1 # This shell script emits a C file. -*- C -*-
2 # Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 # This file is part of the GNU Binutils.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 # This file is sourced from elf32.em, and defines extra spu specific
27 #include "elf32-spu.h"
29 /* Non-zero if no overlay processing should be done. */
30 static int no_overlays = 0;
32 /* Non-zero if we want stubs on all calls out of overlay regions. */
33 static int non_overlay_stubs = 0;
35 /* Whether to emit symbols for stubs. */
36 static int emit_stub_syms = 0;
38 /* Non-zero to perform stack space analysis. */
39 static int stack_analysis = 0;
41 /* Whether to emit symbols with stack requirements for each function. */
42 static int emit_stack_syms = 0;
44 /* Range of valid addresses for loadable sections. */
45 static bfd_vma local_store_lo = 0;
46 static bfd_vma local_store_hi = 0x3ffff;
48 /* Control --auto-overlay feature. */
49 static int auto_overlay = 0;
50 static char *auto_overlay_file = 0;
51 static unsigned int auto_overlay_fixed = 0;
52 static unsigned int auto_overlay_reserved = 0;
56 static const char ovl_mgr[] = {
59 ../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c
64 static const struct _ovl_stream ovl_mgr_stream = {
66 ovl_mgr + sizeof (ovl_mgr)
73 extern const bfd_target bfd_elf32_spu_vec;
75 return link_info.output_bfd->xvec == &bfd_elf32_spu_vec;
78 /* Create our note section. */
84 && !link_info.relocatable
85 && link_info.input_bfds != NULL
86 && !spu_elf_create_sections (&link_info,
87 stack_analysis, emit_stack_syms))
88 einfo ("%X%P: can not create note section: %E\n");
90 gld${EMULATION_NAME}_after_open ();
93 /* If O is NULL, add section S at the end of output section OUTPUT_NAME.
94 If O is not NULL, add section S at the beginning of output section O.
96 Really, we should be duplicating ldlang.c map_input_to_output_sections
97 logic here, ie. using the linker script to find where the section
98 goes. That's rather a lot of code, and we don't want to run
99 map_input_to_output_sections again because most sections are already
100 mapped. So cheat, and put the section in a fixed place, ignoring any
101 attempt via a linker script to put .stub, .ovtab, and built-in
102 overlay manager code somewhere else. */
105 spu_place_special_section (asection *s, asection *o, const char *output_name)
107 lang_output_section_statement_type *os;
109 os = lang_output_section_find (o != NULL ? o->name : output_name);
112 const char *save = s->name;
113 s->name = output_name;
114 gld${EMULATION_NAME}_place_orphan (s);
117 else if (o != NULL && os->children.head != NULL)
119 lang_statement_list_type add;
121 lang_list_init (&add);
122 lang_add_section (&add, s, os);
123 *add.tail = os->children.head;
124 os->children.head = add.head;
127 lang_add_section (&os->children, s, os);
129 s->output_section->size += s->size;
132 /* Load built-in overlay manager, and tweak overlay section alignment. */
135 spu_elf_load_ovl_mgr (void)
137 lang_output_section_statement_type *os;
138 struct elf_link_hash_entry *h;
140 h = elf_link_hash_lookup (elf_hash_table (&link_info),
141 "__ovly_load", FALSE, FALSE, FALSE);
144 && (h->root.type == bfd_link_hash_defined
145 || h->root.type == bfd_link_hash_defweak)
148 /* User supplied __ovly_load. */
150 else if (ovl_mgr_stream.start == ovl_mgr_stream.end)
151 einfo ("%F%P: no built-in overlay manager\n");
154 lang_input_statement_type *ovl_is;
156 ovl_is = lang_add_input_file ("builtin ovl_mgr",
157 lang_input_file_is_file_enum,
160 if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))
161 einfo ("%X%P: can not open built-in overlay manager: %E\n");
166 if (!load_symbols (ovl_is, NULL))
167 einfo ("%X%P: can not load built-in overlay manager: %E\n");
169 /* Map overlay manager sections to output sections. */
170 for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)
171 if ((in->flags & (SEC_ALLOC | SEC_LOAD))
172 == (SEC_ALLOC | SEC_LOAD))
173 spu_place_special_section (in, NULL, ".text");
177 /* Ensure alignment of overlay sections is sufficient. */
178 for (os = &lang_output_section_statement.head->output_section_statement;
181 if (os->bfd_section != NULL
182 && spu_elf_section_data (os->bfd_section) != NULL
183 && spu_elf_section_data (os->bfd_section)->u.o.ovl_index != 0)
185 if (os->bfd_section->alignment_power < 4)
186 os->bfd_section->alignment_power = 4;
188 /* Also ensure size rounds up. */
189 os->block_value = 16;
193 /* Go find if we need to do anything special for overlays. */
196 spu_before_allocation (void)
199 && !link_info.relocatable
202 /* Size the sections. This is premature, but we need to know the
203 rough layout so that overlays can be found. */
204 expld.phase = lang_mark_phase_enum;
205 expld.dataseg.phase = exp_dataseg_none;
206 one_lang_size_sections_pass (NULL, TRUE);
208 /* Find overlays by inspecting section vmas. */
209 if (spu_elf_find_overlays (&link_info))
213 if (auto_overlay != 0)
215 einfo ("%P: --auto-overlay ignored with user overlay script\n");
219 ret = spu_elf_size_stubs (&link_info,
220 spu_place_special_section,
223 einfo ("%X%P: can not size overlay stubs: %E\n");
225 spu_elf_load_ovl_mgr ();
228 /* We must not cache anything from the preliminary sizing. */
229 lang_reset_memory_regions ();
232 gld${EMULATION_NAME}_before_allocation ();
240 static struct tflist *tmp_file_list;
242 static void clean_tmp (void)
244 for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next)
245 unlink (tmp_file_list->name);
249 new_tmp_file (char **fname)
254 if (tmp_file_list == NULL)
256 tf = xmalloc (sizeof (*tf));
257 tf->next = tmp_file_list;
259 memcpy (tf->name, "ldXXXXXX", sizeof (tf->name));
262 fd = mkstemp (*fname);
264 *fname = mktemp (*fname);
267 fd = open (fname, O_RDWR | O_CREAT | O_EXCL, 0600);
273 spu_elf_open_overlay_script (void)
277 if (auto_overlay_file == NULL)
279 int fd = new_tmp_file (&auto_overlay_file);
282 script = fdopen (fd, "w");
285 script = fopen (auto_overlay_file, "w");
290 einfo ("%F%P: can not open script: %E\n");
296 spu_elf_relink (void)
298 char **argv = xmalloc ((my_argc + 5) * sizeof (*argv));
300 memcpy (argv, my_argv, my_argc * sizeof (*argv));
301 argv[my_argc++] = "--no-auto-overlay";
302 if (tmp_file_list->name == auto_overlay_file)
303 argv[my_argc++] = auto_overlay_file;
304 argv[my_argc++] = "-T";
305 argv[my_argc++] = auto_overlay_file;
307 execvp (argv[0], (char *const *) argv);
312 /* Final emulation specific call. */
315 gld${EMULATION_NAME}_finish (void)
319 need_laying_out = bfd_elf_discard_info (link_info.output_bfd, &link_info);
321 gld${EMULATION_NAME}_map_segments (need_laying_out);
323 if (is_spu_target ())
325 if (local_store_lo < local_store_hi)
329 s = spu_elf_check_vma (&link_info, auto_overlay,
330 local_store_lo, local_store_hi,
331 auto_overlay_fixed, auto_overlay_reserved,
332 spu_elf_load_ovl_mgr,
333 spu_elf_open_overlay_script,
335 if (s != NULL && !auto_overlay)
336 einfo ("%X%P: %A exceeds local store range\n", s);
338 else if (auto_overlay)
339 einfo ("%P: --auto-overlay ignored with zero local store range\n");
341 if (!spu_elf_build_stubs (&link_info,
342 emit_stub_syms || link_info.emitrelocations))
343 einfo ("%X%P: can not build overlay stubs: %E\n");
350 gld${EMULATION_NAME}_choose_target (int argc, char *argv[])
354 return ldemul_default_target (argc, argv);
359 if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then
361 #include "filenames.h"
363 #include <sys/wait.h>
366 base_name (const char *path)
368 const char *file = strrchr (path, '/');
369 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
371 char *bslash = strrchr (path, '\\\\');
373 if (file == NULL || (bslash != NULL && bslash > file))
388 /* This function is called when building a ppc32 or ppc64 executable
389 to handle embedded spu images. */
390 extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
393 embedded_spu_file (lang_input_statement_type *entry, const char *flags)
402 union lang_statement_union **old_stat_tail;
403 union lang_statement_union **old_file_tail;
404 union lang_statement_union *new_ent;
405 lang_input_statement_type *search;
407 if (entry->the_bfd->format != bfd_object
408 || strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0
409 || (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC
410 && entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN))
413 /* Use the filename as the symbol marking the program handle struct. */
414 sym = base_name (entry->the_bfd->filename);
416 handle = xstrdup (sym);
417 for (p = handle; *p; ++p)
418 if (!(ISALNUM (*p) || *p == '$' || *p == '.'))
421 fd = new_tmp_file (&oname);
426 for (search = (lang_input_statement_type *) input_file_chain.head;
428 search = (lang_input_statement_type *) search->next_real_file)
429 if (search->filename != NULL)
431 const char *infile = base_name (search->filename);
433 if (strncmp (infile, "crtbegin", 8) == 0)
435 if (infile[8] == 'S')
436 flags = concat (flags, " -fPIC", (const char *) NULL);
437 else if (infile[8] == 'T')
438 flags = concat (flags, " -fpie", (const char *) NULL);
443 /* Use fork() and exec() rather than system() so that we don't
444 need to worry about quoting args. */
448 cmd[3] = entry->the_bfd->filename;
451 if (trace_file_tries)
453 info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"),
454 cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);
463 execvp (cmd[0], (char *const *) cmd);
464 if (strcmp ("embedspu", EMBEDSPU) != 0)
467 execvp (cmd[0], (char *const *) cmd);
473 #define WAITFOR(PID, STAT) waitpid (PID, STAT, 0)
475 #define WAITFOR(PID, STAT) wait (STAT)
477 if (WAITFOR (pid, &status) != pid
478 || !WIFEXITED (status)
479 || WEXITSTATUS (status) != 0)
483 old_stat_tail = stat_ptr->tail;
484 old_file_tail = input_file_chain.tail;
485 if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL)
488 /* lang_add_input_file put the new list entry at the end of the statement
489 and input file lists. Move it to just after the current entry. */
490 new_ent = *old_stat_tail;
491 *old_stat_tail = NULL;
492 stat_ptr->tail = old_stat_tail;
493 *old_file_tail = NULL;
494 input_file_chain.tail = old_file_tail;
495 new_ent->header.next = entry->header.next;
496 entry->header.next = new_ent;
497 new_ent->input_statement.next_real_file = entry->next_real_file;
498 entry->next_real_file = new_ent;
500 /* Ensure bfd sections are excluded from the output. */
501 bfd_section_list_clear (entry->the_bfd);
502 entry->loaded = TRUE;
509 # Define some shell vars to insert bits of code into the standard elf
510 # parse_args and list_options functions.
512 PARSE_AND_LIST_PROLOGUE='
513 #define OPTION_SPU_PLUGIN 301
514 #define OPTION_SPU_NO_OVERLAYS (OPTION_SPU_PLUGIN + 1)
515 #define OPTION_SPU_STUB_SYMS (OPTION_SPU_NO_OVERLAYS + 1)
516 #define OPTION_SPU_NON_OVERLAY_STUBS (OPTION_SPU_STUB_SYMS + 1)
517 #define OPTION_SPU_LOCAL_STORE (OPTION_SPU_NON_OVERLAY_STUBS + 1)
518 #define OPTION_SPU_STACK_ANALYSIS (OPTION_SPU_LOCAL_STORE + 1)
519 #define OPTION_SPU_STACK_SYMS (OPTION_SPU_STACK_ANALYSIS + 1)
520 #define OPTION_SPU_AUTO_OVERLAY (OPTION_SPU_STACK_SYMS + 1)
521 #define OPTION_SPU_AUTO_RELINK (OPTION_SPU_AUTO_OVERLAY + 1)
522 #define OPTION_SPU_OVERLAY_RODATA (OPTION_SPU_AUTO_RELINK + 1)
523 #define OPTION_SPU_FIXED_SPACE (OPTION_SPU_OVERLAY_RODATA + 1)
524 #define OPTION_SPU_RESERVED_SPACE (OPTION_SPU_FIXED_SPACE + 1)
525 #define OPTION_SPU_NO_AUTO_OVERLAY (OPTION_SPU_RESERVED_SPACE + 1)
528 PARSE_AND_LIST_LONGOPTS='
529 { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },
530 { "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },
531 { "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },
532 { "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },
533 { "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE },
534 { "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS },
535 { "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS },
536 { "auto-overlay", optional_argument, NULL, OPTION_SPU_AUTO_OVERLAY },
537 { "auto-relink", no_argument, NULL, OPTION_SPU_AUTO_RELINK },
538 { "overlay-rodata", no_argument, NULL, OPTION_SPU_OVERLAY_RODATA },
539 { "fixed-space", required_argument, NULL, OPTION_SPU_FIXED_SPACE },
540 { "reserved-space", required_argument, NULL, OPTION_SPU_RESERVED_SPACE },
541 { "no-auto-overlay", optional_argument, NULL, OPTION_SPU_NO_AUTO_OVERLAY },
544 PARSE_AND_LIST_OPTIONS='
546 --plugin Make SPU plugin.\n\
547 --no-overlays No overlay handling.\n\
548 --emit-stub-syms Add symbols on overlay call stubs.\n\
549 --extra-overlay-stubs Add stubs on all calls out of overlay regions.\n\
550 --local-store=lo:hi Valid address range.\n\
551 --stack-analysis Estimate maximum stack requirement.\n\
552 --emit-stack-syms Add sym giving stack needed for each func.\n\
553 --auto-overlay [=filename] Create an overlay script in filename if\n\
554 executable does not fit in local store.\n\
555 --auto-relink Rerun linker using auto-overlay script.\n\
556 --overlay-rodata Place read-only data with associated function\n\
558 --fixed-space=bytes Local store for non-overlay code and data.\n\
559 --reserved-space=bytes Local store for stack and heap.\n"
563 PARSE_AND_LIST_ARGS_CASES='
564 case OPTION_SPU_PLUGIN:
568 case OPTION_SPU_NO_OVERLAYS:
572 case OPTION_SPU_STUB_SYMS:
576 case OPTION_SPU_NON_OVERLAY_STUBS:
577 non_overlay_stubs = 1;
580 case OPTION_SPU_LOCAL_STORE:
583 local_store_lo = strtoul (optarg, &end, 0);
584 if (*end == '\'':'\'')
586 local_store_hi = strtoul (end + 1, &end, 0);
590 einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg);
594 case OPTION_SPU_STACK_ANALYSIS:
598 case OPTION_SPU_STACK_SYMS:
602 case OPTION_SPU_AUTO_OVERLAY:
606 auto_overlay_file = optarg;
611 case OPTION_SPU_AUTO_RELINK:
615 case OPTION_SPU_OVERLAY_RODATA:
619 case OPTION_SPU_FIXED_SPACE:
622 auto_overlay_fixed = strtoul (optarg, &end, 0);
624 einfo (_("%P%F: invalid --fixed-space value `%s'\''\n"), optarg);
628 case OPTION_SPU_RESERVED_SPACE:
631 auto_overlay_reserved = strtoul (optarg, &end, 0);
633 einfo (_("%P%F: invalid --reserved-space value `%s'\''\n"), optarg);
637 case OPTION_SPU_NO_AUTO_OVERLAY:
644 if (tmp_file_list == NULL)
647 len = strlen (optarg) + 1;
648 tf = xmalloc (sizeof (*tf) - sizeof (tf->name) + len);
649 memcpy (tf->name, optarg, len);
650 tf->next = tmp_file_list;
657 LDEMUL_AFTER_OPEN=spu_after_open
658 LDEMUL_BEFORE_ALLOCATION=spu_before_allocation
659 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
660 LDEMUL_CHOOSE_TARGET=gld${EMULATION_NAME}_choose_target