| /* Read apollo DST symbol tables and convert to internal format, for GDB. |
| Contributed by Troy Rollo, University of NSW (troy@cbme.unsw.edu.au). |
| Copyright 1993 Free Software Foundation, Inc. |
| |
| 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "breakpoint.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "obstack.h" |
| |
| #include "gdb_string.h" |
| |
| #include "dst.h" |
| |
| CORE_ADDR cur_src_start_addr, cur_src_end_addr; |
| dst_sec blocks_info, lines_info, symbols_info; |
| |
| /* Vector of line number information. */ |
| |
| static struct linetable *line_vector; |
| |
| /* Index of next entry to go in line_vector_index. */ |
| |
| static int line_vector_index; |
| |
| /* Last line number recorded in the line vector. */ |
| |
| static int prev_line_number; |
| |
| /* Number of elements allocated for line_vector currently. */ |
| |
| static int line_vector_length; |
| |
| static int |
| init_dst_sections PARAMS ((int)); |
| |
| static void |
| read_dst_symtab PARAMS ((struct objfile *)); |
| |
| static void |
| find_dst_sections PARAMS ((bfd *, sec_ptr, PTR)); |
| |
| static void |
| dst_symfile_init PARAMS ((struct objfile *)); |
| |
| static void |
| dst_new_init PARAMS ((struct objfile *)); |
| |
| static void |
| dst_symfile_read PARAMS ((struct objfile *, int)); |
| |
| static void |
| dst_symfile_finish PARAMS ((struct objfile *)); |
| |
| static void |
| dst_end_symtab PARAMS ((struct objfile *)); |
| |
| static void |
| complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); |
| |
| static void |
| dst_start_symtab PARAMS ((void)); |
| |
| static void |
| dst_record_line PARAMS ((int, CORE_ADDR)); |
| |
| /* Manage the vector of line numbers. */ |
| /* FIXME: Use record_line instead. */ |
| |
| static void |
| dst_record_line (line, pc) |
| int line; |
| CORE_ADDR pc; |
| { |
| struct linetable_entry *e; |
| /* Make sure line vector is big enough. */ |
| |
| if (line_vector_index + 2 >= line_vector_length) |
| { |
| line_vector_length *= 2; |
| line_vector = (struct linetable *) |
| xrealloc ((char *) line_vector, sizeof (struct linetable) |
| + (line_vector_length |
| * sizeof (struct linetable_entry))); |
| } |
| |
| e = line_vector->item + line_vector_index++; |
| e->line = line; |
| e->pc = pc; |
| } |
| |
| /* Start a new symtab for a new source file. |
| It indicates the start of data for one original source file. */ |
| /* FIXME: use start_symtab, like coffread.c now does. */ |
| |
| static void |
| dst_start_symtab () |
| { |
| /* Initialize the source file line number information for this file. */ |
| |
| if (line_vector) /* Unlikely, but maybe possible? */ |
| free ((PTR) line_vector); |
| line_vector_index = 0; |
| line_vector_length = 1000; |
| prev_line_number = -2; /* Force first line number to be explicit */ |
| line_vector = (struct linetable *) |
| xmalloc (sizeof (struct linetable) |
| + line_vector_length * sizeof (struct linetable_entry)); |
| } |
| |
| /* 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 (name, start_addr, size) |
| char *name; |
| CORE_ADDR start_addr; |
| unsigned int size; |
| { |
| last_source_file = savestring (name, strlen (name)); |
| cur_src_start_addr = start_addr; |
| cur_src_end_addr = start_addr + size; |
| |
| if (current_objfile->ei.entry_point >= cur_src_start_addr && |
| current_objfile->ei.entry_point < cur_src_end_addr) |
| { |
| current_objfile->ei.entry_file_lowpc = cur_src_start_addr; |
| current_objfile->ei.entry_file_highpc = cur_src_end_addr; |
| } |
| } |
| |
| /* 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. */ |
| /* FIXME: Use end_symtab, like coffread.c now does. */ |
| |
| static void |
| dst_end_symtab (objfile) |
| struct objfile *objfile; |
| { |
| register struct symtab *symtab; |
| register struct blockvector *blockvector; |
| register struct linetable *lv; |
| |
| /* Create the blockvector that points to all the file's blocks. */ |
| |
| blockvector = make_blockvector (objfile); |
| |
| /* Now create the symtab object for this source file. */ |
| symtab = allocate_symtab (last_source_file, objfile); |
| |
| /* Fill in its components. */ |
| symtab->blockvector = blockvector; |
| symtab->free_code = free_linetable; |
| symtab->free_ptr = 0; |
| symtab->filename = last_source_file; |
| symtab->dirname = NULL; |
| symtab->debugformat = obsavestring ("Apollo DST", 10, |
| &objfile->symbol_obstack); |
| lv = line_vector; |
| lv->nitems = line_vector_index; |
| symtab->linetable = (struct linetable *) |
| xrealloc ((char *) lv, (sizeof (struct linetable) |
| + lv->nitems * sizeof (struct linetable_entry))); |
| |
| free_named_symtabs (symtab->filename); |
| |
| /* Reinitialize for beginning of new file. */ |
| line_vector = 0; |
| line_vector_length = -1; |
| last_source_file = NULL; |
| } |
| |
| /* dst_symfile_init () |
| is the dst-specific initialization routine for reading symbols. |
| |
| We will only be called if this is a DST or DST-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 |
| dst_symfile_init (objfile) |
| struct objfile *objfile; |
| { |
| asection *section; |
| bfd *abfd = objfile->obfd; |
| |
| init_entry_point_info (objfile); |
| |
| } |
| |
| /* 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. */ |
| |
| /* ARGSUSED */ |
| static void |
| find_dst_sections (abfd, asect, vpinfo) |
| bfd *abfd; |
| sec_ptr asect; |
| PTR vpinfo; |
| { |
| int size, count; |
| long base; |
| file_ptr offset, maxoff; |
| dst_sec *section; |
| |
| /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| size = asect->_raw_size; |
| offset = asect->filepos; |
| base = asect->vma; |
| /* End of warning */ |
| |
| section = NULL; |
| if (!strcmp (asect->name, ".blocks")) |
| section = &blocks_info; |
| else if (!strcmp (asect->name, ".lines")) |
| section = &lines_info; |
| else if (!strcmp (asect->name, ".symbols")) |
| section = &symbols_info; |
| if (!section) |
| return; |
| section->size = size; |
| section->position = offset; |
| section->base = base; |
| } |
| |
| |
| /* 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 dst_symfile_init. */ |
| /* FIXME! Addr and Mainline are not used yet -- this will not work for |
| shared libraries or add_file! */ |
| |
| /* ARGSUSED */ |
| static void |
| dst_symfile_read (objfile, mainline) |
| struct objfile *objfile; |
| int mainline; |
| { |
| bfd *abfd = objfile->obfd; |
| char *name = bfd_get_filename (abfd); |
| int desc; |
| register int val; |
| int num_symbols; |
| int symtab_offset; |
| int stringtab_offset; |
| |
| symfile_bfd = abfd; /* Kludge for swap routines */ |
| |
| /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| desc = fileno ((FILE *) (abfd->iostream)); /* File descriptor */ |
| |
| /* Read the line number table, all at once. */ |
| bfd_map_over_sections (abfd, find_dst_sections, (PTR) NULL); |
| |
| val = init_dst_sections (desc); |
| if (val < 0) |
| error ("\"%s\": error reading debugging symbol tables\n", name); |
| |
| init_minimal_symbol_collection (); |
| make_cleanup (discard_minimal_symbols, 0); |
| |
| /* Now that the executable file is positioned at symbol table, |
| process it and define symbols accordingly. */ |
| |
| read_dst_symtab (objfile); |
| |
| /* Sort symbols alphabetically within each block. */ |
| |
| { |
| struct symtab *s; |
| for (s = objfile->symtabs; s != NULL; s = s->next) |
| { |
| sort_symtab_syms (s); |
| } |
| } |
| |
| /* Install any minimal symbols that have been collected as the current |
| minimal symbols for this objfile. */ |
| |
| install_minimal_symbols (objfile); |
| } |
| |
| static void |
| dst_new_init (ignore) |
| struct objfile *ignore; |
| { |
| /* Nothin' to do */ |
| } |
| |
| /* 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 |
| dst_symfile_finish (objfile) |
| struct objfile *objfile; |
| { |
| /* Nothing to do */ |
| } |
| |
| |
| /* Get the next line number from the DST. Returns 0 when we hit an |
| * end directive or cannot continue for any other reason. |
| * |
| * Note that ordinary pc deltas are multiplied by two. Apparently |
| * this is what was really intended. |
| */ |
| static int |
| get_dst_line (buffer, pc) |
| signed char **buffer; |
| long *pc; |
| { |
| static last_pc = 0; |
| static long last_line = 0; |
| static int last_file = 0; |
| dst_ln_entry_ptr_t entry; |
| int size; |
| dst_src_loc_t *src_loc; |
| |
| if (*pc != -1) |
| { |
| last_pc = *pc; |
| *pc = -1; |
| } |
| entry = (dst_ln_entry_ptr_t) * buffer; |
| |
| while (dst_ln_ln_delta (*entry) == dst_ln_escape_flag) |
| { |
| switch (entry->esc.esc_code) |
| { |
| case dst_ln_pad: |
| size = 1; /* pad byte */ |
| break; |
| case dst_ln_file: |
| /* file escape. Next 4 bytes are a dst_src_loc_t */ |
| size = 5; |
| src_loc = (dst_src_loc_t *) (*buffer + 1); |
| last_line = src_loc->line_number; |
| last_file = src_loc->file_index; |
| break; |
| case dst_ln_dln1_dpc1: |
| /* 1 byte line delta, 1 byte pc delta */ |
| last_line += (*buffer)[1]; |
| last_pc += 2 * (unsigned char) (*buffer)[2]; |
| dst_record_line (last_line, last_pc); |
| size = 3; |
| break; |
| case dst_ln_dln2_dpc2: |
| /* 2 bytes line delta, 2 bytes pc delta */ |
| last_line += *(short *) (*buffer + 1); |
| last_pc += 2 * (*(short *) (*buffer + 3)); |
| size = 5; |
| dst_record_line (last_line, last_pc); |
| break; |
| case dst_ln_ln4_pc4: |
| /* 4 bytes ABSOLUTE line number, 4 bytes ABSOLUTE pc */ |
| last_line = *(unsigned long *) (*buffer + 1); |
| last_pc = *(unsigned long *) (*buffer + 5); |
| size = 9; |
| dst_record_line (last_line, last_pc); |
| break; |
| case dst_ln_dln1_dpc0: |
| /* 1 byte line delta, pc delta = 0 */ |
| size = 2; |
| last_line += (*buffer)[1]; |
| break; |
| case dst_ln_ln_off_1: |
| /* statement escape, stmt # = 1 (2nd stmt on line) */ |
| size = 1; |
| break; |
| case dst_ln_ln_off: |
| /* statement escape, stmt # = next byte */ |
| size = 2; |
| break; |
| case dst_ln_entry: |
| /* entry escape, next byte is entry number */ |
| size = 2; |
| break; |
| case dst_ln_exit: |
| /* exit escape */ |
| size = 1; |
| break; |
| case dst_ln_stmt_end: |
| /* gap escape, 4 bytes pc delta */ |
| size = 5; |
| /* last_pc += 2 * (*(long *) (*buffer + 1)); */ |
| /* Apparently this isn't supposed to actually modify |
| * the pc value. Totally weird. |
| */ |
| break; |
| case dst_ln_escape_11: |
| case dst_ln_escape_12: |
| case dst_ln_escape_13: |
| size = 1; |
| break; |
| case dst_ln_nxt_byte: |
| /* This shouldn't happen. If it does, we're SOL */ |
| return 0; |
| break; |
| case dst_ln_end: |
| /* end escape, final entry follows */ |
| return 0; |
| } |
| *buffer += (size < 0) ? -size : size; |
| entry = (dst_ln_entry_ptr_t) * buffer; |
| } |
| last_line += dst_ln_ln_delta (*entry); |
| last_pc += entry->delta.pc_delta * 2; |
| (*buffer)++; |
| dst_record_line (last_line, last_pc); |
| return 1; |
| } |
| |
| static void |
| enter_all_lines (buffer, address) |
| char *buffer; |
| long address; |
| { |
| if (buffer) |
| while (get_dst_line (&buffer, &address)); |
| } |
| |
| static int |
| get_dst_entry (buffer, ret_entry) |
| char *buffer; |
| dst_rec_ptr_t *ret_entry; |
| { |
| int size; |
| dst_rec_ptr_t entry; |
| static int last_type; |
| int ar_size; |
| static unsigned lu3; |
| |
| entry = (dst_rec_ptr_t) buffer; |
| switch (entry->rec_type) |
| { |
| case dst_typ_pad: |
| size = 0; |
| break; |
| case dst_typ_comp_unit: |
| size = sizeof (DST_comp_unit (entry)); |
| break; |
| case dst_typ_section_tab: |
| size = sizeof (DST_section_tab (entry)) |
| + ((int) DST_section_tab (entry).number_of_sections |
| - dst_dummy_array_size) * sizeof (long); |
| break; |
| case dst_typ_file_tab: |
| size = sizeof (DST_file_tab (entry)) |
| + ((int) DST_file_tab (entry).number_of_files |
| - dst_dummy_array_size) * sizeof (dst_file_desc_t); |
| break; |
| case dst_typ_block: |
| size = sizeof (DST_block (entry)) |
| + ((int) DST_block (entry).n_of_code_ranges |
| - dst_dummy_array_size) * sizeof (dst_code_range_t); |
| break; |
| case dst_typ_5: |
| size = -1; |
| break; |
| case dst_typ_var: |
| size = sizeof (DST_var (entry)) - |
| sizeof (dst_var_loc_long_t) * dst_dummy_array_size + |
| DST_var (entry).no_of_locs * |
| (DST_var (entry).short_locs ? |
| sizeof (dst_var_loc_short_t) : |
| sizeof (dst_var_loc_long_t)); |
| break; |
| case dst_typ_pointer: |
| size = sizeof (DST_pointer (entry)); |
| break; |
| case dst_typ_array: |
| size = sizeof (DST_array (entry)); |
| break; |
| case dst_typ_subrange: |
| size = sizeof (DST_subrange (entry)); |
| break; |
| case dst_typ_set: |
| size = sizeof (DST_set (entry)); |
| break; |
| case dst_typ_implicit_enum: |
| size = sizeof (DST_implicit_enum (entry)) |
| + ((int) DST_implicit_enum (entry).nelems |
| - dst_dummy_array_size) * sizeof (dst_rel_offset_t); |
| break; |
| case dst_typ_explicit_enum: |
| size = sizeof (DST_explicit_enum (entry)) |
| + ((int) DST_explicit_enum (entry).nelems |
| - dst_dummy_array_size) * sizeof (dst_enum_elem_t); |
| break; |
| case dst_typ_short_rec: |
| size = sizeof (DST_short_rec (entry)) |
| + DST_short_rec (entry).nfields * sizeof (dst_short_field_t) |
| - dst_dummy_array_size * sizeof (dst_field_t); |
| break; |
| case dst_typ_short_union: |
| size = sizeof (DST_short_union (entry)) |
| + DST_short_union (entry).nfields * sizeof (dst_short_field_t) |
| - dst_dummy_array_size * sizeof (dst_field_t); |
| break; |
| case dst_typ_file: |
| size = sizeof (DST_file (entry)); |
| break; |
| case dst_typ_offset: |
| size = sizeof (DST_offset (entry)); |
| break; |
| case dst_typ_alias: |
| size = sizeof (DST_alias (entry)); |
| break; |
| case dst_typ_signature: |
| size = sizeof (DST_signature (entry)) + |
| ((int) DST_signature (entry).nargs - |
| dst_dummy_array_size) * sizeof (dst_arg_t); |
| break; |
| case dst_typ_21: |
| size = -1; |
| break; |
| case dst_typ_old_label: |
| size = sizeof (DST_old_label (entry)); |
| break; |
| case dst_typ_scope: |
| size = sizeof (DST_scope (entry)); |
| break; |
| case dst_typ_end_scope: |
| size = 0; |
| break; |
| case dst_typ_25: |
| case dst_typ_26: |
| size = -1; |
| break; |
| case dst_typ_string_tab: |
| case dst_typ_global_name_tab: |
| size = sizeof (DST_string_tab (entry)) |
| + DST_string_tab (entry).length |
| - dst_dummy_array_size; |
| break; |
| case dst_typ_forward: |
| size = sizeof (DST_forward (entry)); |
| get_dst_entry ((char *) entry + DST_forward (entry).rec_off, &entry); |
| break; |
| case dst_typ_aux_size: |
| size = sizeof (DST_aux_size (entry)); |
| break; |
| case dst_typ_aux_align: |
| size = sizeof (DST_aux_align (entry)); |
| break; |
| case dst_typ_aux_field_size: |
| size = sizeof (DST_aux_field_size (entry)); |
| break; |
| case dst_typ_aux_field_off: |
| size = sizeof (DST_aux_field_off (entry)); |
| break; |
| case dst_typ_aux_field_align: |
| size = sizeof (DST_aux_field_align (entry)); |
| break; |
| case dst_typ_aux_qual: |
| size = sizeof (DST_aux_qual (entry)); |
| break; |
| case dst_typ_aux_var_bound: |
| size = sizeof (DST_aux_var_bound (entry)); |
| break; |
| case dst_typ_extension: |
| size = DST_extension (entry).rec_size; |
| break; |
| case dst_typ_string: |
| size = sizeof (DST_string (entry)); |
| break; |
| case dst_typ_old_entry: |
| size = 48; /* Obsolete entry type */ |
| break; |
| case dst_typ_const: |
| size = sizeof (DST_const (entry)) |
| + DST_const (entry).value.length |
| - sizeof (DST_const (entry).value.val); |
| break; |
| case dst_typ_reference: |
| size = sizeof (DST_reference (entry)); |
| break; |
| case dst_typ_old_record: |
| case dst_typ_old_union: |
| case dst_typ_record: |
| case dst_typ_union: |
| size = sizeof (DST_record (entry)) |
| + ((int) DST_record (entry).nfields |
| - dst_dummy_array_size) * sizeof (dst_field_t); |
| break; |
| case dst_typ_aux_type_deriv: |
| size = sizeof (DST_aux_type_deriv (entry)); |
| break; |
| case dst_typ_locpool: |
| size = sizeof (DST_locpool (entry)) |
| + ((int) DST_locpool (entry).length - |
| dst_dummy_array_size); |
| break; |
| case dst_typ_variable: |
| size = sizeof (DST_variable (entry)); |
| break; |
| case dst_typ_label: |
| size = sizeof (DST_label (entry)); |
| break; |
| case dst_typ_entry: |
| size = sizeof (DST_entry (entry)); |
| break; |
| case dst_typ_aux_lifetime: |
| size = sizeof (DST_aux_lifetime (entry)); |
| break; |
| case dst_typ_aux_ptr_base: |
| size = sizeof (DST_aux_ptr_base (entry)); |
| break; |
| case dst_typ_aux_src_range: |
| size = sizeof (DST_aux_src_range (entry)); |
| break; |
| case dst_typ_aux_reg_val: |
| size = sizeof (DST_aux_reg_val (entry)); |
| break; |
| case dst_typ_aux_unit_names: |
| size = sizeof (DST_aux_unit_names (entry)) |
| + ((int) DST_aux_unit_names (entry).number_of_names |
| - dst_dummy_array_size) * sizeof (dst_rel_offset_t); |
| break; |
| case dst_typ_aux_sect_info: |
| size = sizeof (DST_aux_sect_info (entry)) |
| + ((int) DST_aux_sect_info (entry).number_of_refs |
| - dst_dummy_array_size) * sizeof (dst_sect_ref_t); |
| break; |
| default: |
| size = -1; |
| break; |
| } |
| if (size == -1) |
| { |
| fprintf_unfiltered (gdb_stderr, "Warning: unexpected DST entry type (%d) found\nLast valid entry was of type: %d\n", |
| (int) entry->rec_type, |
| last_type); |
| fprintf_unfiltered (gdb_stderr, "Last unknown_3 value: %d\n", lu3); |
| size = 0; |
| } |
| else |
| last_type = entry->rec_type; |
| if (size & 1) /* Align on a word boundary */ |
| size++; |
| size += 2; |
| *ret_entry = entry; |
| return size; |
| } |
| |
| static int |
| next_dst_entry (buffer, entry, table) |
| char **buffer; |
| dst_rec_ptr_t *entry; |
| dst_sec *table; |
| { |
| if (*buffer - table->buffer >= table->size) |
| { |
| *entry = NULL; |
| return 0; |
| } |
| *buffer += get_dst_entry (*buffer, entry); |
| return 1; |
| } |
| |
| #define NEXT_BLK(a, b) next_dst_entry(a, b, &blocks_info) |
| #define NEXT_SYM(a, b) next_dst_entry(a, b, &symbols_info) |
| #define DST_OFFSET(a, b) ((char *) (a) + (b)) |
| |
| static dst_rec_ptr_t section_table = NULL; |
| |
| char * |
| get_sec_ref (ref) |
| dst_sect_ref_t *ref; |
| { |
| dst_sec *section = NULL; |
| long offset; |
| |
| if (!section_table || !ref->sect_index) |
| return NULL; |
| offset = DST_section_tab (section_table).section_base[ref->sect_index - 1] |
| + ref->sect_offset; |
| if (offset >= blocks_info.base && |
| offset < blocks_info.base + blocks_info.size) |
| section = &blocks_info; |
| else if (offset >= symbols_info.base && |
| offset < symbols_info.base + symbols_info.size) |
| section = &symbols_info; |
| else if (offset >= lines_info.base && |
| offset < lines_info.base + lines_info.size) |
| section = &lines_info; |
| if (!section) |
| return NULL; |
| return section->buffer + (offset - section->base); |
| } |
| |
| CORE_ADDR |
| dst_get_addr (int section, long offset) |
| { |
| if (!section_table || !section) |
| return 0; |
| return DST_section_tab (section_table).section_base[section - 1] + offset; |
| } |
| |
| CORE_ADDR |
| dst_sym_addr (ref) |
| dst_sect_ref_t *ref; |
| { |
| if (!section_table || !ref->sect_index) |
| return 0; |
| return DST_section_tab (section_table).section_base[ref->sect_index - 1] |
| + ref->sect_offset; |
| } |
| |
| static struct type * |
| create_new_type (objfile) |
| struct objfile *objfile; |
| { |
| struct type *type; |
| |
| type = (struct type *) |
| obstack_alloc (&objfile->symbol_obstack, sizeof (struct type)); |
| memset (type, 0, sizeof (struct type)); |
| return type; |
| } |
| |
| static struct symbol * |
| create_new_symbol (objfile, name) |
| struct objfile *objfile; |
| char *name; |
| { |
| struct symbol *sym = (struct symbol *) |
| obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
| memset (sym, 0, sizeof (struct symbol)); |
| SYMBOL_NAME (sym) = obsavestring (name, strlen (name), |
| &objfile->symbol_obstack); |
| SYMBOL_VALUE (sym) = 0; |
| SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| |
| SYMBOL_CLASS (sym) = LOC_BLOCK; |
| return sym; |
| }; |
| |
| static struct type * |
| decode_dst_type PARAMS ((struct objfile *, dst_rec_ptr_t)); |
| |
| static struct type * |
| decode_type_desc (objfile, type_desc, base) |
| struct objfile *objfile; |
| dst_type_t *type_desc; |
| dst_rec_ptr_t base; |
| { |
| struct type *type; |
| dst_rec_ptr_t entry; |
| if (type_desc->std_type.user_defined_type) |
| { |
| entry = (dst_rec_ptr_t) DST_OFFSET (base, |
| dst_user_type_offset (*type_desc)); |
| type = decode_dst_type (objfile, entry); |
| } |
| else |
| { |
| switch (type_desc->std_type.dtc) |
| { |
| case dst_int8_type: |
| type = builtin_type_signed_char; |
| break; |
| case dst_int16_type: |
| type = builtin_type_short; |
| break; |
| case dst_int32_type: |
| type = builtin_type_long; |
| break; |
| case dst_uint8_type: |
| type = builtin_type_unsigned_char; |
| break; |
| case dst_uint16_type: |
| type = builtin_type_unsigned_short; |
| break; |
| case dst_uint32_type: |
| type = builtin_type_unsigned_long; |
| break; |
| case dst_real32_type: |
| type = builtin_type_float; |
| break; |
| case dst_real64_type: |
| type = builtin_type_double; |
| break; |
| case dst_complex_type: |
| type = builtin_type_complex; |
| break; |
| case dst_dcomplex_type: |
| type = builtin_type_double_complex; |
| break; |
| case dst_bool8_type: |
| type = builtin_type_char; |
| break; |
| case dst_bool16_type: |
| type = builtin_type_short; |
| break; |
| case dst_bool32_type: |
| type = builtin_type_long; |
| break; |
| case dst_char_type: |
| type = builtin_type_char; |
| break; |
| /* The next few are more complex. I will take care |
| * of them properly at a later point. |
| */ |
| case dst_string_type: |
| type = builtin_type_void; |
| break; |
| case dst_ptr_type: |
| type = builtin_type_void; |
| break; |
| case dst_set_type: |
| type = builtin_type_void; |
| break; |
| case dst_proc_type: |
| type = builtin_type_void; |
| break; |
| case dst_func_type: |
| type = builtin_type_void; |
| break; |
| /* Back tto some ordinary ones */ |
| case dst_void_type: |
| type = builtin_type_void; |
| break; |
| case dst_uchar_type: |
| type = builtin_type_unsigned_char; |
| break; |
| default: |
| type = builtin_type_void; |
| break; |
| } |
| } |
| return type; |
| } |
| |
| struct structure_list |
| { |
| struct structure_list *next; |
| struct type *type; |
| }; |
| |
| static struct structure_list *struct_list = NULL; |
| |
| static struct type * |
| find_dst_structure (name) |
| char *name; |
| { |
| struct structure_list *element; |
| |
| for (element = struct_list; element; element = element->next) |
| if (!strcmp (name, TYPE_NAME (element->type))) |
| return element->type; |
| return NULL; |
| } |
| |
| |
| static struct type * |
| decode_dst_structure (objfile, entry, code, version) |
| struct objfile *objfile; |
| dst_rec_ptr_t entry; |
| int code; |
| int version; |
| { |
| struct type *type, *child_type; |
| char *struct_name; |
| char *name, *field_name; |
| int i; |
| int fieldoffset, fieldsize; |
| dst_type_t type_desc; |
| struct structure_list *element; |
| |
| struct_name = DST_OFFSET (entry, DST_record (entry).noffset); |
| name = concat ((code == TYPE_CODE_UNION) ? "union " : "struct ", |
| struct_name, NULL); |
| type = find_dst_structure (name); |
| if (type) |
| { |
| free ((PTR) name); |
| return type; |
| } |
| type = create_new_type (objfile); |
| TYPE_NAME (type) = obstack_copy0 (&objfile->symbol_obstack, |
| name, strlen (name)); |
| free ((PTR) name); |
| TYPE_CODE (type) = code; |
| TYPE_LENGTH (type) = DST_record (entry).size; |
| TYPE_NFIELDS (type) = DST_record (entry).nfields; |
| TYPE_FIELDS (type) = (struct field *) |
| obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * |
| DST_record (entry).nfields); |
| fieldoffset = fieldsize = 0; |
| INIT_CPLUS_SPECIFIC (type); |
| element = (struct structure_list *) |
| xmalloc (sizeof (struct structure_list)); |
| element->type = type; |
| element->next = struct_list; |
| struct_list = element; |
| for (i = 0; i < DST_record (entry).nfields; i++) |
| { |
| switch (version) |
| { |
| case 2: |
| field_name = DST_OFFSET (entry, |
| DST_record (entry).f.ofields[i].noffset); |
| fieldoffset = DST_record (entry).f.ofields[i].foffset * 8 + |
| DST_record (entry).f.ofields[i].bit_offset; |
| fieldsize = DST_record (entry).f.ofields[i].size; |
| type_desc = DST_record (entry).f.ofields[i].type_desc; |
| break; |
| case 1: |
| field_name = DST_OFFSET (entry, |
| DST_record (entry).f.fields[i].noffset); |
| type_desc = DST_record (entry).f.fields[i].type_desc; |
| switch (DST_record (entry).f.fields[i].f.field_loc.format_tag) |
| { |
| case dst_field_byte: |
| fieldoffset = DST_record (entry).f. |
| fields[i].f.field_byte.offset * 8; |
| fieldsize = -1; |
| break; |
| case dst_field_bit: |
| fieldoffset = DST_record (entry).f. |
| fields[i].f.field_bit.byte_offset * 8 + |
| DST_record (entry).f. |
| fields[i].f.field_bit.bit_offset; |
| fieldsize = DST_record (entry).f. |
| fields[i].f.field_bit.nbits; |
| break; |
| case dst_field_loc: |
| fieldoffset += fieldsize; |
| fieldsize = -1; |
| break; |
| } |
| break; |
| case 0: |
| field_name = DST_OFFSET (entry, |
| DST_record (entry).f.sfields[i].noffset); |
| fieldoffset = DST_record (entry).f.sfields[i].foffset; |
| type_desc = DST_record (entry).f.sfields[i].type_desc; |
| if (i < DST_record (entry).nfields - 1) |
| fieldsize = DST_record (entry).f.sfields[i + 1].foffset; |
| else |
| fieldsize = DST_record (entry).size; |
| fieldsize -= fieldoffset; |
| fieldoffset *= 8; |
| fieldsize *= 8; |
| } |
| TYPE_FIELDS (type)[i].name = |
| obstack_copy0 (&objfile->symbol_obstack, |
| field_name, strlen (field_name)); |
| TYPE_FIELDS (type)[i].type = decode_type_desc (objfile, |
| &type_desc, |
| entry); |
| if (fieldsize == -1) |
| fieldsize = TYPE_LENGTH (TYPE_FIELDS (type)[i].type) * |
| 8; |
| TYPE_FIELDS (type)[i].bitsize = fieldsize; |
| TYPE_FIELDS (type)[i].bitpos = fieldoffset; |
| } |
| return type; |
| } |
| |
| static struct type * |
| decode_dst_type (objfile, entry) |
| struct objfile *objfile; |
| dst_rec_ptr_t entry; |
| { |
| struct type *child_type, *type, *range_type, *index_type; |
| |
| switch (entry->rec_type) |
| { |
| case dst_typ_var: |
| return decode_type_desc (objfile, |
| &DST_var (entry).type_desc, |
| entry); |
| break; |
| case dst_typ_variable: |
| return decode_type_desc (objfile, |
| &DST_variable (entry).type_desc, |
| entry); |
| break; |
| case dst_typ_short_rec: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 0); |
| case dst_typ_short_union: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 0); |
| case dst_typ_union: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 1); |
| case dst_typ_record: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 1); |
| case dst_typ_old_union: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 2); |
| case dst_typ_old_record: |
| return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 2); |
| case dst_typ_pointer: |
| return make_pointer_type ( |
| decode_type_desc (objfile, |
| &DST_pointer (entry).type_desc, |
| entry), |
| NULL); |
| case dst_typ_array: |
| child_type = decode_type_desc (objfile, |
| &DST_pointer (entry).type_desc, |
| entry); |
| index_type = lookup_fundamental_type (objfile, |
| FT_INTEGER); |
| range_type = create_range_type ((struct type *) NULL, |
| index_type, DST_array (entry).lo_bound, |
| DST_array (entry).hi_bound); |
| return create_array_type ((struct type *) NULL, child_type, |
| range_type); |
| case dst_typ_alias: |
| return decode_type_desc (objfile, |
| &DST_alias (entry).type_desc, |
| entry); |
| default: |
| return builtin_type_int; |
| } |
| } |
| |
| struct symbol_list |
| { |
| struct symbol_list *next; |
| struct symbol *symbol; |
| }; |
| |
| static struct symbol_list *dst_global_symbols = NULL; |
| static int total_globals = 0; |
| |
| static void |
| decode_dst_locstring (locstr, sym) |
| char *locstr; |
| struct symbol *sym; |
| { |
| dst_loc_entry_t *entry, *next_entry; |
| CORE_ADDR temp; |
| int count = 0; |
| |
| while (1) |
| { |
| if (count++ == 100) |
| { |
| fprintf_unfiltered (gdb_stderr, "Error reading locstring\n"); |
| break; |
| } |
| entry = (dst_loc_entry_t *) locstr; |
| next_entry = (dst_loc_entry_t *) (locstr + 1); |
| switch (entry->header.code) |
| { |
| case dst_lsc_end: /* End of string */ |
| return; |
| case dst_lsc_indirect: /* Indirect through previous. Arg == 6 */ |
| /* Or register ax x == arg */ |
| if (entry->header.arg < 6) |
| { |
| SYMBOL_CLASS (sym) = LOC_REGISTER; |
| SYMBOL_VALUE (sym) = entry->header.arg + 8; |
| } |
| /* We predict indirects */ |
| locstr++; |
| break; |
| case dst_lsc_dreg: |
| SYMBOL_CLASS (sym) = LOC_REGISTER; |
| SYMBOL_VALUE (sym) = entry->header.arg; |
| locstr++; |
| break; |
| case dst_lsc_section: /* Section (arg+1) */ |
| SYMBOL_VALUE (sym) = dst_get_addr (entry->header.arg + 1, 0); |
| locstr++; |
| break; |
| case dst_lsc_sec_byte: /* Section (next_byte+1) */ |
| SYMBOL_VALUE (sym) = dst_get_addr (locstr[1] + 1, 0); |
| locstr += 2; |
| break; |
| case dst_lsc_add: /* Add (arg+1)*2 */ |
| case dst_lsc_sub: /* Subtract (arg+1)*2 */ |
| temp = (entry->header.arg + 1) * 2; |
| locstr++; |
| if (*locstr == dst_multiply_256) |
| { |
| temp <<= 8; |
| locstr++; |
| } |
| switch (entry->header.code) |
| { |
| case dst_lsc_add: |
| if (SYMBOL_CLASS (sym) == LOC_LOCAL) |
| SYMBOL_CLASS (sym) = LOC_ARG; |
| SYMBOL_VALUE (sym) += temp; |
| break; |
| case dst_lsc_sub: |
| SYMBOL_VALUE (sym) -= temp; |
| break; |
| } |
| break; |
| case dst_lsc_add_byte: |
| case dst_lsc_sub_byte: |
| switch (entry->header.arg & 0x03) |
| { |
| case 1: |
| temp = (unsigned char) locstr[1]; |
| locstr += 2; |
| break; |
| case 2: |
| temp = *(unsigned short *) (locstr + 1); |
| locstr += 3; |
| break; |
| case 3: |
| temp = *(unsigned long *) (locstr + 1); |
| locstr += 5; |
| break; |
| } |
| if (*locstr == dst_multiply_256) |
| { |
| temp <<= 8; |
| locstr++; |
| } |
| switch (entry->header.code) |
| { |
| case dst_lsc_add_byte: |
| if (SYMBOL_CLASS (sym) == LOC_LOCAL) |
| SYMBOL_CLASS (sym) = LOC_ARG; |
| SYMBOL_VALUE (sym) += temp; |
| break; |
| case dst_lsc_sub_byte: |
| SYMBOL_VALUE (sym) -= temp; |
| break; |
| } |
| break; |
| case dst_lsc_sbreg: /* Stack base register (frame pointer). Arg==0 */ |
| if (next_entry->header.code != dst_lsc_indirect) |
| { |
| SYMBOL_VALUE (sym) = 0; |
| SYMBOL_CLASS (sym) = LOC_STATIC; |
| return; |
| } |
| SYMBOL_VALUE (sym) = 0; |
| SYMBOL_CLASS (sym) = LOC_LOCAL; |
| locstr++; |
| break; |
| default: |
| SYMBOL_VALUE (sym) = 0; |
| SYMBOL_CLASS (sym) = LOC_STATIC; |
| return; |
| } |
| } |
| } |
| |
| static struct symbol_list * |
| process_dst_symbols (objfile, entry, name, nsyms_ret) |
| struct objfile *objfile; |
| dst_rec_ptr_t entry; |
| char *name; |
| int *nsyms_ret; |
| { |
| struct symbol_list *list = NULL, *element; |
| struct symbol *sym; |
| char *symname; |
| int nsyms = 0; |
| char *location; |
| long line; |
| dst_type_t symtype; |
| struct type *type; |
| dst_var_attr_t attr; |
| dst_var_loc_t loc_type; |
| unsigned loc_index; |
| long loc_value; |
| |
| if (!entry) |
| { |
| *nsyms_ret = 0; |
| return NULL; |
| } |
| location = (char *) entry; |
| while (NEXT_SYM (&location, &entry) && |
| entry->rec_type != dst_typ_end_scope) |
| { |
| if (entry->rec_type == dst_typ_var) |
| { |
| if (DST_var (entry).short_locs) |
| { |
| loc_type = DST_var (entry).locs.shorts[0].loc_type; |
| loc_index = DST_var (entry).locs.shorts[0].loc_index; |
| loc_value = DST_var (entry).locs.shorts[0].location; |
| } |
| else |
| { |
| loc_type = DST_var (entry).locs.longs[0].loc_type; |
| loc_index = DST_var (entry).locs.longs[0].loc_index; |
| loc_value = DST_var (entry).locs.longs[0].location; |
| } |
| if (loc_type == dst_var_loc_external) |
| continue; |
| symname = DST_OFFSET (entry, DST_var (entry).noffset); |
| line = DST_var (entry).src_loc.line_number; |
| symtype = DST_var (entry).type_desc; |
| attr = DST_var (entry).attributes; |
| } |
| else if (entry->rec_type == dst_typ_variable) |
| { |
| symname = DST_OFFSET (entry, |
| DST_variable (entry).noffset); |
| line = DST_variable (entry).src_loc.line_number; |
| symtype = DST_variable (entry).type_desc; |
| attr = DST_variable (entry).attributes; |
| } |
| else |
| { |
| continue; |
| } |
| if (symname && name && !strcmp (symname, name)) |
| /* It's the function return value */ |
| continue; |
| sym = create_new_symbol (objfile, symname); |
| |
| if ((attr & (1 << dst_var_attr_global)) || |
| (attr & (1 << dst_var_attr_static))) |
| SYMBOL_CLASS (sym) = LOC_STATIC; |
| else |
| SYMBOL_CLASS (sym) = LOC_LOCAL; |
| SYMBOL_LINE (sym) = line; |
| SYMBOL_TYPE (sym) = decode_type_desc (objfile, &symtype, |
| entry); |
| SYMBOL_VALUE (sym) = 0; |
| switch (entry->rec_type) |
| { |
| case dst_typ_var: |
| switch (loc_type) |
| { |
| case dst_var_loc_abs: |
| SYMBOL_VALUE_ADDRESS (sym) = loc_value; |
| break; |
| case dst_var_loc_sect_off: |
| case dst_var_loc_ind_sect_off: /* What is this? */ |
| SYMBOL_VALUE_ADDRESS (sym) = dst_get_addr ( |
| loc_index, |
| loc_value); |
| break; |
| case dst_var_loc_ind_reg_rel: /* What is this? */ |
| case dst_var_loc_reg_rel: |
| /* If it isn't fp relative, specify the |
| * register it's relative to. |
| */ |
| if (loc_index) |
| { |
| sym->aux_value.basereg = loc_index; |
| } |
| SYMBOL_VALUE (sym) = loc_value; |
| if (loc_value > 0 && |
| SYMBOL_CLASS (sym) == LOC_BASEREG) |
| SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; |
| break; |
| case dst_var_loc_reg: |
| SYMBOL_VALUE (sym) = loc_index; |
| SYMBOL_CLASS (sym) = LOC_REGISTER; |
| break; |
| } |
| break; |
| case dst_typ_variable: |
| /* External variable..... don't try to interpret |
| * its nonexistant locstring. |
| */ |
| if (DST_variable (entry).loffset == -1) |
| continue; |
| decode_dst_locstring (DST_OFFSET (entry, |
| DST_variable (entry).loffset), |
| sym); |
| } |
| element = (struct symbol_list *) |
| xmalloc (sizeof (struct symbol_list)); |
| |
| if (attr & (1 << dst_var_attr_global)) |
| { |
| element->next = dst_global_symbols; |
| dst_global_symbols = element; |
| total_globals++; |
| } |
| else |
| { |
| element->next = list; |
| list = element; |
| nsyms++; |
| } |
| element->symbol = sym; |
| } |
| *nsyms_ret = nsyms; |
| return list; |
| } |
| |
| |
| static struct symbol * |
| process_dst_function (objfile, entry, name, address) |
| struct objfile *objfile; |
| dst_rec_ptr_t entry; |
| char *name; |
| CORE_ADDR address; |
| { |
| struct symbol *sym; |
| struct type *type, *ftype; |
| dst_rec_ptr_t sym_entry, typ_entry; |
| char *location; |
| struct symbol_list *element; |
| |
| type = builtin_type_int; |
| sym = create_new_symbol (objfile, name); |
| SYMBOL_CLASS (sym) = LOC_BLOCK; |
| |
| if (entry) |
| { |
| location = (char *) entry; |
| do |
| { |
| NEXT_SYM (&location, &sym_entry); |
| } |
| while (sym_entry && sym_entry->rec_type != dst_typ_signature); |
| |
| if (sym_entry) |
| { |
| SYMBOL_LINE (sym) = |
| DST_signature (sym_entry).src_loc.line_number; |
| if (DST_signature (sym_entry).result) |
| { |
| typ_entry = (dst_rec_ptr_t) |
| DST_OFFSET (sym_entry, |
| DST_signature (sym_entry).result); |
| type = decode_dst_type (objfile, typ_entry); |
| } |
| } |
| } |
| |
| if (!type->function_type) |
| { |
| ftype = create_new_type (objfile); |
| type->function_type = ftype; |
| ftype->target_type = type; |
| ftype->code = TYPE_CODE_FUNC; |
| } |
| SYMBOL_TYPE (sym) = type->function_type; |
| |
| /* Now add ourselves to the global symbols list */ |
| element = (struct symbol_list *) |
| xmalloc (sizeof (struct symbol_list)); |
| |
| element->next = dst_global_symbols; |
| dst_global_symbols = element; |
| total_globals++; |
| element->symbol = sym; |
| |
| return sym; |
| } |
| |
| static struct block * |
| process_dst_block (objfile, entry) |
| struct objfile *objfile; |
| dst_rec_ptr_t entry; |
| { |
| struct block *block; |
| struct symbol *function = NULL; |
| CORE_ADDR address; |
| long size; |
| char *name; |
| dst_rec_ptr_t child_entry, symbol_entry; |
| struct block *child_block; |
| int total_symbols = 0; |
| char fake_name[20]; |
| static long fake_seq = 0; |
| struct symbol_list *symlist, *nextsym; |
| int symnum; |
| |
| if (DST_block (entry).noffset) |
| name = DST_OFFSET (entry, DST_block (entry).noffset); |
| else |
| name = NULL; |
| if (DST_block (entry).n_of_code_ranges) |
| { |
| address = dst_sym_addr ( |
| &DST_block (entry).code_ranges[0].code_start); |
| size = DST_block (entry).code_ranges[0].code_size; |
| } |
| else |
| { |
| address = -1; |
| size = 0; |
| } |
| symbol_entry = (dst_rec_ptr_t) get_sec_ref (&DST_block (entry).symbols_start); |
| switch (DST_block (entry).block_type) |
| { |
| /* These are all really functions. Even the "program" type. |
| * This is because the Apollo OS was written in Pascal, and |
| * in Pascal, the main procedure is described as the Program. |
| * Cute, huh? |
| */ |
| case dst_block_procedure: |
| case dst_block_function: |
| case dst_block_subroutine: |
| case dst_block_program: |
| prim_record_minimal_symbol (name, address, mst_text, objfile); |
| function = process_dst_function ( |
| objfile, |
| symbol_entry, |
| name, |
| address); |
| enter_all_lines (get_sec_ref (&DST_block (entry).code_ranges[0].lines_start), address); |
| break; |
| case dst_block_block_data: |
| break; |
| |
| default: |
| /* GDB has to call it something, and the module name |
| * won't cut it |
| */ |
| sprintf (fake_name, "block_%08lx", fake_seq++); |
| function = process_dst_function ( |
| objfile, NULL, fake_name, address); |
| break; |
| } |
| symlist = process_dst_symbols (objfile, symbol_entry, |
| name, &total_symbols); |
| block = (struct block *) |
| obstack_alloc (&objfile->symbol_obstack, |
| sizeof (struct block) + |
| (total_symbols - 1) * sizeof (struct symbol *)); |
| |
| symnum = 0; |
| while (symlist) |
| { |
| nextsym = symlist->next; |
| |
| block->sym[symnum] = symlist->symbol; |
| |
| free ((PTR) symlist); |
| symlist = nextsym; |
| symnum++; |
| } |
| BLOCK_NSYMS (block) = total_symbols; |
| BLOCK_START (block) = address; |
| BLOCK_END (block) = address + size; |
| BLOCK_SUPERBLOCK (block) = 0; |
| if (function) |
| { |
| SYMBOL_BLOCK_VALUE (function) = block; |
| BLOCK_FUNCTION (block) = function; |
| } |
| else |
| BLOCK_FUNCTION (block) = 0; |
| |
| if (DST_block (entry).child_block_off) |
| { |
| child_entry = (dst_rec_ptr_t) DST_OFFSET (entry, |
| DST_block (entry).child_block_off); |
| while (child_entry) |
| { |
| child_block = process_dst_block (objfile, child_entry); |
| if (child_block) |
| { |
| if (BLOCK_START (child_block) < |
| BLOCK_START (block) || |
| BLOCK_START (block) == -1) |
| BLOCK_START (block) = |
| BLOCK_START (child_block); |
| if (BLOCK_END (child_block) > |
| BLOCK_END (block) || |
| BLOCK_END (block) == -1) |
| BLOCK_END (block) = |
| BLOCK_END (child_block); |
| BLOCK_SUPERBLOCK (child_block) = block; |
| } |
| if (DST_block (child_entry).sibling_block_off) |
| child_entry = (dst_rec_ptr_t) DST_OFFSET ( |
| child_entry, |
| DST_block (child_entry).sibling_block_off); |
| else |
| child_entry = NULL; |
| } |
| } |
| record_pending_block (objfile, block, NULL); |
| return block; |
| } |
| |
| |
| static void |
| read_dst_symtab (objfile) |
| struct objfile *objfile; |
| { |
| char *buffer; |
| dst_rec_ptr_t entry, file_table, root_block; |
| char *source_file; |
| struct block *block, *global_block; |
| int symnum; |
| struct symbol_list *nextsym; |
| int module_num = 0; |
| struct structure_list *element; |
| |
| current_objfile = objfile; |
| buffer = blocks_info.buffer; |
| while (NEXT_BLK (&buffer, &entry)) |
| { |
| if (entry->rec_type == dst_typ_comp_unit) |
| { |
| file_table = (dst_rec_ptr_t) DST_OFFSET (entry, |
| DST_comp_unit (entry).file_table); |
| section_table = (dst_rec_ptr_t) DST_OFFSET (entry, |
| DST_comp_unit (entry).section_table); |
| root_block = (dst_rec_ptr_t) DST_OFFSET (entry, |
| DST_comp_unit (entry).root_block_offset); |
| source_file = DST_OFFSET (file_table, |
| DST_file_tab (file_table).files[0].noffset); |
| /* Point buffer to the start of the next comp_unit */ |
| buffer = DST_OFFSET (entry, |
| DST_comp_unit (entry).data_size); |
| dst_start_symtab (); |
| |
| block = process_dst_block (objfile, root_block); |
| |
| global_block = (struct block *) |
| obstack_alloc (&objfile->symbol_obstack, |
| sizeof (struct block) + |
| (total_globals - 1) * |
| sizeof (struct symbol *)); |
| BLOCK_NSYMS (global_block) = total_globals; |
| for (symnum = 0; symnum < total_globals; symnum++) |
| { |
| nextsym = dst_global_symbols->next; |
| |
| global_block->sym[symnum] = |
| dst_global_symbols->symbol; |
| |
| free ((PTR) dst_global_symbols); |
| dst_global_symbols = nextsym; |
| } |
| dst_global_symbols = NULL; |
| total_globals = 0; |
| BLOCK_FUNCTION (global_block) = 0; |
| BLOCK_START (global_block) = BLOCK_START (block); |
| BLOCK_END (global_block) = BLOCK_END (block); |
| BLOCK_SUPERBLOCK (global_block) = 0; |
| BLOCK_SUPERBLOCK (block) = global_block; |
| record_pending_block (objfile, global_block, NULL); |
| |
| complete_symtab (source_file, |
| BLOCK_START (block), |
| BLOCK_END (block) - BLOCK_START (block)); |
| module_num++; |
| dst_end_symtab (objfile); |
| } |
| } |
| if (module_num) |
| prim_record_minimal_symbol ("<end_of_program>", |
| BLOCK_END (block), mst_text, objfile); |
| /* One more faked symbol to make sure nothing can ever run off the |
| * end of the symbol table. This one represents the end of the |
| * text space. It used to be (CORE_ADDR) -1 (effectively the highest |
| * int possible), but some parts of gdb treated it as a signed |
| * number and failed comparisons. We could equally use 7fffffff, |
| * but no functions are ever mapped to an address higher than |
| * 40000000 |
| */ |
| prim_record_minimal_symbol ("<end_of_text>", |
| (CORE_ADDR) 0x40000000, |
| mst_text, objfile); |
| while (struct_list) |
| { |
| element = struct_list; |
| struct_list = element->next; |
| free ((PTR) element); |
| } |
| } |
| |
| |
| /* Support for line number handling */ |
| static char *linetab = NULL; |
| static long linetab_offset; |
| static unsigned long linetab_size; |
| |
| /* 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_one_section (chan, secinfo) |
| int chan; |
| dst_sec *secinfo; |
| { |
| if (secinfo->size == 0 |
| || lseek (chan, secinfo->position, 0) == -1 |
| || (secinfo->buffer = xmalloc (secinfo->size)) == NULL |
| || myread (chan, secinfo->buffer, secinfo->size) == -1) |
| return 0; |
| else |
| return 1; |
| } |
| |
| static int |
| init_dst_sections (chan) |
| int chan; |
| { |
| |
| if (!init_one_section (chan, &blocks_info) || |
| !init_one_section (chan, &lines_info) || |
| !init_one_section (chan, &symbols_info)) |
| return -1; |
| else |
| return 0; |
| } |
| |
| /* Fake up support for relocating symbol addresses. FIXME. */ |
| |
| struct section_offsets dst_symfile_faker = |
| {0}; |
| |
| void |
| dst_symfile_offsets (objfile, addr) |
| struct objfile *objfile; |
| struct section_addr_info *addrs; |
| { |
| objfile->num_sections = 1; |
| objfile->section_offsets = &dst_symfile_faker; |
| } |
| |
| /* Register our ability to parse symbols for DST BFD files */ |
| |
| static struct sym_fns dst_sym_fns = |
| { |
| /* FIXME: Can this be integrated with coffread.c? If not, should it be |
| a separate flavour like ecoff? */ |
| (enum bfd_flavour) -2, |
| |
| dst_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| dst_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| dst_symfile_read, /* sym_read: read a symbol file into symtab */ |
| dst_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| dst_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_dstread () |
| { |
| add_symtab_fns (&dst_sym_fns); |
| } |