# This shell script emits a C file. -*- C -*-
-# Copyright 2002, 2003, 2004, 2005, 2007, 2008
+# Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
# Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
/* Whether to run tls optimization. */
static int no_tls_opt = 0;
+static int no_tls_get_addr_opt = 0;
/* Whether to run opd optimization. */
static int no_opd_opt = 0;
/* Whether to allow multiple toc sections. */
static int no_multi_toc = 0;
+/* Whether to sort input toc and got sections. */
+static int no_toc_sort = 0;
+
+/* Set if PLT call stubs should load r11. */
+static int plt_static_chain = ${DEFAULT_PLT_STATIC_CHAIN-0};
+
+/* Set if PLT call stubs need to be thread safe on power7+. */
+static int plt_thread_safe = -1;
+
+/* Set if individual PLT call stubs should be aligned. */
+static int plt_stub_align = 0;
+
/* Whether to emit symbols for stubs. */
-static int emit_stub_syms = 0;
+static int emit_stub_syms = -1;
static asection *toc_section = 0;
static void
ppc_create_output_section_statements (void)
{
- extern const bfd_target bfd_elf64_powerpc_vec;
- extern const bfd_target bfd_elf64_powerpcle_vec;
-
- if (link_info.output_bfd->xvec != &bfd_elf64_powerpc_vec
- && link_info.output_bfd->xvec != &bfd_elf64_powerpcle_vec)
+ if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
+ && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA))
return;
link_info.wrap_char = '.';
bfd_get_arch (link_info.output_bfd),
bfd_get_mach (link_info.output_bfd)))
{
- einfo ("%F%P: can not create BFD %E\n");
+ einfo ("%F%P: can not create BFD: %E\n");
return;
}
ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
}
+/* Move the input section statement at *U which happens to be on LIST
+ to be just before *TO. */
+
+static void
+move_input_section (lang_statement_list_type *list,
+ lang_statement_union_type **u,
+ lang_statement_union_type **to)
+{
+ lang_statement_union_type *s = *u;
+ asection *i = s->input_section.section;
+ asection *p, *n;
+
+ /* Snip the input section from the statement list. If it was the
+ last statement, fix the list tail pointer. */
+ *u = s->header.next;
+ if (*u == NULL)
+ list->tail = u;
+ /* Add it back in the new position. */
+ s->header.next = *to;
+ *to = s;
+ if (list->tail == to)
+ list->tail = &s->header.next;
+
+ /* Trim I off the bfd map_head/map_tail doubly linked lists. */
+ n = i->map_head.s;
+ p = i->map_tail.s;
+ (p != NULL ? p : i->output_section)->map_head.s = n;
+ (n != NULL ? n : i->output_section)->map_tail.s = p;
+
+ /* Add I back on in its new position. */
+ if (s->header.next->header.type == lang_input_section_enum)
+ {
+ n = s->header.next->input_section.section;
+ p = n->map_tail.s;
+ }
+ else
+ {
+ /* If the next statement is not an input section statement then
+ TO must point at the previous input section statement
+ header.next field. */
+ lang_input_section_type *prev = (lang_input_section_type *)
+ ((char *) to - offsetof (lang_statement_union_type, header.next));
+
+ ASSERT (prev->header.type == lang_input_section_enum);
+ p = prev->section;
+ n = p->map_head.s;
+ }
+ i->map_head.s = n;
+ i->map_tail.s = p;
+ (p != NULL ? p : i->output_section)->map_head.s = i;
+ (n != NULL ? n : i->output_section)->map_tail.s = i;
+}
+
+/* Sort input section statements in the linker script tree rooted at
+ LIST so that those whose owning bfd happens to have a section
+ called .init or .fini are placed first. Place any TOC sections
+ referenced by small TOC relocs next, with TOC sections referenced
+ only by bigtoc relocs last. */
+
+static void
+sort_toc_sections (lang_statement_list_type *list,
+ lang_statement_union_type **ini,
+ lang_statement_union_type **small)
+{
+ lang_statement_union_type *s, **u;
+ asection *i;
+
+ u = &list->head;
+ while ((s = *u) != NULL)
+ {
+ switch (s->header.type)
+ {
+ case lang_wild_statement_enum:
+ sort_toc_sections (&s->wild_statement.children, ini, small);
+ break;
+
+ case lang_group_statement_enum:
+ sort_toc_sections (&s->group_statement.children, ini, small);
+ break;
+
+ case lang_input_section_enum:
+ i = s->input_section.section;
+ /* Leave the stub_file .got where it is. We put the .got
+ header there. */
+ if (i->owner == stub_file->the_bfd)
+ break;
+ if (bfd_get_section_by_name (i->owner, ".init") != NULL
+ || bfd_get_section_by_name (i->owner, ".fini") != NULL)
+ {
+ if (ini != NULL && *ini != s)
+ {
+ move_input_section (list, u, ini);
+ if (small == ini)
+ small = &s->header.next;
+ ini = &s->header.next;
+ continue;
+ }
+ if (small == ini)
+ small = &s->header.next;
+ ini = &s->header.next;
+ break;
+ }
+ else if (ini == NULL)
+ ini = u;
+
+ if (ppc64_elf_has_small_toc_reloc (i))
+ {
+ if (small != NULL && *small != s)
+ {
+ move_input_section (list, u, small);
+ small = &s->header.next;
+ continue;
+ }
+ small = &s->header.next;
+ }
+ else if (small == NULL)
+ small = u;
+ break;
+
+ default:
+ break;
+ }
+ u = &s->header.next;
+ }
+}
+
+static void
+prelim_size_sections (void)
+{
+ if (expld.phase != lang_mark_phase_enum)
+ {
+ expld.phase = lang_mark_phase_enum;
+ expld.dataseg.phase = exp_dataseg_none;
+ one_lang_size_sections_pass (NULL, FALSE);
+ /* We must not cache anything from the preliminary sizing. */
+ lang_reset_memory_regions ();
+ }
+}
+
static void
ppc_before_allocation (void)
{
if (stub_file != NULL)
{
if (!no_opd_opt
- && !ppc64_elf_edit_opd (link_info.output_bfd, &link_info,
- non_overlapping_opd))
- einfo ("%X%P: can not edit %s %E\n", "opd");
+ && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd))
+ einfo ("%X%P: can not edit %s: %E\n", "opd");
- if (ppc64_elf_tls_setup (link_info.output_bfd, &link_info)
+ if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc)
&& !no_tls_opt)
{
/* Size the sections. This is premature, but we want to know the
TLS segment layout so that certain optimizations can be done. */
- expld.phase = lang_mark_phase_enum;
- expld.dataseg.phase = exp_dataseg_none;
- one_lang_size_sections_pass (NULL, TRUE);
+ prelim_size_sections ();
- if (!ppc64_elf_tls_optimize (link_info.output_bfd, &link_info))
+ if (!ppc64_elf_tls_optimize (&link_info))
einfo ("%X%P: TLS problem %E\n");
-
- /* We must not cache anything from the preliminary sizing. */
- lang_reset_memory_regions ();
}
if (!no_toc_opt
- && !link_info.relocatable
- && !ppc64_elf_edit_toc (link_info.output_bfd, &link_info))
- einfo ("%X%P: can not edit %s %E\n", "toc");
+ && !link_info.relocatable)
+ {
+ prelim_size_sections ();
+
+ if (!ppc64_elf_edit_toc (&link_info))
+ einfo ("%X%P: can not edit %s: %E\n", "toc");
+ }
+
+ if (!no_toc_sort)
+ {
+ lang_output_section_statement_type *toc_os;
+
+ toc_os = lang_output_section_find (".got");
+ if (toc_os != NULL)
+ sort_toc_sections (&toc_os->children, NULL, NULL);
+ }
}
gld${EMULATION_NAME}_before_allocation ();
lang_output_section_statement_type *os;
struct hook_stub_info info;
- stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
- if (stub_sec == NULL)
- goto err_ret;
-
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
- if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
+ stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
+ stub_sec_name, flags);
+ if (stub_sec == NULL
+ || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec,
+ plt_stub_align > 5 ? plt_stub_align : 5))
goto err_ret;
output_section = input_section->output_section;
info.input_section = input_section;
lang_list_init (&info.add);
- lang_add_section (&info.add, stub_sec, os);
+ lang_add_section (&info.add, stub_sec, NULL, os);
if (info.add.head == NULL)
goto err_ret;
to recalculate all the section offsets. This may mean we need to
add even more stubs. */
gld${EMULATION_NAME}_map_segments (TRUE);
- need_laying_out = -1;
-}
-
-/* Call the back-end function to set TOC base after we have placed all
- the sections. */
-static void
-gld${EMULATION_NAME}_after_allocation (void)
-{
if (!link_info.relocatable)
_bfd_set_gp_value (link_info.output_bfd,
ppc64_elf_toc (link_info.output_bfd));
+
+ need_laying_out = -1;
}
{
asection *i = statement->input_section.section;
- if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+ if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
&& (i->flags & SEC_EXCLUDE) == 0
&& i->output_section == toc_section)
- ppc64_elf_next_toc_section (&link_info, i);
+ {
+ if (!ppc64_elf_next_toc_section (&link_info, i))
+ einfo ("%X%P: linker script separates .got and .toc\n");
+ }
}
}
{
asection *i = statement->input_section.section;
- if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+ if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
&& (i->flags & SEC_EXCLUDE) == 0
&& i->output_section != NULL
&& i->output_section->owner == link_info.output_bfd)
}
-/* Final emulation specific call. */
-
+/* Call the back-end function to set TOC base after we have placed all
+ the sections. */
static void
-gld${EMULATION_NAME}_finish (void)
+gld${EMULATION_NAME}_after_allocation (void)
{
- /* e_entry on PowerPC64 points to the function descriptor for
- _start. If _start is missing, default to the first function
- descriptor in the .opd section. */
- entry_section = ".opd";
-
- /* bfd_elf_discard_info just plays with debugging sections,
- ie. doesn't affect any code, so we can delay resizing the
+ /* bfd_elf_discard_info just plays with data and debugging sections,
+ ie. doesn't affect code size, so we can delay resizing the
sections. It's likely we'll resize everything in the process of
adding stubs. */
if (bfd_elf_discard_info (link_info.output_bfd, &link_info))
stubs. */
if (stub_file != NULL && !link_info.relocatable)
{
- int ret = ppc64_elf_setup_section_lists (link_info.output_bfd,
- &link_info,
- no_multi_toc);
+ int ret = ppc64_elf_setup_section_lists (&link_info,
+ &ppc_add_stub_section,
+ &ppc_layout_sections_again);
if (ret < 0)
einfo ("%X%P: can not size stub section: %E\n");
else if (ret > 0)
{
- toc_section = bfd_get_section_by_name (link_info.output_bfd, ".got");
- if (toc_section != NULL)
+ ppc64_elf_start_multitoc_partition (&link_info);
+
+ if (!no_multi_toc)
+ {
+ toc_section = bfd_get_section_by_name (link_info.output_bfd,
+ ".got");
+ if (toc_section != NULL)
+ lang_for_each_statement (build_toc_list);
+ }
+
+ if (ppc64_elf_layout_multitoc (&link_info)
+ && !no_multi_toc
+ && toc_section != NULL)
lang_for_each_statement (build_toc_list);
- ppc64_elf_reinit_toc (link_info.output_bfd, &link_info);
+ ppc64_elf_finish_multitoc_partition (&link_info);
lang_for_each_statement (build_section_lists);
+ if (!ppc64_elf_check_init_fini (&link_info))
+ einfo ("%P: .init/.fini fragments use differing TOC pointers\n");
+
/* Call into the BFD backend to do the real work. */
- if (!ppc64_elf_size_stubs (link_info.output_bfd,
- &link_info,
- group_size,
- &ppc_add_stub_section,
- &ppc_layout_sections_again))
+ if (!ppc64_elf_size_stubs (&link_info, group_size,
+ plt_static_chain, plt_thread_safe,
+ plt_stub_align))
einfo ("%X%P: can not size stub section: %E\n");
}
}
if (need_laying_out != -1)
- gld${EMULATION_NAME}_map_segments (need_laying_out);
-
- if (link_info.relocatable)
{
- asection *toc = bfd_get_section_by_name (link_info.output_bfd, ".toc");
- if (toc != NULL
- && bfd_section_size (link_info.output_bfd, toc) > 0x10000)
- einfo ("%X%P: TOC section size exceeds 64k\n");
+ gld${EMULATION_NAME}_map_segments (need_laying_out);
+
+ if (!link_info.relocatable)
+ _bfd_set_gp_value (link_info.output_bfd,
+ ppc64_elf_toc (link_info.output_bfd));
}
+}
+
+
+/* Final emulation specific call. */
+
+static void
+gld${EMULATION_NAME}_finish (void)
+{
+ /* e_entry on PowerPC64 points to the function descriptor for
+ _start. If _start is missing, default to the first function
+ descriptor in the .opd section. */
+ entry_section = ".opd";
if (stub_added)
{
char *msg = NULL;
char *line, *endline;
- emit_stub_syms |= link_info.emitrelocations;
+ if (emit_stub_syms < 0)
+ emit_stub_syms = 1;
if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
config.stats ? &msg : NULL))
einfo ("%X%P: can not build stubs: %E\n");
+ fflush (stdout);
for (line = msg; line != NULL; line = endline)
{
endline = strchr (line, '\n');
*endline++ = '\0';
fprintf (stderr, "%s: %s\n", program_name, line);
}
+ fflush (stderr);
if (msg != NULL)
free (msg);
}
char *dot_pat;
if (!dotsyms
- || (entry->pattern != NULL
- && (entry->pattern[0] == '*' || entry->pattern[0] == '.')))
+ || entry->pattern[0] == '.'
+ || (!entry->literal && entry->pattern[0] == '*'))
return entry;
dot_entry = xmalloc (sizeof *dot_entry);
*dot_entry = *entry;
dot_entry->next = entry;
- if (entry->pattern != NULL)
- {
- len = strlen (entry->pattern) + 2;
- dot_pat = xmalloc (len);
- dot_pat[0] = '.';
- memcpy (dot_pat + 1, entry->pattern, len - 1);
- dot_entry->pattern = dot_pat;
- }
- if (entry->symbol != NULL)
- {
- len = strlen (entry->symbol) + 2;
- dot_pat = xmalloc (len);
- dot_pat[0] = '.';
- memcpy (dot_pat + 1, entry->symbol, len - 1);
- dot_entry->symbol = dot_pat;
- }
+ len = strlen (entry->pattern) + 2;
+ dot_pat = xmalloc (len);
+ dot_pat[0] = '.';
+ memcpy (dot_pat + 1, entry->pattern, len - 1);
+ dot_entry->pattern = dot_pat;
+ dot_entry->script = 1;
return dot_entry;
}
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
-PARSE_AND_LIST_PROLOGUE='
-#define OPTION_STUBGROUP_SIZE 301
-#define OPTION_STUBSYMS (OPTION_STUBGROUP_SIZE + 1)
-#define OPTION_DOTSYMS (OPTION_STUBSYMS + 1)
+PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
+#define OPTION_STUBGROUP_SIZE 321
+#define OPTION_PLT_STATIC_CHAIN (OPTION_STUBGROUP_SIZE + 1)
+#define OPTION_NO_PLT_STATIC_CHAIN (OPTION_PLT_STATIC_CHAIN + 1)
+#define OPTION_PLT_THREAD_SAFE (OPTION_NO_PLT_STATIC_CHAIN + 1)
+#define OPTION_NO_PLT_THREAD_SAFE (OPTION_PLT_THREAD_SAFE + 1)
+#define OPTION_PLT_ALIGN (OPTION_NO_PLT_THREAD_SAFE + 1)
+#define OPTION_NO_PLT_ALIGN (OPTION_PLT_ALIGN + 1)
+#define OPTION_STUBSYMS (OPTION_NO_PLT_ALIGN + 1)
+#define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1)
+#define OPTION_DOTSYMS (OPTION_NO_STUBSYMS + 1)
#define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1)
#define OPTION_NO_TLS_OPT (OPTION_NO_DOTSYMS + 1)
-#define OPTION_NO_OPD_OPT (OPTION_NO_TLS_OPT + 1)
+#define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1)
+#define OPTION_NO_OPD_OPT (OPTION_NO_TLS_GET_ADDR_OPT + 1)
#define OPTION_NO_TOC_OPT (OPTION_NO_OPD_OPT + 1)
#define OPTION_NO_MULTI_TOC (OPTION_NO_TOC_OPT + 1)
-#define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_MULTI_TOC + 1)
+#define OPTION_NO_TOC_SORT (OPTION_NO_MULTI_TOC + 1)
+#define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_TOC_SORT + 1)
'
-PARSE_AND_LIST_LONGOPTS='
+PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
+ { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN },
+ { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN },
+ { "plt-thread-safe", no_argument, NULL, OPTION_PLT_THREAD_SAFE },
+ { "no-plt-thread-safe", no_argument, NULL, OPTION_NO_PLT_THREAD_SAFE },
+ { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN },
+ { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN },
{ "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
+ { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
{ "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
{ "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
{ "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
+ { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT },
{ "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT },
{ "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT },
{ "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC },
+ { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT },
{ "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
'
-PARSE_AND_LIST_OPTIONS='
+PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
fprintf (file, _("\
--stub-group-size=N Maximum size of a group of input sections that\n\
can be handled by one stub section. A negative\n\
choose suitable defaults.\n"
));
fprintf (file, _("\
+ --plt-static-chain PLT call stubs should load r11.${DEFAULT_PLT_STATIC_CHAIN- (default)}\n"
+ ));
+ fprintf (file, _("\
+ --no-plt-static-chain PLT call stubs should not load r11.${DEFAULT_PLT_STATIC_CHAIN+ (default)}\n"
+ ));
+ fprintf (file, _("\
+ --plt-thread-safe PLT call stubs with load-load barrier.\n"
+ ));
+ fprintf (file, _("\
+ --no-plt-thread-safe PLT call stubs without barrier.\n"
+ ));
+ fprintf (file, _("\
+ --plt-align [=<align>] Align PLT call stubs to fit cache lines.\n"
+ ));
+ fprintf (file, _("\
+ --no-plt-align Dont'\''t align individual PLT call stubs.\n"
+ ));
+ fprintf (file, _("\
--emit-stub-syms Label linker stubs with a symbol.\n"
));
fprintf (file, _("\
+ --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n"
+ ));
+ fprintf (file, _("\
--dotsyms For every version pattern \"foo\" in a version\n\
script, add \".foo\" so that function code\n\
symbols are treated the same as function\n\
--no-tls-optimize Don'\''t try to optimize TLS accesses.\n"
));
fprintf (file, _("\
+ --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n"
+ ));
+ fprintf (file, _("\
--no-opd-optimize Don'\''t optimize the OPD section.\n"
));
fprintf (file, _("\
--no-multi-toc Disallow automatic multiple toc sections.\n"
));
fprintf (file, _("\
+ --no-toc-sort Don'\''t sort TOC and GOT sections.\n"
+ ));
+ fprintf (file, _("\
--non-overlapping-opd Canonicalize .opd, so that there are no\n\
overlapping .opd entries.\n"
));
'
-PARSE_AND_LIST_ARGS_CASES='
+PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
case OPTION_STUBGROUP_SIZE:
{
const char *end;
}
break;
+ case OPTION_PLT_STATIC_CHAIN:
+ plt_static_chain = 1;
+ break;
+
+ case OPTION_NO_PLT_STATIC_CHAIN:
+ plt_static_chain = 0;
+ break;
+
+ case OPTION_PLT_THREAD_SAFE:
+ plt_thread_safe = 1;
+ break;
+
+ case OPTION_NO_PLT_THREAD_SAFE:
+ plt_thread_safe = 0;
+ break;
+
+ case OPTION_PLT_ALIGN:
+ if (optarg != NULL)
+ {
+ char *end;
+ unsigned long val = strtoul (optarg, &end, 0);
+ if (*end || val > 8)
+ einfo (_("%P%F: invalid --plt-align `%s'\''\n"), optarg);
+ plt_stub_align = val;
+ }
+ else
+ plt_stub_align = 5;
+ break;
+
+ case OPTION_NO_PLT_ALIGN:
+ plt_stub_align = 0;
+ break;
+
case OPTION_STUBSYMS:
emit_stub_syms = 1;
break;
+ case OPTION_NO_STUBSYMS:
+ emit_stub_syms = 0;
+ break;
+
case OPTION_DOTSYMS:
dotsyms = 1;
break;
no_tls_opt = 1;
break;
+ case OPTION_NO_TLS_GET_ADDR_OPT:
+ no_tls_get_addr_opt = 1;
+ break;
+
case OPTION_NO_OPD_OPT:
no_opd_opt = 1;
break;
no_multi_toc = 1;
break;
+ case OPTION_NO_TOC_SORT:
+ no_toc_sort = 1;
+ break;
+
case OPTION_NON_OVERLAPPING_OPD:
non_overlapping_opd = 1;
break;
projects / deliverable / binutils-gdb.git / blobdiff