/* 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 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
-\f
-#include "defs.h"
-#include "param.h"
-#ifdef COFF_FORMAT
-#include "initialize.h"
-#include "symtab.h"
+ Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997
+ Free Software Foundation, Inc.
+ Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
-#include <a.out.h>
-#include <stdio.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 void free_all_symtabs ();
-
-START_FILE
-
-/* 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. */
+This file is part of GDB.
-static CORE_ADDR cur_src_start_addr;
-static CORE_ADDR cur_src_end_addr;
+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.
-/* End of the text segment of the executable file,
- as found in the symbol _etext. */
+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.
-static CORE_ADDR end_of_text_addr;
+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. */
-/* The addresses of the symbol table stream and number of symbols
- of the object file we are reading (as copied into core). */
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "breakpoint.h"
+
+#include "bfd.h"
+#include "obstack.h"
+
+#include "gdb_string.h"
+#include <ctype.h>
+
+#include "coff/internal.h" /* Internal format of COFF symbols in BFD */
+#include "libcoff.h" /* FIXME secret internal data from BFD */
+
+#include "symfile.h"
+#include "objfiles.h"
+#include "buildsym.h"
+#include "gdb-stabs.h"
+#include "stabsread.h"
+#include "complaints.h"
+#include "target.h"
+
+struct coff_symfile_info {
+ file_ptr min_lineno_offset; /* Where in file lowest line#s are */
+ file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
+
+ CORE_ADDR textaddr; /* Addr of .text section. */
+ unsigned int textsize; /* Size of .text section. */
+ struct stab_section_list *stabsects; /* .stab sections. */
+ asection *stabstrsect; /* Section pointer for .stab section */
+ char *stabstrdata;
+};
-static FILE *nlist_stream_global;
-static int nlist_nsyms_global;
+/* Translate an external name string into a user-visible name. */
+#define EXTERNAL_NAME(string, abfd) \
+ (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string)
-/* The file and text section headers of the symbol file */
+/* To be an sdb debug type, type must have at least a basic or primary
+ derived type. Using this rather than checking against T_NULL is
+ said to prevent core dumps if we try to operate on Michael Bloom
+ dbx-in-coff file. */
-static FILHDR file_hdr;
-static SCNHDR text_hdr;
+#define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
-/* The index in the symbol table of the last coff symbol that was processed. */
+/* Convert from an sdb register number to an internal gdb register number.
+ This should be defined in tm.h, if REGISTER_NAMES is not set up
+ to map one to one onto the sdb register numbers. */
-static int symnum;
+#ifndef SDB_REG_TO_REGNUM
+# define SDB_REG_TO_REGNUM(value) (value)
+#endif
-/* Vector of types defined so far, indexed by their coff symnum. */
+/* Core address of start and end of text of current source file.
+ This comes from a ".text" symbol where x_nlinno > 0. */
-static struct typevector *type_vector;
+static CORE_ADDR current_source_start_addr;
+static CORE_ADDR current_source_end_addr;
-/* Number of elements allocated for type_vector currently. */
+/* The addresses of the symbol table stream and number of symbols
+ of the object file we are reading (as copied into core). */
-static int type_vector_length;
+static bfd *nlist_bfd_global;
+static int nlist_nsyms_global;
/* Vector of line number information. */
static int line_vector_length;
+/* Pointers to scratch storage, used for reading raw symbols and auxents. */
+
+static char *temp_sym;
+static char *temp_aux;
+
+/* Local variables that hold the shift and mask values for the
+ COFF file that we are currently reading. These come back to us
+ from BFD, and are referenced by their macro names, as well as
+ internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
+ macros from include/coff/internal.h . */
+
+static unsigned local_n_btmask;
+static unsigned local_n_btshft;
+static unsigned local_n_tmask;
+static unsigned local_n_tshift;
+
+#define N_BTMASK local_n_btmask
+#define N_BTSHFT local_n_btshft
+#define N_TMASK local_n_tmask
+#define N_TSHIFT local_n_tshift
+
+/* Local variables that hold the sizes in the file of various COFF structures.
+ (We only need to know this to read them from the file -- BFD will then
+ translate the data in them, into `internal_xxx' structs in the right
+ byte order, alignment, etc.) */
+
+static unsigned local_linesz;
+static unsigned local_symesz;
+static unsigned local_auxesz;
+
+/* This is set if this is a PE format file. */
+
+static int pe_file;
+
/* Chain of typedefs of pointers to empty struct/union types.
- They are chained thru the SYMBOL_VALUE. */
+ They are chained thru the SYMBOL_VALUE_CHAIN. */
-#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. */
+/* Complaints about various problems in the file being read */
-struct pending
-{
- struct pending *next;
- struct symbol *symbol;
-};
+struct complaint ef_complaint =
+ {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0};
-/* Here are the three lists that symbols are put on. */
+struct complaint ef_stack_complaint =
+ {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0};
-struct pending *file_symbols; /* static at top level, and types */
+struct complaint eb_stack_complaint =
+ {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0};
-struct pending *global_symbols; /* global functions and variables */
+struct complaint bf_no_aux_complaint =
+ {"`.bf' symbol %d has no aux entry", 0, 0};
-struct pending *local_symbols; /* everything local to lexical context */
+struct complaint ef_no_aux_complaint =
+ {"`.ef' symbol %d has no aux entry", 0, 0};
-/* List of unclosed lexical contexts
- (that will become blocks, eventually). */
+struct complaint lineno_complaint =
+ {"Line number pointer %d lower than start of line numbers", 0, 0};
-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 complaint unexpected_type_complaint =
+ {"Unexpected type for symbol %s", 0, 0};
+
+struct complaint bad_sclass_complaint =
+ {"Bad n_sclass for symbol %s", 0, 0};
+
+struct complaint misordered_blocks_complaint =
+ {"Blocks out of order at address %x", 0, 0};
+
+struct complaint tagndx_bad_complaint =
+ {"Symbol table entry for %s has bad tagndx value", 0, 0};
+
+struct complaint eb_complaint =
+ {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
+
+/* Simplified internal version of coff symbol table information */
+
+struct coff_symbol {
+ char *c_name;
+ int c_symnum; /* symbol number of this entry */
+ int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */
+ long c_value;
+ int c_sclass;
+ int c_secnum;
+ unsigned int c_type;
};
-struct context_stack *context_stack;
+static struct type *coff_read_struct_type PARAMS ((int, int, int));
+
+static struct type *decode_base_type PARAMS ((struct coff_symbol *,
+ unsigned int,
+ union internal_auxent *));
+
+static struct type *decode_type PARAMS ((struct coff_symbol *, unsigned int,
+ union internal_auxent *));
+
+static struct type *decode_function_type PARAMS ((struct coff_symbol *,
+ unsigned int,
+ union internal_auxent *));
+
+static struct type *coff_read_enum_type PARAMS ((int, int, int));
+
+static struct symbol *process_coff_symbol PARAMS ((struct coff_symbol *,
+ union internal_auxent *,
+ struct section_offsets *,
+ struct objfile *));
+
+static void patch_opaque_types PARAMS ((struct symtab *));
-/* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
+static void patch_type PARAMS ((struct type *, struct type *));
-int within_function;
+static void enter_linenos PARAMS ((long, int, int, struct section_offsets *));
-/* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
+static void free_linetab PARAMS ((void));
-struct pending_block
+static int init_lineno PARAMS ((bfd *, long, int));
+
+static char *getsymname PARAMS ((struct internal_syment *));
+
+static char *coff_getfilename PARAMS ((union internal_auxent *));
+
+static void free_stringtab PARAMS ((void));
+
+static int init_stringtab PARAMS ((bfd *, long));
+
+static void read_one_sym PARAMS ((struct coff_symbol *,
+ struct internal_syment *,
+ union internal_auxent *));
+
+static void coff_symtab_read PARAMS ((long, int, struct section_offsets *,
+ struct objfile *));
+
+static void find_linenos PARAMS ((bfd *, sec_ptr, PTR));
+
+static void coff_symfile_init PARAMS ((struct objfile *));
+
+static void coff_new_init PARAMS ((struct objfile *));
+
+static void coff_symfile_read PARAMS ((struct objfile *,
+ struct section_offsets *, int));
+
+static void coff_symfile_finish PARAMS ((struct objfile *));
+
+static void record_minimal_symbol PARAMS ((char *, CORE_ADDR,
+ enum minimal_symbol_type,
+ struct objfile *));
+
+static void coff_end_symtab PARAMS ((struct objfile *));
+
+static void complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int));
+
+static void coff_start_symtab PARAMS ((void));
+
+static void coff_record_line PARAMS ((int, CORE_ADDR));
+
+static struct type *coff_alloc_type PARAMS ((int));
+
+static struct type **coff_lookup_type PARAMS ((int));
+
+static void coff_locate_sections PARAMS ((bfd *, asection *, PTR));
+\f
+/* We are called once per section from coff_symfile_read. We
+ need to examine each section we are passed, check to see
+ if it is something we are interested in processing, and
+ if so, stash away some access information for the section.
+
+ FIXME: The section names should not be hardwired strings (what
+ should they be? I don't think most object file formats have enough
+ section flags to specify what kind of debug section it is
+ -kingdon). */
+
+static void
+coff_locate_sections (abfd, sectp, csip)
+ bfd *abfd;
+ asection *sectp;
+ PTR csip;
{
- struct pending_block *next;
- struct block *block;
+ register struct coff_symfile_info *csi;
+ const char *name;
+
+ csi = (struct coff_symfile_info *) csip;
+ name = bfd_get_section_name (abfd, sectp);
+ if (STREQ (name, ".text"))
+ {
+ csi->textaddr = bfd_section_vma (abfd, sectp);
+ csi->textsize += bfd_section_size (abfd, sectp);
+ }
+ else if (strncmp (name, ".text", sizeof ".text" - 1) == 0)
+ {
+ csi->textsize += bfd_section_size (abfd, sectp);
+ }
+ else if (STREQ (name, ".stabstr"))
+ {
+ csi->stabstrsect = sectp;
+ }
+ else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
+ {
+ const char *s;
+
+ /* We can have multiple .stab sections if linked with
+ --split-by-reloc. */
+ for (s = name + sizeof ".stab" - 1; *s != '\0'; s++)
+ if (! isdigit (*s))
+ break;
+ if (*s == '\0')
+ {
+ struct stab_section_list *n, **pn;
+
+ n = ((struct stab_section_list *)
+ xmalloc (sizeof (struct stab_section_list)));
+ n->section = sectp;
+ n->next = NULL;
+ for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next)
+ ;
+ *pn = n;
+
+ /* This will be run after coffstab_build_psymtabs is called
+ in coff_symfile_read, at which point we no longer need
+ the information. */
+ make_cleanup (free, n);
+ }
+ }
+}
+
+/* Return the section_offsets* that CS points to. */
+static int cs_to_section PARAMS ((struct coff_symbol *, struct objfile *));
+
+struct find_targ_sec_arg {
+ int targ_index;
+ asection **resultp;
};
-struct pending_block *pending_blocks;
+static void find_targ_sec PARAMS ((bfd *, asection *, void *));
+
+static void find_targ_sec (abfd, sect, obj)
+ bfd *abfd;
+ asection *sect;
+ PTR obj;
+{
+ struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj;
+ if (sect->target_index == args->targ_index)
+ *args->resultp = sect;
+}
+
+/* Return the section number (SECT_OFF_*) that CS points to. */
+static int
+cs_to_section (cs, objfile)
+ struct coff_symbol *cs;
+ struct objfile *objfile;
+{
+ asection *sect = NULL;
+ struct find_targ_sec_arg args;
+ int off = SECT_OFF_TEXT;
+
+ args.targ_index = cs->c_secnum;
+ args.resultp = §
+ bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
+ if (sect != NULL)
+ {
+ /* This is the section. Figure out what SECT_OFF_* code it is. */
+ if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
+ off = SECT_OFF_TEXT;
+ else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
+ off = SECT_OFF_DATA;
+ else
+ off = SECT_OFF_BSS;
+ }
+ return off;
+}
-extern CORE_ADDR first_object_file_end; /* From blockframe.c */
+/* Return the address of the section of a COFF symbol. */
-/* File name symbols were loaded from. */
+static CORE_ADDR cs_section_address PARAMS ((struct coff_symbol *, bfd *));
+
+static CORE_ADDR
+cs_section_address (cs, abfd)
+ struct coff_symbol *cs;
+ bfd *abfd;
+{
+ asection *sect = NULL;
+ struct find_targ_sec_arg args;
+ CORE_ADDR addr = 0;
+
+ args.targ_index = cs->c_secnum;
+ args.resultp = §
+ bfd_map_over_sections (abfd, find_targ_sec, &args);
+ if (sect != NULL)
+ addr = bfd_get_section_vma (objfile->obfd, sect);
+ return addr;
+}
-static char *symfile;
-\f
/* 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.
{
if (index >= type_vector_length)
{
+ int old_vector_length = type_vector_length;
+
type_vector_length *= 2;
- type_vector = (struct typevector *)
- xrealloc (type_vector, sizeof (struct typevector)
- + type_vector_length * sizeof (struct type *));
- bzero (&type_vector->type[type_vector_length / 2],
- type_vector_length * sizeof (struct type *) / 2);
+ if (index /* is still */ >= type_vector_length)
+ type_vector_length = index * 2;
+
+ type_vector = (struct type **)
+ xrealloc ((char *) type_vector,
+ type_vector_length * sizeof (struct type *));
+ memset (&type_vector[old_vector_length], 0,
+ (type_vector_length - old_vector_length) * sizeof(struct type *));
}
- return &type_vector->type[index];
+ return &type_vector[index];
}
/* Make sure there is a type allocated for type number index
/* 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)
+ if (type == NULL)
{
- type = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
- bzero (type, sizeof (struct type));
+ type = alloc_type (current_objfile);
*type_addr = type;
}
return type;
}
\f
-/* maintain the lists of symbols and blocks */
+/* Record a line number entry for line LINE at address PC.
+ FIXME: Use record_line instead. */
-/* Add a symbol to one of the lists of symbols. */
static void
-add_symbol_to_list (symbol, listhead)
- struct symbol *symbol;
- struct pending **listhead;
+coff_record_line (line, pc)
+ int line;
+ CORE_ADDR pc;
{
- register struct pending *link
- = (struct pending *) xmalloc (sizeof (struct pending));
+ 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;
+}
+\f
+/* 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. */
- link->next = *listhead;
- link->symbol = symbol;
- *listhead = link;
+static void
+coff_start_symtab ()
+{
+ start_symtab (
+ /* We fill in the filename later. start_symtab puts
+ this pointer into last_source_file and we put it in
+ subfiles->name, which end_symtab frees; that's why
+ it must be malloc'd. */
+ savestring ("", 0),
+ /* We never know the directory name for COFF. */
+ NULL,
+ /* The start address is irrelevant, since we set
+ last_source_start_addr in coff_end_symtab. */
+ 0);
+ record_debugformat ("COFF");
+
+ /* 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));
}
-/* Take one of the lists of symbols and make a block from it.
- Put the block on the list of pending blocks. */
+/* 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
-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;
+complete_symtab (name, start_addr, size)
+ char *name;
+ CORE_ADDR start_addr;
+ unsigned int size;
+{
+ if (last_source_file != NULL)
+ free (last_source_file);
+ last_source_file = savestring (name, strlen (name));
+ current_source_start_addr = start_addr;
+ current_source_end_addr = start_addr + size;
+
+ if (current_objfile -> ei.entry_point >= current_source_start_addr &&
+ current_objfile -> ei.entry_point < current_source_end_addr)
+ {
+ current_objfile -> ei.entry_file_lowpc = current_source_start_addr;
+ current_objfile -> ei.entry_file_highpc = current_source_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
+coff_end_symtab (objfile)
+ struct objfile *objfile;
+{
+ struct symtab *symtab;
+
+ last_source_start_addr = current_source_start_addr;
+
+ /* For no good reason, this file stores the number of entries in a
+ separate variable instead of in line_vector->nitems. Fix it. */
+ if (line_vector)
+ line_vector->nitems = line_vector_index;
+
+ /* For COFF, we only have one subfile, so we can just look at
+ subfiles and not worry about there being other elements in the
+ chain. We fill in various fields now because we didn't know them
+ before (or because doing it now is simply an artifact of how this
+ file used to be written). */
+ subfiles->line_vector = line_vector;
+ subfiles->name = last_source_file;
+
+ symtab = end_symtab (current_source_end_addr, objfile, 0);
+
+ if (symtab != NULL)
+ free_named_symtabs (symtab->filename);
+
+ /* Reinitialize for beginning of new file. */
+ line_vector = 0;
+ line_vector_length = -1;
+ last_source_file = NULL;
+}
+\f
+static void
+record_minimal_symbol (name, address, type, objfile)
+ char *name;
+ CORE_ADDR address;
+ enum minimal_symbol_type type;
+ struct objfile *objfile;
+{
+ /* We don't want TDESC entry points in the minimal symbol table */
+ if (name[0] == '@') return;
+
+ prim_record_minimal_symbol (name, address, type, objfile);
+}
+\f
+/* coff_symfile_init ()
+ is the coff-specific initialization routine for reading symbols.
+ It is passed a struct objfile which contains, among other things,
+ the BFD for the file whose symbols are being read, and a slot for
+ a pointer to "private data" which we fill with cookies and other
+ treats for coff_symfile_read ().
+
+ We will only be called if this is a COFF or COFF-like file.
+ BFD handles figuring out the format of the file, and code in symtab.c
+ uses BFD's determination to vector to us.
+
+ The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
+
+static void
+coff_symfile_init (objfile)
+ struct objfile *objfile;
+{
+ /* Allocate struct to keep track of stab reading. */
+ objfile->sym_stab_info = (PTR)
+ xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
+
+ memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
+
+ /* Allocate struct to keep track of the symfile */
+ objfile->sym_private = xmmalloc (objfile->md,
+ sizeof (struct coff_symfile_info));
+
+ memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info));
+
+ /* COFF objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
+
+ 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_linenos (abfd, asect, vpinfo)
+ bfd *abfd;
+ sec_ptr asect;
+ PTR vpinfo;
+{
+ struct coff_symfile_info *info;
+ int size, count;
+ file_ptr offset, maxoff;
+
+/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
+ count = asect->lineno_count;
+/* End of warning */
- /* Count the length of the list of symbols. */
+ if (count == 0)
+ return;
+ size = count * local_linesz;
- for (next = *listhead, i = 0; next; next = next->next, i++);
+ info = (struct coff_symfile_info *)vpinfo;
+/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
+ offset = asect->line_filepos;
+/* End of warning */
- block = (struct block *)
- obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *));
+ if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
+ info->min_lineno_offset = offset;
+
+ maxoff = offset + size;
+ if (maxoff > info->max_lineno_offset)
+ info->max_lineno_offset = maxoff;
+}
- /* Copy the symbols into the block. */
- BLOCK_NSYMS (block) = i;
- for (next = *listhead; next; next = next->next)
- BLOCK_SYM (block, --i) = next->symbol;
+/* The BFD for this file -- only good while we're actively reading
+ symbols into a psymtab or a symtab. */
- BLOCK_START (block) = start;
- BLOCK_END (block) = end;
- BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */
+static bfd *symfile_bfd;
- /* Put the block in as the value of the symbol that names it. */
+/* Read a symbol file, after initialization by coff_symfile_init. */
- if (symbol)
+/* ARGSUSED */
+static void
+coff_symfile_read (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+{
+ struct coff_symfile_info *info;
+ struct dbx_symfile_info *dbxinfo;
+ bfd *abfd = objfile->obfd;
+ coff_data_type *cdata = coff_data (abfd);
+ char *name = bfd_get_filename (abfd);
+ register int val;
+ int num_symbols;
+ int symtab_offset;
+ int stringtab_offset;
+ struct cleanup *back_to;
+ int stabstrsize;
+
+ info = (struct coff_symfile_info *) objfile -> sym_private;
+ dbxinfo = objfile->sym_stab_info;
+ symfile_bfd = abfd; /* Kludge for swap routines */
+
+/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
+ num_symbols = bfd_get_symcount (abfd); /* How many syms */
+ symtab_offset = cdata->sym_filepos; /* Symbol table file offset */
+ stringtab_offset = symtab_offset + /* String table file offset */
+ num_symbols * cdata->local_symesz;
+
+ /* Set a few file-statics that give us specific information about
+ the particular COFF file format we're reading. */
+ local_linesz = cdata->local_linesz;
+ local_n_btmask = cdata->local_n_btmask;
+ local_n_btshft = cdata->local_n_btshft;
+ local_n_tmask = cdata->local_n_tmask;
+ local_n_tshift = cdata->local_n_tshift;
+ local_linesz = cdata->local_linesz;
+ local_symesz = cdata->local_symesz;
+ local_auxesz = cdata->local_auxesz;
+
+ /* Allocate space for raw symbol and aux entries, based on their
+ space requirements as reported by BFD. */
+ temp_sym = (char *) xmalloc
+ (cdata->local_symesz + cdata->local_auxesz);
+ temp_aux = temp_sym + cdata->local_symesz;
+ back_to = make_cleanup (free_current_contents, &temp_sym);
+
+ /* We need to know whether this is a PE file, because in PE files,
+ unlike standard COFF files, symbol values are stored as offsets
+ from the section address, rather than as absolute addresses.
+ FIXME: We should use BFD to read the symbol table, and thus avoid
+ this problem. */
+ pe_file = strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0;
+
+/* End of warning */
+
+ /* Read the line number table, all at once. */
+ info->min_lineno_offset = 0;
+ info->max_lineno_offset = 0;
+ bfd_map_over_sections (abfd, find_linenos, (PTR) info);
+
+ make_cleanup (free_linetab, 0);
+ val = init_lineno (abfd, info->min_lineno_offset,
+ info->max_lineno_offset - info->min_lineno_offset);
+ if (val < 0)
+ error ("\"%s\": error reading line numbers\n", name);
+
+ /* Now read the string table, all at once. */
+
+ make_cleanup (free_stringtab, 0);
+ val = init_stringtab (abfd, stringtab_offset);
+ if (val < 0)
+ error ("\"%s\": can't get string table", 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. */
+
+ coff_symtab_read ((long) symtab_offset, num_symbols, section_offsets,
+ 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);
+
+ bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info);
+
+ if (info->stabsects)
{
- SYMBOL_BLOCK_VALUE (symbol) = block;
- BLOCK_FUNCTION (block) = symbol;
+ /* FIXME: dubious. Why can't we use something normal like
+ bfd_get_section_contents? */
+ bfd_seek (abfd, abfd->where, 0);
+
+ stabstrsize = bfd_section_size (abfd, info->stabstrsect);
+
+ coffstab_build_psymtabs (objfile,
+ section_offsets,
+ mainline,
+ info->textaddr, info->textsize,
+ info->stabsects,
+ info->stabstrsect->filepos, stabstrsize);
}
- else
- BLOCK_FUNCTION (block) = 0;
- /* Now free the links of the list, and empty the list. */
+ do_cleanups (back_to);
+}
+
+static void
+coff_new_init (ignore)
+ struct objfile *ignore;
+{
+}
+
+/* Perform any local cleanups required when we are done with a particular
+ objfile. I.E, we are in the process of discarding all symbol information
+ for an objfile, freeing up all memory held for it, and unlinking the
+ objfile struct from the global list of known objfiles. */
- for (next = *listhead; next; next = next1)
+static void
+coff_symfile_finish (objfile)
+ struct objfile *objfile;
+{
+ if (objfile -> sym_private != NULL)
{
- next1 = next->next;
- free (next);
+ mfree (objfile -> md, objfile -> sym_private);
}
- *listhead = 0;
+}
- /* Install this block as the superblock
- of all blocks made since the start of this scope
- that don't have superblocks yet. */
+\f
+/* 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 (). */
- opblock = 0;
- for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
+static void
+coff_symtab_read (symtab_offset, nsyms, section_offsets, objfile)
+ long symtab_offset;
+ int nsyms;
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+{
+ register struct context_stack *new;
+ struct coff_symbol coff_symbol;
+ register struct coff_symbol *cs = &coff_symbol;
+ static struct internal_syment main_sym;
+ static union internal_auxent main_aux;
+ struct coff_symbol fcn_cs_saved;
+ static struct internal_syment fcn_sym_saved;
+ static union internal_auxent fcn_aux_saved;
+ struct symtab *s;
+ /* A .file is open. */
+ int in_source_file = 0;
+ int next_file_symnum = -1;
+ /* Name of the current file. */
+ char *filestring = "";
+ int depth = 0;
+ int fcn_first_line = 0;
+ int fcn_last_line = 0;
+ int fcn_start_addr = 0;
+ long fcn_line_ptr = 0;
+ int val;
+ CORE_ADDR tmpaddr;
+
+ /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
+ it's hard to know I've really worked around it. The fix should be
+ harmless, anyway). The symptom of the bug is that the first
+ fread (in read_one_sym), will (in my example) actually get data
+ from file offset 268, when the fseek was to 264 (and ftell shows
+ 264). This causes all hell to break loose. I was unable to
+ reproduce this on a short test program which operated on the same
+ file, performing (I think) the same sequence of operations.
+
+ It stopped happening when I put in this (former) rewind().
+
+ FIXME: Find out if this has been reported to Sun, whether it has
+ been fixed in a later release, etc. */
+
+ bfd_seek (objfile->obfd, 0, 0);
+
+ /* Position to read the symbol table. */
+ val = bfd_seek (objfile->obfd, (long) symtab_offset, 0);
+ if (val < 0)
+ perror_with_name (objfile->name);
+
+ current_objfile = objfile;
+ nlist_bfd_global = objfile->obfd;
+ nlist_nsyms_global = nsyms;
+ last_source_file = NULL;
+ memset (opaque_type_chain, 0, sizeof opaque_type_chain);
+
+ if (type_vector) /* Get rid of previous one */
+ free ((PTR) type_vector);
+ type_vector_length = 160;
+ type_vector = (struct type **)
+ xmalloc (type_vector_length * sizeof (struct type *));
+ memset (type_vector, 0, type_vector_length * sizeof (struct type *));
+
+ coff_start_symtab ();
+
+ symnum = 0;
+ while (symnum < nsyms)
{
- if (BLOCK_SUPERBLOCK (pblock->block) == 0)
- BLOCK_SUPERBLOCK (pblock->block) = block;
- opblock = pblock;
+ QUIT; /* Make this command interruptable. */
+
+ read_one_sym (cs, &main_sym, &main_aux);
+
+ if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
+ {
+ if (last_source_file)
+ coff_end_symtab (objfile);
+
+ coff_start_symtab ();
+ complete_symtab ("_globals_", 0, 0);
+ /* done with all files, everything from here on out is globals */
+ }
+
+ /* Special case for file with type declarations only, no text. */
+ if (!last_source_file && SDB_TYPE (cs->c_type)
+ && cs->c_secnum == N_DEBUG)
+ complete_symtab (filestring, 0, 0);
+
+ /* Typedefs should not be treated as symbol definitions. */
+ if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
+ {
+ /* Record all functions -- external and static -- in minsyms. */
+ tmpaddr = cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile);
+
+ fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
+ fcn_start_addr = tmpaddr;
+ fcn_cs_saved = *cs;
+ fcn_sym_saved = main_sym;
+ fcn_aux_saved = main_aux;
+ continue;
+ }
+
+ switch (cs->c_sclass)
+ {
+ case C_EFCN:
+ case C_EXTDEF:
+ case C_ULABEL:
+ case C_USTATIC:
+ case C_LINE:
+ case C_ALIAS:
+ case C_HIDDEN:
+ complain (&bad_sclass_complaint, cs->c_name);
+ break;
+
+ case C_FILE:
+ /* c_value field contains symnum of next .file entry in table
+ or symnum of first global after last .file. */
+ next_file_symnum = cs->c_value;
+ if (cs->c_naux > 0)
+ filestring = coff_getfilename (&main_aux);
+ else
+ filestring = "";
+
+ /* Complete symbol table for last object file
+ containing debugging information. */
+ if (last_source_file)
+ {
+ coff_end_symtab (objfile);
+ coff_start_symtab ();
+ }
+ in_source_file = 1;
+ break;
+
+ /* C_LABEL is used for labels and static functions. Including
+ it here allows gdb to see static functions when no debug
+ info is available. */
+ case C_LABEL:
+ case C_STAT:
+ case C_THUMBLABEL:
+ case C_THUMBSTAT:
+ case C_THUMBSTATFUNC:
+ if (cs->c_name[0] == '.')
+ {
+ if (STREQ (cs->c_name, ".text")) {
+ /* FIXME: don't wire in ".text" as section name
+ or symbol name! */
+ /* Check for in_source_file deals with case of
+ a file with debugging symbols
+ followed by a later file with no symbols. */
+ if (in_source_file)
+ complete_symtab (filestring,
+ cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT),
+ main_aux.x_scn.x_scnlen);
+ in_source_file = 0;
+ }
+ /* flush rest of '.' symbols */
+ break;
+ }
+ else if (!SDB_TYPE (cs->c_type)
+ && cs->c_name[0] == 'L'
+ && (strncmp (cs->c_name, "LI%", 3) == 0
+ || strncmp (cs->c_name, "LF%", 3) == 0
+ || strncmp (cs->c_name,"LC%",3) == 0
+ || strncmp (cs->c_name,"LP%",3) == 0
+ || strncmp (cs->c_name,"LPB%",4) == 0
+ || strncmp (cs->c_name,"LBB%",4) == 0
+ || strncmp (cs->c_name,"LBE%",4) == 0
+ || strncmp (cs->c_name,"LPBX%",5) == 0))
+ /* At least on a 3b1, gcc generates swbeg and string labels
+ that look like this. Ignore them. */
+ break;
+ /* fall in for static symbols that don't start with '.' */
+ case C_THUMBEXT:
+ case C_THUMBEXTFUNC:
+ case C_EXT:
+ {
+ /* Record it in the minimal symbols regardless of
+ SDB_TYPE. This parallels what we do for other debug
+ formats, and probably is needed to make
+ print_address_symbolic work right without the (now
+ gone) "set fast-symbolic-addr off" kludge. */
+
+ /* FIXME: should use mst_abs, and not relocate, if absolute. */
+ enum minimal_symbol_type ms_type;
+ int sec;
+
+ if (cs->c_secnum == N_UNDEF)
+ {
+ /* This is a common symbol. See if the target
+ environment knows where it has been relocated to. */
+ CORE_ADDR reladdr;
+ if (target_lookup_symbol (cs->c_name, &reladdr))
+ {
+ /* Error in lookup; ignore symbol. */
+ break;
+ }
+ tmpaddr = reladdr;
+ /* The address has already been relocated; make sure that
+ objfile_relocate doesn't relocate it again. */
+ sec = -2;
+ ms_type = cs->c_sclass == C_EXT
+ || cs->c_sclass == C_THUMBEXT ?
+ mst_bss : mst_file_bss;
+ }
+ else
+ {
+ sec = cs_to_section (cs, objfile);
+ tmpaddr = cs->c_value;
+ if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC
+ || cs->c_sclass == C_THUMBEXT)
+ tmpaddr += ANOFFSET (section_offsets, sec);
+
+ switch (sec)
+ {
+ case SECT_OFF_TEXT:
+ case SECT_OFF_RODATA:
+ ms_type =
+ cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC
+ || cs->c_sclass == C_THUMBEXT ?
+ mst_text : mst_file_text;
+#ifdef SMASH_TEXT_ADDRESS
+ if (tmpaddr & 1) /* FIXME: delete this line */
+ SMASH_TEXT_ADDRESS (tmpaddr);
+#endif
+ break;
+ case SECT_OFF_DATA:
+ ms_type =
+ cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ?
+ mst_data : mst_file_data;
+ break;
+ case SECT_OFF_BSS:
+ ms_type =
+ cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ?
+ mst_data : mst_file_data;
+ break;
+ default:
+ ms_type = mst_unknown;
+ break;
+ }
+ }
+
+ if (cs->c_name[0] != '@' /* Skip tdesc symbols */)
+ prim_record_minimal_symbol_and_info
+ (cs->c_name, tmpaddr, ms_type, (char *)cs->c_sclass, sec,
+ NULL, objfile);
+
+ if (SDB_TYPE (cs->c_type))
+ {
+ struct symbol *sym;
+ sym = process_coff_symbol
+ (cs, &main_aux, section_offsets, objfile);
+ SYMBOL_VALUE (sym) = tmpaddr;
+ SYMBOL_SECTION (sym) = sec;
+ }
+ }
+ break;
+
+ case C_FCN:
+ if (STREQ (cs->c_name, ".bf"))
+ {
+ within_function = 1;
+
+ /* value contains address of first non-init type code */
+ /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
+ contains line number of '{' } */
+ if (cs->c_naux != 1)
+ complain (&bf_no_aux_complaint, cs->c_symnum);
+ fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
+
+ /* Might want to check that locals are 0 and
+ context_stack_depth is zero, and complain if not. */
+
+ depth = 0;
+ new = push_context (depth, fcn_start_addr);
+ fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
+ new->name =
+ process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved,
+ section_offsets, objfile);
+ }
+ else if (STREQ (cs->c_name, ".ef"))
+ {
+ /* the value of .ef is the address of epilogue code;
+ not useful for gdb. */
+ /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
+ contains number of lines to '}' */
+
+ if (context_stack_depth <= 0)
+ { /* We attempted to pop an empty context stack */
+ complain (&ef_stack_complaint, cs->c_symnum);
+ within_function = 0;
+ break;
+ }
+
+ new = pop_context ();
+ /* Stack must be empty now. */
+ if (context_stack_depth > 0 || new == NULL)
+ {
+ complain (&ef_complaint, cs->c_symnum);
+ within_function = 0;
+ break;
+ }
+ if (cs->c_naux != 1)
+ {
+ complain (&ef_no_aux_complaint, cs->c_symnum);
+ fcn_last_line = 0x7FFFFFFF;
+ }
+ else
+ {
+ fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
+ }
+ enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line,
+ section_offsets);
+
+ finish_block (new->name, &local_symbols, new->old_blocks,
+ new->start_addr,
+#if defined (FUNCTION_EPILOGUE_SIZE)
+ /* This macro should be defined only on
+ machines where the
+ fcn_aux_saved.x_sym.x_misc.x_fsize
+ field is always zero.
+ So use the .bf record information that
+ points to the epilogue and add the size
+ of the epilogue. */
+ cs->c_value
+ + FUNCTION_EPILOGUE_SIZE
+ + ANOFFSET (section_offsets, SECT_OFF_TEXT),
+#else
+ fcn_cs_saved.c_value
+ + fcn_aux_saved.x_sym.x_misc.x_fsize
+ + ANOFFSET (section_offsets, SECT_OFF_TEXT),
+#endif
+ objfile
+ );
+ within_function = 0;
+ }
+ break;
+
+ case C_BLOCK:
+ if (STREQ (cs->c_name, ".bb"))
+ {
+ tmpaddr = cs->c_value;
+ tmpaddr += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ push_context (++depth, tmpaddr);
+ }
+ else if (STREQ (cs->c_name, ".eb"))
+ {
+ if (context_stack_depth <= 0)
+ { /* We attempted to pop an empty context stack */
+ complain (&eb_stack_complaint, cs->c_symnum);
+ break;
+ }
+
+ new = pop_context ();
+ if (depth-- != new->depth)
+ {
+ complain (&eb_complaint, symnum);
+ break;
+ }
+ if (local_symbols && context_stack_depth > 0)
+ {
+ tmpaddr =
+ cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ /* Make a block for the local symbols within. */
+ finish_block (0, &local_symbols, new->old_blocks,
+ new->start_addr, tmpaddr, objfile);
+ }
+ /* Now pop locals of block just finished. */
+ local_symbols = new->locals;
+ }
+ break;
+
+ default:
+ process_coff_symbol (cs, &main_aux, section_offsets, objfile);
+ break;
+ }
}
- /* 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. */
+ if (last_source_file)
+ coff_end_symtab (objfile);
+
+ /* Patch up any opaque types (references to types that are not defined
+ in the file where they are referenced, e.g. "struct foo *bar"). */
+ ALL_OBJFILE_SYMTABS (objfile, s)
+ patch_opaque_types (s);
+
+ current_objfile = NULL;
+}
+\f
+/* Routines for reading headers and symbols from executable. */
+
+/* Read the next symbol, swap it, and return it in both internal_syment
+ form, and coff_symbol form. Also return its first auxent, if any,
+ in internal_auxent form, and skip any other auxents. */
+
+static void
+read_one_sym (cs, sym, aux)
+ register struct coff_symbol *cs;
+ register struct internal_syment *sym;
+ register union internal_auxent *aux;
+{
+ int i;
- pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block));
- pblock->block = block;
- if (opblock)
+ cs->c_symnum = symnum;
+ bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global);
+ bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym);
+ cs->c_naux = sym->n_numaux & 0xff;
+ if (cs->c_naux >= 1)
{
- pblock->next = opblock->next;
- opblock->next = pblock;
+ bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global);
+ bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass,
+ 0, cs->c_naux, (char *)aux);
+ /* If more than one aux entry, read past it (only the first aux
+ is important). */
+ for (i = 1; i < cs->c_naux; i++)
+ bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global);
+ }
+ cs->c_name = getsymname (sym);
+ cs->c_value = sym->n_value;
+ cs->c_sclass = (sym->n_sclass & 0xff);
+ cs->c_secnum = sym->n_scnum;
+ cs->c_type = (unsigned) sym->n_type;
+ if (!SDB_TYPE (cs->c_type))
+ cs->c_type = 0;
+
+#if 0
+ if (cs->c_sclass & 128)
+ printf("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass);
+#endif
+
+ symnum += 1 + cs->c_naux;
+
+ /* The PE file format stores symbol values as offsets within the
+ section, rather than as absolute addresses. We correct that
+ here, if the symbol has an appropriate storage class. FIXME: We
+ should use BFD to read the symbols, rather than duplicating the
+ work here. */
+ if (pe_file)
+ {
+ switch (cs->c_sclass)
+ {
+ case C_EXT:
+ case C_THUMBEXT:
+ case C_THUMBEXTFUNC:
+ case C_SECTION:
+ case C_NT_WEAK:
+ case C_STAT:
+ case C_THUMBSTAT:
+ case C_THUMBSTATFUNC:
+ case C_LABEL:
+ case C_THUMBLABEL:
+ case C_BLOCK:
+ case C_FCN:
+ case C_EFCN:
+ if (cs->c_secnum != 0)
+ cs->c_value += cs_section_address (cs, symfile_bfd);
+ break;
+ }
+ }
+}
+\f
+/* Support for string table handling */
+
+static char *stringtab = NULL;
+
+static int
+init_stringtab (abfd, offset)
+ bfd *abfd;
+ long offset;
+{
+ long length;
+ int val;
+ unsigned char lengthbuf[4];
+
+ free_stringtab ();
+
+ /* If the file is stripped, the offset might be zero, indicating no
+ string table. Just return with `stringtab' set to null. */
+ if (offset == 0)
+ return 0;
+
+ if (bfd_seek (abfd, offset, 0) < 0)
+ return -1;
+
+ val = bfd_read ((char *)lengthbuf, sizeof lengthbuf, 1, abfd);
+ length = bfd_h_get_32 (symfile_bfd, lengthbuf);
+
+ /* If no string table is needed, then the file may end immediately
+ after the symbols. Just return with `stringtab' set to null. */
+ if (val != sizeof lengthbuf || length < sizeof lengthbuf)
+ return 0;
+
+ stringtab = (char *) xmalloc (length);
+ /* This is in target format (probably not very useful, and not currently
+ used), not host format. */
+ memcpy (stringtab, lengthbuf, sizeof lengthbuf);
+ if (length == sizeof length) /* Empty table -- just the count */
+ return 0;
+
+ val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd);
+ if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0')
+ return -1;
+
+ return 0;
+}
+
+static void
+free_stringtab ()
+{
+ if (stringtab)
+ free (stringtab);
+ stringtab = NULL;
+}
+
+static char *
+getsymname (symbol_entry)
+ struct internal_syment *symbol_entry;
+{
+ static char buffer[SYMNMLEN+1];
+ char *result;
+
+ if (symbol_entry->_n._n_n._n_zeroes == 0)
+ {
+ /* FIXME: Probably should be detecting corrupt symbol files by
+ seeing whether offset points to within the stringtab. */
+ result = stringtab + symbol_entry->_n._n_n._n_offset;
}
else
{
- pblock->next = pending_blocks;
- pending_blocks = pblock;
+ strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN);
+ buffer[SYMNMLEN] = '\0';
+ result = buffer;
}
+ return result;
}
-static struct blockvector *
-make_blockvector ()
+/* Extract the file name from the aux entry of a C_FILE symbol. Return
+ only the last component of the name. Result is in static storage and
+ is only good for temporary use. */
+
+static char *
+coff_getfilename (aux_entry)
+ union internal_auxent *aux_entry;
{
- register struct pending_block *next, *next1;
- register struct blockvector *blockvector;
- register int i;
+ static char buffer[BUFSIZ];
+ register char *temp;
+ char *result;
+
+ if (aux_entry->x_file.x_n.x_zeroes == 0)
+ strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset);
+ else
+ {
+ strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
+ buffer[FILNMLEN] = '\0';
+ }
+ result = buffer;
+
+ /* FIXME: We should not be throwing away the information about what
+ directory. It should go into dirname of the symtab, or some such
+ place. */
+ if ((temp = strrchr (result, '/')) != NULL)
+ result = temp + 1;
+ return (result);
+}
+\f
+/* 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_lineno (abfd, offset, size)
+ bfd *abfd;
+ long offset;
+ int size;
+{
+ int val;
+
+ linetab_offset = offset;
+ linetab_size = size;
+
+ free_linetab();
- /* Count the length of the list of blocks. */
+ if (size == 0)
+ return 0;
- for (next = pending_blocks, i = 0; next; next = next->next, i++);
+ if (bfd_seek (abfd, offset, 0) < 0)
+ return -1;
+
+ /* Allocate the desired table, plus a sentinel */
+ linetab = (char *) xmalloc (size + local_linesz);
- blockvector = (struct blockvector *)
- obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *));
+ val = bfd_read (linetab, size, 1, abfd);
+ if (val != size)
+ return -1;
- /* 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. */
+ /* Terminate it with an all-zero sentinel record */
+ memset (linetab + size, 0, local_linesz);
+
+ return 0;
+}
- BLOCKVECTOR_NBLOCKS (blockvector) = i;
- for (next = pending_blocks; next; next = next->next)
- BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
+static void
+free_linetab ()
+{
+ if (linetab)
+ free (linetab);
+ linetab = NULL;
+}
- /* Now free the links of the list, and empty the list. */
+#if !defined (L_LNNO32)
+#define L_LNNO32(lp) ((lp)->l_lnno)
+#endif
- for (next = pending_blocks; next; next = next1)
+static void
+enter_linenos (file_offset, first_line, last_line, section_offsets)
+ long file_offset;
+ register int first_line;
+ register int last_line;
+ struct section_offsets *section_offsets;
+{
+ register char *rawptr;
+ struct internal_lineno lptr;
+
+ if (!linetab)
+ return ;
+ if (file_offset < linetab_offset)
{
- next1 = next->next;
- free (next);
+ complain (&lineno_complaint, file_offset);
+ if (file_offset > linetab_size) /* Too big to be an offset? */
+ return;
+ file_offset += linetab_offset; /* Try reading at that linetab offset */
}
- pending_blocks = 0;
+
+ rawptr = &linetab[file_offset - linetab_offset];
+
+ /* skip first line entry for each function */
+ rawptr += local_linesz;
+ /* line numbers start at one for the first line of the function */
+ first_line--;
+
+ for (;;) {
+ bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr);
+ rawptr += local_linesz;
+ /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
+ if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line)
+ coff_record_line (first_line + L_LNNO32 (&lptr),
+ lptr.l_addr.l_paddr
+ + ANOFFSET (section_offsets, SECT_OFF_TEXT));
+ else
+ break;
+ }
+}
+\f
+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);
- return blockvector;
+ TYPE_LENGTH (target) = TYPE_LENGTH (real_target);
+ TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target);
+ TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size);
+
+ memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size);
+
+ if (TYPE_NAME (real_target))
+ {
+ if (TYPE_NAME (target))
+ free (TYPE_NAME (target));
+ TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL);
+ }
}
-/* Manage the vector of line numbers. */
+/* Patch up all appropriate typedef symbols in the opaque_type_chains
+ so that they can be used to print out opaque data structures properly. */
-static
-record_line (line, pc)
- int line;
- CORE_ADDR pc;
+static void
+patch_opaque_types (s)
+ struct symtab *s;
{
- /* Make sure line vector is big enough. */
+ register struct block *b;
+ register int i;
+ register struct symbol *real_sym;
+
+ /* Go through the per-file symbols only */
+ b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
+ for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
+ {
+ /* 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] &&
+ STREQ (name + 1, SYMBOL_NAME (sym) + 1))
+ {
+ if (prev)
+ {
+ SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
+ }
+ else
+ {
+ opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
+ }
+
+ patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym));
+
+ if (prev)
+ {
+ sym = SYMBOL_VALUE_CHAIN (prev);
+ }
+ else
+ {
+ sym = opaque_type_chain[hash];
+ }
+ }
+ else
+ {
+ prev = sym;
+ sym = SYMBOL_VALUE_CHAIN (sym);
+ }
+ }
+ }
+ }
+}
+\f
+static struct symbol *
+process_coff_symbol (cs, aux, section_offsets, objfile)
+ register struct coff_symbol *cs;
+ register union internal_auxent *aux;
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+{
+ register struct symbol *sym
+ = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
+ sizeof (struct symbol));
+ char *name;
+
+ memset (sym, 0, sizeof (struct symbol));
+ name = cs->c_name;
+ name = EXTERNAL_NAME (name, objfile->obfd);
+ SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
+ &objfile->symbol_obstack);
+
+ /* default assumptions */
+ SYMBOL_VALUE (sym) = cs->c_value;
+ SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ SYMBOL_SECTION (sym) = cs_to_section (cs, objfile);
+
+ if (ISFCN (cs->c_type))
+ {
+ SYMBOL_VALUE (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ 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 || cs->c_sclass == C_THUMBSTAT
+ || cs->c_sclass == C_THUMBSTATFUNC)
+ add_symbol_to_list (sym, &file_symbols);
+ else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT
+ || cs->c_sclass == C_THUMBEXTFUNC)
+ 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_THUMBEXT:
+ case C_THUMBEXTFUNC:
+ case C_EXT:
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
+ SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ add_symbol_to_list (sym, &global_symbols);
+ break;
+
+ case C_THUMBSTAT:
+ case C_THUMBSTATFUNC:
+ case C_STAT:
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
+ SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ 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;
+
+#ifdef C_GLBLREG /* AMD coff */
+ case C_GLBLREG:
+#endif
+ case C_REG:
+ SYMBOL_CLASS (sym) = LOC_REGISTER;
+ SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value);
+ add_symbol_to_list (sym, &local_symbols);
+ break;
+
+ case C_THUMBLABEL:
+ case C_LABEL:
+ break;
+
+ case C_ARG:
+ SYMBOL_CLASS (sym) = LOC_ARG;
+ add_symbol_to_list (sym, &local_symbols);
+#if !defined (BELIEVE_PCC_PROMOTION)
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ /* If PCC says a parameter is a short or a char,
+ aligned on an int boundary, realign it to the
+ "little end" of the int. */
+ struct type *temptype;
+ temptype = lookup_fundamental_type (current_objfile,
+ FT_INTEGER);
+ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
+ && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
+ && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype))
+ {
+ SYMBOL_VALUE (sym) +=
+ TYPE_LENGTH (temptype)
+ - TYPE_LENGTH (SYMBOL_TYPE (sym));
+ }
+ }
+#endif
+ break;
+
+ case C_REGPARM:
+ SYMBOL_CLASS (sym) = LOC_REGPARM;
+ SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value);
+ add_symbol_to_list (sym, &local_symbols);
+#if !defined (BELIEVE_PCC_PROMOTION)
+ /* FIXME: This should retain the current type, since it's just
+ a register value. gnu@adobe, 26Feb93 */
+ {
+ /* If PCC says a parameter is a short or a char,
+ it is really an int. */
+ struct type *temptype;
+ temptype =
+ lookup_fundamental_type (current_objfile, FT_INTEGER);
+ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
+ && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
+ {
+ SYMBOL_TYPE (sym) =
+ (TYPE_UNSIGNED (SYMBOL_TYPE (sym))
+ ? lookup_fundamental_type (current_objfile,
+ FT_UNSIGNED_INTEGER)
+ : temptype);
+ }
+ }
+#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)
+ {
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
+ || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
+ {
+ /* If we are giving a name to a type such as "pointer to
+ foo" or "function returning foo", we better not set
+ the TYPE_NAME. If the program contains "typedef char
+ *caddr_t;", we don't want all variables of type char
+ * to print as caddr_t. This is not just a
+ consequence of GDB's type management; CC and GCC (at
+ least through version 2.4) both output variables of
+ either type char * or caddr_t with the type
+ refering to the C_TPDEF symbol for caddr_t. If a future
+ compiler cleans this up it GDB is not ready for it
+ yet, but if it becomes ready we somehow need to
+ disable this check (without breaking the PCC/GCC2.4
+ case).
+
+ Sigh.
+
+ Fortunately, this check seems not to be necessary
+ for anything except pointers or functions. */
+ ;
+ }
+ else
+ TYPE_NAME (SYMBOL_TYPE (sym)) =
+ concat (SYMBOL_NAME (sym), NULL);
+ }
+#ifdef CXUX_TARGET
+ /* Ignore vendor section for Harris CX/UX targets. */
+ else if (cs->c_name[0] == '$')
+ break;
+#endif /* CXUX_TARGET */
+
+ /* Keep track of any type which points to empty structured type,
+ so it can be filled from a definition from another file. A
+ simple forward reference (TYPE_CODE_UNDEF) is not an
+ empty structured type, though; the forward references
+ work themselves out via the magic of coff_lookup_type. */
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR &&
+ TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 &&
+ TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) !=
+ TYPE_CODE_UNDEF)
+ {
+ register int i = hashname (SYMBOL_NAME (sym));
+
+ SYMBOL_VALUE_CHAIN (sym) = 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;
+
+ /* Some compilers try to be helpful by inventing "fake"
+ names for anonymous enums, structures, and unions, like
+ "~0fake" or ".0fake". Thanks, but no thanks... */
+ if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
+ if (SYMBOL_NAME(sym) != NULL
+ && *SYMBOL_NAME(sym) != '~'
+ && *SYMBOL_NAME(sym) != '.')
+ TYPE_TAG_NAME (SYMBOL_TYPE (sym)) =
+ concat (SYMBOL_NAME (sym), NULL);
+
+ add_symbol_to_list (sym, &file_symbols);
+ break;
+
+ default:
+ break;
+ }
+ }
+ return sym;
+}
+\f
+/* Decode a coff type specifier; return the type that is meant. */
- if (line_vector_index + 2 >= line_vector_length)
+static struct type *
+decode_type (cs, c_type, aux)
+ register struct coff_symbol *cs;
+ unsigned int c_type;
+ register union internal_auxent *aux;
+{
+ register struct type *type = 0;
+ unsigned int new_c_type;
+
+ if (c_type & ~N_BTMASK)
{
- line_vector_length *= 2;
- line_vector = (struct linetable *)
- xrealloc (line_vector, sizeof (struct linetable)
- + line_vector_length * sizeof (int));
+ 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, *index_type, *range_type;
+
+ /* Define an array type. */
+ /* auxent refers to array, not base type */
+ if (aux->x_sym.x_tagndx.l == 0)
+ cs->c_naux = 0;
+
+ /* shift the indices down */
+ dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0];
+ i = 1;
+ n = dim[0];
+ for (i = 0; *dim && i < DIMNUM - 1; i++, dim++)
+ *dim = *(dim + 1);
+ *dim = 0;
+
+ base_type = decode_type (cs, new_c_type, aux);
+ index_type = lookup_fundamental_type (current_objfile, FT_INTEGER);
+ range_type =
+ create_range_type ((struct type *) NULL, index_type, 0, n - 1);
+ type =
+ create_array_type ((struct type *) NULL, base_type, range_type);
+ }
+ return type;
}
- /* If this line is not continguous with previous one recorded,
- all lines between subsequent line and current one are same pc.
- Add one item to line vector, and if more than one line skipped,
- record a line-number entry for it. */
- if (prev_line_number > 0 && line != prev_line_number + 1)
- line_vector->item[line_vector_index++] = pc;
- if (prev_line_number < 0 || line > prev_line_number + 2)
- line_vector->item[line_vector_index++] = - line;
- prev_line_number = line;
+ /* Reference to existing type. This only occurs with the
+ struct, union, and enum types. EPI a29k coff
+ fakes us out by producing aux entries with a nonzero
+ x_tagndx for definitions of structs, unions, and enums, so we
+ have to check the c_sclass field. SCO 3.2v4 cc gets confused
+ with pointers to pointers to defined structs, and generates
+ negative x_tagndx fields. */
+ if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0)
+ {
+ if (cs->c_sclass != C_STRTAG
+ && cs->c_sclass != C_UNTAG
+ && cs->c_sclass != C_ENTAG
+ && aux->x_sym.x_tagndx.l >= 0)
+ {
+ type = coff_alloc_type (aux->x_sym.x_tagndx.l);
+ return type;
+ }
+ else
+ {
+ complain (&tagndx_bad_complaint, cs->c_name);
+ /* And fall through to decode_base_type... */
+ }
+ }
- /* Record the core address of the line. */
- line_vector->item[line_vector_index++] = pc;
+ return decode_base_type (cs, BTYPE (c_type), aux);
}
-\f
-/* 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 ()
+/* 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 union internal_auxent *aux;
{
- file_symbols = 0;
- global_symbols = 0;
- context_stack = 0;
- within_function = 0;
- last_source_file = 0;
+ if (aux->x_sym.x_tagndx.l == 0)
+ cs->c_naux = 0; /* auxent refers to function, not base type */
- /* Initialize the source file information for this file. */
+ return decode_type (cs, DECREF (c_type), aux);
+}
+\f
+/* basic C types */
- 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 (int));
+static struct type *
+decode_base_type (cs, c_type, aux)
+ register struct coff_symbol *cs;
+ unsigned int c_type;
+ register union internal_auxent *aux;
+{
+ struct type *type;
+
+ switch (c_type)
+ {
+ case T_NULL:
+ /* shows up with "void (*foo)();" structure members */
+ return lookup_fundamental_type (current_objfile, FT_VOID);
+
+#if 0
+/* DGUX actually defines both T_ARG and T_VOID to the same value. */
+#ifdef T_ARG
+ case T_ARG:
+ /* Shows up in DGUX, I think. Not sure where. */
+ return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */
+#endif
+#endif /* 0 */
+
+#ifdef T_VOID
+ case T_VOID:
+ /* Intel 960 COFF has this symbol and meaning. */
+ return lookup_fundamental_type (current_objfile, FT_VOID);
+#endif
+
+ case T_CHAR:
+ return lookup_fundamental_type (current_objfile, FT_CHAR);
+
+ case T_SHORT:
+ return lookup_fundamental_type (current_objfile, FT_SHORT);
+
+ case T_INT:
+ return lookup_fundamental_type (current_objfile, FT_INTEGER);
+
+ case T_LONG:
+ return lookup_fundamental_type (current_objfile, FT_LONG);
+
+ case T_FLOAT:
+ return lookup_fundamental_type (current_objfile, FT_FLOAT);
+
+ case T_DOUBLE:
+ return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
+
+ case T_LNGDBL:
+ return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
+
+ case T_STRUCT:
+ if (cs->c_naux != 1)
+ {
+ /* anonymous structure type */
+ type = coff_alloc_type (cs->c_symnum);
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ TYPE_NAME (type) = NULL;
+ /* This used to set the tag to "<opaque>". But I think setting it
+ to NULL is right, and the printing code can print it as
+ "struct {...}". */
+ TYPE_TAG_NAME (type) = NULL;
+ INIT_CPLUS_SPECIFIC(type);
+ TYPE_LENGTH (type) = 0;
+ TYPE_FIELDS (type) = 0;
+ TYPE_NFIELDS (type) = 0;
+ }
+ else
+ {
+ type = coff_read_struct_type (cs->c_symnum,
+ aux->x_sym.x_misc.x_lnsz.x_size,
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ }
+ return type;
+
+ case T_UNION:
+ if (cs->c_naux != 1)
+ {
+ /* anonymous union type */
+ type = coff_alloc_type (cs->c_symnum);
+ TYPE_NAME (type) = NULL;
+ /* This used to set the tag to "<opaque>". But I think setting it
+ to NULL is right, and the printing code can print it as
+ "union {...}". */
+ TYPE_TAG_NAME (type) = NULL;
+ INIT_CPLUS_SPECIFIC(type);
+ TYPE_LENGTH (type) = 0;
+ TYPE_FIELDS (type) = 0;
+ TYPE_NFIELDS (type) = 0;
+ }
+ else
+ {
+ type = coff_read_struct_type (cs->c_symnum,
+ aux->x_sym.x_misc.x_lnsz.x_size,
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ }
+ TYPE_CODE (type) = TYPE_CODE_UNION;
+ return type;
+
+ case T_ENUM:
+ if (cs->c_naux != 1)
+ {
+ /* anonymous enum type */
+ type = coff_alloc_type (cs->c_symnum);
+ TYPE_CODE (type) = TYPE_CODE_ENUM;
+ TYPE_NAME (type) = NULL;
+ /* This used to set the tag to "<opaque>". But I think setting it
+ to NULL is right, and the printing code can print it as
+ "enum {...}". */
+ TYPE_TAG_NAME (type) = NULL;
+ TYPE_LENGTH (type) = 0;
+ TYPE_FIELDS (type) = 0;
+ TYPE_NFIELDS(type) = 0;
+ }
+ else
+ {
+ type = coff_read_enum_type (cs->c_symnum,
+ aux->x_sym.x_misc.x_lnsz.x_size,
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ }
+ return type;
+
+ case T_MOE:
+ /* shouldn't show up here */
+ break;
+
+ case T_UCHAR:
+ return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
+
+ case T_USHORT:
+ return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
+
+ case T_UINT:
+ return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
+
+ case T_ULONG:
+ return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
+ }
+ complain (&unexpected_type_complaint, cs->c_name);
+ return lookup_fundamental_type (current_objfile, FT_VOID);
}
+\f
+/* This page contains subroutines of read_type. */
-/* 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. */
+/* Read the description of a structure (or union type) and return an
+ object describing the type. */
-static void
-complete_symtab (name, start_addr, size)
- char *name;
- CORE_ADDR start_addr;
- unsigned int size;
+static struct type *
+coff_read_struct_type (index, length, lastsym)
+ int index;
+ int length;
+ int lastsym;
{
- last_source_file = savestring (name, strlen (name));
- cur_src_start_addr = start_addr;
- cur_src_end_addr = start_addr + size;
+ 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;
+ struct coff_symbol member_sym;
+ register struct coff_symbol *ms = &member_sym;
+ struct internal_syment sub_sym;
+ union internal_auxent sub_aux;
+ int done = 0;
+
+ type = coff_alloc_type (index);
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ INIT_CPLUS_SPECIFIC(type);
+ TYPE_LENGTH (type) = length;
+
+ while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
+ {
+ read_one_sym (ms, &sub_sym, &sub_aux);
+ name = ms->c_name;
+ name = EXTERNAL_NAME (name, current_objfile->obfd);
+
+ 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 =
+ obsavestring (name,
+ strlen (name),
+ ¤t_objfile->symbol_obstack);
+ FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
+ FIELD_BITPOS (list->field) = 8 * ms->c_value;
+ FIELD_BITSIZE (list->field) = 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 =
+ obsavestring (name,
+ strlen (name),
+ ¤t_objfile->symbol_obstack);
+ FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
+ FIELD_BITPOS (list->field) = ms->c_value;
+ FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size;
+ nfields++;
+ break;
+
+ case C_EOS:
+ done = 1;
+ break;
+ }
+ }
+ /* Now create the vector of fields, and record how big it is. */
+
+ TYPE_NFIELDS (type) = nfields;
+ TYPE_FIELDS (type) = (struct field *)
+ TYPE_ALLOC (type, sizeof (struct field) * nfields);
+
+ /* Copy the saved-up fields into the field vector. */
+
+ for (n = nfields; list; list = list->next)
+ TYPE_FIELD (type, --n) = list->field;
+
+ return type;
}
+\f
+/* 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. */
-/* 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 sym
\ No newline at end of file
+/* ARGSUSED */
+static struct type *
+coff_read_enum_type (index, length, lastsym)
+ int index;
+ int length;
+ int lastsym;
+{
+ register struct symbol *sym;
+ register struct type *type;
+ int nsyms = 0;
+ int done = 0;
+ struct pending **symlist;
+ struct coff_symbol member_sym;
+ register struct coff_symbol *ms = &member_sym;
+ struct internal_syment sub_sym;
+ union internal_auxent sub_aux;
+ struct pending *osyms, *syms;
+ int o_nsyms;
+ register int n;
+ char *name;
+ int unsigned_enum = 1;
+
+ type = coff_alloc_type (index);
+ if (within_function)
+ symlist = &local_symbols;
+ else
+ symlist = &file_symbols;
+ osyms = *symlist;
+ o_nsyms = osyms ? osyms->nsyms : 0;
+
+ while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
+ {
+ read_one_sym (ms, &sub_sym, &sub_aux);
+ name = ms->c_name;
+ name = EXTERNAL_NAME (name, current_objfile->obfd);
+
+ switch (ms->c_sclass)
+ {
+ case C_MOE:
+ sym = (struct symbol *) obstack_alloc
+ (¤t_objfile->symbol_obstack,
+ sizeof (struct symbol));
+ memset (sym, 0, sizeof (struct symbol));
+
+ SYMBOL_NAME (sym) =
+ obsavestring (name, strlen (name),
+ ¤t_objfile->symbol_obstack);
+ 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:
+ /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
+ up the count of how many symbols to read. So stop
+ on .eos. */
+ done = 1;
+ break;
+ }
+ }
+
+ /* Now fill in the fields of the type-structure. */
+
+ if (length > 0)
+ TYPE_LENGTH (type) = length;
+ else
+ TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */
+ TYPE_CODE (type) = TYPE_CODE_ENUM;
+ TYPE_NFIELDS (type) = nsyms;
+ TYPE_FIELDS (type) = (struct field *)
+ TYPE_ALLOC (type, sizeof (struct field) * nsyms);
+
+ /* Find the symbols for the values and put them into the type.
+ The symbols can be found in the symlist that we put them on
+ to cause them to be defined. osyms contains the old value
+ of that symlist; everything up to there was defined by us. */
+ /* Note that we preserve the order of the enum constants, so
+ that in something like "enum {FOO, LAST_THING=FOO}" we print
+ FOO, not LAST_THING. */
+
+ for (syms = *symlist, n = 0; syms; syms = syms->next)
+ {
+ int j = 0;
+
+ if (syms == osyms)
+ j = o_nsyms;
+ for (; j < syms->nsyms; j++,n++)
+ {
+ struct symbol *xsym = syms->symbol[j];
+ SYMBOL_TYPE (xsym) = type;
+ TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym);
+ TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
+ if (SYMBOL_VALUE (xsym) < 0)
+ unsigned_enum = 0;
+ TYPE_FIELD_BITSIZE (type, n) = 0;
+ }
+ if (syms == osyms)
+ break;
+ }
+
+ if (unsigned_enum)
+ TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+
+ return type;
+}
+
+/* Register our ability to parse symbols for coff BFD files. */
+
+static struct sym_fns coff_sym_fns =
+{
+ bfd_target_coff_flavour,
+ coff_new_init, /* sym_new_init: init anything gbl to entire symtab */
+ coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
+ coff_symfile_read, /* sym_read: read a symbol file into symtab */
+ coff_symfile_finish, /* sym_finish: finished with file, cleanup */
+ default_symfile_offsets,
+ /* sym_offsets: xlate external to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
+
+void
+_initialize_coffread ()
+{
+ add_symtab_fns (&coff_sym_fns);
+}
projects / deliverable / binutils-gdb.git / blobdiff