/* Plugin control for the GNU linker.
- Copyright (C) 2010-2018 Free Software Foundation, Inc.
+ Copyright (C) 2010-2020 Free Software Foundation, Inc.
This file is part of the GNU Binutils.
#include "bfd.h"
#include "bfdlink.h"
#include "bfdver.h"
+#include "ctf-api.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
flags = BSF_GLOBAL;
section = bfd_com_section_ptr;
asym->value = ldsym->size;
- /* For ELF targets, set alignment of common symbol to 1. */
- if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
- {
- ((elf_symbol_type *) asym)->internal_elf_sym.st_shndx = SHN_COMMON;
- ((elf_symbol_type *) asym)->internal_elf_sym.st_value = 1;
- }
break;
default:
asym->flags = flags;
asym->section = section;
- /* Visibility only applies on ELF targets. */
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
elf_symbol_type *elfsym = elf_symbol_from (abfd, asym);
if (!elfsym)
einfo (_("%F%P: %s: non-ELF symbol in ELF BFD!\n"), asym->name);
+
+ if (ldsym->def == LDPK_COMMON)
+ {
+ elfsym->internal_elf_sym.st_shndx = SHN_COMMON;
+ elfsym->internal_elf_sym.st_value = 1;
+ }
+
switch (ldsym->visibility)
{
default:
visibility = STV_HIDDEN;
break;
}
- elfsym->internal_elf_sym.st_other
- = (visibility | (elfsym->internal_elf_sym.st_other
- & ~ELF_ST_VISIBILITY (-1)));
+ elfsym->internal_elf_sym.st_other |= visibility;
}
return LDPS_OK;
is_visible_from_outside (struct ld_plugin_symbol *lsym,
struct bfd_link_hash_entry *blhe)
{
- struct bfd_sym_chain *sym;
-
if (bfd_link_relocatable (&link_info))
return TRUE;
if (blhe->non_ir_ref_dynamic
|| lsym->visibility == LDPV_PROTECTED);
}
- for (sym = &entry_symbol; sym != NULL; sym = sym->next)
- if (sym->name
- && strcmp (sym->name, blhe->root.string) == 0)
- return TRUE;
-
return FALSE;
}
+/* Return LTO kind string name that corresponds to IDX enum value. */
+static const char *
+get_lto_kind (unsigned int idx)
+{
+ static char buffer[64];
+ const char *lto_kind_str[5] =
+ {
+ "DEF",
+ "WEAKDEF",
+ "UNDEF",
+ "WEAKUNDEF",
+ "COMMON"
+ };
+
+ if (idx < ARRAY_SIZE (lto_kind_str))
+ return lto_kind_str [idx];
+
+ sprintf (buffer, _("unknown LTO kind value %x"), idx);
+ return buffer;
+}
+
+/* Return LTO resolution string name that corresponds to IDX enum value. */
+static const char *
+get_lto_resolution (unsigned int idx)
+{
+ static char buffer[64];
+ static const char *lto_resolution_str[10] =
+ {
+ "UNKNOWN",
+ "UNDEF",
+ "PREVAILING_DEF",
+ "PREVAILING_DEF_IRONLY",
+ "PREEMPTED_REG",
+ "PREEMPTED_IR",
+ "RESOLVED_IR",
+ "RESOLVED_EXEC",
+ "RESOLVED_DYN",
+ "PREVAILING_DEF_IRONLY_EXP",
+ };
+
+ if (idx < ARRAY_SIZE (lto_resolution_str))
+ return lto_resolution_str [idx];
+
+ sprintf (buffer, _("unknown LTO resolution value %x"), idx);
+ return buffer;
+}
+
+/* Return LTO visibility string name that corresponds to IDX enum value. */
+static const char *
+get_lto_visibility (unsigned int idx)
+{
+ static char buffer[64];
+ const char *lto_visibility_str[4] =
+ {
+ "DEFAULT",
+ "PROTECTED",
+ "INTERNAL",
+ "HIDDEN"
+ };
+
+ if (idx < ARRAY_SIZE (lto_visibility_str))
+ return lto_visibility_str [idx];
+
+ sprintf (buffer, _("unknown LTO visibility value %x"), idx);
+ return buffer;
+}
+
/* Get the symbol resolution info for a plugin-claimed input file. */
static enum ld_plugin_status
get_symbols (const void *handle, int nsyms, struct ld_plugin_symbol *syms,
struct bfd_link_hash_entry *blhe;
asection *owner_sec;
int res;
+ struct bfd_link_hash_entry *h
+ = bfd_link_hash_lookup (link_info.hash, syms[n].name,
+ FALSE, FALSE, TRUE);
+ enum { wrap_none, wrapper, wrapped } wrap_status = wrap_none;
- if (syms[n].def != LDPK_UNDEF)
- blhe = bfd_link_hash_lookup (link_info.hash, syms[n].name,
- FALSE, FALSE, TRUE);
+ if (syms[n].def != LDPK_UNDEF && syms[n].def != LDPK_WEAKUNDEF)
+ {
+ blhe = h;
+ if (blhe && link_info.wrap_hash != NULL)
+ {
+ /* Check if a symbol is a wrapper symbol. */
+ struct bfd_link_hash_entry *unwrap
+ = unwrap_hash_lookup (&link_info, (bfd *) abfd, blhe);
+ if (unwrap && unwrap != h)
+ wrap_status = wrapper;
+ }
+ }
else
- blhe = bfd_wrapped_link_hash_lookup (link_info.output_bfd, &link_info,
- syms[n].name, FALSE, FALSE, TRUE);
+ {
+ blhe = bfd_wrapped_link_hash_lookup (link_info.output_bfd,
+ &link_info, syms[n].name,
+ FALSE, FALSE, TRUE);
+ /* Check if a symbol is a wrapped symbol. */
+ if (blhe && blhe != h)
+ wrap_status = wrapped;
+ }
if (!blhe)
{
/* The plugin is called to claim symbols in an archive element
/* We need to know if the sym is referenced from non-IR files. Or
even potentially-referenced, perhaps in a future final link if
this is a partial one, perhaps dynamically at load-time if the
- symbol is externally visible. */
- if (blhe->non_ir_ref_regular)
+ symbol is externally visible. Also check for wrapper symbol. */
+ if (blhe->non_ir_ref_regular || wrap_status == wrapper)
res = LDPR_PREVAILING_DEF;
+ else if (wrap_status == wrapped)
+ res = LDPR_RESOLVED_IR;
else if (is_visible_from_outside (&syms[n], blhe))
res = def_ironly_exp;
}
syms[n].resolution = res;
if (report_plugin_symbols)
einfo (_("%P: %pB: symbol `%s' "
- "definition: %d, visibility: %d, resolution: %d\n"),
+ "definition: %s, visibility: %s, resolution: %s\n"),
abfd, syms[n].name,
- syms[n].def, syms[n].visibility, res);
+ get_lto_kind (syms[n].def),
+ get_lto_visibility (syms[n].visibility),
+ get_lto_resolution (res));
}
return LDPS_OK;
}
{
if (curplug->claim_file_handler)
{
- off_t cur_offset;
enum ld_plugin_status rv;
called_plugin = curplug;
- cur_offset = lseek (file->fd, 0, SEEK_CUR);
rv = (*curplug->claim_file_handler) (file, claimed);
- if (!*claimed)
- lseek (file->fd, cur_offset, SEEK_SET);
called_plugin = NULL;
if (rv != LDPS_OK)
set_plugin_error (curplug->name);
}
file.handle = input;
- /* The plugin API expects that the file descriptor won't be closed
- and reused as done by the bfd file cache. So dup one. */
- file.fd = dup (file.fd);
- if (file.fd < 0)
- return NULL;
-
input->abfd = abfd;
input->view_buffer.addr = NULL;
input->view_buffer.filesize = 0;
ref = TRUE;
}
- /* Otherwise, it must be a new def. */
- else
+
+ /* A common symbol should be merged with other commons or
+ defs with the same name. In particular, a common ought
+ to be overridden by a def in a -flto object. In that
+ sense a common is also a ref. */
+ else if (bfd_is_com_section (section))
{
- /* Ensure any symbol defined in an IR dummy BFD takes on a
- new value from a real BFD. Weak symbols are not normally
- overridden by a new weak definition, and strong symbols
- will normally cause multiple definition errors. Avoid
- this by making the symbol appear to be undefined. */
- if (((h->type == bfd_link_hash_defweak
- || h->type == bfd_link_hash_defined)
- && is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
- || (h->type == bfd_link_hash_common
- && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner)))
+ if (h->type == bfd_link_hash_common
+ && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner))
{
h->type = bfd_link_hash_undefweak;
h->u.undef.abfd = sym_bfd;
}
+ ref = TRUE;
+ }
- /* A common symbol should be merged with other commons or
- defs with the same name. In particular, a common ought
- to be overridden by a def in a -flto object. In that
- sense a common is also a ref. */
- if (bfd_is_com_section (section))
- ref = TRUE;
+ /* Otherwise, it must be a new def.
+ Ensure any symbol defined in an IR dummy BFD takes on a
+ new value from a real BFD. Weak symbols are not normally
+ overridden by a new weak definition, and strong symbols
+ will normally cause multiple definition errors. Avoid
+ this by making the symbol appear to be undefined. */
+ else if (((h->type == bfd_link_hash_defweak
+ || h->type == bfd_link_hash_defined)
+ && is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
+ || (h->type == bfd_link_hash_common
+ && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner)))
+ {
+ h->type = bfd_link_hash_undefweak;
+ h->u.undef.abfd = sym_bfd;
}
if (ref)
projects / deliverable / binutils-gdb.git / blobdiff