2865 are not split across input files. */
2866 if (sec->owner != sym_sec->owner)
2868 callee->fun->start = NULL;
2869 callee->fun->is_func = TRUE;
2871 else if (callee->fun->start == NULL)
2873 struct function_info *caller_start = caller;
2874 while (caller_start->start)
2875 caller_start = caller_start->start;
2877 if (caller_start != callee->fun)
2878 callee->fun->start = caller_start;
2882 struct function_info *callee_start;
2883 struct function_info *caller_start;
2884 callee_start = callee->fun;
2885 while (callee_start->start)
2886 callee_start = callee_start->start;
2887 caller_start = caller;
2888 while (caller_start->start)
2889 caller_start = caller_start->start;
2890 if (caller_start != callee_start)
2892 callee->fun->start = NULL;
2893 callee->fun->is_func = TRUE;
2902 /* Handle something like .init or .fini, which has a piece of a function.
2903 These sections are pasted together to form a single function. */
2906 pasted_function (asection *sec)
2908 struct bfd_link_order *l;
2909 struct _spu_elf_section_data *sec_data;
2910 struct spu_elf_stack_info *sinfo;
2911 Elf_Internal_Sym *fake;
2912 struct function_info *fun, *fun_start;
2914 fake = bfd_zmalloc (sizeof (*fake));
2918 fake->st_size = sec->size;
2920 = _bfd_elf_section_from_bfd_section (sec->owner, sec);
2921 fun = maybe_insert_function (sec, fake, FALSE, FALSE);
2925 /* Find a function immediately preceding this section. */
2927 for (l = sec->output_section->map_head.link_order; l != NULL; l = l->next)
2929 if (l->u.indirect.section == sec)
2931 if (fun_start != NULL)
2933 struct call_info *callee = bfd_malloc (sizeof *callee);
2937 fun->start = fun_start;
2939 callee->is_tail = TRUE;
2940 callee->is_pasted = TRUE;
2941 callee->broken_cycle = FALSE;
2942 callee->priority = 0;
2944 if (!insert_callee (fun_start, callee))
2950 if (l->type == bfd_indirect_link_order
2951 && (sec_data = spu_elf_section_data (l->u.indirect.section)) != NULL
2952 && (sinfo = sec_data->u.i.stack_info) != NULL
2953 && sinfo->num_fun != 0)
2954 fun_start = &sinfo->fun[sinfo->num_fun - 1];
2957 /* Don't return an error if we did not find a function preceding this
2958 section. The section may have incorrect flags. */
2962 /* Map address ranges in code sections to functions. */
2965 discover_functions (struct bfd_link_info *info)
2969 Elf_Internal_Sym ***psym_arr;
2970 asection ***sec_arr;
2971 bfd_boolean gaps = FALSE;
2974 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2977 psym_arr = bfd_zmalloc (bfd_idx * sizeof (*psym_arr));
2978 if (psym_arr == NULL)
2980 sec_arr = bfd_zmalloc (bfd_idx * sizeof (*sec_arr));
2981 if (sec_arr == NULL)
2984 for (ibfd = info->input_bfds, bfd_idx = 0;
2986 ibfd = ibfd->link.next, bfd_idx++)
2988 extern const bfd_target spu_elf32_vec;
2989 Elf_Internal_Shdr *symtab_hdr;
2992 Elf_Internal_Sym *syms, *sy, **psyms, **psy;
2993 asection **psecs, **p;
2995 if (ibfd->xvec != &spu_elf32_vec)
2998 /* Read all the symbols. */
2999 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3000 symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
3004 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
3005 if (interesting_section (sec))
3013 if (symtab_hdr->contents != NULL)
3015 /* Don't use cached symbols since the generic ELF linker
3016 code only reads local symbols, and we need globals too. */
3017 free (symtab_hdr->contents);
3018 symtab_hdr->contents = NULL;
3020 syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, 0,
3022 symtab_hdr->contents = (void *) syms;
3026 /* Select defined function symbols that are going to be output. */
3027 psyms = bfd_malloc ((symcount + 1) * sizeof (*psyms));
3030 psym_arr[bfd_idx] = psyms;
3031 psecs = bfd_malloc (symcount * sizeof (*psecs));
3034 sec_arr[bfd_idx] = psecs;
3035 for (psy = psyms, p = psecs, sy = syms; sy < syms + symcount; ++p, ++sy)
3036 if (ELF_ST_TYPE (sy->st_info) == STT_NOTYPE
3037 || ELF_ST_TYPE (sy->st_info) == STT_FUNC)
3041 *p = s = bfd_section_from_elf_index (ibfd, sy->st_shndx);
3042 if (s != NULL && interesting_section (s))
3045 symcount = psy - psyms;
3048 /* Sort them by section and offset within section. */
3049 sort_syms_syms = syms;
3050 sort_syms_psecs = psecs;
3051 qsort (psyms, symcount, sizeof (*psyms), sort_syms);
3053 /* Now inspect the function symbols. */
3054 for (psy = psyms; psy < psyms + symcount; )
3056 asection *s = psecs[*psy - syms];
3057 Elf_Internal_Sym **psy2;
3059 for (psy2 = psy; ++psy2 < psyms + symcount; )
3060 if (psecs[*psy2 - syms] != s)
3063 if (!alloc_stack_info (s, psy2 - psy))
3068 /* First install info about properly typed and sized functions.
3069 In an ideal world this will cover all code sections, except
3070 when partitioning functions into hot and cold sections,
3071 and the horrible pasted together .init and .fini functions. */
3072 for (psy = psyms; psy < psyms + symcount; ++psy)
3075 if (ELF_ST_TYPE (sy->st_info) == STT_FUNC)
3077 asection *s = psecs[sy - syms];
3078 if (!maybe_insert_function (s, sy, FALSE, TRUE))
3083 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
3084 if (interesting_section (sec))
3085 gaps |= check_function_ranges (sec, info);
3090 /* See if we can discover more function symbols by looking at
3092 for (ibfd = info->input_bfds, bfd_idx = 0;
3094 ibfd = ibfd->link.next, bfd_idx++)
3098 if (psym_arr[bfd_idx] == NULL)
3101 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3102 if (!mark_functions_via_relocs (sec, info, FALSE))
3106 for (ibfd = info->input_bfds, bfd_idx = 0;
3108 ibfd = ibfd->link.next, bfd_idx++)
3110 Elf_Internal_Shdr *symtab_hdr;
3112 Elf_Internal_Sym *syms, *sy, **psyms, **psy;
3115 if ((psyms = psym_arr[bfd_idx]) == NULL)
3118 psecs = sec_arr[bfd_idx];
3120 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3121 syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3124 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
3125 if (interesting_section (sec))
3126 gaps |= check_function_ranges (sec, info);
3130 /* Finally, install all globals. */
3131 for (psy = psyms; (sy = *psy) != NULL; ++psy)
3135 s = psecs[sy - syms];
3137 /* Global syms might be improperly typed functions. */
3138 if (ELF_ST_TYPE (sy->st_info) != STT_FUNC
3139 && ELF_ST_BIND (sy->st_info) == STB_GLOBAL)
3141 if (!maybe_insert_function (s, sy, FALSE, FALSE))
3147 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3149 extern const bfd_target spu_elf32_vec;
3152 if (ibfd->xvec != &spu_elf32_vec)
3155 /* Some of the symbols we've installed as marking the
3156 beginning of functions may have a size of zero. Extend
3157 the range of such functions to the beginning of the
3158 next symbol of interest. */
3159 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3160 if (interesting_section (sec))
3162 struct _spu_elf_section_data *sec_data;
3163 struct spu_elf_stack_info *sinfo;
3165 sec_data = spu_elf_section_data (sec);
3166 sinfo = sec_data->u.i.stack_info;
3167 if (sinfo != NULL && sinfo->num_fun != 0)
3170 bfd_vma hi = sec->size;
3172 for (fun_idx = sinfo->num_fun; --fun_idx >= 0; )
3174 sinfo->fun[fun_idx].hi = hi;
3175 hi = sinfo->fun[fun_idx].lo;
3178 sinfo->fun[0].lo = 0;
3180 /* No symbols in this section. Must be .init or .fini
3181 or something similar. */
3182 else if (!pasted_function (sec))
3188 for (ibfd = info->input_bfds, bfd_idx = 0;
3190 ibfd = ibfd->link.next, bfd_idx++)
3192 if (psym_arr[bfd_idx] == NULL)
3195 free (psym_arr[bfd_idx]);
3196 free (sec_arr[bfd_idx]);
3205 /* Iterate over all function_info we have collected, calling DOIT on
3206 each node if ROOT_ONLY is false. Only call DOIT on root nodes
3210 for_each_node (bfd_boolean (*doit) (struct function_info *,
3211 struct bfd_link_info *,
3213 struct bfd_link_info *info,
3219 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3221 extern const bfd_target spu_elf32_vec;
3224 if (ibfd->xvec != &spu_elf32_vec)
3227 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3229 struct _spu_elf_section_data *sec_data;
3230 struct spu_elf_stack_info *sinfo;
3232 if ((sec_data = spu_elf_section_data (sec)) != NULL
3233 && (sinfo = sec_data->u.i.stack_info) != NULL)
3236 for (i = 0; i < sinfo->num_fun; ++i)
3237 if (!root_only || !sinfo->fun[i].non_root)
3238 if (!doit (&sinfo->fun[i], info, param))
3246 /* Transfer call info attached to struct function_info entries for
3247 all of a given function's sections to the first entry. */
3250 transfer_calls (struct function_info *fun,
3251 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3252 void *param ATTRIBUTE_UNUSED)
3254 struct function_info *start = fun->start;
3258 struct call_info *call, *call_next;
3260 while (start->start != NULL)
3261 start = start->start;
3262 for (call = fun->call_list; call != NULL; call = call_next)
3264 call_next = call->next;
3265 if (!insert_callee (start, call))
3268 fun->call_list = NULL;
3273 /* Mark nodes in the call graph that are called by some other node. */
3276 mark_non_root (struct function_info *fun,
3277 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3278 void *param ATTRIBUTE_UNUSED)
3280 struct call_info *call;
3285 for (call = fun->call_list; call; call = call->next)
3287 call->fun->non_root = TRUE;
3288 mark_non_root (call->fun, 0, 0);
3293 /* Remove cycles from the call graph. Set depth of nodes. */
3296 remove_cycles (struct function_info *fun,
3297 struct bfd_link_info *info,
3300 struct call_info **callp, *call;
3301 unsigned int depth = *(unsigned int *) param;
3302 unsigned int max_depth = depth;
3306 fun->marking = TRUE;
3308 callp = &fun->call_list;
3309 while ((call = *callp) != NULL)
3311 call->max_depth = depth + !call->is_pasted;
3312 if (!call->fun->visit2)
3314 if (!remove_cycles (call->fun, info, &call->max_depth))
3316 if (max_depth < call->max_depth)
3317 max_depth = call->max_depth;
3319 else if (call->fun->marking)
3321 struct spu_link_hash_table *htab = spu_hash_table (info);
3323 if (!htab->params->auto_overlay
3324 && htab->params->stack_analysis)
3326 const char *f1 = func_name (fun);
3327 const char *f2 = func_name (call->fun);
3329 /* xgettext:c-format */
3330 info->callbacks->info (_("stack analysis will ignore the call "
3335 call->broken_cycle = TRUE;
3337 callp = &call->next;
3339 fun->marking = FALSE;
3340 *(unsigned int *) param = max_depth;
3344 /* Check that we actually visited all nodes in remove_cycles. If we
3345 didn't, then there is some cycle in the call graph not attached to
3346 any root node. Arbitrarily choose a node in the cycle as a new
3347 root and break the cycle. */
3350 mark_detached_root (struct function_info *fun,
3351 struct bfd_link_info *info,
3356 fun->non_root = FALSE;
3357 *(unsigned int *) param = 0;
3358 return remove_cycles (fun, info, param);
3361 /* Populate call_list for each function. */
3364 build_call_tree (struct bfd_link_info *info)
3369 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3371 extern const bfd_target spu_elf32_vec;
3374 if (ibfd->xvec != &spu_elf32_vec)
3377 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3378 if (!mark_functions_via_relocs (sec, info, TRUE))
3382 /* Transfer call info from hot/cold section part of function
3384 if (!spu_hash_table (info)->params->auto_overlay
3385 && !for_each_node (transfer_calls, info, 0, FALSE))
3388 /* Find the call graph root(s). */
3389 if (!for_each_node (mark_non_root, info, 0, FALSE))
3392 /* Remove cycles from the call graph. We start from the root node(s)
3393 so that we break cycles in a reasonable place. */
3395 if (!for_each_node (remove_cycles, info, &depth, TRUE))
3398 return for_each_node (mark_detached_root, info, &depth, FALSE);
3401 /* qsort predicate to sort calls by priority, max_depth then count. */
3404 sort_calls (const void *a, const void *b)
3406 struct call_info *const *c1 = a;
3407 struct call_info *const *c2 = b;
3410 delta = (*c2)->priority - (*c1)->priority;
3414 delta = (*c2)->max_depth - (*c1)->max_depth;
3418 delta = (*c2)->count - (*c1)->count;
3422 return (char *) c1 - (char *) c2;
3426 unsigned int max_overlay_size;
3429 /* Set linker_mark and gc_mark on any sections that we will put in
3430 overlays. These flags are used by the generic ELF linker, but we
3431 won't be continuing on to bfd_elf_final_link so it is OK to use
3432 them. linker_mark is clear before we get here. Set segment_mark
3433 on sections that are part of a pasted function (excluding the last
3436 Set up function rodata section if --overlay-rodata. We don't
3437 currently include merged string constant rodata sections since
3439 Sort the call graph so that the deepest nodes will be visited
3443 mark_overlay_section (struct function_info *fun,
3444 struct bfd_link_info *info,
3447 struct call_info *call;
3449 struct _mos_param *mos_param = param;
3450 struct spu_link_hash_table *htab = spu_hash_table (info);
3456 if (!fun->sec->linker_mark
3457 && (htab->params->ovly_flavour != ovly_soft_icache
3458 || htab->params->non_ia_text
3459 || strncmp (fun->sec->name, ".text.ia.", 9) == 0
3460 || strcmp (fun->sec->name, ".init") == 0
3461 || strcmp (fun->sec->name, ".fini") == 0))
3465 fun->sec->linker_mark = 1;
3466 fun->sec->gc_mark = 1;
3467 fun->sec->segment_mark = 0;
3468 /* Ensure SEC_CODE is set on this text section (it ought to
3469 be!), and SEC_CODE is clear on rodata sections. We use
3470 this flag to differentiate the two overlay section types. */
3471 fun->sec->flags |= SEC_CODE;
3473 size = fun->sec->size;
3474 if (htab->params->auto_overlay & OVERLAY_RODATA)
3478 /* Find the rodata section corresponding to this function's
3480 if (strcmp (fun->sec->name, ".text") == 0)
3482 name = bfd_malloc (sizeof (".rodata"));
3485 memcpy (name, ".rodata", sizeof (".rodata"));
3487 else if (strncmp (fun->sec->name, ".text.", 6) == 0)
3489 size_t len = strlen (fun->sec->name);
3490 name = bfd_malloc (len + 3);
3493 memcpy (name, ".rodata", sizeof (".rodata"));
3494 memcpy (name + 7, fun->sec->name + 5, len - 4);
3496 else if (strncmp (fun->sec->name, ".gnu.linkonce.t.", 16) == 0)
3498 size_t len = strlen (fun->sec->name) + 1;
3499 name = bfd_malloc (len);
3502 memcpy (name, fun->sec->name, len);
3508 asection *rodata = NULL;
3509 asection *group_sec = elf_section_data (fun->sec)->next_in_group;
3510 if (group_sec == NULL)
3511 rodata = bfd_get_section_by_name (fun->sec->owner, name);
3513 while (group_sec != NULL && group_sec != fun->sec)
3515 if (strcmp (group_sec->name, name) == 0)
3520 group_sec = elf_section_data (group_sec)->next_in_group;
3522 fun->rodata = rodata;
3525 size += fun->rodata->size;
3526 if (htab->params->line_size != 0
3527 && size > htab->params->line_size)
3529 size -= fun->rodata->size;
3534 fun->rodata->linker_mark = 1;
3535 fun->rodata->gc_mark = 1;
3536 fun->rodata->flags &= ~SEC_CODE;
3542 if (mos_param->max_overlay_size < size)
3543 mos_param->max_overlay_size = size;
3546 for (count = 0, call = fun->call_list; call != NULL; call = call->next)
3551 struct call_info **calls = bfd_malloc (count * sizeof (*calls));
3555 for (count = 0, call = fun->call_list; call != NULL; call = call->next)
3556 calls[count++] = call;
3558 qsort (calls, count, sizeof (*calls), sort_calls);
3560 fun->call_list = NULL;
3564 calls[count]->next = fun->call_list;
3565 fun->call_list = calls[count];
3570 for (call = fun->call_list; call != NULL; call = call->next)
3572 if (call->is_pasted)
3574 /* There can only be one is_pasted call per function_info. */
3575 BFD_ASSERT (!fun->sec->segment_mark);
3576 fun->sec->segment_mark = 1;
3578 if (!call->broken_cycle
3579 && !mark_overlay_section (call->fun, info, param))
3583 /* Don't put entry code into an overlay. The overlay manager needs
3584 a stack! Also, don't mark .ovl.init as an overlay. */
3585 if (fun->lo + fun->sec->output_offset + fun->sec->output_section->vma
3586 == info->output_bfd->start_address
3587 || strncmp (fun->sec->output_section->name, ".ovl.init", 9) == 0)
3589 fun->sec->linker_mark = 0;
3590 if (fun->rodata != NULL)
3591 fun->rodata->linker_mark = 0;
3596 /* If non-zero then unmark functions called from those within sections
3597 that we need to unmark. Unfortunately this isn't reliable since the
3598 call graph cannot know the destination of function pointer calls. */
3599 #define RECURSE_UNMARK 0
3602 asection *exclude_input_section;
3603 asection *exclude_output_section;
3604 unsigned long clearing;
3607 /* Undo some of mark_overlay_section's work. */
3610 unmark_overlay_section (struct function_info *fun,
3611 struct bfd_link_info *info,
3614 struct call_info *call;
3615 struct _uos_param *uos_param = param;
3616 unsigned int excluded = 0;
3624 if (fun->sec == uos_param->exclude_input_section
3625 || fun->sec->output_section == uos_param->exclude_output_section)
3629 uos_param->clearing += excluded;
3631 if (RECURSE_UNMARK ? uos_param->clearing : excluded)
3633 fun->sec->linker_mark = 0;
3635 fun->rodata->linker_mark = 0;
3638 for (call = fun->call_list; call != NULL; call = call->next)
3639 if (!call->broken_cycle
3640 && !unmark_overlay_section (call->fun, info, param))
3644 uos_param->clearing -= excluded;
3649 unsigned int lib_size;
3650 asection **lib_sections;
3653 /* Add sections we have marked as belonging to overlays to an array
3654 for consideration as non-overlay sections. The array consist of
3655 pairs of sections, (text,rodata), for functions in the call graph. */
3658 collect_lib_sections (struct function_info *fun,
3659 struct bfd_link_info *info,
3662 struct _cl_param *lib_param = param;
3663 struct call_info *call;
3670 if (!fun->sec->linker_mark || !fun->sec->gc_mark || fun->sec->segment_mark)
3673 size = fun->sec->size;
3675 size += fun->rodata->size;
3677 if (size <= lib_param->lib_size)
3679 *lib_param->lib_sections++ = fun->sec;
3680 fun->sec->gc_mark = 0;
3681 if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
3683 *lib_param->lib_sections++ = fun->rodata;
3684 fun->rodata->gc_mark = 0;
3687 *lib_param->lib_sections++ = NULL;
3690 for (call = fun->call_list; call != NULL; call = call->next)
3691 if (!call->broken_cycle)
3692 collect_lib_sections (call->fun, info, param);
3697 /* qsort predicate to sort sections by call count. */
3700 sort_lib (const void *a, const void *b)
3702 asection *const *s1 = a;
3703 asection *const *s2 = b;
3704 struct _spu_elf_section_data *sec_data;
3705 struct spu_elf_stack_info *sinfo;
3709 if ((sec_data = spu_elf_section_data (*s1)) != NULL
3710 && (sinfo = sec_data->u.i.stack_info) != NULL)
3713 for (i = 0; i < sinfo->num_fun; ++i)
3714 delta -= sinfo->fun[i].call_count;
3717 if ((sec_data = spu_elf_section_data (*s2)) != NULL
3718 && (sinfo = sec_data->u.i.stack_info) != NULL)
3721 for (i = 0; i < sinfo->num_fun; ++i)
3722 delta += sinfo->fun[i].call_count;
3731 /* Remove some sections from those marked to be in overlays. Choose
3732 those that are called from many places, likely library functions. */
3735 auto_ovl_lib_functions (struct bfd_link_info *info, unsigned int lib_size)
3738 asection **lib_sections;
3739 unsigned int i, lib_count;
3740 struct _cl_param collect_lib_param;
3741 struct function_info dummy_caller;
3742 struct spu_link_hash_table *htab;
3744 memset (&dummy_caller, 0, sizeof (dummy_caller));
3746 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3748 extern const bfd_target spu_elf32_vec;
3751 if (ibfd->xvec != &spu_elf32_vec)
3754 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3755 if (sec->linker_mark
3756 && sec->size < lib_size
3757 && (sec->flags & SEC_CODE) != 0)
3760 lib_sections = bfd_malloc (lib_count * 2 * sizeof (*lib_sections));
3761 if (lib_sections == NULL)
3762 return (unsigned int) -1;
3763 collect_lib_param.lib_size = lib_size;
3764 collect_lib_param.lib_sections = lib_sections;
3765 if (!for_each_node (collect_lib_sections, info, &collect_lib_param,
3767 return (unsigned int) -1;
3768 lib_count = (collect_lib_param.lib_sections - lib_sections) / 2;
3770 /* Sort sections so that those with the most calls are first. */
3772 qsort (lib_sections, lib_count, 2 * sizeof (*lib_sections), sort_lib);
3774 htab = spu_hash_table (info);
3775 for (i = 0; i < lib_count; i++)
3777 unsigned int tmp, stub_size;
3779 struct _spu_elf_section_data *sec_data;
3780 struct spu_elf_stack_info *sinfo;
3782 sec = lib_sections[2 * i];
3783 /* If this section is OK, its size must be less than lib_size. */
3785 /* If it has a rodata section, then add that too. */
3786 if (lib_sections[2 * i + 1])
3787 tmp += lib_sections[2 * i + 1]->size;
3788 /* Add any new overlay call stubs needed by the section. */
3791 && (sec_data = spu_elf_section_data (sec)) != NULL
3792 && (sinfo = sec_data->u.i.stack_info) != NULL)
3795 struct call_info *call;
3797 for (k = 0; k < sinfo->num_fun; ++k)
3798 for (call = sinfo->fun[k].call_list; call; call = call->next)
3799 if (call->fun->sec->linker_mark)
3801 struct call_info *p;
3802 for (p = dummy_caller.call_list; p; p = p->next)
3803 if (p->fun == call->fun)
3806 stub_size += ovl_stub_size (htab->params);
3809 if (tmp + stub_size < lib_size)
3811 struct call_info **pp, *p;
3813 /* This section fits. Mark it as non-overlay. */
3814 lib_sections[2 * i]->linker_mark = 0;
3815 if (lib_sections[2 * i + 1])
3816 lib_sections[2 * i + 1]->linker_mark = 0;
3817 lib_size -= tmp + stub_size;
3818 /* Call stubs to the section we just added are no longer
3820 pp = &dummy_caller.call_list;
3821 while ((p = *pp) != NULL)
3822 if (!p->fun->sec->linker_mark)
3824 lib_size += ovl_stub_size (htab->params);
3830 /* Add new call stubs to dummy_caller. */
3831 if ((sec_data = spu_elf_section_data (sec)) != NULL
3832 && (sinfo = sec_data->u.i.stack_info) != NULL)
3835 struct call_info *call;
3837 for (k = 0; k < sinfo->num_fun; ++k)
3838 for (call = sinfo->fun[k].call_list;
3841 if (call->fun->sec->linker_mark)
3843 struct call_info *callee;
3844 callee = bfd_malloc (sizeof (*callee));
3846 return (unsigned int) -1;
3848 if (!insert_callee (&dummy_caller, callee))
3854 while (dummy_caller.call_list != NULL)
3856 struct call_info *call = dummy_caller.call_list;
3857 dummy_caller.call_list = call->next;
3860 for (i = 0; i < 2 * lib_count; i++)
3861 if (lib_sections[i])
3862 lib_sections[i]->gc_mark = 1;
3863 free (lib_sections);
3867 /* Build an array of overlay sections. The deepest node's section is
3868 added first, then its parent node's section, then everything called
3869 from the parent section. The idea being to group sections to
3870 minimise calls between different overlays. */
3873 collect_overlays (struct function_info *fun,
3874 struct bfd_link_info *info,
3877 struct call_info *call;
3878 bfd_boolean added_fun;
3879 asection ***ovly_sections = param;
3885 for (call = fun->call_list; call != NULL; call = call->next)
3886 if (!call->is_pasted && !call->broken_cycle)
3888 if (!collect_overlays (call->fun, info, ovly_sections))
3894 if (fun->sec->linker_mark && fun->sec->gc_mark)
3896 fun->sec->gc_mark = 0;
3897 *(*ovly_sections)++ = fun->sec;
3898 if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
3900 fun->rodata->gc_mark = 0;
3901 *(*ovly_sections)++ = fun->rodata;
3904 *(*ovly_sections)++ = NULL;
3907 /* Pasted sections must stay with the first section. We don't
3908 put pasted sections in the array, just the first section.
3909 Mark subsequent sections as already considered. */
3910 if (fun->sec->segment_mark)
3912 struct function_info *call_fun = fun;
3915 for (call = call_fun->call_list; call != NULL; call = call->next)
3916 if (call->is_pasted)
3918 call_fun = call->fun;
3919 call_fun->sec->gc_mark = 0;
3920 if (call_fun->rodata)
3921 call_fun->rodata->gc_mark = 0;
3927 while (call_fun->sec->segment_mark);
3931 for (call = fun->call_list; call != NULL; call = call->next)
3932 if (!call->broken_cycle
3933 && !collect_overlays (call->fun, info, ovly_sections))
3938 struct _spu_elf_section_data *sec_data;
3939 struct spu_elf_stack_info *sinfo;
3941 if ((sec_data = spu_elf_section_data (fun->sec)) != NULL
3942 && (sinfo = sec_data->u.i.stack_info) != NULL)
3945 for (i = 0; i < sinfo->num_fun; ++i)
3946 if (!collect_overlays (&sinfo->fun[i], info, ovly_sections))
3954 struct _sum_stack_param {
3956 size_t overall_stack;
3957 bfd_boolean emit_stack_syms;
3960 /* Descend the call graph for FUN, accumulating total stack required. */
3963 sum_stack (struct function_info *fun,
3964 struct bfd_link_info *info,
3967 struct call_info *call;
3968 struct function_info *max;
3969 size_t stack, cum_stack;
3971 bfd_boolean has_call;
3972 struct _sum_stack_param *sum_stack_param = param;
3973 struct spu_link_hash_table *htab;
3975 cum_stack = fun->stack;
3976 sum_stack_param->cum_stack = cum_stack;
3982 for (call = fun->call_list; call; call = call->next)
3984 if (call->broken_cycle)
3986 if (!call->is_pasted)
3988 if (!sum_stack (call->fun, info, sum_stack_param))
3990 stack = sum_stack_param->cum_stack;
3991 /* Include caller stack for normal calls, don't do so for
3992 tail calls. fun->stack here is local stack usage for
3994 if (!call->is_tail || call->is_pasted || call->fun->start != NULL)
3995 stack += fun->stack;
3996 if (cum_stack < stack)
4003 sum_stack_param->cum_stack = cum_stack;
4005 /* Now fun->stack holds cumulative stack. */
4006 fun->stack = cum_stack;
4010 && sum_stack_param->overall_stack < cum_stack)
4011 sum_stack_param->overall_stack = cum_stack;
4013 htab = spu_hash_table (info);
4014 if (htab->params->auto_overlay)
4017 f1 = func_name (fun);
4018 if (htab->params->stack_analysis)
4021 info->callbacks->info (" %s: 0x%v\n", f1, (bfd_vma) cum_stack);
4022 info->callbacks->minfo ("%s: 0x%v 0x%v\n",
4023 f1, (bfd_vma) stack, (bfd_vma) cum_stack);
4027 info->callbacks->minfo (_(" calls:\n"));
4028 for (call = fun->call_list; call; call = call->next)
4029 if (!call->is_pasted && !call->broken_cycle)
4031 const char *f2 = func_name (call->fun);
4032 const char *ann1 = call->fun == max ? "*" : " ";
4033 const char *ann2 = call->is_tail ? "t" : " ";
4035 info->callbacks->minfo (" %s%s %s\n", ann1, ann2, f2);
4040 if (sum_stack_param->emit_stack_syms)
4042 char *name = bfd_malloc (18 + strlen (f1));
4043 struct elf_link_hash_entry *h;
4048 if (fun->global || ELF_ST_BIND (fun->u.sym->st_info) == STB_GLOBAL)
4049 sprintf (name, "__stack_%s", f1);
4051 sprintf (name, "__stack_%x_%s", fun->sec->id & 0xffffffff, f1);
4053 h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE);
4056 && (h->root.type == bfd_link_hash_new
4057 || h->root.type == bfd_link_hash_undefined
4058 || h->root.type == bfd_link_hash_undefweak))
4060 h->root.type = bfd_link_hash_defined;
4061 h->root.u.def.section = bfd_abs_section_ptr;
4062 h->root.u.def.value = cum_stack;
4067 h->ref_regular_nonweak = 1;
4068 h->forced_local = 1;
4076 /* SEC is part of a pasted function. Return the call_info for the
4077 next section of this function. */
4079 static struct call_info *
4080 find_pasted_call (asection *sec)
4082 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
4083 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
4084 struct call_info *call;
4087 for (k = 0; k < sinfo->num_fun; ++k)
4088 for (call = sinfo->fun[k].call_list; call != NULL; call = call->next)
4089 if (call->is_pasted)
4095 /* qsort predicate to sort bfds by file name. */
4098 sort_bfds (const void *a, const void *b)
4100 bfd *const *abfd1 = a;
4101 bfd *const *abfd2 = b;
4103 return filename_cmp ((*abfd1)->filename, (*abfd2)->filename);
4107 print_one_overlay_section (FILE *script,
4110 unsigned int ovlynum,
4111 unsigned int *ovly_map,
4112 asection **ovly_sections,
4113 struct bfd_link_info *info)
4117 for (j = base; j < count && ovly_map[j] == ovlynum; j++)
4119 asection *sec = ovly_sections[2 * j];
4121 if (fprintf (script, " %s%c%s (%s)\n",
4122 (sec->owner->my_archive != NULL
4123 ? sec->owner->my_archive->filename : ""),
4124 info->path_separator,
4125 sec->owner->filename,
4128 if (sec->segment_mark)
4130 struct call_info *call = find_pasted_call (sec);
4131 while (call != NULL)
4133 struct function_info *call_fun = call->fun;
4134 sec = call_fun->sec;
4135 if (fprintf (script, " %s%c%s (%s)\n",
4136 (sec->owner->my_archive != NULL
4137 ? sec->owner->my_archive->filename : ""),
4138 info->path_separator,
4139 sec->owner->filename,
4142 for (call = call_fun->call_list; call; call = call->next)
4143 if (call->is_pasted)
4149 for (j = base; j < count && ovly_map[j] == ovlynum; j++)
4151 asection *sec = ovly_sections[2 * j + 1];
4153 && fprintf (script, " %s%c%s (%s)\n",
4154 (sec->owner->my_archive != NULL
4155 ? sec->owner->my_archive->filename : ""),
4156 info->path_separator,
4157 sec->owner->filename,
4161 sec = ovly_sections[2 * j];
4162 if (sec->segment_mark)
4164 struct call_info *call = find_pasted_call (sec);
4165 while (call != NULL)
4167 struct function_info *call_fun = call->fun;
4168 sec = call_fun->rodata;
4170 && fprintf (script, " %s%c%s (%s)\n",
4171 (sec->owner->my_archive != NULL
4172 ? sec->owner->my_archive->filename : ""),
4173 info->path_separator,
4174 sec->owner->filename,
4177 for (call = call_fun->call_list; call; call = call->next)
4178 if (call->is_pasted)
4187 /* Handle --auto-overlay. */
4190 spu_elf_auto_overlay (struct bfd_link_info *info)
4194 struct elf_segment_map *m;
4195 unsigned int fixed_size, lo, hi;
4196 unsigned int reserved;
4197 struct spu_link_hash_table *htab;
4198 unsigned int base, i, count, bfd_count;
4199 unsigned int region, ovlynum;
4200 asection **ovly_sections, **ovly_p;
4201 unsigned int *ovly_map;
4203 unsigned int total_overlay_size, overlay_size;
4204 const char *ovly_mgr_entry;
4205 struct elf_link_hash_entry *h;
4206 struct _mos_param mos_param;
4207 struct _uos_param uos_param;
4208 struct function_info dummy_caller;
4210 /* Find the extents of our loadable image. */
4211 lo = (unsigned int) -1;
4213 for (m = elf_seg_map (info->output_bfd); m != NULL; m = m->next)
4214 if (m->p_type == PT_LOAD)
4215 for (i = 0; i < m->count; i++)
4216 if (m->sections[i]->size != 0)
4218 if (m->sections[i]->vma < lo)
4219 lo = m->sections[i]->vma;
4220 if (m->sections[i]->vma + m->sections[i]->size - 1 > hi)
4221 hi = m->sections[i]->vma + m->sections[i]->size - 1;
4223 fixed_size = hi + 1 - lo;
4225 if (!discover_functions (info))
4228 if (!build_call_tree (info))
4231 htab = spu_hash_table (info);
4232 reserved = htab->params->auto_overlay_reserved;
4235 struct _sum_stack_param sum_stack_param;
4237 sum_stack_param.emit_stack_syms = 0;
4238 sum_stack_param.overall_stack = 0;
4239 if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE))
4241 reserved = (sum_stack_param.overall_stack
4242 + htab->params->extra_stack_space);
4245 /* No need for overlays if everything already fits. */
4246 if (fixed_size + reserved <= htab->local_store
4247 && htab->params->ovly_flavour != ovly_soft_icache)
4249 htab->params->auto_overlay = 0;
4253 uos_param.exclude_input_section = 0;
4254 uos_param.exclude_output_section
4255 = bfd_get_section_by_name (info->output_bfd, ".interrupt");
4257 ovly_mgr_entry = "__ovly_load";
4258 if (htab->params->ovly_flavour == ovly_soft_icache)
4259 ovly_mgr_entry = "__icache_br_handler";
4260 h = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
4261 FALSE, FALSE, FALSE);
4263 && (h->root.type == bfd_link_hash_defined
4264 || h->root.type == bfd_link_hash_defweak)
4267 /* We have a user supplied overlay manager. */
4268 uos_param.exclude_input_section = h->root.u.def.section;
4272 /* If no user overlay manager, spu_elf_load_ovl_mgr will add our
4273 builtin version to .text, and will adjust .text size. */
4274 fixed_size += (*htab->params->spu_elf_load_ovl_mgr) ();
4277 /* Mark overlay sections, and find max overlay section size. */
4278 mos_param.max_overlay_size = 0;
4279 if (!for_each_node (mark_overlay_section, info, &mos_param, TRUE))
4282 /* We can't put the overlay manager or interrupt routines in
4284 uos_param.clearing = 0;
4285 if ((uos_param.exclude_input_section
4286 || uos_param.exclude_output_section)
4287 && !for_each_node (unmark_overlay_section, info, &uos_param, TRUE))
4291 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4293 bfd_arr = bfd_malloc (bfd_count * sizeof (*bfd_arr));
4294 if (bfd_arr == NULL)
4297 /* Count overlay sections, and subtract their sizes from "fixed_size". */
4300 total_overlay_size = 0;
4301 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4303 extern const bfd_target spu_elf32_vec;
4305 unsigned int old_count;
4307 if (ibfd->xvec != &spu_elf32_vec)
4311 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4312 if (sec->linker_mark)
4314 if ((sec->flags & SEC_CODE) != 0)
4316 fixed_size -= sec->size;
4317 total_overlay_size += sec->size;
4319 else if ((sec->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)
4320 && sec->output_section->owner == info->output_bfd
4321 && strncmp (sec->output_section->name, ".ovl.init", 9) == 0)
4322 fixed_size -= sec->size;
4323 if (count != old_count)
4324 bfd_arr[bfd_count++] = ibfd;
4327 /* Since the overlay link script selects sections by file name and
4328 section name, ensure that file names are unique. */
4331 bfd_boolean ok = TRUE;
4333 qsort (bfd_arr, bfd_count, sizeof (*bfd_arr), sort_bfds);
4334 for (i = 1; i < bfd_count; ++i)
4335 if (filename_cmp (bfd_arr[i - 1]->filename, bfd_arr[i]->filename) == 0)
4337 if (bfd_arr[i - 1]->my_archive == bfd_arr[i]->my_archive)
4339 if (bfd_arr[i - 1]->my_archive && bfd_arr[i]->my_archive)
4340 /* xgettext:c-format */
4341 info->callbacks->einfo (_("%s duplicated in %s\n"),
4342 bfd_arr[i]->filename,
4343 bfd_arr[i]->my_archive->filename);
4345 info->callbacks->einfo (_("%s duplicated\n"),
4346 bfd_arr[i]->filename);
4352 info->callbacks->einfo (_("sorry, no support for duplicate "
4353 "object files in auto-overlay script\n"));
4354 bfd_set_error (bfd_error_bad_value);
4360 fixed_size += reserved;
4361 fixed_size += htab->non_ovly_stub * ovl_stub_size (htab->params);
4362 if (fixed_size + mos_param.max_overlay_size <= htab->local_store)
4364 if (htab->params->ovly_flavour == ovly_soft_icache)
4366 /* Stubs in the non-icache area are bigger. */
4367 fixed_size += htab->non_ovly_stub * 16;
4368 /* Space for icache manager tables.
4369 a) Tag array, one quadword per cache line.
4370 - word 0: ia address of present line, init to zero. */
4371 fixed_size += 16 << htab->num_lines_log2;
4372 /* b) Rewrite "to" list, one quadword per cache line. */
4373 fixed_size += 16 << htab->num_lines_log2;
4374 /* c) Rewrite "from" list, one byte per outgoing branch (rounded up
4375 to a power-of-two number of full quadwords) per cache line. */
4376 fixed_size += 16 << (htab->fromelem_size_log2
4377 + htab->num_lines_log2);
4378 /* d) Pointer to __ea backing store (toe), 1 quadword. */
4383 /* Guess number of overlays. Assuming overlay buffer is on
4384 average only half full should be conservative. */
4385 ovlynum = (total_overlay_size * 2 * htab->params->num_lines
4386 / (htab->local_store - fixed_size));
4387 /* Space for _ovly_table[], _ovly_buf_table[] and toe. */
4388 fixed_size += ovlynum * 16 + 16 + 4 + 16;
4392 if (fixed_size + mos_param.max_overlay_size > htab->local_store)
4393 /* xgettext:c-format */
4394 info->callbacks->einfo (_("non-overlay size of 0x%v plus maximum overlay "
4395 "size of 0x%v exceeds local store\n"),
4396 (bfd_vma) fixed_size,
4397 (bfd_vma) mos_param.max_overlay_size);
4399 /* Now see if we should put some functions in the non-overlay area. */
4400 else if (fixed_size < htab->params->auto_overlay_fixed)
4402 unsigned int max_fixed, lib_size;
4404 max_fixed = htab->local_store - mos_param.max_overlay_size;
4405 if (max_fixed > htab->params->auto_overlay_fixed)
4406 max_fixed = htab->params->auto_overlay_fixed;
4407 lib_size = max_fixed - fixed_size;
4408 lib_size = auto_ovl_lib_functions (info, lib_size);
4409 if (lib_size == (unsigned int) -1)
4411 fixed_size = max_fixed - lib_size;
4414 /* Build an array of sections, suitably sorted to place into
4416 ovly_sections = bfd_malloc (2 * count * sizeof (*ovly_sections));
4417 if (ovly_sections == NULL)
4419 ovly_p = ovly_sections;
4420 if (!for_each_node (collect_overlays, info, &ovly_p, TRUE))
4422 count = (size_t) (ovly_p - ovly_sections) / 2;
4423 ovly_map = bfd_malloc (count * sizeof (*ovly_map));
4424 if (ovly_map == NULL)
4427 memset (&dummy_caller, 0, sizeof (dummy_caller));
4428 overlay_size = (htab->local_store - fixed_size) / htab->params->num_lines;
4429 if (htab->params->line_size != 0)
4430 overlay_size = htab->params->line_size;
4433 while (base < count)
4435 unsigned int size = 0, rosize = 0, roalign = 0;
4437 for (i = base; i < count; i++)
4439 asection *sec, *rosec;
4440 unsigned int tmp, rotmp;
4441 unsigned int num_stubs;
4442 struct call_info *call, *pasty;
4443 struct _spu_elf_section_data *sec_data;
4444 struct spu_elf_stack_info *sinfo;
4447 /* See whether we can add this section to the current
4448 overlay without overflowing our overlay buffer. */
4449 sec = ovly_sections[2 * i];
4450 tmp = align_power (size, sec->alignment_power) + sec->size;
4452 rosec = ovly_sections[2 * i + 1];
4455 rotmp = align_power (rotmp, rosec->alignment_power) + rosec->size;
4456 if (roalign < rosec->alignment_power)
4457 roalign = rosec->alignment_power;
4459 if (align_power (tmp, roalign) + rotmp > overlay_size)
4461 if (sec->segment_mark)
4463 /* Pasted sections must stay together, so add their
4465 pasty = find_pasted_call (sec);
4466 while (pasty != NULL)
4468 struct function_info *call_fun = pasty->fun;
4469 tmp = (align_power (tmp, call_fun->sec->alignment_power)
4470 + call_fun->sec->size);
4471 if (call_fun->rodata)
4473 rotmp = (align_power (rotmp,
4474 call_fun->rodata->alignment_power)
4475 + call_fun->rodata->size);
4476 if (roalign < rosec->alignment_power)
4477 roalign = rosec->alignment_power;
4479 for (pasty = call_fun->call_list; pasty; pasty = pasty->next)
4480 if (pasty->is_pasted)
4484 if (align_power (tmp, roalign) + rotmp > overlay_size)
4487 /* If we add this section, we might need new overlay call
4488 stubs. Add any overlay section calls to dummy_call. */
4490 sec_data = spu_elf_section_data (sec);
4491 sinfo = sec_data->u.i.stack_info;
4492 for (k = 0; k < (unsigned) sinfo->num_fun; ++k)
4493 for (call = sinfo->fun[k].call_list; call; call = call->next)
4494 if (call->is_pasted)
4496 BFD_ASSERT (pasty == NULL);
4499 else if (call->fun->sec->linker_mark)
4501 if (!copy_callee (&dummy_caller, call))
4504 while (pasty != NULL)
4506 struct function_info *call_fun = pasty->fun;
4508 for (call = call_fun->call_list; call; call = call->next)
4509 if (call->is_pasted)
4511 BFD_ASSERT (pasty == NULL);
4514 else if (!copy_callee (&dummy_caller, call))
4518 /* Calculate call stub size. */
4520 for (call = dummy_caller.call_list; call; call = call->next)
4522 unsigned int stub_delta = 1;
4524 if (htab->params->ovly_flavour == ovly_soft_icache)
4525 stub_delta = call->count;
4526 num_stubs += stub_delta;
4528 /* If the call is within this overlay, we won't need a
4530 for (k = base; k < i + 1; k++)
4531 if (call->fun->sec == ovly_sections[2 * k])
4533 num_stubs -= stub_delta;
4537 if (htab->params->ovly_flavour == ovly_soft_icache
4538 && num_stubs > htab->params->max_branch)
4540 if (align_power (tmp, roalign) + rotmp
4541 + num_stubs * ovl_stub_size (htab->params) > overlay_size)
4549 /* xgettext:c-format */
4550 info->callbacks->einfo (_("%pB:%pA%s exceeds overlay size\n"),
4551 ovly_sections[2 * i]->owner,
4552 ovly_sections[2 * i],
4553 ovly_sections[2 * i + 1] ? " + rodata" : "");
4554 bfd_set_error (bfd_error_bad_value);
4558 while (dummy_caller.call_list != NULL)
4560 struct call_info *call = dummy_caller.call_list;
4561 dummy_caller.call_list = call->next;
4567 ovly_map[base++] = ovlynum;
4570 script = htab->params->spu_elf_open_overlay_script ();
4572 if (htab->params->ovly_flavour == ovly_soft_icache)
4574 if (fprintf (script, "SECTIONS\n{\n") <= 0)
4577 if (fprintf (script,
4578 " . = ALIGN (%u);\n"
4579 " .ovl.init : { *(.ovl.init) }\n"
4580 " . = ABSOLUTE (ADDR (.ovl.init));\n",
4581 htab->params->line_size) <= 0)
4586 while (base < count)
4588 unsigned int indx = ovlynum - 1;
4589 unsigned int vma, lma;
4591 vma = (indx & (htab->params->num_lines - 1)) << htab->line_size_log2;
4592 lma = vma + (((indx >> htab->num_lines_log2) + 1) << 18);
4594 if (fprintf (script, " .ovly%u ABSOLUTE (ADDR (.ovl.init)) + %u "
4595 ": AT (LOADADDR (.ovl.init) + %u) {\n",
4596 ovlynum, vma, lma) <= 0)
4599 base = print_one_overlay_section (script, base, count, ovlynum,
4600 ovly_map, ovly_sections, info);
4601 if (base == (unsigned) -1)
4604 if (fprintf (script, " }\n") <= 0)
4610 if (fprintf (script, " . = ABSOLUTE (ADDR (.ovl.init)) + %u;\n",
4611 1 << (htab->num_lines_log2 + htab->line_size_log2)) <= 0)
4614 if (fprintf (script, "}\nINSERT AFTER .toe;\n") <= 0)
4619 if (fprintf (script, "SECTIONS\n{\n") <= 0)
4622 if (fprintf (script,
4623 " . = ALIGN (16);\n"
4624 " .ovl.init : { *(.ovl.init) }\n"
4625 " . = ABSOLUTE (ADDR (.ovl.init));\n") <= 0)
4628 for (region = 1; region <= htab->params->num_lines; region++)
4632 while (base < count && ovly_map[base] < ovlynum)
4640 /* We need to set lma since we are overlaying .ovl.init. */
4641 if (fprintf (script,
4642 " OVERLAY : AT (ALIGN (LOADADDR (.ovl.init) + SIZEOF (.ovl.init), 16))\n {\n") <= 0)
4647 if (fprintf (script, " OVERLAY :\n {\n") <= 0)
4651 while (base < count)
4653 if (fprintf (script, " .ovly%u {\n", ovlynum) <= 0)
4656 base = print_one_overlay_section (script, base, count, ovlynum,
4657 ovly_map, ovly_sections, info);
4658 if (base == (unsigned) -1)
4661 if (fprintf (script, " }\n") <= 0)
4664 ovlynum += htab->params->num_lines;
4665 while (base < count && ovly_map[base] < ovlynum)
4669 if (fprintf (script, " }\n") <= 0)
4673 if (fprintf (script, "}\nINSERT BEFORE .text;\n") <= 0)
4678 free (ovly_sections);
4680 if (fclose (script) != 0)
4683 if (htab->params->auto_overlay & AUTO_RELINK)
4684 (*htab->params->spu_elf_relink) ();
4689 bfd_set_error (bfd_error_system_call);
4691 info->callbacks->einfo (_("%F%P: auto overlay error: %E\n"));
4695 /* Provide an estimate of total stack required. */
4698 spu_elf_stack_analysis (struct bfd_link_info *info)
4700 struct spu_link_hash_table *htab;
4701 struct _sum_stack_param sum_stack_param;
4703 if (!discover_functions (info))
4706 if (!build_call_tree (info))
4709 htab = spu_hash_table (info);
4710 if (htab->params->stack_analysis)
4712 info->callbacks->info (_("Stack size for call graph root nodes.\n"));
4713 info->callbacks->minfo (_("\nStack size for functions. "
4714 "Annotations: '*' max stack, 't' tail call\n"));
4717 sum_stack_param.emit_stack_syms = htab->params->emit_stack_syms;
4718 sum_stack_param.overall_stack = 0;
4719 if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE))
4722 if (htab->params->stack_analysis)
4723 info->callbacks->info (_("Maximum stack required is 0x%v\n"),
4724 (bfd_vma) sum_stack_param.overall_stack);
4728 /* Perform a final link. */
4731 spu_elf_final_link (bfd *output_bfd, struct bfd_link_info *info)
4733 struct spu_link_hash_table *htab = spu_hash_table (info);
4735 if (htab->params->auto_overlay)
4736 spu_elf_auto_overlay (info);
4738 if ((htab->params->stack_analysis
4739 || (htab->params->ovly_flavour == ovly_soft_icache
4740 && htab->params->lrlive_analysis))
4741 && !spu_elf_stack_analysis (info))
4742 info->callbacks->einfo (_("%X%P: stack/lrlive analysis error: %E\n"));
4744 if (!spu_elf_build_stubs (info))
4745 info->callbacks->einfo (_("%F%P: can not build overlay stubs: %E\n"));
4747 return bfd_elf_final_link (output_bfd, info);
4750 /* Called when not normally emitting relocs, ie. !bfd_link_relocatable (info)
4751 and !info->emitrelocations. Returns a count of special relocs
4752 that need to be emitted. */
4755 spu_elf_count_relocs (struct bfd_link_info *info, asection *sec)
4757 Elf_Internal_Rela *relocs;
4758 unsigned int count = 0;
4760 relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
4764 Elf_Internal_Rela *rel;
4765 Elf_Internal_Rela *relend = relocs + sec->reloc_count;
4767 for (rel = relocs; rel < relend; rel++)
4769 int r_type = ELF32_R_TYPE (rel->r_info);
4770 if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
4774 if (elf_section_data (sec)->relocs != relocs)
4781 /* Functions for adding fixup records to .fixup */
4783 #define FIXUP_RECORD_SIZE 4
4785 #define FIXUP_PUT(output_bfd,htab,index,addr) \
4786 bfd_put_32 (output_bfd, addr, \
4787 htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
4788 #define FIXUP_GET(output_bfd,htab,index) \
4789 bfd_get_32 (output_bfd, \
4790 htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
4792 /* Store OFFSET in .fixup. This assumes it will be called with an
4793 increasing OFFSET. When this OFFSET fits with the last base offset,
4794 it just sets a bit, otherwise it adds a new fixup record. */
4796 spu_elf_emit_fixup (bfd * output_bfd, struct bfd_link_info *info,
4799 struct spu_link_hash_table *htab = spu_hash_table (info);
4800 asection *sfixup = htab->sfixup;
4801 bfd_vma qaddr = offset & ~(bfd_vma) 15;
4802 bfd_vma bit = ((bfd_vma) 8) >> ((offset & 15) >> 2);
4803 if (sfixup->reloc_count == 0)
4805 FIXUP_PUT (output_bfd, htab, 0, qaddr | bit);
4806 sfixup->reloc_count++;
4810 bfd_vma base = FIXUP_GET (output_bfd, htab, sfixup->reloc_count - 1);
4811 if (qaddr != (base & ~(bfd_vma) 15))
4813 if ((sfixup->reloc_count + 1) * FIXUP_RECORD_SIZE > sfixup->size)
4814 _bfd_error_handler (_("fatal error while creating .fixup"));
4815 FIXUP_PUT (output_bfd, htab, sfixup->reloc_count, qaddr | bit);
4816 sfixup->reloc_count++;
4819 FIXUP_PUT (output_bfd, htab, sfixup->reloc_count - 1, base | bit);
4823 /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */
4826 spu_elf_relocate_section (bfd *output_bfd,
4827 struct bfd_link_info *info,
4829 asection *input_section,
4831 Elf_Internal_Rela *relocs,
4832 Elf_Internal_Sym *local_syms,
4833 asection **local_sections)
4835 Elf_Internal_Shdr *symtab_hdr;
4836 struct elf_link_hash_entry **sym_hashes;
4837 Elf_Internal_Rela *rel, *relend;
4838 struct spu_link_hash_table *htab;
4841 bfd_boolean emit_these_relocs = FALSE;
4842 bfd_boolean is_ea_sym;
4844 unsigned int iovl = 0;
4846 htab = spu_hash_table (info);
4847 stubs = (htab->stub_sec != NULL
4848 && maybe_needs_stubs (input_section));
4849 iovl = overlay_index (input_section);
4850 ea = bfd_get_section_by_name (output_bfd, "._ea");
4851 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4852 sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd));
4855 relend = relocs + input_section->reloc_count;
4856 for (; rel < relend; rel++)
4859 reloc_howto_type *howto;
4860 unsigned int r_symndx;
4861 Elf_Internal_Sym *sym;
4863 struct elf_link_hash_entry *h;
4864 const char *sym_name;
4867 bfd_reloc_status_type r;
4868 bfd_boolean unresolved_reloc;
4869 enum _stub_type stub_type;
4871 r_symndx = ELF32_R_SYM (rel->r_info);
4872 r_type = ELF32_R_TYPE (rel->r_info);
4873 howto = elf_howto_table + r_type;
4874 unresolved_reloc = FALSE;
4878 if (r_symndx < symtab_hdr->sh_info)
4880 sym = local_syms + r_symndx;
4881 sec = local_sections[r_symndx];
4882 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
4883 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4887 if (sym_hashes == NULL)
4890 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4892 if (info->wrap_hash != NULL
4893 && (input_section->flags & SEC_DEBUGGING) != 0)
4894 h = ((struct elf_link_hash_entry *)
4895 unwrap_hash_lookup (info, input_bfd, &h->root));
4897 while (h->root.type == bfd_link_hash_indirect
4898 || h->root.type == bfd_link_hash_warning)
4899 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4902 if (h->root.type == bfd_link_hash_defined
4903 || h->root.type == bfd_link_hash_defweak)
4905 sec = h->root.u.def.section;
4907 || sec->output_section == NULL)
4908 /* Set a flag that will be cleared later if we find a
4909 relocation value for this symbol. output_section
4910 is typically NULL for symbols satisfied by a shared
4912 unresolved_reloc = TRUE;
4914 relocation = (h->root.u.def.value
4915 + sec->output_section->vma
4916 + sec->output_offset);
4918 else if (h->root.type == bfd_link_hash_undefweak)
4920 else if (info->unresolved_syms_in_objects == RM_IGNORE
4921 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4923 else if (!bfd_link_relocatable (info)
4924 && !(r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64))
4927 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
4928 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT);
4929 (*info->callbacks->undefined_symbol) (info,
4930 h->root.root.string,
4933 rel->r_offset, err);
4935 sym_name = h->root.root.string;
4938 if (sec != NULL && discarded_section (sec))
4939 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4940 rel, 1, relend, howto, 0, contents);
4942 if (bfd_link_relocatable (info))
4945 /* Change "a rt,ra,rb" to "ai rt,ra,0". */
4946 if (r_type == R_SPU_ADD_PIC
4948 && !(h->def_regular || ELF_COMMON_DEF_P (h)))
4950 bfd_byte *loc = contents + rel->r_offset;
4956 is_ea_sym = (ea != NULL
4958 && sec->output_section == ea);
4960 /* If this symbol is in an overlay area, we may need to relocate
4961 to the overlay stub. */
4962 addend = rel->r_addend;
4965 && (stub_type = needs_ovl_stub (h, sym, sec, input_section, rel,
4966 contents, info)) != no_stub)
4968 unsigned int ovl = 0;
4969 struct got_entry *g, **head;
4971 if (stub_type != nonovl_stub)
4975 head = &h->got.glist;
4977 head = elf_local_got_ents (input_bfd) + r_symndx;
4979 for (g = *head; g != NULL; g = g->next)
4980 if (htab->params->ovly_flavour == ovly_soft_icache
4982 && g->br_addr == (rel->r_offset
4983 + input_section->output_offset
4984 + input_section->output_section->vma))
4985 : g->addend == addend && (g->ovl == ovl || g->ovl == 0))
4990 relocation = g->stub_addr;
4995 /* For soft icache, encode the overlay index into addresses. */
4996 if (htab->params->ovly_flavour == ovly_soft_icache
4997 && (r_type == R_SPU_ADDR16_HI
4998 || r_type == R_SPU_ADDR32 || r_type == R_SPU_REL32)
5001 unsigned int ovl = overlay_index (sec);
5004 unsigned int set_id = ((ovl - 1) >> htab->num_lines_log2) + 1;
5005 relocation += set_id << 18;
5010 if (htab->params->emit_fixups && !bfd_link_relocatable (info)
5011 && (input_section->flags & SEC_ALLOC) != 0
5012 && r_type == R_SPU_ADDR32)
5015 offset = rel->r_offset + input_section->output_section->vma
5016 + input_section->output_offset;
5017 spu_elf_emit_fixup (output_bfd, info, offset);
5020 if (unresolved_reloc)
5022 else if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
5026 /* ._ea is a special section that isn't allocated in SPU
5027 memory, but rather occupies space in PPU memory as
5028 part of an embedded ELF image. If this reloc is
5029 against a symbol defined in ._ea, then transform the
5030 reloc into an equivalent one without a symbol
5031 relative to the start of the ELF image. */
5032 rel->r_addend += (relocation
5034 + elf_section_data (ea)->this_hdr.sh_offset);
5035 rel->r_info = ELF32_R_INFO (0, r_type);
5037 emit_these_relocs = TRUE;
5041 unresolved_reloc = TRUE;
5043 if (unresolved_reloc
5044 && _bfd_elf_section_offset (output_bfd, info, input_section,
5045 rel->r_offset) != (bfd_vma) -1)
5048 /* xgettext:c-format */
5049 (_("%pB(%s+%#" PRIx64 "): "
5050 "unresolvable %s relocation against symbol `%s'"),
5052 bfd_get_section_name (input_bfd, input_section),
5053 (uint64_t) rel->r_offset,
5059 r = _bfd_final_link_relocate (howto,
5063 rel->r_offset, relocation, addend);
5065 if (r != bfd_reloc_ok)
5067 const char *msg = (const char *) 0;
5071 case bfd_reloc_overflow:
5072 (*info->callbacks->reloc_overflow)
5073 (info, (h ? &h->root : NULL), sym_name, howto->name,
5074 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5077 case bfd_reloc_undefined:
5078 (*info->callbacks->undefined_symbol)
5079 (info, sym_name, input_bfd, input_section, rel->r_offset, TRUE);
5082 case bfd_reloc_outofrange:
5083 msg = _("internal error: out of range error");
5086 case bfd_reloc_notsupported:
5087 msg = _("internal error: unsupported relocation error");
5090 case bfd_reloc_dangerous:
5091 msg = _("internal error: dangerous error");
5095 msg = _("internal error: unknown error");
5100 (*info->callbacks->warning) (info, msg, sym_name, input_bfd,
5101 input_section, rel->r_offset);
5108 && emit_these_relocs
5109 && !info->emitrelocations)
5111 Elf_Internal_Rela *wrel;
5112 Elf_Internal_Shdr *rel_hdr;
5114 wrel = rel = relocs;
5115 relend = relocs + input_section->reloc_count;
5116 for (; rel < relend; rel++)
5120 r_type = ELF32_R_TYPE (rel->r_info);
5121 if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
5124 input_section->reloc_count = wrel - relocs;
5125 /* Backflips for _bfd_elf_link_output_relocs. */
5126 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5127 rel_hdr->sh_size = input_section->reloc_count * rel_hdr->sh_entsize;
5135 spu_elf_finish_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5136 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5141 /* Adjust _SPUEAR_ syms to point at their overlay stubs. */
5144 spu_elf_output_symbol_hook (struct bfd_link_info *info,
5145 const char *sym_name ATTRIBUTE_UNUSED,
5146 Elf_Internal_Sym *sym,
5147 asection *sym_sec ATTRIBUTE_UNUSED,
5148 struct elf_link_hash_entry *h)
5150 struct spu_link_hash_table *htab = spu_hash_table (info);
5152 if (!bfd_link_relocatable (info)
5153 && htab->stub_sec != NULL
5155 && (h->root.type == bfd_link_hash_defined
5156 || h->root.type == bfd_link_hash_defweak)
5158 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0)
5160 struct got_entry *g;
5162 for (g = h->got.glist; g != NULL; g = g->next)
5163 if (htab->params->ovly_flavour == ovly_soft_icache
5164 ? g->br_addr == g->stub_addr
5165 : g->addend == 0 && g->ovl == 0)
5167 sym->st_shndx = (_bfd_elf_section_from_bfd_section
5168 (htab->stub_sec[0]->output_section->owner,
5169 htab->stub_sec[0]->output_section));
5170 sym->st_value = g->stub_addr;
5178 static int spu_plugin = 0;
5181 spu_elf_plugin (int val)
5186 /* Set ELF header e_type for plugins. */
5189 spu_elf_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5193 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5195 i_ehdrp->e_type = ET_DYN;
5198 _bfd_elf_post_process_headers (abfd, info);
5201 /* We may add an extra PT_LOAD segment for .toe. We also need extra
5202 segments for overlays. */
5205 spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info)
5212 struct spu_link_hash_table *htab = spu_hash_table (info);
5213 extra = htab->num_overlays;
5219 sec = bfd_get_section_by_name (abfd, ".toe");
5220 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5226 /* Remove .toe section from other PT_LOAD segments and put it in
5227 a segment of its own. Put overlays in separate segments too. */
5230 spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
5233 struct elf_segment_map *m, *m_overlay;
5234 struct elf_segment_map **p, **p_overlay, **first_load;
5240 toe = bfd_get_section_by_name (abfd, ".toe");
5241 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5242 if (m->p_type == PT_LOAD && m->count > 1)
5243 for (i = 0; i < m->count; i++)
5244 if ((s = m->sections[i]) == toe
5245 || spu_elf_section_data (s)->u.o.ovl_index != 0)
5247 struct elf_segment_map *m2;
5250 if (i + 1 < m->count)
5252 amt = sizeof (struct elf_segment_map);
5253 amt += (m->count - (i + 2)) * sizeof (m->sections[0]);
5254 m2 = bfd_zalloc (abfd, amt);
5257 m2->count = m->count - (i + 1);
5258 memcpy (m2->sections, m->sections + i + 1,
5259 m2->count * sizeof (m->sections[0]));
5260 m2->p_type = PT_LOAD;
5268 amt = sizeof (struct elf_segment_map);
5269 m2 = bfd_zalloc (abfd, amt);
5272 m2->p_type = PT_LOAD;
5274 m2->sections[0] = s;
5282 /* Some SPU ELF loaders ignore the PF_OVERLAY flag and just load all
5283 PT_LOAD segments. This can cause the .ovl.init section to be
5284 overwritten with the contents of some overlay segment. To work
5285 around this issue, we ensure that all PF_OVERLAY segments are
5286 sorted first amongst the program headers; this ensures that even
5287 with a broken loader, the .ovl.init section (which is not marked
5288 as PF_OVERLAY) will be placed into SPU local store on startup. */
5290 /* Move all overlay segments onto a separate list. */
5291 p = &elf_seg_map (abfd);
5292 p_overlay = &m_overlay;
5297 if ((*p)->p_type == PT_LOAD)
5301 if ((*p)->count == 1
5302 && spu_elf_section_data ((*p)->sections[0])->u.o.ovl_index != 0)
5307 p_overlay = &m->next;
5314 /* Re-insert overlay segments at the head of the segment map. */
5315 if (m_overlay != NULL)
5318 if (*p != NULL && (*p)->p_type == PT_LOAD && (*p)->includes_filehdr)
5319 /* It doesn't really make sense for someone to include the ELF
5320 file header into an spu image, but if they do the code that
5321 assigns p_offset needs to see the segment containing the
5331 /* Tweak the section type of .note.spu_name. */
5334 spu_elf_fake_sections (bfd *obfd ATTRIBUTE_UNUSED,
5335 Elf_Internal_Shdr *hdr,
5338 if (strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0)
5339 hdr->sh_type = SHT_NOTE;
5343 /* Tweak phdrs before writing them out. */
5346 spu_elf_modify_program_headers (bfd *abfd, struct bfd_link_info *info)
5348 const struct elf_backend_data *bed;
5349 struct elf_obj_tdata *tdata;
5350 Elf_Internal_Phdr *phdr, *last;
5351 struct spu_link_hash_table *htab;
5358 bed = get_elf_backend_data (abfd);
5359 tdata = elf_tdata (abfd);
5361 count = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
5362 htab = spu_hash_table (info);
5363 if (htab->num_overlays != 0)
5365 struct elf_segment_map *m;
5368 for (i = 0, m = elf_seg_map (abfd); m; ++i, m = m->next)
5370 && (o = spu_elf_section_data (m->sections[0])->u.o.ovl_index) != 0)
5372 /* Mark this as an overlay header. */
5373 phdr[i].p_flags |= PF_OVERLAY;
5375 if (htab->ovtab != NULL && htab->ovtab->size != 0
5376 && htab->params->ovly_flavour != ovly_soft_icache)
5378 bfd_byte *p = htab->ovtab->contents;
5379 unsigned int off = o * 16 + 8;
5381 /* Write file_off into _ovly_table. */
5382 bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off);
5385 /* Soft-icache has its file offset put in .ovl.init. */
5386 if (htab->init != NULL && htab->init->size != 0)
5388 bfd_vma val = elf_section_data (htab->ovl_sec[0])->this_hdr.sh_offset;
5390 bfd_put_32 (htab->init->owner, val, htab->init->contents + 4);
5394 /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples
5395 of 16. This should always be possible when using the standard
5396 linker scripts, but don't create overlapping segments if
5397 someone is playing games with linker scripts. */
5399 for (i = count; i-- != 0; )
5400 if (phdr[i].p_type == PT_LOAD)
5404 adjust = -phdr[i].p_filesz & 15;
5407 && phdr[i].p_offset + phdr[i].p_filesz > last->p_offset - adjust)
5410 adjust = -phdr[i].p_memsz & 15;
5413 && phdr[i].p_filesz != 0
5414 && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust
5415 && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr)
5418 if (phdr[i].p_filesz != 0)
5422 if (i == (unsigned int) -1)
5423 for (i = count; i-- != 0; )
5424 if (phdr[i].p_type == PT_LOAD)
5428 adjust = -phdr[i].p_filesz & 15;
5429 phdr[i].p_filesz += adjust;
5431 adjust = -phdr[i].p_memsz & 15;
5432 phdr[i].p_memsz += adjust;
5439 spu_elf_size_sections (bfd * output_bfd, struct bfd_link_info *info)
5441 struct spu_link_hash_table *htab = spu_hash_table (info);
5442 if (htab->params->emit_fixups)
5444 asection *sfixup = htab->sfixup;
5445 int fixup_count = 0;
5449 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5453 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5456 /* Walk over each section attached to the input bfd. */
5457 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5459 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
5462 /* If there aren't any relocs, then there's nothing more
5464 if ((isec->flags & SEC_ALLOC) == 0
5465 || (isec->flags & SEC_RELOC) == 0
5466 || isec->reloc_count == 0)
5469 /* Get the relocs. */
5471 _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
5473 if (internal_relocs == NULL)
5476 /* 1 quadword can contain up to 4 R_SPU_ADDR32
5477 relocations. They are stored in a single word by
5478 saving the upper 28 bits of the address and setting the
5479 lower 4 bits to a bit mask of the words that have the
5480 relocation. BASE_END keeps track of the next quadword. */
5481 irela = internal_relocs;
5482 irelaend = irela + isec->reloc_count;
5484 for (; irela < irelaend; irela++)
5485 if (ELF32_R_TYPE (irela->r_info) == R_SPU_ADDR32
5486 && irela->r_offset >= base_end)
5488 base_end = (irela->r_offset & ~(bfd_vma) 15) + 16;
5494 /* We always have a NULL fixup as a sentinel */
5495 size = (fixup_count + 1) * FIXUP_RECORD_SIZE;
5496 if (!bfd_set_section_size (output_bfd, sfixup, size))
5498 sfixup->contents = (bfd_byte *) bfd_zalloc (info->input_bfds, size);
5499 if (sfixup->contents == NULL)
5505 #define TARGET_BIG_SYM spu_elf32_vec
5506 #define TARGET_BIG_NAME "elf32-spu"
5507 #define ELF_ARCH bfd_arch_spu
5508 #define ELF_TARGET_ID SPU_ELF_DATA
5509 #define ELF_MACHINE_CODE EM_SPU
5510 /* This matches the alignment need for DMA. */
5511 #define ELF_MAXPAGESIZE 0x80
5512 #define elf_backend_rela_normal 1
5513 #define elf_backend_can_gc_sections 1
5515 #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup
5516 #define bfd_elf32_bfd_reloc_name_lookup spu_elf_reloc_name_lookup
5517 #define elf_info_to_howto spu_elf_info_to_howto
5518 #define elf_backend_count_relocs spu_elf_count_relocs
5519 #define elf_backend_relocate_section spu_elf_relocate_section
5520 #define elf_backend_finish_dynamic_sections spu_elf_finish_dynamic_sections
5521 #define elf_backend_symbol_processing spu_elf_backend_symbol_processing
5522 #define elf_backend_link_output_symbol_hook spu_elf_output_symbol_hook
5523 #define elf_backend_object_p spu_elf_object_p
5524 #define bfd_elf32_new_section_hook spu_elf_new_section_hook
5525 #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create
5527 #define elf_backend_additional_program_headers spu_elf_additional_program_headers
5528 #define elf_backend_modify_segment_map spu_elf_modify_segment_map
5529 #define elf_backend_modify_program_headers spu_elf_modify_program_headers
5530 #define elf_backend_post_process_headers spu_elf_post_process_headers
5531 #define elf_backend_fake_sections spu_elf_fake_sections
5532 #define elf_backend_special_sections spu_elf_special_sections
5533 #define bfd_elf32_bfd_final_link spu_elf_final_link
5535 #include "elf32-target.h"