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authorJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
committerJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
commit831c851165e112139af1265f294e198401814c1f (patch)
tree5f155fecb9b690be9c428e822d519c2710fefd47 /gdb/coffread.c
parent7a67dd45ca1c191a0220697a3ec9fa92993caf8c (diff)
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Initial revision
Diffstat (limited to 'gdb/coffread.c')
-rw-r--r--gdb/coffread.c2018
1 files changed, 0 insertions, 2018 deletions
diff --git a/gdb/coffread.c b/gdb/coffread.c
deleted file mode 100644
index a657cf3..0000000
--- a/gdb/coffread.c
+++ /dev/null
@@ -1,2018 +0,0 @@
-/* Read coff symbol tables and convert to internal format, for GDB.
- Design and support routines derived from dbxread.c, and UMAX COFF
- specific routines written 9/1/87 by David D. Johnson, Brown University.
- Revised 11/27/87 ddj@cs.brown.edu
- Copyright (C) 1987, 1988, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB 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 1, or (at your option)
-any later version.
-
-GDB 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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <stdio.h>
-#include "defs.h"
-#include "param.h"
-#ifdef COFF_FORMAT
-#include "symtab.h"
-
-#ifdef USG
-#include <sys/types.h>
-#include <fcntl.h>
-#endif
-
-#include <a.out.h>
-#include <obstack.h>
-#include <sys/param.h>
-#include <sys/file.h>
-
-static void add_symbol_to_list ();
-static void read_coff_symtab ();
-static void patch_opaque_types ();
-static struct type *decode_function_type ();
-static struct type *decode_type ();
-static struct type *decode_base_type ();
-static struct type *read_enum_type ();
-static struct type *read_struct_type ();
-static void finish_block ();
-static struct blockvector *make_blockvector ();
-static struct symbol *process_coff_symbol ();
-static int init_stringtab ();
-static void free_stringtab ();
-static char *getfilename ();
-static char *getsymname ();
-static int init_lineno ();
-static void enter_linenos ();
-
-extern int fclose ();
-extern void free_all_symtabs ();
-extern void free_all_psymtabs ();
-
-
-/* Name of source file whose symbol data we are now processing.
- This comes from a symbol named ".file". */
-
-static char *last_source_file;
-
-/* 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 cur_src_start_addr;
-static CORE_ADDR cur_src_end_addr;
-
-/* Core address of the end of the first object file. */
-static CORE_ADDR first_object_file_end;
-
-/* End of the text segment of the executable file,
- as found in the symbol _etext. */
-
-static CORE_ADDR end_of_text_addr;
-
-/* The addresses of the symbol table stream and number of symbols
- of the object file we are reading (as copied into core). */
-
-static FILE *nlist_stream_global;
-static int nlist_nsyms_global;
-
-/* The file, a.out and text section headers of the symbol file */
-
-static FILHDR file_hdr;
-static SCNHDR text_hdr;
-static AOUTHDR aout_hdr;
-
-/* The index in the symbol table of the last coff symbol that was processed. */
-
-static int symnum;
-
-/* Vector of types defined so far, indexed by their coff symnum. */
-
-static struct typevector *type_vector;
-
-/* Number of elements allocated for type_vector currently. */
-
-static int type_vector_length;
-
-/* 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;
-
-/* Chain of typedefs of pointers to empty struct/union types.
- They are chained thru the SYMBOL_VALUE. */
-
-#define HASHSIZE 127
-static struct symbol *opaque_type_chain[HASHSIZE];
-
-/* Record the symbols defined for each context in a list.
- We don't create a struct block for the context until we
- know how long to make it. */
-
-struct pending
-{
- struct pending *next;
- struct symbol *symbol;
-};
-
-/* Here are the three lists that symbols are put on. */
-
-struct pending *file_symbols; /* static at top level, and types */
-
-struct pending *global_symbols; /* global functions and variables */
-
-struct pending *local_symbols; /* everything local to lexical context */
-
-/* List of unclosed lexical contexts
- (that will become blocks, eventually). */
-
-struct context_stack
-{
- struct context_stack *next;
- struct pending *locals;
- struct pending_block *old_blocks;
- struct symbol *name;
- CORE_ADDR start_addr;
- int depth;
-};
-
-struct context_stack *context_stack;
-
-/* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
-
-int within_function;
-
-/* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
-
-struct pending_block
-{
- struct pending_block *next;
- struct block *block;
-};
-
-struct pending_block *pending_blocks;
-
-extern CORE_ADDR startup_file_start; /* From blockframe.c */
-extern CORE_ADDR startup_file_end; /* From blockframe.c */
-
-/* File name symbols were loaded from. */
-
-static char *symfile;
-
-/* 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 (index)
- register int index;
-{
- if (index >= type_vector_length)
- {
- int old_vector_length = type_vector_length;
-
- type_vector_length *= 2;
- if (type_vector_length < index) {
- type_vector_length = index * 2;
- }
- type_vector = (struct typevector *)
- xrealloc (type_vector, sizeof (struct typevector)
- + type_vector_length * sizeof (struct type *));
- bzero (&type_vector->type[ old_vector_length ],
- (type_vector_length - old_vector_length) * sizeof(struct type *));
- }
- return &type_vector->type[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 (index)
- int index;
-{
- register struct type **type_addr = coff_lookup_type (index);
- register 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 == 0)
- {
- type = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
- bzero (type, sizeof (struct type));
- *type_addr = type;
- }
- return type;
-}
-
-/* maintain the lists of symbols and blocks */
-
-/* Add a symbol to one of the lists of symbols. */
-static void
-add_symbol_to_list (symbol, listhead)
- struct symbol *symbol;
- struct pending **listhead;
-{
- register struct pending *link
- = (struct pending *) xmalloc (sizeof (struct pending));
-
- link->next = *listhead;
- link->symbol = symbol;
- *listhead = link;
-}
-
-/* Take one of the lists of symbols and make a block from it.
- Put the block on the list of pending blocks. */
-
-static void
-finish_block (symbol, listhead, old_blocks, start, end)
- struct symbol *symbol;
- struct pending **listhead;
- struct pending_block *old_blocks;
- CORE_ADDR start, end;
-{
- register struct pending *next, *next1;
- register struct block *block;
- register struct pending_block *pblock;
- struct pending_block *opblock;
- register int i;
-
- /* Count the length of the list of symbols. */
-
- for (next = *listhead, i = 0; next; next = next->next, i++);
-
- block = (struct block *)
- obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *));
-
- /* Copy the symbols into the block. */
-
- BLOCK_NSYMS (block) = i;
- for (next = *listhead; next; next = next->next)
- BLOCK_SYM (block, --i) = next->symbol;
-
- BLOCK_START (block) = start;
- BLOCK_END (block) = end;
- BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */
-
- /* Put the block in as the value of the symbol that names it. */
-
- if (symbol)
- {
- SYMBOL_BLOCK_VALUE (symbol) = block;
- BLOCK_FUNCTION (block) = symbol;
- }
- else
- BLOCK_FUNCTION (block) = 0;
-
- /* Now free the links of the list, and empty the list. */
-
- for (next = *listhead; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
- *listhead = 0;
-
- /* Install this block as the superblock
- of all blocks made since the start of this scope
- that don't have superblocks yet. */
-
- opblock = 0;
- for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
- {
- if (BLOCK_SUPERBLOCK (pblock->block) == 0)
- BLOCK_SUPERBLOCK (pblock->block) = block;
- opblock = pblock;
- }
-
- /* Record this block on the list of all blocks in the file.
- Put it after opblock, or at the beginning if opblock is 0.
- This puts the block in the list after all its subblocks. */
-
- pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block));
- pblock->block = block;
- if (opblock)
- {
- pblock->next = opblock->next;
- opblock->next = pblock;
- }
- else
- {
- pblock->next = pending_blocks;
- pending_blocks = pblock;
- }
-}
-
-static struct blockvector *
-make_blockvector ()
-{
- register struct pending_block *next, *next1;
- register struct blockvector *blockvector;
- register int i;
-
- /* Count the length of the list of blocks. */
-
- for (next = pending_blocks, i = 0; next; next = next->next, i++);
-
- blockvector = (struct blockvector *)
- obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *));
-
- /* Copy the blocks into the blockvector.
- This is done in reverse order, which happens to put
- the blocks into the proper order (ascending starting address).
- finish_block has hair to insert each block into the list
- after its subblocks in order to make sure this is true. */
-
- BLOCKVECTOR_NBLOCKS (blockvector) = i;
- for (next = pending_blocks; next; next = next->next)
- BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
-
- /* Now free the links of the list, and empty the list. */
-
- for (next = pending_blocks; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
- pending_blocks = 0;
-
- return blockvector;
-}
-
-/* Manage the vector of line numbers. */
-
-static
-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 (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.
- This is called when a COFF ".file" symbol is seen;
- it indicates the start of data for one original source file. */
-
-static void
-start_symtab ()
-{
- file_symbols = 0;
- global_symbols = 0;
- context_stack = 0;
- within_function = 0;
- last_source_file = 0;
-
- /* Initialize the source file information for this file. */
-
- 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 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 (aout_hdr.entry < cur_src_end_addr
- && aout_hdr.entry >= cur_src_start_addr)
- {
- startup_file_start = cur_src_start_addr;
- startup_file_end = 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. */
-
-static void
-end_symtab ()
-{
- register struct symtab *symtab;
- register struct context_stack *cstk;
- register struct blockvector *blockvector;
- register struct linetable *lv;
-
- /* Finish the lexical context of the last function in the file. */
-
- if (context_stack)
- {
- cstk = context_stack;
- context_stack = 0;
- /* Make a block for the local symbols within. */
- finish_block (cstk->name, &local_symbols, cstk->old_blocks,
- cstk->start_addr, cur_src_end_addr);
- free (cstk);
- }
-
- /* Ignore a file that has no functions with real debugging info. */
- if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0)
- {
- free (line_vector);
- line_vector = 0;
- line_vector_length = -1;
- last_source_file = 0;
- return;
- }
-
- /* Create the two top-level blocks for this file. */
- finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr);
- finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr);
-
- /* Create the blockvector that points to all the file's blocks. */
- blockvector = make_blockvector ();
-
- /* Now create the symtab object for this source file. */
- symtab = (struct symtab *) xmalloc (sizeof (struct symtab));
- symtab->free_ptr = 0;
-
- /* Fill in its components. */
- symtab->blockvector = blockvector;
- symtab->free_code = free_linetable;
- symtab->filename = last_source_file;
- lv = line_vector;
- lv->nitems = line_vector_index;
- symtab->linetable = (struct linetable *)
- xrealloc (lv, (sizeof (struct linetable)
- + lv->nitems * sizeof (struct linetable_entry)));
- symtab->nlines = 0;
- symtab->line_charpos = 0;
-
- /* Link the new symtab into the list of such. */
- symtab->next = symtab_list;
- symtab_list = symtab;
-
- /* Reinitialize for beginning of new file. */
- line_vector = 0;
- line_vector_length = -1;
- last_source_file = 0;
-}
-
-/* Accumulate the misc functions in bunches of 127.
- At the end, copy them all into one newly allocated structure. */
-
-#define MISC_BUNCH_SIZE 127
-
-struct misc_bunch
-{
- struct misc_bunch *next;
- struct misc_function contents[MISC_BUNCH_SIZE];
-};
-
-/* Bunch currently being filled up.
- The next field points to chain of filled bunches. */
-
-static struct misc_bunch *misc_bunch;
-
-/* Number of slots filled in current bunch. */
-
-static int misc_bunch_index;
-
-/* Total number of misc functions recorded so far. */
-
-static int misc_count;
-
-static void
-init_misc_functions ()
-{
- misc_count = 0;
- misc_bunch = 0;
- misc_bunch_index = MISC_BUNCH_SIZE;
-}
-
-static void
-record_misc_function (name, address)
- char *name;
- CORE_ADDR address;
-{
- register struct misc_bunch *new;
-
- if (misc_bunch_index == MISC_BUNCH_SIZE)
- {
- new = (struct misc_bunch *) xmalloc (sizeof (struct misc_bunch));
- misc_bunch_index = 0;
- new->next = misc_bunch;
- misc_bunch = new;
- }
- misc_bunch->contents[misc_bunch_index].name = savestring (name, strlen (name));
- misc_bunch->contents[misc_bunch_index].address = address;
- misc_bunch->contents[misc_bunch_index].type = mf_unknown;
- misc_bunch_index++;
- misc_count++;
-}
-
-/* if we see a function symbol, we do record_misc_function.
- * however, if it turns out the next symbol is '.bf', then
- * we call here to undo the misc definition
- */
-static void
-unrecord_misc_function ()
-{
- if (misc_bunch_index == 0)
- error ("Internal error processing symbol table, at symbol %d.",
- symnum);
- misc_bunch_index--;
- misc_count--;
-}
-
-
-static int
-compare_misc_functions (fn1, fn2)
- struct misc_function *fn1, *fn2;
-{
- /* Return a signed result based on unsigned comparisons
- so that we sort into unsigned numeric order. */
- if (fn1->address < fn2->address)
- return -1;
- if (fn1->address > fn2->address)
- return 1;
- return 0;
-}
-
-static void
-discard_misc_bunches ()
-{
- register struct misc_bunch *next;
-
- while (misc_bunch)
- {
- next = misc_bunch->next;
- free (misc_bunch);
- misc_bunch = next;
- }
-}
-
-static void
-condense_misc_bunches ()
-{
- register int i, j;
- register struct misc_bunch *bunch;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
-
- misc_function_vector
- = (struct misc_function *)
- xmalloc (misc_count * sizeof (struct misc_function));
-
- j = 0;
- bunch = misc_bunch;
- while (bunch)
- {
- for (i = 0; i < misc_bunch_index; i++)
- {
- register char *tmp;
-
- misc_function_vector[j] = bunch->contents[i];
- tmp = misc_function_vector[j].name;
- misc_function_vector[j].name = (tmp[0] == '_' ? tmp + offset : tmp);
- j++;
- }
- bunch = bunch->next;
- misc_bunch_index = MISC_BUNCH_SIZE;
- }
-
- misc_function_count = j;
-
- /* Sort the misc functions by address. */
-
- qsort (misc_function_vector, j, sizeof (struct misc_function),
- compare_misc_functions);
-}
-
-/* Call sort_syms to sort alphabetically
- the symbols of each block of each symtab. */
-
-static int
-compare_symbols (s1, s2)
- struct symbol **s1, **s2;
-{
- /* Names that are less should come first. */
- register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0) return namediff;
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
-}
-
-static void
-sort_syms ()
-{
- register struct symtab *s;
- register int i, nbl;
- register struct blockvector *bv;
- register struct block *b;
-
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- nbl = BLOCKVECTOR_NBLOCKS (bv);
- for (i = 0; i < nbl; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- if (BLOCK_SHOULD_SORT (b))
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
- }
- }
-}
-
-/* This is the symbol-file command. Read the file, analyze its symbols,
- and add a struct symtab to symtab_list. */
-
-void
-symbol_file_command (name)
- char *name;
-{
- int desc;
- int num_symbols;
- int num_sections;
- int symtab_offset;
- extern void close ();
- register int val;
- struct cleanup *old_chain;
-
- dont_repeat ();
-
- if (name == 0)
- {
- if (symtab_list && !query ("Discard symbol table? ", 0))
- error ("Not confirmed.");
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- return;
- }
-
- name = tilde_expand (name);
- make_cleanup (free, name);
-
- if (symtab_list && !query ("Load new symbol table from \"%s\"? ", name))
- error ("Not confirmed.");
-
- if (symfile)
- free (symfile);
- symfile = 0;
-
- {
- char *absolute_name;
-
- desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name);
- if (desc < 0)
- perror_with_name (name);
- else
- name = absolute_name;
- }
-
- old_chain = make_cleanup (close, desc);
- make_cleanup (free_current_contents, &name);
-
- if ((num_symbols = read_file_hdr (desc, &file_hdr)) < 0)
- error ("File \"%s\" not in executable format.", name);
-
- /* If an a.out header is present, read it in. If not (e.g. a .o file)
- deal with its absence. */
- if (file_hdr.f_opthdr == 0
- || read_aout_hdr (desc, &aout_hdr, file_hdr.f_opthdr) < 0)
- {
- /* We will not actually be able to run code, since backtraces would
- fly off the bottom of the stack (there is no way to reliably
- detect bottom of stack), but that's fine since the kernel won't
- run something without an a.out header anyway. Passive examination
- of .o files is one place this might make sense. */
- /* ~0 will not be in any file. */
- aout_hdr.entry = ~0;
- /* set the startup file to be an empty range. */
- startup_file_start = 0;
- startup_file_end = 0;
- }
-
- if (num_symbols == 0)
- {
- free_all_symtabs ();
- error ("%s does not have a symbol-table.\n", name);
- }
-
- printf ("Reading symbol data from %s...", name);
- fflush (stdout);
-
- /* Throw away the old symbol table. */
-
- free_all_symtabs ();
- free_all_psymtabs (); /* Make sure that partial_symtab_list */
- /* is 0 also. */
-
- num_sections = file_hdr.f_nscns;
- symtab_offset = file_hdr.f_symptr;
-
- if (read_section_hdr (desc, _TEXT, &text_hdr, num_sections,
- file_hdr.f_opthdr) < 0)
- error ("\"%s\": can't read text section header", name);
-
- /* Read the line number table, all at once. */
-
- val = init_lineno (desc, text_hdr.s_lnnoptr, text_hdr.s_nlnno);
- if (val < 0)
- error ("\"%s\": error reading line numbers\n", name);
-
- /* Now read the string table, all at once. */
-
- val = init_stringtab (desc, symtab_offset + num_symbols * SYMESZ);
- if (val < 0)
- {
- free_all_symtabs ();
- printf ("\"%s\": can't get string table", name);
- fflush (stdout);
- return;
- }
- make_cleanup (free_stringtab, 0);
-
- /* Position to read the symbol table. Do not read it all at once. */
- val = lseek (desc, (long)symtab_offset, 0);
- if (val < 0)
- perror_with_name (name);
-
- init_misc_functions ();
- make_cleanup (discard_misc_bunches, 0);
-
- /* Now that the executable file is positioned at symbol table,
- process it and define symbols accordingly. */
-
- read_coff_symtab (desc, num_symbols);
-
- patch_opaque_types ();
-
- /* Sort symbols alphabetically within each block. */
-
- sort_syms ();
-
- /* Go over the misc functions and install them in vector. */
-
- condense_misc_bunches ();
-
- /* Don't allow char * to have a typename (else would get caddr_t.) */
-
- TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
-
- /* Make a default for file to list. */
-
- select_source_symtab (0);
-
- symfile = savestring (name, strlen (name));
-
- do_cleanups (old_chain);
-
- printf ("done.\n");
- fflush (stdout);
-}
-
-/* Return name of file symbols were loaded from, or 0 if none.. */
-
-char *
-get_sym_file ()
-{
- return symfile;
-}
-
-/* Simplified internal version of coff symbol table information */
-
-struct coff_symbol {
- char *c_name;
- int c_symnum; /* symbol number of this entry */
- int c_nsyms; /* 1 if syment only, 2 if syment + auxent */
- long c_value;
- int c_sclass;
- int c_secnum;
- unsigned int c_type;
-};
-
-/* 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
-read_coff_symtab (desc, nsyms)
- int desc;
- int nsyms;
-{
- int newfd; /* Avoid multiple closes on same desc */
- FILE *stream;
- register struct context_stack *new;
- struct coff_symbol coff_symbol;
- register struct coff_symbol *cs = &coff_symbol;
- static SYMENT main_sym;
- static AUXENT main_aux;
- struct coff_symbol fcn_cs_saved;
- static SYMENT fcn_sym_saved;
- static AUXENT fcn_aux_saved;
-
- int num_object_files = 0;
- int next_file_symnum = -1;
-
- /* Name of the current file. */
- char *filestring = "";
- int depth;
- int fcn_first_line;
- int fcn_last_line;
- int fcn_start_addr;
- long fcn_line_ptr;
- struct cleanup *old_chain;
-
-
- newfd = dup (desc);
- if (newfd == -1)
- fatal ("Too many open files");
- stream = fdopen (newfd, "r");
-
- old_chain = make_cleanup (free_all_symtabs, 0);
- make_cleanup (fclose, stream);
- nlist_stream_global = stream;
- nlist_nsyms_global = nsyms;
- last_source_file = 0;
- bzero (opaque_type_chain, sizeof opaque_type_chain);
-
- type_vector_length = 160;
- type_vector = (struct typevector *)
- xmalloc (sizeof (struct typevector)
- + type_vector_length * sizeof (struct type *));
- bzero (type_vector->type, type_vector_length * sizeof (struct type *));
-
- start_symtab ();
-
- 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)
- {
- CORE_ADDR last_file_end = cur_src_end_addr;
-
- if (last_source_file)
- end_symtab ();
-
- start_symtab ();
- complete_symtab ("_globals_", 0, first_object_file_end);
- /* done with all files, everything from here on out is globals */
- }
-
- /* Special case for file with type declarations only, no text. */
- if (!last_source_file && cs->c_type != T_NULL && 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 as misc function. if we get '.bf' next,
- * then we undo this step
- */
- record_misc_function (cs->c_name, cs->c_value);
-
- fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
- fcn_start_addr = cs->c_value;
- 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:
- printf ("Bad n_sclass = %d\n", cs->c_sclass);
- 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;
- filestring = getfilename (&main_aux);
- /*
- * Complete symbol table for last object file
- * containing debugging information.
- */
- if (last_source_file)
- {
- end_symtab ();
- start_symtab ();
- }
- num_object_files++;
- break;
-
- case C_STAT:
- if (cs->c_name[0] == '.') {
- if (strcmp (cs->c_name, _TEXT) == 0) {
- if (num_object_files == 1) {
- /* last address of startup file */
- first_object_file_end = cs->c_value +
- main_aux.x_scn.x_scnlen;
- }
- /* for some reason the old code didn't do
- * this if this section entry had
- * main_aux.x_scn.x_nlinno equal to 0
- */
- complete_symtab (filestring, cs->c_value,
- main_aux.x_scn.x_scnlen);
- }
- /* flush rest of '.' symbols */
- break;
- }
- /* fall in for static symbols that don't start with '.' */
- case C_EXT:
- if (cs->c_sclass == C_EXT &&
- cs->c_secnum == N_ABS &&
- strcmp (cs->c_name, _ETEXT) == 0)
- end_of_text_addr = cs->c_value;
- if (cs->c_type == T_NULL) {
- if (cs->c_secnum <= 1) { /* text or abs */
- record_misc_function (cs->c_name, cs->c_value);
- break;
- } else {
- cs->c_type = T_INT;
- }
- }
- (void) process_coff_symbol (cs, &main_aux);
- break;
-
- case C_FCN:
- if (strcmp (cs->c_name, ".bf") == 0)
- {
-#if 0
- /* Don't do this; we want all functions to be on the
- mfl now. */
- unrecord_misc_function ();
-#endif
-
- 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 '{' } */
- fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
-
- new = (struct context_stack *)
- xmalloc (sizeof (struct context_stack));
- new->depth = depth = 0;
- new->next = 0;
- context_stack = new;
- new->locals = 0;
- new->old_blocks = pending_blocks;
- new->start_addr = fcn_start_addr;
- fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
- new->name = process_coff_symbol (&fcn_cs_saved,
- &fcn_aux_saved);
- }
- else if (strcmp (cs->c_name, ".ef") == 0)
- {
- /* 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 '}' */
- fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
- enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line);
- new = context_stack;
-
- if (new == 0)
- error ("Invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
- symnum);
-
- finish_block (new->name, &local_symbols, new->old_blocks,
- new->start_addr,
- fcn_cs_saved.c_value +
- fcn_aux_saved.x_sym.x_misc.x_fsize);
- context_stack = 0;
- within_function = 0;
- free (new);
- }
- break;
-
- case C_BLOCK:
- if (strcmp (cs->c_name, ".bb") == 0)
- {
- new = (struct context_stack *)
- xmalloc (sizeof (struct context_stack));
- depth++;
- new->depth = depth;
- new->next = context_stack;
- context_stack = new;
- new->locals = local_symbols;
- new->old_blocks = pending_blocks;
- new->start_addr = cs->c_value;
- new->name = 0;
- local_symbols = 0;
- }
- else if (strcmp (cs->c_name, ".eb") == 0)
- {
- new = context_stack;
- if (new == 0 || depth != new->depth)
- error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
- symnum);
- if (local_symbols && context_stack->next)
- {
- /* Make a block for the local symbols within. */
- finish_block (0, &local_symbols, new->old_blocks,
- new->start_addr, cs->c_value);
- }
- depth--;
- local_symbols = new->locals;
- context_stack = new->next;
- free (new);
- }
- break;
-
- default:
- (void) process_coff_symbol (cs, &main_aux);
- break;
- }
- }
-
- if (last_source_file)
- end_symtab ();
- fclose (stream);
- discard_cleanups (old_chain);
-}
-
-/* Routines for reading headers and symbols from executable. */
-
-/* Read COFF file header, check magic number,
- and return number of symbols. */
-read_file_hdr (chan, file_hdr)
- int chan;
- FILHDR *file_hdr;
-{
- lseek (chan, 0L, 0);
- if (myread (chan, (char *)file_hdr, FILHSZ) < 0)
- return -1;
-
- switch (file_hdr->f_magic)
- {
-#ifdef MC68MAGIC
- case MC68MAGIC:
-#endif
-#ifdef NS32GMAGIC
- case NS32GMAGIC:
- case NS32SMAGIC:
-#endif
-#ifdef I386MAGIC
- case I386MAGIC:
-#endif
-#ifdef CLIPPERMAGIC
- case CLIPPERMAGIC:
-#endif
- return file_hdr->f_nsyms;
-
- default:
-#ifdef BADMAG
- if (BADMAG(file_hdr))
- return -1;
- else
- return file_hdr->f_nsyms;
-#else
- return -1;
-#endif
- }
-}
-
-read_aout_hdr (chan, aout_hdr, size)
- int chan;
- AOUTHDR *aout_hdr;
- int size;
-{
- lseek (chan, (long)FILHSZ, 0);
- if (size != sizeof (AOUTHDR))
- return -1;
- if (myread (chan, (char *)aout_hdr, size) != size)
- return -1;
- return 0;
-}
-
-/* Read a section header. OPTIONAL_HEADER_SIZE is the size of the
- optional header (normally f_opthdr from the file header).
-
- Return nonnegative for success, -1 for failure. */
-int
-read_section_hdr (chan, section_name, section_hdr, nsects,
- optional_header_size)
- register int chan;
- register char *section_name;
- SCNHDR *section_hdr;
- register int nsects;
- int optional_header_size;
-{
- register int i;
-
- if (lseek (chan, FILHSZ + optional_header_size, 0) < 0)
- return -1;
-
- for (i = 0; i < nsects; i++)
- {
- if (myread (chan, (char *)section_hdr, SCNHSZ) < 0)
- return -1;
- if (strncmp (section_hdr->s_name, section_name, 8) == 0)
- return 0;
- }
- return -1;
-}
-
-read_one_sym (cs, sym, aux)
- register struct coff_symbol *cs;
- register SYMENT *sym;
- register AUXENT *aux;
-{
- cs->c_symnum = symnum;
- fread ((char *)sym, SYMESZ, 1, nlist_stream_global);
- cs->c_nsyms = (sym->n_numaux & 0xff) + 1;
- if (cs->c_nsyms == 2)
- {
- /* doc for coff says there is either no aux entry or just one */
- fread ((char *)aux, AUXESZ, 1, nlist_stream_global);
- }
- else if (cs->c_nsyms > 2)
- error ("more than one aux symbol table entry at symnum=%d\n", symnum);
-
- 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;
-
- symnum += cs->c_nsyms;
-}
-
-/* Support for string table handling */
-
-static char *stringtab = NULL;
-
-static int
-init_stringtab (chan, offset)
- int chan;
- long offset;
-{
- long buffer;
- int val;
-
- if (stringtab)
- {
- free (stringtab);
- stringtab = NULL;
- }
-
- if (lseek (chan, offset, 0) < 0)
- return -1;
-
- val = myread (chan, (char *)&buffer, sizeof buffer);
-
- /* 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 buffer || buffer == 0)
- return 0;
-
- stringtab = (char *) xmalloc (buffer);
- if (stringtab == NULL)
- return -1;
-
- bcopy (&buffer, stringtab, sizeof buffer);
-
- val = myread (chan, stringtab + sizeof buffer, buffer - sizeof buffer);
- if (val != buffer - sizeof buffer || stringtab[buffer - 1] != '\0')
- return -1;
-
- return 0;
-}
-
-static void
-free_stringtab ()
-{
- if (stringtab)
- free (stringtab);
- stringtab = NULL;
-}
-
-static char *
-getsymname (symbol_entry)
- SYMENT *symbol_entry;
-{
- static char buffer[SYMNMLEN+1];
- char *result;
-
- if (symbol_entry->n_zeroes == 0)
- {
- result = stringtab + symbol_entry->n_offset;
- }
- else
- {
- strncpy (buffer, symbol_entry->n_name, SYMNMLEN);
- buffer[SYMNMLEN] = '\0';
- result = buffer;
- }
- return result;
-}
-
-static char *
-getfilename (aux_entry)
- AUXENT *aux_entry;
-{
- static char buffer[BUFSIZ];
- register char *temp;
- char *result;
- extern char *rindex ();
-
-#ifndef COFF_NO_LONG_FILE_NAMES
- if (aux_entry->x_file.x_foff != 0)
- strcpy (buffer, stringtab + aux_entry->x_file.x_foff);
- else
-#endif
- {
- strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
- buffer[FILNMLEN] = '\0';
- }
- result = buffer;
- if ((temp = rindex (result, '/')) != NULL)
- result = temp + 1;
- return (result);
-}
-
-/* Support for line number handling */
-static char *linetab = NULL;
-static long linetab_offset;
-static int linetab_count;
-
-static int
-init_lineno (chan, offset, count)
- int chan;
- long offset;
- int count;
-{
- int val;
-
- if (lseek (chan, offset, 0) < 0)
- return -1;
-
- if (linetab)
- free (linetab);
- linetab = (char *) xmalloc (count * LINESZ);
-
- val = myread (chan, linetab, count * LINESZ);
- if (val != count * LINESZ)
- return -1;
-
- linetab_offset = offset;
- linetab_count = count;
- return 0;
-}
-
-static void
-enter_linenos (file_offset, first_line, last_line)
- long file_offset;
- register int first_line;
- register int last_line;
-{
- register char *rawptr = &linetab[file_offset - linetab_offset];
- struct lineno lptr;
-
- /* skip first line entry for each function */
- rawptr += LINESZ;
- /* line numbers start at one for the first line of the function */
- first_line--;
-
- /* Bcopy since occaisionally rawptr isn't pointing at long
- boundaries. */
- for (bcopy (rawptr, &lptr, LINESZ);
- lptr.l_lnno && lptr.l_lnno <= last_line;
- rawptr += LINESZ, bcopy (rawptr, &lptr, LINESZ))
- {
- record_line (first_line + lptr.l_lnno, lptr.l_addr.l_paddr);
- }
-}
-
-static int
-hashname (name)
- char *name;
-{
- register char *p = name;
- register int total = p[0];
- register int c;
-
- c = p[1];
- total += c << 2;
- if (c)
- {
- c = p[2];
- total += c << 4;
- if (c)
- total += p[3] << 6;
- }
-
- return total % HASHSIZE;
-}
-
-static void
-patch_type (type, real_type)
- struct type *type;
- struct type *real_type;
-{
- register struct type *target = TYPE_TARGET_TYPE (type);
- register struct type *real_target = TYPE_TARGET_TYPE (real_type);
- int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field);
-
- TYPE_LENGTH (target) = TYPE_LENGTH (real_target);
- TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target);
- TYPE_FIELDS (target) = (struct field *)
- obstack_alloc (symbol_obstack, field_size);
-
- bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size);
-
- if (TYPE_NAME (real_target))
- {
- if (TYPE_NAME (target))
- free (TYPE_NAME (target));
- TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", "");
- }
-}
-
-/* Patch up all appropriate typdef 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;
-
- /* Look at each symbol in the per-file block of each symtab. */
- for (s = symtab_list; s; s = s->next)
- {
- register struct block *b;
- register int i;
-
- /* Go through the per-file symbols only */
- b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), 1);
- for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
- {
- register struct symbol *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. */
- real_sym = BLOCK_SYM (b, i);
- if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF &&
- SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE &&
- TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR &&
- TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0)
- {
- register char *name = SYMBOL_NAME (real_sym);
- register int hash = hashname (name);
- register struct symbol *sym, *prev;
-
- prev = 0;
- for (sym = opaque_type_chain[hash]; sym;)
- {
- if (name[0] == SYMBOL_NAME (sym)[0] &&
- !strcmp (name + 1, SYMBOL_NAME (sym) + 1))
- {
- if (prev)
- SYMBOL_VALUE (prev) = SYMBOL_VALUE (sym);
- else
- opaque_type_chain[hash]
- = (struct symbol *) SYMBOL_VALUE (sym);
-
- patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym));
-
- if (prev)
- sym = (struct symbol *) SYMBOL_VALUE (prev);
- else
- sym = opaque_type_chain[hash];
- }
- else
- {
- prev = sym;
- sym = (struct symbol *) SYMBOL_VALUE (sym);
- }
- }
- }
- }
- }
-}
-
-static struct symbol *
-process_coff_symbol (cs, aux)
- register struct coff_symbol *cs;
- register AUXENT *aux;
-{
- register struct symbol *sym
- = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
- char *name;
- char *dot;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
-
- bzero (sym, sizeof (struct symbol));
- name = cs->c_name;
- name = (name[0] == '_' ? name + offset : name);
- SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name));
-
- /* default assumptions */
- SYMBOL_VALUE (sym) = cs->c_value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
-
- if (ISFCN (cs->c_type))
- {
- SYMBOL_TYPE (sym) =
- lookup_function_type (decode_function_type (cs, cs->c_type, aux));
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- if (cs->c_sclass == C_STAT)
- add_symbol_to_list (sym, &file_symbols);
- else if (cs->c_sclass == C_EXT)
- add_symbol_to_list (sym, &global_symbols);
- }
- else
- {
- SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux);
- switch (cs->c_sclass)
- {
- case C_NULL:
- break;
-
- case C_AUTO:
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case C_EXT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- case C_STAT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- if (within_function) {
- /* Static symbol of local scope */
- add_symbol_to_list (sym, &local_symbols);
- }
- else {
- /* Static symbol at top level of file */
- add_symbol_to_list (sym, &file_symbols);
- }
- break;
-
- case C_REG:
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case C_LABEL:
- break;
-
- case C_ARG:
- SYMBOL_CLASS (sym) = LOC_ARG;
- add_symbol_to_list (sym, &local_symbols);
-#ifndef clipper
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- if (SYMBOL_TYPE (sym) == builtin_type_char
- || SYMBOL_TYPE (sym) == builtin_type_short)
- SYMBOL_TYPE (sym) = builtin_type_int;
- else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_short)
- SYMBOL_TYPE (sym) = builtin_type_unsigned_int;
-#endif
- break;
-
- case C_REGPARM:
- SYMBOL_CLASS (sym) = LOC_REGPARM;
- add_symbol_to_list (sym, &local_symbols);
-#ifndef clipper
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- if (SYMBOL_TYPE (sym) == builtin_type_char
- || SYMBOL_TYPE (sym) == builtin_type_short)
- SYMBOL_TYPE (sym) = builtin_type_int;
- else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_short)
- SYMBOL_TYPE (sym) = builtin_type_unsigned_int;
-#endif
- break;
-
- case C_TPDEF:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
-
- /* If type has no name, give it one */
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym))
- = concat (SYMBOL_NAME (sym), "", "");
-
- /* Keep track of any type which points to empty structured type,
- so it can be filled from a definition from another file */
- if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR &&
- TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0)
- {
- register int i = hashname (SYMBOL_NAME (sym));
-
- SYMBOL_VALUE (sym) = (int) opaque_type_chain[i];
- opaque_type_chain[i] = sym;
- }
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case C_STRTAG:
- case C_UNTAG:
- case C_ENTAG:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym))
- = concat ("",
- (cs->c_sclass == C_ENTAG
- ? "enum "
- : (cs->c_sclass == C_STRTAG
- ? "struct " : "union ")),
- SYMBOL_NAME (sym));
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- default:
- break;
- }
- }
- return sym;
-}
-
-/* Decode a coff type specifier;
- return the type that is meant. */
-
-static
-struct type *
-decode_type (cs, c_type, aux)
- register struct coff_symbol *cs;
- unsigned int c_type;
- register AUXENT *aux;
-{
- register struct type *type = 0;
- register int n;
- 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);
- type = lookup_pointer_type (type);
- }
- else if (ISFCN (c_type))
- {
- type = decode_type (cs, new_c_type, aux);
- type = lookup_function_type (type);
- }
- else if (ISARY (c_type))
- {
- int i, n;
- register unsigned short *dim;
- struct type *base_type;
-
- /* Define an array type. */
- /* auxent refers to array, not base type */
- if (aux->x_sym.x_tagndx == 0)
- cs->c_nsyms = 1;
-
- /* 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;
-
- type = (struct type *)
- obstack_alloc (symbol_obstack, sizeof (struct type));
- bzero (type, sizeof (struct type));
-
- base_type = decode_type (cs, new_c_type, aux);
-
- TYPE_CODE (type) = TYPE_CODE_ARRAY;
- TYPE_TARGET_TYPE (type) = base_type;
- TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type);
- }
- return type;
- }
-
- /* Reference to existing type */
- if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx != 0)
- {
- type = coff_alloc_type (aux->x_sym.x_tagndx);
- return type;
- }
-
- return decode_base_type (cs, BTYPE (c_type), aux);
-}
-
-/* Decode a coff type specifier for function definition;
- return the type that the function returns. */
-
-static
-struct type *
-decode_function_type (cs, c_type, aux)
- register struct coff_symbol *cs;
- unsigned int c_type;
- register AUXENT *aux;
-{
- if (aux->x_sym.x_tagndx == 0)
- cs->c_nsyms = 1; /* auxent refers to function, not base type */
-
- return decode_type (cs, DECREF (cs->c_type), aux);
-}
-
-/* basic C types */
-
-static
-struct type *
-decode_base_type (cs, c_type, aux)
- register struct coff_symbol *cs;
- unsigned int c_type;
- register AUXENT *aux;
-{
- struct type *type;
-
- switch (c_type)
- {
- case T_NULL:
- /* shows up with "void (*foo)();" structure members */
- return builtin_type_void;
-
- case T_ARG:
- /* shouldn't show up here */
- break;
-
- case T_CHAR:
- return builtin_type_char;
-
- case T_SHORT:
- return builtin_type_short;
-
- case T_INT:
- return builtin_type_int;
-
- case T_LONG:
- return builtin_type_long;
-
- case T_FLOAT:
- return builtin_type_float;
-
- case T_DOUBLE:
- return builtin_type_double;
-
- case T_STRUCT:
- if (cs->c_nsyms != 2)
- {
- /* anonymous structure type */
- type = coff_alloc_type (cs->c_symnum);
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- TYPE_NAME (type) = concat ("struct ", "<opaque>", "");
- TYPE_LENGTH (type) = 0;
- TYPE_FIELDS (type) = 0;
- TYPE_NFIELDS (type) = 0;
- }
- else
- {
- type = read_struct_type (cs->c_symnum,
- aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx);
- }
- return type;
-
- case T_UNION:
- if (cs->c_nsyms != 2)
- {
- /* anonymous union type */
- type = coff_alloc_type (cs->c_symnum);
- TYPE_NAME (type) = concat ("union ", "<opaque>", "");
- TYPE_LENGTH (type) = 0;
- TYPE_FIELDS (type) = 0;
- TYPE_NFIELDS (type) = 0;
- }
- else
- {
- type = read_struct_type (cs->c_symnum,
- aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx);
- }
- TYPE_CODE (type) = TYPE_CODE_UNION;
- return type;
-
- case T_ENUM:
- return read_enum_type (cs->c_symnum,
- aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx);
-
- case T_MOE:
- /* shouldn't show up here */
- break;
-
- case T_UCHAR:
- return builtin_type_unsigned_char;
-
- case T_USHORT:
- return builtin_type_unsigned_short;
-
- case T_UINT:
- return builtin_type_unsigned_int;
-
- case T_ULONG:
- return builtin_type_unsigned_long;
- }
- printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum);
- return builtin_type_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 *
-read_struct_type (index, length, lastsym)
- int index;
- int length;
- int lastsym;
-{
- struct nextfield
- {
- struct nextfield *next;
- struct field field;
- };
-
- register struct type *type;
- register struct nextfield *list = 0;
- struct nextfield *new;
- int nfields = 0;
- register int n;
- char *name;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
- struct coff_symbol member_sym;
- register struct coff_symbol *ms = &member_sym;
- SYMENT sub_sym;
- AUXENT sub_aux;
- int done = 0;
-
- type = coff_alloc_type (index);
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- 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 = (name[0] == '_' ? name + offset : name);
-
- switch (ms->c_sclass)
- {
- case C_MOS:
- case C_MOU:
-
- /* Get space to record the next field's data. */
- new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new->next = list;
- list = new;
-
- /* Save the data. */
- list->field.name = savestring (name, strlen (name));
- list->field.type = decode_type (ms, ms->c_type, &sub_aux);
- list->field.bitpos = 8 * ms->c_value;
- list->field.bitsize = 0;
- nfields++;
- break;
-
- case C_FIELD:
-
- /* Get space to record the next field's data. */
- new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new->next = list;
- list = new;
-
- /* Save the data. */
- list->field.name = savestring (name, strlen (name));
- list->field.type = decode_type (ms, ms->c_type, &sub_aux);
- list->field.bitpos = ms->c_value;
- list->field.bitsize = 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_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *)
- obstack_alloc (symbol_obstack, sizeof (struct field) * nfields);
-
- /* Copy the saved-up fields into the field vector. */
-
- for (n = nfields; list; list = list->next)
- TYPE_FIELD (type, --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 *
-read_enum_type (index, length, lastsym)
- int index;
- int length;
- int lastsym;
-{
- register struct symbol *sym;
- register struct type *type;
- int nsyms = 0;
- struct pending **symlist;
- struct coff_symbol member_sym;
- register struct coff_symbol *ms = &member_sym;
- SYMENT sub_sym;
- AUXENT sub_aux;
- struct pending *osyms, *syms;
- register int n;
- char *name;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
-
- type = coff_alloc_type (index);
- if (within_function)
- symlist = &local_symbols;
- else
- symlist = &file_symbols;
- osyms = *symlist;
-
- while (symnum < lastsym && symnum < nlist_nsyms_global)
- {
- read_one_sym (ms, &sub_sym, &sub_aux);
- name = ms->c_name;
- name = (name[0] == '_' ? name + offset : name);
-
- switch (ms->c_sclass)
- {
- case C_MOE:
- sym = (struct symbol *) xmalloc (sizeof (struct symbol));
- bzero (sym, sizeof (struct symbol));
-
- SYMBOL_NAME (sym) = savestring (name, strlen (name));
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_VALUE (sym) = ms->c_value;
- add_symbol_to_list (sym, symlist);
- nsyms++;
- break;
-
- case C_EOS:
- break;
- }
- }
-
- /* Now fill in the fields of the type-structure. */
-
- TYPE_LENGTH (type) = sizeof (int);
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- TYPE_NFIELDS (type) = nsyms;
- TYPE_FIELDS (type) = (struct field *)
- obstack_alloc (symbol_obstack, 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. */
-
- for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next)
- {
- SYMBOL_TYPE (syms->symbol) = type;
- TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol);
- TYPE_FIELD_VALUE (type, n) = 0;
- TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol);
- TYPE_FIELD_BITSIZE (type, n) = 0;
- }
- return type;
-}
-
-/* This function is really horrible, but to avoid it, there would need
- to be more filling in of forward references. THIS SHOULD BE MOVED
- OUT OF COFFREAD.C AND DBXREAD.C TO SOME PLACE WHERE IT CAN BE SHARED. */
-int
-fill_in_vptr_fieldno (type)
- struct type *type;
-{
- if (TYPE_VPTR_FIELDNO (type) < 0)
- TYPE_VPTR_FIELDNO (type) =
- fill_in_vptr_fieldno (TYPE_BASECLASS (type, 1));
- return TYPE_VPTR_FIELDNO (type);
-}
-
-/* partial symbol tables are not implemented in coff, therefore
- block_for_pc() (and others) will never decide to call this. */
-
-extern struct symtab *
-psymtab_to_symtab ()
-{
- fatal ("error: Someone called psymtab_to_symtab\n");
-}
-
-/* These will stay zero all the time */
-struct psymbol_allocation_list global_psymbols, static_psymbols;
-
-_initialize_coff ()
-{
- symfile = 0;
-
- bzero (&global_psymbols, sizeof (global_psymbols));
- bzero (&static_psymbols, sizeof (static_psymbols));
-
- add_com ("symbol-file", class_files, symbol_file_command,
- "Load symbol table (in coff format) from executable file FILE.");
-}
-
-
-#endif /* COFF_FORMAT */
-