| /* Read dbx symbol tables and convert to internal format, for GDB. |
| Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* This module provides three functions: dbx_symfile_init, |
| which initializes to read a symbol file; dbx_new_init, which |
| discards existing cached information when all symbols are being |
| discarded; and dbx_symfile_read, which reads a symbol table |
| from a file. |
| |
| dbx_symfile_read only does the minimum work necessary for letting the |
| user "name" things symbolically; it does not read the entire symtab. |
| Instead, it reads the external and static symbols and puts them in partial |
| symbol tables. When more extensive information is requested of a |
| file, the corresponding partial symbol table is mutated into a full |
| fledged symbol table by going back and reading the symbols |
| for real. dbx_psymtab_to_symtab() is the function that does this */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| |
| #if defined(USG) || defined(__CYGNUSCLIB__) |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #endif |
| |
| #include "obstack.h" |
| #include "gdb_stat.h" |
| #include <ctype.h> |
| #include "symtab.h" |
| #include "breakpoint.h" |
| #include "command.h" |
| #include "target.h" |
| #include "gdbcore.h" /* for bfd stuff */ |
| #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "stabsread.h" |
| #include "gdb-stabs.h" |
| #include "demangle.h" |
| #include "language.h" /* Needed inside partial-stab.h */ |
| #include "complaints.h" |
| |
| #include "aout/aout64.h" |
| #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ |
| |
| |
| /* This macro returns the size field of a minimal symbol, which is normally |
| stored in the "info" field. The macro can be overridden for specific |
| targets (e.g. MIPS16) that use the info field for other purposes. */ |
| #ifndef MSYMBOL_SIZE |
| #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym)) |
| #endif |
| |
| |
| /* We put a pointer to this structure in the read_symtab_private field |
| of the psymtab. */ |
| |
| struct symloc |
| { |
| |
| /* Offset within the file symbol table of first local symbol for this |
| file. */ |
| |
| int ldsymoff; |
| |
| /* Length (in bytes) of the section of the symbol table devoted to |
| this file's symbols (actually, the section bracketed may contain |
| more than just this file's symbols). If ldsymlen is 0, the only |
| reason for this thing's existence is the dependency list. Nothing |
| else will happen when it is read in. */ |
| |
| int ldsymlen; |
| |
| /* The size of each symbol in the symbol file (in external form). */ |
| |
| int symbol_size; |
| |
| /* Further information needed to locate the symbols if they are in |
| an ELF file. */ |
| |
| int symbol_offset; |
| int string_offset; |
| int file_string_offset; |
| }; |
| |
| #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) |
| #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) |
| #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) |
| #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) |
| #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) |
| #define STRING_OFFSET(p) (SYMLOC(p)->string_offset) |
| #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) |
| |
| |
| /* Remember what we deduced to be the source language of this psymtab. */ |
| |
| static enum language psymtab_language = language_unknown; |
| |
| /* Nonzero means give verbose info on gdb action. From main.c. */ |
| |
| extern int info_verbose; |
| |
| /* The BFD for this file -- implicit parameter to next_symbol_text. */ |
| |
| static bfd *symfile_bfd; |
| |
| /* The size of each symbol in the symbol file (in external form). |
| This is set by dbx_symfile_read when building psymtabs, and by |
| dbx_psymtab_to_symtab when building symtabs. */ |
| |
| static unsigned symbol_size; |
| |
| /* This is the offset of the symbol table in the executable file. */ |
| |
| static unsigned symbol_table_offset; |
| |
| /* This is the offset of the string table in the executable file. */ |
| |
| static unsigned string_table_offset; |
| |
| /* For elf+stab executables, the n_strx field is not a simple index |
| into the string table. Instead, each .o file has a base offset in |
| the string table, and the associated symbols contain offsets from |
| this base. The following two variables contain the base offset for |
| the current and next .o files. */ |
| |
| static unsigned int file_string_table_offset; |
| static unsigned int next_file_string_table_offset; |
| |
| /* .o and NLM files contain unrelocated addresses which are based at |
| 0. When non-zero, this flag disables some of the special cases for |
| Solaris elf+stab text addresses at location 0. */ |
| |
| static int symfile_relocatable = 0; |
| |
| /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are |
| relative to the function start address. */ |
| |
| static int block_address_function_relative = 0; |
| |
| /* The lowest text address we have yet encountered. This is needed |
| because in an a.out file, there is no header field which tells us |
| what address the program is actually going to be loaded at, so we |
| need to make guesses based on the symbols (which *are* relocated to |
| reflect the address it will be loaded at). */ |
| |
| static CORE_ADDR lowest_text_address; |
| |
| /* Non-zero if there is any line number info in the objfile. Prevents |
| end_psymtab from discarding an otherwise empty psymtab. */ |
| |
| static int has_line_numbers; |
| |
| /* Complaints about the symbols we have encountered. */ |
| |
| struct complaint lbrac_complaint = |
| {"bad block start address patched", 0, 0}; |
| |
| struct complaint string_table_offset_complaint = |
| {"bad string table offset in symbol %d", 0, 0}; |
| |
| struct complaint unknown_symtype_complaint = |
| {"unknown symbol type %s", 0, 0}; |
| |
| struct complaint unknown_symchar_complaint = |
| {"unknown symbol descriptor `%c'", 0, 0}; |
| |
| struct complaint lbrac_rbrac_complaint = |
| {"block start larger than block end", 0, 0}; |
| |
| struct complaint lbrac_unmatched_complaint = |
| {"unmatched N_LBRAC before symtab pos %d", 0, 0}; |
| |
| struct complaint lbrac_mismatch_complaint = |
| {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0}; |
| |
| struct complaint repeated_header_complaint = |
| {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0}; |
| |
| struct complaint unclaimed_bincl_complaint = |
| {"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0}; |
| |
| /* find_text_range --- find start and end of loadable code sections |
| |
| The find_text_range function finds the shortest address range that |
| encloses all sections containing executable code, and stores it in |
| objfile's text_addr and text_size members. |
| |
| dbx_symfile_read will use this to finish off the partial symbol |
| table, in some cases. */ |
| |
| static void |
| find_text_range (bfd * sym_bfd, struct objfile *objfile) |
| { |
| asection *sec; |
| int found_any = 0; |
| CORE_ADDR start, end; |
| |
| for (sec = sym_bfd->sections; sec; sec = sec->next) |
| if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE) |
| { |
| CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec); |
| CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec); |
| |
| if (found_any) |
| { |
| if (sec_start < start) |
| start = sec_start; |
| if (sec_end > end) |
| end = sec_end; |
| } |
| else |
| { |
| start = sec_start; |
| end = sec_end; |
| } |
| |
| found_any = 1; |
| } |
| |
| if (!found_any) |
| error ("Can't find any code sections in symbol file"); |
| |
| DBX_TEXT_ADDR (objfile) = start; |
| DBX_TEXT_SIZE (objfile) = end - start; |
| } |
| |
| |
| |
| /* During initial symbol readin, we need to have a structure to keep |
| track of which psymtabs have which bincls in them. This structure |
| is used during readin to setup the list of dependencies within each |
| partial symbol table. */ |
| |
| struct header_file_location |
| { |
| char *name; /* Name of header file */ |
| int instance; /* See above */ |
| struct partial_symtab *pst; /* Partial symtab that has the |
| BINCL/EINCL defs for this file */ |
| }; |
| |
| /* The actual list and controling variables */ |
| static struct header_file_location *bincl_list, *next_bincl; |
| static int bincls_allocated; |
| |
| /* Local function prototypes */ |
| |
| extern void _initialize_dbxread PARAMS ((void)); |
| |
| static void |
| process_now PARAMS ((struct objfile *)); |
| |
| static void |
| free_header_files PARAMS ((void)); |
| |
| static void |
| init_header_files PARAMS ((void)); |
| |
| static void |
| read_ofile_symtab PARAMS ((struct partial_symtab *)); |
| |
| static void |
| dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *)); |
| |
| static void |
| dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); |
| |
| static void |
| read_dbx_dynamic_symtab PARAMS ((struct objfile * objfile)); |
| |
| static void |
| read_dbx_symtab PARAMS ((struct objfile *)); |
| |
| static void |
| free_bincl_list PARAMS ((struct objfile *)); |
| |
| static struct partial_symtab * |
| find_corresponding_bincl_psymtab PARAMS ((char *, int)); |
| |
| static void |
| add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int)); |
| |
| static void |
| init_bincl_list PARAMS ((int, struct objfile *)); |
| |
| static char * |
| dbx_next_symbol_text PARAMS ((struct objfile *)); |
| |
| static void |
| fill_symbuf PARAMS ((bfd *)); |
| |
| static void |
| dbx_symfile_init PARAMS ((struct objfile *)); |
| |
| static void |
| dbx_new_init PARAMS ((struct objfile *)); |
| |
| static void |
| dbx_symfile_read PARAMS ((struct objfile *, int)); |
| |
| static void |
| dbx_symfile_finish PARAMS ((struct objfile *)); |
| |
| static void |
| record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); |
| |
| static void |
| add_new_header_file PARAMS ((char *, int)); |
| |
| static void |
| add_old_header_file PARAMS ((char *, int)); |
| |
| static void |
| add_this_object_header_file PARAMS ((int)); |
| |
| static struct partial_symtab * |
| start_psymtab PARAMS ((struct objfile *, char *, CORE_ADDR, int, |
| struct partial_symbol **, struct partial_symbol **)); |
| |
| /* Free up old header file tables */ |
| |
| static void |
| free_header_files () |
| { |
| if (this_object_header_files) |
| { |
| free ((PTR) this_object_header_files); |
| this_object_header_files = NULL; |
| } |
| n_allocated_this_object_header_files = 0; |
| } |
| |
| /* Allocate new header file tables */ |
| |
| static void |
| init_header_files () |
| { |
| n_allocated_this_object_header_files = 10; |
| this_object_header_files = (int *) xmalloc (10 * sizeof (int)); |
| } |
| |
| /* Add header file number I for this object file |
| at the next successive FILENUM. */ |
| |
| static void |
| add_this_object_header_file (i) |
| int i; |
| { |
| if (n_this_object_header_files == n_allocated_this_object_header_files) |
| { |
| n_allocated_this_object_header_files *= 2; |
| this_object_header_files |
| = (int *) xrealloc ((char *) this_object_header_files, |
| n_allocated_this_object_header_files * sizeof (int)); |
| } |
| |
| this_object_header_files[n_this_object_header_files++] = i; |
| } |
| |
| /* Add to this file an "old" header file, one already seen in |
| a previous object file. NAME is the header file's name. |
| INSTANCE is its instance code, to select among multiple |
| symbol tables for the same header file. */ |
| |
| static void |
| add_old_header_file (name, instance) |
| char *name; |
| int instance; |
| { |
| register struct header_file *p = HEADER_FILES (current_objfile); |
| register int i; |
| |
| for (i = 0; i < N_HEADER_FILES (current_objfile); i++) |
| if (STREQ (p[i].name, name) && instance == p[i].instance) |
| { |
| add_this_object_header_file (i); |
| return; |
| } |
| complain (&repeated_header_complaint, name, symnum); |
| } |
| |
| /* Add to this file a "new" header file: definitions for its types follow. |
| NAME is the header file's name. |
| Most often this happens only once for each distinct header file, |
| but not necessarily. If it happens more than once, INSTANCE has |
| a different value each time, and references to the header file |
| use INSTANCE values to select among them. |
| |
| dbx output contains "begin" and "end" markers for each new header file, |
| but at this level we just need to know which files there have been; |
| so we record the file when its "begin" is seen and ignore the "end". */ |
| |
| static void |
| add_new_header_file (name, instance) |
| char *name; |
| int instance; |
| { |
| register int i; |
| register struct header_file *hfile; |
| |
| /* Make sure there is room for one more header file. */ |
| |
| i = N_ALLOCATED_HEADER_FILES (current_objfile); |
| |
| if (N_HEADER_FILES (current_objfile) == i) |
| { |
| if (i == 0) |
| { |
| N_ALLOCATED_HEADER_FILES (current_objfile) = 10; |
| HEADER_FILES (current_objfile) = (struct header_file *) |
| xmalloc (10 * sizeof (struct header_file)); |
| } |
| else |
| { |
| i *= 2; |
| N_ALLOCATED_HEADER_FILES (current_objfile) = i; |
| HEADER_FILES (current_objfile) = (struct header_file *) |
| xrealloc ((char *) HEADER_FILES (current_objfile), |
| (i * sizeof (struct header_file))); |
| } |
| } |
| |
| /* Create an entry for this header file. */ |
| |
| i = N_HEADER_FILES (current_objfile)++; |
| hfile = HEADER_FILES (current_objfile) + i; |
| hfile->name = savestring (name, strlen (name)); |
| hfile->instance = instance; |
| hfile->length = 10; |
| hfile->vector |
| = (struct type **) xmalloc (10 * sizeof (struct type *)); |
| memset (hfile->vector, 0, 10 * sizeof (struct type *)); |
| |
| add_this_object_header_file (i); |
| } |
| |
| #if 0 |
| static struct type ** |
| explicit_lookup_type (real_filenum, index) |
| int real_filenum, index; |
| { |
| register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum]; |
| |
| if (index >= f->length) |
| { |
| f->length *= 2; |
| f->vector = (struct type **) |
| xrealloc (f->vector, f->length * sizeof (struct type *)); |
| memset (&f->vector[f->length / 2], |
| '\0', f->length * sizeof (struct type *) / 2); |
| } |
| return &f->vector[index]; |
| } |
| #endif |
| |
| static void |
| record_minimal_symbol (name, address, type, objfile) |
| char *name; |
| CORE_ADDR address; |
| int type; |
| struct objfile *objfile; |
| { |
| enum minimal_symbol_type ms_type; |
| int section; |
| asection *bfd_section; |
| |
| switch (type) |
| { |
| case N_TEXT | N_EXT: |
| ms_type = mst_text; |
| section = SECT_OFF_TEXT; |
| bfd_section = DBX_TEXT_SECTION (objfile); |
| break; |
| case N_DATA | N_EXT: |
| ms_type = mst_data; |
| section = SECT_OFF_DATA; |
| bfd_section = DBX_DATA_SECTION (objfile); |
| break; |
| case N_BSS | N_EXT: |
| ms_type = mst_bss; |
| section = SECT_OFF_BSS; |
| bfd_section = DBX_BSS_SECTION (objfile); |
| break; |
| case N_ABS | N_EXT: |
| ms_type = mst_abs; |
| section = -1; |
| bfd_section = NULL; |
| break; |
| #ifdef N_SETV |
| case N_SETV | N_EXT: |
| ms_type = mst_data; |
| section = SECT_OFF_DATA; |
| bfd_section = DBX_DATA_SECTION (objfile); |
| break; |
| case N_SETV: |
| /* I don't think this type actually exists; since a N_SETV is the result |
| of going over many .o files, it doesn't make sense to have one |
| file local. */ |
| ms_type = mst_file_data; |
| section = SECT_OFF_DATA; |
| bfd_section = DBX_DATA_SECTION (objfile); |
| break; |
| #endif |
| case N_TEXT: |
| case N_NBTEXT: |
| case N_FN: |
| case N_FN_SEQ: |
| ms_type = mst_file_text; |
| section = SECT_OFF_TEXT; |
| bfd_section = DBX_TEXT_SECTION (objfile); |
| break; |
| case N_DATA: |
| ms_type = mst_file_data; |
| |
| /* Check for __DYNAMIC, which is used by Sun shared libraries. |
| Record it as global even if it's local, not global, so |
| lookup_minimal_symbol can find it. We don't check symbol_leading_char |
| because for SunOS4 it always is '_'. */ |
| if (name[8] == 'C' && STREQ ("__DYNAMIC", name)) |
| ms_type = mst_data; |
| |
| /* Same with virtual function tables, both global and static. */ |
| { |
| char *tempstring = name; |
| if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) |
| ++tempstring; |
| if (VTBL_PREFIX_P ((tempstring))) |
| ms_type = mst_data; |
| } |
| section = SECT_OFF_DATA; |
| bfd_section = DBX_DATA_SECTION (objfile); |
| break; |
| case N_BSS: |
| ms_type = mst_file_bss; |
| section = SECT_OFF_BSS; |
| bfd_section = DBX_BSS_SECTION (objfile); |
| break; |
| default: |
| ms_type = mst_unknown; |
| section = -1; |
| bfd_section = NULL; |
| break; |
| } |
| |
| if ((ms_type == mst_file_text || ms_type == mst_text) |
| && address < lowest_text_address) |
| lowest_text_address = address; |
| |
| prim_record_minimal_symbol_and_info |
| (name, address, ms_type, NULL, section, bfd_section, objfile); |
| } |
| |
| /* Scan and build partial symbols for a symbol file. |
| We have been initialized by a call to dbx_symfile_init, which |
| put all the relevant info into a "struct dbx_symfile_info", |
| hung off the objfile structure. |
| |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). */ |
| |
| static void |
| dbx_symfile_read (objfile, mainline) |
| struct objfile *objfile; |
| int mainline; /* FIXME comments above */ |
| { |
| bfd *sym_bfd; |
| int val; |
| struct cleanup *back_to; |
| |
| sym_bfd = objfile->obfd; |
| |
| /* .o and .nlm files are relocatables with text, data and bss segs based at |
| 0. This flag disables special (Solaris stabs-in-elf only) fixups for |
| symbols with a value of 0. */ |
| |
| symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC; |
| |
| /* This is true for Solaris (and all other systems which put stabs |
| in sections, hopefully, since it would be silly to do things |
| differently from Solaris), and false for SunOS4 and other a.out |
| file formats. */ |
| block_address_function_relative = |
| ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3)) |
| || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3)) |
| || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4)) |
| || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2)) |
| || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3))); |
| |
| val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); |
| if (val < 0) |
| perror_with_name (objfile->name); |
| |
| /* If we are reinitializing, or if we have never loaded syms yet, init */ |
| if (mainline |
| || objfile->global_psymbols.size == 0 |
| || objfile->static_psymbols.size == 0) |
| init_psymbol_list (objfile, DBX_SYMCOUNT (objfile)); |
| |
| symbol_size = DBX_SYMBOL_SIZE (objfile); |
| symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); |
| |
| free_pending_blocks (); |
| back_to = make_cleanup (really_free_pendings, 0); |
| |
| init_minimal_symbol_collection (); |
| make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); |
| |
| /* Read stabs data from executable file and define symbols. */ |
| |
| read_dbx_symtab (objfile); |
| |
| /* Add the dynamic symbols. */ |
| |
| read_dbx_dynamic_symtab (objfile); |
| |
| /* Install any minimal symbols that have been collected as the current |
| minimal symbols for this objfile. */ |
| |
| install_minimal_symbols (objfile); |
| |
| do_cleanups (back_to); |
| } |
| |
| /* Initialize anything that needs initializing when a completely new |
| symbol file is specified (not just adding some symbols from another |
| file, e.g. a shared library). */ |
| |
| static void |
| dbx_new_init (ignore) |
| struct objfile *ignore; |
| { |
| stabsread_new_init (); |
| buildsym_new_init (); |
| init_header_files (); |
| } |
| |
| |
| /* dbx_symfile_init () |
| is the dbx-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 goodies. |
| |
| We read the string table into malloc'd space and stash a pointer to it. |
| |
| Since BFD doesn't know how to read debug symbols in a format-independent |
| way (and may never do so...), we have to do it ourselves. We will never |
| be called unless this is an a.out (or very similar) file. |
| FIXME, there should be a cleaner peephole into the BFD environment here. */ |
| |
| #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */ |
| |
| static void |
| dbx_symfile_init (objfile) |
| struct objfile *objfile; |
| { |
| int val; |
| bfd *sym_bfd = objfile->obfd; |
| char *name = bfd_get_filename (sym_bfd); |
| asection *text_sect; |
| unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE]; |
| |
| /* Allocate struct to keep track of the symfile */ |
| objfile->sym_stab_info = (struct dbx_symfile_info *) |
| xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); |
| memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); |
| |
| DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); |
| DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data"); |
| DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss"); |
| |
| /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
| #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) |
| #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) |
| |
| /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
| |
| DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; |
| |
| text_sect = bfd_get_section_by_name (sym_bfd, ".text"); |
| if (!text_sect) |
| error ("Can't find .text section in symbol file"); |
| DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); |
| DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); |
| |
| DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd); |
| DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); |
| DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; |
| |
| /* Read the string table and stash it away in the psymbol_obstack. It is |
| only needed as long as we need to expand psymbols into full symbols, |
| so when we blow away the psymbol the string table goes away as well. |
| Note that gdb used to use the results of attempting to malloc the |
| string table, based on the size it read, as a form of sanity check |
| for botched byte swapping, on the theory that a byte swapped string |
| table size would be so totally bogus that the malloc would fail. Now |
| that we put in on the psymbol_obstack, we can't do this since gdb gets |
| a fatal error (out of virtual memory) if the size is bogus. We can |
| however at least check to see if the size is less than the size of |
| the size field itself, or larger than the size of the entire file. |
| Note that all valid string tables have a size greater than zero, since |
| the bytes used to hold the size are included in the count. */ |
| |
| if (STRING_TABLE_OFFSET == 0) |
| { |
| /* It appears that with the existing bfd code, STRING_TABLE_OFFSET |
| will never be zero, even when there is no string table. This |
| would appear to be a bug in bfd. */ |
| DBX_STRINGTAB_SIZE (objfile) = 0; |
| DBX_STRINGTAB (objfile) = NULL; |
| } |
| else |
| { |
| val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
| if (val < 0) |
| perror_with_name (name); |
| |
| memset ((PTR) size_temp, 0, sizeof (size_temp)); |
| val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd); |
| if (val < 0) |
| { |
| perror_with_name (name); |
| } |
| else if (val == 0) |
| { |
| /* With the existing bfd code, STRING_TABLE_OFFSET will be set to |
| EOF if there is no string table, and attempting to read the size |
| from EOF will read zero bytes. */ |
| DBX_STRINGTAB_SIZE (objfile) = 0; |
| DBX_STRINGTAB (objfile) = NULL; |
| } |
| else |
| { |
| /* Read some data that would appear to be the string table size. |
| If there really is a string table, then it is probably the right |
| size. Byteswap if necessary and validate the size. Note that |
| the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some |
| random data that happened to be at STRING_TABLE_OFFSET, because |
| bfd can't tell us there is no string table, the sanity checks may |
| or may not catch this. */ |
| DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); |
| |
| if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp) |
| || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) |
| error ("ridiculous string table size (%d bytes).", |
| DBX_STRINGTAB_SIZE (objfile)); |
| |
| DBX_STRINGTAB (objfile) = |
| (char *) obstack_alloc (&objfile->psymbol_obstack, |
| DBX_STRINGTAB_SIZE (objfile)); |
| OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile)); |
| |
| /* Now read in the string table in one big gulp. */ |
| |
| val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
| if (val < 0) |
| perror_with_name (name); |
| val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, |
| sym_bfd); |
| if (val != DBX_STRINGTAB_SIZE (objfile)) |
| perror_with_name (name); |
| } |
| } |
| } |
| |
| /* Perform any local cleanups required when we are done with a particular |
| objfile. I.E, we are in the process of discarding all symbol information |
| for an objfile, freeing up all memory held for it, and unlinking the |
| objfile struct from the global list of known objfiles. */ |
| |
| static void |
| dbx_symfile_finish (objfile) |
| struct objfile *objfile; |
| { |
| if (objfile->sym_stab_info != NULL) |
| { |
| if (HEADER_FILES (objfile) != NULL) |
| { |
| register int i = N_HEADER_FILES (objfile); |
| register struct header_file *hfiles = HEADER_FILES (objfile); |
| |
| while (--i >= 0) |
| { |
| free (hfiles[i].name); |
| free (hfiles[i].vector); |
| } |
| free ((PTR) hfiles); |
| } |
| mfree (objfile->md, objfile->sym_stab_info); |
| } |
| free_header_files (); |
| } |
| |
| |
| /* Buffer for reading the symbol table entries. */ |
| static struct external_nlist symbuf[4096]; |
| static int symbuf_idx; |
| static int symbuf_end; |
| |
| /* cont_elem is used for continuing information in cfront. |
| It saves information about which types need to be fixed up and |
| completed after all the stabs are read. */ |
| struct cont_elem |
| { |
| /* sym and stabsstring for continuing information in cfront */ |
| struct symbol *sym; |
| char *stabs; |
| /* state dependancies (statics that must be preserved) */ |
| int sym_idx; |
| int sym_end; |
| int symnum; |
| int (*func) PARAMS ((struct objfile *, struct symbol *, char *)); |
| /* other state dependancies include: |
| (assumption is that these will not change since process_now FIXME!!) |
| stringtab_global |
| n_stabs |
| objfile |
| symfile_bfd */ |
| }; |
| |
| static struct cont_elem *cont_list = 0; |
| static int cont_limit = 0; |
| static int cont_count = 0; |
| |
| /* Arrange for function F to be called with arguments SYM and P later |
| in the stabs reading process. */ |
| void |
| process_later (sym, p, f) |
| struct symbol *sym; |
| char *p; |
| int (*f) PARAMS ((struct objfile *, struct symbol *, char *)); |
| { |
| |
| /* Allocate more space for the deferred list. */ |
| if (cont_count >= cont_limit - 1) |
| { |
| cont_limit += 32; /* chunk size */ |
| |
| cont_list |
| = (struct cont_elem *) xrealloc (cont_list, |
| (cont_limit |
| * sizeof (struct cont_elem))); |
| if (!cont_list) |
| error ("Virtual memory exhausted\n"); |
| } |
| |
| /* Save state variables so we can process these stabs later. */ |
| cont_list[cont_count].sym_idx = symbuf_idx; |
| cont_list[cont_count].sym_end = symbuf_end; |
| cont_list[cont_count].symnum = symnum; |
| cont_list[cont_count].sym = sym; |
| cont_list[cont_count].stabs = p; |
| cont_list[cont_count].func = f; |
| cont_count++; |
| } |
| |
| /* Call deferred funtions in CONT_LIST. */ |
| |
| static void |
| process_now (objfile) |
| struct objfile *objfile; |
| { |
| int i; |
| int save_symbuf_idx; |
| int save_symbuf_end; |
| int save_symnum; |
| struct symbol *sym; |
| char *stabs; |
| int err; |
| int (*func) PARAMS ((struct objfile *, struct symbol *, char *)); |
| |
| /* Save the state of our caller, we'll want to restore it before |
| returning. */ |
| save_symbuf_idx = symbuf_idx; |
| save_symbuf_end = symbuf_end; |
| save_symnum = symnum; |
| |
| /* Iterate over all the deferred stabs. */ |
| for (i = 0; i < cont_count; i++) |
| { |
| /* Restore the state for this deferred stab. */ |
| symbuf_idx = cont_list[i].sym_idx; |
| symbuf_end = cont_list[i].sym_end; |
| symnum = cont_list[i].symnum; |
| sym = cont_list[i].sym; |
| stabs = cont_list[i].stabs; |
| func = cont_list[i].func; |
| |
| /* Call the function to handle this deferrd stab. */ |
| err = (*func) (objfile, sym, stabs); |
| if (err) |
| error ("Internal error: unable to resolve stab.\n"); |
| } |
| |
| /* Restore our caller's state. */ |
| symbuf_idx = save_symbuf_idx; |
| symbuf_end = save_symbuf_end; |
| symnum = save_symnum; |
| cont_count = 0; |
| } |
| |
| |
| /* Name of last function encountered. Used in Solaris to approximate |
| object file boundaries. */ |
| static char *last_function_name; |
| |
| /* The address in memory of the string table of the object file we are |
| reading (which might not be the "main" object file, but might be a |
| shared library or some other dynamically loaded thing). This is |
| set by read_dbx_symtab when building psymtabs, and by |
| read_ofile_symtab when building symtabs, and is used only by |
| next_symbol_text. FIXME: If that is true, we don't need it when |
| building psymtabs, right? */ |
| static char *stringtab_global; |
| |
| /* These variables are used to control fill_symbuf when the stabs |
| symbols are not contiguous (as may be the case when a COFF file is |
| linked using --split-by-reloc). */ |
| static struct stab_section_list *symbuf_sections; |
| static unsigned int symbuf_left; |
| static unsigned int symbuf_read; |
| |
| /* Refill the symbol table input buffer |
| and set the variables that control fetching entries from it. |
| Reports an error if no data available. |
| This function can read past the end of the symbol table |
| (into the string table) but this does no harm. */ |
| |
| static void |
| fill_symbuf (sym_bfd) |
| bfd *sym_bfd; |
| { |
| unsigned int count; |
| int nbytes; |
| |
| if (symbuf_sections == NULL) |
| count = sizeof (symbuf); |
| else |
| { |
| if (symbuf_left <= 0) |
| { |
| file_ptr filepos = symbuf_sections->section->filepos; |
| if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0) |
| perror_with_name (bfd_get_filename (sym_bfd)); |
| symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section); |
| symbol_table_offset = filepos - symbuf_read; |
| symbuf_sections = symbuf_sections->next; |
| } |
| |
| count = symbuf_left; |
| if (count > sizeof (symbuf)) |
| count = sizeof (symbuf); |
| } |
| |
| nbytes = bfd_read ((PTR) symbuf, count, 1, sym_bfd); |
| if (nbytes < 0) |
| perror_with_name (bfd_get_filename (sym_bfd)); |
| else if (nbytes == 0) |
| error ("Premature end of file reading symbol table"); |
| symbuf_end = nbytes / symbol_size; |
| symbuf_idx = 0; |
| symbuf_left -= nbytes; |
| symbuf_read += nbytes; |
| } |
| |
| #define SWAP_SYMBOL(symp, abfd) \ |
| { \ |
| (symp)->n_strx = bfd_h_get_32(abfd, \ |
| (unsigned char *)&(symp)->n_strx); \ |
| (symp)->n_desc = bfd_h_get_16 (abfd, \ |
| (unsigned char *)&(symp)->n_desc); \ |
| (symp)->n_value = bfd_h_get_32 (abfd, \ |
| (unsigned char *)&(symp)->n_value); \ |
| } |
| |
| #define INTERNALIZE_SYMBOL(intern, extern, abfd) \ |
| { \ |
| (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \ |
| (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \ |
| (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \ |
| (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \ |
| } |
| |
| /* Invariant: The symbol pointed to by symbuf_idx is the first one |
| that hasn't been swapped. Swap the symbol at the same time |
| that symbuf_idx is incremented. */ |
| |
| /* dbx allows the text of a symbol name to be continued into the |
| next symbol name! When such a continuation is encountered |
| (a \ at the end of the text of a name) |
| call this function to get the continuation. */ |
| |
| static char * |
| dbx_next_symbol_text (objfile) |
| struct objfile *objfile; |
| { |
| struct internal_nlist nlist; |
| |
| if (symbuf_idx == symbuf_end) |
| fill_symbuf (symfile_bfd); |
| |
| symnum++; |
| INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd); |
| OBJSTAT (objfile, n_stabs++); |
| |
| symbuf_idx++; |
| |
| return nlist.n_strx + stringtab_global + file_string_table_offset; |
| } |
| |
| /* Initialize the list of bincls to contain none and have some |
| allocated. */ |
| |
| static void |
| init_bincl_list (number, objfile) |
| int number; |
| struct objfile *objfile; |
| { |
| bincls_allocated = number; |
| next_bincl = bincl_list = (struct header_file_location *) |
| xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location)); |
| } |
| |
| /* Add a bincl to the list. */ |
| |
| static void |
| add_bincl_to_list (pst, name, instance) |
| struct partial_symtab *pst; |
| char *name; |
| int instance; |
| { |
| if (next_bincl >= bincl_list + bincls_allocated) |
| { |
| int offset = next_bincl - bincl_list; |
| bincls_allocated *= 2; |
| bincl_list = (struct header_file_location *) |
| xmrealloc (pst->objfile->md, (char *) bincl_list, |
| bincls_allocated * sizeof (struct header_file_location)); |
| next_bincl = bincl_list + offset; |
| } |
| next_bincl->pst = pst; |
| next_bincl->instance = instance; |
| next_bincl++->name = name; |
| } |
| |
| /* Given a name, value pair, find the corresponding |
| bincl in the list. Return the partial symtab associated |
| with that header_file_location. */ |
| |
| static struct partial_symtab * |
| find_corresponding_bincl_psymtab (name, instance) |
| char *name; |
| int instance; |
| { |
| struct header_file_location *bincl; |
| |
| for (bincl = bincl_list; bincl < next_bincl; bincl++) |
| if (bincl->instance == instance |
| && STREQ (name, bincl->name)) |
| return bincl->pst; |
| |
| complain (&repeated_header_complaint, name, symnum); |
| return (struct partial_symtab *) 0; |
| } |
| |
| /* Free the storage allocated for the bincl list. */ |
| |
| static void |
| free_bincl_list (objfile) |
| struct objfile *objfile; |
| { |
| mfree (objfile->md, (PTR) bincl_list); |
| bincls_allocated = 0; |
| } |
| |
| /* Scan a SunOs dynamic symbol table for symbols of interest and |
| add them to the minimal symbol table. */ |
| |
| static void |
| read_dbx_dynamic_symtab (objfile) |
| struct objfile *objfile; |
| { |
| bfd *abfd = objfile->obfd; |
| struct cleanup *back_to; |
| int counter; |
| long dynsym_size; |
| long dynsym_count; |
| asymbol **dynsyms; |
| asymbol **symptr; |
| arelent **relptr; |
| long dynrel_size; |
| long dynrel_count; |
| arelent **dynrels; |
| CORE_ADDR sym_value; |
| char *name; |
| |
| /* Check that the symbol file has dynamic symbols that we know about. |
| bfd_arch_unknown can happen if we are reading a sun3 symbol file |
| on a sun4 host (and vice versa) and bfd is not configured |
| --with-target=all. This would trigger an assertion in bfd/sunos.c, |
| so we ignore the dynamic symbols in this case. */ |
| if (bfd_get_flavour (abfd) != bfd_target_aout_flavour |
| || (bfd_get_file_flags (abfd) & DYNAMIC) == 0 |
| || bfd_get_arch (abfd) == bfd_arch_unknown) |
| return; |
| |
| dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd); |
| if (dynsym_size < 0) |
| return; |
| |
| dynsyms = (asymbol **) xmalloc (dynsym_size); |
| back_to = make_cleanup (free, dynsyms); |
| |
| dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms); |
| if (dynsym_count < 0) |
| { |
| do_cleanups (back_to); |
| return; |
| } |
| |
| /* Enter dynamic symbols into the minimal symbol table |
| if this is a stripped executable. */ |
| if (bfd_get_symcount (abfd) <= 0) |
| { |
| symptr = dynsyms; |
| for (counter = 0; counter < dynsym_count; counter++, symptr++) |
| { |
| asymbol *sym = *symptr; |
| asection *sec; |
| int type; |
| |
| sec = bfd_get_section (sym); |
| |
| /* BFD symbols are section relative. */ |
| sym_value = sym->value + sec->vma; |
| |
| if (bfd_get_section_flags (abfd, sec) & SEC_CODE) |
| { |
| sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| type = N_TEXT; |
| } |
| else if (bfd_get_section_flags (abfd, sec) & SEC_DATA) |
| { |
| sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA); |
| type = N_DATA; |
| } |
| else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| { |
| sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS); |
| type = N_BSS; |
| } |
| else |
| continue; |
| |
| if (sym->flags & BSF_GLOBAL) |
| type |= N_EXT; |
| |
| record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value, |
| type, objfile); |
| } |
| } |
| |
| /* Symbols from shared libraries have a dynamic relocation entry |
| that points to the associated slot in the procedure linkage table. |
| We make a mininal symbol table entry with type mst_solib_trampoline |
| at the address in the procedure linkage table. */ |
| dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd); |
| if (dynrel_size < 0) |
| { |
| do_cleanups (back_to); |
| return; |
| } |
| |
| dynrels = (arelent **) xmalloc (dynrel_size); |
| make_cleanup (free, dynrels); |
| |
| dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms); |
| if (dynrel_count < 0) |
| { |
| do_cleanups (back_to); |
| return; |
| } |
| |
| for (counter = 0, relptr = dynrels; |
| counter < dynrel_count; |
| counter++, relptr++) |
| { |
| arelent *rel = *relptr; |
| CORE_ADDR address = |
| rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA); |
| |
| switch (bfd_get_arch (abfd)) |
| { |
| case bfd_arch_sparc: |
| if (rel->howto->type != RELOC_JMP_SLOT) |
| continue; |
| break; |
| case bfd_arch_m68k: |
| /* `16' is the type BFD produces for a jump table relocation. */ |
| if (rel->howto->type != 16) |
| continue; |
| |
| /* Adjust address in the jump table to point to |
| the start of the bsr instruction. */ |
| address -= 2; |
| break; |
| default: |
| continue; |
| } |
| |
| name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr); |
| prim_record_minimal_symbol (name, address, mst_solib_trampoline, |
| objfile); |
| } |
| |
| do_cleanups (back_to); |
| } |
| |
| /* Setup partial_symtab's describing each source file for which |
| debugging information is available. */ |
| |
| static void |
| read_dbx_symtab (objfile) |
| struct objfile *objfile; |
| { |
| register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */ |
| struct internal_nlist nlist; |
| CORE_ADDR text_addr; |
| int text_size; |
| |
| register char *namestring; |
| int nsl; |
| int past_first_source_file = 0; |
| CORE_ADDR last_o_file_start = 0; |
| CORE_ADDR last_function_start = 0; |
| struct cleanup *back_to; |
| bfd *abfd; |
| int textlow_not_set; |
| |
| /* Current partial symtab */ |
| struct partial_symtab *pst; |
| |
| /* List of current psymtab's include files */ |
| char **psymtab_include_list; |
| int includes_allocated; |
| int includes_used; |
| |
| /* Index within current psymtab dependency list */ |
| struct partial_symtab **dependency_list; |
| int dependencies_used, dependencies_allocated; |
| |
| text_addr = DBX_TEXT_ADDR (objfile); |
| text_size = DBX_TEXT_SIZE (objfile); |
| |
| /* FIXME. We probably want to change stringtab_global rather than add this |
| while processing every symbol entry. FIXME. */ |
| file_string_table_offset = 0; |
| next_file_string_table_offset = 0; |
| |
| stringtab_global = DBX_STRINGTAB (objfile); |
| |
| pst = (struct partial_symtab *) 0; |
| |
| includes_allocated = 30; |
| includes_used = 0; |
| psymtab_include_list = (char **) alloca (includes_allocated * |
| sizeof (char *)); |
| |
| dependencies_allocated = 30; |
| dependencies_used = 0; |
| dependency_list = |
| (struct partial_symtab **) alloca (dependencies_allocated * |
| sizeof (struct partial_symtab *)); |
| |
| /* Init bincl list */ |
| init_bincl_list (20, objfile); |
| back_to = make_cleanup ((make_cleanup_func) free_bincl_list, objfile); |
| |
| last_source_file = NULL; |
| |
| lowest_text_address = (CORE_ADDR) -1; |
| |
| symfile_bfd = objfile->obfd; /* For next_text_symbol */ |
| abfd = objfile->obfd; |
| symbuf_end = symbuf_idx = 0; |
| next_symbol_text_func = dbx_next_symbol_text; |
| textlow_not_set = 1; |
| has_line_numbers = 0; |
| |
| for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) |
| { |
| /* Get the symbol for this run and pull out some info */ |
| QUIT; /* allow this to be interruptable */ |
| if (symbuf_idx == symbuf_end) |
| fill_symbuf (abfd); |
| bufp = &symbuf[symbuf_idx++]; |
| |
| /* |
| * Special case to speed up readin. |
| */ |
| if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE) |
| { |
| has_line_numbers = 1; |
| continue; |
| } |
| |
| INTERNALIZE_SYMBOL (nlist, bufp, abfd); |
| OBJSTAT (objfile, n_stabs++); |
| |
| /* Ok. There is a lot of code duplicated in the rest of this |
| switch statement (for efficiency reasons). Since I don't |
| like duplicating code, I will do my penance here, and |
| describe the code which is duplicated: |
| |
| *) The assignment to namestring. |
| *) The call to strchr. |
| *) The addition of a partial symbol the the two partial |
| symbol lists. This last is a large section of code, so |
| I've imbedded it in the following macro. |
| */ |
| |
| /* Set namestring based on nlist. If the string table index is invalid, |
| give a fake name, and print a single error message per symbol file read, |
| rather than abort the symbol reading or flood the user with messages. */ |
| |
| /*FIXME: Too many adds and indirections in here for the inner loop. */ |
| #define SET_NAMESTRING()\ |
| if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \ |
| DBX_STRINGTAB_SIZE (objfile)) { \ |
| complain (&string_table_offset_complaint, symnum); \ |
| namestring = "<bad string table offset>"; \ |
| } else \ |
| namestring = CUR_SYMBOL_STRX + file_string_table_offset + \ |
| DBX_STRINGTAB (objfile) |
| |
| #define CUR_SYMBOL_TYPE nlist.n_type |
| #define CUR_SYMBOL_VALUE nlist.n_value |
| #define CUR_SYMBOL_STRX nlist.n_strx |
| #define DBXREAD_ONLY |
| #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\ |
| start_psymtab(ofile, fname, low, symoff, global_syms, static_syms) |
| #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\ |
| end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set) |
| |
| #include "partial-stab.h" |
| } |
| |
| /* If there's stuff to be cleaned up, clean it up. */ |
| if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */ |
| /*FIXME, does this have a bug at start address 0? */ |
| && last_o_file_start |
| && objfile->ei.entry_point < nlist.n_value |
| && objfile->ei.entry_point >= last_o_file_start) |
| { |
| objfile->ei.entry_file_lowpc = last_o_file_start; |
| objfile->ei.entry_file_highpc = nlist.n_value; |
| } |
| |
| if (pst) |
| { |
| /* Don't set pst->texthigh lower than it already is. */ |
| CORE_ADDR text_end = |
| (lowest_text_address == (CORE_ADDR) -1 |
| ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT)) |
| : lowest_text_address) |
| + text_size; |
| |
| end_psymtab (pst, psymtab_include_list, includes_used, |
| symnum * symbol_size, |
| text_end > pst->texthigh ? text_end : pst->texthigh, |
| dependency_list, dependencies_used, textlow_not_set); |
| } |
| |
| do_cleanups (back_to); |
| } |
| |
| /* Allocate and partially fill a partial symtab. It will be |
| completely filled at the end of the symbol list. |
| |
| SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| is the address relative to which its symbols are (incremental) or 0 |
| (normal). */ |
| |
| |
| static struct partial_symtab * |
| start_psymtab (objfile, filename, textlow, ldsymoff, global_syms, static_syms) |
| struct objfile *objfile; |
| char *filename; |
| CORE_ADDR textlow; |
| int ldsymoff; |
| struct partial_symbol **global_syms; |
| struct partial_symbol **static_syms; |
| { |
| struct partial_symtab *result = |
| start_psymtab_common (objfile, objfile->section_offsets, |
| filename, textlow, global_syms, static_syms); |
| |
| result->read_symtab_private = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); |
| LDSYMOFF (result) = ldsymoff; |
| result->read_symtab = dbx_psymtab_to_symtab; |
| SYMBOL_SIZE (result) = symbol_size; |
| SYMBOL_OFFSET (result) = symbol_table_offset; |
| STRING_OFFSET (result) = string_table_offset; |
| FILE_STRING_OFFSET (result) = file_string_table_offset; |
| |
| /* If we're handling an ELF file, drag some section-relocation info |
| for this source file out of the ELF symbol table, to compensate for |
| Sun brain death. This replaces the section_offsets in this psymtab, |
| if successful. */ |
| elfstab_offset_sections (objfile, result); |
| |
| /* Deduce the source language from the filename for this psymtab. */ |
| psymtab_language = deduce_language_from_filename (filename); |
| |
| return result; |
| } |
| |
| /* Close off the current usage of PST. |
| Returns PST or NULL if the partial symtab was empty and thrown away. |
| |
| FIXME: List variables and peculiarities of same. */ |
| |
| struct partial_symtab * |
| end_psymtab (pst, include_list, num_includes, capping_symbol_offset, |
| capping_text, dependency_list, number_dependencies, textlow_not_set) |
| struct partial_symtab *pst; |
| char **include_list; |
| int num_includes; |
| int capping_symbol_offset; |
| CORE_ADDR capping_text; |
| struct partial_symtab **dependency_list; |
| int number_dependencies; |
| int textlow_not_set; |
| { |
| int i; |
| struct objfile *objfile = pst->objfile; |
| |
| if (capping_symbol_offset != -1) |
| LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst); |
| pst->texthigh = capping_text; |
| |
| #ifdef SOFUN_ADDRESS_MAYBE_MISSING |
| /* Under Solaris, the N_SO symbols always have a value of 0, |
| instead of the usual address of the .o file. Therefore, |
| we have to do some tricks to fill in texthigh and textlow. |
| The first trick is in partial-stab.h: if we see a static |
| or global function, and the textlow for the current pst |
| is not set (ie: textlow_not_set), then we use that function's |
| address for the textlow of the pst. */ |
| |
| /* Now, to fill in texthigh, we remember the last function seen |
| in the .o file (also in partial-stab.h). Also, there's a hack in |
| bfd/elf.c and gdb/elfread.c to pass the ELF st_size field |
| to here via the misc_info field. Therefore, we can fill in |
| a reliable texthigh by taking the address plus size of the |
| last function in the file. */ |
| |
| if (pst->texthigh == 0 && last_function_name) |
| { |
| char *p; |
| int n; |
| struct minimal_symbol *minsym; |
| |
| p = strchr (last_function_name, ':'); |
| if (p == NULL) |
| p = last_function_name; |
| n = p - last_function_name; |
| p = alloca (n + 2); |
| strncpy (p, last_function_name, n); |
| p[n] = 0; |
| |
| minsym = lookup_minimal_symbol (p, pst->filename, objfile); |
| if (minsym == NULL) |
| { |
| /* Sun Fortran appends an underscore to the minimal symbol name, |
| try again with an appended underscore if the minimal symbol |
| was not found. */ |
| p[n] = '_'; |
| p[n + 1] = 0; |
| minsym = lookup_minimal_symbol (p, pst->filename, objfile); |
| } |
| |
| if (minsym) |
| pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym); |
| |
| last_function_name = NULL; |
| } |
| |
| /* this test will be true if the last .o file is only data */ |
| if (textlow_not_set) |
| pst->textlow = pst->texthigh; |
| else |
| { |
| struct partial_symtab *p1; |
| |
| /* If we know our own starting text address, then walk through all other |
| psymtabs for this objfile, and if any didn't know their ending text |
| address, set it to our starting address. Take care to not set our |
| own ending address to our starting address, nor to set addresses on |
| `dependency' files that have both textlow and texthigh zero. */ |
| |
| ALL_OBJFILE_PSYMTABS (objfile, p1) |
| { |
| if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) |
| { |
| p1->texthigh = pst->textlow; |
| /* if this file has only data, then make textlow match texthigh */ |
| if (p1->textlow == 0) |
| p1->textlow = p1->texthigh; |
| } |
| } |
| } |
| |
| /* End of kludge for patching Solaris textlow and texthigh. */ |
| #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */ |
| |
| pst->n_global_syms = |
| objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
| pst->n_static_syms = |
| objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
| |
| pst->number_of_dependencies = number_dependencies; |
| if (number_dependencies) |
| { |
| pst->dependencies = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| memcpy (pst->dependencies, dependency_list, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| } |
| else |
| pst->dependencies = 0; |
| |
| for (i = 0; i < num_includes; i++) |
| { |
| struct partial_symtab *subpst = |
| allocate_psymtab (include_list[i], objfile); |
| |
| subpst->section_offsets = pst->section_offsets; |
| subpst->read_symtab_private = |
| (char *) obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct symloc)); |
| LDSYMOFF (subpst) = |
| LDSYMLEN (subpst) = |
| subpst->textlow = |
| subpst->texthigh = 0; |
| |
| /* We could save slight bits of space by only making one of these, |
| shared by the entire set of include files. FIXME-someday. */ |
| subpst->dependencies = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct partial_symtab *)); |
| subpst->dependencies[0] = pst; |
| subpst->number_of_dependencies = 1; |
| |
| subpst->globals_offset = |
| subpst->n_global_syms = |
| subpst->statics_offset = |
| subpst->n_static_syms = 0; |
| |
| subpst->readin = 0; |
| subpst->symtab = 0; |
| subpst->read_symtab = pst->read_symtab; |
| } |
| |
| sort_pst_symbols (pst); |
| |
| /* If there is already a psymtab or symtab for a file of this name, remove it. |
| (If there is a symtab, more drastic things also happen.) |
| This happens in VxWorks. */ |
| free_named_symtabs (pst->filename); |
| |
| if (num_includes == 0 |
| && number_dependencies == 0 |
| && pst->n_global_syms == 0 |
| && pst->n_static_syms == 0 |
| && has_line_numbers == 0) |
| { |
| /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| it is on the obstack, but we can forget to chain it on the list. */ |
| /* Empty psymtabs happen as a result of header files which don't have |
| any symbols in them. There can be a lot of them. But this check |
| is wrong, in that a psymtab with N_SLINE entries but nothing else |
| is not empty, but we don't realize that. Fixing that without slowing |
| things down might be tricky. */ |
| |
| discard_psymtab (pst); |
| |
| /* Indicate that psymtab was thrown away. */ |
| pst = (struct partial_symtab *) NULL; |
| } |
| return pst; |
| } |
| |
| static void |
| dbx_psymtab_to_symtab_1 (pst) |
| struct partial_symtab *pst; |
| { |
| struct cleanup *old_chain; |
| int i; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| /* Read in all partial symtabs on which this one is dependent */ |
| for (i = 0; i < pst->number_of_dependencies; i++) |
| if (!pst->dependencies[i]->readin) |
| { |
| /* Inform about additional files that need to be read in. */ |
| if (info_verbose) |
| { |
| fputs_filtered (" ", gdb_stdout); |
| wrap_here (""); |
| fputs_filtered ("and ", gdb_stdout); |
| wrap_here (""); |
| printf_filtered ("%s...", pst->dependencies[i]->filename); |
| wrap_here (""); /* Flush output */ |
| gdb_flush (gdb_stdout); |
| } |
| dbx_psymtab_to_symtab_1 (pst->dependencies[i]); |
| } |
| |
| if (LDSYMLEN (pst)) /* Otherwise it's a dummy */ |
| { |
| /* Init stuff necessary for reading in symbols */ |
| stabsread_init (); |
| buildsym_init (); |
| old_chain = make_cleanup (really_free_pendings, 0); |
| file_string_table_offset = FILE_STRING_OFFSET (pst); |
| symbol_size = SYMBOL_SIZE (pst); |
| |
| /* Read in this file's symbols */ |
| bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET); |
| read_ofile_symtab (pst); |
| sort_symtab_syms (pst->symtab); |
| |
| do_cleanups (old_chain); |
| } |
| |
| pst->readin = 1; |
| } |
| |
| /* Read in all of the symbols for a given psymtab for real. |
| Be verbose about it if the user wants that. */ |
| |
| static void |
| dbx_psymtab_to_symtab (pst) |
| struct partial_symtab *pst; |
| { |
| bfd *sym_bfd; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| if (LDSYMLEN (pst) || pst->number_of_dependencies) |
| { |
| /* Print the message now, before reading the string table, |
| to avoid disconcerting pauses. */ |
| if (info_verbose) |
| { |
| printf_filtered ("Reading in symbols for %s...", pst->filename); |
| gdb_flush (gdb_stdout); |
| } |
| |
| sym_bfd = pst->objfile->obfd; |
| |
| next_symbol_text_func = dbx_next_symbol_text; |
| |
| dbx_psymtab_to_symtab_1 (pst); |
| |
| /* Match with global symbols. This only needs to be done once, |
| after all of the symtabs and dependencies have been read in. */ |
| scan_file_globals (pst->objfile); |
| |
| /* Finish up the debug error message. */ |
| if (info_verbose) |
| printf_filtered ("done.\n"); |
| } |
| } |
| |
| /* Read in a defined section of a specific object file's symbols. */ |
| |
| static void |
| read_ofile_symtab (pst) |
| struct partial_symtab *pst; |
| { |
| register char *namestring; |
| register struct external_nlist *bufp; |
| struct internal_nlist nlist; |
| unsigned char type; |
| unsigned max_symnum; |
| register bfd *abfd; |
| struct objfile *objfile; |
| int sym_offset; /* Offset to start of symbols to read */ |
| int sym_size; /* Size of symbols to read */ |
| CORE_ADDR text_offset; /* Start of text segment for symbols */ |
| int text_size; /* Size of text segment for symbols */ |
| struct section_offsets *section_offsets; |
| |
| objfile = pst->objfile; |
| sym_offset = LDSYMOFF (pst); |
| sym_size = LDSYMLEN (pst); |
| text_offset = pst->textlow; |
| text_size = pst->texthigh - pst->textlow; |
| section_offsets = pst->section_offsets; |
| |
| current_objfile = objfile; |
| subfile_stack = NULL; |
| |
| stringtab_global = DBX_STRINGTAB (objfile); |
| last_source_file = NULL; |
| |
| abfd = objfile->obfd; |
| symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ |
| symbuf_end = symbuf_idx = 0; |
| |
| /* It is necessary to actually read one symbol *before* the start |
| of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL |
| occurs before the N_SO symbol. |
| |
| Detecting this in read_dbx_symtab |
| would slow down initial readin, so we look for it here instead. */ |
| if (!processing_acc_compilation && sym_offset >= (int) symbol_size) |
| { |
| bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR); |
| fill_symbuf (abfd); |
| bufp = &symbuf[symbuf_idx++]; |
| INTERNALIZE_SYMBOL (nlist, bufp, abfd); |
| OBJSTAT (objfile, n_stabs++); |
| |
| SET_NAMESTRING (); |
| |
| processing_gcc_compilation = 0; |
| if (nlist.n_type == N_TEXT) |
| { |
| const char *tempstring = namestring; |
| |
| if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 1; |
| else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 2; |
| if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd)) |
| ++tempstring; |
| if (STREQN (tempstring, "__gnu_compiled", 14)) |
| processing_gcc_compilation = 2; |
| } |
| |
| /* Try to select a C++ demangling based on the compilation unit |
| producer. */ |
| |
| if (processing_gcc_compilation) |
| { |
| if (AUTO_DEMANGLING) |
| { |
| set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| } |
| } |
| } |
| else |
| { |
| /* The N_SO starting this symtab is the first symbol, so we |
| better not check the symbol before it. I'm not this can |
| happen, but it doesn't hurt to check for it. */ |
| bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); |
| processing_gcc_compilation = 0; |
| } |
| |
| if (symbuf_idx == symbuf_end) |
| fill_symbuf (abfd); |
| bufp = &symbuf[symbuf_idx]; |
| if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO) |
| error ("First symbol in segment of executable not a source symbol"); |
| |
| max_symnum = sym_size / symbol_size; |
| |
| for (symnum = 0; |
| symnum < max_symnum; |
| symnum++) |
| { |
| QUIT; /* Allow this to be interruptable */ |
| if (symbuf_idx == symbuf_end) |
| fill_symbuf (abfd); |
| bufp = &symbuf[symbuf_idx++]; |
| INTERNALIZE_SYMBOL (nlist, bufp, abfd); |
| OBJSTAT (objfile, n_stabs++); |
| |
| type = bfd_h_get_8 (abfd, bufp->e_type); |
| |
| SET_NAMESTRING (); |
| |
| if (type & N_STAB) |
| { |
| process_one_symbol (type, nlist.n_desc, nlist.n_value, |
| namestring, section_offsets, objfile); |
| } |
| /* We skip checking for a new .o or -l file; that should never |
| happen in this routine. */ |
| else if (type == N_TEXT) |
| { |
| /* I don't think this code will ever be executed, because |
| the GCC_COMPILED_FLAG_SYMBOL usually is right before |
| the N_SO symbol which starts this source file. |
| However, there is no reason not to accept |
| the GCC_COMPILED_FLAG_SYMBOL anywhere. */ |
| |
| if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 1; |
| else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 2; |
| |
| if (AUTO_DEMANGLING) |
| { |
| set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| } |
| } |
| else if (type & N_EXT || type == (unsigned char) N_TEXT |
| || type == (unsigned char) N_NBTEXT |
| ) |
| { |
| /* Global symbol: see if we came across a dbx defintion for |
| a corresponding symbol. If so, store the value. Remove |
| syms from the chain when their values are stored, but |
| search the whole chain, as there may be several syms from |
| different files with the same name. */ |
| /* This is probably not true. Since the files will be read |
| in one at a time, each reference to a global symbol will |
| be satisfied in each file as it appears. So we skip this |
| section. */ |
| ; |
| } |
| } |
| |
| current_objfile = NULL; |
| |
| /* In a Solaris elf file, this variable, which comes from the |
| value of the N_SO symbol, will still be 0. Luckily, text_offset, |
| which comes from pst->textlow is correct. */ |
| if (last_source_start_addr == 0) |
| last_source_start_addr = text_offset; |
| |
| /* In reordered executables last_source_start_addr may not be the |
| lower bound for this symtab, instead use text_offset which comes |
| from pst->textlow which is correct. */ |
| if (last_source_start_addr > text_offset) |
| last_source_start_addr = text_offset; |
| |
| pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT); |
| |
| /* Process items which we had to "process_later" due to dependancies |
| on other stabs. */ |
| process_now (objfile); |
| |
| end_stabs (); |
| } |
| |
| |
| /* This handles a single symbol from the symbol-file, building symbols |
| into a GDB symtab. It takes these arguments and an implicit argument. |
| |
| TYPE is the type field of the ".stab" symbol entry. |
| DESC is the desc field of the ".stab" entry. |
| VALU is the value field of the ".stab" entry. |
| NAME is the symbol name, in our address space. |
| SECTION_OFFSETS is a set of amounts by which the sections of this object |
| file were relocated when it was loaded into memory. |
| All symbols that refer |
| to memory locations need to be offset by these amounts. |
| OBJFILE is the object file from which we are reading symbols. |
| It is used in end_symtab. */ |
| |
| void |
| process_one_symbol (type, desc, valu, name, section_offsets, objfile) |
| int type, desc; |
| CORE_ADDR valu; |
| char *name; |
| struct section_offsets *section_offsets; |
| struct objfile *objfile; |
| { |
| #ifdef SUN_FIXED_LBRAC_BUG |
| /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need |
| to correct the address of N_LBRAC's. If it is not defined, then |
| we never need to correct the addresses. */ |
| |
| /* This records the last pc address we've seen. We depend on there being |
| an SLINE or FUN or SO before the first LBRAC, since the variable does |
| not get reset in between reads of different symbol files. */ |
| static CORE_ADDR last_pc_address; |
| #endif |
| |
| register struct context_stack *new; |
| /* This remembers the address of the start of a function. It is used |
| because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are |
| relative to the current function's start address. On systems |
| other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is |
| used to relocate these symbol types rather than SECTION_OFFSETS. */ |
| static CORE_ADDR function_start_offset; |
| |
| /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source |
| file. Used to detect the SunPRO solaris compiler. */ |
| static int n_opt_found; |
| |
| /* The stab type used for the definition of the last function. |
| N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ |
| static int function_stab_type = 0; |
| |
| if (!block_address_function_relative) |
| /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the |
| function start address, so just use the text offset. */ |
| function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| |
| /* Something is wrong if we see real data before |
| seeing a source file name. */ |
| |
| if (last_source_file == NULL && type != (unsigned char) N_SO) |
| { |
| /* Ignore any symbols which appear before an N_SO symbol. |
| Currently no one puts symbols there, but we should deal |
| gracefully with the case. A complain()t might be in order, |
| but this should not be an error (). */ |
| return; |
| } |
| |
| switch (type) |
| { |
| case N_FUN: |
| case N_FNAME: |
| |
| if (*name == '\000') |
| { |
| /* This N_FUN marks the end of a function. This closes off the |
| current block. */ |
| within_function = 0; |
| new = pop_context (); |
| |
| /* Make a block for the local symbols within. */ |
| finish_block (new->name, &local_symbols, new->old_blocks, |
| new->start_addr, new->start_addr + valu, |
| objfile); |
| |
| /* May be switching to an assembler file which may not be using |
| block relative stabs, so reset the offset. */ |
| if (block_address_function_relative) |
| function_start_offset = 0; |
| |
| break; |
| } |
| |
| /* Relocate for dynamic loading */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (valu); |
| #endif |
| goto define_a_symbol; |
| |
| case N_LBRAC: |
| /* This "symbol" just indicates the start of an inner lexical |
| context within a function. */ |
| |
| /* Ignore extra outermost context from SunPRO cc and acc. */ |
| if (n_opt_found && desc == 1) |
| break; |
| |
| if (block_address_function_relative) |
| /* Relocate for Sun ELF acc fn-relative syms. */ |
| valu += function_start_offset; |
| else |
| /* On most machines, the block addresses are relative to the |
| N_SO, the linker did not relocate them (sigh). */ |
| valu += last_source_start_addr; |
| |
| #ifdef SUN_FIXED_LBRAC_BUG |
| if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) |
| { |
| /* Patch current LBRAC pc value to match last handy pc value */ |
| complain (&lbrac_complaint); |
| valu = last_pc_address; |
| } |
| #endif |
| new = push_context (desc, valu); |
| break; |
| |
| case N_RBRAC: |
| /* This "symbol" just indicates the end of an inner lexical |
| context that was started with N_LBRAC. */ |
| |
| /* Ignore extra outermost context from SunPRO cc and acc. */ |
| if (n_opt_found && desc == 1) |
| break; |
| |
| if (block_address_function_relative) |
| /* Relocate for Sun ELF acc fn-relative syms. */ |
| valu += function_start_offset; |
| else |
| /* On most machines, the block addresses are relative to the |
| N_SO, the linker did not relocate them (sigh). */ |
| valu += last_source_start_addr; |
| |
| new = pop_context (); |
| if (desc != new->depth) |
| complain (&lbrac_mismatch_complaint, symnum); |
| |
| /* Some compilers put the variable decls inside of an |
| LBRAC/RBRAC block. This macro should be nonzero if this |
| is true. DESC is N_DESC from the N_RBRAC symbol. |
| GCC_P is true if we've detected the GCC_COMPILED_SYMBOL |
| or the GCC2_COMPILED_SYMBOL. */ |
| #if !defined (VARIABLES_INSIDE_BLOCK) |
| #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 |
| #endif |
| |
| /* Can only use new->locals as local symbols here if we're in |
| gcc or on a machine that puts them before the lbrack. */ |
| if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) |
| local_symbols = new->locals; |
| |
| if (context_stack_depth |
| > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) |
| { |
| /* This is not the outermost LBRAC...RBRAC pair in the function, |
| its local symbols preceded it, and are the ones just recovered |
| from the context stack. Define the block for them (but don't |
| bother if the block contains no symbols. Should we complain |
| on blocks without symbols? I can't think of any useful purpose |
| for them). */ |
| if (local_symbols != NULL) |
| { |
| /* Muzzle a compiler bug that makes end < start. (which |
| compilers? Is this ever harmful?). */ |
| if (new->start_addr > valu) |
| { |
| complain (&lbrac_rbrac_complaint); |
| new->start_addr = valu; |
| } |
| /* Make a block for the local symbols within. */ |
| finish_block (0, &local_symbols, new->old_blocks, |
| new->start_addr, valu, objfile); |
| } |
| } |
| else |
| { |
| /* This is the outermost LBRAC...RBRAC pair. There is no |
| need to do anything; leave the symbols that preceded it |
| to be attached to the function's own block. We need to |
| indicate that we just moved outside of the function. */ |
| within_function = 0; |
| } |
| |
| if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) |
| /* Now pop locals of block just finished. */ |
| local_symbols = new->locals; |
| break; |
| |
| case N_FN: |
| case N_FN_SEQ: |
| /* This kind of symbol indicates the start of an object file. */ |
| /* Relocate for dynamic loading */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| break; |
| |
| case N_SO: |
| /* This type of symbol indicates the start of data |
| for one source file. |
| Finish the symbol table of the previous source file |
| (if any) and start accumulating a new symbol table. */ |
| /* Relocate for dynamic loading */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| |
| n_opt_found = 0; |
| |
| #ifdef SUN_FIXED_LBRAC_BUG |
| last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| #endif |
| |
| #ifdef PCC_SOL_BROKEN |
| /* pcc bug, occasionally puts out SO for SOL. */ |
| if (context_stack_depth > 0) |
| { |
| start_subfile (name, NULL); |
| break; |
| } |
| #endif |
| if (last_source_file) |
| { |
| /* Check if previous symbol was also an N_SO (with some |
| sanity checks). If so, that one was actually the directory |
| name, and the current one is the real file name. |
| Patch things up. */ |
| if (previous_stab_code == (unsigned char) N_SO) |
| { |
| patch_subfile_names (current_subfile, name); |
| break; /* Ignore repeated SOs */ |
| } |
| end_symtab (valu, objfile, SECT_OFF_TEXT); |
| end_stabs (); |
| } |
| |
| /* Null name means this just marks the end of text for this .o file. |
| Don't start a new symtab in this case. */ |
| if (*name == '\000') |
| break; |
| |
| if (block_address_function_relative) |
| function_start_offset = 0; |
| |
| start_stabs (); |
| start_symtab (name, NULL, valu); |
| record_debugformat ("stabs"); |
| break; |
| |
| case N_SOL: |
| /* This type of symbol indicates the start of data for |
| a sub-source-file, one whose contents were copied or |
| included in the compilation of the main source file |
| (whose name was given in the N_SO symbol.) */ |
| /* Relocate for dynamic loading */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| start_subfile (name, current_subfile->dirname); |
| break; |
| |
| case N_BINCL: |
| push_subfile (); |
| add_new_header_file (name, valu); |
| start_subfile (name, current_subfile->dirname); |
| break; |
| |
| case N_EINCL: |
| start_subfile (pop_subfile (), current_subfile->dirname); |
| break; |
| |
| case N_EXCL: |
| add_old_header_file (name, valu); |
| break; |
| |
| case N_SLINE: |
| /* This type of "symbol" really just records |
| one line-number -- core-address correspondence. |
| Enter it in the line list for this symbol table. */ |
| |
| /* Relocate for dynamic loading and for ELF acc fn-relative syms. */ |
| valu += function_start_offset; |
| |
| #ifdef SUN_FIXED_LBRAC_BUG |
| last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| #endif |
| record_line (current_subfile, desc, valu); |
| break; |
| |
| case N_BCOMM: |
| common_block_start (name, objfile); |
| break; |
| |
| case N_ECOMM: |
| common_block_end (objfile); |
| break; |
| |
| /* The following symbol types need to have the appropriate offset added |
| to their value; then we process symbol definitions in the name. */ |
| |
| case N_STSYM: /* Static symbol in data seg */ |
| case N_LCSYM: /* Static symbol in BSS seg */ |
| case N_ROSYM: /* Static symbol in Read-only data seg */ |
| /* HORRID HACK DEPT. However, it's Sun's furgin' fault. |
| Solaris2's stabs-in-elf makes *most* symbols relative |
| but leaves a few absolute (at least for Solaris 2.1 and version |
| 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence. |
| .stab "foo:S...",N_STSYM is absolute (ld relocates it) |
| .stab "foo:V...",N_STSYM is relative (section base subtracted). |
| This leaves us no choice but to search for the 'S' or 'V'... |
| (or pass the whole section_offsets stuff down ONE MORE function |
| call level, which we really don't want to do). */ |
| { |
| char *p; |
| |
| /* .o files and NLMs have non-zero text seg offsets, but don't need |
| their static syms offset in this fashion. XXX - This is really a |
| crock that should be fixed in the solib handling code so that I |
| don't have to work around it here. */ |
| |
| if (!symfile_relocatable) |
| { |
| p = strchr (name, ':'); |
| if (p != 0 && p[1] == 'S') |
| { |
| /* The linker relocated it. We don't want to add an |
| elfstab_offset_sections-type offset, but we *do* want |
| to add whatever solib.c passed to symbol_file_add as |
| addr (this is known to affect SunOS4, and I suspect ELF |
| too). Since elfstab_offset_sections currently does not |
| muck with the text offset (there is no Ttext.text |
| symbol), we can get addr from the text offset. If |
| elfstab_offset_sections ever starts dealing with the |
| text offset, and we still need to do this, we need to |
| invent a SECT_OFF_ADDR_KLUDGE or something. */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| goto define_a_symbol; |
| } |
| } |
| /* Since it's not the kludge case, re-dispatch to the right handler. */ |
| switch (type) |
| { |
| case N_STSYM: |
| goto case_N_STSYM; |
| case N_LCSYM: |
| goto case_N_LCSYM; |
| case N_ROSYM: |
| goto case_N_ROSYM; |
| default: |
| abort (); |
| } |
| } |
| |
| case_N_STSYM: /* Static symbol in data seg */ |
| case N_DSLINE: /* Source line number, data seg */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_DATA); |
| goto define_a_symbol; |
| |
| case_N_LCSYM: /* Static symbol in BSS seg */ |
| case N_BSLINE: /* Source line number, bss seg */ |
| /* N_BROWS: overlaps with N_BSLINE */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_BSS); |
| goto define_a_symbol; |
| |
| case_N_ROSYM: /* Static symbol in Read-only data seg */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_RODATA); |
| goto define_a_symbol; |
| |
| case N_ENTRY: /* Alternate entry point */ |
| /* Relocate for dynamic loading */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| goto define_a_symbol; |
| |
| /* The following symbol types we don't know how to process. Handle |
| them in a "default" way, but complain to people who care. */ |
| default: |
| case N_CATCH: /* Exception handler catcher */ |
| case N_EHDECL: /* Exception handler name */ |
| case N_PC: /* Global symbol in Pascal */ |
| case N_M2C: /* Modula-2 compilation unit */ |
| /* N_MOD2: overlaps with N_EHDECL */ |
| case N_SCOPE: /* Modula-2 scope information */ |
| case N_ECOML: /* End common (local name) */ |
| case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ |
| case N_NBDATA: |
| case N_NBBSS: |
| case N_NBSTS: |
| case N_NBLCS: |
| complain (&unknown_symtype_complaint, local_hex_string (type)); |
| /* FALLTHROUGH */ |
| |
| /* The following symbol types don't need the address field relocated, |
| since it is either unused, or is absolute. */ |
| define_a_symbol: |
| case N_GSYM: /* Global variable */ |
| case N_NSYMS: /* Number of symbols (ultrix) */ |
| case N_NOMAP: /* No map? (ultrix) */ |
| case N_RSYM: /* Register variable */ |
| case N_DEFD: /* Modula-2 GNU module dependency */ |
| case N_SSYM: /* Struct or union element */ |
| case N_LSYM: /* Local symbol in stack */ |
| case N_PSYM: /* Parameter variable */ |
| case N_LENG: /* Length of preceding symbol type */ |
| if (name) |
| { |
| int deftype; |
| char *colon_pos = strchr (name, ':'); |
| if (colon_pos == NULL) |
| deftype = '\0'; |
| else |
| deftype = colon_pos[1]; |
| |
| switch (deftype) |
| { |
| case 'f': |
| case 'F': |
| function_stab_type = type; |
| |
| #ifdef SOFUN_ADDRESS_MAYBE_MISSING |
| /* Deal with the SunPRO 3.0 compiler which omits the address |
| from N_FUN symbols. */ |
| if (type == N_FUN |
| && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT)) |
| { |
| struct minimal_symbol *msym; |
| char *p; |
| int n; |
| |
| p = strchr (name, ':'); |
| if (p == NULL) |
| p = name; |
| n = p - name; |
| p = alloca (n + 2); |
| strncpy (p, name, n); |
| p[n] = 0; |
| |
| msym = lookup_minimal_symbol (p, last_source_file, |
| objfile); |
| if (msym == NULL) |
| { |
| /* Sun Fortran appends an underscore to the minimal |
| symbol name, try again with an appended underscore |
| if the minimal symbol was not found. */ |
| p[n] = '_'; |
| p[n + 1] = 0; |
| msym = lookup_minimal_symbol (p, last_source_file, |
| objfile); |
| } |
| if (msym) |
| valu = SYMBOL_VALUE_ADDRESS (msym); |
| } |
| #endif |
| |
| #ifdef SUN_FIXED_LBRAC_BUG |
| /* The Sun acc compiler, under SunOS4, puts out |
| functions with N_GSYM or N_STSYM. The problem is |
| that the address of the symbol is no good (for N_GSYM |
| it doesn't even attept an address; for N_STSYM it |
| puts out an address but then it gets relocated |
| relative to the data segment, not the text segment). |
| Currently we can't fix this up later as we do for |
| some types of symbol in scan_file_globals. |
| Fortunately we do have a way of finding the address - |
| we know that the value in last_pc_address is either |
| the one we want (if we're dealing with the first |
| function in an object file), or somewhere in the |
| previous function. This means that we can use the |
| minimal symbol table to get the address. */ |
| |
| /* Starting with release 3.0, the Sun acc compiler, |
| under SunOS4, puts out functions with N_FUN and a value |
| of zero. This gets relocated to the start of the text |
| segment of the module, which is no good either. |
| Under SunOS4 we can deal with this as N_SLINE and N_SO |
| entries contain valid absolute addresses. |
| Release 3.0 acc also puts out N_OPT entries, which makes |
| it possible to discern acc from cc or gcc. */ |
| |
| if (type == N_GSYM || type == N_STSYM |
| || (type == N_FUN |
| && n_opt_found && !block_address_function_relative)) |
| { |
| struct minimal_symbol *m; |
| int l = colon_pos - name; |
| |
| m = lookup_minimal_symbol_by_pc (last_pc_address); |
| if (m && STREQN (SYMBOL_NAME (m), name, l) |
| && SYMBOL_NAME (m)[l] == '\0') |
| /* last_pc_address was in this function */ |
| valu = SYMBOL_VALUE (m); |
| else if (m && SYMBOL_NAME (m + 1) |
| && STREQN (SYMBOL_NAME (m + 1), name, l) |
| && SYMBOL_NAME (m + 1)[l] == '\0') |
| /* last_pc_address was in last function */ |
| valu = SYMBOL_VALUE (m + 1); |
| else |
| /* Not found - use last_pc_address (for finish_block) */ |
| valu = last_pc_address; |
| } |
| |
| last_pc_address = valu; /* Save for SunOS bug circumcision */ |
| #endif |
| |
| if (block_address_function_relative) |
| /* For Solaris 2.0 compilers, the block addresses and |
| N_SLINE's are relative to the start of the |
| function. On normal systems, and when using gcc on |
| Solaris 2.0, these addresses are just absolute, or |
| relative to the N_SO, depending on |
| BLOCK_ADDRESS_ABSOLUTE. */ |
| function_start_offset = valu; |
| |
| within_function = 1; |
| if (context_stack_depth > 0) |
| { |
| new = pop_context (); |
| /* Make a block for the local symbols within. */ |
| finish_block (new->name, &local_symbols, new->old_blocks, |
| new->start_addr, valu, objfile); |
| } |
| /* Stack must be empty now. */ |
| if (context_stack_depth != 0) |
| complain (&lbrac_unmatched_complaint, symnum); |
| |
| new = push_context (0, valu); |
| new->name = define_symbol (valu, name, desc, type, objfile); |
| break; |
| |
| default: |
| define_symbol (valu, name, desc, type, objfile); |
| break; |
| } |
| } |
| break; |
| |
| /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it |
| for a bunch of other flags, too. Someday we may parse their |
| flags; for now we ignore theirs and hope they'll ignore ours. */ |
| case N_OPT: /* Solaris 2: Compiler options */ |
| if (name) |
| { |
| if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL)) |
| { |
| processing_gcc_compilation = 2; |
| #if 1 /* Works, but is experimental. -fnf */ |
| if (AUTO_DEMANGLING) |
| { |
| set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| } |
| #endif |
| } |
| else |
| n_opt_found = 1; |
| } |
| break; |
| |
| /* The following symbol types can be ignored. */ |
| case N_OBJ: /* Solaris 2: Object file dir and name */ |
| /* N_UNDF: Solaris 2: file separator mark */ |
| /* N_UNDF: -- we will never encounter it, since we only process one |
| file's symbols at once. */ |
| case N_ENDM: /* Solaris 2: End of module */ |
| case N_MAIN: /* Name of main routine. */ |
| case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ |
| break; |
| } |
| |
| /* '#' is a GNU C extension to allow one symbol to refer to another |
| related symbol. |
| |
| Generally this is used so that an alias can refer to its main |
| symbol. */ |
| if (name[0] == '#') |
| { |
| /* Initialize symbol reference names and determine if this is |
| a definition. If symbol reference is being defined, go |
| ahead and add it. Otherwise, just return sym. */ |
| |
| char *s = name; |
| int refnum; |
| |
| /* If this stab defines a new reference ID that is not on the |
| reference list, then put it on the reference list. |
| |
| We go ahead and advance NAME past the reference, even though |
| it is not strictly necessary at this time. */ |
| refnum = symbol_reference_defined (&s); |
| if (refnum >= 0) |
| if (!ref_search (refnum)) |
| ref_add (refnum, 0, name, valu); |
| name = s; |
| } |
| |
| |
| previous_stab_code = type; |
| } |
| |
| /* FIXME: The only difference between this and elfstab_build_psymtabs |
| is the call to install_minimal_symbols for elf, and the support for |
| split sections. If the differences are really that small, the code |
| should be shared. */ |
| |
| /* Scan and build partial symbols for an coff symbol file. |
| The coff file has already been processed to get its minimal symbols. |
| |
| This routine is the equivalent of dbx_symfile_init and dbx_symfile_read |
| rolled into one. |
| |
| OBJFILE is the object file we are reading symbols from. |
| ADDR is the address relative to which the symbols are (e.g. |
| the base address of the text segment). |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). |
| TEXTADDR is the address of the text section. |
| TEXTSIZE is the size of the text section. |
| STABSECTS is the list of .stab sections in OBJFILE. |
| STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the |
| .stabstr section exists. |
| |
| This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, |
| adjusted for coff details. */ |
| |
| void |
| coffstab_build_psymtabs (objfile, mainline, |
| textaddr, textsize, stabsects, |
| stabstroffset, stabstrsize) |
| struct objfile *objfile; |
| int mainline; |
| CORE_ADDR textaddr; |
| unsigned int textsize; |
| struct stab_section_list *stabsects; |
| file_ptr stabstroffset; |
| unsigned int stabstrsize; |
| { |
| int val; |
| bfd *sym_bfd = objfile->obfd; |
| char *name = bfd_get_filename (sym_bfd); |
| struct dbx_symfile_info *info; |
| unsigned int stabsize; |
| |
| /* There is already a dbx_symfile_info allocated by our caller. |
| It might even contain some info from the coff symtab to help us. */ |
| info = objfile->sym_stab_info; |
| |
| DBX_TEXT_ADDR (objfile) = textaddr; |
| DBX_TEXT_SIZE (objfile) = textsize; |
| |
| #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ |
| DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE; |
| DBX_STRINGTAB_SIZE (objfile) = stabstrsize; |
| |
| if (stabstrsize > bfd_get_size (sym_bfd)) |
| error ("ridiculous string table size: %d bytes", stabstrsize); |
| DBX_STRINGTAB (objfile) = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1); |
| OBJSTAT (objfile, sz_strtab += stabstrsize + 1); |
| |
| /* Now read in the string table in one big gulp. */ |
| |
| val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); |
| if (val < 0) |
| perror_with_name (name); |
| val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd); |
| if (val != stabstrsize) |
| perror_with_name (name); |
| |
| stabsread_new_init (); |
| buildsym_new_init (); |
| free_header_files (); |
| init_header_files (); |
| |
| processing_acc_compilation = 1; |
| |
| /* In a coff file, we've already installed the minimal symbols that came |
| from the coff (non-stab) symbol table, so always act like an |
| incremental load here. */ |
| if (stabsects->next == NULL) |
| { |
| stabsize = bfd_section_size (sym_bfd, stabsects->section); |
| DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); |
| DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos; |
| } |
| else |
| { |
| struct stab_section_list *stabsect; |
| |
| DBX_SYMCOUNT (objfile) = 0; |
| for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next) |
| { |
| stabsize = bfd_section_size (sym_bfd, stabsect->section); |
| DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile); |
| } |
| |
| DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos; |
| |
| symbuf_sections = stabsects->next; |
| symbuf_left = bfd_section_size (sym_bfd, stabsects->section); |
| symbuf_read = 0; |
| } |
| |
| dbx_symfile_read (objfile, 0); |
| } |
| |
| /* Scan and build partial symbols for an ELF symbol file. |
| This ELF file has already been processed to get its minimal symbols, |
| and any DWARF symbols that were in it. |
| |
| This routine is the equivalent of dbx_symfile_init and dbx_symfile_read |
| rolled into one. |
| |
| OBJFILE is the object file we are reading symbols from. |
| ADDR is the address relative to which the symbols are (e.g. |
| the base address of the text segment). |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). |
| STABOFFSET and STABSIZE define the location in OBJFILE where the .stab |
| section exists. |
| STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the |
| .stabstr section exists. |
| |
| This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, |
| adjusted for elf details. */ |
| |
| void |
| elfstab_build_psymtabs (objfile, mainline, |
| staboffset, stabsize, |
| stabstroffset, stabstrsize) |
| struct objfile *objfile; |
| int mainline; |
| file_ptr staboffset; |
| unsigned int stabsize; |
| file_ptr stabstroffset; |
| unsigned int stabstrsize; |
| { |
| int val; |
| bfd *sym_bfd = objfile->obfd; |
| char *name = bfd_get_filename (sym_bfd); |
| struct dbx_symfile_info *info; |
| |
| /* There is already a dbx_symfile_info allocated by our caller. |
| It might even contain some info from the ELF symtab to help us. */ |
| info = objfile->sym_stab_info; |
| |
| /* Find the first and last text address. dbx_symfile_read seems to |
| want this. */ |
| find_text_range (sym_bfd, objfile); |
| |
| #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ |
| DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; |
| DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); |
| DBX_STRINGTAB_SIZE (objfile) = stabstrsize; |
| DBX_SYMTAB_OFFSET (objfile) = staboffset; |
| |
| if (stabstrsize > bfd_get_size (sym_bfd)) |
| error ("ridiculous string table size: %d bytes", stabstrsize); |
| DBX_STRINGTAB (objfile) = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1); |
| OBJSTAT (objfile, sz_strtab += stabstrsize + 1); |
| |
| /* Now read in the string table in one big gulp. */ |
| |
| val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); |
| if (val < 0) |
| perror_with_name (name); |
| val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd); |
| if (val != stabstrsize) |
| perror_with_name (name); |
| |
| stabsread_new_init (); |
| buildsym_new_init (); |
| free_header_files (); |
| init_header_files (); |
| install_minimal_symbols (objfile); |
| |
| processing_acc_compilation = 1; |
| |
| /* In an elf file, we've already installed the minimal symbols that came |
| from the elf (non-stab) symbol table, so always act like an |
| incremental load here. */ |
| dbx_symfile_read (objfile, 0); |
| } |
| |
| /* Scan and build partial symbols for a file with special sections for stabs |
| and stabstrings. The file has already been processed to get its minimal |
| symbols, and any other symbols that might be necessary to resolve GSYMs. |
| |
| This routine is the equivalent of dbx_symfile_init and dbx_symfile_read |
| rolled into one. |
| |
| OBJFILE is the object file we are reading symbols from. |
| ADDR is the address relative to which the symbols are (e.g. the base address |
| of the text segment). |
| MAINLINE is true if we are reading the main symbol table (as opposed to a |
| shared lib or dynamically loaded file). |
| STAB_NAME is the name of the section that contains the stabs. |
| STABSTR_NAME is the name of the section that contains the stab strings. |
| |
| This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */ |
| |
| void |
| stabsect_build_psymtabs (objfile, mainline, stab_name, |
| stabstr_name, text_name) |
| struct objfile *objfile; |
| int mainline; |
| char *stab_name; |
| char *stabstr_name; |
| char *text_name; |
| { |
| int val; |
| bfd *sym_bfd = objfile->obfd; |
| char *name = bfd_get_filename (sym_bfd); |
| asection *stabsect; |
| asection *stabstrsect; |
| asection *text_sect; |
| |
| stabsect = bfd_get_section_by_name (sym_bfd, stab_name); |
| stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name); |
| |
| if (!stabsect) |
| return; |
| |
| if (!stabstrsect) |
| error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)", |
| stab_name, stabstr_name); |
| |
| objfile->sym_stab_info = (struct dbx_symfile_info *) |
| xmalloc (sizeof (struct dbx_symfile_info)); |
| memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); |
| |
| text_sect = bfd_get_section_by_name (sym_bfd, text_name); |
| if (!text_sect) |
| error ("Can't find %s section in symbol file", text_name); |
| DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); |
| DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); |
| |
| DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist); |
| DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect) |
| / DBX_SYMBOL_SIZE (objfile); |
| DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect); |
| DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */ |
| |
| if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) |
| error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile)); |
| DBX_STRINGTAB (objfile) = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1); |
| OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1); |
| |
| /* Now read in the string table in one big gulp. */ |
| |
| val = bfd_get_section_contents (sym_bfd, /* bfd */ |
| stabstrsect, /* bfd section */ |
| DBX_STRINGTAB (objfile), /* input buffer */ |
| 0, /* offset into section */ |
| DBX_STRINGTAB_SIZE (objfile)); /* amount to read */ |
| |
| if (!val) |
| perror_with_name (name); |
| |
| stabsread_new_init (); |
| buildsym_new_init (); |
| free_header_files (); |
| init_header_files (); |
| install_minimal_symbols (objfile); |
| |
| /* Now, do an incremental load */ |
| |
| processing_acc_compilation = 1; |
| dbx_symfile_read (objfile, 0); |
| } |
| |
| static struct sym_fns aout_sym_fns = |
| { |
| bfd_target_aout_flavour, |
| dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| dbx_symfile_read, /* sym_read: read a symbol file into symtab */ |
| dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_dbxread () |
| { |
| add_symtab_fns (&aout_sym_fns); |
| } |