| /* Read coff symbol tables and convert to internal format, for GDB. |
| Copyright (C) 1987-2021 Free Software Foundation, Inc. |
| Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
| |
| This file is part of GDB. |
| |
| 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. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "demangle.h" |
| #include "breakpoint.h" |
| |
| #include "bfd.h" |
| #include "gdb_obstack.h" |
| #include <ctype.h> |
| |
| #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ |
| #include "libcoff.h" /* FIXME secret internal data from BFD */ |
| #include "objfiles.h" |
| #include "buildsym-legacy.h" |
| #include "stabsread.h" |
| #include "complaints.h" |
| #include "target.h" |
| #include "block.h" |
| #include "dictionary.h" |
| #include "dwarf2/public.h" |
| |
| #include "coff-pe-read.h" |
| |
| #include "psymtab.h" |
| #include "build-id.h" |
| |
| /* The objfile we are currently reading. */ |
| |
| static struct objfile *coffread_objfile; |
| |
| struct coff_symfile_info |
| { |
| file_ptr min_lineno_offset = 0; /* Where in file lowest line#s are. */ |
| file_ptr max_lineno_offset = 0; /* 1+last byte of line#s in file. */ |
| |
| CORE_ADDR textaddr = 0; /* Addr of .text section. */ |
| unsigned int textsize = 0; /* Size of .text section. */ |
| std::vector<asection *> *stabsects; /* .stab sections. */ |
| asection *stabstrsect = nullptr; /* Section pointer for .stab section. */ |
| char *stabstrdata = nullptr; |
| }; |
| |
| /* Key for COFF-associated data. */ |
| |
| static const struct objfile_key<coff_symfile_info> coff_objfile_data_key; |
| |
| /* Translate an external name string into a user-visible name. */ |
| #define EXTERNAL_NAME(string, abfd) \ |
| (string[0] == bfd_get_symbol_leading_char (abfd) \ |
| ? string + 1 : string) |
| |
| /* To be an sdb debug type, type must have at least a basic or primary |
| derived type. Using this rather than checking against T_NULL is |
| said to prevent core dumps if we try to operate on Michael Bloom |
| dbx-in-coff file. */ |
| |
| #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) |
| |
| /* Core address of start and end of text of current source file. |
| This comes from a ".text" symbol where x_nlinno > 0. */ |
| |
| static CORE_ADDR current_source_start_addr; |
| static CORE_ADDR current_source_end_addr; |
| |
| /* The addresses of the symbol table stream and number of symbols |
| of the object file we are reading (as copied into core). */ |
| |
| static bfd *nlist_bfd_global; |
| static int nlist_nsyms_global; |
| |
| |
| /* Pointers to scratch storage, used for reading raw symbols and |
| auxents. */ |
| |
| static char *temp_sym; |
| static char *temp_aux; |
| |
| /* Local variables that hold the shift and mask values for the |
| COFF file that we are currently reading. These come back to us |
| from BFD, and are referenced by their macro names, as well as |
| internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF |
| macros from include/coff/internal.h . */ |
| |
| static unsigned local_n_btmask; |
| static unsigned local_n_btshft; |
| static unsigned local_n_tmask; |
| static unsigned local_n_tshift; |
| |
| #define N_BTMASK local_n_btmask |
| #define N_BTSHFT local_n_btshft |
| #define N_TMASK local_n_tmask |
| #define N_TSHIFT local_n_tshift |
| |
| /* Local variables that hold the sizes in the file of various COFF |
| structures. (We only need to know this to read them from the file |
| -- BFD will then translate the data in them, into `internal_xxx' |
| structs in the right byte order, alignment, etc.) */ |
| |
| static unsigned local_linesz; |
| static unsigned local_symesz; |
| static unsigned local_auxesz; |
| |
| /* This is set if this is a PE format file. */ |
| |
| static int pe_file; |
| |
| /* Chain of typedefs of pointers to empty struct/union types. |
| They are chained thru the SYMBOL_VALUE_CHAIN. */ |
| |
| static struct symbol *opaque_type_chain[HASHSIZE]; |
| |
| /* Simplified internal version of coff symbol table information. */ |
| |
| struct coff_symbol |
| { |
| char *c_name; |
| int c_symnum; /* Symbol number of this entry. */ |
| int c_naux; /* 0 if syment only, 1 if syment + |
| auxent, etc. */ |
| CORE_ADDR c_value; |
| int c_sclass; |
| int c_secnum; |
| unsigned int c_type; |
| }; |
| |
| /* Vector of types defined so far, indexed by their type numbers. */ |
| |
| static struct type **type_vector; |
| |
| /* Number of elements allocated for type_vector currently. */ |
| |
| static int type_vector_length; |
| |
| /* Initial size of type vector. Is realloc'd larger if needed, and |
| realloc'd down to the size actually used, when completed. */ |
| |
| #define INITIAL_TYPE_VECTOR_LENGTH 160 |
| |
| static char *linetab = NULL; |
| static file_ptr linetab_offset; |
| static file_ptr linetab_size; |
| |
| static char *stringtab = NULL; |
| |
| extern void stabsread_clear_cache (void); |
| |
| static struct type *coff_read_struct_type (int, int, int, |
| struct objfile *); |
| |
| static struct type *decode_base_type (struct coff_symbol *, |
| unsigned int, |
| union internal_auxent *, |
| struct objfile *); |
| |
| static struct type *decode_type (struct coff_symbol *, unsigned int, |
| union internal_auxent *, |
| struct objfile *); |
| |
| static struct type *decode_function_type (struct coff_symbol *, |
| unsigned int, |
| union internal_auxent *, |
| struct objfile *); |
| |
| static struct type *coff_read_enum_type (int, int, int, |
| struct objfile *); |
| |
| static struct symbol *process_coff_symbol (struct coff_symbol *, |
| union internal_auxent *, |
| struct objfile *); |
| |
| static void patch_opaque_types (struct symtab *); |
| |
| static void enter_linenos (file_ptr, int, int, struct objfile *); |
| |
| static int init_lineno (bfd *, file_ptr, file_ptr, gdb::unique_xmalloc_ptr<char> *); |
| |
| static char *getsymname (struct internal_syment *); |
| |
| static const char *coff_getfilename (union internal_auxent *); |
| |
| static int init_stringtab (bfd *, file_ptr, gdb::unique_xmalloc_ptr<char> *); |
| |
| static void read_one_sym (struct coff_symbol *, |
| struct internal_syment *, |
| union internal_auxent *); |
| |
| static void coff_symtab_read (minimal_symbol_reader &, |
| file_ptr, unsigned int, struct objfile *); |
| |
| /* We are called once per section from coff_symfile_read. We |
| need to examine each section we are passed, check to see |
| if it is something we are interested in processing, and |
| if so, stash away some access information for the section. |
| |
| FIXME: The section names should not be hardwired strings (what |
| should they be? I don't think most object file formats have enough |
| section flags to specify what kind of debug section it is |
| -kingdon). */ |
| |
| static void |
| coff_locate_sections (bfd *abfd, asection *sectp, void *csip) |
| { |
| struct coff_symfile_info *csi; |
| const char *name; |
| |
| csi = (struct coff_symfile_info *) csip; |
| name = bfd_section_name (sectp); |
| if (strcmp (name, ".text") == 0) |
| { |
| csi->textaddr = bfd_section_vma (sectp); |
| csi->textsize += bfd_section_size (sectp); |
| } |
| else if (startswith (name, ".text")) |
| { |
| csi->textsize += bfd_section_size (sectp); |
| } |
| else if (strcmp (name, ".stabstr") == 0) |
| { |
| csi->stabstrsect = sectp; |
| } |
| else if (startswith (name, ".stab")) |
| { |
| const char *s; |
| |
| /* We can have multiple .stab sections if linked with |
| --split-by-reloc. */ |
| for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) |
| if (!isdigit (*s)) |
| break; |
| if (*s == '\0') |
| csi->stabsects->push_back (sectp); |
| } |
| } |
| |
| /* Return the section_offsets* that CS points to. */ |
| static int cs_to_section (struct coff_symbol *, struct objfile *); |
| |
| struct find_targ_sec_arg |
| { |
| int targ_index; |
| asection **resultp; |
| }; |
| |
| static void |
| find_targ_sec (bfd *abfd, asection *sect, void *obj) |
| { |
| struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
| |
| if (sect->target_index == args->targ_index) |
| *args->resultp = sect; |
| } |
| |
| /* Return the bfd_section that CS points to. */ |
| static struct bfd_section* |
| cs_to_bfd_section (struct coff_symbol *cs, struct objfile *objfile) |
| { |
| asection *sect = NULL; |
| struct find_targ_sec_arg args; |
| |
| args.targ_index = cs->c_secnum; |
| args.resultp = § |
| bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| return sect; |
| } |
| |
| /* Return the section number (SECT_OFF_*) that CS points to. */ |
| static int |
| cs_to_section (struct coff_symbol *cs, struct objfile *objfile) |
| { |
| asection *sect = cs_to_bfd_section (cs, objfile); |
| |
| if (sect == NULL) |
| return SECT_OFF_TEXT (objfile); |
| return gdb_bfd_section_index (objfile->obfd, sect); |
| } |
| |
| /* Return the address of the section of a COFF symbol. */ |
| |
| static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *); |
| |
| static CORE_ADDR |
| cs_section_address (struct coff_symbol *cs, bfd *abfd) |
| { |
| asection *sect = NULL; |
| struct find_targ_sec_arg args; |
| CORE_ADDR addr = 0; |
| |
| args.targ_index = cs->c_secnum; |
| args.resultp = § |
| bfd_map_over_sections (abfd, find_targ_sec, &args); |
| if (sect != NULL) |
| addr = bfd_section_vma (sect); |
| return addr; |
| } |
| |
| /* Look up a coff type-number index. Return the address of the slot |
| where the type for that index is stored. |
| The type-number is in INDEX. |
| |
| This can be used for finding the type associated with that index |
| or for associating a new type with the index. */ |
| |
| static struct type ** |
| coff_lookup_type (int index) |
| { |
| if (index >= type_vector_length) |
| { |
| int old_vector_length = type_vector_length; |
| |
| type_vector_length *= 2; |
| if (index /* is still */ >= type_vector_length) |
| type_vector_length = index * 2; |
| |
| type_vector = (struct type **) |
| xrealloc ((char *) type_vector, |
| type_vector_length * sizeof (struct type *)); |
| memset (&type_vector[old_vector_length], 0, |
| (type_vector_length - old_vector_length) * sizeof (struct type *)); |
| } |
| return &type_vector[index]; |
| } |
| |
| /* Make sure there is a type allocated for type number index |
| and return the type object. |
| This can create an empty (zeroed) type object. */ |
| |
| static struct type * |
| coff_alloc_type (int index) |
| { |
| struct type **type_addr = coff_lookup_type (index); |
| struct type *type = *type_addr; |
| |
| /* If we are referring to a type not known at all yet, |
| allocate an empty type for it. |
| We will fill it in later if we find out how. */ |
| if (type == NULL) |
| { |
| type = alloc_type (coffread_objfile); |
| *type_addr = type; |
| } |
| return type; |
| } |
| |
| /* Start a new symtab for a new source file. |
| This is called when a COFF ".file" symbol is seen; |
| it indicates the start of data for one original source file. */ |
| |
| static void |
| coff_start_symtab (struct objfile *objfile, const char *name) |
| { |
| within_function = 0; |
| start_symtab (objfile, |
| name, |
| /* We never know the directory name for COFF. */ |
| NULL, |
| /* The start address is irrelevant, since we call |
| set_last_source_start_addr in coff_end_symtab. */ |
| 0, |
| /* Let buildsym.c deduce the language for this symtab. */ |
| language_unknown); |
| record_debugformat ("COFF"); |
| } |
| |
| /* Save the vital information from when starting to read a file, |
| for use when closing off the current file. |
| NAME is the file name the symbols came from, START_ADDR is the |
| first text address for the file, and SIZE is the number of bytes of |
| text. */ |
| |
| static void |
| complete_symtab (const char *name, CORE_ADDR start_addr, unsigned int size) |
| { |
| set_last_source_file (name); |
| current_source_start_addr = start_addr; |
| current_source_end_addr = start_addr + size; |
| } |
| |
| /* Finish the symbol definitions for one main source file, close off |
| all the lexical contexts for that file (creating struct block's for |
| them), then make the struct symtab for that file and put it in the |
| list of all such. */ |
| |
| static void |
| coff_end_symtab (struct objfile *objfile) |
| { |
| set_last_source_start_addr (current_source_start_addr); |
| |
| end_symtab (current_source_end_addr, SECT_OFF_TEXT (objfile)); |
| |
| /* Reinitialize for beginning of new file. */ |
| set_last_source_file (NULL); |
| } |
| |
| /* The linker sometimes generates some non-function symbols inside |
| functions referencing variables imported from another DLL. |
| Return nonzero if the given symbol corresponds to one of them. */ |
| |
| static int |
| is_import_fixup_symbol (struct coff_symbol *cs, |
| enum minimal_symbol_type type) |
| { |
| /* The following is a bit of a heuristic using the characteristics |
| of these fixup symbols, but should work well in practice... */ |
| int i; |
| |
| /* Must be a non-static text symbol. */ |
| if (type != mst_text) |
| return 0; |
| |
| /* Must be a non-function symbol. */ |
| if (ISFCN (cs->c_type)) |
| return 0; |
| |
| /* The name must start with "__fu<digits>__". */ |
| if (!startswith (cs->c_name, "__fu")) |
| return 0; |
| if (! isdigit (cs->c_name[4])) |
| return 0; |
| for (i = 5; cs->c_name[i] != '\0' && isdigit (cs->c_name[i]); i++) |
| /* Nothing, just incrementing index past all digits. */; |
| if (cs->c_name[i] != '_' || cs->c_name[i + 1] != '_') |
| return 0; |
| |
| return 1; |
| } |
| |
| static struct minimal_symbol * |
| record_minimal_symbol (minimal_symbol_reader &reader, |
| struct coff_symbol *cs, CORE_ADDR address, |
| enum minimal_symbol_type type, int section, |
| struct objfile *objfile) |
| { |
| /* We don't want TDESC entry points in the minimal symbol table. */ |
| if (cs->c_name[0] == '@') |
| return NULL; |
| |
| if (is_import_fixup_symbol (cs, type)) |
| { |
| /* Because the value of these symbols is within a function code |
| range, these symbols interfere with the symbol-from-address |
| reverse lookup; this manifests itself in backtraces, or any |
| other commands that prints symbolic addresses. Just pretend |
| these symbols do not exist. */ |
| return NULL; |
| } |
| |
| return reader.record_full (cs->c_name, true, address, type, section); |
| } |
| |
| /* coff_symfile_init () |
| is the coff-specific initialization routine for reading symbols. |
| It is passed a struct objfile which contains, among other things, |
| the BFD for the file whose symbols are being read, and a slot for |
| a pointer to "private data" which we fill with cookies and other |
| treats for coff_symfile_read (). |
| |
| We will only be called if this is a COFF or COFF-like file. BFD |
| handles figuring out the format of the file, and code in symtab.c |
| uses BFD's determination to vector to us. |
| |
| The ultimate result is a new symtab (or, FIXME, eventually a |
| psymtab). */ |
| |
| static void |
| coff_symfile_init (struct objfile *objfile) |
| { |
| /* Allocate struct to keep track of the symfile. */ |
| coff_objfile_data_key.emplace (objfile); |
| |
| /* COFF objects may be reordered, so set OBJF_REORDERED. If we |
| find this causes a significant slowdown in gdb then we could |
| set it in the debug symbol readers only when necessary. */ |
| objfile->flags |= OBJF_REORDERED; |
| } |
| |
| /* This function is called for every section; it finds the outer |
| limits of the line table (minimum and maximum file offset) so that |
| the mainline code can read the whole thing for efficiency. */ |
| |
| static void |
| find_linenos (bfd *abfd, struct bfd_section *asect, void *vpinfo) |
| { |
| struct coff_symfile_info *info; |
| int size, count; |
| file_ptr offset, maxoff; |
| |
| /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| count = asect->lineno_count; |
| /* End of warning. */ |
| |
| if (count == 0) |
| return; |
| size = count * local_linesz; |
| |
| info = (struct coff_symfile_info *) vpinfo; |
| /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| offset = asect->line_filepos; |
| /* End of warning. */ |
| |
| if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| info->min_lineno_offset = offset; |
| |
| maxoff = offset + size; |
| if (maxoff > info->max_lineno_offset) |
| info->max_lineno_offset = maxoff; |
| } |
| |
| |
| /* The BFD for this file -- only good while we're actively reading |
| symbols into a psymtab or a symtab. */ |
| |
| static bfd *symfile_bfd; |
| |
| /* Read a symbol file, after initialization by coff_symfile_init. */ |
| |
| static void |
| coff_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
| { |
| struct coff_symfile_info *info; |
| bfd *abfd = objfile->obfd; |
| coff_data_type *cdata = coff_data (abfd); |
| const char *filename = bfd_get_filename (abfd); |
| int val; |
| unsigned int num_symbols; |
| file_ptr symtab_offset; |
| file_ptr stringtab_offset; |
| unsigned int stabstrsize; |
| |
| info = coff_objfile_data_key.get (objfile); |
| symfile_bfd = abfd; /* Kludge for swap routines. */ |
| |
| std::vector<asection *> stabsects; |
| scoped_restore restore_stabsects |
| = make_scoped_restore (&info->stabsects, &stabsects); |
| |
| /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
| symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ |
| stringtab_offset = symtab_offset + /* String table file offset */ |
| num_symbols * cdata->local_symesz; |
| |
| /* Set a few file-statics that give us specific information about |
| the particular COFF file format we're reading. */ |
| local_n_btmask = cdata->local_n_btmask; |
| local_n_btshft = cdata->local_n_btshft; |
| local_n_tmask = cdata->local_n_tmask; |
| local_n_tshift = cdata->local_n_tshift; |
| local_linesz = cdata->local_linesz; |
| local_symesz = cdata->local_symesz; |
| local_auxesz = cdata->local_auxesz; |
| |
| /* Allocate space for raw symbol and aux entries, based on their |
| space requirements as reported by BFD. */ |
| gdb::def_vector<char> temp_storage (cdata->local_symesz |
| + cdata->local_auxesz); |
| temp_sym = temp_storage.data (); |
| temp_aux = temp_sym + cdata->local_symesz; |
| |
| /* We need to know whether this is a PE file, because in PE files, |
| unlike standard COFF files, symbol values are stored as offsets |
| from the section address, rather than as absolute addresses. |
| FIXME: We should use BFD to read the symbol table, and thus avoid |
| this problem. */ |
| pe_file = |
| startswith (bfd_get_target (objfile->obfd), "pe") |
| || startswith (bfd_get_target (objfile->obfd), "epoc-pe"); |
| |
| /* End of warning. */ |
| |
| info->min_lineno_offset = 0; |
| info->max_lineno_offset = 0; |
| |
| /* Only read line number information if we have symbols. |
| |
| On Windows NT, some of the system's DLL's have sections with |
| PointerToLinenumbers fields that are non-zero, but point at |
| random places within the image file. (In the case I found, |
| KERNEL32.DLL's .text section has a line number info pointer that |
| points into the middle of the string `lib\\i386\kernel32.dll'.) |
| |
| However, these DLL's also have no symbols. The line number |
| tables are meaningless without symbols. And in fact, GDB never |
| uses the line number information unless there are symbols. So we |
| can avoid spurious error messages (and maybe run a little |
| faster!) by not even reading the line number table unless we have |
| symbols. */ |
| scoped_restore restore_linetab = make_scoped_restore (&linetab); |
| gdb::unique_xmalloc_ptr<char> linetab_storage; |
| if (num_symbols > 0) |
| { |
| /* Read the line number table, all at once. */ |
| bfd_map_over_sections (abfd, find_linenos, (void *) info); |
| |
| val = init_lineno (abfd, info->min_lineno_offset, |
| info->max_lineno_offset - info->min_lineno_offset, |
| &linetab_storage); |
| if (val < 0) |
| error (_("\"%s\": error reading line numbers."), filename); |
| } |
| |
| /* Now read the string table, all at once. */ |
| |
| scoped_restore restore_stringtab = make_scoped_restore (&stringtab); |
| gdb::unique_xmalloc_ptr<char> stringtab_storage; |
| val = init_stringtab (abfd, stringtab_offset, &stringtab_storage); |
| if (val < 0) |
| error (_("\"%s\": can't get string table"), filename); |
| |
| minimal_symbol_reader reader (objfile); |
| |
| /* Now that the executable file is positioned at symbol table, |
| process it and define symbols accordingly. */ |
| |
| coff_symtab_read (reader, (long) symtab_offset, num_symbols, objfile); |
| |
| /* Install any minimal symbols that have been collected as the |
| current minimal symbols for this objfile. */ |
| |
| reader.install (); |
| |
| if (pe_file) |
| { |
| for (minimal_symbol *msym : objfile->msymbols ()) |
| { |
| const char *name = msym->linkage_name (); |
| |
| /* If the minimal symbols whose name are prefixed by "__imp_" |
| or "_imp_", get rid of the prefix, and search the minimal |
| symbol in OBJFILE. Note that 'maintenance print msymbols' |
| shows that type of these "_imp_XXXX" symbols is mst_data. */ |
| if (MSYMBOL_TYPE (msym) == mst_data) |
| { |
| const char *name1 = NULL; |
| |
| if (startswith (name, "_imp_")) |
| name1 = name + 5; |
| else if (startswith (name, "__imp_")) |
| name1 = name + 6; |
| if (name1 != NULL) |
| { |
| int lead = bfd_get_symbol_leading_char (objfile->obfd); |
| struct bound_minimal_symbol found; |
| |
| if (lead != '\0' && *name1 == lead) |
| name1 += 1; |
| |
| found = lookup_minimal_symbol (name1, NULL, objfile); |
| |
| /* If found, there are symbols named "_imp_foo" and "foo" |
| respectively in OBJFILE. Set the type of symbol "foo" |
| as 'mst_solib_trampoline'. */ |
| if (found.minsym != NULL |
| && MSYMBOL_TYPE (found.minsym) == mst_text) |
| MSYMBOL_TYPE (found.minsym) = mst_solib_trampoline; |
| } |
| } |
| } |
| } |
| |
| if (!(objfile->flags & OBJF_READNEVER)) |
| bfd_map_over_sections (abfd, coff_locate_sections, (void *) info); |
| |
| if (!info->stabsects->empty()) |
| { |
| if (!info->stabstrsect) |
| { |
| error (_("The debugging information in `%s' is corrupted.\nThe " |
| "file has a `.stabs' section, but no `.stabstr' section."), |
| filename); |
| } |
| |
| /* FIXME: dubious. Why can't we use something normal like |
| bfd_get_section_contents? */ |
| bfd_seek (abfd, abfd->where, 0); |
| |
| stabstrsize = bfd_section_size (info->stabstrsect); |
| |
| coffstab_build_psymtabs (objfile, |
| info->textaddr, info->textsize, |
| *info->stabsects, |
| info->stabstrsect->filepos, stabstrsize); |
| } |
| if (dwarf2_has_info (objfile, NULL)) |
| { |
| /* DWARF2 sections. */ |
| dwarf2_build_psymtabs (objfile); |
| } |
| |
| dwarf2_build_frame_info (objfile); |
| |
| /* Try to add separate debug file if no symbols table found. */ |
| if (!objfile->has_partial_symbols ()) |
| { |
| std::string debugfile = find_separate_debug_file_by_buildid (objfile); |
| |
| if (debugfile.empty ()) |
| debugfile = find_separate_debug_file_by_debuglink (objfile); |
| |
| if (!debugfile.empty ()) |
| { |
| gdb_bfd_ref_ptr debug_bfd (symfile_bfd_open (debugfile.c_str ())); |
| |
| symbol_file_add_separate (debug_bfd.get (), debugfile.c_str (), |
| symfile_flags, objfile); |
| } |
| } |
| } |
| |
| static void |
| coff_new_init (struct objfile *ignore) |
| { |
| } |
| |
| /* Perform any local cleanups required when we are done with a |
| particular objfile. I.E, we are in the process of discarding all |
| symbol information for an objfile, freeing up all memory held for |
| it, and unlinking the objfile struct from the global list of known |
| objfiles. */ |
| |
| static void |
| coff_symfile_finish (struct objfile *objfile) |
| { |
| /* Let stabs reader clean up. */ |
| stabsread_clear_cache (); |
| } |
| |
| |
| /* Given pointers to a symbol table in coff style exec file, |
| analyze them and create struct symtab's describing the symbols. |
| NSYMS is the number of symbols in the symbol table. |
| We read them one at a time using read_one_sym (). */ |
| |
| static void |
| coff_symtab_read (minimal_symbol_reader &reader, |
| file_ptr symtab_offset, unsigned int nsyms, |
| struct objfile *objfile) |
| { |
| struct gdbarch *gdbarch = objfile->arch (); |
| struct context_stack *newobj = nullptr; |
| struct coff_symbol coff_symbol; |
| struct coff_symbol *cs = &coff_symbol; |
| static struct internal_syment main_sym; |
| static union internal_auxent main_aux; |
| struct coff_symbol fcn_cs_saved; |
| static struct internal_syment fcn_sym_saved; |
| static union internal_auxent fcn_aux_saved; |
| /* A .file is open. */ |
| int in_source_file = 0; |
| int next_file_symnum = -1; |
| /* Name of the current file. */ |
| const char *filestring = ""; |
| int depth = 0; |
| int fcn_first_line = 0; |
| CORE_ADDR fcn_first_line_addr = 0; |
| int fcn_last_line = 0; |
| int fcn_start_addr = 0; |
| long fcn_line_ptr = 0; |
| int val; |
| CORE_ADDR tmpaddr; |
| struct minimal_symbol *msym; |
| |
| scoped_free_pendings free_pending; |
| |
| /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... |
| it's hard to know I've really worked around it. The fix should |
| be harmless, anyway). The symptom of the bug is that the first |
| fread (in read_one_sym), will (in my example) actually get data |
| from file offset 268, when the fseek was to 264 (and ftell shows |
| 264). This causes all hell to break loose. I was unable to |
| reproduce this on a short test program which operated on the same |
| file, performing (I think) the same sequence of operations. |
| |
| It stopped happening when I put in this (former) rewind(). |
| |
| FIXME: Find out if this has been reported to Sun, whether it has |
| been fixed in a later release, etc. */ |
| |
| bfd_seek (objfile->obfd, 0, 0); |
| |
| /* Position to read the symbol table. */ |
| val = bfd_seek (objfile->obfd, symtab_offset, 0); |
| if (val < 0) |
| perror_with_name (objfile_name (objfile)); |
| |
| coffread_objfile = objfile; |
| nlist_bfd_global = objfile->obfd; |
| nlist_nsyms_global = nsyms; |
| set_last_source_file (NULL); |
| memset (opaque_type_chain, 0, sizeof opaque_type_chain); |
| |
| if (type_vector) /* Get rid of previous one. */ |
| xfree (type_vector); |
| type_vector_length = INITIAL_TYPE_VECTOR_LENGTH; |
| type_vector = XCNEWVEC (struct type *, type_vector_length); |
| |
| coff_start_symtab (objfile, ""); |
| |
| symnum = 0; |
| while (symnum < nsyms) |
| { |
| QUIT; /* Make this command interruptable. */ |
| |
| read_one_sym (cs, &main_sym, &main_aux); |
| |
| if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| { |
| if (get_last_source_file ()) |
| coff_end_symtab (objfile); |
| |
| coff_start_symtab (objfile, "_globals_"); |
| /* coff_start_symtab will set the language of this symtab to |
| language_unknown, since such a ``file name'' is not |
| recognized. Override that with the minimal language to |
| allow printing values in this symtab. */ |
| get_current_subfile ()->language = language_minimal; |
| complete_symtab ("_globals_", 0, 0); |
| /* Done with all files, everything from here on out is |
| globals. */ |
| } |
| |
| /* Special case for file with type declarations only, no |
| text. */ |
| if (!get_last_source_file () && SDB_TYPE (cs->c_type) |
| && cs->c_secnum == N_DEBUG) |
| complete_symtab (filestring, 0, 0); |
| |
| /* Typedefs should not be treated as symbol definitions. */ |
| if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
| { |
| /* Record all functions -- external and static -- in |
| minsyms. */ |
| int section = cs_to_section (cs, objfile); |
| |
| tmpaddr = cs->c_value; |
| /* Don't record unresolved symbols. */ |
| if (!(cs->c_secnum <= 0 && cs->c_value == 0)) |
| record_minimal_symbol (reader, cs, tmpaddr, mst_text, |
| section, objfile); |
| |
| fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| fcn_start_addr = tmpaddr; |
| fcn_cs_saved = *cs; |
| fcn_sym_saved = main_sym; |
| fcn_aux_saved = main_aux; |
| continue; |
| } |
| |
| switch (cs->c_sclass) |
| { |
| case C_EFCN: |
| case C_EXTDEF: |
| case C_ULABEL: |
| case C_USTATIC: |
| case C_LINE: |
| case C_ALIAS: |
| case C_HIDDEN: |
| complaint (_("Bad n_sclass for symbol %s"), |
| cs->c_name); |
| break; |
| |
| case C_FILE: |
| /* c_value field contains symnum of next .file entry in |
| table or symnum of first global after last .file. */ |
| next_file_symnum = cs->c_value; |
| if (cs->c_naux > 0) |
| filestring = coff_getfilename (&main_aux); |
| else |
| filestring = ""; |
| |
| /* Complete symbol table for last object file |
| containing debugging information. */ |
| if (get_last_source_file ()) |
| { |
| coff_end_symtab (objfile); |
| coff_start_symtab (objfile, filestring); |
| } |
| in_source_file = 1; |
| break; |
| |
| /* C_LABEL is used for labels and static functions. |
| Including it here allows gdb to see static functions when |
| no debug info is available. */ |
| case C_LABEL: |
| /* However, labels within a function can make weird |
| backtraces, so filter them out (from phdm@macqel.be). */ |
| if (within_function) |
| break; |
| /* Fall through. */ |
| case C_STAT: |
| case C_THUMBLABEL: |
| case C_THUMBSTAT: |
| case C_THUMBSTATFUNC: |
| if (cs->c_name[0] == '.') |
| { |
| if (strcmp (cs->c_name, ".text") == 0) |
| { |
| /* FIXME: don't wire in ".text" as section name or |
| symbol name! */ |
| /* Check for in_source_file deals with case of a |
| file with debugging symbols followed by a later |
| file with no symbols. */ |
| if (in_source_file) |
| complete_symtab (filestring, |
| (cs->c_value |
| + objfile->text_section_offset ()), |
| main_aux.x_scn.x_scnlen); |
| in_source_file = 0; |
| } |
| /* Flush rest of '.' symbols. */ |
| break; |
| } |
| else if (!SDB_TYPE (cs->c_type) |
| && cs->c_name[0] == 'L' |
| && (startswith (cs->c_name, "LI%") |
| || startswith (cs->c_name, "LF%") |
| || startswith (cs->c_name, "LC%") |
| || startswith (cs->c_name, "LP%") |
| || startswith (cs->c_name, "LPB%") |
| || startswith (cs->c_name, "LBB%") |
| || startswith (cs->c_name, "LBE%") |
| || startswith (cs->c_name, "LPBX%"))) |
| /* At least on a 3b1, gcc generates swbeg and string labels |
| that look like this. Ignore them. */ |
| break; |
| /* For static symbols that don't start with '.'... */ |
| /* Fall through. */ |
| case C_THUMBEXT: |
| case C_THUMBEXTFUNC: |
| case C_EXT: |
| { |
| /* Record it in the minimal symbols regardless of |
| SDB_TYPE. This parallels what we do for other debug |
| formats, and probably is needed to make |
| print_address_symbolic work right without the (now |
| gone) "set fast-symbolic-addr off" kludge. */ |
| |
| enum minimal_symbol_type ms_type; |
| int sec; |
| CORE_ADDR offset = 0; |
| |
| if (cs->c_secnum == N_UNDEF) |
| { |
| /* This is a common symbol. We used to rely on |
| the target to tell us whether it knows where |
| the symbol has been relocated to, but none of |
| the target implementations actually provided |
| that operation. So we just ignore the symbol, |
| the same way we would do if we had a target-side |
| symbol lookup which returned no match. */ |
| break; |
| } |
| else if (cs->c_secnum == N_ABS) |
| { |
| /* Use the correct minimal symbol type (and don't |
| relocate) for absolute values. */ |
| ms_type = mst_abs; |
| sec = cs_to_section (cs, objfile); |
| tmpaddr = cs->c_value; |
| } |
| else |
| { |
| asection *bfd_section = cs_to_bfd_section (cs, objfile); |
| |
| sec = cs_to_section (cs, objfile); |
| tmpaddr = cs->c_value; |
| /* Statics in a PE file also get relocated. */ |
| if (cs->c_sclass == C_EXT |
| || cs->c_sclass == C_THUMBEXTFUNC |
| || cs->c_sclass == C_THUMBEXT |
| || (pe_file && (cs->c_sclass == C_STAT))) |
| offset = objfile->section_offsets[sec]; |
| |
| if (bfd_section->flags & SEC_CODE) |
| { |
| ms_type = |
| cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC |
| || cs->c_sclass == C_THUMBEXT ? |
| mst_text : mst_file_text; |
| tmpaddr = gdbarch_addr_bits_remove (gdbarch, tmpaddr); |
| } |
| else if (bfd_section->flags & SEC_ALLOC |
| && bfd_section->flags & SEC_LOAD) |
| { |
| ms_type = |
| cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| ? mst_data : mst_file_data; |
| } |
| else if (bfd_section->flags & SEC_ALLOC) |
| { |
| ms_type = |
| cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| ? mst_bss : mst_file_bss; |
| } |
| else |
| ms_type = mst_unknown; |
| } |
| |
| msym = record_minimal_symbol (reader, cs, tmpaddr, ms_type, |
| sec, objfile); |
| if (msym) |
| gdbarch_coff_make_msymbol_special (gdbarch, |
| cs->c_sclass, msym); |
| |
| if (SDB_TYPE (cs->c_type)) |
| { |
| struct symbol *sym; |
| |
| sym = process_coff_symbol |
| (cs, &main_aux, objfile); |
| SYMBOL_VALUE (sym) = tmpaddr + offset; |
| sym->set_section_index (sec); |
| } |
| } |
| break; |
| |
| case C_FCN: |
| if (strcmp (cs->c_name, ".bf") == 0) |
| { |
| within_function = 1; |
| |
| /* Value contains address of first non-init type |
| code. */ |
| /* main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| contains line number of '{' }. */ |
| if (cs->c_naux != 1) |
| complaint (_("`.bf' symbol %d has no aux entry"), |
| cs->c_symnum); |
| fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| fcn_first_line_addr = cs->c_value; |
| |
| /* Might want to check that locals are 0 and |
| context_stack_depth is zero, and complain if not. */ |
| |
| depth = 0; |
| newobj = push_context (depth, fcn_start_addr); |
| fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); |
| newobj->name = |
| process_coff_symbol (&fcn_cs_saved, |
| &fcn_aux_saved, objfile); |
| } |
| else if (strcmp (cs->c_name, ".ef") == 0) |
| { |
| if (!within_function) |
| error (_("Bad coff function information.")); |
| /* The value of .ef is the address of epilogue code; |
| not useful for gdb. */ |
| /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| contains number of lines to '}' */ |
| |
| if (outermost_context_p ()) |
| { /* We attempted to pop an empty context stack. */ |
| complaint (_("`.ef' symbol without matching `.bf' " |
| "symbol ignored starting at symnum %d"), |
| cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| |
| struct context_stack cstk = pop_context (); |
| /* Stack must be empty now. */ |
| if (!outermost_context_p () || newobj == NULL) |
| { |
| complaint (_("Unmatched .ef symbol(s) ignored " |
| "starting at symnum %d"), |
| cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| if (cs->c_naux != 1) |
| { |
| complaint (_("`.ef' symbol %d has no aux entry"), |
| cs->c_symnum); |
| fcn_last_line = 0x7FFFFFFF; |
| } |
| else |
| { |
| fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| } |
| /* fcn_first_line is the line number of the opening '{'. |
| Do not record it - because it would affect gdb's idea |
| of the line number of the first statement of the |
| function - except for one-line functions, for which |
| it is also the line number of all the statements and |
| of the closing '}', and for which we do not have any |
| other statement-line-number. */ |
| if (fcn_last_line == 1) |
| record_line (get_current_subfile (), fcn_first_line, |
| gdbarch_addr_bits_remove (gdbarch, |
| fcn_first_line_addr)); |
| else |
| enter_linenos (fcn_line_ptr, fcn_first_line, |
| fcn_last_line, objfile); |
| |
| finish_block (cstk.name, cstk.old_blocks, |
| NULL, cstk.start_addr, |
| fcn_cs_saved.c_value |
| + fcn_aux_saved.x_sym.x_misc.x_fsize |
| + objfile->text_section_offset ()); |
| within_function = 0; |
| } |
| break; |
| |
| case C_BLOCK: |
| if (strcmp (cs->c_name, ".bb") == 0) |
| { |
| tmpaddr = cs->c_value; |
| tmpaddr += objfile->text_section_offset (); |
| push_context (++depth, tmpaddr); |
| } |
| else if (strcmp (cs->c_name, ".eb") == 0) |
| { |
| if (outermost_context_p ()) |
| { /* We attempted to pop an empty context stack. */ |
| complaint (_("`.eb' symbol without matching `.bb' " |
| "symbol ignored starting at symnum %d"), |
| cs->c_symnum); |
| break; |
| } |
| |
| struct context_stack cstk = pop_context (); |
| if (depth-- != cstk.depth) |
| { |
| complaint (_("Mismatched .eb symbol ignored " |
| "starting at symnum %d"), |
| symnum); |
| break; |
| } |
| if (*get_local_symbols () && !outermost_context_p ()) |
| { |
| tmpaddr = cs->c_value + objfile->text_section_offset (); |
| /* Make a block for the local symbols within. */ |
| finish_block (0, cstk.old_blocks, NULL, |
| cstk.start_addr, tmpaddr); |
| } |
| /* Now pop locals of block just finished. */ |
| *get_local_symbols () = cstk.locals; |
| } |
| break; |
| |
| default: |
| process_coff_symbol (cs, &main_aux, objfile); |
| break; |
| } |
| } |
| |
| if ((nsyms == 0) && (pe_file)) |
| { |
| /* We've got no debugging symbols, but it's a portable |
| executable, so try to read the export table. */ |
| read_pe_exported_syms (reader, objfile); |
| } |
| |
| if (get_last_source_file ()) |
| coff_end_symtab (objfile); |
| |
| /* Patch up any opaque types (references to types that are not defined |
| in the file where they are referenced, e.g. "struct foo *bar"). */ |
| { |
| for (compunit_symtab *cu : objfile->compunits ()) |
| { |
| for (symtab *s : compunit_filetabs (cu)) |
| patch_opaque_types (s); |
| } |
| } |
| |
| coffread_objfile = NULL; |
| } |
| |
| /* Routines for reading headers and symbols from executable. */ |
| |
| /* Read the next symbol, swap it, and return it in both |
| internal_syment form, and coff_symbol form. Also return its first |
| auxent, if any, in internal_auxent form, and skip any other |
| auxents. */ |
| |
| static void |
| read_one_sym (struct coff_symbol *cs, |
| struct internal_syment *sym, |
| union internal_auxent *aux) |
| { |
| int i; |
| bfd_size_type bytes; |
| |
| cs->c_symnum = symnum; |
| bytes = bfd_bread (temp_sym, local_symesz, nlist_bfd_global); |
| if (bytes != local_symesz) |
| error (_("%s: error reading symbols"), objfile_name (coffread_objfile)); |
| bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
| cs->c_naux = sym->n_numaux & 0xff; |
| if (cs->c_naux >= 1) |
| { |
| bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
| if (bytes != local_auxesz) |
| error (_("%s: error reading symbols"), objfile_name (coffread_objfile)); |
| bfd_coff_swap_aux_in (symfile_bfd, temp_aux, |
| sym->n_type, sym->n_sclass, |
| 0, cs->c_naux, (char *) aux); |
| /* If more than one aux entry, read past it (only the first aux |
| is important). */ |
| for (i = 1; i < cs->c_naux; i++) |
| { |
| bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
| if (bytes != local_auxesz) |
| error (_("%s: error reading symbols"), |
| objfile_name (coffread_objfile)); |
| } |
| } |
| cs->c_name = getsymname (sym); |
| cs->c_value = sym->n_value; |
| cs->c_sclass = (sym->n_sclass & 0xff); |
| cs->c_secnum = sym->n_scnum; |
| cs->c_type = (unsigned) sym->n_type; |
| if (!SDB_TYPE (cs->c_type)) |
| cs->c_type = 0; |
| |
| #if 0 |
| if (cs->c_sclass & 128) |
| printf (_("thumb symbol %s, class 0x%x\n"), cs->c_name, cs->c_sclass); |
| #endif |
| |
| symnum += 1 + cs->c_naux; |
| |
| /* The PE file format stores symbol values as offsets within the |
| section, rather than as absolute addresses. We correct that |
| here, if the symbol has an appropriate storage class. FIXME: We |
| should use BFD to read the symbols, rather than duplicating the |
| work here. */ |
| if (pe_file) |
| { |
| switch (cs->c_sclass) |
| { |
| case C_EXT: |
| case C_THUMBEXT: |
| case C_THUMBEXTFUNC: |
| case C_SECTION: |
| case C_NT_WEAK: |
| case C_STAT: |
| case C_THUMBSTAT: |
| case C_THUMBSTATFUNC: |
| case C_LABEL: |
| case C_THUMBLABEL: |
| case C_BLOCK: |
| case C_FCN: |
| case C_EFCN: |
| if (cs->c_secnum != 0) |
| cs->c_value += cs_section_address (cs, symfile_bfd); |
| break; |
| } |
| } |
| } |
| |
| /* Support for string table handling. */ |
| |
| static int |
| init_stringtab (bfd *abfd, file_ptr offset, gdb::unique_xmalloc_ptr<char> *storage) |
| { |
| long length; |
| int val; |
| unsigned char lengthbuf[4]; |
| |
| /* If the file is stripped, the offset might be zero, indicating no |
| string table. Just return with `stringtab' set to null. */ |
| if (offset == 0) |
| return 0; |
| |
| if (bfd_seek (abfd, offset, 0) < 0) |
| return -1; |
| |
| val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); |
| length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
| |
| /* If no string table is needed, then the file may end immediately |
| after the symbols. Just return with `stringtab' set to null. */ |
| if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| return 0; |
| |
| storage->reset ((char *) xmalloc (length)); |
| stringtab = storage->get (); |
| /* This is in target format (probably not very useful, and not |
| currently used), not host format. */ |
| memcpy (stringtab, lengthbuf, sizeof lengthbuf); |
| if (length == sizeof length) /* Empty table -- just the count. */ |
| return 0; |
| |
| val = bfd_bread (stringtab + sizeof lengthbuf, |
| length - sizeof lengthbuf, abfd); |
| if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') |
| return -1; |
| |
| return 0; |
| } |
| |
| static char * |
| getsymname (struct internal_syment *symbol_entry) |
| { |
| static char buffer[SYMNMLEN + 1]; |
| char *result; |
| |
| if (symbol_entry->_n._n_n._n_zeroes == 0) |
| { |
| /* FIXME: Probably should be detecting corrupt symbol files by |
| seeing whether offset points to within the stringtab. */ |
| result = stringtab + symbol_entry->_n._n_n._n_offset; |
| } |
| else |
| { |
| strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); |
| buffer[SYMNMLEN] = '\0'; |
| result = buffer; |
| } |
| return result; |
| } |
| |
| /* Extract the file name from the aux entry of a C_FILE symbol. |
| Return only the last component of the name. Result is in static |
| storage and is only good for temporary use. */ |
| |
| static const char * |
| coff_getfilename (union internal_auxent *aux_entry) |
| { |
| static char buffer[BUFSIZ]; |
| const char *result; |
| |
| if (aux_entry->x_file.x_n.x_zeroes == 0) |
| { |
| if (strlen (stringtab + aux_entry->x_file.x_n.x_offset) >= BUFSIZ) |
| internal_error (__FILE__, __LINE__, _("coff file name too long")); |
| strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); |
| } |
| else |
| { |
| strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| buffer[FILNMLEN] = '\0'; |
| } |
| result = buffer; |
| |
| /* FIXME: We should not be throwing away the information about what |
| directory. It should go into dirname of the symtab, or some such |
| place. */ |
| result = lbasename (result); |
| return (result); |
| } |
| |
| /* Support for line number handling. */ |
| |
| /* Read in all the line numbers for fast lookups later. Leave them in |
| external (unswapped) format in memory; we'll swap them as we enter |
| them into GDB's data structures. */ |
| |
| static int |
| init_lineno (bfd *abfd, file_ptr offset, file_ptr size, |
| gdb::unique_xmalloc_ptr<char> *storage) |
| { |
| int val; |
| |
| linetab_offset = offset; |
| linetab_size = size; |
| |
| if (size == 0) |
| return 0; |
| |
| if (bfd_seek (abfd, offset, 0) < 0) |
| return -1; |
| |
| /* Allocate the desired table, plus a sentinel. */ |
| storage->reset ((char *) xmalloc (size + local_linesz)); |
| linetab = storage->get (); |
| |
| val = bfd_bread (storage->get (), size, abfd); |
| if (val != size) |
| return -1; |
| |
| /* Terminate it with an all-zero sentinel record. */ |
| memset (linetab + size, 0, local_linesz); |
| |
| return 0; |
| } |
| |
| #if !defined (L_LNNO32) |
| #define L_LNNO32(lp) ((lp)->l_lnno) |
| #endif |
| |
| static void |
| enter_linenos (file_ptr file_offset, int first_line, |
| int last_line, struct objfile *objfile) |
| { |
| struct gdbarch *gdbarch = objfile->arch (); |
| char *rawptr; |
| struct internal_lineno lptr; |
| |
| if (!linetab) |
| return; |
| if (file_offset < linetab_offset) |
| { |
| complaint (_("Line number pointer %s lower than start of line numbers"), |
| plongest (file_offset)); |
| if (file_offset > linetab_size) /* Too big to be an offset? */ |
| return; |
| file_offset += linetab_offset; /* Try reading at that linetab |
| offset. */ |
| } |
| |
| rawptr = &linetab[file_offset - linetab_offset]; |
| |
| /* Skip first line entry for each function. */ |
| rawptr += local_linesz; |
| /* Line numbers start at one for the first line of the function. */ |
| first_line--; |
| |
| /* If the line number table is full (e.g. 64K lines in COFF debug |
| info), the next function's L_LNNO32 might not be zero, so don't |
| overstep the table's end in any case. */ |
| while (rawptr <= &linetab[0] + linetab_size) |
| { |
| bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); |
| rawptr += local_linesz; |
| /* The next function, or the sentinel, will have L_LNNO32 zero; |
| we exit. */ |
| if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) |
| { |
| CORE_ADDR addr = lptr.l_addr.l_paddr; |
| addr += objfile->text_section_offset (); |
| record_line (get_current_subfile (), |
| first_line + L_LNNO32 (&lptr), |
| gdbarch_addr_bits_remove (gdbarch, addr)); |
| } |
| else |
| break; |
| } |
| } |
| |
| static void |
| patch_type (struct type *type, struct type *real_type) |
| { |
| struct type *target = TYPE_TARGET_TYPE (type); |
| struct type *real_target = TYPE_TARGET_TYPE (real_type); |
| int field_size = real_target->num_fields () * sizeof (struct field); |
| |
| TYPE_LENGTH (target) = TYPE_LENGTH (real_target); |
| target->set_num_fields (real_target->num_fields ()); |
| |
| field *fields = (struct field *) TYPE_ALLOC (target, field_size); |
| memcpy (fields, real_target->fields (), field_size); |
| target->set_fields (fields); |
| |
| if (real_target->name ()) |
| { |
| /* The previous copy of TYPE_NAME is allocated by |
| process_coff_symbol. */ |
| xfree ((char *) target->name ()); |
| target->set_name (xstrdup (real_target->name ())); |
| } |
| } |
| |
| /* Patch up all appropriate typedef symbols in the opaque_type_chains |
| so that they can be used to print out opaque data structures |
| properly. */ |
| |
| static void |
| patch_opaque_types (struct symtab *s) |
| { |
| const struct block *b; |
| struct block_iterator iter; |
| struct symbol *real_sym; |
| |
| /* Go through the per-file symbols only. */ |
| b = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s), STATIC_BLOCK); |
| ALL_BLOCK_SYMBOLS (b, iter, real_sym) |
| { |
| /* Find completed typedefs to use to fix opaque ones. |
| Remove syms from the chain when their types are stored, |
| but search the whole chain, as there may be several syms |
| from different files with the same name. */ |
| if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF |
| && SYMBOL_DOMAIN (real_sym) == VAR_DOMAIN |
| && SYMBOL_TYPE (real_sym)->code () == TYPE_CODE_PTR |
| && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) |
| { |
| const char *name = real_sym->linkage_name (); |
| int hash = hashname (name); |
| struct symbol *sym, *prev; |
| |
| prev = 0; |
| for (sym = opaque_type_chain[hash]; sym;) |
| { |
| if (name[0] == sym->linkage_name ()[0] |
| && strcmp (name + 1, sym->linkage_name () + 1) == 0) |
| { |
| if (prev) |
| { |
| SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); |
| } |
| else |
| { |
| opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); |
| } |
| |
| patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
| |
| if (prev) |
| { |
| sym = SYMBOL_VALUE_CHAIN (prev); |
| } |
| else |
| { |
| sym = opaque_type_chain[hash]; |
| } |
| } |
| else |
| { |
| prev = sym; |
| sym = SYMBOL_VALUE_CHAIN (sym); |
| } |
| } |
| } |
| } |
| } |
| |
| static int |
| coff_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch) |
| { |
| return gdbarch_sdb_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym)); |
| } |
| |
| static const struct symbol_register_ops coff_register_funcs = { |
| coff_reg_to_regnum |
| }; |
| |
| /* The "aclass" index for computed COFF symbols. */ |
| |
| static int coff_register_index; |
| |
| static struct symbol * |
| process_coff_symbol (struct coff_symbol *cs, |
| union internal_auxent *aux, |
| struct objfile *objfile) |
| { |
| struct symbol *sym = new (&objfile->objfile_obstack) symbol; |
| char *name; |
| |
| name = cs->c_name; |
| name = EXTERNAL_NAME (name, objfile->obfd); |
| sym->set_language (get_current_subfile ()->language, |
| &objfile->objfile_obstack); |
| sym->compute_and_set_names (name, true, objfile->per_bfd); |
| |
| /* default assumptions */ |
| SYMBOL_VALUE (sym) = cs->c_value; |
| SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| sym->set_section_index (cs_to_section (cs, objfile)); |
| |
| if (ISFCN (cs->c_type)) |
| { |
| SYMBOL_VALUE (sym) += objfile->text_section_offset (); |
| SYMBOL_TYPE (sym) = |
| lookup_function_type (decode_function_type (cs, cs->c_type, |
| aux, objfile)); |
| |
| SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT |
| || cs->c_sclass == C_THUMBSTATFUNC) |
| add_symbol_to_list (sym, get_file_symbols ()); |
| else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT |
| || cs->c_sclass == C_THUMBEXTFUNC) |
| add_symbol_to_list (sym, get_global_symbols ()); |
| } |
| else |
| { |
| SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux, objfile); |
| switch (cs->c_sclass) |
| { |
| case C_NULL: |
| break; |
| |
| case C_AUTO: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL; |
| add_symbol_to_list (sym, get_local_symbols ()); |
| break; |
| |
| case C_THUMBEXT: |
| case C_THUMBEXTFUNC: |
| case C_EXT: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| SET_SYMBOL_VALUE_ADDRESS (sym, |
| (CORE_ADDR) cs->c_value |
| + objfile->section_offsets[SECT_OFF_TEXT (objfile)]); |
| add_symbol_to_list (sym, get_global_symbols ()); |
| break; |
| |
| case C_THUMBSTAT: |
| case C_THUMBSTATFUNC: |
| case C_STAT: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| SET_SYMBOL_VALUE_ADDRESS (sym, |
| (CORE_ADDR) cs->c_value |
| + objfile->section_offsets[SECT_OFF_TEXT (objfile)]); |
| if (within_function) |
| { |
| /* Static symbol of local scope. */ |
| add_symbol_to_list (sym, get_local_symbols ()); |
| } |
| else |
| { |
| /* Static symbol at top level of file. */ |
| add_symbol_to_list (sym, get_file_symbols ()); |
| } |
| break; |
| |
| #ifdef C_GLBLREG /* AMD coff */ |
| case C_GLBLREG: |
| #endif |
| case C_REG: |
| SYMBOL_ACLASS_INDEX (sym) = coff_register_index; |
| SYMBOL_VALUE (sym) = cs->c_value; |
| add_symbol_to_list (sym, get_local_symbols ()); |
| break; |
| |
| case C_THUMBLABEL: |
| case C_LABEL: |
| break; |
| |
| case C_ARG: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_ARG; |
| SYMBOL_IS_ARGUMENT (sym) = 1; |
| add_symbol_to_list (sym, get_local_symbols ()); |
| break; |
| |
| case C_REGPARM: |
| SYMBOL_ACLASS_INDEX (sym) = coff_register_index; |
| SYMBOL_IS_ARGUMENT (sym) = 1; |
| SYMBOL_VALUE (sym) = cs->c_value; |
| add_symbol_to_list (sym, get_local_symbols ()); |
| break; |
| |
| case C_TPDEF: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| |
| /* If type has no name, give it one. */ |
| if (SYMBOL_TYPE (sym)->name () == 0) |
| { |
| if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_PTR |
| || SYMBOL_TYPE (sym)->code () == TYPE_CODE_FUNC) |
| { |
| /* If we are giving a name to a type such as |
| "pointer to foo" or "function returning foo", we |
| better not set the TYPE_NAME. If the program |
| contains "typedef char *caddr_t;", we don't want |
| all variables of type char * to print as caddr_t. |
| This is not just a consequence of GDB's type |
| management; CC and GCC (at least through version |
| 2.4) both output variables of either type char * |
| or caddr_t with the type refering to the C_TPDEF |
| symbol for caddr_t. If a future compiler cleans |
| this up it GDB is not ready for it yet, but if it |
| becomes ready we somehow need to disable this |
| check (without breaking the PCC/GCC2.4 case). |
| |
| Sigh. |
| |
| Fortunately, this check seems not to be necessary |
| for anything except pointers or functions. */ |
| ; |
| } |
| else |
| SYMBOL_TYPE (sym)->set_name (xstrdup (sym->linkage_name ())); |
| } |
| |
| /* Keep track of any type which points to empty structured |
| type, so it can be filled from a definition from another |
| file. A simple forward reference (TYPE_CODE_UNDEF) is |
| not an empty structured type, though; the forward |
| references work themselves out via the magic of |
| coff_lookup_type. */ |
| if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_PTR |
| && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 |
| && TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))->code () |
| != TYPE_CODE_UNDEF) |
| { |
| int i = hashname (sym->linkage_name ()); |
| |
| SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
| opaque_type_chain[i] = sym; |
| } |
| add_symbol_to_list (sym, get_file_symbols ()); |
| break; |
| |
| case C_STRTAG: |
| case C_UNTAG: |
| case C_ENTAG: |
| SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| |
| /* Some compilers try to be helpful by inventing "fake" |
| names for anonymous enums, structures, and unions, like |
| "~0fake" or ".0fake". Thanks, but no thanks... */ |
| if (SYMBOL_TYPE (sym)->name () == 0) |
| if (sym->linkage_name () != NULL |
| && *sym->linkage_name () != '~' |
| && *sym->linkage_name () != '.') |
| SYMBOL_TYPE (sym)->set_name (xstrdup (sym->linkage_name ())); |
| |
| add_symbol_to_list (sym, get_file_symbols ()); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| return sym; |
| } |
| |
| /* Decode a coff type specifier; return the type that is meant. */ |
| |
| static struct type * |
| decode_type (struct coff_symbol *cs, unsigned int c_type, |
| union internal_auxent *aux, struct objfile *objfile) |
| { |
| struct type *type = 0; |
| unsigned int new_c_type; |
| |
| if (c_type & ~N_BTMASK) |
| { |
| new_c_type = DECREF (c_type); |
| if (ISPTR (c_type)) |
| { |
| type = decode_type (cs, new_c_type, aux, objfile); |
| type = lookup_pointer_type (type); |
| } |
| else if (ISFCN (c_type)) |
| { |
| type = decode_type (cs, new_c_type, aux, objfile); |
| type = lookup_function_type (type); |
| } |
| else if (ISARY (c_type)) |
| { |
| int i, n; |
| unsigned short *dim; |
| struct type *base_type, *index_type, *range_type; |
| |
| /* Define an array type. */ |
| /* auxent refers to array, not base type. */ |
| if (aux->x_sym.x_tagndx.l == 0) |
| cs->c_naux = 0; |
| |
| /* Shift the indices down. */ |
| dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; |
| i = 1; |
| n = dim[0]; |
| for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) |
| *dim = *(dim + 1); |
| *dim = 0; |
| |
| base_type = decode_type (cs, new_c_type, aux, objfile); |
| index_type = objfile_type (objfile)->builtin_int; |
| range_type |
| = create_static_range_type (NULL, index_type, 0, n - 1); |
| type = |
| create_array_type (NULL, base_type, range_type); |
| } |
| return type; |
| } |
| |
| /* Reference to existing type. This only occurs with the struct, |
| union, and enum types. EPI a29k coff fakes us out by producing |
| aux entries with a nonzero x_tagndx for definitions of structs, |
| unions, and enums, so we have to check the c_sclass field. SCO |
| 3.2v4 cc gets confused with pointers to pointers to defined |
| structs, and generates negative x_tagndx fields. */ |
| if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) |
| { |
| if (cs->c_sclass != C_STRTAG |
| && cs->c_sclass != C_UNTAG |
| && cs->c_sclass != C_ENTAG |
| && aux->x_sym.x_tagndx.l >= 0) |
| { |
| type = coff_alloc_type (aux->x_sym.x_tagndx.l); |
| return type; |
| } |
| else |
| { |
| complaint (_("Symbol table entry for %s has bad tagndx value"), |
| cs->c_name); |
| /* And fall through to decode_base_type... */ |
| } |
| } |
| |
| return decode_base_type (cs, BTYPE (c_type), aux, objfile); |
| } |
| |
| /* Decode a coff type specifier for function definition; |
| return the type that the function returns. */ |
| |
| static struct type * |
| decode_function_type (struct coff_symbol *cs, |
| unsigned int c_type, |
| union internal_auxent *aux, |
| struct objfile *objfile) |
| { |
| if (aux->x_sym.x_tagndx.l == 0) |
| cs->c_naux = 0; /* auxent refers to function, not base |
| type. */ |
| |
| return decode_type (cs, DECREF (c_type), aux, objfile); |
| } |
| |
| /* Basic C types. */ |
| |
| static struct type * |
| decode_base_type (struct coff_symbol *cs, |
| unsigned int c_type, |
| union internal_auxent *aux, |
| struct objfile *objfile) |
| { |
| struct gdbarch *gdbarch = objfile->arch (); |
| struct type *type; |
| |
| switch (c_type) |
| { |
| case T_NULL: |
| /* Shows up with "void (*foo)();" structure members. */ |
| return objfile_type (objfile)->builtin_void; |
| |
| #ifdef T_VOID |
| case T_VOID: |
| /* Intel 960 COFF has this symbol and meaning. */ |
| return objfile_type (objfile)->builtin_void; |
| #endif |
| |
| case T_CHAR: |
| return objfile_type (objfile)->builtin_char; |
| |
| case T_SHORT: |
| return objfile_type (objfile)->builtin_short; |
| |
| case T_INT: |
| return objfile_type (objfile)->builtin_int; |
| |
| case T_LONG: |
| if (cs->c_sclass == C_FIELD |
| && aux->x_sym.x_misc.x_lnsz.x_size |
| > gdbarch_long_bit (gdbarch)) |
| return objfile_type (objfile)->builtin_long_long; |
| else |
| return objfile_type (objfile)->builtin_long; |
| |
| case T_FLOAT: |
| return objfile_type (objfile)->builtin_float; |
| |
| case T_DOUBLE: |
| return objfile_type (objfile)->builtin_double; |
| |
| case T_LNGDBL: |
| return objfile_type (objfile)->builtin_long_double; |
| |
| case T_STRUCT: |
| if (cs->c_naux != 1) |
| { |
| /* Anonymous structure type. */ |
| type = coff_alloc_type (cs->c_symnum); |
| type->set_code (TYPE_CODE_STRUCT); |
| type->set_name (NULL); |
| INIT_CPLUS_SPECIFIC (type); |
| TYPE_LENGTH (type) = 0; |
| type->set_fields (nullptr); |
| type->set_num_fields (0); |
| } |
| else |
| { |
| type = coff_read_struct_type (cs->c_symnum, |
| aux->x_sym.x_misc.x_lnsz.x_size, |
| aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| objfile); |
| } |
| return type; |
| |
| case T_UNION: |
| if (cs->c_naux != 1) |
| { |
| /* Anonymous union type. */ |
| type = coff_alloc_type (cs->c_symnum); |
| type->set_name (NULL); |
| INIT_CPLUS_SPECIFIC (type); |
| TYPE_LENGTH (type) = 0; |
| type->set_fields (nullptr); |
| type->set_num_fields (0); |
| } |
| else |
| { |
| type = coff_read_struct_type (cs->c_symnum, |
| aux->x_sym.x_misc.x_lnsz.x_size, |
| aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| objfile); |
| } |
| type->set_code (TYPE_CODE_UNION); |
| return type; |
| |
| case T_ENUM: |
| if (cs->c_naux != 1) |
| { |
| /* Anonymous enum type. */ |
| type = coff_alloc_type (cs->c_symnum); |
| type->set_code (TYPE_CODE_ENUM); |
| type->set_name (NULL); |
| TYPE_LENGTH (type) = 0; |
| type->set_fields (nullptr); |
| type->set_num_fields (0); |
| } |
| else |
| { |
| type = coff_read_enum_type (cs->c_symnum, |
| aux->x_sym.x_misc.x_lnsz.x_size, |
| aux->x_sym.x_fcnary.x_fcn.x_endndx.l, |
| objfile); |
| } |
| return type; |
| |
| case T_MOE: |
| /* Shouldn't show up here. */ |
| break; |
| |
| case T_UCHAR: |
| return objfile_type (objfile)->builtin_unsigned_char; |
| |
| case T_USHORT: |
| return objfile_type (objfile)->builtin_unsigned_short; |
| |
| case T_UINT: |
| return objfile_type (objfile)->builtin_unsigned_int; |
| |
| case T_ULONG: |
| if (cs->c_sclass == C_FIELD |
| && aux->x_sym.x_misc.x_lnsz.x_size |
| > gdbarch_long_bit (gdbarch)) |
| return objfile_type (objfile)->builtin_unsigned_long_long; |
| else |
| return objfile_type (objfile)->builtin_unsigned_long; |
| } |
| complaint (_("Unexpected type for symbol %s"), cs->c_name); |
| return objfile_type (objfile)->builtin_void; |
| } |
| |
| /* This page contains subroutines of read_type. */ |
| |
| /* Read the description of a structure (or union type) and return an |
| object describing the type. */ |
| |
| static struct type * |
| coff_read_struct_type (int index, int length, int lastsym, |
| struct objfile *objfile) |
| { |
| struct nextfield |
| { |
| struct nextfield *next; |
| struct field field; |
| }; |
| |
| struct type *type; |
| struct nextfield *list = 0; |
| struct nextfield *newobj; |
| int nfields = 0; |
| int n; |
| char *name; |
| struct coff_symbol member_sym; |
| struct coff_symbol *ms = &member_sym; |
| struct internal_syment sub_sym; |
| union internal_auxent sub_aux; |
| int done = 0; |
| |
| type = coff_alloc_type (index); |
| type->set_code (TYPE_CODE_STRUCT); |
| INIT_CPLUS_SPECIFIC (type); |
| TYPE_LENGTH (type) = length; |
| |
| while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| { |
| read_one_sym (ms, &sub_sym, &sub_aux); |
| name = ms->c_name; |
| name = EXTERNAL_NAME (name, objfile->obfd); |
| |
| switch (ms->c_sclass) |
| { |
| case C_MOS: |
| case C_MOU: |
| |
| /* Get space to record the next field's data. */ |
| newobj = XALLOCA (struct nextfield); |
| newobj->next = list; |
| list = newobj; |
| |
| /* Save the data. */ |
| list->field.set_name (obstack_strdup (&objfile->objfile_obstack, |
| name)); |
| list->field.set_type (decode_type (ms, ms->c_type, &sub_aux, |
| objfile)); |
| list->field.set_loc_bitpos (8 * ms->c_value); |
| FIELD_BITSIZE (list->field) = 0; |
| nfields++; |
| break; |
| |
| case C_FIELD: |
| |
| /* Get space to record the next field's data. */ |
| newobj = XALLOCA (struct nextfield); |
| newobj->next = list; |
| list = newobj; |
| |
| /* Save the data. */ |
| list->field.set_name (obstack_strdup (&objfile->objfile_obstack, |
| name)); |
| list->field.set_type (decode_type (ms, ms->c_type, &sub_aux, |
| objfile)); |
| list->field.set_loc_bitpos (ms->c_value); |
| FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; |
| nfields++; |
| break; |
| |
| case C_EOS: |
| done = 1; |
| break; |
| } |
| } |
| /* Now create the vector of fields, and record how big it is. */ |
| |
| type->set_num_fields (nfields); |
| type->set_fields |
| ((struct field *) TYPE_ALLOC (type, sizeof (struct field) * nfields)); |
| |
| /* Copy the saved-up fields into the field vector. */ |
| |
| for (n = nfields; list; list = list->next) |
| type->field (--n) = list->field; |
| |
| return type; |
| } |
| |
| /* Read a definition of an enumeration type, |
| and create and return a suitable type object. |
| Also defines the symbols that represent the values of the type. */ |
| |
| static struct type * |
| coff_read_enum_type (int index, int length, int lastsym, |
| struct objfile *objfile) |
| { |
| struct gdbarch *gdbarch = objfile->arch (); |
| struct symbol *sym; |
| struct type *type; |
| int nsyms = 0; |
| int done = 0; |
| struct pending **symlist; |
| struct coff_symbol member_sym; |
| struct coff_symbol *ms = &member_sym; |
| struct internal_syment sub_sym; |
| union internal_auxent sub_aux; |
| struct pending *osyms, *syms; |
| int o_nsyms; |
| int n; |
| char *name; |
| int unsigned_enum = 1; |
| |
| type = coff_alloc_type (index); |
| if (within_function) |
| symlist = get_local_symbols (); |
| else |
| symlist = get_file_symbols (); |
| osyms = *symlist; |
| o_nsyms = osyms ? osyms->nsyms : 0; |
| |
| while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
| { |
| read_one_sym (ms, &sub_sym, &sub_aux); |
| name = ms->c_name; |
| name = EXTERNAL_NAME (name, objfile->obfd); |
| |
| switch (ms->c_sclass) |
| { |
| case C_MOE: |
| sym = new (&objfile->objfile_obstack) symbol; |
| |
| name = obstack_strdup (&objfile->objfile_obstack, name); |
| sym->set_linkage_name (name); |
| SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
| SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| SYMBOL_VALUE (sym) = ms->c_value; |
| add_symbol_to_list (sym, symlist); |
| nsyms++; |
| break; |
| |
| case C_EOS: |
| /* Sometimes the linker (on 386/ix 2.0.2 at least) screws |
| up the count of how many symbols to read. So stop |
| on .eos. */ |
| done = 1; |
| break; |
| } |
| } |
| |
| /* Now fill in the fields of the type-structure. */ |
| |
| if (length > 0) |
| TYPE_LENGTH (type) = length; |
| else /* Assume ints. */ |
| TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; |
| type->set_code (TYPE_CODE_ENUM); |
| type->set_num_fields (nsyms); |
| type->set_fields |
| ((struct field *) TYPE_ALLOC (type, sizeof (struct field) * nsyms)); |
| |
| /* Find the symbols for the values and put them into the type. |
| The symbols can be found in the symlist that we put them on |
| to cause them to be defined. osyms contains the old value |
| of that symlist; everything up to there was defined by us. */ |
| /* Note that we preserve the order of the enum constants, so |
| that in something like "enum {FOO, LAST_THING=FOO}" we print |
| FOO, not LAST_THING. */ |
| |
| for (syms = *symlist, n = 0; syms; syms = syms->next) |
| { |
| int j = 0; |
| |
| if (syms == osyms) |
| j = o_nsyms; |
| for (; j < syms->nsyms; j++, n++) |
| { |
| struct symbol *xsym = syms->symbol[j]; |
| |
| SYMBOL_TYPE (xsym) = type; |
| type->field (n).set_name (xsym->linkage_name ()); |
| type->field (n).set_loc_enumval (SYMBOL_VALUE (xsym)); |
| if (SYMBOL_VALUE (xsym) < 0) |
| unsigned_enum = 0; |
| TYPE_FIELD_BITSIZE (type, n) = 0; |
| } |
| if (syms == osyms) |
| break; |
| } |
| |
| if (unsigned_enum) |
| type->set_is_unsigned (true); |
| |
| return type; |
| } |
| |
| /* Register our ability to parse symbols for coff BFD files. */ |
| |
| static const struct sym_fns coff_sym_fns = |
| { |
| coff_new_init, /* sym_new_init: init anything gbl to |
| entire symtab */ |
| coff_symfile_init, /* sym_init: read initial info, setup |
| for sym_read() */ |
| coff_symfile_read, /* sym_read: read a symbol file into |
| symtab */ |
| coff_symfile_finish, /* sym_finish: finished with file, |
| cleanup */ |
| default_symfile_offsets, /* sym_offsets: xlate external to |
| internal form */ |
| default_symfile_segments, /* sym_segments: Get segment |
| information from a file */ |
| NULL, /* sym_read_linetable */ |
| |
| default_symfile_relocate, /* sym_relocate: Relocate a debug |
| section. */ |
| NULL, /* sym_probe_fns */ |
| }; |
| |
| void _initialize_coffread (); |
| void |
| _initialize_coffread () |
| { |
| add_symtab_fns (bfd_target_coff_flavour, &coff_sym_fns); |
| |
| coff_register_index |
| = register_symbol_register_impl (LOC_REGISTER, &coff_register_funcs); |
| } |