+/* Scan a SunOs dynamic symbol table for symbols of interest and
+ add them to the minimal symbol table. */
+
+static void
+read_dbx_dynamic_symtab (section_offsets, objfile)
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+{
+ bfd *abfd = objfile->obfd;
+ struct cleanup *back_to;
+ int counter;
+ long dynsym_size;
+ long dynsym_count;
+ asymbol **dynsyms;
+ asymbol **symptr;
+ arelent **relptr;
+ long dynrel_size;
+ long dynrel_count;
+ arelent **dynrels;
+ CORE_ADDR sym_value;
+ char *name;
+
+ /* Check that the symbol file has dynamic symbols that we know about.
+ bfd_arch_unknown can happen if we are reading a sun3 symbol file
+ on a sun4 host (and vice versa) and bfd is not configured
+ --with-target=all. This would trigger an assertion in bfd/sunos.c,
+ so we ignore the dynamic symbols in this case. */
+ if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
+ || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
+ || bfd_get_arch (abfd) == bfd_arch_unknown)
+ return;
+
+ dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
+ if (dynsym_size < 0)
+ return;
+
+ dynsyms = (asymbol **) xmalloc (dynsym_size);
+ back_to = make_cleanup (free, dynsyms);
+
+ dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
+ if (dynsym_count < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ /* Enter dynamic symbols into the minimal symbol table
+ if this is a stripped executable. */
+ if (bfd_get_symcount (abfd) <= 0)
+ {
+ symptr = dynsyms;
+ for (counter = 0; counter < dynsym_count; counter++, symptr++)
+ {
+ asymbol *sym = *symptr;
+ asection *sec;
+ int type;
+
+ sec = bfd_get_section (sym);
+
+ /* BFD symbols are section relative. */
+ sym_value = sym->value + sec->vma;
+
+ if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ type = N_TEXT;
+ }
+ else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_DATA);
+ type = N_DATA;
+ }
+ else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_BSS);
+ type = N_BSS;
+ }
+ else
+ continue;
+
+ if (sym->flags & BSF_GLOBAL)
+ type |= N_EXT;
+
+ record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
+ type, objfile);
+ }
+ }
+
+ /* Symbols from shared libraries have a dynamic relocation entry
+ that points to the associated slot in the procedure linkage table.
+ We make a mininal symbol table entry with type mst_solib_trampoline
+ at the address in the procedure linkage table. */
+ dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
+ if (dynrel_size < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ dynrels = (arelent **) xmalloc (dynrel_size);
+ make_cleanup (free, dynrels);
+
+ dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
+ if (dynrel_count < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ for (counter = 0, relptr = dynrels;
+ counter < dynrel_count;
+ counter++, relptr++)
+ {
+ arelent *rel = *relptr;
+ CORE_ADDR address =
+ rel->address + ANOFFSET (section_offsets, SECT_OFF_DATA);
+
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_sparc:
+ if (rel->howto->type != RELOC_JMP_SLOT)
+ continue;
+ break;
+ case bfd_arch_m68k:
+ /* `16' is the type BFD produces for a jump table relocation. */
+ if (rel->howto->type != 16)
+ continue;
+
+ /* Adjust address in the jump table to point to
+ the start of the bsr instruction. */
+ address -= 2;
+ break;
+ default:
+ continue;
+ }
+
+ name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
+ prim_record_minimal_symbol
+ (obsavestring (name, strlen (name), &objfile -> symbol_obstack),
+ address,
+ mst_solib_trampoline,
+ objfile);
+ }
+
+ do_cleanups (back_to);
+}
+
projects / binutils.git / blobdiff