/* ldcref.c -- output a cross reference table
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1996-2020 Free Software Foundation, Inc.
Written by Ian Lance Taylor <ian@cygnus.com>
-This file is part of GLD, the Gnu Linker.
+ This file is part of the GNU Binutils.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file holds routines that manage the cross reference table.
The table is used to generate cross reference reports. It is also
used to implement the NOCROSSREFS command in the linker script. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "bfdlink.h"
+#include "ctf-api.h"
#include "libiberty.h"
+#include "demangle.h"
+#include "objalloc.h"
#include "ld.h"
#include "ldmain.h"
/* We keep an instance of this structure for each reference to a
symbol from a given object. */
-struct cref_ref {
+struct cref_ref
+{
/* The next reference. */
struct cref_ref *next;
/* The object. */
/* We keep a hash table of symbols. Each entry looks like this. */
-struct cref_hash_entry {
+struct cref_hash_entry
+{
struct bfd_hash_entry root;
/* The demangled name. */
- char *demangled;
+ const char *demangled;
/* References to and definitions of this symbol. */
struct cref_ref *refs;
};
/* This is what the hash table looks like. */
-struct cref_hash_table {
+struct cref_hash_table
+{
struct bfd_hash_table root;
};
static void output_one_cref (FILE *, struct cref_hash_entry *);
static void check_local_sym_xref (lang_input_statement_type *);
static bfd_boolean check_nocrossref (struct cref_hash_entry *, void *);
-static void check_refs (const char *, asection *, bfd *,
+static void check_refs (const char *, bfd_boolean, asection *, bfd *,
struct lang_nocrossrefs *);
static void check_reloc_refs (bfd *, asection *, void *);
static size_t cref_symcount;
+/* Used to take a snapshot of the cref hash table when starting to
+ add syms from an as-needed library. */
+static struct bfd_hash_entry **old_table;
+static unsigned int old_size;
+static unsigned int old_count;
+static void *old_tab;
+static void *alloc_mark;
+static size_t tabsize, entsize, refsize;
+static size_t old_symcount;
+
/* Create an entry in a cref hash table. */
static struct bfd_hash_entry *
struct cref_hash_entry *h;
struct cref_ref *r;
- if (! cref_initialized)
+ if (!cref_initialized)
{
- if (! bfd_hash_table_init (&cref_table.root, cref_hash_newfunc))
+ if (!bfd_hash_table_init (&cref_table.root, cref_hash_newfunc,
+ sizeof (struct cref_hash_entry)))
einfo (_("%X%P: bfd_hash_table_init of cref table failed: %E\n"));
cref_initialized = TRUE;
}
if (r == NULL)
{
- r = xmalloc (sizeof *r);
+ r = (struct cref_ref *) bfd_hash_allocate (&cref_table.root, sizeof *r);
+ if (r == NULL)
+ einfo (_("%X%P: cref alloc failed: %E\n"));
r->next = h->refs;
h->refs = r;
r->abfd = abfd;
r->def = TRUE;
}
+/* Called before loading an as-needed library to take a snapshot of
+ the cref hash table, and after we have loaded or found that the
+ library was not needed. */
+
+bfd_boolean
+handle_asneeded_cref (bfd *abfd ATTRIBUTE_UNUSED,
+ enum notice_asneeded_action act)
+{
+ unsigned int i;
+
+ if (!cref_initialized)
+ return TRUE;
+
+ if (act == notice_as_needed)
+ {
+ char *old_ent, *old_ref;
+
+ for (i = 0; i < cref_table.root.size; i++)
+ {
+ struct bfd_hash_entry *p;
+ struct cref_hash_entry *c;
+ struct cref_ref *r;
+
+ for (p = cref_table.root.table[i]; p != NULL; p = p->next)
+ {
+ entsize += cref_table.root.entsize;
+ c = (struct cref_hash_entry *) p;
+ for (r = c->refs; r != NULL; r = r->next)
+ refsize += sizeof (struct cref_ref);
+ }
+ }
+
+ tabsize = cref_table.root.size * sizeof (struct bfd_hash_entry *);
+ old_tab = xmalloc (tabsize + entsize + refsize);
+
+ alloc_mark = bfd_hash_allocate (&cref_table.root, 1);
+ if (alloc_mark == NULL)
+ return FALSE;
+
+ memcpy (old_tab, cref_table.root.table, tabsize);
+ old_ent = (char *) old_tab + tabsize;
+ old_ref = (char *) old_ent + entsize;
+ old_table = cref_table.root.table;
+ old_size = cref_table.root.size;
+ old_count = cref_table.root.count;
+ old_symcount = cref_symcount;
+
+ for (i = 0; i < cref_table.root.size; i++)
+ {
+ struct bfd_hash_entry *p;
+ struct cref_hash_entry *c;
+ struct cref_ref *r;
+
+ for (p = cref_table.root.table[i]; p != NULL; p = p->next)
+ {
+ memcpy (old_ent, p, cref_table.root.entsize);
+ old_ent = (char *) old_ent + cref_table.root.entsize;
+ c = (struct cref_hash_entry *) p;
+ for (r = c->refs; r != NULL; r = r->next)
+ {
+ memcpy (old_ref, r, sizeof (struct cref_ref));
+ old_ref = (char *) old_ref + sizeof (struct cref_ref);
+ }
+ }
+ }
+ return TRUE;
+ }
+
+ if (act == notice_not_needed)
+ {
+ char *old_ent, *old_ref;
+
+ if (old_tab == NULL)
+ {
+ /* The only way old_tab can be NULL is if the cref hash table
+ had not been initialised when notice_as_needed. */
+ bfd_hash_table_free (&cref_table.root);
+ cref_initialized = FALSE;
+ return TRUE;
+ }
+
+ old_ent = (char *) old_tab + tabsize;
+ old_ref = (char *) old_ent + entsize;
+ cref_table.root.table = old_table;
+ cref_table.root.size = old_size;
+ cref_table.root.count = old_count;
+ memcpy (cref_table.root.table, old_tab, tabsize);
+ cref_symcount = old_symcount;
+
+ for (i = 0; i < cref_table.root.size; i++)
+ {
+ struct bfd_hash_entry *p;
+ struct cref_hash_entry *c;
+ struct cref_ref *r;
+
+ for (p = cref_table.root.table[i]; p != NULL; p = p->next)
+ {
+ memcpy (p, old_ent, cref_table.root.entsize);
+ old_ent = (char *) old_ent + cref_table.root.entsize;
+ c = (struct cref_hash_entry *) p;
+ for (r = c->refs; r != NULL; r = r->next)
+ {
+ memcpy (r, old_ref, sizeof (struct cref_ref));
+ old_ref = (char *) old_ref + sizeof (struct cref_ref);
+ }
+ }
+ }
+
+ objalloc_free_block ((struct objalloc *) cref_table.root.memory,
+ alloc_mark);
+ }
+ else if (act != notice_needed)
+ return FALSE;
+
+ free (old_tab);
+ old_tab = NULL;
+ return TRUE;
+}
+
/* Copy the addresses of the hash table entries into an array. This
is called via cref_hash_traverse. We also fill in the demangled
name. */
static bfd_boolean
cref_fill_array (struct cref_hash_entry *h, void *data)
{
- struct cref_hash_entry ***pph = data;
+ struct cref_hash_entry ***pph = (struct cref_hash_entry ***) data;
ASSERT (h->demangled == NULL);
- h->demangled = demangle (h->root.string);
+ h->demangled = bfd_demangle (link_info.output_bfd, h->root.string,
+ DMGL_ANSI | DMGL_PARAMS);
+ if (h->demangled == NULL)
+ h->demangled = h->root.string;
**pph = h;
static int
cref_sort_array (const void *a1, const void *a2)
{
- const struct cref_hash_entry * const *p1 = a1;
- const struct cref_hash_entry * const *p2 = a2;
+ const struct cref_hash_entry *const *p1
+ = (const struct cref_hash_entry *const *) a1;
+ const struct cref_hash_entry *const *p2
+ = (const struct cref_hash_entry *const *) a2;
- return strcmp ((*p1)->demangled, (*p2)->demangled);
+ if (demangling)
+ return strcmp ((*p1)->demangled, (*p2)->demangled);
+ else
+ return strcmp ((*p1)->root.string, (*p2)->root.string);
}
/* Write out the cref table. */
}
fprintf (fp, _("File\n"));
- if (! cref_initialized)
+ if (!cref_initialized)
{
fprintf (fp, _("No symbols\n"));
return;
}
- csyms = xmalloc (cref_symcount * sizeof (*csyms));
+ csyms = (struct cref_hash_entry **) xmalloc (cref_symcount * sizeof (*csyms));
csym_fill = csyms;
cref_hash_traverse (&cref_table, cref_fill_array, &csym_fill);
hl = bfd_link_hash_lookup (link_info.hash, h->root.string, FALSE,
FALSE, TRUE);
if (hl == NULL)
- einfo ("%P: symbol `%T' missing from main hash table\n",
+ einfo (_("%P: symbol `%pT' missing from main hash table\n"),
h->root.string);
else
{
}
}
- fprintf (fp, "%s ", h->demangled);
- len = strlen (h->demangled) + 1;
+ if (demangling)
+ {
+ fprintf (fp, "%s ", h->demangled);
+ len = strlen (h->demangled) + 1;
+ }
+ else
+ {
+ fprintf (fp, "%s ", h->root.string);
+ len = strlen (h->root.string) + 1;
+ }
for (r = h->refs; r != NULL; r = r->next)
{
putc (' ', fp);
++len;
}
- lfinfo (fp, "%B\n", r->abfd);
+ lfinfo (fp, "%pB\n", r->abfd);
+ len = 0;
+ }
+ }
+
+ for (r = h->refs; r != NULL; r = r->next)
+ {
+ if (r->common)
+ {
+ while (len < FILECOL)
+ {
+ putc (' ', fp);
+ ++len;
+ }
+ lfinfo (fp, "%pB\n", r->abfd);
len = 0;
}
}
for (r = h->refs; r != NULL; r = r->next)
{
- if (! r->def)
+ if (!r->def && !r->common)
{
while (len < FILECOL)
{
putc (' ', fp);
++len;
}
- lfinfo (fp, "%B\n", r->abfd);
+ lfinfo (fp, "%pB\n", r->abfd);
len = 0;
}
}
void
check_nocrossrefs (void)
{
- if (! cref_initialized)
+ if (!cref_initialized)
return;
cref_hash_traverse (&cref_table, check_nocrossref, NULL);
check_local_sym_xref (lang_input_statement_type *statement)
{
bfd *abfd;
- lang_input_statement_type *li;
- asymbol **asymbols, **syms;
+ asymbol **syms;
abfd = statement->the_bfd;
if (abfd == NULL)
return;
- li = abfd->usrdata;
- if (li != NULL && li->asymbols != NULL)
- asymbols = li->asymbols;
- else
- {
- long symsize;
- long symbol_count;
-
- symsize = bfd_get_symtab_upper_bound (abfd);
- if (symsize < 0)
- einfo (_("%B%F: could not read symbols; %E\n"), abfd);
- asymbols = xmalloc (symsize);
- symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
- if (symbol_count < 0)
- einfo (_("%B%F: could not read symbols: %E\n"), abfd);
- if (li != NULL)
- {
- li->asymbols = asymbols;
- li->symbol_count = symbol_count;
- }
- }
+ if (!bfd_generic_link_read_symbols (abfd))
+ einfo (_("%F%P: %pB: could not read symbols: %E\n"), abfd);
- for (syms = asymbols; *syms; ++syms)
+ for (syms = bfd_get_outsymbols (abfd); *syms; ++syms)
{
asymbol *sym = *syms;
if (sym->flags & (BSF_GLOBAL | BSF_WARNING | BSF_INDIRECT | BSF_FILE))
symname = sym->name;
for (ncrs = nocrossref_list; ncrs != NULL; ncrs = ncrs->next)
for (ncr = ncrs->list; ncr != NULL; ncr = ncr->next)
- if (strcmp (ncr->name, outsecname) == 0)
- check_refs (symname, sym->section, abfd, ncrs);
+ {
+ if (strcmp (ncr->name, outsecname) == 0)
+ check_refs (symname, FALSE, sym->section, abfd, ncrs);
+ /* The NOCROSSREFS_TO command only checks symbols defined in
+ the first section in the list. */
+ if (ncrs->onlyfirst)
+ break;
+ }
}
}
-
- if (li == NULL)
- free (asymbols);
}
/* Check one symbol to see if it is a prohibited cross reference. */
FALSE, TRUE);
if (hl == NULL)
{
- einfo (_("%P: symbol `%T' missing from main hash table\n"),
+ einfo (_("%P: symbol `%pT' missing from main hash table\n"),
h->root.string);
return TRUE;
}
defsec = hl->u.def.section->output_section;
if (defsec == NULL)
return TRUE;
- defsecname = bfd_get_section_name (defsec->owner, defsec);
+ defsecname = bfd_section_name (defsec);
for (ncrs = nocrossref_list; ncrs != NULL; ncrs = ncrs->next)
for (ncr = ncrs->list; ncr != NULL; ncr = ncr->next)
- if (strcmp (ncr->name, defsecname) == 0)
- for (ref = h->refs; ref != NULL; ref = ref->next)
- check_refs (hl->root.string, hl->u.def.section, ref->abfd, ncrs);
+ {
+ if (strcmp (ncr->name, defsecname) == 0)
+ for (ref = h->refs; ref != NULL; ref = ref->next)
+ check_refs (hl->root.string, TRUE, hl->u.def.section,
+ ref->abfd, ncrs);
+ /* The NOCROSSREFS_TO command only checks symbols defined in the first
+ section in the list. */
+ if (ncrs->onlyfirst)
+ break;
+ }
return TRUE;
}
/* The struct is used to pass information from check_refs to
check_reloc_refs through bfd_map_over_sections. */
-struct check_refs_info {
+struct check_refs_info
+{
const char *sym_name;
asection *defsec;
struct lang_nocrossrefs *ncrs;
asymbol **asymbols;
+ bfd_boolean global;
};
/* This function is called for each symbol defined in a section which
static void
check_refs (const char *name,
+ bfd_boolean global,
asection *sec,
bfd *abfd,
struct lang_nocrossrefs *ncrs)
{
- lang_input_statement_type *li;
- asymbol **asymbols;
struct check_refs_info info;
/* We need to look through the relocations for this BFD, to see
the BFD in which the symbol is defined, since even a single
BFD might contain a prohibited cross reference. */
- li = abfd->usrdata;
- if (li != NULL && li->asymbols != NULL)
- asymbols = li->asymbols;
- else
- {
- long symsize;
- long symbol_count;
-
- symsize = bfd_get_symtab_upper_bound (abfd);
- if (symsize < 0)
- einfo (_("%B%F: could not read symbols; %E\n"), abfd);
- asymbols = xmalloc (symsize);
- symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
- if (symbol_count < 0)
- einfo (_("%B%F: could not read symbols: %E\n"), abfd);
- if (li != NULL)
- {
- li->asymbols = asymbols;
- li->symbol_count = symbol_count;
- }
- }
+ if (!bfd_generic_link_read_symbols (abfd))
+ einfo (_("%F%P: %pB: could not read symbols: %E\n"), abfd);
info.sym_name = name;
+ info.global = global;
info.defsec = sec;
info.ncrs = ncrs;
- info.asymbols = asymbols;
+ info.asymbols = bfd_get_outsymbols (abfd);
bfd_map_over_sections (abfd, check_reloc_refs, &info);
-
- if (li == NULL)
- free (asymbols);
}
/* This is called via bfd_map_over_sections. INFO->SYM_NAME is a symbol
static void
check_reloc_refs (bfd *abfd, asection *sec, void *iarg)
{
- struct check_refs_info *info = iarg;
+ struct check_refs_info *info = (struct check_refs_info *) iarg;
asection *outsec;
const char *outsecname;
asection *outdefsec;
const char *outdefsecname;
struct lang_nocrossref *ncr;
const char *symname;
+ bfd_boolean global;
long relsize;
arelent **relpp;
long relcount;
arelent **p, **pend;
outsec = sec->output_section;
- outsecname = bfd_get_section_name (outsec->owner, outsec);
+ outsecname = bfd_section_name (outsec);
outdefsec = info->defsec->output_section;
- outdefsecname = bfd_get_section_name (outdefsec->owner, outdefsec);
+ outdefsecname = bfd_section_name (outdefsec);
/* The section where the symbol is defined is permitted. */
if (strcmp (outsecname, outdefsecname) == 0)
/* This section is one for which cross references are prohibited.
Look through the relocations, and see if any of them are to
INFO->SYM_NAME. If INFO->SYMNAME is NULL, check for relocations
- against the section symbol. */
+ against the section symbol. If INFO->GLOBAL is TRUE, the
+ definition is global, check for relocations against the global
+ symbols. Otherwise check for relocations against the local and
+ section symbols. */
symname = info->sym_name;
+ global = info->global;
relsize = bfd_get_reloc_upper_bound (abfd, sec);
if (relsize < 0)
- einfo (_("%B%F: could not read relocs: %E\n"), abfd);
+ einfo (_("%F%P: %pB: could not read relocs: %E\n"), abfd);
if (relsize == 0)
return;
- relpp = xmalloc (relsize);
+ relpp = (arelent **) xmalloc (relsize);
relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols);
if (relcount < 0)
- einfo (_("%B%F: could not read relocs: %E\n"), abfd);
+ einfo (_("%F%P: %pB: could not read relocs: %E\n"), abfd);
p = relpp;
pend = p + relcount;
if (q->sym_ptr_ptr != NULL
&& *q->sym_ptr_ptr != NULL
+ && ((global
+ && (bfd_is_und_section (bfd_asymbol_section (*q->sym_ptr_ptr))
+ || bfd_is_com_section (bfd_asymbol_section (*q->sym_ptr_ptr))
+ || ((*q->sym_ptr_ptr)->flags & (BSF_GLOBAL
+ | BSF_WEAK)) != 0))
+ || (!global
+ && ((*q->sym_ptr_ptr)->flags & (BSF_LOCAL
+ | BSF_SECTION_SYM)) != 0
+ && bfd_asymbol_section (*q->sym_ptr_ptr) == info->defsec))
&& (symname != NULL
? strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), symname) == 0
- : (((*q->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
- && bfd_get_section (*q->sym_ptr_ptr) == info->defsec)))
+ : ((*q->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0))
{
/* We found a reloc for the symbol. The symbol is defined
in OUTSECNAME. This reloc is from a section which is
mapped into a section from which references to OUTSECNAME
are prohibited. We must report an error. */
- einfo (_("%X%C: prohibited cross reference from %s to `%T' in %s\n"),
+ einfo (_("%X%P: %C: prohibited cross reference from %s to `%pT' in %s\n"),
abfd, sec, q->address, outsecname,
bfd_asymbol_name (*q->sym_ptr_ptr), outdefsecname);
}
projects / deliverable / binutils-gdb.git / blobdiff