Commit | Line | Data |
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e9f53129 AM |
1 | /* SPU specific support for 32-bit ELF |
2 | ||
d16c7321 | 3 | Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
e9f53129 AM |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
e9f53129 AM |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
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. */ | |
20 | ||
e9f53129 | 21 | #include "sysdep.h" |
9dcc4794 | 22 | #include "libiberty.h" |
3db64b00 | 23 | #include "bfd.h" |
e9f53129 AM |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/spu.h" | |
28 | #include "elf32-spu.h" | |
29 | ||
30 | /* We use RELA style relocs. Don't define USE_REL. */ | |
31 | ||
32 | static bfd_reloc_status_type spu_elf_rel9 (bfd *, arelent *, asymbol *, | |
33 | void *, asection *, | |
34 | bfd *, char **); | |
35 | ||
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. */ | |
38 | ||
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), | |
b427ea91 | 58 | HOWTO (R_SPU_ADDR32, 0, 2, 32, FALSE, 0, complain_overflow_dont, |
e9f53129 AM |
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), | |
b427ea91 | 79 | HOWTO (R_SPU_REL32, 0, 2, 32, TRUE, 0, complain_overflow_dont, |
e9f53129 AM |
80 | bfd_elf_generic_reloc, "SPU_REL32", |
81 | FALSE, 0, 0xffffffff, TRUE), | |
4f4416b5 AM |
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), | |
b427ea91 | 85 | HOWTO (R_SPU_PPU32, 0, 2, 32, FALSE, 0, complain_overflow_dont, |
ece5ef60 AM |
86 | bfd_elf_generic_reloc, "SPU_PPU32", |
87 | FALSE, 0, 0xffffffff, FALSE), | |
b427ea91 | 88 | HOWTO (R_SPU_PPU64, 0, 4, 64, FALSE, 0, complain_overflow_dont, |
ece5ef60 AM |
89 | bfd_elf_generic_reloc, "SPU_PPU64", |
90 | FALSE, 0, -1, FALSE), | |
e9f53129 AM |
91 | }; |
92 | ||
93 | static struct bfd_elf_special_section const spu_elf_special_sections[] = { | |
8374f9d4 | 94 | { "._ea", 4, 0, SHT_PROGBITS, SHF_WRITE }, |
e9f53129 AM |
95 | { ".toe", 4, 0, SHT_NOBITS, SHF_ALLOC }, |
96 | { NULL, 0, 0, 0, 0 } | |
97 | }; | |
98 | ||
99 | static enum elf_spu_reloc_type | |
100 | spu_elf_bfd_to_reloc_type (bfd_reloc_code_real_type code) | |
101 | { | |
102 | switch (code) | |
103 | { | |
104 | default: | |
105 | return R_SPU_NONE; | |
106 | case BFD_RELOC_SPU_IMM10W: | |
107 | return R_SPU_ADDR10; | |
108 | case BFD_RELOC_SPU_IMM16W: | |
109 | return R_SPU_ADDR16; | |
110 | case BFD_RELOC_SPU_LO16: | |
111 | return R_SPU_ADDR16_LO; | |
112 | case BFD_RELOC_SPU_HI16: | |
113 | return R_SPU_ADDR16_HI; | |
114 | case BFD_RELOC_SPU_IMM18: | |
115 | return R_SPU_ADDR18; | |
116 | case BFD_RELOC_SPU_PCREL16: | |
117 | return R_SPU_REL16; | |
118 | case BFD_RELOC_SPU_IMM7: | |
119 | return R_SPU_ADDR7; | |
120 | case BFD_RELOC_SPU_IMM8: | |
121 | return R_SPU_NONE; | |
122 | case BFD_RELOC_SPU_PCREL9a: | |
123 | return R_SPU_REL9; | |
124 | case BFD_RELOC_SPU_PCREL9b: | |
125 | return R_SPU_REL9I; | |
126 | case BFD_RELOC_SPU_IMM10: | |
127 | return R_SPU_ADDR10I; | |
128 | case BFD_RELOC_SPU_IMM16: | |
129 | return R_SPU_ADDR16I; | |
130 | case BFD_RELOC_32: | |
131 | return R_SPU_ADDR32; | |
132 | case BFD_RELOC_32_PCREL: | |
133 | return R_SPU_REL32; | |
ece5ef60 AM |
134 | case BFD_RELOC_SPU_PPU32: |
135 | return R_SPU_PPU32; | |
136 | case BFD_RELOC_SPU_PPU64: | |
137 | return R_SPU_PPU64; | |
e9f53129 AM |
138 | } |
139 | } | |
140 | ||
141 | static void | |
142 | spu_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, | |
143 | arelent *cache_ptr, | |
144 | Elf_Internal_Rela *dst) | |
145 | { | |
146 | enum elf_spu_reloc_type r_type; | |
147 | ||
148 | r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info); | |
149 | BFD_ASSERT (r_type < R_SPU_max); | |
150 | cache_ptr->howto = &elf_howto_table[(int) r_type]; | |
151 | } | |
152 | ||
153 | static reloc_howto_type * | |
154 | spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
155 | bfd_reloc_code_real_type code) | |
156 | { | |
b16f296e AM |
157 | enum elf_spu_reloc_type r_type = spu_elf_bfd_to_reloc_type (code); |
158 | ||
159 | if (r_type == R_SPU_NONE) | |
160 | return NULL; | |
161 | ||
162 | return elf_howto_table + r_type; | |
e9f53129 AM |
163 | } |
164 | ||
157090f7 AM |
165 | static reloc_howto_type * |
166 | spu_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
167 | const char *r_name) | |
168 | { | |
169 | unsigned int i; | |
170 | ||
171 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
172 | if (elf_howto_table[i].name != NULL | |
173 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
174 | return &elf_howto_table[i]; | |
175 | ||
176 | return NULL; | |
177 | } | |
178 | ||
e9f53129 AM |
179 | /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */ |
180 | ||
181 | static bfd_reloc_status_type | |
182 | spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
183 | void *data, asection *input_section, | |
184 | bfd *output_bfd, char **error_message) | |
185 | { | |
186 | bfd_size_type octets; | |
187 | bfd_vma val; | |
188 | long insn; | |
189 | ||
190 | /* If this is a relocatable link (output_bfd test tells us), just | |
191 | call the generic function. Any adjustment will be done at final | |
192 | link time. */ | |
193 | if (output_bfd != NULL) | |
194 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
195 | input_section, output_bfd, error_message); | |
196 | ||
197 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
198 | return bfd_reloc_outofrange; | |
199 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
200 | ||
201 | /* Get symbol value. */ | |
202 | val = 0; | |
203 | if (!bfd_is_com_section (symbol->section)) | |
204 | val = symbol->value; | |
205 | if (symbol->section->output_section) | |
206 | val += symbol->section->output_section->vma; | |
207 | ||
208 | val += reloc_entry->addend; | |
209 | ||
210 | /* Make it pc-relative. */ | |
211 | val -= input_section->output_section->vma + input_section->output_offset; | |
212 | ||
213 | val >>= 2; | |
214 | if (val + 256 >= 512) | |
215 | return bfd_reloc_overflow; | |
216 | ||
217 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); | |
218 | ||
219 | /* Move two high bits of value to REL9I and REL9 position. | |
220 | The mask will take care of selecting the right field. */ | |
221 | val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16); | |
222 | insn &= ~reloc_entry->howto->dst_mask; | |
223 | insn |= val & reloc_entry->howto->dst_mask; | |
224 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); | |
225 | return bfd_reloc_ok; | |
226 | } | |
227 | ||
228 | static bfd_boolean | |
229 | spu_elf_new_section_hook (bfd *abfd, asection *sec) | |
230 | { | |
231 | if (!sec->used_by_bfd) | |
232 | { | |
233 | struct _spu_elf_section_data *sdata; | |
234 | ||
235 | sdata = bfd_zalloc (abfd, sizeof (*sdata)); | |
236 | if (sdata == NULL) | |
237 | return FALSE; | |
238 | sec->used_by_bfd = sdata; | |
239 | } | |
240 | ||
241 | return _bfd_elf_new_section_hook (abfd, sec); | |
242 | } | |
243 | ||
244 | /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that | |
245 | strip --strip-unneeded will not remove them. */ | |
246 | ||
247 | static void | |
248 | spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym) | |
249 | { | |
250 | if (sym->name != NULL | |
251 | && sym->section != bfd_abs_section_ptr | |
252 | && strncmp (sym->name, "_EAR_", 5) == 0) | |
253 | sym->flags |= BSF_KEEP; | |
254 | } | |
255 | ||
256 | /* SPU ELF linker hash table. */ | |
257 | ||
258 | struct spu_link_hash_table | |
259 | { | |
260 | struct elf_link_hash_table elf; | |
261 | ||
e9f53129 | 262 | /* Shortcuts to overlay sections. */ |
e9f53129 | 263 | asection *ovtab; |
47f6dab9 AM |
264 | asection *toe; |
265 | asection **ovl_sec; | |
266 | ||
267 | /* Count of stubs in each overlay section. */ | |
268 | unsigned int *stub_count; | |
269 | ||
270 | /* The stub section for each overlay section. */ | |
271 | asection **stub_sec; | |
e9f53129 AM |
272 | |
273 | struct elf_link_hash_entry *ovly_load; | |
47f6dab9 | 274 | struct elf_link_hash_entry *ovly_return; |
2cb5950e | 275 | unsigned long ovly_load_r_symndx; |
e9f53129 | 276 | |
e9f53129 AM |
277 | /* Number of overlay buffers. */ |
278 | unsigned int num_buf; | |
279 | ||
280 | /* Total number of overlays. */ | |
281 | unsigned int num_overlays; | |
282 | ||
9dcc4794 AM |
283 | /* How much memory we have. */ |
284 | unsigned int local_store; | |
285 | /* Local store --auto-overlay should reserve for non-overlay | |
286 | functions and data. */ | |
287 | unsigned int overlay_fixed; | |
288 | /* Local store --auto-overlay should reserve for stack and heap. */ | |
289 | unsigned int reserved; | |
290 | /* Count of overlay stubs needed in non-overlay area. */ | |
291 | unsigned int non_ovly_stub; | |
292 | ||
293 | /* Stash various callbacks for --auto-overlay. */ | |
294 | void (*spu_elf_load_ovl_mgr) (void); | |
295 | FILE *(*spu_elf_open_overlay_script) (void); | |
296 | void (*spu_elf_relink) (void); | |
297 | ||
298 | /* Bit 0 set if --auto-overlay. | |
299 | Bit 1 set if --auto-relink. | |
300 | Bit 2 set if --overlay-rodata. */ | |
301 | unsigned int auto_overlay : 3; | |
302 | #define AUTO_OVERLAY 1 | |
303 | #define AUTO_RELINK 2 | |
304 | #define OVERLAY_RODATA 4 | |
305 | ||
e9f53129 AM |
306 | /* Set if we should emit symbols for stubs. */ |
307 | unsigned int emit_stub_syms:1; | |
308 | ||
309 | /* Set if we want stubs on calls out of overlay regions to | |
310 | non-overlay regions. */ | |
311 | unsigned int non_overlay_stubs : 1; | |
312 | ||
313 | /* Set on error. */ | |
47f6dab9 | 314 | unsigned int stub_err : 1; |
49fa1e15 AM |
315 | |
316 | /* Set if stack size analysis should be done. */ | |
317 | unsigned int stack_analysis : 1; | |
318 | ||
319 | /* Set if __stack_* syms will be emitted. */ | |
320 | unsigned int emit_stack_syms : 1; | |
e9f53129 AM |
321 | }; |
322 | ||
47f6dab9 | 323 | /* Hijack the generic got fields for overlay stub accounting. */ |
e9f53129 | 324 | |
47f6dab9 | 325 | struct got_entry |
e9f53129 | 326 | { |
47f6dab9 AM |
327 | struct got_entry *next; |
328 | unsigned int ovl; | |
4a628337 | 329 | bfd_vma addend; |
47f6dab9 | 330 | bfd_vma stub_addr; |
e9f53129 AM |
331 | }; |
332 | ||
47f6dab9 AM |
333 | #define spu_hash_table(p) \ |
334 | ((struct spu_link_hash_table *) ((p)->hash)) | |
e9f53129 AM |
335 | |
336 | /* Create a spu ELF linker hash table. */ | |
337 | ||
338 | static struct bfd_link_hash_table * | |
339 | spu_elf_link_hash_table_create (bfd *abfd) | |
340 | { | |
341 | struct spu_link_hash_table *htab; | |
342 | ||
343 | htab = bfd_malloc (sizeof (*htab)); | |
344 | if (htab == NULL) | |
345 | return NULL; | |
346 | ||
347 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, | |
348 | _bfd_elf_link_hash_newfunc, | |
349 | sizeof (struct elf_link_hash_entry))) | |
350 | { | |
351 | free (htab); | |
352 | return NULL; | |
353 | } | |
354 | ||
47f6dab9 AM |
355 | memset (&htab->ovtab, 0, |
356 | sizeof (*htab) - offsetof (struct spu_link_hash_table, ovtab)); | |
e9f53129 | 357 | |
47f6dab9 AM |
358 | htab->elf.init_got_refcount.refcount = 0; |
359 | htab->elf.init_got_refcount.glist = NULL; | |
360 | htab->elf.init_got_offset.offset = 0; | |
361 | htab->elf.init_got_offset.glist = NULL; | |
e9f53129 AM |
362 | return &htab->elf.root; |
363 | } | |
364 | ||
e9f53129 AM |
365 | /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP |
366 | to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set | |
367 | *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */ | |
368 | ||
369 | static bfd_boolean | |
370 | get_sym_h (struct elf_link_hash_entry **hp, | |
371 | Elf_Internal_Sym **symp, | |
372 | asection **symsecp, | |
373 | Elf_Internal_Sym **locsymsp, | |
374 | unsigned long r_symndx, | |
375 | bfd *ibfd) | |
376 | { | |
377 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
378 | ||
379 | if (r_symndx >= symtab_hdr->sh_info) | |
380 | { | |
381 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
382 | struct elf_link_hash_entry *h; | |
383 | ||
384 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
385 | while (h->root.type == bfd_link_hash_indirect | |
386 | || h->root.type == bfd_link_hash_warning) | |
387 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
388 | ||
389 | if (hp != NULL) | |
390 | *hp = h; | |
391 | ||
392 | if (symp != NULL) | |
393 | *symp = NULL; | |
394 | ||
395 | if (symsecp != NULL) | |
396 | { | |
397 | asection *symsec = NULL; | |
398 | if (h->root.type == bfd_link_hash_defined | |
399 | || h->root.type == bfd_link_hash_defweak) | |
400 | symsec = h->root.u.def.section; | |
401 | *symsecp = symsec; | |
402 | } | |
403 | } | |
404 | else | |
405 | { | |
406 | Elf_Internal_Sym *sym; | |
407 | Elf_Internal_Sym *locsyms = *locsymsp; | |
408 | ||
409 | if (locsyms == NULL) | |
410 | { | |
411 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
412 | if (locsyms == NULL) | |
49fa1e15 AM |
413 | { |
414 | size_t symcount = symtab_hdr->sh_info; | |
415 | ||
416 | /* If we are reading symbols into the contents, then | |
417 | read the global syms too. This is done to cache | |
418 | syms for later stack analysis. */ | |
419 | if ((unsigned char **) locsymsp == &symtab_hdr->contents) | |
420 | symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize; | |
421 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, 0, | |
422 | NULL, NULL, NULL); | |
423 | } | |
e9f53129 AM |
424 | if (locsyms == NULL) |
425 | return FALSE; | |
426 | *locsymsp = locsyms; | |
427 | } | |
428 | sym = locsyms + r_symndx; | |
429 | ||
430 | if (hp != NULL) | |
431 | *hp = NULL; | |
432 | ||
433 | if (symp != NULL) | |
434 | *symp = sym; | |
435 | ||
436 | if (symsecp != NULL) | |
cb33740c | 437 | *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
e9f53129 | 438 | } |
49fa1e15 | 439 | |
e9f53129 AM |
440 | return TRUE; |
441 | } | |
442 | ||
e9f53129 AM |
443 | /* Create the note section if not already present. This is done early so |
444 | that the linker maps the sections to the right place in the output. */ | |
445 | ||
446 | bfd_boolean | |
c65be8d7 | 447 | spu_elf_create_sections (struct bfd_link_info *info, |
49fa1e15 AM |
448 | int stack_analysis, |
449 | int emit_stack_syms) | |
e9f53129 AM |
450 | { |
451 | bfd *ibfd; | |
49fa1e15 AM |
452 | struct spu_link_hash_table *htab = spu_hash_table (info); |
453 | ||
454 | /* Stash some options away where we can get at them later. */ | |
455 | htab->stack_analysis = stack_analysis; | |
456 | htab->emit_stack_syms = emit_stack_syms; | |
e9f53129 | 457 | |
58eb693e | 458 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
e9f53129 AM |
459 | if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL) |
460 | break; | |
461 | ||
462 | if (ibfd == NULL) | |
463 | { | |
464 | /* Make SPU_PTNOTE_SPUNAME section. */ | |
465 | asection *s; | |
466 | size_t name_len; | |
467 | size_t size; | |
468 | bfd_byte *data; | |
469 | flagword flags; | |
470 | ||
471 | ibfd = info->input_bfds; | |
472 | flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
473 | s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags); | |
474 | if (s == NULL | |
475 | || !bfd_set_section_alignment (ibfd, s, 4)) | |
476 | return FALSE; | |
477 | ||
c65be8d7 | 478 | name_len = strlen (bfd_get_filename (info->output_bfd)) + 1; |
e9f53129 AM |
479 | size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4); |
480 | size += (name_len + 3) & -4; | |
481 | ||
482 | if (!bfd_set_section_size (ibfd, s, size)) | |
483 | return FALSE; | |
484 | ||
485 | data = bfd_zalloc (ibfd, size); | |
486 | if (data == NULL) | |
487 | return FALSE; | |
488 | ||
489 | bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0); | |
490 | bfd_put_32 (ibfd, name_len, data + 4); | |
491 | bfd_put_32 (ibfd, 1, data + 8); | |
492 | memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME)); | |
493 | memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4), | |
c65be8d7 | 494 | bfd_get_filename (info->output_bfd), name_len); |
e9f53129 AM |
495 | s->contents = data; |
496 | } | |
497 | ||
498 | return TRUE; | |
499 | } | |
500 | ||
e9f53129 AM |
501 | /* qsort predicate to sort sections by vma. */ |
502 | ||
503 | static int | |
504 | sort_sections (const void *a, const void *b) | |
505 | { | |
506 | const asection *const *s1 = a; | |
507 | const asection *const *s2 = b; | |
508 | bfd_signed_vma delta = (*s1)->vma - (*s2)->vma; | |
509 | ||
510 | if (delta != 0) | |
511 | return delta < 0 ? -1 : 1; | |
512 | ||
513 | return (*s1)->index - (*s2)->index; | |
514 | } | |
515 | ||
516 | /* Identify overlays in the output bfd, and number them. */ | |
517 | ||
518 | bfd_boolean | |
c65be8d7 | 519 | spu_elf_find_overlays (struct bfd_link_info *info) |
e9f53129 AM |
520 | { |
521 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
522 | asection **alloc_sec; | |
523 | unsigned int i, n, ovl_index, num_buf; | |
524 | asection *s; | |
525 | bfd_vma ovl_end; | |
526 | ||
c65be8d7 | 527 | if (info->output_bfd->section_count < 2) |
e9f53129 AM |
528 | return FALSE; |
529 | ||
c65be8d7 AM |
530 | alloc_sec |
531 | = bfd_malloc (info->output_bfd->section_count * sizeof (*alloc_sec)); | |
e9f53129 AM |
532 | if (alloc_sec == NULL) |
533 | return FALSE; | |
534 | ||
535 | /* Pick out all the alloced sections. */ | |
c65be8d7 | 536 | for (n = 0, s = info->output_bfd->sections; s != NULL; s = s->next) |
e9f53129 AM |
537 | if ((s->flags & SEC_ALLOC) != 0 |
538 | && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL | |
539 | && s->size != 0) | |
540 | alloc_sec[n++] = s; | |
541 | ||
542 | if (n == 0) | |
543 | { | |
544 | free (alloc_sec); | |
545 | return FALSE; | |
546 | } | |
547 | ||
548 | /* Sort them by vma. */ | |
549 | qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections); | |
550 | ||
551 | /* Look for overlapping vmas. Any with overlap must be overlays. | |
47f6dab9 | 552 | Count them. Also count the number of overlay regions. */ |
e9f53129 AM |
553 | ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size; |
554 | for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++) | |
555 | { | |
556 | s = alloc_sec[i]; | |
557 | if (s->vma < ovl_end) | |
558 | { | |
559 | asection *s0 = alloc_sec[i - 1]; | |
560 | ||
47f6dab9 | 561 | if (spu_elf_section_data (s0)->u.o.ovl_index == 0) |
e9f53129 | 562 | { |
47f6dab9 AM |
563 | alloc_sec[ovl_index] = s0; |
564 | spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index; | |
565 | spu_elf_section_data (s0)->u.o.ovl_buf = ++num_buf; | |
e9f53129 | 566 | } |
47f6dab9 AM |
567 | alloc_sec[ovl_index] = s; |
568 | spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index; | |
569 | spu_elf_section_data (s)->u.o.ovl_buf = num_buf; | |
570 | if (s0->vma != s->vma) | |
e9f53129 | 571 | { |
47f6dab9 AM |
572 | info->callbacks->einfo (_("%X%P: overlay sections %A and %A " |
573 | "do not start at the same address.\n"), | |
574 | s0, s); | |
575 | return FALSE; | |
e9f53129 | 576 | } |
47f6dab9 AM |
577 | if (ovl_end < s->vma + s->size) |
578 | ovl_end = s->vma + s->size; | |
e9f53129 AM |
579 | } |
580 | else | |
581 | ovl_end = s->vma + s->size; | |
582 | } | |
583 | ||
584 | htab->num_overlays = ovl_index; | |
585 | htab->num_buf = num_buf; | |
47f6dab9 | 586 | htab->ovl_sec = alloc_sec; |
fdba2fcd AM |
587 | htab->ovly_load = elf_link_hash_lookup (&htab->elf, "__ovly_load", |
588 | FALSE, FALSE, FALSE); | |
589 | htab->ovly_return = elf_link_hash_lookup (&htab->elf, "__ovly_return", | |
590 | FALSE, FALSE, FALSE); | |
47f6dab9 | 591 | return ovl_index != 0; |
e9f53129 AM |
592 | } |
593 | ||
47f6dab9 AM |
594 | /* Support two sizes of overlay stubs, a slower more compact stub of two |
595 | intructions, and a faster stub of four instructions. */ | |
596 | #ifndef OVL_STUB_SIZE | |
597 | /* Default to faster. */ | |
598 | #define OVL_STUB_SIZE 16 | |
599 | /* #define OVL_STUB_SIZE 8 */ | |
600 | #endif | |
601 | #define BRSL 0x33000000 | |
602 | #define BR 0x32000000 | |
e9f53129 | 603 | #define NOP 0x40200000 |
47f6dab9 AM |
604 | #define LNOP 0x00200000 |
605 | #define ILA 0x42000000 | |
e9f53129 | 606 | |
49fa1e15 | 607 | /* Return true for all relative and absolute branch instructions. |
e9f53129 AM |
608 | bra 00110000 0.. |
609 | brasl 00110001 0.. | |
610 | br 00110010 0.. | |
611 | brsl 00110011 0.. | |
612 | brz 00100000 0.. | |
613 | brnz 00100001 0.. | |
614 | brhz 00100010 0.. | |
49fa1e15 AM |
615 | brhnz 00100011 0.. */ |
616 | ||
617 | static bfd_boolean | |
618 | is_branch (const unsigned char *insn) | |
619 | { | |
620 | return (insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0; | |
621 | } | |
622 | ||
fad9eaf0 AM |
623 | /* Return true for all indirect branch instructions. |
624 | bi 00110101 000 | |
625 | bisl 00110101 001 | |
626 | iret 00110101 010 | |
627 | bisled 00110101 011 | |
628 | biz 00100101 000 | |
629 | binz 00100101 001 | |
630 | bihz 00100101 010 | |
631 | bihnz 00100101 011 */ | |
632 | ||
633 | static bfd_boolean | |
634 | is_indirect_branch (const unsigned char *insn) | |
635 | { | |
636 | return (insn[0] & 0xef) == 0x25 && (insn[1] & 0x80) == 0; | |
637 | } | |
638 | ||
49fa1e15 | 639 | /* Return true for branch hint instructions. |
e9f53129 AM |
640 | hbra 0001000.. |
641 | hbrr 0001001.. */ | |
642 | ||
643 | static bfd_boolean | |
49fa1e15 | 644 | is_hint (const unsigned char *insn) |
e9f53129 | 645 | { |
49fa1e15 | 646 | return (insn[0] & 0xfc) == 0x10; |
e9f53129 AM |
647 | } |
648 | ||
fdba2fcd | 649 | /* True if INPUT_SECTION might need overlay stubs. */ |
aa7a0635 AM |
650 | |
651 | static bfd_boolean | |
fdba2fcd AM |
652 | maybe_needs_stubs (asection *input_section, bfd *output_bfd) |
653 | { | |
654 | /* No stubs for debug sections and suchlike. */ | |
655 | if ((input_section->flags & SEC_ALLOC) == 0) | |
656 | return FALSE; | |
657 | ||
658 | /* No stubs for link-once sections that will be discarded. */ | |
659 | if (input_section->output_section == NULL | |
660 | || input_section->output_section->owner != output_bfd) | |
661 | return FALSE; | |
662 | ||
663 | /* Don't create stubs for .eh_frame references. */ | |
664 | if (strcmp (input_section->name, ".eh_frame") == 0) | |
665 | return FALSE; | |
666 | ||
667 | return TRUE; | |
668 | } | |
669 | ||
670 | enum _stub_type | |
671 | { | |
672 | no_stub, | |
673 | ovl_stub, | |
674 | nonovl_stub, | |
675 | stub_error | |
676 | }; | |
677 | ||
678 | /* Return non-zero if this reloc symbol should go via an overlay stub. | |
679 | Return 2 if the stub must be in non-overlay area. */ | |
680 | ||
681 | static enum _stub_type | |
682 | needs_ovl_stub (struct elf_link_hash_entry *h, | |
683 | Elf_Internal_Sym *sym, | |
aa7a0635 AM |
684 | asection *sym_sec, |
685 | asection *input_section, | |
fdba2fcd AM |
686 | Elf_Internal_Rela *irela, |
687 | bfd_byte *contents, | |
688 | struct bfd_link_info *info) | |
aa7a0635 | 689 | { |
fdba2fcd AM |
690 | struct spu_link_hash_table *htab = spu_hash_table (info); |
691 | enum elf_spu_reloc_type r_type; | |
692 | unsigned int sym_type; | |
693 | bfd_boolean branch; | |
694 | enum _stub_type ret = no_stub; | |
aa7a0635 AM |
695 | |
696 | if (sym_sec == NULL | |
2c67c5f3 | 697 | || sym_sec->output_section == NULL |
fdba2fcd | 698 | || sym_sec->output_section->owner != info->output_bfd |
2c67c5f3 | 699 | || spu_elf_section_data (sym_sec->output_section) == NULL) |
fdba2fcd | 700 | return ret; |
aa7a0635 | 701 | |
fdba2fcd AM |
702 | if (h != NULL) |
703 | { | |
704 | /* Ensure no stubs for user supplied overlay manager syms. */ | |
705 | if (h == htab->ovly_load || h == htab->ovly_return) | |
706 | return ret; | |
707 | ||
708 | /* setjmp always goes via an overlay stub, because then the return | |
709 | and hence the longjmp goes via __ovly_return. That magically | |
710 | makes setjmp/longjmp between overlays work. */ | |
711 | if (strncmp (h->root.root.string, "setjmp", 6) == 0 | |
712 | && (h->root.root.string[6] == '\0' || h->root.root.string[6] == '@')) | |
713 | ret = ovl_stub; | |
714 | } | |
aa7a0635 AM |
715 | |
716 | /* Usually, symbols in non-overlay sections don't need stubs. */ | |
47f6dab9 | 717 | if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0 |
aa7a0635 | 718 | && !htab->non_overlay_stubs) |
fdba2fcd AM |
719 | return ret; |
720 | ||
721 | if (h != NULL) | |
722 | sym_type = h->type; | |
723 | else | |
724 | sym_type = ELF_ST_TYPE (sym->st_info); | |
725 | ||
726 | r_type = ELF32_R_TYPE (irela->r_info); | |
727 | branch = FALSE; | |
728 | if (r_type == R_SPU_REL16 || r_type == R_SPU_ADDR16) | |
729 | { | |
730 | bfd_byte insn[4]; | |
731 | ||
732 | if (contents == NULL) | |
733 | { | |
734 | contents = insn; | |
735 | if (!bfd_get_section_contents (input_section->owner, | |
736 | input_section, | |
737 | contents, | |
738 | irela->r_offset, 4)) | |
739 | return stub_error; | |
740 | } | |
741 | else | |
742 | contents += irela->r_offset; | |
743 | ||
744 | if (is_branch (contents) || is_hint (contents)) | |
745 | { | |
746 | branch = TRUE; | |
747 | if ((contents[0] & 0xfd) == 0x31 | |
748 | && sym_type != STT_FUNC | |
9dcc4794 | 749 | && contents != insn) |
fdba2fcd AM |
750 | { |
751 | /* It's common for people to write assembly and forget | |
752 | to give function symbols the right type. Handle | |
753 | calls to such symbols, but warn so that (hopefully) | |
754 | people will fix their code. We need the symbol | |
755 | type to be correct to distinguish function pointer | |
756 | initialisation from other pointer initialisations. */ | |
757 | const char *sym_name; | |
758 | ||
759 | if (h != NULL) | |
760 | sym_name = h->root.root.string; | |
761 | else | |
762 | { | |
763 | Elf_Internal_Shdr *symtab_hdr; | |
764 | symtab_hdr = &elf_tdata (input_section->owner)->symtab_hdr; | |
765 | sym_name = bfd_elf_sym_name (input_section->owner, | |
766 | symtab_hdr, | |
767 | sym, | |
768 | sym_sec); | |
769 | } | |
770 | (*_bfd_error_handler) (_("warning: call to non-function" | |
771 | " symbol %s defined in %B"), | |
772 | sym_sec->owner, sym_name); | |
773 | ||
774 | } | |
775 | } | |
776 | } | |
777 | ||
778 | if (sym_type != STT_FUNC | |
779 | && !branch | |
780 | && (sym_sec->flags & SEC_CODE) == 0) | |
781 | return ret; | |
aa7a0635 AM |
782 | |
783 | /* A reference from some other section to a symbol in an overlay | |
784 | section needs a stub. */ | |
47f6dab9 AM |
785 | if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index |
786 | != spu_elf_section_data (input_section->output_section)->u.o.ovl_index) | |
fdba2fcd | 787 | return ovl_stub; |
aa7a0635 AM |
788 | |
789 | /* If this insn isn't a branch then we are possibly taking the | |
790 | address of a function and passing it out somehow. */ | |
fdba2fcd | 791 | return !branch && sym_type == STT_FUNC ? nonovl_stub : ret; |
aa7a0635 AM |
792 | } |
793 | ||
47f6dab9 AM |
794 | static bfd_boolean |
795 | count_stub (struct spu_link_hash_table *htab, | |
796 | bfd *ibfd, | |
797 | asection *isec, | |
fdba2fcd | 798 | enum _stub_type stub_type, |
47f6dab9 AM |
799 | struct elf_link_hash_entry *h, |
800 | const Elf_Internal_Rela *irela) | |
801 | { | |
802 | unsigned int ovl = 0; | |
803 | struct got_entry *g, **head; | |
4a628337 | 804 | bfd_vma addend; |
47f6dab9 AM |
805 | |
806 | /* If this instruction is a branch or call, we need a stub | |
807 | for it. One stub per function per overlay. | |
808 | If it isn't a branch, then we are taking the address of | |
809 | this function so need a stub in the non-overlay area | |
810 | for it. One stub per function. */ | |
fdba2fcd | 811 | if (stub_type != nonovl_stub) |
47f6dab9 AM |
812 | ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index; |
813 | ||
814 | if (h != NULL) | |
815 | head = &h->got.glist; | |
816 | else | |
817 | { | |
818 | if (elf_local_got_ents (ibfd) == NULL) | |
819 | { | |
820 | bfd_size_type amt = (elf_tdata (ibfd)->symtab_hdr.sh_info | |
821 | * sizeof (*elf_local_got_ents (ibfd))); | |
822 | elf_local_got_ents (ibfd) = bfd_zmalloc (amt); | |
823 | if (elf_local_got_ents (ibfd) == NULL) | |
824 | return FALSE; | |
825 | } | |
826 | head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info); | |
827 | } | |
828 | ||
4a628337 AM |
829 | addend = 0; |
830 | if (irela != NULL) | |
831 | addend = irela->r_addend; | |
47f6dab9 AM |
832 | |
833 | if (ovl == 0) | |
834 | { | |
835 | struct got_entry *gnext; | |
836 | ||
4a628337 AM |
837 | for (g = *head; g != NULL; g = g->next) |
838 | if (g->addend == addend && g->ovl == 0) | |
839 | break; | |
840 | ||
841 | if (g == NULL) | |
47f6dab9 | 842 | { |
4a628337 AM |
843 | /* Need a new non-overlay area stub. Zap other stubs. */ |
844 | for (g = *head; g != NULL; g = gnext) | |
845 | { | |
846 | gnext = g->next; | |
847 | if (g->addend == addend) | |
848 | { | |
849 | htab->stub_count[g->ovl] -= 1; | |
850 | free (g); | |
851 | } | |
852 | } | |
47f6dab9 AM |
853 | } |
854 | } | |
855 | else | |
856 | { | |
4a628337 AM |
857 | for (g = *head; g != NULL; g = g->next) |
858 | if (g->addend == addend && (g->ovl == ovl || g->ovl == 0)) | |
47f6dab9 AM |
859 | break; |
860 | } | |
861 | ||
862 | if (g == NULL) | |
863 | { | |
864 | g = bfd_malloc (sizeof *g); | |
865 | if (g == NULL) | |
866 | return FALSE; | |
867 | g->ovl = ovl; | |
4a628337 | 868 | g->addend = addend; |
47f6dab9 AM |
869 | g->stub_addr = (bfd_vma) -1; |
870 | g->next = *head; | |
871 | *head = g; | |
872 | ||
873 | htab->stub_count[ovl] += 1; | |
874 | } | |
875 | ||
876 | return TRUE; | |
877 | } | |
878 | ||
879 | /* Two instruction overlay stubs look like: | |
880 | ||
881 | brsl $75,__ovly_load | |
882 | .word target_ovl_and_address | |
883 | ||
884 | ovl_and_address is a word with the overlay number in the top 14 bits | |
885 | and local store address in the bottom 18 bits. | |
886 | ||
887 | Four instruction overlay stubs look like: | |
888 | ||
889 | ila $78,ovl_number | |
890 | lnop | |
891 | ila $79,target_address | |
892 | br __ovly_load */ | |
893 | ||
894 | static bfd_boolean | |
895 | build_stub (struct spu_link_hash_table *htab, | |
896 | bfd *ibfd, | |
897 | asection *isec, | |
fdba2fcd | 898 | enum _stub_type stub_type, |
47f6dab9 AM |
899 | struct elf_link_hash_entry *h, |
900 | const Elf_Internal_Rela *irela, | |
901 | bfd_vma dest, | |
902 | asection *dest_sec) | |
903 | { | |
904 | unsigned int ovl; | |
905 | struct got_entry *g, **head; | |
906 | asection *sec; | |
4a628337 | 907 | bfd_vma addend, val, from, to; |
47f6dab9 AM |
908 | |
909 | ovl = 0; | |
fdba2fcd | 910 | if (stub_type != nonovl_stub) |
47f6dab9 AM |
911 | ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index; |
912 | ||
913 | if (h != NULL) | |
914 | head = &h->got.glist; | |
915 | else | |
916 | head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info); | |
917 | ||
4a628337 AM |
918 | addend = 0; |
919 | if (irela != NULL) | |
920 | addend = irela->r_addend; | |
47f6dab9 | 921 | |
4a628337 AM |
922 | for (g = *head; g != NULL; g = g->next) |
923 | if (g->addend == addend && (g->ovl == ovl || g->ovl == 0)) | |
47f6dab9 AM |
924 | break; |
925 | if (g == NULL) | |
926 | abort (); | |
927 | ||
4a628337 AM |
928 | if (g->ovl == 0 && ovl != 0) |
929 | return TRUE; | |
930 | ||
47f6dab9 AM |
931 | if (g->stub_addr != (bfd_vma) -1) |
932 | return TRUE; | |
933 | ||
934 | sec = htab->stub_sec[ovl]; | |
935 | dest += dest_sec->output_offset + dest_sec->output_section->vma; | |
936 | from = sec->size + sec->output_offset + sec->output_section->vma; | |
937 | g->stub_addr = from; | |
938 | to = (htab->ovly_load->root.u.def.value | |
939 | + htab->ovly_load->root.u.def.section->output_offset | |
940 | + htab->ovly_load->root.u.def.section->output_section->vma); | |
941 | val = to - from; | |
942 | if (OVL_STUB_SIZE == 16) | |
943 | val -= 12; | |
944 | if (((dest | to | from) & 3) != 0 | |
945 | || val + 0x20000 >= 0x40000) | |
946 | { | |
947 | htab->stub_err = 1; | |
948 | return FALSE; | |
949 | } | |
950 | ovl = spu_elf_section_data (dest_sec->output_section)->u.o.ovl_index; | |
951 | ||
952 | if (OVL_STUB_SIZE == 16) | |
953 | { | |
954 | bfd_put_32 (sec->owner, ILA + ((ovl << 7) & 0x01ffff80) + 78, | |
955 | sec->contents + sec->size); | |
956 | bfd_put_32 (sec->owner, LNOP, | |
957 | sec->contents + sec->size + 4); | |
958 | bfd_put_32 (sec->owner, ILA + ((dest << 7) & 0x01ffff80) + 79, | |
959 | sec->contents + sec->size + 8); | |
960 | bfd_put_32 (sec->owner, BR + ((val << 5) & 0x007fff80), | |
961 | sec->contents + sec->size + 12); | |
962 | } | |
963 | else if (OVL_STUB_SIZE == 8) | |
964 | { | |
965 | bfd_put_32 (sec->owner, BRSL + ((val << 5) & 0x007fff80) + 75, | |
966 | sec->contents + sec->size); | |
967 | ||
968 | val = (dest & 0x3ffff) | (ovl << 14); | |
969 | bfd_put_32 (sec->owner, val, | |
970 | sec->contents + sec->size + 4); | |
971 | } | |
972 | else | |
973 | abort (); | |
974 | sec->size += OVL_STUB_SIZE; | |
975 | ||
976 | if (htab->emit_stub_syms) | |
977 | { | |
978 | size_t len; | |
979 | char *name; | |
980 | int add; | |
981 | ||
982 | len = 8 + sizeof (".ovl_call.") - 1; | |
983 | if (h != NULL) | |
984 | len += strlen (h->root.root.string); | |
985 | else | |
986 | len += 8 + 1 + 8; | |
987 | add = 0; | |
988 | if (irela != NULL) | |
989 | add = (int) irela->r_addend & 0xffffffff; | |
990 | if (add != 0) | |
991 | len += 1 + 8; | |
992 | name = bfd_malloc (len); | |
993 | if (name == NULL) | |
994 | return FALSE; | |
995 | ||
996 | sprintf (name, "%08x.ovl_call.", g->ovl); | |
997 | if (h != NULL) | |
998 | strcpy (name + 8 + sizeof (".ovl_call.") - 1, h->root.root.string); | |
999 | else | |
1000 | sprintf (name + 8 + sizeof (".ovl_call.") - 1, "%x:%x", | |
1001 | dest_sec->id & 0xffffffff, | |
1002 | (int) ELF32_R_SYM (irela->r_info) & 0xffffffff); | |
1003 | if (add != 0) | |
1004 | sprintf (name + len - 9, "+%x", add); | |
1005 | ||
1006 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE); | |
1007 | free (name); | |
1008 | if (h == NULL) | |
1009 | return FALSE; | |
1010 | if (h->root.type == bfd_link_hash_new) | |
1011 | { | |
1012 | h->root.type = bfd_link_hash_defined; | |
1013 | h->root.u.def.section = sec; | |
1014 | h->root.u.def.value = sec->size - OVL_STUB_SIZE; | |
1015 | h->size = OVL_STUB_SIZE; | |
1016 | h->type = STT_FUNC; | |
1017 | h->ref_regular = 1; | |
1018 | h->def_regular = 1; | |
1019 | h->ref_regular_nonweak = 1; | |
1020 | h->forced_local = 1; | |
1021 | h->non_elf = 0; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return TRUE; | |
1026 | } | |
1027 | ||
f4b39977 AM |
1028 | /* Called via elf_link_hash_traverse to allocate stubs for any _SPUEAR_ |
1029 | symbols. */ | |
1030 | ||
1031 | static bfd_boolean | |
1032 | allocate_spuear_stubs (struct elf_link_hash_entry *h, void *inf) | |
1033 | { | |
1034 | /* Symbols starting with _SPUEAR_ need a stub because they may be | |
1035 | invoked by the PPU. */ | |
380814a6 AM |
1036 | struct bfd_link_info *info = inf; |
1037 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1038 | asection *sym_sec; | |
1039 | ||
f4b39977 AM |
1040 | if ((h->root.type == bfd_link_hash_defined |
1041 | || h->root.type == bfd_link_hash_defweak) | |
1042 | && h->def_regular | |
380814a6 AM |
1043 | && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0 |
1044 | && (sym_sec = h->root.u.def.section) != NULL | |
1045 | && sym_sec->output_section != NULL | |
1046 | && sym_sec->output_section->owner == info->output_bfd | |
1047 | && spu_elf_section_data (sym_sec->output_section) != NULL | |
1048 | && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0 | |
1049 | || htab->non_overlay_stubs)) | |
f4b39977 | 1050 | { |
fdba2fcd | 1051 | count_stub (htab, NULL, NULL, nonovl_stub, h, NULL); |
f4b39977 AM |
1052 | } |
1053 | ||
1054 | return TRUE; | |
1055 | } | |
1056 | ||
e9f53129 | 1057 | static bfd_boolean |
47f6dab9 | 1058 | build_spuear_stubs (struct elf_link_hash_entry *h, void *inf) |
e9f53129 | 1059 | { |
47f6dab9 AM |
1060 | /* Symbols starting with _SPUEAR_ need a stub because they may be |
1061 | invoked by the PPU. */ | |
380814a6 AM |
1062 | struct bfd_link_info *info = inf; |
1063 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1064 | asection *sym_sec; | |
1065 | ||
47f6dab9 AM |
1066 | if ((h->root.type == bfd_link_hash_defined |
1067 | || h->root.type == bfd_link_hash_defweak) | |
1068 | && h->def_regular | |
380814a6 AM |
1069 | && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0 |
1070 | && (sym_sec = h->root.u.def.section) != NULL | |
1071 | && sym_sec->output_section != NULL | |
1072 | && sym_sec->output_section->owner == info->output_bfd | |
1073 | && spu_elf_section_data (sym_sec->output_section) != NULL | |
1074 | && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0 | |
1075 | || htab->non_overlay_stubs)) | |
47f6dab9 | 1076 | { |
fdba2fcd | 1077 | build_stub (htab, NULL, NULL, nonovl_stub, h, NULL, |
380814a6 | 1078 | h->root.u.def.value, sym_sec); |
47f6dab9 AM |
1079 | } |
1080 | ||
e9f53129 AM |
1081 | return TRUE; |
1082 | } | |
1083 | ||
47f6dab9 | 1084 | /* Size or build stubs. */ |
e9f53129 | 1085 | |
47f6dab9 | 1086 | static bfd_boolean |
c65be8d7 | 1087 | process_stubs (struct bfd_link_info *info, bfd_boolean build) |
e9f53129 AM |
1088 | { |
1089 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1090 | bfd *ibfd; | |
e9f53129 | 1091 | |
e9f53129 AM |
1092 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
1093 | { | |
1094 | extern const bfd_target bfd_elf32_spu_vec; | |
1095 | Elf_Internal_Shdr *symtab_hdr; | |
47f6dab9 | 1096 | asection *isec; |
e9f53129 | 1097 | Elf_Internal_Sym *local_syms = NULL; |
d0249648 | 1098 | void *psyms; |
e9f53129 AM |
1099 | |
1100 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
1101 | continue; | |
1102 | ||
1103 | /* We'll need the symbol table in a second. */ | |
1104 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1105 | if (symtab_hdr->sh_info == 0) | |
1106 | continue; | |
1107 | ||
49fa1e15 AM |
1108 | /* Arrange to read and keep global syms for later stack analysis. */ |
1109 | psyms = &local_syms; | |
47f6dab9 | 1110 | if (htab->stack_analysis) |
d0249648 | 1111 | psyms = &symtab_hdr->contents; |
49fa1e15 | 1112 | |
e9f53129 | 1113 | /* Walk over each section attached to the input bfd. */ |
47f6dab9 | 1114 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
e9f53129 AM |
1115 | { |
1116 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
1117 | ||
1118 | /* If there aren't any relocs, then there's nothing more to do. */ | |
47f6dab9 | 1119 | if ((isec->flags & SEC_RELOC) == 0 |
47f6dab9 | 1120 | || isec->reloc_count == 0) |
e9f53129 AM |
1121 | continue; |
1122 | ||
c65be8d7 | 1123 | if (!maybe_needs_stubs (isec, info->output_bfd)) |
e9f53129 AM |
1124 | continue; |
1125 | ||
1126 | /* Get the relocs. */ | |
47f6dab9 AM |
1127 | internal_relocs = _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL, |
1128 | info->keep_memory); | |
e9f53129 AM |
1129 | if (internal_relocs == NULL) |
1130 | goto error_ret_free_local; | |
1131 | ||
1132 | /* Now examine each relocation. */ | |
1133 | irela = internal_relocs; | |
47f6dab9 | 1134 | irelaend = irela + isec->reloc_count; |
e9f53129 AM |
1135 | for (; irela < irelaend; irela++) |
1136 | { | |
1137 | enum elf_spu_reloc_type r_type; | |
1138 | unsigned int r_indx; | |
1139 | asection *sym_sec; | |
1140 | Elf_Internal_Sym *sym; | |
1141 | struct elf_link_hash_entry *h; | |
fdba2fcd | 1142 | enum _stub_type stub_type; |
e9f53129 AM |
1143 | |
1144 | r_type = ELF32_R_TYPE (irela->r_info); | |
1145 | r_indx = ELF32_R_SYM (irela->r_info); | |
1146 | ||
1147 | if (r_type >= R_SPU_max) | |
1148 | { | |
1149 | bfd_set_error (bfd_error_bad_value); | |
47f6dab9 AM |
1150 | error_ret_free_internal: |
1151 | if (elf_section_data (isec)->relocs != internal_relocs) | |
1152 | free (internal_relocs); | |
1153 | error_ret_free_local: | |
1154 | if (local_syms != NULL | |
1155 | && (symtab_hdr->contents | |
1156 | != (unsigned char *) local_syms)) | |
1157 | free (local_syms); | |
1158 | return FALSE; | |
e9f53129 AM |
1159 | } |
1160 | ||
1161 | /* Determine the reloc target section. */ | |
49fa1e15 | 1162 | if (!get_sym_h (&h, &sym, &sym_sec, psyms, r_indx, ibfd)) |
e9f53129 AM |
1163 | goto error_ret_free_internal; |
1164 | ||
fdba2fcd AM |
1165 | stub_type = needs_ovl_stub (h, sym, sym_sec, isec, irela, |
1166 | NULL, info); | |
1167 | if (stub_type == no_stub) | |
e9f53129 | 1168 | continue; |
fdba2fcd AM |
1169 | else if (stub_type == stub_error) |
1170 | goto error_ret_free_internal; | |
e9f53129 | 1171 | |
47f6dab9 | 1172 | if (htab->stub_count == NULL) |
e9f53129 | 1173 | { |
47f6dab9 AM |
1174 | bfd_size_type amt; |
1175 | amt = (htab->num_overlays + 1) * sizeof (*htab->stub_count); | |
1176 | htab->stub_count = bfd_zmalloc (amt); | |
1177 | if (htab->stub_count == NULL) | |
1178 | goto error_ret_free_internal; | |
e9f53129 AM |
1179 | } |
1180 | ||
47f6dab9 | 1181 | if (!build) |
e9f53129 | 1182 | { |
fdba2fcd | 1183 | if (!count_stub (htab, ibfd, isec, stub_type, h, irela)) |
47f6dab9 | 1184 | goto error_ret_free_internal; |
e9f53129 | 1185 | } |
e9f53129 | 1186 | else |
47f6dab9 AM |
1187 | { |
1188 | bfd_vma dest; | |
1189 | ||
1190 | if (h != NULL) | |
1191 | dest = h->root.u.def.value; | |
1192 | else | |
1193 | dest = sym->st_value; | |
4a628337 | 1194 | dest += irela->r_addend; |
fdba2fcd | 1195 | if (!build_stub (htab, ibfd, isec, stub_type, h, irela, |
47f6dab9 AM |
1196 | dest, sym_sec)) |
1197 | goto error_ret_free_internal; | |
1198 | } | |
e9f53129 AM |
1199 | } |
1200 | ||
1201 | /* We're done with the internal relocs, free them. */ | |
47f6dab9 | 1202 | if (elf_section_data (isec)->relocs != internal_relocs) |
e9f53129 AM |
1203 | free (internal_relocs); |
1204 | } | |
1205 | ||
1206 | if (local_syms != NULL | |
1207 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
1208 | { | |
1209 | if (!info->keep_memory) | |
1210 | free (local_syms); | |
1211 | else | |
1212 | symtab_hdr->contents = (unsigned char *) local_syms; | |
1213 | } | |
1214 | } | |
1215 | ||
47f6dab9 AM |
1216 | return TRUE; |
1217 | } | |
1218 | ||
1219 | /* Allocate space for overlay call and return stubs. */ | |
1220 | ||
1221 | int | |
c65be8d7 | 1222 | spu_elf_size_stubs (struct bfd_link_info *info, |
47f6dab9 AM |
1223 | void (*place_spu_section) (asection *, asection *, |
1224 | const char *), | |
1225 | int non_overlay_stubs) | |
1226 | { | |
1227 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1228 | bfd *ibfd; | |
1229 | bfd_size_type amt; | |
1230 | flagword flags; | |
1231 | unsigned int i; | |
1232 | asection *stub; | |
1233 | ||
1234 | htab->non_overlay_stubs = non_overlay_stubs; | |
c65be8d7 | 1235 | if (!process_stubs (info, FALSE)) |
47f6dab9 AM |
1236 | return 0; |
1237 | ||
380814a6 | 1238 | elf_link_hash_traverse (&htab->elf, allocate_spuear_stubs, info); |
47f6dab9 AM |
1239 | if (htab->stub_err) |
1240 | return 0; | |
f4b39977 | 1241 | |
47f6dab9 AM |
1242 | if (htab->stub_count == NULL) |
1243 | return 1; | |
e9f53129 AM |
1244 | |
1245 | ibfd = info->input_bfds; | |
47f6dab9 AM |
1246 | amt = (htab->num_overlays + 1) * sizeof (*htab->stub_sec); |
1247 | htab->stub_sec = bfd_zmalloc (amt); | |
1248 | if (htab->stub_sec == NULL) | |
1249 | return 0; | |
e9f53129 | 1250 | |
47f6dab9 | 1251 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
e9f53129 | 1252 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); |
47f6dab9 AM |
1253 | stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags); |
1254 | htab->stub_sec[0] = stub; | |
1255 | if (stub == NULL | |
1256 | || !bfd_set_section_alignment (ibfd, stub, 3 + (OVL_STUB_SIZE > 8))) | |
1257 | return 0; | |
1258 | stub->size = htab->stub_count[0] * OVL_STUB_SIZE; | |
1259 | (*place_spu_section) (stub, NULL, ".text"); | |
e9f53129 | 1260 | |
47f6dab9 | 1261 | for (i = 0; i < htab->num_overlays; ++i) |
e9f53129 | 1262 | { |
47f6dab9 AM |
1263 | asection *osec = htab->ovl_sec[i]; |
1264 | unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index; | |
1265 | stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags); | |
1266 | htab->stub_sec[ovl] = stub; | |
1267 | if (stub == NULL | |
1268 | || !bfd_set_section_alignment (ibfd, stub, 3 + (OVL_STUB_SIZE > 8))) | |
1269 | return 0; | |
1270 | stub->size = htab->stub_count[ovl] * OVL_STUB_SIZE; | |
1271 | (*place_spu_section) (stub, osec, NULL); | |
e9f53129 | 1272 | } |
e9f53129 AM |
1273 | |
1274 | /* htab->ovtab consists of two arrays. | |
1275 | . struct { | |
1276 | . u32 vma; | |
1277 | . u32 size; | |
1278 | . u32 file_off; | |
1279 | . u32 buf; | |
1280 | . } _ovly_table[]; | |
1281 | . | |
1282 | . struct { | |
1283 | . u32 mapped; | |
47f6dab9 AM |
1284 | . } _ovly_buf_table[]; |
1285 | . */ | |
e9f53129 | 1286 | |
47f6dab9 AM |
1287 | flags = (SEC_ALLOC | SEC_LOAD |
1288 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); | |
1289 | htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags); | |
1290 | if (htab->ovtab == NULL | |
1291 | || !bfd_set_section_alignment (ibfd, htab->ovtab, 4)) | |
1292 | return 0; | |
e9f53129 | 1293 | |
2e444bea | 1294 | htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4; |
47f6dab9 AM |
1295 | (*place_spu_section) (htab->ovtab, NULL, ".data"); |
1296 | ||
1297 | htab->toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC); | |
1298 | if (htab->toe == NULL | |
1299 | || !bfd_set_section_alignment (ibfd, htab->toe, 4)) | |
1300 | return 0; | |
1301 | htab->toe->size = 16; | |
1302 | (*place_spu_section) (htab->toe, NULL, ".toe"); | |
1303 | ||
1304 | return 2; | |
e9f53129 AM |
1305 | } |
1306 | ||
1307 | /* Functions to handle embedded spu_ovl.o object. */ | |
1308 | ||
1309 | static void * | |
1310 | ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream) | |
1311 | { | |
1312 | return stream; | |
1313 | } | |
1314 | ||
1315 | static file_ptr | |
1316 | ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED, | |
1317 | void *stream, | |
1318 | void *buf, | |
1319 | file_ptr nbytes, | |
1320 | file_ptr offset) | |
1321 | { | |
1322 | struct _ovl_stream *os; | |
1323 | size_t count; | |
1324 | size_t max; | |
1325 | ||
1326 | os = (struct _ovl_stream *) stream; | |
7a8757b3 | 1327 | max = (const char *) os->end - (const char *) os->start; |
e9f53129 AM |
1328 | |
1329 | if ((ufile_ptr) offset >= max) | |
1330 | return 0; | |
1331 | ||
1332 | count = nbytes; | |
1333 | if (count > max - offset) | |
1334 | count = max - offset; | |
1335 | ||
7a8757b3 | 1336 | memcpy (buf, (const char *) os->start + offset, count); |
e9f53129 AM |
1337 | return count; |
1338 | } | |
1339 | ||
1340 | bfd_boolean | |
1341 | spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream) | |
1342 | { | |
1343 | *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr", | |
1344 | "elf32-spu", | |
1345 | ovl_mgr_open, | |
1346 | (void *) stream, | |
1347 | ovl_mgr_pread, | |
f6cf9273 | 1348 | NULL, |
e9f53129 AM |
1349 | NULL); |
1350 | return *ovl_bfd != NULL; | |
1351 | } | |
1352 | ||
e9f53129 AM |
1353 | /* Define an STT_OBJECT symbol. */ |
1354 | ||
1355 | static struct elf_link_hash_entry * | |
1356 | define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name) | |
1357 | { | |
1358 | struct elf_link_hash_entry *h; | |
1359 | ||
1360 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); | |
1361 | if (h == NULL) | |
1362 | return NULL; | |
1363 | ||
1364 | if (h->root.type != bfd_link_hash_defined | |
1365 | || !h->def_regular) | |
1366 | { | |
1367 | h->root.type = bfd_link_hash_defined; | |
1368 | h->root.u.def.section = htab->ovtab; | |
1369 | h->type = STT_OBJECT; | |
1370 | h->ref_regular = 1; | |
1371 | h->def_regular = 1; | |
1372 | h->ref_regular_nonweak = 1; | |
1373 | h->non_elf = 0; | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | (*_bfd_error_handler) (_("%B is not allowed to define %s"), | |
1378 | h->root.u.def.section->owner, | |
1379 | h->root.root.string); | |
1380 | bfd_set_error (bfd_error_bad_value); | |
1381 | return NULL; | |
1382 | } | |
1383 | ||
1384 | return h; | |
1385 | } | |
1386 | ||
1387 | /* Fill in all stubs and the overlay tables. */ | |
1388 | ||
1389 | bfd_boolean | |
47f6dab9 | 1390 | spu_elf_build_stubs (struct bfd_link_info *info, int emit_syms) |
e9f53129 AM |
1391 | { |
1392 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1393 | struct elf_link_hash_entry *h; | |
1394 | bfd_byte *p; | |
1395 | asection *s; | |
1396 | bfd *obfd; | |
1397 | unsigned int i; | |
1398 | ||
1399 | htab->emit_stub_syms = emit_syms; | |
47f6dab9 AM |
1400 | if (htab->stub_count == NULL) |
1401 | return TRUE; | |
1402 | ||
1403 | for (i = 0; i <= htab->num_overlays; i++) | |
1404 | if (htab->stub_sec[i]->size != 0) | |
1405 | { | |
1406 | htab->stub_sec[i]->contents = bfd_zalloc (htab->stub_sec[i]->owner, | |
1407 | htab->stub_sec[i]->size); | |
1408 | if (htab->stub_sec[i]->contents == NULL) | |
1409 | return FALSE; | |
1410 | htab->stub_sec[i]->rawsize = htab->stub_sec[i]->size; | |
1411 | htab->stub_sec[i]->size = 0; | |
1412 | } | |
e9f53129 AM |
1413 | |
1414 | h = elf_link_hash_lookup (&htab->elf, "__ovly_load", FALSE, FALSE, FALSE); | |
1415 | htab->ovly_load = h; | |
1416 | BFD_ASSERT (h != NULL | |
1417 | && (h->root.type == bfd_link_hash_defined | |
1418 | || h->root.type == bfd_link_hash_defweak) | |
1419 | && h->def_regular); | |
1420 | ||
1421 | s = h->root.u.def.section->output_section; | |
47f6dab9 | 1422 | if (spu_elf_section_data (s)->u.o.ovl_index) |
e9f53129 AM |
1423 | { |
1424 | (*_bfd_error_handler) (_("%s in overlay section"), | |
2ec9638b | 1425 | h->root.root.string); |
e9f53129 AM |
1426 | bfd_set_error (bfd_error_bad_value); |
1427 | return FALSE; | |
1428 | } | |
1429 | ||
47f6dab9 AM |
1430 | h = elf_link_hash_lookup (&htab->elf, "__ovly_return", FALSE, FALSE, FALSE); |
1431 | htab->ovly_return = h; | |
1432 | ||
c65be8d7 AM |
1433 | /* Fill in all the stubs. */ |
1434 | process_stubs (info, TRUE); | |
47f6dab9 | 1435 | |
380814a6 | 1436 | elf_link_hash_traverse (&htab->elf, build_spuear_stubs, info); |
47f6dab9 AM |
1437 | if (htab->stub_err) |
1438 | return FALSE; | |
e9f53129 | 1439 | |
47f6dab9 AM |
1440 | for (i = 0; i <= htab->num_overlays; i++) |
1441 | { | |
1442 | if (htab->stub_sec[i]->size != htab->stub_sec[i]->rawsize) | |
1443 | { | |
1444 | (*_bfd_error_handler) (_("stubs don't match calculated size")); | |
1445 | bfd_set_error (bfd_error_bad_value); | |
1446 | return FALSE; | |
1447 | } | |
1448 | htab->stub_sec[i]->rawsize = 0; | |
1449 | } | |
1450 | ||
1451 | if (htab->stub_err) | |
e9f53129 AM |
1452 | { |
1453 | (*_bfd_error_handler) (_("overlay stub relocation overflow")); | |
1454 | bfd_set_error (bfd_error_bad_value); | |
1455 | return FALSE; | |
1456 | } | |
1457 | ||
1458 | htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size); | |
1459 | if (htab->ovtab->contents == NULL) | |
1460 | return FALSE; | |
1461 | ||
1462 | /* Write out _ovly_table. */ | |
1463 | p = htab->ovtab->contents; | |
2e444bea AM |
1464 | /* set low bit of .size to mark non-overlay area as present. */ |
1465 | p[7] = 1; | |
c65be8d7 | 1466 | obfd = htab->ovtab->output_section->owner; |
e9f53129 AM |
1467 | for (s = obfd->sections; s != NULL; s = s->next) |
1468 | { | |
47f6dab9 | 1469 | unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index; |
e9f53129 AM |
1470 | |
1471 | if (ovl_index != 0) | |
1472 | { | |
47f6dab9 AM |
1473 | unsigned long off = ovl_index * 16; |
1474 | unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf; | |
1475 | ||
e9f53129 AM |
1476 | bfd_put_32 (htab->ovtab->owner, s->vma, p + off); |
1477 | bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16, p + off + 4); | |
1478 | /* file_off written later in spu_elf_modify_program_headers. */ | |
2e444bea | 1479 | bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12); |
e9f53129 AM |
1480 | } |
1481 | } | |
1482 | ||
e9f53129 AM |
1483 | h = define_ovtab_symbol (htab, "_ovly_table"); |
1484 | if (h == NULL) | |
1485 | return FALSE; | |
47f6dab9 | 1486 | h->root.u.def.value = 16; |
e9f53129 AM |
1487 | h->size = htab->num_overlays * 16; |
1488 | ||
1489 | h = define_ovtab_symbol (htab, "_ovly_table_end"); | |
1490 | if (h == NULL) | |
1491 | return FALSE; | |
47f6dab9 | 1492 | h->root.u.def.value = htab->num_overlays * 16 + 16; |
e9f53129 AM |
1493 | h->size = 0; |
1494 | ||
1495 | h = define_ovtab_symbol (htab, "_ovly_buf_table"); | |
1496 | if (h == NULL) | |
1497 | return FALSE; | |
47f6dab9 | 1498 | h->root.u.def.value = htab->num_overlays * 16 + 16; |
2e444bea | 1499 | h->size = htab->num_buf * 4; |
e9f53129 AM |
1500 | |
1501 | h = define_ovtab_symbol (htab, "_ovly_buf_table_end"); | |
1502 | if (h == NULL) | |
1503 | return FALSE; | |
2e444bea | 1504 | h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4; |
e9f53129 AM |
1505 | h->size = 0; |
1506 | ||
1507 | h = define_ovtab_symbol (htab, "_EAR_"); | |
1508 | if (h == NULL) | |
1509 | return FALSE; | |
47f6dab9 | 1510 | h->root.u.def.section = htab->toe; |
e9f53129 AM |
1511 | h->root.u.def.value = 0; |
1512 | h->size = 16; | |
1513 | ||
1514 | return TRUE; | |
1515 | } | |
1516 | ||
c65be8d7 | 1517 | /* Check that all loadable section VMAs lie in the range |
9dcc4794 | 1518 | LO .. HI inclusive, and stash some parameters for --auto-overlay. */ |
c65be8d7 AM |
1519 | |
1520 | asection * | |
9dcc4794 AM |
1521 | spu_elf_check_vma (struct bfd_link_info *info, |
1522 | int auto_overlay, | |
1523 | unsigned int lo, | |
1524 | unsigned int hi, | |
1525 | unsigned int overlay_fixed, | |
1526 | unsigned int reserved, | |
1527 | void (*spu_elf_load_ovl_mgr) (void), | |
1528 | FILE *(*spu_elf_open_overlay_script) (void), | |
1529 | void (*spu_elf_relink) (void)) | |
c65be8d7 AM |
1530 | { |
1531 | struct elf_segment_map *m; | |
1532 | unsigned int i; | |
9dcc4794 | 1533 | struct spu_link_hash_table *htab = spu_hash_table (info); |
c65be8d7 AM |
1534 | bfd *abfd = info->output_bfd; |
1535 | ||
9dcc4794 AM |
1536 | if (auto_overlay & AUTO_OVERLAY) |
1537 | htab->auto_overlay = auto_overlay; | |
1538 | htab->local_store = hi + 1 - lo; | |
1539 | htab->overlay_fixed = overlay_fixed; | |
1540 | htab->reserved = reserved; | |
1541 | htab->spu_elf_load_ovl_mgr = spu_elf_load_ovl_mgr; | |
1542 | htab->spu_elf_open_overlay_script = spu_elf_open_overlay_script; | |
1543 | htab->spu_elf_relink = spu_elf_relink; | |
1544 | ||
c65be8d7 AM |
1545 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
1546 | if (m->p_type == PT_LOAD) | |
1547 | for (i = 0; i < m->count; i++) | |
1548 | if (m->sections[i]->size != 0 | |
1549 | && (m->sections[i]->vma < lo | |
1550 | || m->sections[i]->vma > hi | |
1551 | || m->sections[i]->vma + m->sections[i]->size - 1 > hi)) | |
1552 | return m->sections[i]; | |
1553 | ||
9dcc4794 AM |
1554 | /* No need for overlays if it all fits. */ |
1555 | htab->auto_overlay = 0; | |
c65be8d7 AM |
1556 | return NULL; |
1557 | } | |
1558 | ||
49fa1e15 AM |
1559 | /* OFFSET in SEC (presumably) is the beginning of a function prologue. |
1560 | Search for stack adjusting insns, and return the sp delta. */ | |
1561 | ||
1562 | static int | |
1563 | find_function_stack_adjust (asection *sec, bfd_vma offset) | |
1564 | { | |
1565 | int unrecog; | |
1566 | int reg[128]; | |
1567 | ||
1568 | memset (reg, 0, sizeof (reg)); | |
1569 | for (unrecog = 0; offset + 4 <= sec->size && unrecog < 32; offset += 4) | |
1570 | { | |
1571 | unsigned char buf[4]; | |
1572 | int rt, ra; | |
1573 | int imm; | |
1574 | ||
1575 | /* Assume no relocs on stack adjusing insns. */ | |
1576 | if (!bfd_get_section_contents (sec->owner, sec, buf, offset, 4)) | |
1577 | break; | |
1578 | ||
1579 | if (buf[0] == 0x24 /* stqd */) | |
1580 | continue; | |
1581 | ||
1582 | rt = buf[3] & 0x7f; | |
1583 | ra = ((buf[2] & 0x3f) << 1) | (buf[3] >> 7); | |
1584 | /* Partly decoded immediate field. */ | |
1585 | imm = (buf[1] << 9) | (buf[2] << 1) | (buf[3] >> 7); | |
1586 | ||
1587 | if (buf[0] == 0x1c /* ai */) | |
1588 | { | |
1589 | imm >>= 7; | |
1590 | imm = (imm ^ 0x200) - 0x200; | |
1591 | reg[rt] = reg[ra] + imm; | |
1592 | ||
1593 | if (rt == 1 /* sp */) | |
1594 | { | |
1595 | if (imm > 0) | |
1596 | break; | |
1597 | return reg[rt]; | |
1598 | } | |
1599 | } | |
1600 | else if (buf[0] == 0x18 && (buf[1] & 0xe0) == 0 /* a */) | |
1601 | { | |
1602 | int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6); | |
1603 | ||
1604 | reg[rt] = reg[ra] + reg[rb]; | |
1605 | if (rt == 1) | |
1606 | return reg[rt]; | |
1607 | } | |
1608 | else if ((buf[0] & 0xfc) == 0x40 /* il, ilh, ilhu, ila */) | |
1609 | { | |
1610 | if (buf[0] >= 0x42 /* ila */) | |
1611 | imm |= (buf[0] & 1) << 17; | |
1612 | else | |
1613 | { | |
1614 | imm &= 0xffff; | |
1615 | ||
1616 | if (buf[0] == 0x40 /* il */) | |
1617 | { | |
1618 | if ((buf[1] & 0x80) == 0) | |
1619 | goto unknown_insn; | |
1620 | imm = (imm ^ 0x8000) - 0x8000; | |
1621 | } | |
1622 | else if ((buf[1] & 0x80) == 0 /* ilhu */) | |
1623 | imm <<= 16; | |
1624 | } | |
1625 | reg[rt] = imm; | |
1626 | continue; | |
1627 | } | |
1628 | else if (buf[0] == 0x60 && (buf[1] & 0x80) != 0 /* iohl */) | |
1629 | { | |
1630 | reg[rt] |= imm & 0xffff; | |
1631 | continue; | |
1632 | } | |
1633 | else if (buf[0] == 0x04 /* ori */) | |
1634 | { | |
1635 | imm >>= 7; | |
1636 | imm = (imm ^ 0x200) - 0x200; | |
1637 | reg[rt] = reg[ra] | imm; | |
1638 | continue; | |
1639 | } | |
1640 | else if ((buf[0] == 0x33 && imm == 1 /* brsl .+4 */) | |
1641 | || (buf[0] == 0x08 && (buf[1] & 0xe0) == 0 /* sf */)) | |
1642 | { | |
1643 | /* Used in pic reg load. Say rt is trashed. */ | |
1644 | reg[rt] = 0; | |
1645 | continue; | |
1646 | } | |
fad9eaf0 | 1647 | else if (is_branch (buf) || is_indirect_branch (buf)) |
49fa1e15 AM |
1648 | /* If we hit a branch then we must be out of the prologue. */ |
1649 | break; | |
1650 | unknown_insn: | |
1651 | ++unrecog; | |
1652 | } | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | /* qsort predicate to sort symbols by section and value. */ | |
1658 | ||
1659 | static Elf_Internal_Sym *sort_syms_syms; | |
1660 | static asection **sort_syms_psecs; | |
1661 | ||
1662 | static int | |
1663 | sort_syms (const void *a, const void *b) | |
1664 | { | |
1665 | Elf_Internal_Sym *const *s1 = a; | |
1666 | Elf_Internal_Sym *const *s2 = b; | |
1667 | asection *sec1,*sec2; | |
1668 | bfd_signed_vma delta; | |
1669 | ||
1670 | sec1 = sort_syms_psecs[*s1 - sort_syms_syms]; | |
1671 | sec2 = sort_syms_psecs[*s2 - sort_syms_syms]; | |
1672 | ||
1673 | if (sec1 != sec2) | |
1674 | return sec1->index - sec2->index; | |
1675 | ||
1676 | delta = (*s1)->st_value - (*s2)->st_value; | |
1677 | if (delta != 0) | |
1678 | return delta < 0 ? -1 : 1; | |
1679 | ||
1680 | delta = (*s2)->st_size - (*s1)->st_size; | |
1681 | if (delta != 0) | |
1682 | return delta < 0 ? -1 : 1; | |
1683 | ||
1684 | return *s1 < *s2 ? -1 : 1; | |
1685 | } | |
1686 | ||
1687 | struct call_info | |
1688 | { | |
1689 | struct function_info *fun; | |
1690 | struct call_info *next; | |
9dcc4794 AM |
1691 | unsigned int count; |
1692 | unsigned int max_depth; | |
c65be8d7 | 1693 | unsigned int is_tail : 1; |
9dcc4794 | 1694 | unsigned int is_pasted : 1; |
49fa1e15 AM |
1695 | }; |
1696 | ||
1697 | struct function_info | |
1698 | { | |
1699 | /* List of functions called. Also branches to hot/cold part of | |
1700 | function. */ | |
1701 | struct call_info *call_list; | |
1702 | /* For hot/cold part of function, point to owner. */ | |
1703 | struct function_info *start; | |
1704 | /* Symbol at start of function. */ | |
1705 | union { | |
1706 | Elf_Internal_Sym *sym; | |
1707 | struct elf_link_hash_entry *h; | |
1708 | } u; | |
1709 | /* Function section. */ | |
1710 | asection *sec; | |
9dcc4794 AM |
1711 | asection *rodata; |
1712 | /* Where last called from, and number of sections called from. */ | |
1713 | asection *last_caller; | |
1714 | unsigned int call_count; | |
49fa1e15 AM |
1715 | /* Address range of (this part of) function. */ |
1716 | bfd_vma lo, hi; | |
1717 | /* Stack usage. */ | |
1718 | int stack; | |
9dcc4794 AM |
1719 | /* Distance from root of call tree. Tail and hot/cold branches |
1720 | count as one deeper. We aren't counting stack frames here. */ | |
1721 | unsigned int depth; | |
49fa1e15 AM |
1722 | /* Set if global symbol. */ |
1723 | unsigned int global : 1; | |
1724 | /* Set if known to be start of function (as distinct from a hunk | |
1725 | in hot/cold section. */ | |
1726 | unsigned int is_func : 1; | |
9dcc4794 | 1727 | /* Set if not a root node. */ |
49fa1e15 | 1728 | unsigned int non_root : 1; |
9dcc4794 AM |
1729 | /* Flags used during call tree traversal. It's cheaper to replicate |
1730 | the visit flags than have one which needs clearing after a traversal. */ | |
1731 | unsigned int visit1 : 1; | |
49fa1e15 AM |
1732 | unsigned int visit2 : 1; |
1733 | unsigned int marking : 1; | |
1734 | unsigned int visit3 : 1; | |
9dcc4794 AM |
1735 | unsigned int visit4 : 1; |
1736 | unsigned int visit5 : 1; | |
1737 | unsigned int visit6 : 1; | |
1738 | unsigned int visit7 : 1; | |
49fa1e15 AM |
1739 | }; |
1740 | ||
1741 | struct spu_elf_stack_info | |
1742 | { | |
1743 | int num_fun; | |
1744 | int max_fun; | |
1745 | /* Variable size array describing functions, one per contiguous | |
1746 | address range belonging to a function. */ | |
1747 | struct function_info fun[1]; | |
1748 | }; | |
1749 | ||
1750 | /* Allocate a struct spu_elf_stack_info with MAX_FUN struct function_info | |
1751 | entries for section SEC. */ | |
1752 | ||
1753 | static struct spu_elf_stack_info * | |
1754 | alloc_stack_info (asection *sec, int max_fun) | |
1755 | { | |
1756 | struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec); | |
1757 | bfd_size_type amt; | |
1758 | ||
1759 | amt = sizeof (struct spu_elf_stack_info); | |
1760 | amt += (max_fun - 1) * sizeof (struct function_info); | |
47f6dab9 AM |
1761 | sec_data->u.i.stack_info = bfd_zmalloc (amt); |
1762 | if (sec_data->u.i.stack_info != NULL) | |
1763 | sec_data->u.i.stack_info->max_fun = max_fun; | |
1764 | return sec_data->u.i.stack_info; | |
49fa1e15 AM |
1765 | } |
1766 | ||
1767 | /* Add a new struct function_info describing a (part of a) function | |
1768 | starting at SYM_H. Keep the array sorted by address. */ | |
1769 | ||
1770 | static struct function_info * | |
1771 | maybe_insert_function (asection *sec, | |
1772 | void *sym_h, | |
1773 | bfd_boolean global, | |
1774 | bfd_boolean is_func) | |
1775 | { | |
1776 | struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec); | |
47f6dab9 | 1777 | struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info; |
49fa1e15 AM |
1778 | int i; |
1779 | bfd_vma off, size; | |
1780 | ||
1781 | if (sinfo == NULL) | |
1782 | { | |
1783 | sinfo = alloc_stack_info (sec, 20); | |
1784 | if (sinfo == NULL) | |
1785 | return NULL; | |
1786 | } | |
1787 | ||
1788 | if (!global) | |
1789 | { | |
1790 | Elf_Internal_Sym *sym = sym_h; | |
1791 | off = sym->st_value; | |
1792 | size = sym->st_size; | |
1793 | } | |
1794 | else | |
1795 | { | |
1796 | struct elf_link_hash_entry *h = sym_h; | |
1797 | off = h->root.u.def.value; | |
1798 | size = h->size; | |
1799 | } | |
1800 | ||
1801 | for (i = sinfo->num_fun; --i >= 0; ) | |
1802 | if (sinfo->fun[i].lo <= off) | |
1803 | break; | |
1804 | ||
1805 | if (i >= 0) | |
1806 | { | |
1807 | /* Don't add another entry for an alias, but do update some | |
1808 | info. */ | |
1809 | if (sinfo->fun[i].lo == off) | |
1810 | { | |
1811 | /* Prefer globals over local syms. */ | |
1812 | if (global && !sinfo->fun[i].global) | |
1813 | { | |
1814 | sinfo->fun[i].global = TRUE; | |
1815 | sinfo->fun[i].u.h = sym_h; | |
1816 | } | |
1817 | if (is_func) | |
1818 | sinfo->fun[i].is_func = TRUE; | |
1819 | return &sinfo->fun[i]; | |
1820 | } | |
1821 | /* Ignore a zero-size symbol inside an existing function. */ | |
1822 | else if (sinfo->fun[i].hi > off && size == 0) | |
1823 | return &sinfo->fun[i]; | |
1824 | } | |
1825 | ||
1826 | if (++i < sinfo->num_fun) | |
1827 | memmove (&sinfo->fun[i + 1], &sinfo->fun[i], | |
1828 | (sinfo->num_fun - i) * sizeof (sinfo->fun[i])); | |
1829 | else if (i >= sinfo->max_fun) | |
1830 | { | |
1831 | bfd_size_type amt = sizeof (struct spu_elf_stack_info); | |
1832 | bfd_size_type old = amt; | |
1833 | ||
1834 | old += (sinfo->max_fun - 1) * sizeof (struct function_info); | |
1835 | sinfo->max_fun += 20 + (sinfo->max_fun >> 1); | |
1836 | amt += (sinfo->max_fun - 1) * sizeof (struct function_info); | |
1837 | sinfo = bfd_realloc (sinfo, amt); | |
1838 | if (sinfo == NULL) | |
1839 | return NULL; | |
1840 | memset ((char *) sinfo + old, 0, amt - old); | |
47f6dab9 | 1841 | sec_data->u.i.stack_info = sinfo; |
49fa1e15 AM |
1842 | } |
1843 | sinfo->fun[i].is_func = is_func; | |
1844 | sinfo->fun[i].global = global; | |
1845 | sinfo->fun[i].sec = sec; | |
1846 | if (global) | |
1847 | sinfo->fun[i].u.h = sym_h; | |
1848 | else | |
1849 | sinfo->fun[i].u.sym = sym_h; | |
1850 | sinfo->fun[i].lo = off; | |
1851 | sinfo->fun[i].hi = off + size; | |
1852 | sinfo->fun[i].stack = -find_function_stack_adjust (sec, off); | |
1853 | sinfo->num_fun += 1; | |
1854 | return &sinfo->fun[i]; | |
1855 | } | |
1856 | ||
1857 | /* Return the name of FUN. */ | |
1858 | ||
1859 | static const char * | |
1860 | func_name (struct function_info *fun) | |
1861 | { | |
1862 | asection *sec; | |
1863 | bfd *ibfd; | |
1864 | Elf_Internal_Shdr *symtab_hdr; | |
1865 | ||
1866 | while (fun->start != NULL) | |
1867 | fun = fun->start; | |
1868 | ||
1869 | if (fun->global) | |
1870 | return fun->u.h->root.root.string; | |
1871 | ||
1872 | sec = fun->sec; | |
1873 | if (fun->u.sym->st_name == 0) | |
1874 | { | |
1875 | size_t len = strlen (sec->name); | |
1876 | char *name = bfd_malloc (len + 10); | |
1877 | if (name == NULL) | |
1878 | return "(null)"; | |
1879 | sprintf (name, "%s+%lx", sec->name, | |
1880 | (unsigned long) fun->u.sym->st_value & 0xffffffff); | |
1881 | return name; | |
1882 | } | |
1883 | ibfd = sec->owner; | |
1884 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1885 | return bfd_elf_sym_name (ibfd, symtab_hdr, fun->u.sym, sec); | |
1886 | } | |
1887 | ||
1888 | /* Read the instruction at OFF in SEC. Return true iff the instruction | |
1889 | is a nop, lnop, or stop 0 (all zero insn). */ | |
1890 | ||
1891 | static bfd_boolean | |
1892 | is_nop (asection *sec, bfd_vma off) | |
1893 | { | |
1894 | unsigned char insn[4]; | |
1895 | ||
1896 | if (off + 4 > sec->size | |
1897 | || !bfd_get_section_contents (sec->owner, sec, insn, off, 4)) | |
1898 | return FALSE; | |
1899 | if ((insn[0] & 0xbf) == 0 && (insn[1] & 0xe0) == 0x20) | |
1900 | return TRUE; | |
1901 | if (insn[0] == 0 && insn[1] == 0 && insn[2] == 0 && insn[3] == 0) | |
1902 | return TRUE; | |
1903 | return FALSE; | |
1904 | } | |
1905 | ||
1906 | /* Extend the range of FUN to cover nop padding up to LIMIT. | |
1907 | Return TRUE iff some instruction other than a NOP was found. */ | |
1908 | ||
1909 | static bfd_boolean | |
1910 | insns_at_end (struct function_info *fun, bfd_vma limit) | |
1911 | { | |
1912 | bfd_vma off = (fun->hi + 3) & -4; | |
1913 | ||
1914 | while (off < limit && is_nop (fun->sec, off)) | |
1915 | off += 4; | |
1916 | if (off < limit) | |
1917 | { | |
1918 | fun->hi = off; | |
1919 | return TRUE; | |
1920 | } | |
1921 | fun->hi = limit; | |
1922 | return FALSE; | |
1923 | } | |
1924 | ||
1925 | /* Check and fix overlapping function ranges. Return TRUE iff there | |
1926 | are gaps in the current info we have about functions in SEC. */ | |
1927 | ||
1928 | static bfd_boolean | |
1929 | check_function_ranges (asection *sec, struct bfd_link_info *info) | |
1930 | { | |
1931 | struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec); | |
47f6dab9 | 1932 | struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info; |
49fa1e15 AM |
1933 | int i; |
1934 | bfd_boolean gaps = FALSE; | |
1935 | ||
1936 | if (sinfo == NULL) | |
1937 | return FALSE; | |
1938 | ||
1939 | for (i = 1; i < sinfo->num_fun; i++) | |
1940 | if (sinfo->fun[i - 1].hi > sinfo->fun[i].lo) | |
1941 | { | |
1942 | /* Fix overlapping symbols. */ | |
1943 | const char *f1 = func_name (&sinfo->fun[i - 1]); | |
1944 | const char *f2 = func_name (&sinfo->fun[i]); | |
1945 | ||
1946 | info->callbacks->einfo (_("warning: %s overlaps %s\n"), f1, f2); | |
1947 | sinfo->fun[i - 1].hi = sinfo->fun[i].lo; | |
1948 | } | |
1949 | else if (insns_at_end (&sinfo->fun[i - 1], sinfo->fun[i].lo)) | |
1950 | gaps = TRUE; | |
1951 | ||
1952 | if (sinfo->num_fun == 0) | |
1953 | gaps = TRUE; | |
1954 | else | |
1955 | { | |
1956 | if (sinfo->fun[0].lo != 0) | |
1957 | gaps = TRUE; | |
1958 | if (sinfo->fun[sinfo->num_fun - 1].hi > sec->size) | |
1959 | { | |
1960 | const char *f1 = func_name (&sinfo->fun[sinfo->num_fun - 1]); | |
1961 | ||
1962 | info->callbacks->einfo (_("warning: %s exceeds section size\n"), f1); | |
1963 | sinfo->fun[sinfo->num_fun - 1].hi = sec->size; | |
1964 | } | |
1965 | else if (insns_at_end (&sinfo->fun[sinfo->num_fun - 1], sec->size)) | |
1966 | gaps = TRUE; | |
1967 | } | |
1968 | return gaps; | |
1969 | } | |
1970 | ||
1971 | /* Search current function info for a function that contains address | |
1972 | OFFSET in section SEC. */ | |
1973 | ||
1974 | static struct function_info * | |
1975 | find_function (asection *sec, bfd_vma offset, struct bfd_link_info *info) | |
1976 | { | |
1977 | struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec); | |
47f6dab9 | 1978 | struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info; |
49fa1e15 AM |
1979 | int lo, hi, mid; |
1980 | ||
1981 | lo = 0; | |
1982 | hi = sinfo->num_fun; | |
1983 | while (lo < hi) | |
1984 | { | |
1985 | mid = (lo + hi) / 2; | |
1986 | if (offset < sinfo->fun[mid].lo) | |
1987 | hi = mid; | |
1988 | else if (offset >= sinfo->fun[mid].hi) | |
1989 | lo = mid + 1; | |
1990 | else | |
1991 | return &sinfo->fun[mid]; | |
1992 | } | |
1993 | info->callbacks->einfo (_("%A:0x%v not found in function table\n"), | |
1994 | sec, offset); | |
1995 | return NULL; | |
1996 | } | |
1997 | ||
9dcc4794 AM |
1998 | /* Add CALLEE to CALLER call list if not already present. Return TRUE |
1999 | if CALLEE was new. If this function return FALSE, CALLEE should | |
2000 | be freed. */ | |
49fa1e15 AM |
2001 | |
2002 | static bfd_boolean | |
2003 | insert_callee (struct function_info *caller, struct call_info *callee) | |
2004 | { | |
055ed83b AM |
2005 | struct call_info **pp, *p; |
2006 | ||
2007 | for (pp = &caller->call_list; (p = *pp) != NULL; pp = &p->next) | |
49fa1e15 AM |
2008 | if (p->fun == callee->fun) |
2009 | { | |
2010 | /* Tail calls use less stack than normal calls. Retain entry | |
2011 | for normal call over one for tail call. */ | |
c65be8d7 AM |
2012 | p->is_tail &= callee->is_tail; |
2013 | if (!p->is_tail) | |
2014 | { | |
2015 | p->fun->start = NULL; | |
2016 | p->fun->is_func = TRUE; | |
2017 | } | |
9dcc4794 | 2018 | p->count += 1; |
055ed83b AM |
2019 | /* Reorder list so most recent call is first. */ |
2020 | *pp = p->next; | |
2021 | p->next = caller->call_list; | |
2022 | caller->call_list = p; | |
49fa1e15 AM |
2023 | return FALSE; |
2024 | } | |
2025 | callee->next = caller->call_list; | |
9dcc4794 | 2026 | callee->count += 1; |
49fa1e15 AM |
2027 | caller->call_list = callee; |
2028 | return TRUE; | |
2029 | } | |
2030 | ||
9dcc4794 AM |
2031 | /* Copy CALL and insert the copy into CALLER. */ |
2032 | ||
2033 | static bfd_boolean | |
2034 | copy_callee (struct function_info *caller, const struct call_info *call) | |
2035 | { | |
2036 | struct call_info *callee; | |
2037 | callee = bfd_malloc (sizeof (*callee)); | |
2038 | if (callee == NULL) | |
2039 | return FALSE; | |
2040 | *callee = *call; | |
2041 | if (!insert_callee (caller, callee)) | |
2042 | free (callee); | |
2043 | return TRUE; | |
2044 | } | |
2045 | ||
055ed83b AM |
2046 | /* We're only interested in code sections. Testing SEC_IN_MEMORY excludes |
2047 | overlay stub sections. */ | |
2048 | ||
2049 | static bfd_boolean | |
2050 | interesting_section (asection *s, bfd *obfd) | |
2051 | { | |
2052 | return (s->output_section != NULL | |
2053 | && s->output_section->owner == obfd | |
2054 | && ((s->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_IN_MEMORY)) | |
2055 | == (SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
2056 | && s->size != 0); | |
2057 | } | |
2058 | ||
49fa1e15 AM |
2059 | /* Rummage through the relocs for SEC, looking for function calls. |
2060 | If CALL_TREE is true, fill in call graph. If CALL_TREE is false, | |
2061 | mark destination symbols on calls as being functions. Also | |
2062 | look at branches, which may be tail calls or go to hot/cold | |
2063 | section part of same function. */ | |
2064 | ||
2065 | static bfd_boolean | |
2066 | mark_functions_via_relocs (asection *sec, | |
2067 | struct bfd_link_info *info, | |
2068 | int call_tree) | |
2069 | { | |
2070 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2ec9638b | 2071 | Elf_Internal_Shdr *symtab_hdr; |
d0249648 AM |
2072 | Elf_Internal_Sym *syms; |
2073 | void *psyms; | |
49fa1e15 AM |
2074 | static bfd_boolean warned; |
2075 | ||
055ed83b AM |
2076 | if (!interesting_section (sec, info->output_bfd) |
2077 | || sec->reloc_count == 0) | |
2078 | return TRUE; | |
2079 | ||
49fa1e15 AM |
2080 | internal_relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, |
2081 | info->keep_memory); | |
2082 | if (internal_relocs == NULL) | |
2083 | return FALSE; | |
2084 | ||
2085 | symtab_hdr = &elf_tdata (sec->owner)->symtab_hdr; | |
d0249648 AM |
2086 | psyms = &symtab_hdr->contents; |
2087 | syms = *(Elf_Internal_Sym **) psyms; | |
49fa1e15 AM |
2088 | irela = internal_relocs; |
2089 | irelaend = irela + sec->reloc_count; | |
2090 | for (; irela < irelaend; irela++) | |
2091 | { | |
2092 | enum elf_spu_reloc_type r_type; | |
2093 | unsigned int r_indx; | |
2094 | asection *sym_sec; | |
2095 | Elf_Internal_Sym *sym; | |
2096 | struct elf_link_hash_entry *h; | |
2097 | bfd_vma val; | |
9dcc4794 | 2098 | bfd_boolean reject, is_call; |
49fa1e15 AM |
2099 | struct function_info *caller; |
2100 | struct call_info *callee; | |
2101 | ||
9dcc4794 | 2102 | reject = FALSE; |
49fa1e15 AM |
2103 | r_type = ELF32_R_TYPE (irela->r_info); |
2104 | if (r_type != R_SPU_REL16 | |
2105 | && r_type != R_SPU_ADDR16) | |
9dcc4794 AM |
2106 | { |
2107 | reject = TRUE; | |
2108 | if (!(call_tree && spu_hash_table (info)->auto_overlay)) | |
2109 | continue; | |
2110 | } | |
49fa1e15 AM |
2111 | |
2112 | r_indx = ELF32_R_SYM (irela->r_info); | |
2113 | if (!get_sym_h (&h, &sym, &sym_sec, psyms, r_indx, sec->owner)) | |
2114 | return FALSE; | |
2115 | ||
2116 | if (sym_sec == NULL | |
2117 | || sym_sec->output_section == NULL | |
055ed83b | 2118 | || sym_sec->output_section->owner != info->output_bfd) |
49fa1e15 AM |
2119 | continue; |
2120 | ||
9dcc4794 AM |
2121 | is_call = FALSE; |
2122 | if (!reject) | |
2123 | { | |
2124 | unsigned char insn[4]; | |
2125 | ||
2126 | if (!bfd_get_section_contents (sec->owner, sec, insn, | |
2127 | irela->r_offset, 4)) | |
2128 | return FALSE; | |
2129 | if (is_branch (insn)) | |
2130 | { | |
2131 | is_call = (insn[0] & 0xfd) == 0x31; | |
2132 | if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
2133 | != (SEC_ALLOC | SEC_LOAD | SEC_CODE)) | |
2134 | { | |
2135 | if (!warned) | |
2136 | info->callbacks->einfo | |
2137 | (_("%B(%A+0x%v): call to non-code section" | |
2138 | " %B(%A), analysis incomplete\n"), | |
2139 | sec->owner, sec, irela->r_offset, | |
2140 | sym_sec->owner, sym_sec); | |
2141 | warned = TRUE; | |
2142 | continue; | |
2143 | } | |
2144 | } | |
2145 | else | |
2146 | { | |
2147 | reject = TRUE; | |
2148 | if (!(call_tree && spu_hash_table (info)->auto_overlay) | |
2149 | || is_hint (insn)) | |
2150 | continue; | |
2151 | } | |
2152 | } | |
49fa1e15 | 2153 | |
9dcc4794 | 2154 | if (reject) |
49fa1e15 | 2155 | { |
9dcc4794 AM |
2156 | /* For --auto-overlay, count possible stubs we need for |
2157 | function pointer references. */ | |
2158 | unsigned int sym_type; | |
2159 | if (h) | |
2160 | sym_type = h->type; | |
2161 | else | |
2162 | sym_type = ELF_ST_TYPE (sym->st_info); | |
2163 | if (sym_type == STT_FUNC) | |
2164 | spu_hash_table (info)->non_ovly_stub += 1; | |
49fa1e15 AM |
2165 | continue; |
2166 | } | |
2167 | ||
49fa1e15 AM |
2168 | if (h) |
2169 | val = h->root.u.def.value; | |
2170 | else | |
2171 | val = sym->st_value; | |
2172 | val += irela->r_addend; | |
2173 | ||
2174 | if (!call_tree) | |
2175 | { | |
2176 | struct function_info *fun; | |
2177 | ||
2178 | if (irela->r_addend != 0) | |
2179 | { | |
2180 | Elf_Internal_Sym *fake = bfd_zmalloc (sizeof (*fake)); | |
2181 | if (fake == NULL) | |
2182 | return FALSE; | |
2183 | fake->st_value = val; | |
2184 | fake->st_shndx | |
2185 | = _bfd_elf_section_from_bfd_section (sym_sec->owner, sym_sec); | |
2186 | sym = fake; | |
2187 | } | |
2188 | if (sym) | |
2189 | fun = maybe_insert_function (sym_sec, sym, FALSE, is_call); | |
2190 | else | |
2191 | fun = maybe_insert_function (sym_sec, h, TRUE, is_call); | |
2192 | if (fun == NULL) | |
2193 | return FALSE; | |
2194 | if (irela->r_addend != 0 | |
2195 | && fun->u.sym != sym) | |
2196 | free (sym); | |
2197 | continue; | |
2198 | } | |
2199 | ||
2200 | caller = find_function (sec, irela->r_offset, info); | |
2201 | if (caller == NULL) | |
2202 | return FALSE; | |
2203 | callee = bfd_malloc (sizeof *callee); | |
2204 | if (callee == NULL) | |
2205 | return FALSE; | |
2206 | ||
2207 | callee->fun = find_function (sym_sec, val, info); | |
2208 | if (callee->fun == NULL) | |
2209 | return FALSE; | |
2210 | callee->is_tail = !is_call; | |
9dcc4794 AM |
2211 | callee->is_pasted = FALSE; |
2212 | callee->count = 0; | |
2213 | if (callee->fun->last_caller != sec) | |
2214 | { | |
2215 | callee->fun->last_caller = sec; | |
2216 | callee->fun->call_count += 1; | |
2217 | } | |
49fa1e15 AM |
2218 | if (!insert_callee (caller, callee)) |
2219 | free (callee); | |
2220 | else if (!is_call | |
2221 | && !callee->fun->is_func | |
2222 | && callee->fun->stack == 0) | |
2223 | { | |
2224 | /* This is either a tail call or a branch from one part of | |
2225 | the function to another, ie. hot/cold section. If the | |
2226 | destination has been called by some other function then | |
2227 | it is a separate function. We also assume that functions | |
2228 | are not split across input files. */ | |
911f096e | 2229 | if (sec->owner != sym_sec->owner) |
49fa1e15 AM |
2230 | { |
2231 | callee->fun->start = NULL; | |
2232 | callee->fun->is_func = TRUE; | |
2233 | } | |
911f096e | 2234 | else if (callee->fun->start == NULL) |
49fa1e15 | 2235 | callee->fun->start = caller; |
911f096e AM |
2236 | else |
2237 | { | |
2238 | struct function_info *callee_start; | |
2239 | struct function_info *caller_start; | |
2240 | callee_start = callee->fun; | |
2241 | while (callee_start->start) | |
2242 | callee_start = callee_start->start; | |
2243 | caller_start = caller; | |
2244 | while (caller_start->start) | |
2245 | caller_start = caller_start->start; | |
2246 | if (caller_start != callee_start) | |
2247 | { | |
2248 | callee->fun->start = NULL; | |
2249 | callee->fun->is_func = TRUE; | |
2250 | } | |
2251 | } | |
49fa1e15 AM |
2252 | } |
2253 | } | |
2254 | ||
2255 | return TRUE; | |
2256 | } | |
2257 | ||
2258 | /* Handle something like .init or .fini, which has a piece of a function. | |
2259 | These sections are pasted together to form a single function. */ | |
2260 | ||
2261 | static bfd_boolean | |
2262 | pasted_function (asection *sec, struct bfd_link_info *info) | |
2263 | { | |
2264 | struct bfd_link_order *l; | |
2265 | struct _spu_elf_section_data *sec_data; | |
2266 | struct spu_elf_stack_info *sinfo; | |
2267 | Elf_Internal_Sym *fake; | |
2268 | struct function_info *fun, *fun_start; | |
2269 | ||
2270 | fake = bfd_zmalloc (sizeof (*fake)); | |
2271 | if (fake == NULL) | |
2272 | return FALSE; | |
2273 | fake->st_value = 0; | |
2274 | fake->st_size = sec->size; | |
2275 | fake->st_shndx | |
2276 | = _bfd_elf_section_from_bfd_section (sec->owner, sec); | |
2277 | fun = maybe_insert_function (sec, fake, FALSE, FALSE); | |
2278 | if (!fun) | |
2279 | return FALSE; | |
2280 | ||
2281 | /* Find a function immediately preceding this section. */ | |
2282 | fun_start = NULL; | |
2283 | for (l = sec->output_section->map_head.link_order; l != NULL; l = l->next) | |
2284 | { | |
2285 | if (l->u.indirect.section == sec) | |
2286 | { | |
2287 | if (fun_start != NULL) | |
9dcc4794 AM |
2288 | { |
2289 | struct call_info *callee = bfd_malloc (sizeof *callee); | |
2290 | if (callee == NULL) | |
2291 | return FALSE; | |
2292 | ||
2293 | fun->start = fun_start; | |
2294 | callee->fun = fun; | |
2295 | callee->is_tail = TRUE; | |
2296 | callee->is_pasted = TRUE; | |
2297 | callee->count = 0; | |
2298 | if (!insert_callee (fun_start, callee)) | |
2299 | free (callee); | |
2300 | return TRUE; | |
2301 | } | |
2302 | break; | |
49fa1e15 AM |
2303 | } |
2304 | if (l->type == bfd_indirect_link_order | |
2305 | && (sec_data = spu_elf_section_data (l->u.indirect.section)) != NULL | |
47f6dab9 | 2306 | && (sinfo = sec_data->u.i.stack_info) != NULL |
49fa1e15 AM |
2307 | && sinfo->num_fun != 0) |
2308 | fun_start = &sinfo->fun[sinfo->num_fun - 1]; | |
2309 | } | |
2310 | ||
2311 | info->callbacks->einfo (_("%A link_order not found\n"), sec); | |
2312 | return FALSE; | |
2313 | } | |
2314 | ||
49fa1e15 AM |
2315 | /* Map address ranges in code sections to functions. */ |
2316 | ||
2317 | static bfd_boolean | |
c65be8d7 | 2318 | discover_functions (struct bfd_link_info *info) |
49fa1e15 | 2319 | { |
49fa1e15 AM |
2320 | bfd *ibfd; |
2321 | int bfd_idx; | |
2322 | Elf_Internal_Sym ***psym_arr; | |
2323 | asection ***sec_arr; | |
2324 | bfd_boolean gaps = FALSE; | |
2325 | ||
2326 | bfd_idx = 0; | |
2327 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2328 | bfd_idx++; | |
2329 | ||
2330 | psym_arr = bfd_zmalloc (bfd_idx * sizeof (*psym_arr)); | |
2331 | if (psym_arr == NULL) | |
2332 | return FALSE; | |
2333 | sec_arr = bfd_zmalloc (bfd_idx * sizeof (*sec_arr)); | |
2334 | if (sec_arr == NULL) | |
2335 | return FALSE; | |
2336 | ||
2337 | ||
2338 | for (ibfd = info->input_bfds, bfd_idx = 0; | |
2339 | ibfd != NULL; | |
2340 | ibfd = ibfd->link_next, bfd_idx++) | |
2341 | { | |
2342 | extern const bfd_target bfd_elf32_spu_vec; | |
2343 | Elf_Internal_Shdr *symtab_hdr; | |
2344 | asection *sec; | |
2345 | size_t symcount; | |
2346 | Elf_Internal_Sym *syms, *sy, **psyms, **psy; | |
2347 | asection **psecs, **p; | |
2348 | ||
2349 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
2350 | continue; | |
2351 | ||
2352 | /* Read all the symbols. */ | |
2353 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2354 | symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize; | |
2355 | if (symcount == 0) | |
055ed83b AM |
2356 | { |
2357 | if (!gaps) | |
2358 | for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next) | |
2359 | if (interesting_section (sec, info->output_bfd)) | |
2360 | { | |
2361 | gaps = TRUE; | |
2362 | break; | |
2363 | } | |
2364 | continue; | |
2365 | } | |
49fa1e15 AM |
2366 | |
2367 | syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2368 | if (syms == NULL) | |
2369 | { | |
2370 | syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, 0, | |
2371 | NULL, NULL, NULL); | |
2372 | symtab_hdr->contents = (void *) syms; | |
2373 | if (syms == NULL) | |
2374 | return FALSE; | |
2375 | } | |
2376 | ||
2377 | /* Select defined function symbols that are going to be output. */ | |
2378 | psyms = bfd_malloc ((symcount + 1) * sizeof (*psyms)); | |
2379 | if (psyms == NULL) | |
2380 | return FALSE; | |
2381 | psym_arr[bfd_idx] = psyms; | |
2382 | psecs = bfd_malloc (symcount * sizeof (*psecs)); | |
2383 | if (psecs == NULL) | |
2384 | return FALSE; | |
2385 | sec_arr[bfd_idx] = psecs; | |
2386 | for (psy = psyms, p = psecs, sy = syms; sy < syms + symcount; ++p, ++sy) | |
2387 | if (ELF_ST_TYPE (sy->st_info) == STT_NOTYPE | |
2388 | || ELF_ST_TYPE (sy->st_info) == STT_FUNC) | |
2389 | { | |
2390 | asection *s; | |
2391 | ||
2392 | *p = s = bfd_section_from_elf_index (ibfd, sy->st_shndx); | |
c65be8d7 | 2393 | if (s != NULL && interesting_section (s, info->output_bfd)) |
49fa1e15 AM |
2394 | *psy++ = sy; |
2395 | } | |
2396 | symcount = psy - psyms; | |
2397 | *psy = NULL; | |
2398 | ||
2399 | /* Sort them by section and offset within section. */ | |
2400 | sort_syms_syms = syms; | |
2401 | sort_syms_psecs = psecs; | |
2402 | qsort (psyms, symcount, sizeof (*psyms), sort_syms); | |
2403 | ||
2404 | /* Now inspect the function symbols. */ | |
2405 | for (psy = psyms; psy < psyms + symcount; ) | |
2406 | { | |
2407 | asection *s = psecs[*psy - syms]; | |
2408 | Elf_Internal_Sym **psy2; | |
2409 | ||
2410 | for (psy2 = psy; ++psy2 < psyms + symcount; ) | |
2411 | if (psecs[*psy2 - syms] != s) | |
2412 | break; | |
2413 | ||
2414 | if (!alloc_stack_info (s, psy2 - psy)) | |
2415 | return FALSE; | |
2416 | psy = psy2; | |
2417 | } | |
2418 | ||
2419 | /* First install info about properly typed and sized functions. | |
2420 | In an ideal world this will cover all code sections, except | |
2421 | when partitioning functions into hot and cold sections, | |
2422 | and the horrible pasted together .init and .fini functions. */ | |
2423 | for (psy = psyms; psy < psyms + symcount; ++psy) | |
2424 | { | |
2425 | sy = *psy; | |
2426 | if (ELF_ST_TYPE (sy->st_info) == STT_FUNC) | |
2427 | { | |
2428 | asection *s = psecs[sy - syms]; | |
2429 | if (!maybe_insert_function (s, sy, FALSE, TRUE)) | |
2430 | return FALSE; | |
2431 | } | |
2432 | } | |
2433 | ||
2434 | for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next) | |
c65be8d7 | 2435 | if (interesting_section (sec, info->output_bfd)) |
49fa1e15 AM |
2436 | gaps |= check_function_ranges (sec, info); |
2437 | } | |
2438 | ||
2439 | if (gaps) | |
2440 | { | |
2441 | /* See if we can discover more function symbols by looking at | |
2442 | relocations. */ | |
2443 | for (ibfd = info->input_bfds, bfd_idx = 0; | |
2444 | ibfd != NULL; | |
2445 | ibfd = ibfd->link_next, bfd_idx++) | |
2446 | { | |
2447 | asection *sec; | |
2448 | ||
2449 | if (psym_arr[bfd_idx] == NULL) | |
2450 | continue; | |
2451 | ||
2452 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
055ed83b AM |
2453 | if (!mark_functions_via_relocs (sec, info, FALSE)) |
2454 | return FALSE; | |
49fa1e15 AM |
2455 | } |
2456 | ||
2457 | for (ibfd = info->input_bfds, bfd_idx = 0; | |
2458 | ibfd != NULL; | |
2459 | ibfd = ibfd->link_next, bfd_idx++) | |
2460 | { | |
2461 | Elf_Internal_Shdr *symtab_hdr; | |
2462 | asection *sec; | |
2463 | Elf_Internal_Sym *syms, *sy, **psyms, **psy; | |
2464 | asection **psecs; | |
2465 | ||
2466 | if ((psyms = psym_arr[bfd_idx]) == NULL) | |
2467 | continue; | |
2468 | ||
2469 | psecs = sec_arr[bfd_idx]; | |
2470 | ||
2471 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2472 | syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2473 | ||
2474 | gaps = FALSE; | |
2475 | for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next) | |
c65be8d7 | 2476 | if (interesting_section (sec, info->output_bfd)) |
49fa1e15 AM |
2477 | gaps |= check_function_ranges (sec, info); |
2478 | if (!gaps) | |
2479 | continue; | |
2480 | ||
2481 | /* Finally, install all globals. */ | |
2482 | for (psy = psyms; (sy = *psy) != NULL; ++psy) | |
2483 | { | |
2484 | asection *s; | |
2485 | ||
2486 | s = psecs[sy - syms]; | |
2487 | ||
2488 | /* Global syms might be improperly typed functions. */ | |
2489 | if (ELF_ST_TYPE (sy->st_info) != STT_FUNC | |
2490 | && ELF_ST_BIND (sy->st_info) == STB_GLOBAL) | |
2491 | { | |
2492 | if (!maybe_insert_function (s, sy, FALSE, FALSE)) | |
2493 | return FALSE; | |
2494 | } | |
2495 | } | |
055ed83b AM |
2496 | } |
2497 | ||
2498 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2499 | { | |
2500 | extern const bfd_target bfd_elf32_spu_vec; | |
2501 | asection *sec; | |
2502 | ||
2503 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
2504 | continue; | |
49fa1e15 AM |
2505 | |
2506 | /* Some of the symbols we've installed as marking the | |
2507 | beginning of functions may have a size of zero. Extend | |
2508 | the range of such functions to the beginning of the | |
2509 | next symbol of interest. */ | |
2510 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
c65be8d7 | 2511 | if (interesting_section (sec, info->output_bfd)) |
49fa1e15 AM |
2512 | { |
2513 | struct _spu_elf_section_data *sec_data; | |
2514 | struct spu_elf_stack_info *sinfo; | |
2515 | ||
2516 | sec_data = spu_elf_section_data (sec); | |
47f6dab9 | 2517 | sinfo = sec_data->u.i.stack_info; |
49fa1e15 AM |
2518 | if (sinfo != NULL) |
2519 | { | |
2520 | int fun_idx; | |
2521 | bfd_vma hi = sec->size; | |
2522 | ||
2523 | for (fun_idx = sinfo->num_fun; --fun_idx >= 0; ) | |
2524 | { | |
2525 | sinfo->fun[fun_idx].hi = hi; | |
2526 | hi = sinfo->fun[fun_idx].lo; | |
2527 | } | |
2528 | } | |
2529 | /* No symbols in this section. Must be .init or .fini | |
2530 | or something similar. */ | |
2531 | else if (!pasted_function (sec, info)) | |
2532 | return FALSE; | |
2533 | } | |
2534 | } | |
2535 | } | |
2536 | ||
2537 | for (ibfd = info->input_bfds, bfd_idx = 0; | |
2538 | ibfd != NULL; | |
2539 | ibfd = ibfd->link_next, bfd_idx++) | |
2540 | { | |
2541 | if (psym_arr[bfd_idx] == NULL) | |
2542 | continue; | |
2543 | ||
2544 | free (psym_arr[bfd_idx]); | |
2545 | free (sec_arr[bfd_idx]); | |
2546 | } | |
2547 | ||
2548 | free (psym_arr); | |
2549 | free (sec_arr); | |
2550 | ||
2551 | return TRUE; | |
2552 | } | |
2553 | ||
055ed83b AM |
2554 | /* Iterate over all function_info we have collected, calling DOIT on |
2555 | each node if ROOT_ONLY is false. Only call DOIT on root nodes | |
2556 | if ROOT_ONLY. */ | |
2557 | ||
2558 | static bfd_boolean | |
2559 | for_each_node (bfd_boolean (*doit) (struct function_info *, | |
2560 | struct bfd_link_info *, | |
2561 | void *), | |
2562 | struct bfd_link_info *info, | |
2563 | void *param, | |
2564 | int root_only) | |
2565 | { | |
2566 | bfd *ibfd; | |
2567 | ||
2568 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2569 | { | |
2570 | extern const bfd_target bfd_elf32_spu_vec; | |
2571 | asection *sec; | |
2572 | ||
2573 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
2574 | continue; | |
2575 | ||
2576 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
2577 | { | |
2578 | struct _spu_elf_section_data *sec_data; | |
2579 | struct spu_elf_stack_info *sinfo; | |
2580 | ||
2581 | if ((sec_data = spu_elf_section_data (sec)) != NULL | |
2582 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
2583 | { | |
2584 | int i; | |
2585 | for (i = 0; i < sinfo->num_fun; ++i) | |
2586 | if (!root_only || !sinfo->fun[i].non_root) | |
2587 | if (!doit (&sinfo->fun[i], info, param)) | |
2588 | return FALSE; | |
2589 | } | |
2590 | } | |
2591 | } | |
2592 | return TRUE; | |
2593 | } | |
2594 | ||
2595 | /* Transfer call info attached to struct function_info entries for | |
2596 | all of a given function's sections to the first entry. */ | |
2597 | ||
2598 | static bfd_boolean | |
2599 | transfer_calls (struct function_info *fun, | |
2600 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2601 | void *param ATTRIBUTE_UNUSED) | |
2602 | { | |
2603 | struct function_info *start = fun->start; | |
2604 | ||
2605 | if (start != NULL) | |
2606 | { | |
2607 | struct call_info *call, *call_next; | |
2608 | ||
2609 | while (start->start != NULL) | |
2610 | start = start->start; | |
2611 | for (call = fun->call_list; call != NULL; call = call_next) | |
2612 | { | |
2613 | call_next = call->next; | |
2614 | if (!insert_callee (start, call)) | |
2615 | free (call); | |
2616 | } | |
2617 | fun->call_list = NULL; | |
2618 | } | |
2619 | return TRUE; | |
2620 | } | |
2621 | ||
49fa1e15 AM |
2622 | /* Mark nodes in the call graph that are called by some other node. */ |
2623 | ||
055ed83b AM |
2624 | static bfd_boolean |
2625 | mark_non_root (struct function_info *fun, | |
2626 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2627 | void *param ATTRIBUTE_UNUSED) | |
49fa1e15 AM |
2628 | { |
2629 | struct call_info *call; | |
2630 | ||
055ed83b AM |
2631 | if (fun->visit1) |
2632 | return TRUE; | |
49fa1e15 AM |
2633 | fun->visit1 = TRUE; |
2634 | for (call = fun->call_list; call; call = call->next) | |
2635 | { | |
2636 | call->fun->non_root = TRUE; | |
055ed83b | 2637 | mark_non_root (call->fun, 0, 0); |
49fa1e15 | 2638 | } |
055ed83b | 2639 | return TRUE; |
49fa1e15 AM |
2640 | } |
2641 | ||
9dcc4794 | 2642 | /* Remove cycles from the call graph. Set depth of nodes. */ |
49fa1e15 | 2643 | |
055ed83b AM |
2644 | static bfd_boolean |
2645 | remove_cycles (struct function_info *fun, | |
2646 | struct bfd_link_info *info, | |
9dcc4794 | 2647 | void *param) |
49fa1e15 AM |
2648 | { |
2649 | struct call_info **callp, *call; | |
9dcc4794 AM |
2650 | unsigned int depth = *(unsigned int *) param; |
2651 | unsigned int max_depth = depth; | |
49fa1e15 | 2652 | |
9dcc4794 | 2653 | fun->depth = depth; |
49fa1e15 AM |
2654 | fun->visit2 = TRUE; |
2655 | fun->marking = TRUE; | |
2656 | ||
2657 | callp = &fun->call_list; | |
2658 | while ((call = *callp) != NULL) | |
2659 | { | |
2660 | if (!call->fun->visit2) | |
055ed83b | 2661 | { |
9dcc4794 AM |
2662 | call->max_depth = depth + !call->is_pasted; |
2663 | if (!remove_cycles (call->fun, info, &call->max_depth)) | |
055ed83b | 2664 | return FALSE; |
9dcc4794 AM |
2665 | if (max_depth < call->max_depth) |
2666 | max_depth = call->max_depth; | |
055ed83b | 2667 | } |
49fa1e15 AM |
2668 | else if (call->fun->marking) |
2669 | { | |
9dcc4794 AM |
2670 | if (!spu_hash_table (info)->auto_overlay) |
2671 | { | |
2672 | const char *f1 = func_name (fun); | |
2673 | const char *f2 = func_name (call->fun); | |
49fa1e15 | 2674 | |
9dcc4794 AM |
2675 | info->callbacks->info (_("Stack analysis will ignore the call " |
2676 | "from %s to %s\n"), | |
2677 | f1, f2); | |
2678 | } | |
49fa1e15 | 2679 | *callp = call->next; |
055ed83b | 2680 | free (call); |
49fa1e15 AM |
2681 | continue; |
2682 | } | |
2683 | callp = &call->next; | |
2684 | } | |
2685 | fun->marking = FALSE; | |
9dcc4794 | 2686 | *(unsigned int *) param = max_depth; |
055ed83b | 2687 | return TRUE; |
49fa1e15 AM |
2688 | } |
2689 | ||
2690 | /* Populate call_list for each function. */ | |
2691 | ||
2692 | static bfd_boolean | |
c65be8d7 | 2693 | build_call_tree (struct bfd_link_info *info) |
49fa1e15 | 2694 | { |
49fa1e15 | 2695 | bfd *ibfd; |
9dcc4794 | 2696 | unsigned int depth; |
49fa1e15 AM |
2697 | |
2698 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2699 | { | |
2700 | extern const bfd_target bfd_elf32_spu_vec; | |
2701 | asection *sec; | |
2702 | ||
2703 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
2704 | continue; | |
2705 | ||
2706 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
055ed83b AM |
2707 | if (!mark_functions_via_relocs (sec, info, TRUE)) |
2708 | return FALSE; | |
49fa1e15 AM |
2709 | } |
2710 | ||
055ed83b AM |
2711 | /* Transfer call info from hot/cold section part of function |
2712 | to main entry. */ | |
9dcc4794 AM |
2713 | if (!spu_hash_table (info)->auto_overlay |
2714 | && !for_each_node (transfer_calls, info, 0, FALSE)) | |
055ed83b | 2715 | return FALSE; |
49fa1e15 | 2716 | |
055ed83b AM |
2717 | /* Find the call graph root(s). */ |
2718 | if (!for_each_node (mark_non_root, info, 0, FALSE)) | |
2719 | return FALSE; | |
49fa1e15 AM |
2720 | |
2721 | /* Remove cycles from the call graph. We start from the root node(s) | |
2722 | so that we break cycles in a reasonable place. */ | |
9dcc4794 AM |
2723 | depth = 0; |
2724 | return for_each_node (remove_cycles, info, &depth, TRUE); | |
2725 | } | |
2726 | ||
2727 | /* qsort predicate to sort calls by max_depth then count. */ | |
2728 | ||
2729 | static int | |
2730 | sort_calls (const void *a, const void *b) | |
2731 | { | |
2732 | struct call_info *const *c1 = a; | |
2733 | struct call_info *const *c2 = b; | |
2734 | int delta; | |
2735 | ||
2736 | delta = (*c2)->max_depth - (*c1)->max_depth; | |
2737 | if (delta != 0) | |
2738 | return delta; | |
2739 | ||
2740 | delta = (*c2)->count - (*c1)->count; | |
2741 | if (delta != 0) | |
2742 | return delta; | |
2743 | ||
2744 | return c1 - c2; | |
2745 | } | |
2746 | ||
2747 | struct _mos_param { | |
2748 | unsigned int max_overlay_size; | |
2749 | }; | |
2750 | ||
2751 | /* Set linker_mark and gc_mark on any sections that we will put in | |
2752 | overlays. These flags are used by the generic ELF linker, but we | |
2753 | won't be continuing on to bfd_elf_final_link so it is OK to use | |
2754 | them. linker_mark is clear before we get here. Set segment_mark | |
2755 | on sections that are part of a pasted function (excluding the last | |
2756 | section). | |
2757 | ||
2758 | Set up function rodata section if --overlay-rodata. We don't | |
2759 | currently include merged string constant rodata sections since | |
2760 | ||
2761 | Sort the call graph so that the deepest nodes will be visited | |
2762 | first. */ | |
2763 | ||
2764 | static bfd_boolean | |
2765 | mark_overlay_section (struct function_info *fun, | |
2766 | struct bfd_link_info *info, | |
2767 | void *param) | |
2768 | { | |
2769 | struct call_info *call; | |
2770 | unsigned int count; | |
2771 | struct _mos_param *mos_param = param; | |
2772 | ||
2773 | if (fun->visit4) | |
2774 | return TRUE; | |
2775 | ||
2776 | fun->visit4 = TRUE; | |
2777 | if (!fun->sec->linker_mark) | |
2778 | { | |
2779 | fun->sec->linker_mark = 1; | |
2780 | fun->sec->gc_mark = 1; | |
2781 | fun->sec->segment_mark = 0; | |
2782 | /* Ensure SEC_CODE is set on this text section (it ought to | |
2783 | be!), and SEC_CODE is clear on rodata sections. We use | |
2784 | this flag to differentiate the two overlay section types. */ | |
2785 | fun->sec->flags |= SEC_CODE; | |
2786 | if (spu_hash_table (info)->auto_overlay & OVERLAY_RODATA) | |
2787 | { | |
2788 | char *name = NULL; | |
2789 | unsigned int size; | |
2790 | ||
2791 | /* Find the rodata section corresponding to this function's | |
2792 | text section. */ | |
2793 | if (strcmp (fun->sec->name, ".text") == 0) | |
2794 | { | |
2795 | name = bfd_malloc (sizeof (".rodata")); | |
2796 | if (name == NULL) | |
2797 | return FALSE; | |
2798 | memcpy (name, ".rodata", sizeof (".rodata")); | |
2799 | } | |
2800 | else if (strncmp (fun->sec->name, ".text.", 6) == 0) | |
2801 | { | |
2802 | size_t len = strlen (fun->sec->name); | |
2803 | name = bfd_malloc (len + 3); | |
2804 | if (name == NULL) | |
2805 | return FALSE; | |
2806 | memcpy (name, ".rodata", sizeof (".rodata")); | |
2807 | memcpy (name + 7, fun->sec->name + 5, len - 4); | |
2808 | } | |
2809 | else if (strncmp (fun->sec->name, ".gnu.linkonce.t.", 16) == 0) | |
2810 | { | |
2811 | size_t len = strlen (fun->sec->name) + 1; | |
2812 | name = bfd_malloc (len); | |
2813 | if (name == NULL) | |
2814 | return FALSE; | |
2815 | memcpy (name, fun->sec->name, len); | |
2816 | name[14] = 'r'; | |
2817 | } | |
2818 | ||
2819 | if (name != NULL) | |
2820 | { | |
2821 | asection *rodata = NULL; | |
2822 | asection *group_sec = elf_section_data (fun->sec)->next_in_group; | |
2823 | if (group_sec == NULL) | |
2824 | rodata = bfd_get_section_by_name (fun->sec->owner, name); | |
2825 | else | |
2826 | while (group_sec != NULL && group_sec != fun->sec) | |
2827 | { | |
2828 | if (strcmp (group_sec->name, name) == 0) | |
2829 | { | |
2830 | rodata = group_sec; | |
2831 | break; | |
2832 | } | |
2833 | group_sec = elf_section_data (group_sec)->next_in_group; | |
2834 | } | |
2835 | fun->rodata = rodata; | |
2836 | if (fun->rodata) | |
2837 | { | |
2838 | fun->rodata->linker_mark = 1; | |
2839 | fun->rodata->gc_mark = 1; | |
2840 | fun->rodata->flags &= ~SEC_CODE; | |
2841 | } | |
2842 | free (name); | |
2843 | } | |
2844 | size = fun->sec->size; | |
2845 | if (fun->rodata) | |
2846 | size += fun->rodata->size; | |
2847 | if (mos_param->max_overlay_size < size) | |
2848 | mos_param->max_overlay_size = size; | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | for (count = 0, call = fun->call_list; call != NULL; call = call->next) | |
2853 | count += 1; | |
2854 | ||
2855 | if (count > 1) | |
2856 | { | |
2857 | struct call_info **calls = bfd_malloc (count * sizeof (*calls)); | |
2858 | if (calls == NULL) | |
2859 | return FALSE; | |
2860 | ||
2861 | for (count = 0, call = fun->call_list; call != NULL; call = call->next) | |
2862 | calls[count++] = call; | |
2863 | ||
2864 | qsort (calls, count, sizeof (*calls), sort_calls); | |
2865 | ||
2866 | fun->call_list = NULL; | |
2867 | while (count != 0) | |
2868 | { | |
2869 | --count; | |
2870 | calls[count]->next = fun->call_list; | |
2871 | fun->call_list = calls[count]; | |
2872 | } | |
2873 | free (calls); | |
2874 | } | |
2875 | ||
2876 | for (call = fun->call_list; call != NULL; call = call->next) | |
2877 | { | |
2878 | if (call->is_pasted) | |
2879 | { | |
2880 | /* There can only be one is_pasted call per function_info. */ | |
2881 | BFD_ASSERT (!fun->sec->segment_mark); | |
2882 | fun->sec->segment_mark = 1; | |
2883 | } | |
2884 | if (!mark_overlay_section (call->fun, info, param)) | |
2885 | return FALSE; | |
2886 | } | |
2887 | ||
2888 | /* Don't put entry code into an overlay. The overlay manager needs | |
2889 | a stack! */ | |
2890 | if (fun->lo + fun->sec->output_offset + fun->sec->output_section->vma | |
2891 | == info->output_bfd->start_address) | |
2892 | { | |
2893 | fun->sec->linker_mark = 0; | |
2894 | if (fun->rodata != NULL) | |
2895 | fun->rodata->linker_mark = 0; | |
2896 | } | |
2897 | return TRUE; | |
2898 | } | |
2899 | ||
2900 | struct _uos_param { | |
2901 | asection *exclude_input_section; | |
2902 | asection *exclude_output_section; | |
2903 | unsigned long clearing; | |
2904 | }; | |
2905 | ||
2906 | /* Undo some of mark_overlay_section's work. */ | |
2907 | ||
2908 | static bfd_boolean | |
2909 | unmark_overlay_section (struct function_info *fun, | |
2910 | struct bfd_link_info *info, | |
2911 | void *param) | |
2912 | { | |
2913 | struct call_info *call; | |
2914 | struct _uos_param *uos_param = param; | |
2915 | unsigned int excluded = 0; | |
2916 | ||
2917 | if (fun->visit5) | |
2918 | return TRUE; | |
2919 | ||
2920 | fun->visit5 = TRUE; | |
2921 | ||
2922 | excluded = 0; | |
2923 | if (fun->sec == uos_param->exclude_input_section | |
2924 | || fun->sec->output_section == uos_param->exclude_output_section) | |
2925 | excluded = 1; | |
2926 | ||
2927 | uos_param->clearing += excluded; | |
2928 | ||
2929 | if (uos_param->clearing) | |
2930 | { | |
2931 | fun->sec->linker_mark = 0; | |
2932 | if (fun->rodata) | |
2933 | fun->rodata->linker_mark = 0; | |
2934 | } | |
2935 | ||
2936 | for (call = fun->call_list; call != NULL; call = call->next) | |
2937 | if (!unmark_overlay_section (call->fun, info, param)) | |
2938 | return FALSE; | |
2939 | ||
2940 | uos_param->clearing -= excluded; | |
2941 | return TRUE; | |
2942 | } | |
2943 | ||
2944 | struct _cl_param { | |
2945 | unsigned int lib_size; | |
2946 | asection **lib_sections; | |
2947 | }; | |
2948 | ||
2949 | /* Add sections we have marked as belonging to overlays to an array | |
2950 | for consideration as non-overlay sections. The array consist of | |
2951 | pairs of sections, (text,rodata), for functions in the call graph. */ | |
2952 | ||
2953 | static bfd_boolean | |
2954 | collect_lib_sections (struct function_info *fun, | |
2955 | struct bfd_link_info *info, | |
2956 | void *param) | |
2957 | { | |
2958 | struct _cl_param *lib_param = param; | |
2959 | struct call_info *call; | |
2960 | unsigned int size; | |
2961 | ||
2962 | if (fun->visit6) | |
2963 | return TRUE; | |
2964 | ||
2965 | fun->visit6 = TRUE; | |
2966 | if (!fun->sec->linker_mark || !fun->sec->gc_mark || fun->sec->segment_mark) | |
2967 | return TRUE; | |
2968 | ||
2969 | size = fun->sec->size; | |
2970 | if (fun->rodata) | |
2971 | size += fun->rodata->size; | |
2972 | if (size > lib_param->lib_size) | |
2973 | return TRUE; | |
2974 | ||
2975 | *lib_param->lib_sections++ = fun->sec; | |
2976 | fun->sec->gc_mark = 0; | |
2977 | if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark) | |
2978 | { | |
2979 | *lib_param->lib_sections++ = fun->rodata; | |
2980 | fun->rodata->gc_mark = 0; | |
2981 | } | |
2982 | else | |
2983 | *lib_param->lib_sections++ = NULL; | |
2984 | ||
2985 | for (call = fun->call_list; call != NULL; call = call->next) | |
2986 | collect_lib_sections (call->fun, info, param); | |
2987 | ||
2988 | return TRUE; | |
2989 | } | |
2990 | ||
2991 | /* qsort predicate to sort sections by call count. */ | |
2992 | ||
2993 | static int | |
2994 | sort_lib (const void *a, const void *b) | |
2995 | { | |
2996 | asection *const *s1 = a; | |
2997 | asection *const *s2 = b; | |
2998 | struct _spu_elf_section_data *sec_data; | |
2999 | struct spu_elf_stack_info *sinfo; | |
3000 | int delta; | |
3001 | ||
3002 | delta = 0; | |
3003 | if ((sec_data = spu_elf_section_data (*s1)) != NULL | |
3004 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
3005 | { | |
3006 | int i; | |
3007 | for (i = 0; i < sinfo->num_fun; ++i) | |
3008 | delta -= sinfo->fun[i].call_count; | |
3009 | } | |
3010 | ||
3011 | if ((sec_data = spu_elf_section_data (*s2)) != NULL | |
3012 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
3013 | { | |
3014 | int i; | |
3015 | for (i = 0; i < sinfo->num_fun; ++i) | |
3016 | delta += sinfo->fun[i].call_count; | |
3017 | } | |
3018 | ||
3019 | if (delta != 0) | |
3020 | return delta; | |
3021 | ||
3022 | return s1 - s2; | |
3023 | } | |
3024 | ||
3025 | /* Remove some sections from those marked to be in overlays. Choose | |
3026 | those that are called from many places, likely library functions. */ | |
3027 | ||
3028 | static unsigned int | |
3029 | auto_ovl_lib_functions (struct bfd_link_info *info, unsigned int lib_size) | |
3030 | { | |
3031 | bfd *ibfd; | |
3032 | asection **lib_sections; | |
3033 | unsigned int i, lib_count; | |
3034 | struct _cl_param collect_lib_param; | |
3035 | struct function_info dummy_caller; | |
3036 | ||
3037 | memset (&dummy_caller, 0, sizeof (dummy_caller)); | |
3038 | lib_count = 0; | |
3039 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
3040 | { | |
3041 | extern const bfd_target bfd_elf32_spu_vec; | |
3042 | asection *sec; | |
3043 | ||
3044 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
3045 | continue; | |
3046 | ||
3047 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
3048 | if (sec->linker_mark | |
3049 | && sec->size < lib_size | |
3050 | && (sec->flags & SEC_CODE) != 0) | |
3051 | lib_count += 1; | |
3052 | } | |
3053 | lib_sections = bfd_malloc (lib_count * 2 * sizeof (*lib_sections)); | |
3054 | if (lib_sections == NULL) | |
3055 | return (unsigned int) -1; | |
3056 | collect_lib_param.lib_size = lib_size; | |
3057 | collect_lib_param.lib_sections = lib_sections; | |
3058 | if (!for_each_node (collect_lib_sections, info, &collect_lib_param, | |
3059 | TRUE)) | |
3060 | return (unsigned int) -1; | |
3061 | lib_count = (collect_lib_param.lib_sections - lib_sections) / 2; | |
3062 | ||
3063 | /* Sort sections so that those with the most calls are first. */ | |
3064 | if (lib_count > 1) | |
3065 | qsort (lib_sections, lib_count, 2 * sizeof (*lib_sections), sort_lib); | |
3066 | ||
3067 | for (i = 0; i < lib_count; i++) | |
3068 | { | |
3069 | unsigned int tmp, stub_size; | |
3070 | asection *sec; | |
3071 | struct _spu_elf_section_data *sec_data; | |
3072 | struct spu_elf_stack_info *sinfo; | |
3073 | ||
3074 | sec = lib_sections[2 * i]; | |
3075 | /* If this section is OK, its size must be less than lib_size. */ | |
3076 | tmp = sec->size; | |
3077 | /* If it has a rodata section, then add that too. */ | |
3078 | if (lib_sections[2 * i + 1]) | |
3079 | tmp += lib_sections[2 * i + 1]->size; | |
3080 | /* Add any new overlay call stubs needed by the section. */ | |
3081 | stub_size = 0; | |
3082 | if (tmp < lib_size | |
3083 | && (sec_data = spu_elf_section_data (sec)) != NULL | |
3084 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
3085 | { | |
3086 | int k; | |
3087 | struct call_info *call; | |
3088 | ||
3089 | for (k = 0; k < sinfo->num_fun; ++k) | |
3090 | for (call = sinfo->fun[k].call_list; call; call = call->next) | |
3091 | if (call->fun->sec->linker_mark) | |
3092 | { | |
3093 | struct call_info *p; | |
3094 | for (p = dummy_caller.call_list; p; p = p->next) | |
3095 | if (p->fun == call->fun) | |
3096 | break; | |
3097 | if (!p) | |
3098 | stub_size += OVL_STUB_SIZE; | |
3099 | } | |
3100 | } | |
3101 | if (tmp + stub_size < lib_size) | |
3102 | { | |
3103 | struct call_info **pp, *p; | |
3104 | ||
3105 | /* This section fits. Mark it as non-overlay. */ | |
3106 | lib_sections[2 * i]->linker_mark = 0; | |
3107 | if (lib_sections[2 * i + 1]) | |
3108 | lib_sections[2 * i + 1]->linker_mark = 0; | |
3109 | lib_size -= tmp + stub_size; | |
3110 | /* Call stubs to the section we just added are no longer | |
3111 | needed. */ | |
3112 | pp = &dummy_caller.call_list; | |
3113 | while ((p = *pp) != NULL) | |
3114 | if (!p->fun->sec->linker_mark) | |
3115 | { | |
3116 | lib_size += OVL_STUB_SIZE; | |
3117 | *pp = p->next; | |
3118 | free (p); | |
3119 | } | |
3120 | else | |
3121 | pp = &p->next; | |
3122 | /* Add new call stubs to dummy_caller. */ | |
3123 | if ((sec_data = spu_elf_section_data (sec)) != NULL | |
3124 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
3125 | { | |
3126 | int k; | |
3127 | struct call_info *call; | |
3128 | ||
3129 | for (k = 0; k < sinfo->num_fun; ++k) | |
3130 | for (call = sinfo->fun[k].call_list; | |
3131 | call; | |
3132 | call = call->next) | |
3133 | if (call->fun->sec->linker_mark) | |
3134 | { | |
3135 | struct call_info *callee; | |
3136 | callee = bfd_malloc (sizeof (*callee)); | |
3137 | if (callee == NULL) | |
3138 | return (unsigned int) -1; | |
3139 | *callee = *call; | |
3140 | if (!insert_callee (&dummy_caller, callee)) | |
3141 | free (callee); | |
3142 | } | |
3143 | } | |
3144 | } | |
3145 | } | |
3146 | while (dummy_caller.call_list != NULL) | |
3147 | { | |
3148 | struct call_info *call = dummy_caller.call_list; | |
3149 | dummy_caller.call_list = call->next; | |
3150 | free (call); | |
3151 | } | |
3152 | for (i = 0; i < 2 * lib_count; i++) | |
3153 | if (lib_sections[i]) | |
3154 | lib_sections[i]->gc_mark = 1; | |
3155 | free (lib_sections); | |
3156 | return lib_size; | |
3157 | } | |
3158 | ||
3159 | /* Build an array of overlay sections. The deepest node's section is | |
2ec9638b | 3160 | added first, then its parent node's section, then everything called |
9dcc4794 AM |
3161 | from the parent section. The idea being to group sections to |
3162 | minimise calls between different overlays. */ | |
3163 | ||
3164 | static bfd_boolean | |
3165 | collect_overlays (struct function_info *fun, | |
3166 | struct bfd_link_info *info, | |
3167 | void *param) | |
3168 | { | |
3169 | struct call_info *call; | |
3170 | bfd_boolean added_fun; | |
3171 | asection ***ovly_sections = param; | |
3172 | ||
3173 | if (fun->visit7) | |
3174 | return TRUE; | |
3175 | ||
3176 | fun->visit7 = TRUE; | |
3177 | for (call = fun->call_list; call != NULL; call = call->next) | |
3178 | if (!call->is_pasted) | |
3179 | { | |
3180 | if (!collect_overlays (call->fun, info, ovly_sections)) | |
3181 | return FALSE; | |
3182 | break; | |
3183 | } | |
3184 | ||
3185 | added_fun = FALSE; | |
3186 | if (fun->sec->linker_mark && fun->sec->gc_mark) | |
3187 | { | |
3188 | fun->sec->gc_mark = 0; | |
3189 | *(*ovly_sections)++ = fun->sec; | |
3190 | if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark) | |
3191 | { | |
3192 | fun->rodata->gc_mark = 0; | |
3193 | *(*ovly_sections)++ = fun->rodata; | |
3194 | } | |
3195 | else | |
3196 | *(*ovly_sections)++ = NULL; | |
3197 | added_fun = TRUE; | |
3198 | ||
3199 | /* Pasted sections must stay with the first section. We don't | |
3200 | put pasted sections in the array, just the first section. | |
3201 | Mark subsequent sections as already considered. */ | |
3202 | if (fun->sec->segment_mark) | |
3203 | { | |
3204 | struct function_info *call_fun = fun; | |
3205 | do | |
3206 | { | |
3207 | for (call = call_fun->call_list; call != NULL; call = call->next) | |
3208 | if (call->is_pasted) | |
3209 | { | |
3210 | call_fun = call->fun; | |
3211 | call_fun->sec->gc_mark = 0; | |
3212 | if (call_fun->rodata) | |
3213 | call_fun->rodata->gc_mark = 0; | |
3214 | break; | |
3215 | } | |
3216 | if (call == NULL) | |
3217 | abort (); | |
3218 | } | |
3219 | while (call_fun->sec->segment_mark); | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | for (call = fun->call_list; call != NULL; call = call->next) | |
3224 | if (!collect_overlays (call->fun, info, ovly_sections)) | |
3225 | return FALSE; | |
3226 | ||
3227 | if (added_fun) | |
3228 | { | |
3229 | struct _spu_elf_section_data *sec_data; | |
3230 | struct spu_elf_stack_info *sinfo; | |
3231 | ||
3232 | if ((sec_data = spu_elf_section_data (fun->sec)) != NULL | |
3233 | && (sinfo = sec_data->u.i.stack_info) != NULL) | |
3234 | { | |
3235 | int i; | |
3236 | for (i = 0; i < sinfo->num_fun; ++i) | |
3237 | if (!collect_overlays (&sinfo->fun[i], info, ovly_sections)) | |
3238 | return FALSE; | |
3239 | } | |
3240 | } | |
3241 | ||
3242 | return TRUE; | |
49fa1e15 AM |
3243 | } |
3244 | ||
055ed83b AM |
3245 | struct _sum_stack_param { |
3246 | size_t cum_stack; | |
3247 | size_t overall_stack; | |
3248 | bfd_boolean emit_stack_syms; | |
3249 | }; | |
3250 | ||
49fa1e15 AM |
3251 | /* Descend the call graph for FUN, accumulating total stack required. */ |
3252 | ||
055ed83b | 3253 | static bfd_boolean |
49fa1e15 AM |
3254 | sum_stack (struct function_info *fun, |
3255 | struct bfd_link_info *info, | |
055ed83b | 3256 | void *param) |
49fa1e15 AM |
3257 | { |
3258 | struct call_info *call; | |
055ed83b AM |
3259 | struct function_info *max; |
3260 | size_t stack, cum_stack; | |
49fa1e15 | 3261 | const char *f1; |
9dcc4794 | 3262 | bfd_boolean has_call; |
055ed83b | 3263 | struct _sum_stack_param *sum_stack_param = param; |
9dcc4794 | 3264 | struct spu_link_hash_table *htab; |
49fa1e15 | 3265 | |
055ed83b AM |
3266 | cum_stack = fun->stack; |
3267 | sum_stack_param->cum_stack = cum_stack; | |
49fa1e15 | 3268 | if (fun->visit3) |
055ed83b | 3269 | return TRUE; |
49fa1e15 | 3270 | |
9dcc4794 | 3271 | has_call = FALSE; |
055ed83b | 3272 | max = NULL; |
49fa1e15 AM |
3273 | for (call = fun->call_list; call; call = call->next) |
3274 | { | |
9dcc4794 AM |
3275 | if (!call->is_pasted) |
3276 | has_call = TRUE; | |
055ed83b AM |
3277 | if (!sum_stack (call->fun, info, sum_stack_param)) |
3278 | return FALSE; | |
3279 | stack = sum_stack_param->cum_stack; | |
49fa1e15 AM |
3280 | /* Include caller stack for normal calls, don't do so for |
3281 | tail calls. fun->stack here is local stack usage for | |
3282 | this function. */ | |
9dcc4794 | 3283 | if (!call->is_tail || call->is_pasted || call->fun->start != NULL) |
49fa1e15 | 3284 | stack += fun->stack; |
055ed83b | 3285 | if (cum_stack < stack) |
49fa1e15 | 3286 | { |
055ed83b | 3287 | cum_stack = stack; |
49fa1e15 AM |
3288 | max = call->fun; |
3289 | } | |
3290 | } | |
3291 | ||
055ed83b AM |
3292 | sum_stack_param->cum_stack = cum_stack; |
3293 | stack = fun->stack; | |
3294 | /* Now fun->stack holds cumulative stack. */ | |
3295 | fun->stack = cum_stack; | |
3296 | fun->visit3 = TRUE; | |
3297 | ||
3298 | if (!fun->non_root | |
3299 | && sum_stack_param->overall_stack < cum_stack) | |
3300 | sum_stack_param->overall_stack = cum_stack; | |
3301 | ||
9dcc4794 AM |
3302 | htab = spu_hash_table (info); |
3303 | if (htab->auto_overlay) | |
3304 | return TRUE; | |
3305 | ||
49fa1e15 | 3306 | f1 = func_name (fun); |
055ed83b AM |
3307 | if (!fun->non_root) |
3308 | info->callbacks->info (_(" %s: 0x%v\n"), f1, (bfd_vma) cum_stack); | |
fad9eaf0 | 3309 | info->callbacks->minfo (_("%s: 0x%v 0x%v\n"), |
055ed83b | 3310 | f1, (bfd_vma) stack, (bfd_vma) cum_stack); |
49fa1e15 | 3311 | |
9dcc4794 | 3312 | if (has_call) |
49fa1e15 AM |
3313 | { |
3314 | info->callbacks->minfo (_(" calls:\n")); | |
3315 | for (call = fun->call_list; call; call = call->next) | |
9dcc4794 AM |
3316 | if (!call->is_pasted) |
3317 | { | |
3318 | const char *f2 = func_name (call->fun); | |
3319 | const char *ann1 = call->fun == max ? "*" : " "; | |
3320 | const char *ann2 = call->is_tail ? "t" : " "; | |
49fa1e15 | 3321 | |
9dcc4794 AM |
3322 | info->callbacks->minfo (_(" %s%s %s\n"), ann1, ann2, f2); |
3323 | } | |
49fa1e15 AM |
3324 | } |
3325 | ||
055ed83b | 3326 | if (sum_stack_param->emit_stack_syms) |
49fa1e15 | 3327 | { |
49fa1e15 AM |
3328 | char *name = bfd_malloc (18 + strlen (f1)); |
3329 | struct elf_link_hash_entry *h; | |
3330 | ||
055ed83b AM |
3331 | if (name == NULL) |
3332 | return FALSE; | |
3333 | ||
3334 | if (fun->global || ELF_ST_BIND (fun->u.sym->st_info) == STB_GLOBAL) | |
3335 | sprintf (name, "__stack_%s", f1); | |
3336 | else | |
3337 | sprintf (name, "__stack_%x_%s", fun->sec->id & 0xffffffff, f1); | |
3338 | ||
3339 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, TRUE, FALSE); | |
3340 | free (name); | |
3341 | if (h != NULL | |
3342 | && (h->root.type == bfd_link_hash_new | |
3343 | || h->root.type == bfd_link_hash_undefined | |
3344 | || h->root.type == bfd_link_hash_undefweak)) | |
49fa1e15 | 3345 | { |
055ed83b AM |
3346 | h->root.type = bfd_link_hash_defined; |
3347 | h->root.u.def.section = bfd_abs_section_ptr; | |
3348 | h->root.u.def.value = cum_stack; | |
3349 | h->size = 0; | |
3350 | h->type = 0; | |
3351 | h->ref_regular = 1; | |
3352 | h->def_regular = 1; | |
3353 | h->ref_regular_nonweak = 1; | |
3354 | h->forced_local = 1; | |
3355 | h->non_elf = 0; | |
49fa1e15 AM |
3356 | } |
3357 | } | |
3358 | ||
055ed83b | 3359 | return TRUE; |
49fa1e15 AM |
3360 | } |
3361 | ||
9dcc4794 AM |
3362 | /* SEC is part of a pasted function. Return the call_info for the |
3363 | next section of this function. */ | |
3364 | ||
3365 | static struct call_info * | |
3366 | find_pasted_call (asection *sec) | |
3367 | { | |
3368 | struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec); | |
3369 | struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info; | |
3370 | struct call_info *call; | |
3371 | int k; | |
3372 | ||
3373 | for (k = 0; k < sinfo->num_fun; ++k) | |
3374 | for (call = sinfo->fun[k].call_list; call != NULL; call = call->next) | |
3375 | if (call->is_pasted) | |
3376 | return call; | |
3377 | abort (); | |
3378 | return 0; | |
3379 | } | |
3380 | ||
3381 | /* qsort predicate to sort bfds by file name. */ | |
3382 | ||
3383 | static int | |
3384 | sort_bfds (const void *a, const void *b) | |
3385 | { | |
3386 | bfd *const *abfd1 = a; | |
3387 | bfd *const *abfd2 = b; | |
3388 | ||
3389 | return strcmp ((*abfd1)->filename, (*abfd2)->filename); | |
3390 | } | |
3391 | ||
3392 | /* Handle --auto-overlay. */ | |
3393 | ||
3394 | static void spu_elf_auto_overlay (struct bfd_link_info *, void (*) (void)) | |
3395 | ATTRIBUTE_NORETURN; | |
3396 | ||
3397 | static void | |
3398 | spu_elf_auto_overlay (struct bfd_link_info *info, | |
3399 | void (*spu_elf_load_ovl_mgr) (void)) | |
3400 | { | |
3401 | bfd *ibfd; | |
3402 | bfd **bfd_arr; | |
3403 | struct elf_segment_map *m; | |
3404 | unsigned int fixed_size, lo, hi; | |
3405 | struct spu_link_hash_table *htab; | |
3406 | unsigned int base, i, count, bfd_count; | |
3407 | int ovlynum; | |
3408 | asection **ovly_sections, **ovly_p; | |
3409 | FILE *script; | |
3410 | unsigned int total_overlay_size, overlay_size; | |
3411 | struct elf_link_hash_entry *h; | |
3412 | struct _mos_param mos_param; | |
3413 | struct _uos_param uos_param; | |
3414 | struct function_info dummy_caller; | |
3415 | ||
3416 | /* Find the extents of our loadable image. */ | |
3417 | lo = (unsigned int) -1; | |
3418 | hi = 0; | |
3419 | for (m = elf_tdata (info->output_bfd)->segment_map; m != NULL; m = m->next) | |
3420 | if (m->p_type == PT_LOAD) | |
3421 | for (i = 0; i < m->count; i++) | |
3422 | if (m->sections[i]->size != 0) | |
3423 | { | |
3424 | if (m->sections[i]->vma < lo) | |
3425 | lo = m->sections[i]->vma; | |
3426 | if (m->sections[i]->vma + m->sections[i]->size - 1 > hi) | |
3427 | hi = m->sections[i]->vma + m->sections[i]->size - 1; | |
3428 | } | |
3429 | fixed_size = hi + 1 - lo; | |
3430 | ||
3431 | if (!discover_functions (info)) | |
3432 | goto err_exit; | |
3433 | ||
3434 | if (!build_call_tree (info)) | |
3435 | goto err_exit; | |
3436 | ||
3437 | uos_param.exclude_input_section = 0; | |
3438 | uos_param.exclude_output_section | |
3439 | = bfd_get_section_by_name (info->output_bfd, ".interrupt"); | |
3440 | ||
3441 | htab = spu_hash_table (info); | |
3442 | h = elf_link_hash_lookup (&htab->elf, "__ovly_load", | |
3443 | FALSE, FALSE, FALSE); | |
3444 | if (h != NULL | |
3445 | && (h->root.type == bfd_link_hash_defined | |
3446 | || h->root.type == bfd_link_hash_defweak) | |
3447 | && h->def_regular) | |
3448 | { | |
3449 | /* We have a user supplied overlay manager. */ | |
3450 | uos_param.exclude_input_section = h->root.u.def.section; | |
3451 | } | |
3452 | else | |
3453 | { | |
3454 | /* If no user overlay manager, spu_elf_load_ovl_mgr will add our | |
3455 | builtin version to .text, and will adjust .text size. */ | |
3456 | asection *text = bfd_get_section_by_name (info->output_bfd, ".text"); | |
3457 | if (text != NULL) | |
3458 | fixed_size -= text->size; | |
3459 | spu_elf_load_ovl_mgr (); | |
3460 | text = bfd_get_section_by_name (info->output_bfd, ".text"); | |
3461 | if (text != NULL) | |
3462 | fixed_size += text->size; | |
3463 | } | |
3464 | ||
3465 | /* Mark overlay sections, and find max overlay section size. */ | |
3466 | mos_param.max_overlay_size = 0; | |
3467 | if (!for_each_node (mark_overlay_section, info, &mos_param, TRUE)) | |
3468 | goto err_exit; | |
3469 | ||
3470 | /* We can't put the overlay manager or interrupt routines in | |
3471 | overlays. */ | |
3472 | uos_param.clearing = 0; | |
3473 | if ((uos_param.exclude_input_section | |
3474 | || uos_param.exclude_output_section) | |
3475 | && !for_each_node (unmark_overlay_section, info, &uos_param, TRUE)) | |
3476 | goto err_exit; | |
3477 | ||
3478 | bfd_count = 0; | |
3479 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
3480 | ++bfd_count; | |
3481 | bfd_arr = bfd_malloc (bfd_count * sizeof (*bfd_arr)); | |
3482 | if (bfd_arr == NULL) | |
3483 | goto err_exit; | |
3484 | ||
3485 | /* Count overlay sections, and subtract their sizes from "fixed_size". */ | |
3486 | count = 0; | |
3487 | bfd_count = 0; | |
3488 | total_overlay_size = 0; | |
3489 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
3490 | { | |
3491 | extern const bfd_target bfd_elf32_spu_vec; | |
3492 | asection *sec; | |
3493 | unsigned int old_count; | |
3494 | ||
3495 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
3496 | continue; | |
3497 | ||
3498 | old_count = count; | |
3499 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
3500 | if (sec->linker_mark) | |
3501 | { | |
3502 | if ((sec->flags & SEC_CODE) != 0) | |
3503 | count += 1; | |
3504 | fixed_size -= sec->size; | |
3505 | total_overlay_size += sec->size; | |
3506 | } | |
3507 | if (count != old_count) | |
3508 | bfd_arr[bfd_count++] = ibfd; | |
3509 | } | |
3510 | ||
3511 | /* Since the overlay link script selects sections by file name and | |
3512 | section name, ensure that file names are unique. */ | |
3513 | if (bfd_count > 1) | |
3514 | { | |
3515 | bfd_boolean ok = TRUE; | |
3516 | ||
3517 | qsort (bfd_arr, bfd_count, sizeof (*bfd_arr), sort_bfds); | |
3518 | for (i = 1; i < bfd_count; ++i) | |
3519 | if (strcmp (bfd_arr[i - 1]->filename, bfd_arr[i]->filename) == 0) | |
3520 | { | |
3521 | if (bfd_arr[i - 1]->my_archive && bfd_arr[i]->my_archive) | |
3522 | { | |
3523 | if (bfd_arr[i - 1]->my_archive == bfd_arr[i]->my_archive) | |
3524 | info->callbacks->einfo (_("%s duplicated in %s\n"), | |
3525 | bfd_arr[i - 1]->filename, | |
3526 | bfd_arr[i - 1]->my_archive->filename); | |
3527 | else | |
3528 | info->callbacks->einfo (_("%s in both %s and %s\n"), | |
3529 | bfd_arr[i - 1]->filename, | |
3530 | bfd_arr[i - 1]->my_archive->filename, | |
3531 | bfd_arr[i]->my_archive->filename); | |
3532 | } | |
3533 | else if (bfd_arr[i - 1]->my_archive) | |
3534 | info->callbacks->einfo (_("%s in %s and as an object\n"), | |
3535 | bfd_arr[i - 1]->filename, | |
3536 | bfd_arr[i - 1]->my_archive->filename); | |
3537 | else if (bfd_arr[i]->my_archive) | |
3538 | info->callbacks->einfo (_("%s in %s and as an object\n"), | |
3539 | bfd_arr[i]->filename, | |
3540 | bfd_arr[i]->my_archive->filename); | |
3541 | else | |
3542 | info->callbacks->einfo (_("%s duplicated\n"), | |
3543 | bfd_arr[i]->filename); | |
3544 | ok = FALSE; | |
3545 | } | |
3546 | if (!ok) | |
3547 | { | |
3548 | /* FIXME: modify plain object files from foo.o to ./foo.o | |
3549 | and emit EXCLUDE_FILE to handle the duplicates in | |
3550 | archives. There is a pathological case we can't handle: | |
3551 | We may have duplicate file names within a single archive. */ | |
3552 | info->callbacks->einfo (_("sorry, no support for duplicate " | |
3553 | "object files in auto-overlay script\n")); | |
3554 | bfd_set_error (bfd_error_bad_value); | |
3555 | goto err_exit; | |
3556 | } | |
3557 | } | |
3558 | free (bfd_arr); | |
3559 | ||
3560 | if (htab->reserved == 0) | |
3561 | { | |
3562 | struct _sum_stack_param sum_stack_param; | |
3563 | ||
3564 | sum_stack_param.emit_stack_syms = 0; | |
3565 | sum_stack_param.overall_stack = 0; | |
3566 | if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE)) | |
3567 | goto err_exit; | |
3568 | htab->reserved = sum_stack_param.overall_stack; | |
3569 | } | |
3570 | fixed_size += htab->reserved; | |
3571 | fixed_size += htab->non_ovly_stub * OVL_STUB_SIZE; | |
3572 | if (fixed_size + mos_param.max_overlay_size <= htab->local_store) | |
3573 | { | |
3574 | /* Guess number of overlays. Assuming overlay buffer is on | |
3575 | average only half full should be conservative. */ | |
3576 | ovlynum = total_overlay_size * 2 / (htab->local_store - fixed_size); | |
3577 | /* Space for _ovly_table[], _ovly_buf_table[] and toe. */ | |
3578 | fixed_size += ovlynum * 16 + 16 + 4 + 16; | |
3579 | } | |
3580 | ||
3581 | if (fixed_size + mos_param.max_overlay_size > htab->local_store) | |
3582 | info->callbacks->einfo (_("non-overlay plus maximum overlay size " | |
3583 | "of 0x%x exceeds local store\n"), | |
3584 | fixed_size + mos_param.max_overlay_size); | |
3585 | ||
3586 | /* Now see if we should put some functions in the non-overlay area. */ | |
3587 | if (fixed_size < htab->overlay_fixed | |
3588 | && htab->overlay_fixed + mos_param.max_overlay_size < htab->local_store) | |
3589 | { | |
3590 | unsigned int lib_size = htab->overlay_fixed - fixed_size; | |
3591 | lib_size = auto_ovl_lib_functions (info, lib_size); | |
3592 | if (lib_size == (unsigned int) -1) | |
3593 | goto err_exit; | |
3594 | fixed_size = htab->overlay_fixed - lib_size; | |
3595 | } | |
3596 | ||
3597 | /* Build an array of sections, suitably sorted to place into | |
3598 | overlays. */ | |
3599 | ovly_sections = bfd_malloc (2 * count * sizeof (*ovly_sections)); | |
3600 | if (ovly_sections == NULL) | |
3601 | goto err_exit; | |
3602 | ovly_p = ovly_sections; | |
3603 | if (!for_each_node (collect_overlays, info, &ovly_p, TRUE)) | |
3604 | goto err_exit; | |
3605 | count = (size_t) (ovly_p - ovly_sections) / 2; | |
3606 | ||
3607 | script = htab->spu_elf_open_overlay_script (); | |
3608 | ||
3609 | if (fprintf (script, "SECTIONS\n{\n OVERLAY :\n {\n") <= 0) | |
3610 | goto file_err; | |
3611 | ||
3612 | memset (&dummy_caller, 0, sizeof (dummy_caller)); | |
3613 | overlay_size = htab->local_store - fixed_size; | |
3614 | base = 0; | |
3615 | ovlynum = 0; | |
3616 | while (base < count) | |
3617 | { | |
3618 | unsigned int size = 0; | |
3619 | unsigned int j; | |
3620 | ||
3621 | for (i = base; i < count; i++) | |
3622 | { | |
3623 | asection *sec; | |
3624 | unsigned int tmp; | |
3625 | unsigned int stub_size; | |
3626 | struct call_info *call, *pasty; | |
3627 | struct _spu_elf_section_data *sec_data; | |
3628 | struct spu_elf_stack_info *sinfo; | |
3629 | int k; | |
3630 | ||
3631 | /* See whether we can add this section to the current | |
3632 | overlay without overflowing our overlay buffer. */ | |
3633 | sec = ovly_sections[2 * i]; | |
3634 | tmp = size + sec->size; | |
3635 | if (ovly_sections[2 * i + 1]) | |
3636 | tmp += ovly_sections[2 * i + 1]->size; | |
3637 | if (tmp > overlay_size) | |
3638 | break; | |
3639 | if (sec->segment_mark) | |
3640 | { | |
3641 | /* Pasted sections must stay together, so add their | |
3642 | sizes too. */ | |
3643 | struct call_info *pasty = find_pasted_call (sec); | |
3644 | while (pasty != NULL) | |
3645 | { | |
3646 | struct function_info *call_fun = pasty->fun; | |
3647 | tmp += call_fun->sec->size; | |
3648 | if (call_fun->rodata) | |
3649 | tmp += call_fun->rodata->size; | |
3650 | for (pasty = call_fun->call_list; pasty; pasty = pasty->next) | |
3651 | if (pasty->is_pasted) | |
3652 | break; | |
3653 | } | |
3654 | } | |
3655 | if (tmp > overlay_size) | |
3656 | break; | |
3657 | ||
3658 | /* If we add this section, we might need new overlay call | |
3659 | stubs. Add any overlay section calls to dummy_call. */ | |
3660 | pasty = NULL; | |
3661 | sec_data = spu_elf_section_data (sec); | |
3662 | sinfo = sec_data->u.i.stack_info; | |
3663 | for (k = 0; k < sinfo->num_fun; ++k) | |
3664 | for (call = sinfo->fun[k].call_list; call; call = call->next) | |
3665 | if (call->is_pasted) | |
3666 | { | |
3667 | BFD_ASSERT (pasty == NULL); | |
3668 | pasty = call; | |
3669 | } | |
3670 | else if (call->fun->sec->linker_mark) | |
3671 | { | |
3672 | if (!copy_callee (&dummy_caller, call)) | |
3673 | goto err_exit; | |
3674 | } | |
3675 | while (pasty != NULL) | |
3676 | { | |
3677 | struct function_info *call_fun = pasty->fun; | |
3678 | pasty = NULL; | |
3679 | for (call = call_fun->call_list; call; call = call->next) | |
3680 | if (call->is_pasted) | |
3681 | { | |
3682 | BFD_ASSERT (pasty == NULL); | |
3683 | pasty = call; | |
3684 | } | |
3685 | else if (!copy_callee (&dummy_caller, call)) | |
3686 | goto err_exit; | |
3687 | } | |
3688 | ||
3689 | /* Calculate call stub size. */ | |
3690 | stub_size = 0; | |
3691 | for (call = dummy_caller.call_list; call; call = call->next) | |
3692 | { | |
3693 | unsigned int k; | |
3694 | ||
3695 | stub_size += OVL_STUB_SIZE; | |
3696 | /* If the call is within this overlay, we won't need a | |
3697 | stub. */ | |
3698 | for (k = base; k < i + 1; k++) | |
3699 | if (call->fun->sec == ovly_sections[2 * k]) | |
3700 | { | |
3701 | stub_size -= OVL_STUB_SIZE; | |
3702 | break; | |
3703 | } | |
3704 | } | |
3705 | if (tmp + stub_size > overlay_size) | |
3706 | break; | |
3707 | ||
3708 | size = tmp; | |
3709 | } | |
3710 | ||
3711 | if (i == base) | |
3712 | { | |
3713 | info->callbacks->einfo (_("%B:%A%s exceeds overlay size\n"), | |
3714 | ovly_sections[2 * i]->owner, | |
3715 | ovly_sections[2 * i], | |
3716 | ovly_sections[2 * i + 1] ? " + rodata" : ""); | |
3717 | bfd_set_error (bfd_error_bad_value); | |
3718 | goto err_exit; | |
3719 | } | |
3720 | ||
3721 | if (fprintf (script, " .ovly%d {\n", ++ovlynum) <= 0) | |
3722 | goto file_err; | |
3723 | for (j = base; j < i; j++) | |
3724 | { | |
3725 | asection *sec = ovly_sections[2 * j]; | |
3726 | ||
3727 | if (fprintf (script, " [%c]%s (%s)\n", | |
3728 | sec->owner->filename[0], | |
3729 | sec->owner->filename + 1, | |
3730 | sec->name) <= 0) | |
3731 | goto file_err; | |
3732 | if (sec->segment_mark) | |
3733 | { | |
3734 | struct call_info *call = find_pasted_call (sec); | |
3735 | while (call != NULL) | |
3736 | { | |
3737 | struct function_info *call_fun = call->fun; | |
3738 | sec = call_fun->sec; | |
3739 | if (fprintf (script, " [%c]%s (%s)\n", | |
3740 | sec->owner->filename[0], | |
3741 | sec->owner->filename + 1, | |
3742 | sec->name) <= 0) | |
3743 | goto file_err; | |
3744 | for (call = call_fun->call_list; call; call = call->next) | |
3745 | if (call->is_pasted) | |
3746 | break; | |
3747 | } | |
3748 | } | |
3749 | } | |
3750 | ||
3751 | for (j = base; j < i; j++) | |
3752 | { | |
3753 | asection *sec = ovly_sections[2 * j + 1]; | |
3754 | if (sec != NULL && fprintf (script, " [%c]%s (%s)\n", | |
3755 | sec->owner->filename[0], | |
3756 | sec->owner->filename + 1, | |
3757 | sec->name) <= 0) | |
3758 | goto file_err; | |
3759 | ||
3760 | sec = ovly_sections[2 * j]; | |
3761 | if (sec->segment_mark) | |
3762 | { | |
3763 | struct call_info *call = find_pasted_call (sec); | |
3764 | while (call != NULL) | |
3765 | { | |
3766 | struct function_info *call_fun = call->fun; | |
3767 | sec = call_fun->rodata; | |
3768 | if (sec != NULL && fprintf (script, " [%c]%s (%s)\n", | |
3769 | sec->owner->filename[0], | |
3770 | sec->owner->filename + 1, | |
3771 | sec->name) <= 0) | |
3772 | goto file_err; | |
3773 | for (call = call_fun->call_list; call; call = call->next) | |
3774 | if (call->is_pasted) | |
3775 | break; | |
3776 | } | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | if (fprintf (script, " }\n") <= 0) | |
3781 | goto file_err; | |
3782 | ||
3783 | while (dummy_caller.call_list != NULL) | |
3784 | { | |
3785 | struct call_info *call = dummy_caller.call_list; | |
3786 | dummy_caller.call_list = call->next; | |
3787 | free (call); | |
3788 | } | |
3789 | ||
3790 | base = i; | |
3791 | } | |
3792 | free (ovly_sections); | |
3793 | ||
3794 | if (fprintf (script, " }\n}\nINSERT AFTER .text;\n") <= 0) | |
3795 | goto file_err; | |
3796 | if (fclose (script) != 0) | |
3797 | goto file_err; | |
3798 | ||
3799 | if (htab->auto_overlay & AUTO_RELINK) | |
3800 | htab->spu_elf_relink (); | |
3801 | ||
3802 | xexit (0); | |
3803 | ||
3804 | file_err: | |
3805 | bfd_set_error (bfd_error_system_call); | |
3806 | err_exit: | |
3807 | info->callbacks->einfo ("%F%P: auto overlay error: %E\n"); | |
3808 | xexit (1); | |
3809 | } | |
3810 | ||
49fa1e15 AM |
3811 | /* Provide an estimate of total stack required. */ |
3812 | ||
3813 | static bfd_boolean | |
c65be8d7 | 3814 | spu_elf_stack_analysis (struct bfd_link_info *info, int emit_stack_syms) |
49fa1e15 | 3815 | { |
055ed83b | 3816 | struct _sum_stack_param sum_stack_param; |
49fa1e15 | 3817 | |
c65be8d7 | 3818 | if (!discover_functions (info)) |
49fa1e15 AM |
3819 | return FALSE; |
3820 | ||
c65be8d7 | 3821 | if (!build_call_tree (info)) |
49fa1e15 AM |
3822 | return FALSE; |
3823 | ||
3824 | info->callbacks->info (_("Stack size for call graph root nodes.\n")); | |
3825 | info->callbacks->minfo (_("\nStack size for functions. " | |
3826 | "Annotations: '*' max stack, 't' tail call\n")); | |
49fa1e15 | 3827 | |
055ed83b AM |
3828 | sum_stack_param.emit_stack_syms = emit_stack_syms; |
3829 | sum_stack_param.overall_stack = 0; | |
3830 | if (!for_each_node (sum_stack, info, &sum_stack_param, TRUE)) | |
3831 | return FALSE; | |
49fa1e15 | 3832 | |
055ed83b AM |
3833 | info->callbacks->info (_("Maximum stack required is 0x%v\n"), |
3834 | (bfd_vma) sum_stack_param.overall_stack); | |
49fa1e15 AM |
3835 | return TRUE; |
3836 | } | |
3837 | ||
3838 | /* Perform a final link. */ | |
3839 | ||
3840 | static bfd_boolean | |
3841 | spu_elf_final_link (bfd *output_bfd, struct bfd_link_info *info) | |
3842 | { | |
3843 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
3844 | ||
9dcc4794 AM |
3845 | if (htab->auto_overlay) |
3846 | spu_elf_auto_overlay (info, htab->spu_elf_load_ovl_mgr); | |
3847 | ||
49fa1e15 | 3848 | if (htab->stack_analysis |
c65be8d7 | 3849 | && !spu_elf_stack_analysis (info, htab->emit_stack_syms)) |
49fa1e15 AM |
3850 | info->callbacks->einfo ("%X%P: stack analysis error: %E\n"); |
3851 | ||
3852 | return bfd_elf_final_link (output_bfd, info); | |
3853 | } | |
3854 | ||
ece5ef60 AM |
3855 | /* Called when not normally emitting relocs, ie. !info->relocatable |
3856 | and !info->emitrelocations. Returns a count of special relocs | |
3857 | that need to be emitted. */ | |
3858 | ||
3859 | static unsigned int | |
3860 | spu_elf_count_relocs (asection *sec, Elf_Internal_Rela *relocs) | |
3861 | { | |
3862 | unsigned int count = 0; | |
3863 | Elf_Internal_Rela *relend = relocs + sec->reloc_count; | |
3864 | ||
3865 | for (; relocs < relend; relocs++) | |
3866 | { | |
3867 | int r_type = ELF32_R_TYPE (relocs->r_info); | |
3868 | if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64) | |
3869 | ++count; | |
3870 | } | |
3871 | ||
3872 | return count; | |
3873 | } | |
3874 | ||
e9f53129 AM |
3875 | /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */ |
3876 | ||
d16c7321 | 3877 | static int |
e9f53129 AM |
3878 | spu_elf_relocate_section (bfd *output_bfd, |
3879 | struct bfd_link_info *info, | |
3880 | bfd *input_bfd, | |
3881 | asection *input_section, | |
3882 | bfd_byte *contents, | |
3883 | Elf_Internal_Rela *relocs, | |
3884 | Elf_Internal_Sym *local_syms, | |
3885 | asection **local_sections) | |
3886 | { | |
3887 | Elf_Internal_Shdr *symtab_hdr; | |
3888 | struct elf_link_hash_entry **sym_hashes; | |
3889 | Elf_Internal_Rela *rel, *relend; | |
3890 | struct spu_link_hash_table *htab; | |
8374f9d4 | 3891 | asection *ea = bfd_get_section_by_name (output_bfd, "._ea"); |
d16c7321 | 3892 | int ret = TRUE; |
ece5ef60 | 3893 | bfd_boolean emit_these_relocs = FALSE; |
8374f9d4 | 3894 | bfd_boolean is_ea; |
fdba2fcd | 3895 | bfd_boolean stubs; |
e9f53129 | 3896 | |
e9f53129 | 3897 | htab = spu_hash_table (info); |
fdba2fcd AM |
3898 | stubs = (htab->stub_sec != NULL |
3899 | && maybe_needs_stubs (input_section, output_bfd)); | |
e9f53129 AM |
3900 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
3901 | sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd)); | |
3902 | ||
3903 | rel = relocs; | |
3904 | relend = relocs + input_section->reloc_count; | |
3905 | for (; rel < relend; rel++) | |
3906 | { | |
3907 | int r_type; | |
3908 | reloc_howto_type *howto; | |
8374f9d4 | 3909 | unsigned int r_symndx; |
e9f53129 AM |
3910 | Elf_Internal_Sym *sym; |
3911 | asection *sec; | |
3912 | struct elf_link_hash_entry *h; | |
3913 | const char *sym_name; | |
3914 | bfd_vma relocation; | |
3915 | bfd_vma addend; | |
3916 | bfd_reloc_status_type r; | |
3917 | bfd_boolean unresolved_reloc; | |
3918 | bfd_boolean warned; | |
3919 | ||
3920 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3921 | r_type = ELF32_R_TYPE (rel->r_info); | |
3922 | howto = elf_howto_table + r_type; | |
3923 | unresolved_reloc = FALSE; | |
3924 | warned = FALSE; | |
e9f53129 AM |
3925 | h = NULL; |
3926 | sym = NULL; | |
3927 | sec = NULL; | |
3928 | if (r_symndx < symtab_hdr->sh_info) | |
3929 | { | |
3930 | sym = local_syms + r_symndx; | |
3931 | sec = local_sections[r_symndx]; | |
3932 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); | |
3933 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
3934 | } | |
3935 | else | |
3936 | { | |
3937 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
3938 | r_symndx, symtab_hdr, sym_hashes, | |
3939 | h, sec, relocation, | |
3940 | unresolved_reloc, warned); | |
3941 | sym_name = h->root.root.string; | |
3942 | } | |
3943 | ||
ab96bf03 AM |
3944 | if (sec != NULL && elf_discarded_section (sec)) |
3945 | { | |
3946 | /* For relocs against symbols from removed linkonce sections, | |
3947 | or sections discarded by a linker script, we just want the | |
3948 | section contents zeroed. Avoid any special processing. */ | |
3949 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
3950 | rel->r_info = 0; | |
3951 | rel->r_addend = 0; | |
3952 | continue; | |
3953 | } | |
3954 | ||
3955 | if (info->relocatable) | |
3956 | continue; | |
3957 | ||
8374f9d4 AM |
3958 | is_ea = (ea != NULL |
3959 | && sec != NULL | |
3960 | && sec->output_section == ea); | |
3961 | if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64) | |
3962 | { | |
3963 | if (is_ea) | |
3964 | { | |
3965 | /* ._ea is a special section that isn't allocated in SPU | |
3966 | memory, but rather occupies space in PPU memory as | |
3967 | part of an embedded ELF image. If this reloc is | |
3968 | against a symbol defined in ._ea, then transform the | |
3969 | reloc into an equivalent one without a symbol | |
3970 | relative to the start of the ELF image. */ | |
3971 | rel->r_addend += (relocation | |
3972 | - ea->vma | |
3973 | + elf_section_data (ea)->this_hdr.sh_offset); | |
3974 | rel->r_info = ELF32_R_INFO (0, r_type); | |
3975 | } | |
3976 | emit_these_relocs = TRUE; | |
3977 | continue; | |
3978 | } | |
3979 | ||
3980 | if (is_ea) | |
3981 | unresolved_reloc = TRUE; | |
3982 | ||
e9f53129 AM |
3983 | if (unresolved_reloc) |
3984 | { | |
3985 | (*_bfd_error_handler) | |
3986 | (_("%B(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
3987 | input_bfd, | |
3988 | bfd_get_section_name (input_bfd, input_section), | |
3989 | (long) rel->r_offset, | |
3990 | howto->name, | |
3991 | sym_name); | |
3992 | ret = FALSE; | |
3993 | } | |
3994 | ||
3995 | /* If this symbol is in an overlay area, we may need to relocate | |
3996 | to the overlay stub. */ | |
3997 | addend = rel->r_addend; | |
fdba2fcd | 3998 | if (stubs) |
e9f53129 | 3999 | { |
fdba2fcd | 4000 | enum _stub_type stub_type; |
47f6dab9 | 4001 | |
fdba2fcd AM |
4002 | stub_type = needs_ovl_stub (h, sym, sec, input_section, rel, |
4003 | contents, info); | |
4004 | if (stub_type != no_stub) | |
5f5fb9ec AM |
4005 | { |
4006 | unsigned int ovl = 0; | |
4007 | struct got_entry *g, **head; | |
4008 | ||
fdba2fcd | 4009 | if (stub_type != nonovl_stub) |
5f5fb9ec AM |
4010 | ovl = (spu_elf_section_data (input_section->output_section) |
4011 | ->u.o.ovl_index); | |
4012 | ||
4013 | if (h != NULL) | |
4014 | head = &h->got.glist; | |
4015 | else | |
4016 | head = elf_local_got_ents (input_bfd) + r_symndx; | |
47f6dab9 | 4017 | |
5f5fb9ec AM |
4018 | for (g = *head; g != NULL; g = g->next) |
4019 | if (g->addend == addend && (g->ovl == ovl || g->ovl == 0)) | |
4020 | break; | |
4021 | if (g == NULL) | |
4022 | abort (); | |
4023 | ||
4024 | relocation = g->stub_addr; | |
4025 | addend = 0; | |
4026 | } | |
e9f53129 AM |
4027 | } |
4028 | ||
4029 | r = _bfd_final_link_relocate (howto, | |
4030 | input_bfd, | |
4031 | input_section, | |
4032 | contents, | |
4033 | rel->r_offset, relocation, addend); | |
4034 | ||
4035 | if (r != bfd_reloc_ok) | |
4036 | { | |
4037 | const char *msg = (const char *) 0; | |
4038 | ||
4039 | switch (r) | |
4040 | { | |
4041 | case bfd_reloc_overflow: | |
4042 | if (!((*info->callbacks->reloc_overflow) | |
4043 | (info, (h ? &h->root : NULL), sym_name, howto->name, | |
4044 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) | |
4045 | return FALSE; | |
4046 | break; | |
4047 | ||
4048 | case bfd_reloc_undefined: | |
4049 | if (!((*info->callbacks->undefined_symbol) | |
4050 | (info, sym_name, input_bfd, input_section, | |
4051 | rel->r_offset, TRUE))) | |
4052 | return FALSE; | |
4053 | break; | |
4054 | ||
4055 | case bfd_reloc_outofrange: | |
4056 | msg = _("internal error: out of range error"); | |
4057 | goto common_error; | |
4058 | ||
4059 | case bfd_reloc_notsupported: | |
4060 | msg = _("internal error: unsupported relocation error"); | |
4061 | goto common_error; | |
4062 | ||
4063 | case bfd_reloc_dangerous: | |
4064 | msg = _("internal error: dangerous error"); | |
4065 | goto common_error; | |
4066 | ||
4067 | default: | |
4068 | msg = _("internal error: unknown error"); | |
4069 | /* fall through */ | |
4070 | ||
4071 | common_error: | |
d16c7321 | 4072 | ret = FALSE; |
e9f53129 AM |
4073 | if (!((*info->callbacks->warning) |
4074 | (info, msg, sym_name, input_bfd, input_section, | |
4075 | rel->r_offset))) | |
4076 | return FALSE; | |
4077 | break; | |
4078 | } | |
4079 | } | |
4080 | } | |
4081 | ||
ece5ef60 AM |
4082 | if (ret |
4083 | && emit_these_relocs | |
ece5ef60 AM |
4084 | && !info->emitrelocations) |
4085 | { | |
4086 | Elf_Internal_Rela *wrel; | |
4087 | Elf_Internal_Shdr *rel_hdr; | |
4088 | ||
4089 | wrel = rel = relocs; | |
4090 | relend = relocs + input_section->reloc_count; | |
4091 | for (; rel < relend; rel++) | |
4092 | { | |
4093 | int r_type; | |
4094 | ||
4095 | r_type = ELF32_R_TYPE (rel->r_info); | |
4096 | if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64) | |
4097 | *wrel++ = *rel; | |
4098 | } | |
4099 | input_section->reloc_count = wrel - relocs; | |
4100 | /* Backflips for _bfd_elf_link_output_relocs. */ | |
4101 | rel_hdr = &elf_section_data (input_section)->rel_hdr; | |
4102 | rel_hdr->sh_size = input_section->reloc_count * rel_hdr->sh_entsize; | |
4103 | ret = 2; | |
4104 | } | |
4105 | ||
e9f53129 AM |
4106 | return ret; |
4107 | } | |
4108 | ||
c1b2796f AM |
4109 | /* Adjust _SPUEAR_ syms to point at their overlay stubs. */ |
4110 | ||
4111 | static bfd_boolean | |
4112 | spu_elf_output_symbol_hook (struct bfd_link_info *info, | |
4113 | const char *sym_name ATTRIBUTE_UNUSED, | |
4114 | Elf_Internal_Sym *sym, | |
4115 | asection *sym_sec ATTRIBUTE_UNUSED, | |
4116 | struct elf_link_hash_entry *h) | |
4117 | { | |
4118 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
4119 | ||
4120 | if (!info->relocatable | |
47f6dab9 | 4121 | && htab->stub_sec != NULL |
c1b2796f AM |
4122 | && h != NULL |
4123 | && (h->root.type == bfd_link_hash_defined | |
4124 | || h->root.type == bfd_link_hash_defweak) | |
4125 | && h->def_regular | |
4126 | && strncmp (h->root.root.string, "_SPUEAR_", 8) == 0) | |
4127 | { | |
4a628337 | 4128 | struct got_entry *g; |
c1b2796f | 4129 | |
4a628337 AM |
4130 | for (g = h->got.glist; g != NULL; g = g->next) |
4131 | if (g->addend == 0 && g->ovl == 0) | |
4132 | { | |
4133 | sym->st_shndx = (_bfd_elf_section_from_bfd_section | |
4134 | (htab->stub_sec[0]->output_section->owner, | |
4135 | htab->stub_sec[0]->output_section)); | |
4136 | sym->st_value = g->stub_addr; | |
4137 | break; | |
4138 | } | |
c1b2796f AM |
4139 | } |
4140 | ||
4141 | return TRUE; | |
4142 | } | |
4143 | ||
e9f53129 AM |
4144 | static int spu_plugin = 0; |
4145 | ||
4146 | void | |
4147 | spu_elf_plugin (int val) | |
4148 | { | |
4149 | spu_plugin = val; | |
4150 | } | |
4151 | ||
4152 | /* Set ELF header e_type for plugins. */ | |
4153 | ||
4154 | static void | |
4155 | spu_elf_post_process_headers (bfd *abfd, | |
4156 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
4157 | { | |
4158 | if (spu_plugin) | |
4159 | { | |
4160 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
4161 | ||
4162 | i_ehdrp->e_type = ET_DYN; | |
4163 | } | |
4164 | } | |
4165 | ||
4166 | /* We may add an extra PT_LOAD segment for .toe. We also need extra | |
4167 | segments for overlays. */ | |
4168 | ||
4169 | static int | |
4170 | spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info) | |
4171 | { | |
4172 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
4173 | int extra = htab->num_overlays; | |
4174 | asection *sec; | |
4175 | ||
4176 | if (extra) | |
4177 | ++extra; | |
4178 | ||
4179 | sec = bfd_get_section_by_name (abfd, ".toe"); | |
4180 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) | |
4181 | ++extra; | |
4182 | ||
4183 | return extra; | |
4184 | } | |
4185 | ||
4186 | /* Remove .toe section from other PT_LOAD segments and put it in | |
4187 | a segment of its own. Put overlays in separate segments too. */ | |
4188 | ||
4189 | static bfd_boolean | |
4190 | spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info) | |
4191 | { | |
4192 | asection *toe, *s; | |
4193 | struct elf_segment_map *m; | |
4194 | unsigned int i; | |
4195 | ||
4196 | if (info == NULL) | |
4197 | return TRUE; | |
4198 | ||
4199 | toe = bfd_get_section_by_name (abfd, ".toe"); | |
4200 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
4201 | if (m->p_type == PT_LOAD && m->count > 1) | |
4202 | for (i = 0; i < m->count; i++) | |
4203 | if ((s = m->sections[i]) == toe | |
47f6dab9 | 4204 | || spu_elf_section_data (s)->u.o.ovl_index != 0) |
e9f53129 AM |
4205 | { |
4206 | struct elf_segment_map *m2; | |
4207 | bfd_vma amt; | |
4208 | ||
4209 | if (i + 1 < m->count) | |
4210 | { | |
4211 | amt = sizeof (struct elf_segment_map); | |
4212 | amt += (m->count - (i + 2)) * sizeof (m->sections[0]); | |
4213 | m2 = bfd_zalloc (abfd, amt); | |
4214 | if (m2 == NULL) | |
4215 | return FALSE; | |
4216 | m2->count = m->count - (i + 1); | |
4217 | memcpy (m2->sections, m->sections + i + 1, | |
4218 | m2->count * sizeof (m->sections[0])); | |
4219 | m2->p_type = PT_LOAD; | |
4220 | m2->next = m->next; | |
4221 | m->next = m2; | |
4222 | } | |
4223 | m->count = 1; | |
4224 | if (i != 0) | |
4225 | { | |
4226 | m->count = i; | |
4227 | amt = sizeof (struct elf_segment_map); | |
4228 | m2 = bfd_zalloc (abfd, amt); | |
4229 | if (m2 == NULL) | |
4230 | return FALSE; | |
4231 | m2->p_type = PT_LOAD; | |
4232 | m2->count = 1; | |
4233 | m2->sections[0] = s; | |
4234 | m2->next = m->next; | |
4235 | m->next = m2; | |
4236 | } | |
4237 | break; | |
4238 | } | |
4239 | ||
4240 | return TRUE; | |
4241 | } | |
4242 | ||
7d3287cb AM |
4243 | /* Tweak the section type of .note.spu_name. */ |
4244 | ||
4245 | static bfd_boolean | |
4246 | spu_elf_fake_sections (bfd *obfd ATTRIBUTE_UNUSED, | |
4247 | Elf_Internal_Shdr *hdr, | |
4248 | asection *sec) | |
4249 | { | |
4250 | if (strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0) | |
4251 | hdr->sh_type = SHT_NOTE; | |
4252 | return TRUE; | |
4253 | } | |
4254 | ||
e9f53129 AM |
4255 | /* Tweak phdrs before writing them out. */ |
4256 | ||
4257 | static int | |
4258 | spu_elf_modify_program_headers (bfd *abfd, struct bfd_link_info *info) | |
4259 | { | |
4260 | const struct elf_backend_data *bed; | |
4261 | struct elf_obj_tdata *tdata; | |
4262 | Elf_Internal_Phdr *phdr, *last; | |
4263 | struct spu_link_hash_table *htab; | |
4264 | unsigned int count; | |
4265 | unsigned int i; | |
4266 | ||
4267 | if (info == NULL) | |
4268 | return TRUE; | |
4269 | ||
4270 | bed = get_elf_backend_data (abfd); | |
4271 | tdata = elf_tdata (abfd); | |
4272 | phdr = tdata->phdr; | |
4273 | count = tdata->program_header_size / bed->s->sizeof_phdr; | |
4274 | htab = spu_hash_table (info); | |
4275 | if (htab->num_overlays != 0) | |
4276 | { | |
4277 | struct elf_segment_map *m; | |
4278 | unsigned int o; | |
4279 | ||
4280 | for (i = 0, m = elf_tdata (abfd)->segment_map; m; ++i, m = m->next) | |
4281 | if (m->count != 0 | |
47f6dab9 | 4282 | && (o = spu_elf_section_data (m->sections[0])->u.o.ovl_index) != 0) |
e9f53129 AM |
4283 | { |
4284 | /* Mark this as an overlay header. */ | |
4285 | phdr[i].p_flags |= PF_OVERLAY; | |
4286 | ||
4287 | if (htab->ovtab != NULL && htab->ovtab->size != 0) | |
4288 | { | |
4289 | bfd_byte *p = htab->ovtab->contents; | |
47f6dab9 | 4290 | unsigned int off = o * 16 + 8; |
e9f53129 AM |
4291 | |
4292 | /* Write file_off into _ovly_table. */ | |
4293 | bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off); | |
4294 | } | |
4295 | } | |
4296 | } | |
4297 | ||
4298 | /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples | |
4299 | of 16. This should always be possible when using the standard | |
4300 | linker scripts, but don't create overlapping segments if | |
4301 | someone is playing games with linker scripts. */ | |
4302 | last = NULL; | |
4303 | for (i = count; i-- != 0; ) | |
4304 | if (phdr[i].p_type == PT_LOAD) | |
4305 | { | |
4306 | unsigned adjust; | |
4307 | ||
4308 | adjust = -phdr[i].p_filesz & 15; | |
4309 | if (adjust != 0 | |
4310 | && last != NULL | |
4311 | && phdr[i].p_offset + phdr[i].p_filesz > last->p_offset - adjust) | |
4312 | break; | |
4313 | ||
4314 | adjust = -phdr[i].p_memsz & 15; | |
4315 | if (adjust != 0 | |
4316 | && last != NULL | |
4317 | && phdr[i].p_filesz != 0 | |
4318 | && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust | |
4319 | && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr) | |
4320 | break; | |
4321 | ||
4322 | if (phdr[i].p_filesz != 0) | |
4323 | last = &phdr[i]; | |
4324 | } | |
4325 | ||
4326 | if (i == (unsigned int) -1) | |
4327 | for (i = count; i-- != 0; ) | |
4328 | if (phdr[i].p_type == PT_LOAD) | |
4329 | { | |
4330 | unsigned adjust; | |
4331 | ||
4332 | adjust = -phdr[i].p_filesz & 15; | |
4333 | phdr[i].p_filesz += adjust; | |
4334 | ||
4335 | adjust = -phdr[i].p_memsz & 15; | |
4336 | phdr[i].p_memsz += adjust; | |
4337 | } | |
4338 | ||
4339 | return TRUE; | |
4340 | } | |
4341 | ||
e9f53129 AM |
4342 | #define TARGET_BIG_SYM bfd_elf32_spu_vec |
4343 | #define TARGET_BIG_NAME "elf32-spu" | |
4344 | #define ELF_ARCH bfd_arch_spu | |
4345 | #define ELF_MACHINE_CODE EM_SPU | |
4346 | /* This matches the alignment need for DMA. */ | |
4347 | #define ELF_MAXPAGESIZE 0x80 | |
4348 | #define elf_backend_rela_normal 1 | |
4349 | #define elf_backend_can_gc_sections 1 | |
4350 | ||
4351 | #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup | |
157090f7 | 4352 | #define bfd_elf32_bfd_reloc_name_lookup spu_elf_reloc_name_lookup |
e9f53129 | 4353 | #define elf_info_to_howto spu_elf_info_to_howto |
ece5ef60 | 4354 | #define elf_backend_count_relocs spu_elf_count_relocs |
e9f53129 AM |
4355 | #define elf_backend_relocate_section spu_elf_relocate_section |
4356 | #define elf_backend_symbol_processing spu_elf_backend_symbol_processing | |
c1b2796f | 4357 | #define elf_backend_link_output_symbol_hook spu_elf_output_symbol_hook |
e9f53129 AM |
4358 | #define bfd_elf32_new_section_hook spu_elf_new_section_hook |
4359 | #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create | |
e9f53129 AM |
4360 | |
4361 | #define elf_backend_additional_program_headers spu_elf_additional_program_headers | |
4362 | #define elf_backend_modify_segment_map spu_elf_modify_segment_map | |
4363 | #define elf_backend_modify_program_headers spu_elf_modify_program_headers | |
4364 | #define elf_backend_post_process_headers spu_elf_post_process_headers | |
7d3287cb | 4365 | #define elf_backend_fake_sections spu_elf_fake_sections |
e9f53129 | 4366 | #define elf_backend_special_sections spu_elf_special_sections |
49fa1e15 | 4367 | #define bfd_elf32_bfd_final_link spu_elf_final_link |
e9f53129 AM |
4368 | |
4369 | #include "elf32-target.h" |