# This shell script emits a C file. -*- C -*-
-# Copyright 2002 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;
/* Whether to add ".foo" entries for each "foo" in a version script. */
static int dotsyms = 1;
-static void ppc_create_output_section_statements PARAMS ((void));
-static asection *ppc_add_stub_section PARAMS ((const char *, asection *));
-static void ppc_layout_sections_again PARAMS ((void));
-static void gld${EMULATION_NAME}_after_allocation PARAMS ((void));
-static void build_section_lists PARAMS ((lang_statement_union_type *));
-static struct bfd_elf_version_expr *gld${EMULATION_NAME}_new_vers_pattern
- PARAMS ((struct bfd_elf_version_expr *));
+/* Whether to run tls optimization. */
+static int notlsopt = 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. */
static void
-ppc_create_output_section_statements ()
+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.hash->creator != &bfd_elf64_powerpc_vec
+ && 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);
}
ldlang_add_file (stub_file);
+ ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
}
+static void
+ppc_before_allocation (void)
+{
+ if (stub_file != NULL)
+ {
+ if (!ppc64_elf_edit_opd (output_bfd, &link_info, non_overlapping_opd))
+ {
+ einfo ("%X%P: can not edit opd %E\n");
+ return;
+ }
+
+ if (ppc64_elf_tls_setup (output_bfd, &link_info) && !notlsopt)
+ {
+ /* Size the sections. This is premature, but we want to know the
+ TLS segment layout so that certain optimizations can be done. */
+ lang_size_sections (stat_ptr->head, abs_output_section,
+ &stat_ptr->head, 0, 0, NULL, TRUE);
+
+ if (!ppc64_elf_tls_optimize (output_bfd, &link_info))
+ {
+ einfo ("%X%P: TLS problem %E\n");
+ return;
+ }
+
+ /* We must not cache anything from the preliminary sizing. */
+ elf_tdata (output_bfd)->program_header_size = 0;
+ lang_reset_memory_regions ();
+ }
+ }
+
+ gld${EMULATION_NAME}_before_allocation ();
+}
struct hook_stub_info
{
/* Traverse the linker tree to find the spot where the stub goes. */
-static boolean hook_in_stub
- PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
-
-static boolean
-hook_in_stub (info, lp)
- struct hook_stub_info *info;
- lang_statement_union_type **lp;
+static bfd_boolean
+hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
{
lang_statement_union_type *l;
- boolean ret;
+ bfd_boolean ret;
for (; (l = *lp) != NULL; lp = &l->header.next)
{
before its associated input section. */
*lp = info->add.head;
*(info->add.tail) = l;
- return true;
+ return TRUE;
}
break;
break;
}
}
- return false;
+ return FALSE;
}
immediately before INPUT_SECTION. */
static asection *
-ppc_add_stub_section (stub_sec_name, input_section)
- const char *stub_sec_name;
- asection *input_section;
+ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
{
asection *stub_sec;
flagword flags;
if (info.add.head == NULL)
goto err_ret;
+ stub_added = 1;
if (hook_in_stub (&info, &os->children.head))
return stub_sec;
/* Another call-back for ppc64_elf_size_stubs. */
static void
-ppc_layout_sections_again ()
+ppc_layout_sections_again (void)
{
/* If we have changed sizes of the stub sections, then we need
to recalculate all the section offsets. This may mean we need to
/* Resize the sections. */
lang_size_sections (stat_ptr->head, abs_output_section,
- &stat_ptr->head, 0, (bfd_vma) 0, NULL);
+ &stat_ptr->head, 0, 0, NULL, TRUE);
/* Recalculate TOC base. */
ldemul_after_allocation ();
/* Do the assignments again. */
- lang_do_assignments (stat_ptr->head, abs_output_section,
- (fill_type *) 0, (bfd_vma) 0);
+ lang_do_assignments (stat_ptr->head, abs_output_section, NULL, 0);
}
/* Call the back-end function to set TOC base after we have placed all
the sections. */
static void
-gld${EMULATION_NAME}_after_allocation ()
+gld${EMULATION_NAME}_after_allocation (void)
{
- if (!link_info.relocateable)
+ if (!link_info.relocatable)
_bfd_set_gp_value (output_bfd, ppc64_elf_toc (output_bfd));
}
static void
-build_section_lists (statement)
- lang_statement_union_type *statement;
+build_toc_list (lang_statement_union_type *statement)
{
if (statement->header.type == lang_input_section_enum
&& !statement->input_section.ifile->just_syms_flag
+ && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
+ && statement->input_section.section->output_section == toc_section)
+ ppc64_elf_next_toc_section (&link_info, statement->input_section.section);
+}
+
+
+static void
+build_section_lists (lang_statement_union_type *statement)
+{
+ if (statement->header.type == lang_input_section_enum
+ && !statement->input_section.ifile->just_syms_flag
+ && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
&& statement->input_section.section->output_section != NULL
&& statement->input_section.section->output_section->owner == output_bfd)
{
- ppc64_elf_next_input_section (&link_info,
- statement->input_section.section);
+ if (!ppc64_elf_next_input_section (&link_info,
+ statement->input_section.section))
+ einfo ("%X%P: can not size stub section: %E\n");
}
}
/* Final emulation specific call. */
static void
-gld${EMULATION_NAME}_finish ()
+gld${EMULATION_NAME}_finish (void)
{
- int ret;
-
/* e_entry on PowerPC64 points to the function descriptor for
_start. If _start is missing, default to the first function
descriptor in the .opd section. */
entry_section = ".opd";
- /* If generating a relocatable output file, then we don't have any
- stubs. */
- if (link_info.relocateable)
- return;
-
- /* bfd_elf64_discard_info just plays with debugging sections,
+ /* bfd_elf_discard_info just plays with debugging sections,
ie. doesn't affect any code, so we can delay resizing the
sections. It's likely we'll resize everything in the process of
adding stubs. */
- if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
+ if (bfd_elf_discard_info (output_bfd, &link_info))
need_laying_out = 1;
- ret = ppc64_elf_setup_section_lists (output_bfd, &link_info);
- if (ret != 0)
+ /* If generating a relocatable output file, then we don't have any
+ stubs. */
+ if (stub_file != NULL && !link_info.relocatable)
{
- if (ret < 0)
+ int ret = ppc64_elf_setup_section_lists (output_bfd, &link_info);
+ if (ret != 0)
{
- einfo ("%X%P: can not size stub section: %E\n");
- return;
- }
+ if (ret < 0)
+ {
+ einfo ("%X%P: can not size stub section: %E\n");
+ return;
+ }
- lang_for_each_statement (build_section_lists);
+ 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,
- &ppc_layout_sections_again))
- {
- einfo ("%X%P: can not size stub section: %E\n");
- return;
+ ppc64_elf_reinit_toc (output_bfd, &link_info);
+
+ lang_for_each_statement (build_section_lists);
+
+ /* Call into the BFD backend to do the real work. */
+ if (!ppc64_elf_size_stubs (output_bfd,
+ &link_info,
+ group_size,
+ &ppc_add_stub_section,
+ &ppc_layout_sections_again))
+ {
+ einfo ("%X%P: can not size stub section: %E\n");
+ return;
+ }
}
}
if (need_laying_out)
ppc_layout_sections_again ();
- if (stub_file->the_bfd->sections != NULL)
+ if (link_info.relocatable)
{
- if (!ppc64_elf_build_stubs (&link_info))
+ 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;
+
+ if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
+ config.stats ? &msg : NULL))
einfo ("%X%P: can not build stubs: %E\n");
+
+ for (line = msg; line != NULL; line = endline)
+ {
+ endline = strchr (line, '\n');
+ if (endline != NULL)
+ *endline++ = '\0';
+ fprintf (stderr, "%s: %s\n", program_name, line);
+ }
+ if (msg != NULL)
+ free (msg);
}
+
+ ppc64_elf_restore_symbols (&link_info);
}
exported. Lack of an exported function code sym may cause a
definition to be pulled in from a static library. */
-struct bfd_elf_version_expr *
-gld${EMULATION_NAME}_new_vers_pattern (entry)
- struct bfd_elf_version_expr *entry;
+static struct bfd_elf_version_expr *
+gld${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 (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 = (struct bfd_elf_version_expr *) xmalloc (sizeof *dot_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;
}
/* Avoid processing the fake stub_file in vercheck, stat_needed and
check_needed routines. */
-static void ppc_for_each_input_file_wrapper
- PARAMS ((lang_input_statement_type *));
-static void ppc_lang_for_each_input_file
- PARAMS ((void (*) (lang_input_statement_type *)));
-
-static void (*real_func) PARAMS ((lang_input_statement_type *));
+static void (*real_func) (lang_input_statement_type *);
-static void ppc_for_each_input_file_wrapper (l)
- lang_input_statement_type *l;
+static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l)
{
if (l != stub_file)
(*real_func) (l);
}
static void
-ppc_lang_for_each_input_file (func)
- void (*func) PARAMS ((lang_input_statement_type *));
+ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
{
real_func = func;
lang_for_each_input_file (&ppc_for_each_input_file_wrapper);
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_STUBGROUP_SIZE 301
-#define OPTION_DOTSYMS (OPTION_STUBGROUP_SIZE + 1)
+#define OPTION_STUBSYMS (OPTION_STUBGROUP_SIZE + 1)
+#define OPTION_DOTSYMS (OPTION_STUBSYMS + 1)
#define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1)
+#define OPTION_NO_TLS_OPT (OPTION_NO_DOTSYMS + 1)
+#define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_TLS_OPT + 1)
'
-# The options are repeated below so that no abbreviations are allowed.
-# Otherwise -s matches stub-group-size
PARSE_AND_LIST_LONGOPTS='
{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
- { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
- { "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
+ { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
{ "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
{ "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
- { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
+ { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
+ { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
'
PARSE_AND_LIST_OPTIONS='
the linker should choose suitable defaults.\n"
));
fprintf (file, _("\
+ --emit-stub-syms Label linker stubs with a symbol.\n"
+ ));
+ fprintf (file, _("\
--dotsyms For every version pattern \"foo\" in a version script,\n\
add \".foo\" so that function code symbols are\n\
treated the same as function descriptor symbols.\n\
fprintf (file, _("\
--no-dotsyms Don'\''t do anything special in version scripts.\n"
));
+ fprintf (file, _("\
+ --no-tls-optimize Don'\''t try to optimize TLS accesses.\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_STUBSYMS:
+ emit_stub_syms = 1;
+ break;
+
case OPTION_DOTSYMS:
- {
- dotsyms = 1;
- }
+ dotsyms = 1;
break;
case OPTION_NO_DOTSYMS:
- {
- dotsyms = 0;
- }
+ dotsyms = 0;
+ break;
+
+ case OPTION_NO_TLS_OPT:
+ notlsopt = 1;
+ break;
+
+ case OPTION_NON_OVERLAPPING_OPD:
+ non_overlapping_opd = 1;
break;
'
# Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
#
+LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements
projects / deliverable / binutils-gdb.git / blobdiff