# This shell script emits a C file. -*- C -*-
-# Copyright 2002, 2003 Free Software Foundation, Inc.
+# Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
#
# This file is part of GLD, the Gnu Linker.
#
#include "ldctor.h"
#include "libbfd.h"
+#include "elf-bfd.h"
#include "elf64-ppc.h"
/* Fake input file for stubs. */
static lang_input_statement_type *stub_file;
+static int stub_added = 0;
/* Whether we need to call ppc_layout_sections_again. */
static int need_laying_out = 0;
static int dotsyms = 1;
/* Whether to run tls optimization. */
-static int notlsopt = 0;
+static int no_tls_opt = 0;
+
+/* Whether to run opd optimization. */
+static int no_opd_opt = 0;
+
+/* Whether to run toc optimization. */
+static int no_toc_opt = 0;
+
+/* Whether to allow multiple toc sections. */
+static int no_multi_toc = 0;
/* Whether to emit symbols for stubs. */
static int emit_stub_syms = 0;
static asection *toc_section = 0;
+/* Whether to canonicalize .opd so that there are no overlapping
+ .opd entries. */
+static int non_overlapping_opd = 0;
/* This is called before the input files are opened. We create a new
fake input file to hold the stub sections. */
&& link_info.hash->creator != &bfd_elf64_powerpcle_vec)
return;
+ link_info.wrap_char = '.';
+
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
NULL);
return;
}
+ stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
ldlang_add_file (stub_file);
-}
-
-static void
-ppc_after_open (void)
-{
- if (!ppc64_elf_mark_entry_syms (&link_info))
- {
- einfo ("%X%P: can not mark entry symbols %E\n");
- return;
- }
-
- gld${EMULATION_NAME}_after_open ();
+ ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
}
static void
{
if (stub_file != NULL)
{
- if (!ppc64_elf_edit_opd (output_bfd, &link_info))
+ if (!no_opd_opt
+ && !ppc64_elf_edit_opd (output_bfd, &link_info, non_overlapping_opd))
{
- einfo ("%X%P: can not edit opd %E\n");
+ einfo ("%X%P: can not edit %s %E\n", "opd");
return;
}
- if (ppc64_elf_tls_setup (output_bfd, &link_info) && !notlsopt)
+ if (ppc64_elf_tls_setup (output_bfd, &link_info) && !no_tls_opt)
{
/* Size the sections. This is premature, but we want to know the
TLS segment layout so that certain optimizations can be done. */
return;
}
+ /* We must not cache anything from the preliminary sizing. */
+ elf_tdata (output_bfd)->program_header_size = 0;
lang_reset_memory_regions ();
}
+
+ if (!no_toc_opt
+ && !link_info.relocatable
+ && !ppc64_elf_edit_toc (output_bfd, &link_info))
+ {
+ einfo ("%X%P: can not edit %s %E\n", "toc");
+ return;
+ }
}
gld${EMULATION_NAME}_before_allocation ();
if (info.add.head == NULL)
goto err_ret;
+ stub_added = 1;
if (hook_in_stub (&info, &os->children.head))
return stub_sec;
static void
gld${EMULATION_NAME}_after_allocation (void)
{
- if (!link_info.relocateable)
+ if (!link_info.relocatable)
_bfd_set_gp_value (output_bfd, ppc64_elf_toc (output_bfd));
}
{
if (statement->header.type == lang_input_section_enum
&& !statement->input_section.ifile->just_syms_flag
+ && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
&& statement->input_section.section->output_section == toc_section)
ppc64_elf_next_toc_section (&link_info, statement->input_section.section);
}
{
if (statement->header.type == lang_input_section_enum
&& !statement->input_section.ifile->just_syms_flag
+ && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
&& statement->input_section.section->output_section != NULL
&& statement->input_section.section->output_section->owner == output_bfd)
{
descriptor in the .opd section. */
entry_section = ".opd";
- /* bfd_elf64_discard_info just plays with debugging sections,
+ /* bfd_elf_discard_info just plays with debugging sections,
ie. doesn't affect any code, so we can delay resizing the
sections. It's likely we'll resize everything in the process of
adding stubs. */
- if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
+ if (bfd_elf_discard_info (output_bfd, &link_info))
need_laying_out = 1;
/* If generating a relocatable output file, then we don't have any
stubs. */
- if (stub_file != NULL && !link_info.relocateable)
+ if (stub_file != NULL && !link_info.relocatable)
{
- int ret = ppc64_elf_setup_section_lists (output_bfd, &link_info);
+ int ret = ppc64_elf_setup_section_lists (output_bfd, &link_info,
+ no_multi_toc);
if (ret != 0)
{
if (ret < 0)
return;
}
- toc_section = bfd_get_section_by_name (output_bfd, ".toc");
+ toc_section = bfd_get_section_by_name (output_bfd, ".got");
if (toc_section != NULL)
lang_for_each_statement (build_toc_list);
/* Call into the BFD backend to do the real work. */
if (!ppc64_elf_size_stubs (output_bfd,
- stub_file->the_bfd,
&link_info,
group_size,
&ppc_add_stub_section,
if (need_laying_out)
ppc_layout_sections_again ();
- if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
+ if (link_info.relocatable)
+ {
+ asection *toc = bfd_get_section_by_name (output_bfd, ".toc");
+ if (toc != NULL
+ && bfd_section_size (output_bfd, toc) > 0x10000)
+ einfo ("%X%P: TOC section size exceeds 64k\n");
+ }
+
+ if (stub_added)
{
char *msg = NULL;
char *line, *endline;
+ emit_stub_syms |= link_info.emitrelocations;
if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
config.stats ? &msg : NULL))
einfo ("%X%P: can not build stubs: %E\n");
if (msg != NULL)
free (msg);
}
+
+ ppc64_elf_restore_symbols (&link_info);
}
gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry)
{
struct bfd_elf_version_expr *dot_entry;
- struct bfd_elf_version_expr *next;
unsigned int len;
char *dot_pat;
- if (!dotsyms || entry->pattern[0] == '*')
+ if (!dotsyms || entry->pattern[0] == '*' || entry->pattern[0] == '.')
return entry;
- /* Is the script adding ".foo" explicitly? */
- if (entry->pattern[0] == '.')
- {
- /* We may have added this pattern automatically. Don't add it
- again. Quadratic behaviour here is acceptable as the list
- may be traversed for each input bfd symbol. */
- for (next = entry->next; next != NULL; next = next->next)
- {
- if (strcmp (next->pattern, entry->pattern) == 0
- && next->match == entry->match)
- {
- next = entry->next;
- free ((char *) entry->pattern);
- free (entry);
- return next;
- }
- }
- return entry;
- }
-
- /* Don't add ".foo" if the script has already done so. */
- for (next = entry->next; next != NULL; next = next->next)
- {
- if (next->pattern[0] == '.'
- && strcmp (next->pattern + 1, entry->pattern) == 0
- && next->match == entry->match)
- return entry;
- }
-
dot_entry = xmalloc (sizeof *dot_entry);
+ *dot_entry = *entry;
dot_entry->next = entry;
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->match = entry->match;
+ 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;
+ }
return dot_entry;
}
#define OPTION_DOTSYMS (OPTION_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_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)
'
PARSE_AND_LIST_LONGOPTS='
{ "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-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 },
+ { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--no-tls-optimize Don'\''t try to optimize TLS accesses.\n"
));
+ fprintf (file, _("\
+ --no-opd-optimize Don'\''t optimize the OPD section.\n"
+ ));
+ fprintf (file, _("\
+ --no-toc-optimize Don'\''t optimize the TOC section.\n"
+ ));
+ fprintf (file, _("\
+ --no-multi-toc Disallow automatic multiple toc sections.\n"
+ ));
+ fprintf (file, _("\
+ --non-overlapping-opd Canonicalize .opd, so that there are no overlapping\n\
+ .opd entries.\n"
+ ));
'
PARSE_AND_LIST_ARGS_CASES='
break;
case OPTION_NO_TLS_OPT:
- notlsopt = 1;
+ no_tls_opt = 1;
+ break;
+
+ case OPTION_NO_OPD_OPT:
+ no_opd_opt = 1;
+ break;
+
+ case OPTION_NO_TOC_OPT:
+ no_toc_opt = 1;
+ break;
+
+ case OPTION_NO_MULTI_TOC:
+ no_multi_toc = 1;
+ break;
+
+ case OPTION_NON_OVERLAPPING_OPD:
+ non_overlapping_opd = 1;
break;
'
# Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
#
-LDEMUL_AFTER_OPEN=ppc_after_open
LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
projects / deliverable / binutils-gdb.git / blobdiff