1 /* SPU specific support for 32-bit ELF
3 Copyright (C) 2006-2015 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, 0, 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)
109 case BFD_RELOC_SPU_IMM10W:
111 case BFD_RELOC_SPU_IMM16W:
113 case BFD_RELOC_SPU_LO16:
114 return R_SPU_ADDR16_LO;
115 case BFD_RELOC_SPU_HI16:
116 return R_SPU_ADDR16_HI;
117 case BFD_RELOC_SPU_IMM18:
119 case BFD_RELOC_SPU_PCREL16:
121 case BFD_RELOC_SPU_IMM7:
123 case BFD_RELOC_SPU_IMM8:
125 case BFD_RELOC_SPU_PCREL9a:
127 case BFD_RELOC_SPU_PCREL9b:
129 case BFD_RELOC_SPU_IMM10:
130 return R_SPU_ADDR10I;
131 case BFD_RELOC_SPU_IMM16:
132 return R_SPU_ADDR16I;
135 case BFD_RELOC_32_PCREL:
137 case BFD_RELOC_SPU_PPU32:
139 case BFD_RELOC_SPU_PPU64:
141 case BFD_RELOC_SPU_ADD_PIC:
142 return R_SPU_ADD_PIC;
147 spu_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
149 Elf_Internal_Rela *dst)
151 enum elf_spu_reloc_type r_type;
153 r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info);
154 BFD_ASSERT (r_type < R_SPU_max);
155 cache_ptr->howto = &elf_howto_table[(int) r_type];
158 static reloc_howto_type *
159 spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
160 bfd_reloc_code_real_type code)
162 enum elf_spu_reloc_type r_type = spu_elf_bfd_to_reloc_type (code);
164 if (r_type == R_SPU_NONE)
167 return elf_howto_table + r_type;
170 static reloc_howto_type *
171 spu_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
176 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
177 if (elf_howto_table[i].name != NULL
178 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
179 return &elf_howto_table[i];
184 /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */
186 static bfd_reloc_status_type
187 spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
188 void *data, asection *input_section,
189 bfd *output_bfd, char **error_message)
191 bfd_size_type octets;
195 /* If this is a relocatable link (output_bfd test tells us), just
196 call the generic function. Any adjustment will be done at final
198 if (output_bfd != NULL)
199 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
200 input_section, output_bfd, error_message);
202 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
203 return bfd_reloc_outofrange;
204 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
206 /* Get symbol value. */
208 if (!bfd_is_com_section (symbol->section))
210 if (symbol->section->output_section)
211 val += symbol->section->output_section->vma;
213 val += reloc_entry->addend;
215 /* Make it pc-relative. */
216 val -= input_section->output_section->vma + input_section->output_offset;
219 if (val + 256 >= 512)
220 return bfd_reloc_overflow;
222 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
224 /* Move two high bits of value to REL9I and REL9 position.
225 The mask will take care of selecting the right field. */
226 val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16);
227 insn &= ~reloc_entry->howto->dst_mask;
228 insn |= val & reloc_entry->howto->dst_mask;
229 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
234 spu_elf_new_section_hook (bfd *abfd, asection *sec)
236 if (!sec->used_by_bfd)
238 struct _spu_elf_section_data *sdata;
240 sdata = bfd_zalloc (abfd, sizeof (*sdata));
243 sec->used_by_bfd = sdata;
246 return _bfd_elf_new_section_hook (abfd, sec);
249 /* Set up overlay info for executables. */
252 spu_elf_object_p (bfd *abfd)
254 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
256 unsigned int i, num_ovl, num_buf;
257 Elf_Internal_Phdr *phdr = elf_tdata (abfd)->phdr;
258 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
259 Elf_Internal_Phdr *last_phdr = NULL;
261 for (num_buf = 0, num_ovl = 0, i = 0; i < ehdr->e_phnum; i++, phdr++)
262 if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_OVERLAY) != 0)
267 if (last_phdr == NULL
268 || ((last_phdr->p_vaddr ^ phdr->p_vaddr) & 0x3ffff) != 0)
271 for (j = 1; j < elf_numsections (abfd); j++)
273 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[j];
275 if (ELF_SECTION_SIZE (shdr, phdr) != 0
276 && ELF_SECTION_IN_SEGMENT (shdr, phdr))
278 asection *sec = shdr->bfd_section;
279 spu_elf_section_data (sec)->u.o.ovl_index = num_ovl;
280 spu_elf_section_data (sec)->u.o.ovl_buf = num_buf;
288 /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that
289 strip --strip-unneeded will not remove them. */
292 spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
294 if (sym->name != NULL
295 && sym->section != bfd_abs_section_ptr
296 && strncmp (sym->name, "_EAR_", 5) == 0)
297 sym->flags |= BSF_KEEP;
300 /* SPU ELF linker hash table. */
302 struct spu_link_hash_table
304 struct elf_link_hash_table elf;
306 struct spu_elf_params *params;
308 /* Shortcuts to overlay sections. */
314 /* Count of stubs in each overlay section. */
315 unsigned int *stub_count;
317 /* The stub section for each overlay section. */
320 struct elf_link_hash_entry *ovly_entry[2];
322 /* Number of overlay buffers. */
323 unsigned int num_buf;
325 /* Total number of overlays. */
326 unsigned int num_overlays;
328 /* For soft icache. */
329 unsigned int line_size_log2;
330 unsigned int num_lines_log2;
331 unsigned int fromelem_size_log2;
333 /* How much memory we have. */
334 unsigned int local_store;
336 /* Count of overlay stubs needed in non-overlay area. */
337 unsigned int non_ovly_stub;
339 /* Pointer to the fixup section */
343 unsigned int stub_err : 1;
346 /* Hijack the generic got fields for overlay stub accounting. */
350 struct got_entry *next;
359 #define spu_hash_table(p) \
360 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
361 == SPU_ELF_DATA ? ((struct spu_link_hash_table *) ((p)->hash)) : NULL)
365 struct function_info *fun;
366 struct call_info *next;
368 unsigned int max_depth;
369 unsigned int is_tail : 1;
370 unsigned int is_pasted : 1;
371 unsigned int broken_cycle : 1;
372 unsigned int priority : 13;
377 /* List of functions called. Also branches to hot/cold part of
379 struct call_info *call_list;
380 /* For hot/cold part of function, point to owner. */
381 struct function_info *start;
382 /* Symbol at start of function. */
384 Elf_Internal_Sym *sym;
385 struct elf_link_hash_entry *h;
387 /* Function section. */
390 /* Where last called from, and number of sections called from. */
391 asection *last_caller;
392 unsigned int call_count;
393 /* Address range of (this part of) function. */
395 /* Offset where we found a store of lr, or -1 if none found. */
397 /* Offset where we found the stack adjustment insn. */
401 /* Distance from root of call tree. Tail and hot/cold branches
402 count as one deeper. We aren't counting stack frames here. */
404 /* Set if global symbol. */
405 unsigned int global : 1;
406 /* Set if known to be start of function (as distinct from a hunk
407 in hot/cold section. */
408 unsigned int is_func : 1;
409 /* Set if not a root node. */
410 unsigned int non_root : 1;
411 /* Flags used during call tree traversal. It's cheaper to replicate
412 the visit flags than have one which needs clearing after a traversal. */
413 unsigned int visit1 : 1;
414 unsigned int visit2 : 1;
415 unsigned int marking : 1;
416 unsigned int visit3 : 1;
417 unsigned int visit4 : 1;
418 unsigned int visit5 : 1;
419 unsigned int visit6 : 1;
420 unsigned int visit7 : 1;
423 struct spu_elf_stack_info
427 /* Variable size array describing functions, one per contiguous
428 address range belonging to a function. */
429 struct function_info fun[1];
432 static struct function_info *find_function (asection *, bfd_vma,
433 struct bfd_link_info *);
435 /* Create a spu ELF linker hash table. */
437 static struct bfd_link_hash_table *
438 spu_elf_link_hash_table_create (bfd *abfd)
440 struct spu_link_hash_table *htab;
442 htab = bfd_zmalloc (sizeof (*htab));
446 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd,
447 _bfd_elf_link_hash_newfunc,
448 sizeof (struct elf_link_hash_entry),
455 htab->elf.init_got_refcount.refcount = 0;
456 htab->elf.init_got_refcount.glist = NULL;
457 htab->elf.init_got_offset.offset = 0;
458 htab->elf.init_got_offset.glist = NULL;
459 return &htab->elf.root;
463 spu_elf_setup (struct bfd_link_info *info, struct spu_elf_params *params)
465 bfd_vma max_branch_log2;
467 struct spu_link_hash_table *htab = spu_hash_table (info);
468 htab->params = params;
469 htab->line_size_log2 = bfd_log2 (htab->params->line_size);
470 htab->num_lines_log2 = bfd_log2 (htab->params->num_lines);
472 /* For the software i-cache, we provide a "from" list whose size
473 is a power-of-two number of quadwords, big enough to hold one
474 byte per outgoing branch. Compute this number here. */
475 max_branch_log2 = bfd_log2 (htab->params->max_branch);
476 htab->fromelem_size_log2 = max_branch_log2 > 4 ? max_branch_log2 - 4 : 0;
479 /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP
480 to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set
481 *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */
484 get_sym_h (struct elf_link_hash_entry **hp,
485 Elf_Internal_Sym **symp,
487 Elf_Internal_Sym **locsymsp,
488 unsigned long r_symndx,
491 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
493 if (r_symndx >= symtab_hdr->sh_info)
495 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
496 struct elf_link_hash_entry *h;
498 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
499 while (h->root.type == bfd_link_hash_indirect
500 || h->root.type == bfd_link_hash_warning)
501 h = (struct elf_link_hash_entry *) h->root.u.i.link;
511 asection *symsec = NULL;
512 if (h->root.type == bfd_link_hash_defined
513 || h->root.type == bfd_link_hash_defweak)
514 symsec = h->root.u.def.section;
520 Elf_Internal_Sym *sym;
521 Elf_Internal_Sym *locsyms = *locsymsp;
525 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
527 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
529 0, NULL, NULL, NULL);
534 sym = locsyms + r_symndx;
543 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
549 /* Create the note section if not already present. This is done early so
550 that the linker maps the sections to the right place in the output. */
553 spu_elf_create_sections (struct bfd_link_info *info)
555 struct spu_link_hash_table *htab = spu_hash_table (info);
558 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
559 if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL)
564 /* Make SPU_PTNOTE_SPUNAME section. */
571 ibfd = info->input_bfds;
572 flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
573 s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags);
575 || !bfd_set_section_alignment (ibfd, s, 4))
578 name_len = strlen (bfd_get_filename (info->output_bfd)) + 1;
579 size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4);
580 size += (name_len + 3) & -4;
582 if (!bfd_set_section_size (ibfd, s, size))
585 data = bfd_zalloc (ibfd, size);
589 bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0);
590 bfd_put_32 (ibfd, name_len, data + 4);
591 bfd_put_32 (ibfd, 1, data + 8);
592 memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME));
593 memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4),
594 bfd_get_filename (info->output_bfd), name_len);
598 if (htab->params->emit_fixups)
603 if (htab->elf.dynobj == NULL)
604 htab->elf.dynobj = ibfd;
605 ibfd = htab->elf.dynobj;
606 flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY | SEC_HAS_CONTENTS
607 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
608 s = bfd_make_section_anyway_with_flags (ibfd, ".fixup", flags);
609 if (s == NULL || !bfd_set_section_alignment (ibfd, s, 2))
617 /* qsort predicate to sort sections by vma. */
620 sort_sections (const void *a, const void *b)
622 const asection *const *s1 = a;
623 const asection *const *s2 = b;
624 bfd_signed_vma delta = (*s1)->vma - (*s2)->vma;
627 return delta < 0 ? -1 : 1;
629 return (*s1)->index - (*s2)->index;
632 /* Identify overlays in the output bfd, and number them.
633 Returns 0 on error, 1 if no overlays, 2 if overlays. */
636 spu_elf_find_overlays (struct bfd_link_info *info)
638 struct spu_link_hash_table *htab = spu_hash_table (info);
639 asection **alloc_sec;
640 unsigned int i, n, ovl_index, num_buf;
643 static const char *const entry_names[2][2] = {
644 { "__ovly_load", "__icache_br_handler" },
645 { "__ovly_return", "__icache_call_handler" }
648 if (info->output_bfd->section_count < 2)
652 = bfd_malloc (info->output_bfd->section_count * sizeof (*alloc_sec));
653 if (alloc_sec == NULL)
656 /* Pick out all the alloced sections. */
657 for (n = 0, s = info->output_bfd->sections; s != NULL; s = s->next)
658 if ((s->flags & SEC_ALLOC) != 0
659 && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL
669 /* Sort them by vma. */
670 qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections);
672 ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size;
673 if (htab->params->ovly_flavour == ovly_soft_icache)
675 unsigned int prev_buf = 0, set_id = 0;
677 /* Look for an overlapping vma to find the first overlay section. */
678 bfd_vma vma_start = 0;
680 for (i = 1; i < n; i++)
683 if (s->vma < ovl_end)
685 asection *s0 = alloc_sec[i - 1];
689 << (htab->num_lines_log2 + htab->line_size_log2)));
694 ovl_end = s->vma + s->size;
697 /* Now find any sections within the cache area. */
698 for (ovl_index = 0, num_buf = 0; i < n; i++)
701 if (s->vma >= ovl_end)
704 /* A section in an overlay area called .ovl.init is not
705 an overlay, in the sense that it might be loaded in
706 by the overlay manager, but rather the initial
707 section contents for the overlay buffer. */
708 if (strncmp (s->name, ".ovl.init", 9) != 0)
710 num_buf = ((s->vma - vma_start) >> htab->line_size_log2) + 1;
711 set_id = (num_buf == prev_buf)? set_id + 1 : 0;
714 if ((s->vma - vma_start) & (htab->params->line_size - 1))
716 info->callbacks->einfo (_("%X%P: overlay section %A "
717 "does not start on a cache line.\n"),
719 bfd_set_error (bfd_error_bad_value);
722 else if (s->size > htab->params->line_size)
724 info->callbacks->einfo (_("%X%P: overlay section %A "
725 "is larger than a cache line.\n"),
727 bfd_set_error (bfd_error_bad_value);
731 alloc_sec[ovl_index++] = s;
732 spu_elf_section_data (s)->u.o.ovl_index
733 = (set_id << htab->num_lines_log2) + num_buf;
734 spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
738 /* Ensure there are no more overlay sections. */
742 if (s->vma < ovl_end)
744 info->callbacks->einfo (_("%X%P: overlay section %A "
745 "is not in cache area.\n"),
747 bfd_set_error (bfd_error_bad_value);
751 ovl_end = s->vma + s->size;
756 /* Look for overlapping vmas. Any with overlap must be overlays.
757 Count them. Also count the number of overlay regions. */
758 for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++)
761 if (s->vma < ovl_end)
763 asection *s0 = alloc_sec[i - 1];
765 if (spu_elf_section_data (s0)->u.o.ovl_index == 0)
768 if (strncmp (s0->name, ".ovl.init", 9) != 0)
770 alloc_sec[ovl_index] = s0;
771 spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index;
772 spu_elf_section_data (s0)->u.o.ovl_buf = num_buf;
775 ovl_end = s->vma + s->size;
777 if (strncmp (s->name, ".ovl.init", 9) != 0)
779 alloc_sec[ovl_index] = s;
780 spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index;
781 spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
782 if (s0->vma != s->vma)
784 info->callbacks->einfo (_("%X%P: overlay sections %A "
785 "and %A do not start at the "
788 bfd_set_error (bfd_error_bad_value);
791 if (ovl_end < s->vma + s->size)
792 ovl_end = s->vma + s->size;
796 ovl_end = s->vma + s->size;
800 htab->num_overlays = ovl_index;
801 htab->num_buf = num_buf;
802 htab->ovl_sec = alloc_sec;
807 for (i = 0; i < 2; i++)
810 struct elf_link_hash_entry *h;
812 name = entry_names[i][htab->params->ovly_flavour];
813 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
817 if (h->root.type == bfd_link_hash_new)
819 h->root.type = bfd_link_hash_undefined;
821 h->ref_regular_nonweak = 1;
824 htab->ovly_entry[i] = h;
830 /* Non-zero to use bra in overlay stubs rather than br. */
833 #define BRA 0x30000000
834 #define BRASL 0x31000000
835 #define BR 0x32000000
836 #define BRSL 0x33000000
837 #define NOP 0x40200000
838 #define LNOP 0x00200000
839 #define ILA 0x42000000
841 /* Return true for all relative and absolute branch instructions.
849 brhnz 00100011 0.. */
852 is_branch (const unsigned char *insn)
854 return (insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0;
857 /* Return true for all indirect branch instructions.
865 bihnz 00100101 011 */
868 is_indirect_branch (const unsigned char *insn)
870 return (insn[0] & 0xef) == 0x25 && (insn[1] & 0x80) == 0;
873 /* Return true for branch hint instructions.
878 is_hint (const unsigned char *insn)
880 return (insn[0] & 0xfc) == 0x10;
883 /* True if INPUT_SECTION might need overlay stubs. */
886 maybe_needs_stubs (asection *input_section)
888 /* No stubs for debug sections and suchlike. */
889 if ((input_section->flags & SEC_ALLOC) == 0)
892 /* No stubs for link-once sections that will be discarded. */
893 if (input_section->output_section == bfd_abs_section_ptr)
896 /* Don't create stubs for .eh_frame references. */
897 if (strcmp (input_section->name, ".eh_frame") == 0)
919 /* Return non-zero if this reloc symbol should go via an overlay stub.
920 Return 2 if the stub must be in non-overlay area. */
922 static enum _stub_type
923 needs_ovl_stub (struct elf_link_hash_entry *h,
924 Elf_Internal_Sym *sym,
926 asection *input_section,
927 Elf_Internal_Rela *irela,
929 struct bfd_link_info *info)
931 struct spu_link_hash_table *htab = spu_hash_table (info);
932 enum elf_spu_reloc_type r_type;
933 unsigned int sym_type;
934 bfd_boolean branch, hint, call;
935 enum _stub_type ret = no_stub;
939 || sym_sec->output_section == bfd_abs_section_ptr
940 || spu_elf_section_data (sym_sec->output_section) == NULL)
945 /* Ensure no stubs for user supplied overlay manager syms. */
946 if (h == htab->ovly_entry[0] || h == htab->ovly_entry[1])
949 /* setjmp always goes via an overlay stub, because then the return
950 and hence the longjmp goes via __ovly_return. That magically
951 makes setjmp/longjmp between overlays work. */
952 if (strncmp (h->root.root.string, "setjmp", 6) == 0
953 && (h->root.root.string[6] == '\0' || h->root.root.string[6] == '@'))
960 sym_type = ELF_ST_TYPE (sym->st_info);
962 r_type = ELF32_R_TYPE (irela->r_info);
966 if (r_type == R_SPU_REL16 || r_type == R_SPU_ADDR16)
968 if (contents == NULL)
971 if (!bfd_get_section_contents (input_section->owner,
978 contents += irela->r_offset;
980 branch = is_branch (contents);
981 hint = is_hint (contents);
984 call = (contents[0] & 0xfd) == 0x31;
986 && sym_type != STT_FUNC
989 /* It's common for people to write assembly and forget
990 to give function symbols the right type. Handle
991 calls to such symbols, but warn so that (hopefully)
992 people will fix their code. We need the symbol
993 type to be correct to distinguish function pointer
994 initialisation from other pointer initialisations. */
995 const char *sym_name;
998 sym_name = h->root.root.string;
1001 Elf_Internal_Shdr *symtab_hdr;
1002 symtab_hdr = &elf_tdata (input_section->owner)->symtab_hdr;
1003 sym_name = bfd_elf_sym_name (input_section->owner,
1008 (*_bfd_error_handler) (_("warning: call to non-function"
1009 " symbol %s defined in %B"),
1010 sym_sec->owner, sym_name);
1016 if ((!branch && htab->params->ovly_flavour == ovly_soft_icache)
1017 || (sym_type != STT_FUNC
1018 && !(branch || hint)
1019 && (sym_sec->flags & SEC_CODE) == 0))
1022 /* Usually, symbols in non-overlay sections don't need stubs. */
1023 if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0
1024 && !htab->params->non_overlay_stubs)
1027 /* A reference from some other section to a symbol in an overlay
1028 section needs a stub. */
1029 if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index
1030 != spu_elf_section_data (input_section->output_section)->u.o.ovl_index)
1032 unsigned int lrlive = 0;
1034 lrlive = (contents[1] & 0x70) >> 4;
1036 if (!lrlive && (call || sym_type == STT_FUNC))
1037 ret = call_ovl_stub;
1039 ret = br000_ovl_stub + lrlive;
1042 /* If this insn isn't a branch then we are possibly taking the
1043 address of a function and passing it out somehow. Soft-icache code
1044 always generates inline code to do indirect branches. */
1045 if (!(branch || hint)
1046 && sym_type == STT_FUNC
1047 && htab->params->ovly_flavour != ovly_soft_icache)
1054 count_stub (struct spu_link_hash_table *htab,
1057 enum _stub_type stub_type,
1058 struct elf_link_hash_entry *h,
1059 const Elf_Internal_Rela *irela)
1061 unsigned int ovl = 0;
1062 struct got_entry *g, **head;
1065 /* If this instruction is a branch or call, we need a stub
1066 for it. One stub per function per overlay.
1067 If it isn't a branch, then we are taking the address of
1068 this function so need a stub in the non-overlay area
1069 for it. One stub per function. */
1070 if (stub_type != nonovl_stub)
1071 ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
1074 head = &h->got.glist;
1077 if (elf_local_got_ents (ibfd) == NULL)
1079 bfd_size_type amt = (elf_tdata (ibfd)->symtab_hdr.sh_info
1080 * sizeof (*elf_local_got_ents (ibfd)));
1081 elf_local_got_ents (ibfd) = bfd_zmalloc (amt);
1082 if (elf_local_got_ents (ibfd) == NULL)
1085 head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
1088 if (htab->params->ovly_flavour == ovly_soft_icache)
1090 htab->stub_count[ovl] += 1;
1096 addend = irela->r_addend;
1100 struct got_entry *gnext;
1102 for (g = *head; g != NULL; g = g->next)
1103 if (g->addend == addend && g->ovl == 0)
1108 /* Need a new non-overlay area stub. Zap other stubs. */
1109 for (g = *head; g != NULL; g = gnext)
1112 if (g->addend == addend)
1114 htab->stub_count[g->ovl] -= 1;
1122 for (g = *head; g != NULL; g = g->next)
1123 if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
1129 g = bfd_malloc (sizeof *g);
1134 g->stub_addr = (bfd_vma) -1;
1138 htab->stub_count[ovl] += 1;
1144 /* Support two sizes of overlay stubs, a slower more compact stub of two
1145 instructions, and a faster stub of four instructions.
1146 Soft-icache stubs are four or eight words. */
1149 ovl_stub_size (struct spu_elf_params *params)
1151 return 16 << params->ovly_flavour >> params->compact_stub;
1155 ovl_stub_size_log2 (struct spu_elf_params *params)
1157 return 4 + params->ovly_flavour - params->compact_stub;
1160 /* Two instruction overlay stubs look like:
1162 brsl $75,__ovly_load
1163 .word target_ovl_and_address
1165 ovl_and_address is a word with the overlay number in the top 14 bits
1166 and local store address in the bottom 18 bits.
1168 Four instruction overlay stubs look like:
1172 ila $79,target_address
1175 Software icache stubs are:
1179 .word lrlive_branchlocalstoreaddr;
1180 brasl $75,__icache_br_handler
1185 build_stub (struct bfd_link_info *info,
1188 enum _stub_type stub_type,
1189 struct elf_link_hash_entry *h,
1190 const Elf_Internal_Rela *irela,
1194 struct spu_link_hash_table *htab = spu_hash_table (info);
1195 unsigned int ovl, dest_ovl, set_id;
1196 struct got_entry *g, **head;
1198 bfd_vma addend, from, to, br_dest, patt;
1199 unsigned int lrlive;
1202 if (stub_type != nonovl_stub)
1203 ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
1206 head = &h->got.glist;
1208 head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
1212 addend = irela->r_addend;
1214 if (htab->params->ovly_flavour == ovly_soft_icache)
1216 g = bfd_malloc (sizeof *g);
1222 g->br_addr = (irela->r_offset
1223 + isec->output_offset
1224 + isec->output_section->vma);
1230 for (g = *head; g != NULL; g = g->next)
1231 if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
1236 if (g->ovl == 0 && ovl != 0)
1239 if (g->stub_addr != (bfd_vma) -1)
1243 sec = htab->stub_sec[ovl];
1244 dest += dest_sec->output_offset + dest_sec->output_section->vma;
1245 from = sec->size + sec->output_offset + sec->output_section->vma;
1246 g->stub_addr = from;
1247 to = (htab->ovly_entry[0]->root.u.def.value
1248 + htab->ovly_entry[0]->root.u.def.section->output_offset
1249 + htab->ovly_entry[0]->root.u.def.section->output_section->vma);
1251 if (((dest | to | from) & 3) != 0)
1256 dest_ovl = spu_elf_section_data (dest_sec->output_section)->u.o.ovl_index;
1258 if (htab->params->ovly_flavour == ovly_normal
1259 && !htab->params->compact_stub)
1261 bfd_put_32 (sec->owner, ILA + ((dest_ovl << 7) & 0x01ffff80) + 78,
1262 sec->contents + sec->size);
1263 bfd_put_32 (sec->owner, LNOP,
1264 sec->contents + sec->size + 4);
1265 bfd_put_32 (sec->owner, ILA + ((dest << 7) & 0x01ffff80) + 79,
1266 sec->contents + sec->size + 8);
1268 bfd_put_32 (sec->owner, BR + (((to - (from + 12)) << 5) & 0x007fff80),
1269 sec->contents + sec->size + 12);
1271 bfd_put_32 (sec->owner, BRA + ((to << 5) & 0x007fff80),
1272 sec->contents + sec->size + 12);
1274 else if (htab->params->ovly_flavour == ovly_normal
1275 && htab->params->compact_stub)
1278 bfd_put_32 (sec->owner, BRSL + (((to - from) << 5) & 0x007fff80) + 75,
1279 sec->contents + sec->size);
1281 bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
1282 sec->contents + sec->size);
1283 bfd_put_32 (sec->owner, (dest & 0x3ffff) | (dest_ovl << 18),
1284 sec->contents + sec->size + 4);
1286 else if (htab->params->ovly_flavour == ovly_soft_icache
1287 && htab->params->compact_stub)
1290 if (stub_type == nonovl_stub)
1292 else if (stub_type == call_ovl_stub)
1293 /* A brsl makes lr live and *(*sp+16) is live.
1294 Tail calls have the same liveness. */
1296 else if (!htab->params->lrlive_analysis)
1297 /* Assume stack frame and lr save. */
1299 else if (irela != NULL)
1301 /* Analyse branch instructions. */
1302 struct function_info *caller;
1305 caller = find_function (isec, irela->r_offset, info);
1306 if (caller->start == NULL)
1307 off = irela->r_offset;
1310 struct function_info *found = NULL;
1312 /* Find the earliest piece of this function that
1313 has frame adjusting instructions. We might
1314 see dynamic frame adjustment (eg. for alloca)
1315 in some later piece, but functions using
1316 alloca always set up a frame earlier. Frame
1317 setup instructions are always in one piece. */
1318 if (caller->lr_store != (bfd_vma) -1
1319 || caller->sp_adjust != (bfd_vma) -1)
1321 while (caller->start != NULL)
1323 caller = caller->start;
1324 if (caller->lr_store != (bfd_vma) -1
1325 || caller->sp_adjust != (bfd_vma) -1)
1333 if (off > caller->sp_adjust)
1335 if (off > caller->lr_store)
1336 /* Only *(*sp+16) is live. */
1339 /* If no lr save, then we must be in a
1340 leaf function with a frame.
1341 lr is still live. */
1344 else if (off > caller->lr_store)
1346 /* Between lr save and stack adjust. */
1348 /* This should never happen since prologues won't
1353 /* On entry to function. */
1356 if (stub_type != br000_ovl_stub
1357 && lrlive != stub_type - br000_ovl_stub)
1358 info->callbacks->einfo (_("%A:0x%v lrlive .brinfo (%u) differs "
1359 "from analysis (%u)\n"),
1360 isec, irela->r_offset, lrlive,
1361 stub_type - br000_ovl_stub);
1364 /* If given lrlive info via .brinfo, use it. */
1365 if (stub_type > br000_ovl_stub)
1366 lrlive = stub_type - br000_ovl_stub;
1369 to = (htab->ovly_entry[1]->root.u.def.value
1370 + htab->ovly_entry[1]->root.u.def.section->output_offset
1371 + htab->ovly_entry[1]->root.u.def.section->output_section->vma);
1373 /* The branch that uses this stub goes to stub_addr + 4. We'll
1374 set up an xor pattern that can be used by the icache manager
1375 to modify this branch to go directly to its destination. */
1377 br_dest = g->stub_addr;
1380 /* Except in the case of _SPUEAR_ stubs, the branch in
1381 question is the one in the stub itself. */
1382 BFD_ASSERT (stub_type == nonovl_stub);
1383 g->br_addr = g->stub_addr;
1387 set_id = ((dest_ovl - 1) >> htab->num_lines_log2) + 1;
1388 bfd_put_32 (sec->owner, (set_id << 18) | (dest & 0x3ffff),
1389 sec->contents + sec->size);
1390 bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
1391 sec->contents + sec->size + 4);
1392 bfd_put_32 (sec->owner, (lrlive << 29) | (g->br_addr & 0x3ffff),
1393 sec->contents + sec->size + 8);
1394 patt = dest ^ br_dest;
1395 if (irela != NULL && ELF32_R_TYPE (irela->r_info) == R_SPU_REL16)
1396 patt = (dest - g->br_addr) ^ (br_dest - g->br_addr);
1397 bfd_put_32 (sec->owner, (patt << 5) & 0x007fff80,
1398 sec->contents + sec->size + 12);
1401 /* Extra space for linked list entries. */
1407 sec->size += ovl_stub_size (htab->params);
1409 if (htab->params->emit_stub_syms)
1415 len = 8 + sizeof (".ovl_call.") - 1;
1417 len += strlen (h->root.root.string);
1422 add = (int) irela->r_addend & 0xffffffff;
1425 name = bfd_malloc (len + 1);
1429 sprintf (name, "%08x.ovl_call.", g->ovl);
1431 strcpy (name + 8 + sizeof (".ovl_call.") - 1, h->root.root.string);
1433 sprintf (name + 8 + sizeof (".ovl_call.") - 1, "%x:%x",
1434 dest_sec->id & 0xffffffff,
1435 (int) ELF32_R_SYM (irela->r_info) & 0xffffffff);
1437 sprintf (name + len - 9, "+%x", add);
1439 h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE);
1443 if (h->root.type == bfd_link_hash_new)
1445 h->root.type = bfd_link_hash_defined;
1446 h->root.u.def.section = sec;
1447 h->size = ovl_stub_size (htab->params);
1448 h->root.u.def.value = sec->size - h->size;
1452 h->ref_regular_nonweak = 1;
1453 h->forced_local = 1;
1461 /* Called via elf_link_hash_traverse to allocate stubs for any _SPUEAR_
1465 allocate_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
1467 /* Symbols starting with _SPUEAR_ need a stub because they may be
1468 invoked by the PPU. */
1469 struct bfd_link_info *info = inf;
1470 struct spu_link_hash_table *htab = spu_hash_table (info);
1473 if ((h->root.type == bfd_link_hash_defined
1474 || h->root.type == bfd_link_hash_defweak)
1476 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0
1477 && (sym_sec = h->root.u.def.section) != NULL
1478 && sym_sec->output_section != bfd_abs_section_ptr
1479 && spu_elf_section_data (sym_sec->output_section) != NULL
1480 && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
1481 || htab->params->non_overlay_stubs))
1483 return count_stub (htab, NULL, NULL, nonovl_stub, h, NULL);
1490 build_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
1492 /* Symbols starting with _SPUEAR_ need a stub because they may be
1493 invoked by the PPU. */
1494 struct bfd_link_info *info = inf;
1495 struct spu_link_hash_table *htab = spu_hash_table (info);
1498 if ((h->root.type == bfd_link_hash_defined
1499 || h->root.type == bfd_link_hash_defweak)
1501 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0
1502 && (sym_sec = h->root.u.def.section) != NULL
1503 && sym_sec->output_section != bfd_abs_section_ptr
1504 && spu_elf_section_data (sym_sec->output_section) != NULL
1505 && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
1506 || htab->params->non_overlay_stubs))
1508 return build_stub (info, NULL, NULL, nonovl_stub, h, NULL,
1509 h->root.u.def.value, sym_sec);
1515 /* Size or build stubs. */
1518 process_stubs (struct bfd_link_info *info, bfd_boolean build)
1520 struct spu_link_hash_table *htab = spu_hash_table (info);
1523 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1525 extern const bfd_target spu_elf32_vec;
1526 Elf_Internal_Shdr *symtab_hdr;
1528 Elf_Internal_Sym *local_syms = NULL;
1530 if (ibfd->xvec != &spu_elf32_vec)
1533 /* We'll need the symbol table in a second. */
1534 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1535 if (symtab_hdr->sh_info == 0)
1538 /* Walk over each section attached to the input bfd. */
1539 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
1541 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
1543 /* If there aren't any relocs, then there's nothing more to do. */
1544 if ((isec->flags & SEC_RELOC) == 0
1545 || isec->reloc_count == 0)
1548 if (!maybe_needs_stubs (isec))
1551 /* Get the relocs. */
1552 internal_relocs = _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
1554 if (internal_relocs == NULL)
1555 goto error_ret_free_local;
1557 /* Now examine each relocation. */
1558 irela = internal_relocs;
1559 irelaend = irela + isec->reloc_count;
1560 for (; irela < irelaend; irela++)
1562 enum elf_spu_reloc_type r_type;
1563 unsigned int r_indx;
1565 Elf_Internal_Sym *sym;
1566 struct elf_link_hash_entry *h;
1567 enum _stub_type stub_type;
1569 r_type = ELF32_R_TYPE (irela->r_info);
1570 r_indx = ELF32_R_SYM (irela->r_info);
1572 if (r_type >= R_SPU_max)
1574 bfd_set_error (bfd_error_bad_value);
1575 error_ret_free_internal:
1576 if (elf_section_data (isec)->relocs != internal_relocs)
1577 free (internal_relocs);
1578 error_ret_free_local:
1579 if (local_syms != NULL
1580 && (symtab_hdr->contents
1581 != (unsigned char *) local_syms))
1586 /* Determine the reloc target section. */
1587 if (!get_sym_h (&h, &sym, &sym_sec, &local_syms, r_indx, ibfd))
1588 goto error_ret_free_internal;
1590 stub_type = needs_ovl_stub (h, sym, sym_sec, isec, irela,
1592 if (stub_type == no_stub)
1594 else if (stub_type == stub_error)
1595 goto error_ret_free_internal;
1597 if (htab->stub_count == NULL)
1600 amt = (htab->num_overlays + 1) * sizeof (*htab->stub_count);
1601 htab->stub_count = bfd_zmalloc (amt);
1602 if (htab->stub_count == NULL)
1603 goto error_ret_free_internal;
1608 if (!count_stub (htab, ibfd, isec, stub_type, h, irela))
1609 goto error_ret_free_internal;
1616 dest = h->root.u.def.value;
1618 dest = sym->st_value;
1619 dest += irela->r_addend;
1620 if (!build_stub (info, ibfd, isec, stub_type, h, irela,
1622 goto error_ret_free_internal;
1626 /* We're done with the internal relocs, free them. */
1627 if (elf_section_data (isec)->relocs != internal_relocs)
1628 free (internal_relocs);
1631 if (local_syms != NULL
1632 && symtab_hdr->contents != (unsigned char *) local_syms)
1634 if (!info->keep_memory)
1637 symtab_hdr->contents = (unsigned char *) local_syms;
1644 /* Allocate space for overlay call and return stubs.
1645 Return 0 on error, 1 if no overlays, 2 otherwise. */
1648 spu_elf_size_stubs (struct bfd_link_info *info)
1650 struct spu_link_hash_table *htab;
1657 if (!process_stubs (info, FALSE))
1660 htab = spu_hash_table (info);
1661 elf_link_hash_traverse (&htab->elf, allocate_spuear_stubs, info);
1665 ibfd = info->input_bfds;
1666 if (htab->stub_count != NULL)
1668 amt = (htab->num_overlays + 1) * sizeof (*htab->stub_sec);
1669 htab->stub_sec = bfd_zmalloc (amt);
1670 if (htab->stub_sec == NULL)
1673 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
1674 | SEC_HAS_CONTENTS | SEC_IN_MEMORY);
1675 stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
1676 htab->stub_sec[0] = stub;
1678 || !bfd_set_section_alignment (ibfd, stub,
1679 ovl_stub_size_log2 (htab->params)))
1681 stub->size = htab->stub_count[0] * ovl_stub_size (htab->params);
1682 if (htab->params->ovly_flavour == ovly_soft_icache)
1683 /* Extra space for linked list entries. */
1684 stub->size += htab->stub_count[0] * 16;
1686 for (i = 0; i < htab->num_overlays; ++i)
1688 asection *osec = htab->ovl_sec[i];
1689 unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
1690 stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
1691 htab->stub_sec[ovl] = stub;
1693 || !bfd_set_section_alignment (ibfd, stub,
1694 ovl_stub_size_log2 (htab->params)))
1696 stub->size = htab->stub_count[ovl] * ovl_stub_size (htab->params);
1700 if (htab->params->ovly_flavour == ovly_soft_icache)
1702 /* Space for icache manager tables.
1703 a) Tag array, one quadword per cache line.
1704 b) Rewrite "to" list, one quadword per cache line.
1705 c) Rewrite "from" list, one byte per outgoing branch (rounded up to
1706 a power-of-two number of full quadwords) per cache line. */
1709 htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
1710 if (htab->ovtab == NULL
1711 || !bfd_set_section_alignment (ibfd, htab->ovtab, 4))
1714 htab->ovtab->size = (16 + 16 + (16 << htab->fromelem_size_log2))
1715 << htab->num_lines_log2;
1717 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1718 htab->init = bfd_make_section_anyway_with_flags (ibfd, ".ovini", flags);
1719 if (htab->init == NULL
1720 || !bfd_set_section_alignment (ibfd, htab->init, 4))
1723 htab->init->size = 16;
1725 else if (htab->stub_count == NULL)
1729 /* htab->ovtab consists of two arrays.
1739 . } _ovly_buf_table[];
1742 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1743 htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
1744 if (htab->ovtab == NULL
1745 || !bfd_set_section_alignment (ibfd, htab->ovtab, 4))
1748 htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
1751 htab->toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC);
1752 if (htab->toe == NULL
1753 || !bfd_set_section_alignment (ibfd, htab->toe, 4))
1755 htab->toe->size = 16;
1760 /* Called from ld to place overlay manager data sections. This is done
1761 after the overlay manager itself is loaded, mainly so that the
1762 linker's htab->init section is placed after any other .ovl.init
1766 spu_elf_place_overlay_data (struct bfd_link_info *info)
1768 struct spu_link_hash_table *htab = spu_hash_table (info);
1771 if (htab->stub_sec != NULL)
1773 (*htab->params->place_spu_section) (htab->stub_sec[0], NULL, ".text");
1775 for (i = 0; i < htab->num_overlays; ++i)
1777 asection *osec = htab->ovl_sec[i];
1778 unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
1779 (*htab->params->place_spu_section) (htab->stub_sec[ovl], osec, NULL);
1783 if (htab->params->ovly_flavour == ovly_soft_icache)
1784 (*htab->params->place_spu_section) (htab->init, NULL, ".ovl.init");
1786 if (htab->ovtab != NULL)
1788 const char *ovout = ".data";
1789 if (htab->params->ovly_flavour == ovly_soft_icache)
1791 (*htab->params->place_spu_section) (htab->ovtab, NULL, ovout);
1794 if (htab->toe != NULL)
1795 (*htab->params->place_spu_section) (htab->toe, NULL, ".toe");
1798 /* Functions to handle embedded spu_ovl.o object. */
1801 ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream)
1807 ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED,
1813 struct _ovl_stream *os;
1817 os = (struct _ovl_stream *) stream;
1818 max = (const char *) os->end - (const char *) os->start;
1820 if ((ufile_ptr) offset >= max)
1824 if (count > max - offset)
1825 count = max - offset;
1827 memcpy (buf, (const char *) os->start + offset, count);
1832 ovl_mgr_stat (struct bfd *abfd ATTRIBUTE_UNUSED,
1836 struct _ovl_stream *os = (struct _ovl_stream *) stream;
1838 memset (sb, 0, sizeof (*sb));
1839 sb->st_size = (const char *) os->end - (const char *) os->start;
1844 spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream)
1846 *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr",
1853 return *ovl_bfd != NULL;
1857 overlay_index (asection *sec)
1860 || sec->output_section == bfd_abs_section_ptr)
1862 return spu_elf_section_data (sec->output_section)->u.o.ovl_index;
1865 /* Define an STT_OBJECT symbol. */
1867 static struct elf_link_hash_entry *
1868 define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name)
1870 struct elf_link_hash_entry *h;
1872 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
1876 if (h->root.type != bfd_link_hash_defined
1879 h->root.type = bfd_link_hash_defined;
1880 h->root.u.def.section = htab->ovtab;
1881 h->type = STT_OBJECT;
1884 h->ref_regular_nonweak = 1;
1887 else if (h->root.u.def.section->owner != NULL)
1889 (*_bfd_error_handler) (_("%B is not allowed to define %s"),
1890 h->root.u.def.section->owner,
1891 h->root.root.string);
1892 bfd_set_error (bfd_error_bad_value);
1897 (*_bfd_error_handler) (_("you are not allowed to define %s in a script"),
1898 h->root.root.string);
1899 bfd_set_error (bfd_error_bad_value);
1906 /* Fill in all stubs and the overlay tables. */
1909 spu_elf_build_stubs (struct bfd_link_info *info)
1911 struct spu_link_hash_table *htab = spu_hash_table (info);
1912 struct elf_link_hash_entry *h;
1918 if (htab->num_overlays != 0)
1920 for (i = 0; i < 2; i++)
1922 h = htab->ovly_entry[i];
1924 && (h->root.type == bfd_link_hash_defined
1925 || h->root.type == bfd_link_hash_defweak)
1928 s = h->root.u.def.section->output_section;
1929 if (spu_elf_section_data (s)->u.o.ovl_index)
1931 (*_bfd_error_handler) (_("%s in overlay section"),
1932 h->root.root.string);
1933 bfd_set_error (bfd_error_bad_value);
1940 if (htab->stub_sec != NULL)
1942 for (i = 0; i <= htab->num_overlays; i++)
1943 if (htab->stub_sec[i]->size != 0)
1945 htab->stub_sec[i]->contents = bfd_zalloc (htab->stub_sec[i]->owner,
1946 htab->stub_sec[i]->size);
1947 if (htab->stub_sec[i]->contents == NULL)
1949 htab->stub_sec[i]->rawsize = htab->stub_sec[i]->size;
1950 htab->stub_sec[i]->size = 0;
1953 /* Fill in all the stubs. */
1954 process_stubs (info, TRUE);
1955 if (!htab->stub_err)
1956 elf_link_hash_traverse (&htab->elf, build_spuear_stubs, info);
1960 (*_bfd_error_handler) (_("overlay stub relocation overflow"));
1961 bfd_set_error (bfd_error_bad_value);
1965 for (i = 0; i <= htab->num_overlays; i++)
1967 if (htab->stub_sec[i]->size != htab->stub_sec[i]->rawsize)
1969 (*_bfd_error_handler) (_("stubs don't match calculated size"));
1970 bfd_set_error (bfd_error_bad_value);
1973 htab->stub_sec[i]->rawsize = 0;
1977 if (htab->ovtab == NULL || htab->ovtab->size == 0)
1980 htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size);
1981 if (htab->ovtab->contents == NULL)
1984 p = htab->ovtab->contents;
1985 if (htab->params->ovly_flavour == ovly_soft_icache)
1989 h = define_ovtab_symbol (htab, "__icache_tag_array");
1992 h->root.u.def.value = 0;
1993 h->size = 16 << htab->num_lines_log2;
1996 h = define_ovtab_symbol (htab, "__icache_tag_array_size");
1999 h->root.u.def.value = 16 << htab->num_lines_log2;
2000 h->root.u.def.section = bfd_abs_section_ptr;
2002 h = define_ovtab_symbol (htab, "__icache_rewrite_to");
2005 h->root.u.def.value = off;
2006 h->size = 16 << htab->num_lines_log2;
2009 h = define_ovtab_symbol (htab, "__icache_rewrite_to_size");
2012 h->root.u.def.value = 16 << htab->num_lines_log2;
2013 h->root.u.def.section = bfd_abs_section_ptr;
2015 h = define_ovtab_symbol (htab, "__icache_rewrite_from");
2018 h->root.u.def.value = off;
2019 h->size = 16 << (htab->fromelem_size_log2 + htab->num_lines_log2);
2022 h = define_ovtab_symbol (htab, "__icache_rewrite_from_size");
2025 h->root.u.def.value = 16 << (htab->fromelem_size_log2
2026 + htab->num_lines_log2);
2027 h->root.u.def.section = bfd_abs_section_ptr;
2029 h = define_ovtab_symbol (htab, "__icache_log2_fromelemsize");
2032 h->root.u.def.value = htab->fromelem_size_log2;
2033 h->root.u.def.section = bfd_abs_section_ptr;
2035 h = define_ovtab_symbol (htab, "__icache_base");
2038 h->root.u.def.value = htab->ovl_sec[0]->vma;
2039 h->root.u.def.section = bfd_abs_section_ptr;
2040 h->size = htab->num_buf << htab->line_size_log2;
2042 h = define_ovtab_symbol (htab, "__icache_linesize");
2045 h->root.u.def.value = 1 << htab->line_size_log2;
2046 h->root.u.def.section = bfd_abs_section_ptr;
2048 h = define_ovtab_symbol (htab, "__icache_log2_linesize");
2051 h->root.u.def.value = htab->line_size_log2;
2052 h->root.u.def.section = bfd_abs_section_ptr;
2054 h = define_ovtab_symbol (htab, "__icache_neg_log2_linesize");
2057 h->root.u.def.value = -htab->line_size_log2;
2058 h->root.u.def.section = bfd_abs_section_ptr;
2060 h = define_ovtab_symbol (htab, "__icache_cachesize");
2063 h->root.u.def.value = 1 << (htab->num_lines_log2 + htab->line_size_log2);
2064 h->root.u.def.section = bfd_abs_section_ptr;
2066 h = define_ovtab_symbol (htab, "__icache_log2_cachesize");
2069 h->root.u.def.value = htab->num_lines_log2 + htab->line_size_log2;
2070 h->root.u.def.section = bfd_abs_section_ptr;
2072 h = define_ovtab_symbol (htab, "__icache_neg_log2_cachesize");
2075 h->root.u.def.value = -(htab->num_lines_log2 + htab->line_size_log2);
2076 h->root.u.def.section = bfd_abs_section_ptr;
2078 if (htab->init != NULL && htab->init->size != 0)
2080 htab->init->contents = bfd_zalloc (htab->init->owner,
2082 if (htab->init->contents == NULL)
2085 h = define_ovtab_symbol (htab, "__icache_fileoff");
2088 h->root.u.def.value = 0;
2089 h->root.u.def.section = htab->init;
2095 /* Write out _ovly_table. */
2096 /* set low bit of .size to mark non-overlay area as present. */
2098 obfd = htab->ovtab->output_section->owner;
2099 for (s = obfd->sections; s != NULL; s = s->next)
2101 unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index;
2105 unsigned long off = ovl_index * 16;
2106 unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf;
2108 bfd_put_32 (htab->ovtab->owner, s->vma, p + off);
2109 bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16,
2111 /* file_off written later in spu_elf_modify_program_headers. */
2112 bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12);
2116 h = define_ovtab_symbol (htab, "_ovly_table");
2119 h->root.u.def.value = 16;
2120 h->size = htab->num_overlays * 16;
2122 h = define_ovtab_symbol (htab, "_ovly_table_end");
2125 h->root.u.def.value = htab->num_overlays * 16 + 16;
2128 h = define_ovtab_symbol (htab, "_ovly_buf_table");
2131 h->root.u.def.value = htab->num_overlays * 16 + 16;
2132 h->size = htab->num_buf * 4;
2134 h = define_ovtab_symbol (htab, "_ovly_buf_table_end");
2137 h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
2141 h = define_ovtab_symbol (htab, "_EAR_");
2144 h->root.u.def.section = htab->toe;
2145 h->root.u.def.value = 0;
2151 /* Check that all loadable section VMAs lie in the range
2152 LO .. HI inclusive, and stash some parameters for --auto-overlay. */
2155 spu_elf_check_vma (struct bfd_link_info *info)
2157 struct elf_segment_map *m;
2159 struct spu_link_hash_table *htab = spu_hash_table (info);
2160 bfd *abfd = info->output_bfd;
2161 bfd_vma hi = htab->params->local_store_hi;
2162 bfd_vma lo = htab->params->local_store_lo;
2164 htab->local_store = hi + 1 - lo;
2166 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2167 if (m->p_type == PT_LOAD)
2168 for (i = 0; i < m->count; i++)
2169 if (m->sections[i]->size != 0
2170 && (m->sections[i]->vma < lo
2171 || m->sections[i]->vma > hi
2172 || m->sections[i]->vma + m->sections[i]->size - 1 > hi))
2173 return m->sections[i];
2178 /* OFFSET in SEC (presumably) is the beginning of a function prologue.
2179 Search for stack adjusting insns, and return the sp delta.
2180 If a store of lr is found save the instruction offset to *LR_STORE.
2181 If a stack adjusting instruction is found, save that offset to
2185 find_function_stack_adjust (asection *sec,
2192 memset (reg, 0, sizeof (reg));
2193 for ( ; offset + 4 <= sec->size; offset += 4)
2195 unsigned char buf[4];
2199 /* Assume no relocs on stack adjusing insns. */
2200 if (!bfd_get_section_contents (sec->owner, sec, buf, offset, 4))
2204 ra = ((buf[2] & 0x3f) << 1) | (buf[3] >> 7);
2206 if (buf[0] == 0x24 /* stqd */)
2208 if (rt == 0 /* lr */ && ra == 1 /* sp */)
2213 /* Partly decoded immediate field. */
2214 imm = (buf[1] << 9) | (buf[2] << 1) | (buf[3] >> 7);
2216 if (buf[0] == 0x1c /* ai */)
2219 imm = (imm ^ 0x200) - 0x200;
2220 reg[rt] = reg[ra] + imm;
2222 if (rt == 1 /* sp */)
2226 *sp_adjust = offset;
2230 else if (buf[0] == 0x18 && (buf[1] & 0xe0) == 0 /* a */)
2232 int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
2234 reg[rt] = reg[ra] + reg[rb];
2239 *sp_adjust = offset;
2243 else if (buf[0] == 0x08 && (buf[1] & 0xe0) == 0 /* sf */)
2245 int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
2247 reg[rt] = reg[rb] - reg[ra];
2252 *sp_adjust = offset;
2256 else if ((buf[0] & 0xfc) == 0x40 /* il, ilh, ilhu, ila */)
2258 if (buf[0] >= 0x42 /* ila */)
2259 imm |= (buf[0] & 1) << 17;
2264 if (buf[0] == 0x40 /* il */)
2266 if ((buf[1] & 0x80) == 0)
2268 imm = (imm ^ 0x8000) - 0x8000;
2270 else if ((buf[1] & 0x80) == 0 /* ilhu */)
2276 else if (buf[0] == 0x60 && (buf[1] & 0x80) != 0 /* iohl */)
2278 reg[rt] |= imm & 0xffff;
2281 else if (buf[0] == 0x04 /* ori */)
2284 imm = (imm ^ 0x200) - 0x200;
2285 reg[rt] = reg[ra] | imm;
2288 else if (buf[0] == 0x32 && (buf[1] & 0x80) != 0 /* fsmbi */)
2290 reg[rt] = ( ((imm & 0x8000) ? 0xff000000 : 0)
2291 | ((imm & 0x4000) ? 0x00ff0000 : 0)
2292 | ((imm & 0x2000) ? 0x0000ff00 : 0)
2293 | ((imm & 0x1000) ? 0x000000ff : 0));
2296 else if (buf[0] == 0x16 /* andbi */)
2302 reg[rt] = reg[ra] & imm;
2305 else if (buf[0] == 0x33 && imm == 1 /* brsl .+4 */)
2307 /* Used in pic reg load. Say rt is trashed. Won't be used
2308 in stack adjust, but we need to continue past this branch. */
2312 else if (is_branch (buf) || is_indirect_branch (buf))
2313 /* If we hit a branch then we must be out of the prologue. */
2320 /* qsort predicate to sort symbols by section and value. */
2322 static Elf_Internal_Sym *sort_syms_syms;
2323 static asection **sort_syms_psecs;
2326 sort_syms (const void *a, const void *b)
2328 Elf_Internal_Sym *const *s1 = a;
2329 Elf_Internal_Sym *const *s2 = b;
2330 asection *sec1,*sec2;
2331 bfd_signed_vma delta;
2333 sec1 = sort_syms_psecs[*s1 - sort_syms_syms];
2334 sec2 = sort_syms_psecs[*s2 - sort_syms_syms];
2337 return sec1->index - sec2->index;
2339 delta = (*s1)->st_value - (*s2)->st_value;
2341 return delta < 0 ? -1 : 1;
2343 delta = (*s2)->st_size - (*s1)->st_size;
2345 return delta < 0 ? -1 : 1;
2347 return *s1 < *s2 ? -1 : 1;
2350 /* Allocate a struct spu_elf_stack_info with MAX_FUN struct function_info
2351 entries for section SEC. */
2353 static struct spu_elf_stack_info *
2354 alloc_stack_info (asection *sec, int max_fun)
2356 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2359 amt = sizeof (struct spu_elf_stack_info);
2360 amt += (max_fun - 1) * sizeof (struct function_info);
2361 sec_data->u.i.stack_info = bfd_zmalloc (amt);
2362 if (sec_data->u.i.stack_info != NULL)
2363 sec_data->u.i.stack_info->max_fun = max_fun;
2364 return sec_data->u.i.stack_info;
2367 /* Add a new struct function_info describing a (part of a) function
2368 starting at SYM_H. Keep the array sorted by address. */
2370 static struct function_info *
2371 maybe_insert_function (asection *sec,
2374 bfd_boolean is_func)
2376 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2377 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2383 sinfo = alloc_stack_info (sec, 20);
2390 Elf_Internal_Sym *sym = sym_h;
2391 off = sym->st_value;
2392 size = sym->st_size;
2396 struct elf_link_hash_entry *h = sym_h;
2397 off = h->root.u.def.value;
2401 for (i = sinfo->num_fun; --i >= 0; )
2402 if (sinfo->fun[i].lo <= off)
2407 /* Don't add another entry for an alias, but do update some
2409 if (sinfo->fun[i].lo == off)
2411 /* Prefer globals over local syms. */
2412 if (global && !sinfo->fun[i].global)
2414 sinfo->fun[i].global = TRUE;
2415 sinfo->fun[i].u.h = sym_h;
2418 sinfo->fun[i].is_func = TRUE;
2419 return &sinfo->fun[i];
2421 /* Ignore a zero-size symbol inside an existing function. */
2422 else if (sinfo->fun[i].hi > off && size == 0)
2423 return &sinfo->fun[i];
2426 if (sinfo->num_fun >= sinfo->max_fun)
2428 bfd_size_type amt = sizeof (struct spu_elf_stack_info);
2429 bfd_size_type old = amt;
2431 old += (sinfo->max_fun - 1) * sizeof (struct function_info);
2432 sinfo->max_fun += 20 + (sinfo->max_fun >> 1);
2433 amt += (sinfo->max_fun - 1) * sizeof (struct function_info);
2434 sinfo = bfd_realloc (sinfo, amt);
2437 memset ((char *) sinfo + old, 0, amt - old);
2438 sec_data->u.i.stack_info = sinfo;
2441 if (++i < sinfo->num_fun)
2442 memmove (&sinfo->fun[i + 1], &sinfo->fun[i],
2443 (sinfo->num_fun - i) * sizeof (sinfo->fun[i]));
2444 sinfo->fun[i].is_func = is_func;
2445 sinfo->fun[i].global = global;
2446 sinfo->fun[i].sec = sec;
2448 sinfo->fun[i].u.h = sym_h;
2450 sinfo->fun[i].u.sym = sym_h;
2451 sinfo->fun[i].lo = off;
2452 sinfo->fun[i].hi = off + size;
2453 sinfo->fun[i].lr_store = -1;
2454 sinfo->fun[i].sp_adjust = -1;
2455 sinfo->fun[i].stack = -find_function_stack_adjust (sec, off,
2456 &sinfo->fun[i].lr_store,
2457 &sinfo->fun[i].sp_adjust);
2458 sinfo->num_fun += 1;
2459 return &sinfo->fun[i];
2462 /* Return the name of FUN. */
2465 func_name (struct function_info *fun)
2469 Elf_Internal_Shdr *symtab_hdr;
2471 while (fun->start != NULL)
2475 return fun->u.h->root.root.string;
2478 if (fun->u.sym->st_name == 0)
2480 size_t len = strlen (sec->name);
2481 char *name = bfd_malloc (len + 10);
2484 sprintf (name, "%s+%lx", sec->name,
2485 (unsigned long) fun->u.sym->st_value & 0xffffffff);
2489 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2490 return bfd_elf_sym_name (ibfd, symtab_hdr, fun->u.sym, sec);
2493 /* Read the instruction at OFF in SEC. Return true iff the instruction
2494 is a nop, lnop, or stop 0 (all zero insn). */
2497 is_nop (asection *sec, bfd_vma off)
2499 unsigned char insn[4];
2501 if (off + 4 > sec->size
2502 || !bfd_get_section_contents (sec->owner, sec, insn, off, 4))
2504 if ((insn[0] & 0xbf) == 0 && (insn[1] & 0xe0) == 0x20)
2506 if (insn[0] == 0 && insn[1] == 0 && insn[2] == 0 && insn[3] == 0)
2511 /* Extend the range of FUN to cover nop padding up to LIMIT.
2512 Return TRUE iff some instruction other than a NOP was found. */
2515 insns_at_end (struct function_info *fun, bfd_vma limit)
2517 bfd_vma off = (fun->hi + 3) & -4;
2519 while (off < limit && is_nop (fun->sec, off))
2530 /* Check and fix overlapping function ranges. Return TRUE iff there
2531 are gaps in the current info we have about functions in SEC. */
2534 check_function_ranges (asection *sec, struct bfd_link_info *info)
2536 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2537 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2539 bfd_boolean gaps = FALSE;
2544 for (i = 1; i < sinfo->num_fun; i++)
2545 if (sinfo->fun[i - 1].hi > sinfo->fun[i].lo)
2547 /* Fix overlapping symbols. */
2548 const char *f1 = func_name (&sinfo->fun[i - 1]);
2549 const char *f2 = func_name (&sinfo->fun[i]);
2551 info->callbacks->einfo (_("warning: %s overlaps %s\n"), f1, f2);
2552 sinfo->fun[i - 1].hi = sinfo->fun[i].lo;
2554 else if (insns_at_end (&sinfo->fun[i - 1], sinfo->fun[i].lo))
2557 if (sinfo->num_fun == 0)
2561 if (sinfo->fun[0].lo != 0)
2563 if (sinfo->fun[sinfo->num_fun - 1].hi > sec->size)
2565 const char *f1 = func_name (&sinfo->fun[sinfo->num_fun - 1]);
2567 info->callbacks->einfo (_("warning: %s exceeds section size\n"), f1);
2568 sinfo->fun[sinfo->num_fun - 1].hi = sec->size;
2570 else if (insns_at_end (&sinfo->fun[sinfo->num_fun - 1], sec->size))
2576 /* Search current function info for a function that contains address
2577 OFFSET in section SEC. */
2579 static struct function_info *
2580 find_function (asection *sec, bfd_vma offset, struct bfd_link_info *info)
2582 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
2583 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
2587 hi = sinfo->num_fun;
2590 mid = (lo + hi) / 2;
2591 if (offset < sinfo->fun[mid].lo)
2593 else if (offset >= sinfo->fun[mid].hi)
2596 return &sinfo->fun[mid];
2598 info->callbacks->einfo (_("%A:0x%v not found in function table\n"),
2600 bfd_set_error (bfd_error_bad_value);
2604 /* Add CALLEE to CALLER call list if not already present. Return TRUE
2605 if CALLEE was new. If this function return FALSE, CALLEE should
2609 insert_callee (struct function_info *caller, struct call_info *callee)
2611 struct call_info **pp, *p;
2613 for (pp = &caller->call_list; (p = *pp) != NULL; pp = &p->next)
2614 if (p->fun == callee->fun)
2616 /* Tail calls use less stack than normal calls. Retain entry
2617 for normal call over one for tail call. */
2618 p->is_tail &= callee->is_tail;
2621 p->fun->start = NULL;
2622 p->fun->is_func = TRUE;
2624 p->count += callee->count;
2625 /* Reorder list so most recent call is first. */
2627 p->next = caller->call_list;
2628 caller->call_list = p;
2631 callee->next = caller->call_list;
2632 caller->call_list = callee;
2636 /* Copy CALL and insert the copy into CALLER. */
2639 copy_callee (struct function_info *caller, const struct call_info *call)
2641 struct call_info *callee;
2642 callee = bfd_malloc (sizeof (*callee));
2646 if (!insert_callee (caller, callee))
2651 /* We're only interested in code sections. Testing SEC_IN_MEMORY excludes
2652 overlay stub sections. */
2655 interesting_section (asection *s)
2657 return (s->output_section != bfd_abs_section_ptr
2658 && ((s->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_IN_MEMORY))
2659 == (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2663 /* Rummage through the relocs for SEC, looking for function calls.
2664 If CALL_TREE is true, fill in call graph. If CALL_TREE is false,
2665 mark destination symbols on calls as being functions. Also
2666 look at branches, which may be tail calls or go to hot/cold
2667 section part of same function. */
2670 mark_functions_via_relocs (asection *sec,
2671 struct bfd_link_info *info,
2674 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2675 Elf_Internal_Shdr *symtab_hdr;
2677 unsigned int priority = 0;
2678 static bfd_boolean warned;
2680 if (!interesting_section (sec)
2681 || sec->reloc_count == 0)
2684 internal_relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
2686 if (internal_relocs == NULL)
2689 symtab_hdr = &elf_tdata (sec->owner)->symtab_hdr;
2690 psyms = &symtab_hdr->contents;
2691 irela = internal_relocs;
2692 irelaend = irela + sec->reloc_count;
2693 for (; irela < irelaend; irela++)
2695 enum elf_spu_reloc_type r_type;
2696 unsigned int r_indx;
2698 Elf_Internal_Sym *sym;
2699 struct elf_link_hash_entry *h;
2701 bfd_boolean nonbranch, is_call;
2702 struct function_info *caller;
2703 struct call_info *callee;
2705 r_type = ELF32_R_TYPE (irela->r_info);
2706 nonbranch = r_type != R_SPU_REL16 && r_type != R_SPU_ADDR16;
2708 r_indx = ELF32_R_SYM (irela->r_info);
2709 if (!get_sym_h (&h, &sym, &sym_sec, psyms, r_indx, sec->owner))
2713 || sym_sec->output_section == bfd_abs_section_ptr)
2719 unsigned char insn[4];
2721 if (!bfd_get_section_contents (sec->owner, sec, insn,
2722 irela->r_offset, 4))
2724 if (is_branch (insn))
2726 is_call = (insn[0] & 0xfd) == 0x31;
2727 priority = insn[1] & 0x0f;
2729 priority |= insn[2];
2731 priority |= insn[3];
2733 if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2734 != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2737 info->callbacks->einfo
2738 (_("%B(%A+0x%v): call to non-code section"
2739 " %B(%A), analysis incomplete\n"),
2740 sec->owner, sec, irela->r_offset,
2741 sym_sec->owner, sym_sec);
2756 /* For --auto-overlay, count possible stubs we need for
2757 function pointer references. */
2758 unsigned int sym_type;
2762 sym_type = ELF_ST_TYPE (sym->st_info);
2763 if (sym_type == STT_FUNC)
2765 if (call_tree && spu_hash_table (info)->params->auto_overlay)
2766 spu_hash_table (info)->non_ovly_stub += 1;
2767 /* If the symbol type is STT_FUNC then this must be a
2768 function pointer initialisation. */
2771 /* Ignore data references. */
2772 if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2773 != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
2775 /* Otherwise we probably have a jump table reloc for
2776 a switch statement or some other reference to a
2781 val = h->root.u.def.value;
2783 val = sym->st_value;
2784 val += irela->r_addend;
2788 struct function_info *fun;
2790 if (irela->r_addend != 0)
2792 Elf_Internal_Sym *fake = bfd_zmalloc (sizeof (*fake));
2795 fake->st_value = val;
2797 = _bfd_elf_section_from_bfd_section (sym_sec->owner, sym_sec);
2801 fun = maybe_insert_function (sym_sec, sym, FALSE, is_call);
2803 fun = maybe_insert_function (sym_sec, h, TRUE, is_call);
2806 if (irela->r_addend != 0
2807 && fun->u.sym != sym)
2812 caller = find_function (sec, irela->r_offset, info);
2815 callee = bfd_malloc (sizeof *callee);
2819 callee->fun = find_function (sym_sec, val, info);
2820 if (callee->fun == NULL)
2822 callee->is_tail = !is_call;
2823 callee->is_pasted = FALSE;
2824 callee->broken_cycle = FALSE;
2825 callee->priority = priority;
2826 callee->count = nonbranch? 0 : 1;
2827 if (callee->fun->last_caller != sec)
2829 callee->fun->last_caller = sec;
2830 callee->fun->call_count += 1;
2832 if (!insert_callee (caller, callee))
2835 && !callee->fun->is_func
2836 && callee->fun->stack == 0)
2838 /* This is either a tail call or a branch from one part of
2839 the function to another, ie. hot/cold section. If the
2840 destination has been called by some other function then
2841 it is a separate function. We also assume that functions
2842 are not split across input files. */
2843 if (sec->owner != sym_sec->owner)
2845 callee->fun->start = NULL;
2846 callee->fun->is_func = TRUE;
2848 else if (callee->fun->start == NULL)
2850 struct function_info *caller_start = caller;
2851 while (caller_start->start)
2852 caller_start = caller_start->start;
2854 if (caller_start != callee->fun)
2855 callee->fun->start = caller_start;
2859 struct function_info *callee_start;
2860 struct function_info *caller_start;
2861 callee_start = callee->fun;
2862 while (callee_start->start)
2863 callee_start = callee_start->start;
2864 caller_start = caller;
2865 while (caller_start->start)
2866 caller_start = caller_start->start;
2867 if (caller_start != callee_start)
2869 callee->fun->start = NULL;
2870 callee->fun->is_func = TRUE;
2879 /* Handle something like .init or .fini, which has a piece of a function.
2880 These sections are pasted together to form a single function. */
2883 pasted_function (asection *sec)
2885 struct bfd_link_order *l;
2886 struct _spu_elf_section_data *sec_data;
2887 struct spu_elf_stack_info *sinfo;
2888 Elf_Internal_Sym *fake;
2889 struct function_info *fun, *fun_start;
2891 fake = bfd_zmalloc (sizeof (*fake));
2895 fake->st_size = sec->size;
2897 = _bfd_elf_section_from_bfd_section (sec->owner, sec);
2898 fun = maybe_insert_function (sec, fake, FALSE, FALSE);
2902 /* Find a function immediately preceding this section. */
2904 for (l = sec->output_section->map_head.link_order; l != NULL; l = l->next)
2906 if (l->u.indirect.section == sec)
2908 if (fun_start != NULL)
2910 struct call_info *callee = bfd_malloc (sizeof *callee);
2914 fun->start = fun_start;
2916 callee->is_tail = TRUE;
2917 callee->is_pasted = TRUE;
2918 callee->broken_cycle = FALSE;
2919 callee->priority = 0;
2921 if (!insert_callee (fun_start, callee))
2927 if (l->type == bfd_indirect_link_order
2928 && (sec_data = spu_elf_section_data (l->u.indirect.section)) != NULL
2929 && (sinfo = sec_data->u.i.stack_info) != NULL
2930 && sinfo->num_fun != 0)
2931 fun_start = &sinfo->fun[sinfo->num_fun - 1];
2934 /* Don't return an error if we did not find a function preceding this
2935 section. The section may have incorrect flags. */
2939 /* Map address ranges in code sections to functions. */
2942 discover_functions (struct bfd_link_info *info)
2946 Elf_Internal_Sym ***psym_arr;
2947 asection ***sec_arr;
2948 bfd_boolean gaps = FALSE;
2951 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2954 psym_arr = bfd_zmalloc (bfd_idx * sizeof (*psym_arr));
2955 if (psym_arr == NULL)
2957 sec_arr = bfd_zmalloc (bfd_idx * sizeof (*sec_arr));
2958 if (sec_arr == NULL)
2961 for (ibfd = info->input_bfds, bfd_idx = 0;
2963 ibfd = ibfd->link.next, bfd_idx++)
2965 extern const bfd_target spu_elf32_vec;
2966 Elf_Internal_Shdr *symtab_hdr;
2969 Elf_Internal_Sym *syms, *sy, **psyms, **psy;
2970 asection **psecs, **p;
2972 if (ibfd->xvec != &spu_elf32_vec)
2975 /* Read all the symbols. */
2976 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2977 symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
2981 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
2982 if (interesting_section (sec))
2990 if (symtab_hdr->contents != NULL)
2992 /* Don't use cached symbols since the generic ELF linker
2993 code only reads local symbols, and we need globals too. */
2994 free (symtab_hdr->contents);
2995 symtab_hdr->contents = NULL;
2997 syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, 0,
2999 symtab_hdr->contents = (void *) syms;
3003 /* Select defined function symbols that are going to be output. */
3004 psyms = bfd_malloc ((symcount + 1) * sizeof (*psyms));
3007 psym_arr[bfd_idx] = psyms;
3008 psecs = bfd_malloc (symcount * sizeof (*psecs));
3011 sec_arr[bfd_idx] = psecs;
3012 for (psy = psyms, p = psecs, sy = syms; sy < syms + symcount; ++p, ++sy)
3013 if (ELF_ST_TYPE (sy->st_info) == STT_NOTYPE
3014 || ELF_ST_TYPE (sy->st_info) == STT_FUNC)
3018 *p = s = bfd_section_from_elf_index (ibfd, sy->st_shndx);
3019 if (s != NULL && interesting_section (s))
3022 symcount = psy - psyms;
3025 /* Sort them by section and offset within section. */
3026 sort_syms_syms = syms;
3027 sort_syms_psecs = psecs;
3028 qsort (psyms, symcount, sizeof (*psyms), sort_syms);
3030 /* Now inspect the function symbols. */
3031 for (psy = psyms; psy < psyms + symcount; )
3033 asection *s = psecs[*psy - syms];
3034 Elf_Internal_Sym **psy2;
3036 for (psy2 = psy; ++psy2 < psyms + symcount; )
3037 if (psecs[*psy2 - syms] != s)
3040 if (!alloc_stack_info (s, psy2 - psy))
3045 /* First install info about properly typed and sized functions.
3046 In an ideal world this will cover all code sections, except
3047 when partitioning functions into hot and cold sections,
3048 and the horrible pasted together .init and .fini functions. */
3049 for (psy = psyms; psy < psyms + symcount; ++psy)
3052 if (ELF_ST_TYPE (sy->st_info) == STT_FUNC)
3054 asection *s = psecs[sy - syms];
3055 if (!maybe_insert_function (s, sy, FALSE, TRUE))
3060 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
3061 if (interesting_section (sec))
3062 gaps |= check_function_ranges (sec, info);
3067 /* See if we can discover more function symbols by looking at
3069 for (ibfd = info->input_bfds, bfd_idx = 0;
3071 ibfd = ibfd->link.next, bfd_idx++)
3075 if (psym_arr[bfd_idx] == NULL)
3078 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3079 if (!mark_functions_via_relocs (sec, info, FALSE))
3083 for (ibfd = info->input_bfds, bfd_idx = 0;
3085 ibfd = ibfd->link.next, bfd_idx++)
3087 Elf_Internal_Shdr *symtab_hdr;
3089 Elf_Internal_Sym *syms, *sy, **psyms, **psy;
3092 if ((psyms = psym_arr[bfd_idx]) == NULL)
3095 psecs = sec_arr[bfd_idx];
3097 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3098 syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3101 for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
3102 if (interesting_section (sec))
3103 gaps |= check_function_ranges (sec, info);
3107 /* Finally, install all globals. */
3108 for (psy = psyms; (sy = *psy) != NULL; ++psy)
3112 s = psecs[sy - syms];
3114 /* Global syms might be improperly typed functions. */
3115 if (ELF_ST_TYPE (sy->st_info) != STT_FUNC
3116 && ELF_ST_BIND (sy->st_info) == STB_GLOBAL)
3118 if (!maybe_insert_function (s, sy, FALSE, FALSE))
3124 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3126 extern const bfd_target spu_elf32_vec;
3129 if (ibfd->xvec != &spu_elf32_vec)
3132 /* Some of the symbols we've installed as marking the
3133 beginning of functions may have a size of zero. Extend
3134 the range of such functions to the beginning of the
3135 next symbol of interest. */
3136 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3137 if (interesting_section (sec))
3139 struct _spu_elf_section_data *sec_data;
3140 struct spu_elf_stack_info *sinfo;
3142 sec_data = spu_elf_section_data (sec);
3143 sinfo = sec_data->u.i.stack_info;
3144 if (sinfo != NULL && sinfo->num_fun != 0)
3147 bfd_vma hi = sec->size;
3149 for (fun_idx = sinfo->num_fun; --fun_idx >= 0; )
3151 sinfo->fun[fun_idx].hi = hi;
3152 hi = sinfo->fun[fun_idx].lo;
3155 sinfo->fun[0].lo = 0;
3157 /* No symbols in this section. Must be .init or .fini
3158 or something similar. */
3159 else if (!pasted_function (sec))
3165 for (ibfd = info->input_bfds, bfd_idx = 0;
3167 ibfd = ibfd->link.next, bfd_idx++)
3169 if (psym_arr[bfd_idx] == NULL)
3172 free (psym_arr[bfd_idx]);
3173 free (sec_arr[bfd_idx]);
3182 /* Iterate over all function_info we have collected, calling DOIT on
3183 each node if ROOT_ONLY is false. Only call DOIT on root nodes
3187 for_each_node (bfd_boolean (*doit) (struct function_info *,
3188 struct bfd_link_info *,
3190 struct bfd_link_info *info,
3196 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3198 extern const bfd_target spu_elf32_vec;
3201 if (ibfd->xvec != &spu_elf32_vec)
3204 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3206 struct _spu_elf_section_data *sec_data;
3207 struct spu_elf_stack_info *sinfo;
3209 if ((sec_data = spu_elf_section_data (sec)) != NULL
3210 && (sinfo = sec_data->u.i.stack_info) != NULL)
3213 for (i = 0; i < sinfo->num_fun; ++i)
3214 if (!root_only || !sinfo->fun[i].non_root)
3215 if (!doit (&sinfo->fun[i], info, param))
3223 /* Transfer call info attached to struct function_info entries for
3224 all of a given function's sections to the first entry. */
3227 transfer_calls (struct function_info *fun,
3228 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3229 void *param ATTRIBUTE_UNUSED)
3231 struct function_info *start = fun->start;
3235 struct call_info *call, *call_next;
3237 while (start->start != NULL)
3238 start = start->start;
3239 for (call = fun->call_list; call != NULL; call = call_next)
3241 call_next = call->next;
3242 if (!insert_callee (start, call))
3245 fun->call_list = NULL;
3250 /* Mark nodes in the call graph that are called by some other node. */
3253 mark_non_root (struct function_info *fun,
3254 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3255 void *param ATTRIBUTE_UNUSED)
3257 struct call_info *call;
3262 for (call = fun->call_list; call; call = call->next)
3264 call->fun->non_root = TRUE;
3265 mark_non_root (call->fun, 0, 0);
3270 /* Remove cycles from the call graph. Set depth of nodes. */
3273 remove_cycles (struct function_info *fun,
3274 struct bfd_link_info *info,
3277 struct call_info **callp, *call;
3278 unsigned int depth = *(unsigned int *) param;
3279 unsigned int max_depth = depth;
3283 fun->marking = TRUE;
3285 callp = &fun->call_list;
3286 while ((call = *callp) != NULL)
3288 call->max_depth = depth + !call->is_pasted;
3289 if (!call->fun->visit2)
3291 if (!remove_cycles (call->fun, info, &call->max_depth))
3293 if (max_depth < call->max_depth)
3294 max_depth = call->max_depth;
3296 else if (call->fun->marking)
3298 struct spu_link_hash_table *htab = spu_hash_table (info);
3300 if (!htab->params->auto_overlay
3301 && htab->params->stack_analysis)
3303 const char *f1 = func_name (fun);
3304 const char *f2 = func_name (call->fun);
3306 info->callbacks->info (_("Stack analysis will ignore the call "
3311 call->broken_cycle = TRUE;
3313 callp = &call->next;
3315 fun->marking = FALSE;
3316 *(unsigned int *) param = max_depth;
3320 /* Check that we actually visited all nodes in remove_cycles. If we
3321 didn't, then there is some cycle in the call graph not attached to
3322 any root node. Arbitrarily choose a node in the cycle as a new
3323 root and break the cycle. */
3326 mark_detached_root (struct function_info *fun,
3327 struct bfd_link_info *info,
3332 fun->non_root = FALSE;
3333 *(unsigned int *) param = 0;
3334 return remove_cycles (fun, info, param);
3337 /* Populate call_list for each function. */
3340 build_call_tree (struct bfd_link_info *info)
3345 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3347 extern const bfd_target spu_elf32_vec;
3350 if (ibfd->xvec != &spu_elf32_vec)
3353 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3354 if (!mark_functions_via_relocs (sec, info, TRUE))
3358 /* Transfer call info from hot/cold section part of function
3360 if (!spu_hash_table (info)->params->auto_overlay
3361 && !for_each_node (transfer_calls, info, 0, FALSE))
3364 /* Find the call graph root(s). */
3365 if (!for_each_node (mark_non_root, info, 0, FALSE))
3368 /* Remove cycles from the call graph. We start from the root node(s)
3369 so that we break cycles in a reasonable place. */
3371 if (!for_each_node (remove_cycles, info, &depth, TRUE))
3374 return for_each_node (mark_detached_root, info, &depth, FALSE);
3377 /* qsort predicate to sort calls by priority, max_depth then count. */
3380 sort_calls (const void *a, const void *b)
3382 struct call_info *const *c1 = a;
3383 struct call_info *const *c2 = b;
3386 delta = (*c2)->priority - (*c1)->priority;
3390 delta = (*c2)->max_depth - (*c1)->max_depth;
3394 delta = (*c2)->count - (*c1)->count;
3398 return (char *) c1 - (char *) c2;
3402 unsigned int max_overlay_size;
3405 /* Set linker_mark and gc_mark on any sections that we will put in
3406 overlays. These flags are used by the generic ELF linker, but we
3407 won't be continuing on to bfd_elf_final_link so it is OK to use
3408 them. linker_mark is clear before we get here. Set segment_mark
3409 on sections that are part of a pasted function (excluding the last
3412 Set up function rodata section if --overlay-rodata. We don't
3413 currently include merged string constant rodata sections since
3415 Sort the call graph so that the deepest nodes will be visited
3419 mark_overlay_section (struct function_info *fun,
3420 struct bfd_link_info *info,
3423 struct call_info *call;
3425 struct _mos_param *mos_param = param;
3426 struct spu_link_hash_table *htab = spu_hash_table (info);
3432 if (!fun->sec->linker_mark
3433 && (htab->params->ovly_flavour != ovly_soft_icache
3434 || htab->params->non_ia_text
3435 || strncmp (fun->sec->name, ".text.ia.", 9) == 0
3436 || strcmp (fun->sec->name, ".init") == 0
3437 || strcmp (fun->sec->name, ".fini") == 0))
3441 fun->sec->linker_mark = 1;
3442 fun->sec->gc_mark = 1;
3443 fun->sec->segment_mark = 0;
3444 /* Ensure SEC_CODE is set on this text section (it ought to
3445 be!), and SEC_CODE is clear on rodata sections. We use
3446 this flag to differentiate the two overlay section types. */
3447 fun->sec->flags |= SEC_CODE;
3449 size = fun->sec->size;
3450 if (htab->params->auto_overlay & OVERLAY_RODATA)
3454 /* Find the rodata section corresponding to this function's
3456 if (strcmp (fun->sec->name, ".text") == 0)
3458 name = bfd_malloc (sizeof (".rodata"));
3461 memcpy (name, ".rodata", sizeof (".rodata"));
3463 else if (strncmp (fun->sec->name, ".text.", 6) == 0)
3465 size_t len = strlen (fun->sec->name);
3466 name = bfd_malloc (len + 3);
3469 memcpy (name, ".rodata", sizeof (".rodata"));
3470 memcpy (name + 7, fun->sec->name + 5, len - 4);
3472 else if (strncmp (fun->sec->name, ".gnu.linkonce.t.", 16) == 0)
3474 size_t len = strlen (fun->sec->name) + 1;
3475 name = bfd_malloc (len);
3478 memcpy (name, fun->sec->name, len);
3484 asection *rodata = NULL;
3485 asection *group_sec = elf_section_data (fun->sec)->next_in_group;
3486 if (group_sec == NULL)
3487 rodata = bfd_get_section_by_name (fun->sec->owner, name);
3489 while (group_sec != NULL && group_sec != fun->sec)
3491 if (strcmp (group_sec->name, name) == 0)
3496 group_sec = elf_section_data (group_sec)->next_in_group;
3498 fun->rodata = rodata;
3501 size += fun->rodata->size;
3502 if (htab->params->line_size != 0
3503 && size > htab->params->line_size)
3505 size -= fun->rodata->size;
3510 fun->rodata->linker_mark = 1;
3511 fun->rodata->gc_mark = 1;
3512 fun->rodata->flags &= ~SEC_CODE;
3518 if (mos_param->max_overlay_size < size)
3519 mos_param->max_overlay_size = size;
3522 for (count = 0, call = fun->call_list; call != NULL; call = call->next)
3527 struct call_info **calls = bfd_malloc (count * sizeof (*calls));
3531 for (count = 0, call = fun->call_list; call != NULL; call = call->next)
3532 calls[count++] = call;
3534 qsort (calls, count, sizeof (*calls), sort_calls);
3536 fun->call_list = NULL;
3540 calls[count]->next = fun->call_list;
3541 fun->call_list = calls[count];
3546 for (call = fun->call_list; call != NULL; call = call->next)
3548 if (call->is_pasted)
3550 /* There can only be one is_pasted call per function_info. */
3551 BFD_ASSERT (!fun->sec->segment_mark);
3552 fun->sec->segment_mark = 1;
3554 if (!call->broken_cycle
3555 && !mark_overlay_section (call->fun, info, param))
3559 /* Don't put entry code into an overlay. The overlay manager needs
3560 a stack! Also, don't mark .ovl.init as an overlay. */
3561 if (fun->lo + fun->sec->output_offset + fun->sec->output_section->vma
3562 == info->output_bfd->start_address
3563 || strncmp (fun->sec->output_section->name, ".ovl.init", 9) == 0)
3565 fun->sec->linker_mark = 0;
3566 if (fun->rodata != NULL)
3567 fun->rodata->linker_mark = 0;
3572 /* If non-zero then unmark functions called from those within sections
3573 that we need to unmark. Unfortunately this isn't reliable since the
3574 call graph cannot know the destination of function pointer calls. */
3575 #define RECURSE_UNMARK 0
3578 asection *exclude_input_section;
3579 asection *exclude_output_section;
3580 unsigned long clearing;
3583 /* Undo some of mark_overlay_section's work. */
3586 unmark_overlay_section (struct function_info *fun,
3587 struct bfd_link_info *info,
3590 struct call_info *call;
3591 struct _uos_param *uos_param = param;
3592 unsigned int excluded = 0;
3600 if (fun->sec == uos_param->exclude_input_section
3601 || fun->sec->output_section == uos_param->exclude_output_section)
3605 uos_param->clearing += excluded;
3607 if (RECURSE_UNMARK ? uos_param->clearing : excluded)
3609 fun->sec->linker_mark = 0;
3611 fun->rodata->linker_mark = 0;
3614 for (call = fun->call_list; call != NULL; call = call->next)
3615 if (!call->broken_cycle
3616 && !unmark_overlay_section (call->fun, info, param))
3620 uos_param->clearing -= excluded;
3625 unsigned int lib_size;
3626 asection **lib_sections;
3629 /* Add sections we have marked as belonging to overlays to an array
3630 for consideration as non-overlay sections. The array consist of
3631 pairs of sections, (text,rodata), for functions in the call graph. */
3634 collect_lib_sections (struct function_info *fun,
3635 struct bfd_link_info *info,
3638 struct _cl_param *lib_param = param;
3639 struct call_info *call;
3646 if (!fun->sec->linker_mark || !fun->sec->gc_mark || fun->sec->segment_mark)
3649 size = fun->sec->size;
3651 size += fun->rodata->size;
3653 if (size <= lib_param->lib_size)
3655 *lib_param->lib_sections++ = fun->sec;
3656 fun->sec->gc_mark = 0;
3657 if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
3659 *lib_param->lib_sections++ = fun->rodata;
3660 fun->rodata->gc_mark = 0;
3663 *lib_param->lib_sections++ = NULL;
3666 for (call = fun->call_list; call != NULL; call = call->next)
3667 if (!call->broken_cycle)
3668 collect_lib_sections (call->fun, info, param);
3673 /* qsort predicate to sort sections by call count. */
3676 sort_lib (const void *a, const void *b)
3678 asection *const *s1 = a;
3679 asection *const *s2 = b;
3680 struct _spu_elf_section_data *sec_data;
3681 struct spu_elf_stack_info *sinfo;
3685 if ((sec_data = spu_elf_section_data (*s1)) != NULL
3686 && (sinfo = sec_data->u.i.stack_info) != NULL)
3689 for (i = 0; i < sinfo->num_fun; ++i)
3690 delta -= sinfo->fun[i].call_count;
3693 if ((sec_data = spu_elf_section_data (*s2)) != NULL
3694 && (sinfo = sec_data->u.i.stack_info) != NULL)
3697 for (i = 0; i < sinfo->num_fun; ++i)
3698 delta += sinfo->fun[i].call_count;
3707 /* Remove some sections from those marked to be in overlays. Choose
3708 those that are called from many places, likely library functions. */
3711 auto_ovl_lib_functions (struct bfd_link_info *info, unsigned int lib_size)
3714 asection **lib_sections;
3715 unsigned int i, lib_count;
3716 struct _cl_param collect_lib_param;
3717 struct function_info dummy_caller;
3718 struct spu_link_hash_table *htab;
3720 memset (&dummy_caller, 0, sizeof (dummy_caller));
3722 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3724 extern const bfd_target spu_elf32_vec;
3727 if (ibfd->xvec != &spu_elf32_vec)
3730 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3731 if (sec->linker_mark
3732 && sec->size < lib_size
3733 && (sec->flags & SEC_CODE) != 0)
3736 lib_sections = bfd_malloc (lib_count * 2 * sizeof (*lib_sections));
3737 if (lib_sections == NULL)
3738 return (unsigned int) -1;
3739 collect_lib_param.lib_size = lib_size;
3740 collect_lib_param.lib_sections = lib_sections;
3741 if (!for_each_node (collect_lib_sections, info, &collect_lib_param,
3743 return (unsigned int) -1;
3744 lib_count = (collect_lib_param.lib_sections - lib_sections) / 2;
3746 /* Sort sections so that those with the most calls are first. */
3748 qsort (lib_sections, lib_count, 2 * sizeof (*lib_sections), sort_lib);
3750 htab = spu_hash_table (info);
3751 for (i = 0; i < lib_count; i++)
3753 unsigned int tmp, stub_size;
3755 struct _spu_elf_section_data *sec_data;
3756 struct spu_elf_stack_info *sinfo;
3758 sec = lib_sections[2 * i];
3759 /* If this section is OK, its size must be less than lib_size. */
3761 /* If it has a rodata section, then add that too. */
3762 if (lib_sections[2 * i + 1])
3763 tmp += lib_sections[2 * i + 1]->size;
3764 /* Add any new overlay call stubs needed by the section. */
3767 && (sec_data = spu_elf_section_data (sec)) != NULL
3768 && (sinfo = sec_data->u.i.stack_info) != NULL)
3771 struct call_info *call;
3773 for (k = 0; k < sinfo->num_fun; ++k)
3774 for (call = sinfo->fun[k].call_list; call; call = call->next)
3775 if (call->fun->sec->linker_mark)
3777 struct call_info *p;
3778 for (p = dummy_caller.call_list; p; p = p->next)
3779 if (p->fun == call->fun)
3782 stub_size += ovl_stub_size (htab->params);
3785 if (tmp + stub_size < lib_size)
3787 struct call_info **pp, *p;
3789 /* This section fits. Mark it as non-overlay. */
3790 lib_sections[2 * i]->linker_mark = 0;
3791 if (lib_sections[2 * i + 1])
3792 lib_sections[2 * i + 1]->linker_mark = 0;
3793 lib_size -= tmp + stub_size;
3794 /* Call stubs to the section we just added are no longer
3796 pp = &dummy_caller.call_list;
3797 while ((p = *pp) != NULL)
3798 if (!p->fun->sec->linker_mark)
3800 lib_size += ovl_stub_size (htab->params);
3806 /* Add new call stubs to dummy_caller. */
3807 if ((sec_data = spu_elf_section_data (sec)) != NULL
3808 && (sinfo = sec_data->u.i.stack_info) != NULL)
3811 struct call_info *call;
3813 for (k = 0; k < sinfo->num_fun; ++k)
3814 for (call = sinfo->fun[k].call_list;
3817 if (call->fun->sec->linker_mark)
3819 struct call_info *callee;
3820 callee = bfd_malloc (sizeof (*callee));
3822 return (unsigned int) -1;
3824 if (!insert_callee (&dummy_caller, callee))
3830 while (dummy_caller.call_list != NULL)
3832 struct call_info *call = dummy_caller.call_list;
3833 dummy_caller.call_list = call->next;
3836 for (i = 0; i < 2 * lib_count; i++)
3837 if (lib_sections[i])
3838 lib_sections[i]->gc_mark = 1;
3839 free (lib_sections);
3843 /* Build an array of overlay sections. The deepest node's section is
3844 added first, then its parent node's section, then everything called
3845 from the parent section. The idea being to group sections to
3846 minimise calls between different overlays. */
3849 collect_overlays (struct function_info *fun,
3850 struct bfd_link_info *info,
3853 struct call_info *call;
3854 bfd_boolean added_fun;
3855 asection ***ovly_sections = param;
3861 for (call = fun->call_list; call != NULL; call = call->next)
3862 if (!call->is_pasted && !call->broken_cycle)
3864 if (!collect_overlays (call->fun, info, ovly_sections))
3870 if (fun->sec->linker_mark && fun->sec->gc_mark)
3872 fun->sec->gc_mark = 0;
3873 *(*ovly_sections)++ = fun->sec;
3874 if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
3876 fun->rodata->gc_mark = 0;
3877 *(*ovly_sections)++ = fun->rodata;
3880 *(*ovly_sections)++ = NULL;
3883 /* Pasted sections must stay with the first section. We don't
3884 put pasted sections in the array, just the first section.
3885 Mark subsequent sections as already considered. */
3886 if (fun->sec->segment_mark)
3888 struct function_info *call_fun = fun;
3891 for (call = call_fun->call_list; call != NULL; call = call->next)
3892 if (call->is_pasted)
3894 call_fun = call->fun;
3895 call_fun->sec->gc_mark = 0;
3896 if (call_fun->rodata)
3897 call_fun->rodata->gc_mark = 0;
3903 while (call_fun->sec->segment_mark);
3907 for (call = fun->call_list; call != NULL; call = call->next)
3908 if (!call->broken_cycle
3909 && !collect_overlays (call->fun, info, ovly_sections))
3914 struct _spu_elf_section_data *sec_data;
3915 struct spu_elf_stack_info *sinfo;
3917 if ((sec_data = spu_elf_section_data (fun->sec)) != NULL
3918 && (sinfo = sec_data->u.i.stack_info) != NULL)
3921 for (i = 0; i < sinfo->num_fun; ++i)
3922 if (!collect_overlays (&sinfo->fun[i], info, ovly_sections))
3930 struct _sum_stack_param {
3932 size_t overall_stack;
3933 bfd_boolean emit_stack_syms;
3936 /* Descend the call graph for FUN, accumulating total stack required. */
3939 sum_stack (struct function_info *fun,
3940 struct bfd_link_info *info,
3943 struct call_info *call;
3944 struct function_info *max;
3945 size_t stack, cum_stack;
3947 bfd_boolean has_call;
3948 struct _sum_stack_param *sum_stack_param = param;
3949 struct spu_link_hash_table *htab;
3951 cum_stack = fun->stack;
3952 sum_stack_param->cum_stack = cum_stack;
3958 for (call = fun->call_list; call; call = call->next)
3960 if (call->broken_cycle)
3962 if (!call->is_pasted)
3964 if (!sum_stack (call->fun, info, sum_stack_param))
3966 stack = sum_stack_param->cum_stack;
3967 /* Include caller stack for normal calls, don't do so for
3968 tail calls. fun->stack here is local stack usage for
3970 if (!call->is_tail || call->is_pasted || call->fun->start != NULL)
3971 stack += fun->stack;
3972 if (cum_stack < stack)
3979 sum_stack_param->cum_stack = cum_stack;
3981 /* Now fun->stack holds cumulative stack. */
3982 fun->stack = cum_stack;
3986 && sum_stack_param->overall_stack < cum_stack)
3987 sum_stack_param->overall_stack = cum_stack;
3989 htab = spu_hash_table (info);
3990 if (htab->params->auto_overlay)
3993 f1 = func_name (fun);
3994 if (htab->params->stack_analysis)
3997 info->callbacks->info (_(" %s: 0x%v\n"), f1, (bfd_vma) cum_stack);
3998 info->callbacks->minfo (_("%s: 0x%v 0x%v\n"),
3999 f1, (bfd_vma) stack, (bfd_vma) cum_stack);
4003 info->callbacks->minfo (_(" calls:\n"));
4004 for (call = fun->call_list; call; call = call->next)
4005 if (!call->is_pasted && !call->broken_cycle)
4007 const char *f2 = func_name (call->fun);
4008 const char *ann1 = call->fun == max ? "*" : " ";
4009 const char *ann2 = call->is_tail ? "t" : " ";
4011 info->callbacks->minfo (_(" %s%s %s\n"), ann1, ann2, f2);
4016 if (sum_stack_param->emit_stack_syms)
4018 char *name = bfd_malloc (18 + strlen (f1));
4019 struct elf_link_hash_entry *h;
4024 if (fun->global || ELF_ST_BIND (fun->u.sym->st_info) == STB_GLOBAL)
4025 sprintf (name, "__stack_%s", f1);
4027 sprintf (name, "__stack_%x_%s", fun->sec->id & 0xffffffff, f1);
4029 h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE);
4032 && (h->root.type == bfd_link_hash_new
4033 || h->root.type == bfd_link_hash_undefined
4034 || h->root.type == bfd_link_hash_undefweak))
4036 h->root.type = bfd_link_hash_defined;
4037 h->root.u.def.section = bfd_abs_section_ptr;
4038 h->root.u.def.value = cum_stack;
4043 h->ref_regular_nonweak = 1;
4044 h->forced_local = 1;
4052 /* SEC is part of a pasted function. Return the call_info for the
4053 next section of this function. */
4055 static struct call_info *
4056 find_pasted_call (asection *sec)
4058 struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
4059 struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
4060 struct call_info *call;
4063 for (k = 0; k < sinfo->num_fun; ++k)
4064 for (call = sinfo->fun[k].call_list; call != NULL; call = call->next)
4065 if (call->is_pasted)
4071 /* qsort predicate to sort bfds by file name. */
4074 sort_bfds (const void *a, const void *b)
4076 bfd *const *abfd1 = a;
4077 bfd *const *abfd2 = b;
4079 return filename_cmp ((*abfd1)->filename, (*abfd2)->filename);
4083 print_one_overlay_section (FILE *script,
4086 unsigned int ovlynum,
4087 unsigned int *ovly_map,
4088 asection **ovly_sections,
4089 struct bfd_link_info *info)
4093 for (j = base; j < count && ovly_map[j] == ovlynum; j++)
4095 asection *sec = ovly_sections[2 * j];
4097 if (fprintf (script, " %s%c%s (%s)\n",
4098 (sec->owner->my_archive != NULL
4099 ? sec->owner->my_archive->filename : ""),
4100 info->path_separator,
4101 sec->owner->filename,
4104 if (sec->segment_mark)
4106 struct call_info *call = find_pasted_call (sec);
4107 while (call != NULL)
4109 struct function_info *call_fun = call->fun;
4110 sec = call_fun->sec;
4111 if (fprintf (script, " %s%c%s (%s)\n",
4112 (sec->owner->my_archive != NULL
4113 ? sec->owner->my_archive->filename : ""),
4114 info->path_separator,
4115 sec->owner->filename,
4118 for (call = call_fun->call_list; call; call = call->next)
4119 if (call->is_pasted)
4125 for (j = base; j < count && ovly_map[j] == ovlynum; j++)
4127 asection *sec = ovly_sections[2 * j + 1];
4129 && fprintf (script, " %s%c%s (%s)\n",
4130 (sec->owner->my_archive != NULL
4131 ? sec->owner->my_archive->filename : ""),
4132 info->path_separator,
4133 sec->owner->filename,
4137 sec = ovly_sections[2 * j];
4138 if (sec->segment_mark)
4140 struct call_info *call = find_pasted_call (sec);
4141 while (call != NULL)
4143 struct function_info *call_fun = call->fun;
4144 sec = call_fun->rodata;
4146 && fprintf (script, " %s%c%s (%s)\n",
4147 (sec->owner->my_archive != NULL
4148 ? sec->owner->my_archive->filename : ""),
4149 info->path_separator,
4150 sec->owner->filename,
4153 for (call = call_fun->call_list; call; call = call->next)
4154 if (call->is_pasted)
4163 /* Handle --auto-overlay. */
4166 spu_elf_auto_overlay (struct bfd_link_info *info)
4170 struct elf_segment_map *m;
4171 unsigned int fixed_size, lo, hi;
4172 unsigned int reserved;
4173 struct spu_link_hash_table *htab;
4174 unsigned int base, i, count, bfd_count;
4175 unsigned int region, ovlynum;
4176 asection **ovly_sections, **ovly_p;
4177 unsigned int *ovly_map;
4179 unsigned int total_overlay_size, overlay_size;
4180 const char *ovly_mgr_entry;
4181 struct elf_link_hash_entry *h;
4182 struct _mos_param mos_param;
4183 struct _uos_param uos_param;
4184 struct function_info dummy_caller;
4186 /* Find the extents of our loadable image. */
4187 lo = (unsigned int) -1;
4189 for (m = elf_seg_map (info->output_bfd); m != NULL; m = m->next)
4190 if (m->p_type == PT_LOAD)
4191 for (i = 0; i < m->count; i++)
4192 if (m->sections[i]->size != 0)
4194 if (m->sections[i]->vma < lo)
4195 lo = m->sections[i]->vma;
4196 if (m->sections[i]->vma + m->sections[i]->size - 1 > hi)
4197 hi = m->sections[i]->vma + m->sections[i]->size - 1;
4199 fixed_size = hi + 1 - lo;
4201 if (!discover_functions (info))
4204 if (!build_call_tree (info))
4207 htab = spu_hash_table (info);
4208 reserved = htab->params->auto_overlay_reserved;
4211 struct _sum_stack_param sum_stack_param;
4213 sum_stack_param.emit_stack_syms = 0;
4214 sum_stack_param.overall_stack = 0;
4215 if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE))
4217 reserved = (sum_stack_param.overall_stack
4218 + htab->params->extra_stack_space);
4221 /* No need for overlays if everything already fits. */
4222 if (fixed_size + reserved <= htab->local_store
4223 && htab->params->ovly_flavour != ovly_soft_icache)
4225 htab->params->auto_overlay = 0;
4229 uos_param.exclude_input_section = 0;
4230 uos_param.exclude_output_section
4231 = bfd_get_section_by_name (info->output_bfd, ".interrupt");
4233 ovly_mgr_entry = "__ovly_load";
4234 if (htab->params->ovly_flavour == ovly_soft_icache)
4235 ovly_mgr_entry = "__icache_br_handler";
4236 h = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
4237 FALSE, FALSE, FALSE);
4239 && (h->root.type == bfd_link_hash_defined
4240 || h->root.type == bfd_link_hash_defweak)
4243 /* We have a user supplied overlay manager. */
4244 uos_param.exclude_input_section = h->root.u.def.section;
4248 /* If no user overlay manager, spu_elf_load_ovl_mgr will add our
4249 builtin version to .text, and will adjust .text size. */
4250 fixed_size += (*htab->params->spu_elf_load_ovl_mgr) ();
4253 /* Mark overlay sections, and find max overlay section size. */
4254 mos_param.max_overlay_size = 0;
4255 if (!for_each_node (mark_overlay_section, info, &mos_param, TRUE))
4258 /* We can't put the overlay manager or interrupt routines in
4260 uos_param.clearing = 0;
4261 if ((uos_param.exclude_input_section
4262 || uos_param.exclude_output_section)
4263 && !for_each_node (unmark_overlay_section, info, &uos_param, TRUE))
4267 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4269 bfd_arr = bfd_malloc (bfd_count * sizeof (*bfd_arr));
4270 if (bfd_arr == NULL)
4273 /* Count overlay sections, and subtract their sizes from "fixed_size". */
4276 total_overlay_size = 0;
4277 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4279 extern const bfd_target spu_elf32_vec;
4281 unsigned int old_count;
4283 if (ibfd->xvec != &spu_elf32_vec)
4287 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4288 if (sec->linker_mark)
4290 if ((sec->flags & SEC_CODE) != 0)
4292 fixed_size -= sec->size;
4293 total_overlay_size += sec->size;
4295 else if ((sec->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)
4296 && sec->output_section->owner == info->output_bfd
4297 && strncmp (sec->output_section->name, ".ovl.init", 9) == 0)
4298 fixed_size -= sec->size;
4299 if (count != old_count)
4300 bfd_arr[bfd_count++] = ibfd;
4303 /* Since the overlay link script selects sections by file name and
4304 section name, ensure that file names are unique. */
4307 bfd_boolean ok = TRUE;
4309 qsort (bfd_arr, bfd_count, sizeof (*bfd_arr), sort_bfds);
4310 for (i = 1; i < bfd_count; ++i)
4311 if (filename_cmp (bfd_arr[i - 1]->filename, bfd_arr[i]->filename) == 0)
4313 if (bfd_arr[i - 1]->my_archive == bfd_arr[i]->my_archive)
4315 if (bfd_arr[i - 1]->my_archive && bfd_arr[i]->my_archive)
4316 info->callbacks->einfo (_("%s duplicated in %s\n"),
4317 bfd_arr[i]->filename,
4318 bfd_arr[i]->my_archive->filename);
4320 info->callbacks->einfo (_("%s duplicated\n"),
4321 bfd_arr[i]->filename);
4327 info->callbacks->einfo (_("sorry, no support for duplicate "
4328 "object files in auto-overlay script\n"));
4329 bfd_set_error (bfd_error_bad_value);
4335 fixed_size += reserved;
4336 fixed_size += htab->non_ovly_stub * ovl_stub_size (htab->params);
4337 if (fixed_size + mos_param.max_overlay_size <= htab->local_store)
4339 if (htab->params->ovly_flavour == ovly_soft_icache)
4341 /* Stubs in the non-icache area are bigger. */
4342 fixed_size += htab->non_ovly_stub * 16;
4343 /* Space for icache manager tables.
4344 a) Tag array, one quadword per cache line.
4345 - word 0: ia address of present line, init to zero. */
4346 fixed_size += 16 << htab->num_lines_log2;
4347 /* b) Rewrite "to" list, one quadword per cache line. */
4348 fixed_size += 16 << htab->num_lines_log2;
4349 /* c) Rewrite "from" list, one byte per outgoing branch (rounded up
4350 to a power-of-two number of full quadwords) per cache line. */
4351 fixed_size += 16 << (htab->fromelem_size_log2
4352 + htab->num_lines_log2);
4353 /* d) Pointer to __ea backing store (toe), 1 quadword. */
4358 /* Guess number of overlays. Assuming overlay buffer is on
4359 average only half full should be conservative. */
4360 ovlynum = (total_overlay_size * 2 * htab->params->num_lines
4361 / (htab->local_store - fixed_size));
4362 /* Space for _ovly_table[], _ovly_buf_table[] and toe. */
4363 fixed_size += ovlynum * 16 + 16 + 4 + 16;
4367 if (fixed_size + mos_param.max_overlay_size > htab->local_store)
4368 info->callbacks->einfo (_("non-overlay size of 0x%v plus maximum overlay "
4369 "size of 0x%v exceeds local store\n"),
4370 (bfd_vma) fixed_size,
4371 (bfd_vma) mos_param.max_overlay_size);
4373 /* Now see if we should put some functions in the non-overlay area. */
4374 else if (fixed_size < htab->params->auto_overlay_fixed)
4376 unsigned int max_fixed, lib_size;
4378 max_fixed = htab->local_store - mos_param.max_overlay_size;
4379 if (max_fixed > htab->params->auto_overlay_fixed)
4380 max_fixed = htab->params->auto_overlay_fixed;
4381 lib_size = max_fixed - fixed_size;
4382 lib_size = auto_ovl_lib_functions (info, lib_size);
4383 if (lib_size == (unsigned int) -1)
4385 fixed_size = max_fixed - lib_size;
4388 /* Build an array of sections, suitably sorted to place into
4390 ovly_sections = bfd_malloc (2 * count * sizeof (*ovly_sections));
4391 if (ovly_sections == NULL)
4393 ovly_p = ovly_sections;
4394 if (!for_each_node (collect_overlays, info, &ovly_p, TRUE))
4396 count = (size_t) (ovly_p - ovly_sections) / 2;
4397 ovly_map = bfd_malloc (count * sizeof (*ovly_map));
4398 if (ovly_map == NULL)
4401 memset (&dummy_caller, 0, sizeof (dummy_caller));
4402 overlay_size = (htab->local_store - fixed_size) / htab->params->num_lines;
4403 if (htab->params->line_size != 0)
4404 overlay_size = htab->params->line_size;
4407 while (base < count)
4409 unsigned int size = 0, rosize = 0, roalign = 0;
4411 for (i = base; i < count; i++)
4413 asection *sec, *rosec;
4414 unsigned int tmp, rotmp;
4415 unsigned int num_stubs;
4416 struct call_info *call, *pasty;
4417 struct _spu_elf_section_data *sec_data;
4418 struct spu_elf_stack_info *sinfo;
4421 /* See whether we can add this section to the current
4422 overlay without overflowing our overlay buffer. */
4423 sec = ovly_sections[2 * i];
4424 tmp = align_power (size, sec->alignment_power) + sec->size;
4426 rosec = ovly_sections[2 * i + 1];
4429 rotmp = align_power (rotmp, rosec->alignment_power) + rosec->size;
4430 if (roalign < rosec->alignment_power)
4431 roalign = rosec->alignment_power;
4433 if (align_power (tmp, roalign) + rotmp > overlay_size)
4435 if (sec->segment_mark)
4437 /* Pasted sections must stay together, so add their
4439 pasty = find_pasted_call (sec);
4440 while (pasty != NULL)
4442 struct function_info *call_fun = pasty->fun;
4443 tmp = (align_power (tmp, call_fun->sec->alignment_power)
4444 + call_fun->sec->size);
4445 if (call_fun->rodata)
4447 rotmp = (align_power (rotmp,
4448 call_fun->rodata->alignment_power)
4449 + call_fun->rodata->size);
4450 if (roalign < rosec->alignment_power)
4451 roalign = rosec->alignment_power;
4453 for (pasty = call_fun->call_list; pasty; pasty = pasty->next)
4454 if (pasty->is_pasted)
4458 if (align_power (tmp, roalign) + rotmp > overlay_size)
4461 /* If we add this section, we might need new overlay call
4462 stubs. Add any overlay section calls to dummy_call. */
4464 sec_data = spu_elf_section_data (sec);
4465 sinfo = sec_data->u.i.stack_info;
4466 for (k = 0; k < (unsigned) sinfo->num_fun; ++k)
4467 for (call = sinfo->fun[k].call_list; call; call = call->next)
4468 if (call->is_pasted)
4470 BFD_ASSERT (pasty == NULL);
4473 else if (call->fun->sec->linker_mark)
4475 if (!copy_callee (&dummy_caller, call))
4478 while (pasty != NULL)
4480 struct function_info *call_fun = pasty->fun;
4482 for (call = call_fun->call_list; call; call = call->next)
4483 if (call->is_pasted)
4485 BFD_ASSERT (pasty == NULL);
4488 else if (!copy_callee (&dummy_caller, call))
4492 /* Calculate call stub size. */
4494 for (call = dummy_caller.call_list; call; call = call->next)
4496 unsigned int stub_delta = 1;
4498 if (htab->params->ovly_flavour == ovly_soft_icache)
4499 stub_delta = call->count;
4500 num_stubs += stub_delta;
4502 /* If the call is within this overlay, we won't need a
4504 for (k = base; k < i + 1; k++)
4505 if (call->fun->sec == ovly_sections[2 * k])
4507 num_stubs -= stub_delta;
4511 if (htab->params->ovly_flavour == ovly_soft_icache
4512 && num_stubs > htab->params->max_branch)
4514 if (align_power (tmp, roalign) + rotmp
4515 + num_stubs * ovl_stub_size (htab->params) > overlay_size)
4523 info->callbacks->einfo (_("%B:%A%s exceeds overlay size\n"),
4524 ovly_sections[2 * i]->owner,
4525 ovly_sections[2 * i],
4526 ovly_sections[2 * i + 1] ? " + rodata" : "");
4527 bfd_set_error (bfd_error_bad_value);
4531 while (dummy_caller.call_list != NULL)
4533 struct call_info *call = dummy_caller.call_list;
4534 dummy_caller.call_list = call->next;
4540 ovly_map[base++] = ovlynum;
4543 script = htab->params->spu_elf_open_overlay_script ();
4545 if (htab->params->ovly_flavour == ovly_soft_icache)
4547 if (fprintf (script, "SECTIONS\n{\n") <= 0)
4550 if (fprintf (script,
4551 " . = ALIGN (%u);\n"
4552 " .ovl.init : { *(.ovl.init) }\n"
4553 " . = ABSOLUTE (ADDR (.ovl.init));\n",
4554 htab->params->line_size) <= 0)
4559 while (base < count)
4561 unsigned int indx = ovlynum - 1;
4562 unsigned int vma, lma;
4564 vma = (indx & (htab->params->num_lines - 1)) << htab->line_size_log2;
4565 lma = vma + (((indx >> htab->num_lines_log2) + 1) << 18);
4567 if (fprintf (script, " .ovly%u ABSOLUTE (ADDR (.ovl.init)) + %u "
4568 ": AT (LOADADDR (.ovl.init) + %u) {\n",
4569 ovlynum, vma, lma) <= 0)
4572 base = print_one_overlay_section (script, base, count, ovlynum,
4573 ovly_map, ovly_sections, info);
4574 if (base == (unsigned) -1)
4577 if (fprintf (script, " }\n") <= 0)
4583 if (fprintf (script, " . = ABSOLUTE (ADDR (.ovl.init)) + %u;\n",
4584 1 << (htab->num_lines_log2 + htab->line_size_log2)) <= 0)
4587 if (fprintf (script, "}\nINSERT AFTER .toe;\n") <= 0)
4592 if (fprintf (script, "SECTIONS\n{\n") <= 0)
4595 if (fprintf (script,
4596 " . = ALIGN (16);\n"
4597 " .ovl.init : { *(.ovl.init) }\n"
4598 " . = ABSOLUTE (ADDR (.ovl.init));\n") <= 0)
4601 for (region = 1; region <= htab->params->num_lines; region++)
4605 while (base < count && ovly_map[base] < ovlynum)
4613 /* We need to set lma since we are overlaying .ovl.init. */
4614 if (fprintf (script,
4615 " OVERLAY : AT (ALIGN (LOADADDR (.ovl.init) + SIZEOF (.ovl.init), 16))\n {\n") <= 0)
4620 if (fprintf (script, " OVERLAY :\n {\n") <= 0)
4624 while (base < count)
4626 if (fprintf (script, " .ovly%u {\n", ovlynum) <= 0)
4629 base = print_one_overlay_section (script, base, count, ovlynum,
4630 ovly_map, ovly_sections, info);
4631 if (base == (unsigned) -1)
4634 if (fprintf (script, " }\n") <= 0)
4637 ovlynum += htab->params->num_lines;
4638 while (base < count && ovly_map[base] < ovlynum)
4642 if (fprintf (script, " }\n") <= 0)
4646 if (fprintf (script, "}\nINSERT BEFORE .text;\n") <= 0)
4651 free (ovly_sections);
4653 if (fclose (script) != 0)
4656 if (htab->params->auto_overlay & AUTO_RELINK)
4657 (*htab->params->spu_elf_relink) ();
4662 bfd_set_error (bfd_error_system_call);
4664 info->callbacks->einfo ("%F%P: auto overlay error: %E\n");
4668 /* Provide an estimate of total stack required. */
4671 spu_elf_stack_analysis (struct bfd_link_info *info)
4673 struct spu_link_hash_table *htab;
4674 struct _sum_stack_param sum_stack_param;
4676 if (!discover_functions (info))
4679 if (!build_call_tree (info))
4682 htab = spu_hash_table (info);
4683 if (htab->params->stack_analysis)
4685 info->callbacks->info (_("Stack size for call graph root nodes.\n"));
4686 info->callbacks->minfo (_("\nStack size for functions. "
4687 "Annotations: '*' max stack, 't' tail call\n"));
4690 sum_stack_param.emit_stack_syms = htab->params->emit_stack_syms;
4691 sum_stack_param.overall_stack = 0;
4692 if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE))
4695 if (htab->params->stack_analysis)
4696 info->callbacks->info (_("Maximum stack required is 0x%v\n"),
4697 (bfd_vma) sum_stack_param.overall_stack);
4701 /* Perform a final link. */
4704 spu_elf_final_link (bfd *output_bfd, struct bfd_link_info *info)
4706 struct spu_link_hash_table *htab = spu_hash_table (info);
4708 if (htab->params->auto_overlay)
4709 spu_elf_auto_overlay (info);
4711 if ((htab->params->stack_analysis
4712 || (htab->params->ovly_flavour == ovly_soft_icache
4713 && htab->params->lrlive_analysis))
4714 && !spu_elf_stack_analysis (info))
4715 info->callbacks->einfo ("%X%P: stack/lrlive analysis error: %E\n");
4717 if (!spu_elf_build_stubs (info))
4718 info->callbacks->einfo ("%F%P: can not build overlay stubs: %E\n");
4720 return bfd_elf_final_link (output_bfd, info);
4723 /* Called when not normally emitting relocs, ie. !info->relocatable
4724 and !info->emitrelocations. Returns a count of special relocs
4725 that need to be emitted. */
4728 spu_elf_count_relocs (struct bfd_link_info *info, asection *sec)
4730 Elf_Internal_Rela *relocs;
4731 unsigned int count = 0;
4733 relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
4737 Elf_Internal_Rela *rel;
4738 Elf_Internal_Rela *relend = relocs + sec->reloc_count;
4740 for (rel = relocs; rel < relend; rel++)
4742 int r_type = ELF32_R_TYPE (rel->r_info);
4743 if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
4747 if (elf_section_data (sec)->relocs != relocs)
4754 /* Functions for adding fixup records to .fixup */
4756 #define FIXUP_RECORD_SIZE 4
4758 #define FIXUP_PUT(output_bfd,htab,index,addr) \
4759 bfd_put_32 (output_bfd, addr, \
4760 htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
4761 #define FIXUP_GET(output_bfd,htab,index) \
4762 bfd_get_32 (output_bfd, \
4763 htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
4765 /* Store OFFSET in .fixup. This assumes it will be called with an
4766 increasing OFFSET. When this OFFSET fits with the last base offset,
4767 it just sets a bit, otherwise it adds a new fixup record. */
4769 spu_elf_emit_fixup (bfd * output_bfd, struct bfd_link_info *info,
4772 struct spu_link_hash_table *htab = spu_hash_table (info);
4773 asection *sfixup = htab->sfixup;
4774 bfd_vma qaddr = offset & ~(bfd_vma) 15;
4775 bfd_vma bit = ((bfd_vma) 8) >> ((offset & 15) >> 2);
4776 if (sfixup->reloc_count == 0)
4778 FIXUP_PUT (output_bfd, htab, 0, qaddr | bit);
4779 sfixup->reloc_count++;
4783 bfd_vma base = FIXUP_GET (output_bfd, htab, sfixup->reloc_count - 1);
4784 if (qaddr != (base & ~(bfd_vma) 15))
4786 if ((sfixup->reloc_count + 1) * FIXUP_RECORD_SIZE > sfixup->size)
4787 (*_bfd_error_handler) (_("fatal error while creating .fixup"));
4788 FIXUP_PUT (output_bfd, htab, sfixup->reloc_count, qaddr | bit);
4789 sfixup->reloc_count++;
4792 FIXUP_PUT (output_bfd, htab, sfixup->reloc_count - 1, base | bit);
4796 /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */
4799 spu_elf_relocate_section (bfd *output_bfd,
4800 struct bfd_link_info *info,
4802 asection *input_section,
4804 Elf_Internal_Rela *relocs,
4805 Elf_Internal_Sym *local_syms,
4806 asection **local_sections)
4808 Elf_Internal_Shdr *symtab_hdr;
4809 struct elf_link_hash_entry **sym_hashes;
4810 Elf_Internal_Rela *rel, *relend;
4811 struct spu_link_hash_table *htab;
4814 bfd_boolean emit_these_relocs = FALSE;
4815 bfd_boolean is_ea_sym;
4817 unsigned int iovl = 0;
4819 htab = spu_hash_table (info);
4820 stubs = (htab->stub_sec != NULL
4821 && maybe_needs_stubs (input_section));
4822 iovl = overlay_index (input_section);
4823 ea = bfd_get_section_by_name (output_bfd, "._ea");
4824 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4825 sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd));
4828 relend = relocs + input_section->reloc_count;
4829 for (; rel < relend; rel++)
4832 reloc_howto_type *howto;
4833 unsigned int r_symndx;
4834 Elf_Internal_Sym *sym;
4836 struct elf_link_hash_entry *h;
4837 const char *sym_name;
4840 bfd_reloc_status_type r;
4841 bfd_boolean unresolved_reloc;
4842 enum _stub_type stub_type;
4844 r_symndx = ELF32_R_SYM (rel->r_info);
4845 r_type = ELF32_R_TYPE (rel->r_info);
4846 howto = elf_howto_table + r_type;
4847 unresolved_reloc = FALSE;
4851 if (r_symndx < symtab_hdr->sh_info)
4853 sym = local_syms + r_symndx;
4854 sec = local_sections[r_symndx];
4855 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
4856 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4860 if (sym_hashes == NULL)
4863 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4865 if (info->wrap_hash != NULL
4866 && (input_section->flags & SEC_DEBUGGING) != 0)
4867 h = ((struct elf_link_hash_entry *)
4868 unwrap_hash_lookup (info, input_bfd, &h->root));
4870 while (h->root.type == bfd_link_hash_indirect
4871 || h->root.type == bfd_link_hash_warning)
4872 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4875 if (h->root.type == bfd_link_hash_defined
4876 || h->root.type == bfd_link_hash_defweak)
4878 sec = h->root.u.def.section;
4880 || sec->output_section == NULL)
4881 /* Set a flag that will be cleared later if we find a
4882 relocation value for this symbol. output_section
4883 is typically NULL for symbols satisfied by a shared
4885 unresolved_reloc = TRUE;
4887 relocation = (h->root.u.def.value
4888 + sec->output_section->vma
4889 + sec->output_offset);
4891 else if (h->root.type == bfd_link_hash_undefweak)
4893 else if (info->unresolved_syms_in_objects == RM_IGNORE
4894 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
4896 else if (!info->relocatable
4897 && !(r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64))
4900 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
4901 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT);
4902 if (!info->callbacks->undefined_symbol (info,
4903 h->root.root.string,
4906 rel->r_offset, err))
4909 sym_name = h->root.root.string;
4912 if (sec != NULL && discarded_section (sec))
4913 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4914 rel, 1, relend, howto, 0, contents);
4916 if (info->relocatable)
4919 /* Change "a rt,ra,rb" to "ai rt,ra,0". */
4920 if (r_type == R_SPU_ADD_PIC
4922 && !(h->def_regular || ELF_COMMON_DEF_P (h)))
4924 bfd_byte *loc = contents + rel->r_offset;
4930 is_ea_sym = (ea != NULL
4932 && sec->output_section == ea);
4934 /* If this symbol is in an overlay area, we may need to relocate
4935 to the overlay stub. */
4936 addend = rel->r_addend;
4939 && (stub_type = needs_ovl_stub (h, sym, sec, input_section, rel,
4940 contents, info)) != no_stub)
4942 unsigned int ovl = 0;
4943 struct got_entry *g, **head;
4945 if (stub_type != nonovl_stub)
4949 head = &h->got.glist;
4951 head = elf_local_got_ents (input_bfd) + r_symndx;
4953 for (g = *head; g != NULL; g = g->next)
4954 if (htab->params->ovly_flavour == ovly_soft_icache
4956 && g->br_addr == (rel->r_offset
4957 + input_section->output_offset
4958 + input_section->output_section->vma))
4959 : g->addend == addend && (g->ovl == ovl || g->ovl == 0))
4964 relocation = g->stub_addr;
4969 /* For soft icache, encode the overlay index into addresses. */
4970 if (htab->params->ovly_flavour == ovly_soft_icache
4971 && (r_type == R_SPU_ADDR16_HI
4972 || r_type == R_SPU_ADDR32 || r_type == R_SPU_REL32)
4975 unsigned int ovl = overlay_index (sec);
4978 unsigned int set_id = ((ovl - 1) >> htab->num_lines_log2) + 1;
4979 relocation += set_id << 18;
4984 if (htab->params->emit_fixups && !info->relocatable
4985 && (input_section->flags & SEC_ALLOC) != 0
4986 && r_type == R_SPU_ADDR32)
4989 offset = rel->r_offset + input_section->output_section->vma
4990 + input_section->output_offset;
4991 spu_elf_emit_fixup (output_bfd, info, offset);
4994 if (unresolved_reloc)
4996 else if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
5000 /* ._ea is a special section that isn't allocated in SPU
5001 memory, but rather occupies space in PPU memory as
5002 part of an embedded ELF image. If this reloc is
5003 against a symbol defined in ._ea, then transform the
5004 reloc into an equivalent one without a symbol
5005 relative to the start of the ELF image. */
5006 rel->r_addend += (relocation
5008 + elf_section_data (ea)->this_hdr.sh_offset);
5009 rel->r_info = ELF32_R_INFO (0, r_type);
5011 emit_these_relocs = TRUE;
5015 unresolved_reloc = TRUE;
5017 if (unresolved_reloc
5018 && _bfd_elf_section_offset (output_bfd, info, input_section,
5019 rel->r_offset) != (bfd_vma) -1)
5021 (*_bfd_error_handler)
5022 (_("%B(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
5024 bfd_get_section_name (input_bfd, input_section),
5025 (long) rel->r_offset,
5031 r = _bfd_final_link_relocate (howto,
5035 rel->r_offset, relocation, addend);
5037 if (r != bfd_reloc_ok)
5039 const char *msg = (const char *) 0;
5043 case bfd_reloc_overflow:
5044 if (!((*info->callbacks->reloc_overflow)
5045 (info, (h ? &h->root : NULL), sym_name, howto->name,
5046 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
5050 case bfd_reloc_undefined:
5051 if (!((*info->callbacks->undefined_symbol)
5052 (info, sym_name, input_bfd, input_section,
5053 rel->r_offset, TRUE)))
5057 case bfd_reloc_outofrange:
5058 msg = _("internal error: out of range error");
5061 case bfd_reloc_notsupported:
5062 msg = _("internal error: unsupported relocation error");
5065 case bfd_reloc_dangerous:
5066 msg = _("internal error: dangerous error");
5070 msg = _("internal error: unknown error");
5075 if (!((*info->callbacks->warning)
5076 (info, msg, sym_name, input_bfd, input_section,
5085 && emit_these_relocs
5086 && !info->emitrelocations)
5088 Elf_Internal_Rela *wrel;
5089 Elf_Internal_Shdr *rel_hdr;
5091 wrel = rel = relocs;
5092 relend = relocs + input_section->reloc_count;
5093 for (; rel < relend; rel++)
5097 r_type = ELF32_R_TYPE (rel->r_info);
5098 if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
5101 input_section->reloc_count = wrel - relocs;
5102 /* Backflips for _bfd_elf_link_output_relocs. */
5103 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5104 rel_hdr->sh_size = input_section->reloc_count * rel_hdr->sh_entsize;
5112 spu_elf_finish_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5113 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5118 /* Adjust _SPUEAR_ syms to point at their overlay stubs. */
5121 spu_elf_output_symbol_hook (struct bfd_link_info *info,
5122 const char *sym_name ATTRIBUTE_UNUSED,
5123 Elf_Internal_Sym *sym,
5124 asection *sym_sec ATTRIBUTE_UNUSED,
5125 struct elf_link_hash_entry *h)
5127 struct spu_link_hash_table *htab = spu_hash_table (info);
5129 if (!info->relocatable
5130 && htab->stub_sec != NULL
5132 && (h->root.type == bfd_link_hash_defined
5133 || h->root.type == bfd_link_hash_defweak)
5135 && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0)
5137 struct got_entry *g;
5139 for (g = h->got.glist; g != NULL; g = g->next)
5140 if (htab->params->ovly_flavour == ovly_soft_icache
5141 ? g->br_addr == g->stub_addr
5142 : g->addend == 0 && g->ovl == 0)
5144 sym->st_shndx = (_bfd_elf_section_from_bfd_section
5145 (htab->stub_sec[0]->output_section->owner,
5146 htab->stub_sec[0]->output_section));
5147 sym->st_value = g->stub_addr;
5155 static int spu_plugin = 0;
5158 spu_elf_plugin (int val)
5163 /* Set ELF header e_type for plugins. */
5166 spu_elf_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5170 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5172 i_ehdrp->e_type = ET_DYN;
5175 _bfd_elf_post_process_headers (abfd, info);
5178 /* We may add an extra PT_LOAD segment for .toe. We also need extra
5179 segments for overlays. */
5182 spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info)
5189 struct spu_link_hash_table *htab = spu_hash_table (info);
5190 extra = htab->num_overlays;
5196 sec = bfd_get_section_by_name (abfd, ".toe");
5197 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5203 /* Remove .toe section from other PT_LOAD segments and put it in
5204 a segment of its own. Put overlays in separate segments too. */
5207 spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
5210 struct elf_segment_map *m, *m_overlay;
5211 struct elf_segment_map **p, **p_overlay;
5217 toe = bfd_get_section_by_name (abfd, ".toe");
5218 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5219 if (m->p_type == PT_LOAD && m->count > 1)
5220 for (i = 0; i < m->count; i++)
5221 if ((s = m->sections[i]) == toe
5222 || spu_elf_section_data (s)->u.o.ovl_index != 0)
5224 struct elf_segment_map *m2;
5227 if (i + 1 < m->count)
5229 amt = sizeof (struct elf_segment_map);
5230 amt += (m->count - (i + 2)) * sizeof (m->sections[0]);
5231 m2 = bfd_zalloc (abfd, amt);
5234 m2->count = m->count - (i + 1);
5235 memcpy (m2->sections, m->sections + i + 1,
5236 m2->count * sizeof (m->sections[0]));
5237 m2->p_type = PT_LOAD;
5245 amt = sizeof (struct elf_segment_map);
5246 m2 = bfd_zalloc (abfd, amt);
5249 m2->p_type = PT_LOAD;
5251 m2->sections[0] = s;
5259 /* Some SPU ELF loaders ignore the PF_OVERLAY flag and just load all
5260 PT_LOAD segments. This can cause the .ovl.init section to be
5261 overwritten with the contents of some overlay segment. To work
5262 around this issue, we ensure that all PF_OVERLAY segments are
5263 sorted first amongst the program headers; this ensures that even
5264 with a broken loader, the .ovl.init section (which is not marked
5265 as PF_OVERLAY) will be placed into SPU local store on startup. */
5267 /* Move all overlay segments onto a separate list. */
5268 p = &elf_seg_map (abfd);
5269 p_overlay = &m_overlay;
5272 if ((*p)->p_type == PT_LOAD && (*p)->count == 1
5273 && spu_elf_section_data ((*p)->sections[0])->u.o.ovl_index != 0)
5278 p_overlay = &m->next;
5285 /* Re-insert overlay segments at the head of the segment map. */
5286 *p_overlay = elf_seg_map (abfd);
5287 elf_seg_map (abfd) = m_overlay;
5292 /* Tweak the section type of .note.spu_name. */
5295 spu_elf_fake_sections (bfd *obfd ATTRIBUTE_UNUSED,
5296 Elf_Internal_Shdr *hdr,
5299 if (strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0)
5300 hdr->sh_type = SHT_NOTE;
5304 /* Tweak phdrs before writing them out. */
5307 spu_elf_modify_program_headers (bfd *abfd, struct bfd_link_info *info)
5309 const struct elf_backend_data *bed;
5310 struct elf_obj_tdata *tdata;
5311 Elf_Internal_Phdr *phdr, *last;
5312 struct spu_link_hash_table *htab;
5319 bed = get_elf_backend_data (abfd);
5320 tdata = elf_tdata (abfd);
5322 count = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
5323 htab = spu_hash_table (info);
5324 if (htab->num_overlays != 0)
5326 struct elf_segment_map *m;
5329 for (i = 0, m = elf_seg_map (abfd); m; ++i, m = m->next)
5331 && (o = spu_elf_section_data (m->sections[0])->u.o.ovl_index) != 0)
5333 /* Mark this as an overlay header. */
5334 phdr[i].p_flags |= PF_OVERLAY;
5336 if (htab->ovtab != NULL && htab->ovtab->size != 0
5337 && htab->params->ovly_flavour != ovly_soft_icache)
5339 bfd_byte *p = htab->ovtab->contents;
5340 unsigned int off = o * 16 + 8;
5342 /* Write file_off into _ovly_table. */
5343 bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off);
5346 /* Soft-icache has its file offset put in .ovl.init. */
5347 if (htab->init != NULL && htab->init->size != 0)
5349 bfd_vma val = elf_section_data (htab->ovl_sec[0])->this_hdr.sh_offset;
5351 bfd_put_32 (htab->init->owner, val, htab->init->contents + 4);
5355 /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples
5356 of 16. This should always be possible when using the standard
5357 linker scripts, but don't create overlapping segments if
5358 someone is playing games with linker scripts. */
5360 for (i = count; i-- != 0; )
5361 if (phdr[i].p_type == PT_LOAD)
5365 adjust = -phdr[i].p_filesz & 15;
5368 && phdr[i].p_offset + phdr[i].p_filesz > last->p_offset - adjust)
5371 adjust = -phdr[i].p_memsz & 15;
5374 && phdr[i].p_filesz != 0
5375 && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust
5376 && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr)
5379 if (phdr[i].p_filesz != 0)
5383 if (i == (unsigned int) -1)
5384 for (i = count; i-- != 0; )
5385 if (phdr[i].p_type == PT_LOAD)
5389 adjust = -phdr[i].p_filesz & 15;
5390 phdr[i].p_filesz += adjust;
5392 adjust = -phdr[i].p_memsz & 15;
5393 phdr[i].p_memsz += adjust;
5400 spu_elf_size_sections (bfd * output_bfd, struct bfd_link_info *info)
5402 struct spu_link_hash_table *htab = spu_hash_table (info);
5403 if (htab->params->emit_fixups)
5405 asection *sfixup = htab->sfixup;
5406 int fixup_count = 0;
5410 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5414 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5417 /* Walk over each section attached to the input bfd. */
5418 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5420 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
5423 /* If there aren't any relocs, then there's nothing more
5425 if ((isec->flags & SEC_ALLOC) == 0
5426 || (isec->flags & SEC_RELOC) == 0
5427 || isec->reloc_count == 0)
5430 /* Get the relocs. */
5432 _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
5434 if (internal_relocs == NULL)
5437 /* 1 quadword can contain up to 4 R_SPU_ADDR32
5438 relocations. They are stored in a single word by
5439 saving the upper 28 bits of the address and setting the
5440 lower 4 bits to a bit mask of the words that have the
5441 relocation. BASE_END keeps track of the next quadword. */
5442 irela = internal_relocs;
5443 irelaend = irela + isec->reloc_count;
5445 for (; irela < irelaend; irela++)
5446 if (ELF32_R_TYPE (irela->r_info) == R_SPU_ADDR32
5447 && irela->r_offset >= base_end)
5449 base_end = (irela->r_offset & ~(bfd_vma) 15) + 16;
5455 /* We always have a NULL fixup as a sentinel */
5456 size = (fixup_count + 1) * FIXUP_RECORD_SIZE;
5457 if (!bfd_set_section_size (output_bfd, sfixup, size))
5459 sfixup->contents = (bfd_byte *) bfd_zalloc (info->input_bfds, size);
5460 if (sfixup->contents == NULL)
5466 #define TARGET_BIG_SYM spu_elf32_vec
5467 #define TARGET_BIG_NAME "elf32-spu"
5468 #define ELF_ARCH bfd_arch_spu
5469 #define ELF_TARGET_ID SPU_ELF_DATA
5470 #define ELF_MACHINE_CODE EM_SPU
5471 /* This matches the alignment need for DMA. */
5472 #define ELF_MAXPAGESIZE 0x80
5473 #define elf_backend_rela_normal 1
5474 #define elf_backend_can_gc_sections 1
5476 #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup
5477 #define bfd_elf32_bfd_reloc_name_lookup spu_elf_reloc_name_lookup
5478 #define elf_info_to_howto spu_elf_info_to_howto
5479 #define elf_backend_count_relocs spu_elf_count_relocs
5480 #define elf_backend_relocate_section spu_elf_relocate_section
5481 #define elf_backend_finish_dynamic_sections spu_elf_finish_dynamic_sections
5482 #define elf_backend_symbol_processing spu_elf_backend_symbol_processing
5483 #define elf_backend_link_output_symbol_hook spu_elf_output_symbol_hook
5484 #define elf_backend_object_p spu_elf_object_p
5485 #define bfd_elf32_new_section_hook spu_elf_new_section_hook
5486 #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create
5488 #define elf_backend_additional_program_headers spu_elf_additional_program_headers
5489 #define elf_backend_modify_segment_map spu_elf_modify_segment_map
5490 #define elf_backend_modify_program_headers spu_elf_modify_program_headers
5491 #define elf_backend_post_process_headers spu_elf_post_process_headers
5492 #define elf_backend_fake_sections spu_elf_fake_sections
5493 #define elf_backend_special_sections spu_elf_special_sections
5494 #define bfd_elf32_bfd_final_link spu_elf_final_link
5496 #include "elf32-target.h"