diff options
Diffstat (limited to 'contrib/gdb/gdb/hp-psymtab-read.c')
| -rw-r--r-- | contrib/gdb/gdb/hp-psymtab-read.c | 2381 |
1 files changed, 2381 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/hp-psymtab-read.c b/contrib/gdb/gdb/hp-psymtab-read.c new file mode 100644 index 0000000..5926ada --- /dev/null +++ b/contrib/gdb/gdb/hp-psymtab-read.c @@ -0,0 +1,2381 @@ +/* Read hp debug symbols and convert to internal format, for GDB. + Copyright 1993, 1996, 1998, 1999 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. + + Written by the Center for Software Science at the University of Utah + and by Cygnus Support. */ + +/* Common include file for hp_symtab_read.c and hp_psymtab_read.c. + This has nested includes of a bunch of stuff. */ +#include "hpread.h" +#include "demangle.h" + +/* To generate dumping code, uncomment this define. The dumping + itself is controlled by routine-local statics called "dumping". */ +/* #define DUMPING 1 */ + +/* To use the quick look-up tables, uncomment this define. */ +#define QUICK_LOOK_UP 1 + +/* To call PXDB to process un-processed files, uncomment this define. */ +#define USE_PXDB 1 + +/* Forward procedure declarations */ + +void hpread_symfile_init + PARAMS ((struct objfile *)); + +void +do_pxdb PARAMS ((bfd *)); + +void hpread_build_psymtabs + PARAMS ((struct objfile *, struct section_offsets *, int)); + +void hpread_symfile_finish + PARAMS ((struct objfile *)); + +static union dnttentry *hpread_get_gntt + PARAMS ((int, struct objfile *)); + +static unsigned long hpread_get_textlow + PARAMS ((int, int, struct objfile *, int)); + +static struct partial_symtab *hpread_start_psymtab + PARAMS ((struct objfile *, struct section_offsets *, char *, CORE_ADDR, int, + struct partial_symbol **, struct partial_symbol **)); + +static struct partial_symtab *hpread_end_psymtab + PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR, + struct partial_symtab **, int)); + +/* End of forward routine declarations */ + +#ifdef USE_PXDB + +/* NOTE use of system files! May not be portable. */ + +#define PXDB_SVR4 "/opt/langtools/bin/pxdb" +#define PXDB_BSD "/usr/bin/pxdb" + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +/* check for the existance of a file, given its full pathname */ +int +file_exists (filename) + char *filename; +{ + if (filename) + return (access (filename, F_OK) == 0); + return 0; +} + + +/* Translate from the "hp_language" enumeration in hp-symtab.h + used in the debug info to gdb's generic enumeration in defs.h. */ +static enum language +trans_lang (in_lang) + enum hp_language in_lang; +{ + if (in_lang == HP_LANGUAGE_C) + return language_c; + + else if (in_lang == HP_LANGUAGE_CPLUSPLUS) + return language_cplus; + + else if (in_lang == HP_LANGUAGE_F77) + return language_fortran; + + else + return language_unknown; +} + +static char main_string[] = "main"; + +/* Call PXDB to process our file. + + Approach copied from DDE's "dbgk_run_pxdb". Note: we + don't check for BSD location of pxdb, nor for existance + of pxdb itself, etc. + + NOTE: uses system function and string functions directly. + + Return value: 1 if ok, 0 if not */ +int +hpread_call_pxdb (file_name) + char *file_name; +{ + char *p; + int status; + int retval; + + if (file_exists (PXDB_SVR4)) + { + p = malloc (strlen (PXDB_SVR4) + strlen (file_name) + 2); + strcpy (p, PXDB_SVR4); + strcat (p, " "); + strcat (p, file_name); + + warning ("File not processed by pxdb--about to process now.\n"); + status = system (p); + + retval = (status == 0); + } + else + { + warning ("pxdb not found at standard location: /opt/langtools/bin\ngdb will not be able to debug %s.\nPlease install pxdb at the above location and then restart gdb.\nYou can also run pxdb on %s with the command\n\"pxdb %s\" and then restart gdb.", file_name, file_name, file_name); + + retval = 0; + } + return retval; +} /* hpread_call_pxdb */ + + +/* Return 1 if the file turns out to need pre-processing + by PXDB, and we have thus called PXDB to do this processing + and the file therefore needs to be re-loaded. Otherwise + return 0. */ +int +hpread_pxdb_needed (sym_bfd) + bfd *sym_bfd; +{ + asection *pinfo_section, *debug_section, *header_section; + unsigned int do_pxdb; + char *buf; + bfd_size_type header_section_size; + + unsigned long tmp; + unsigned int pxdbed; + + header_section = bfd_get_section_by_name (sym_bfd, "$HEADER$"); + if (!header_section) + { + return 0; /* No header at all, can't recover... */ + } + + debug_section = bfd_get_section_by_name (sym_bfd, "$DEBUG$"); + pinfo_section = bfd_get_section_by_name (sym_bfd, "$PINFO$"); + + if (pinfo_section && !debug_section) + { + /* Debug info with DOC, has different header format. + this only happens if the file was pxdbed and compiled optimized + otherwise the PINFO section is not there. */ + header_section_size = bfd_section_size (objfile->obfd, header_section); + + if (header_section_size == (bfd_size_type) sizeof (DOC_info_PXDB_header)) + { + buf = alloca (sizeof (DOC_info_PXDB_header)); + + if (!bfd_get_section_contents (sym_bfd, + header_section, + buf, 0, + header_section_size)) + error ("bfd_get_section_contents\n"); + + tmp = bfd_get_32 (sym_bfd, (bfd_byte *) (buf + sizeof (int) * 4)); + pxdbed = (tmp >> 31) & 0x1; + + if (!pxdbed) + error ("file debug header info invalid\n"); + do_pxdb = 0; + } + + else + error ("invalid $HEADER$ size in executable \n"); + } + + else + { + + /* this can be three different cases: + 1. pxdbed and not doc + - DEBUG and HEADER sections are there + - header is PXDB_header type + - pxdbed flag is set to 1 + + 2. not pxdbed and doc + - DEBUG and HEADER sections are there + - header is DOC_info_header type + - pxdbed flag is set to 0 + + 3. not pxdbed and not doc + - DEBUG and HEADER sections are there + - header is XDB_header type + - pxdbed flag is set to 0 + + NOTE: the pxdbed flag is meaningful also in the not + already pxdb processed version of the header, + because in case on non-already processed by pxdb files + that same bit in the header would be always zero. + Why? Because the bit is the leftmost bit of a word + which contains a 'length' which is always a positive value + so that bit is never set to 1 (otherwise it would be negative) + + Given the above, we have two choices : either we ignore the + size of the header itself and just look at the pxdbed field, + or we check the size and then we (for safety and paranoia related + issues) check the bit. + The first solution is used by DDE, the second by PXDB itself. + I am using the second one here, because I already wrote it, + and it is the end of a long day. + Also, using the first approach would still involve size issues + because we need to read in the contents of the header section, and + give the correct amount of stuff we want to read to the + get_bfd_section_contents function. */ + + /* decide which case depending on the size of the header section. + The size is as defined in hp-symtab.h */ + + header_section_size = bfd_section_size (objfile->obfd, header_section); + + if (header_section_size == (bfd_size_type) sizeof (PXDB_header)) /* pxdb and not doc */ + { + + buf = alloca (sizeof (PXDB_header)); + if (!bfd_get_section_contents (sym_bfd, + header_section, + buf, 0, + header_section_size)) + error ("bfd_get_section_contents\n"); + + tmp = bfd_get_32 (sym_bfd, (bfd_byte *) (buf + sizeof (int) * 3)); + pxdbed = (tmp >> 31) & 0x1; + + if (pxdbed) + do_pxdb = 0; + else + error ("file debug header invalid\n"); + } + else /*not pxdbed and doc OR not pxdbed and non doc */ + do_pxdb = 1; + } + + if (do_pxdb) + { + return 1; + } + else + { + return 0; + } +} /* hpread_pxdb_needed */ + +#endif + +/* Check whether the file needs to be preprocessed by pxdb. + If so, call pxdb. */ + +void +do_pxdb (sym_bfd) + bfd *sym_bfd; +{ + /* The following code is HP-specific. The "right" way of + doing this is unknown, but we bet would involve a target- + specific pre-file-load check using a generic mechanism. */ + + /* This code will not be executed if the file is not in SOM + format (i.e. if compiled with gcc) */ + if (hpread_pxdb_needed (sym_bfd)) + { + /*This file has not been pre-processed. Preprocess now */ + + if (hpread_call_pxdb (sym_bfd->filename)) + { + /* The call above has changed the on-disk file, + we can close the file anyway, because the + symbols will be reread in when the target is run */ + bfd_close (sym_bfd); + } + } +} + + + +#ifdef QUICK_LOOK_UP + +/* Code to handle quick lookup-tables follows. */ + + +/* Some useful macros */ +#define VALID_FILE(i) ((i) < pxdb_header_p->fd_entries) +#define VALID_MODULE(i) ((i) < pxdb_header_p->md_entries) +#define VALID_PROC(i) ((i) < pxdb_header_p->pd_entries) +#define VALID_CLASS(i) ((i) < pxdb_header_p->cd_entries) + +#define FILE_START(i) (qFD[i].adrStart) +#define MODULE_START(i) (qMD[i].adrStart) +#define PROC_START(i) (qPD[i].adrStart) + +#define FILE_END(i) (qFD[i].adrEnd) +#define MODULE_END(i) (qMD[i].adrEnd) +#define PROC_END(i) (qPD[i].adrEnd) + +#define FILE_ISYM(i) (qFD[i].isym) +#define MODULE_ISYM(i) (qMD[i].isym) +#define PROC_ISYM(i) (qPD[i].isym) + +#define VALID_CURR_FILE (curr_fd < pxdb_header_p->fd_entries) +#define VALID_CURR_MODULE (curr_md < pxdb_header_p->md_entries) +#define VALID_CURR_PROC (curr_pd < pxdb_header_p->pd_entries) +#define VALID_CURR_CLASS (curr_cd < pxdb_header_p->cd_entries) + +#define CURR_FILE_START (qFD[curr_fd].adrStart) +#define CURR_MODULE_START (qMD[curr_md].adrStart) +#define CURR_PROC_START (qPD[curr_pd].adrStart) + +#define CURR_FILE_END (qFD[curr_fd].adrEnd) +#define CURR_MODULE_END (qMD[curr_md].adrEnd) +#define CURR_PROC_END (qPD[curr_pd].adrEnd) + +#define CURR_FILE_ISYM (qFD[curr_fd].isym) +#define CURR_MODULE_ISYM (qMD[curr_md].isym) +#define CURR_PROC_ISYM (qPD[curr_pd].isym) + +#define TELL_OBJFILE \ + do { \ + if( !told_objfile ) { \ + told_objfile = 1; \ + warning ("\nIn object file \"%s\":\n", \ + objfile->name); \ + } \ + } while (0) + + + +/* Keeping track of the start/end symbol table (LNTT) indices of + psymtabs created so far */ + +typedef struct + { + int start; + int end; + } +pst_syms_struct; + +static pst_syms_struct *pst_syms_array = 0; + +static pst_syms_count = 0; +static pst_syms_size = 0; + +/* used by the TELL_OBJFILE macro */ +static boolean told_objfile = 0; + +/* Set up psymtab symbol index stuff */ +static void +init_pst_syms () +{ + pst_syms_count = 0; + pst_syms_size = 20; + pst_syms_array = (pst_syms_struct *) xmalloc (20 * sizeof (pst_syms_struct)); +} + +/* Clean up psymtab symbol index stuff */ +static void +clear_pst_syms () +{ + pst_syms_count = 0; + pst_syms_size = 0; + free (pst_syms_array); + pst_syms_array = 0; +} + +/* Add information about latest psymtab to symbol index table */ +static void +record_pst_syms (start_sym, end_sym) + int start_sym; + int end_sym; +{ + if (++pst_syms_count > pst_syms_size) + { + pst_syms_array = (pst_syms_struct *) xrealloc (pst_syms_array, + 2 * pst_syms_size * sizeof (pst_syms_struct)); + pst_syms_size *= 2; + } + pst_syms_array[pst_syms_count - 1].start = start_sym; + pst_syms_array[pst_syms_count - 1].end = end_sym; +} + +/* Find a suitable symbol table index which can serve as the upper + bound of a psymtab that starts at INDEX + + This scans backwards in the psymtab symbol index table to find a + "hole" in which the given index can fit. This is a heuristic!! + We don't search the entire table to check for multiple holes, + we don't care about overlaps, etc. + + Return 0 => not found */ +static int +find_next_pst_start (index) + int index; +{ + int i; + + for (i = pst_syms_count - 1; i >= 0; i--) + if (pst_syms_array[i].end <= index) + return (i == pst_syms_count - 1) ? 0 : pst_syms_array[i + 1].start - 1; + + if (pst_syms_array[0].start > index) + return pst_syms_array[0].start - 1; + + return 0; +} + + + +/* Utility functions to find the ending symbol index for a psymtab */ + +/* Find the next file entry that begins beyond INDEX, and return + its starting symbol index - 1. + QFD is the file table, CURR_FD is the file entry from where to start, + PXDB_HEADER_P as in hpread_quick_traverse (to allow macros to work). + + Return 0 => not found */ +static int +find_next_file_isym (index, qFD, curr_fd, pxdb_header_p) + int index; + quick_file_entry *qFD; + int curr_fd; + PXDB_header_ptr pxdb_header_p; +{ + while (VALID_CURR_FILE) + { + if (CURR_FILE_ISYM >= index) + return CURR_FILE_ISYM - 1; + curr_fd++; + } + return 0; +} + +/* Find the next procedure entry that begins beyond INDEX, and return + its starting symbol index - 1. + QPD is the procedure table, CURR_PD is the proc entry from where to start, + PXDB_HEADER_P as in hpread_quick_traverse (to allow macros to work). + + Return 0 => not found */ +static int +find_next_proc_isym (index, qPD, curr_pd, pxdb_header_p) + int index; + quick_procedure_entry *qPD; + int curr_pd; + PXDB_header_ptr pxdb_header_p; +{ + while (VALID_CURR_PROC) + { + if (CURR_PROC_ISYM >= index) + return CURR_PROC_ISYM - 1; + curr_pd++; + } + return 0; +} + +/* Find the next module entry that begins beyond INDEX, and return + its starting symbol index - 1. + QMD is the module table, CURR_MD is the modue entry from where to start, + PXDB_HEADER_P as in hpread_quick_traverse (to allow macros to work). + + Return 0 => not found */ +static int +find_next_module_isym (index, qMD, curr_md, pxdb_header_p) + int index; + quick_module_entry *qMD; + int curr_md; + PXDB_header_ptr pxdb_header_p; +{ + while (VALID_CURR_MODULE) + { + if (CURR_MODULE_ISYM >= index) + return CURR_MODULE_ISYM - 1; + curr_md++; + } + return 0; +} + +/* Scan and record partial symbols for all functions starting from index + pointed to by CURR_PD_P, and between code addresses START_ADR and END_ADR. + Other parameters are explained in comments below. */ + +/* This used to be inline in hpread_quick_traverse, but now that we do essentially the + same thing for two different cases (modules and module-less files), it's better + organized in a separate routine, although it does take lots of arguments. pai/1997-10-08 */ + +static int +scan_procs (curr_pd_p, qPD, max_procs, start_adr, end_adr, pst, vt_bits, objfile, section_offsets) + int *curr_pd_p; /* pointer to current proc index */ + quick_procedure_entry *qPD; /* the procedure quick lookup table */ + int max_procs; /* number of entries in proc. table */ + CORE_ADDR start_adr; /* beginning of code range for current psymtab */ + CORE_ADDR end_adr; /* end of code range for current psymtab */ + struct partial_symtab *pst; /* current psymtab */ + char *vt_bits; /* strings table of SOM debug space */ + struct objfile *objfile; /* current object file */ + struct section_offsets *section_offsets; /* not really used for HP-UX currently */ +{ + union dnttentry *dn_bufp; + int symbol_count = 0; /* Total number of symbols in this psymtab */ + int curr_pd = *curr_pd_p; /* Convenience variable -- avoid dereferencing pointer all the time */ + +#ifdef DUMPING + /* Turn this on for lots of debugging information in this routine */ + static int dumping = 0; +#endif + +#ifdef DUMPING + if (dumping) + { + printf ("Scan_procs called, addresses %x to %x, proc %x\n", start_adr, end_adr, curr_pd); + } +#endif + + while ((CURR_PROC_START <= end_adr) && (curr_pd < max_procs)) + { + + char *rtn_name; /* mangled name */ + char *rtn_dem_name; /* qualified demangled name */ + char *class_name; + int class; + + if ((trans_lang ((enum hp_language) qPD[curr_pd].language) == language_cplus) && + vt_bits[(long) qPD[curr_pd].sbAlias]) /* not a null string */ + { + /* Get mangled name for the procedure, and demangle it */ + rtn_name = &vt_bits[(long) qPD[curr_pd].sbAlias]; + rtn_dem_name = cplus_demangle (rtn_name, DMGL_ANSI | DMGL_PARAMS); + } + else + { + rtn_name = &vt_bits[(long) qPD[curr_pd].sbProc]; + rtn_dem_name = NULL; + } + + /* Hack to get around HP C/C++ compilers' insistence on providing + "_MAIN_" as an alternate name for "main" */ + if ((strcmp (rtn_name, "_MAIN_") == 0) && + (strcmp (&vt_bits[(long) qPD[curr_pd].sbProc], "main") == 0)) + rtn_dem_name = rtn_name = main_string; + +#ifdef DUMPING + if (dumping) + { + printf ("..add %s (demangled %s), index %x to this psymtab\n", rtn_name, rtn_dem_name, curr_pd); + } +#endif + + /* Check for module-spanning routines. */ + if (CURR_PROC_END > end_adr) + { + TELL_OBJFILE; + warning ("Procedure \"%s\" [0x%x] spans file or module boundaries.", rtn_name, curr_pd); + } + + /* Add this routine symbol to the list in the objfile. + Unfortunately we have to go to the LNTT to determine the + correct list to put it on. An alternative (which the + code used to do) would be to not check and always throw + it on the "static" list. But if we go that route, then + symbol_lookup() needs to be tweaked a bit to account + for the fact that the function might not be found on + the correct list in the psymtab. - RT */ + dn_bufp = hpread_get_lntt (qPD[curr_pd].isym, objfile); + if (dn_bufp->dfunc.global) + add_psymbol_with_dem_name_to_list (rtn_name, + strlen (rtn_name), + rtn_dem_name, + strlen (rtn_dem_name), + VAR_NAMESPACE, + LOC_BLOCK, /* "I am a routine" */ + &objfile->global_psymbols, + (qPD[curr_pd].adrStart + /* Starting address of rtn */ + ANOFFSET (section_offsets, SECT_OFF_TEXT)), + 0, /* core addr?? */ + trans_lang ((enum hp_language) qPD[curr_pd].language), + objfile); + else + add_psymbol_with_dem_name_to_list (rtn_name, + strlen (rtn_name), + rtn_dem_name, + strlen (rtn_dem_name), + VAR_NAMESPACE, + LOC_BLOCK, /* "I am a routine" */ + &objfile->static_psymbols, + (qPD[curr_pd].adrStart + /* Starting address of rtn */ + ANOFFSET (section_offsets, SECT_OFF_TEXT)), + 0, /* core addr?? */ + trans_lang ((enum hp_language) qPD[curr_pd].language), + objfile); + + symbol_count++; + *curr_pd_p = ++curr_pd; /* bump up count & reflect in caller */ + } /* loop over procedures */ + +#ifdef DUMPING + if (dumping) + { + if (symbol_count == 0) + printf ("Scan_procs: no symbols found!\n"); + } +#endif + + return symbol_count; +} + + +/* Traverse the quick look-up tables, building a set of psymtabs. + + This constructs a psymtab for modules and files in the quick lookup + tables. + + Mostly, modules correspond to compilation units, so we try to + create psymtabs that correspond to modules; however, in some cases + a file can result in a compiled object which does not have a module + entry for it, so in such cases we create a psymtab for the file. */ + +int +hpread_quick_traverse (objfile, section_offsets, gntt_bits, vt_bits, pxdb_header_p) + struct objfile *objfile; /* The object file descriptor */ + struct section_offsets *section_offsets; /* ?? Null for HP */ + char *gntt_bits; /* GNTT entries, loaded in from the file */ + char *vt_bits; /* VT (string) entries ditto. */ + PXDB_header_ptr pxdb_header_p; /* Pointer to pxdb header ditto */ +{ + struct partial_symtab *pst; + + char *addr; + + quick_procedure_entry *qPD; + quick_file_entry *qFD; + quick_module_entry *qMD; + quick_class_entry *qCD; + + int idx; + int i; + CORE_ADDR start_adr; /* current psymtab's starting code addr */ + CORE_ADDR end_adr; /* current psymtab's ending code addr */ + CORE_ADDR next_mod_adr; /* next module's starting code addr */ + int curr_pd; /* current procedure */ + int curr_fd; /* current file */ + int curr_md; /* current module */ + int start_sym; /* current psymtab's starting symbol index */ + int end_sym; /* current psymtab's ending symbol index */ + int max_LNTT_sym_index; + int syms_in_pst; + B_TYPE *class_entered; + + struct partial_symbol **global_syms; /* We'll be filling in the "global" */ + struct partial_symbol **static_syms; /* and "static" tables in the objfile + as we go, so we need a pair of + current pointers. */ + +#ifdef DUMPING + /* Turn this on for lots of debugging information in this routine. + You get a blow-by-blow account of quick lookup table reading */ + static int dumping = 0; +#endif + + pst = (struct partial_symtab *) 0; + + /* Clear out some globals */ + init_pst_syms (); + told_objfile = 0; + + /* Demangling style -- if EDG style already set, don't change it, + as HP style causes some problems with the KAI EDG compiler */ + if (current_demangling_style != edg_demangling) + { + /* Otherwise, ensure that we are using HP style demangling */ + set_demangling_style (HP_DEMANGLING_STYLE_STRING); + } + + /* First we need to find the starting points of the quick + look-up tables in the GNTT. */ + + addr = gntt_bits; + + qPD = (quick_procedure_entry_ptr) addr; + addr += pxdb_header_p->pd_entries * sizeof (quick_procedure_entry); + +#ifdef DUMPING + if (dumping) + { + printf ("\n Printing routines as we see them\n"); + for (i = 0; VALID_PROC (i); i++) + { + idx = (long) qPD[i].sbProc; + printf ("%s %x..%x\n", &vt_bits[idx], + (int) PROC_START (i), + (int) PROC_END (i)); + } + } +#endif + + qFD = (quick_file_entry_ptr) addr; + addr += pxdb_header_p->fd_entries * sizeof (quick_file_entry); + +#ifdef DUMPING + if (dumping) + { + printf ("\n Printing files as we see them\n"); + for (i = 0; VALID_FILE (i); i++) + { + idx = (long) qFD[i].sbFile; + printf ("%s %x..%x\n", &vt_bits[idx], + (int) FILE_START (i), + (int) FILE_END (i)); + } + } +#endif + + qMD = (quick_module_entry_ptr) addr; + addr += pxdb_header_p->md_entries * sizeof (quick_module_entry); + +#ifdef DUMPING + if (dumping) + { + printf ("\n Printing modules as we see them\n"); + for (i = 0; i < pxdb_header_p->md_entries; i++) + { + idx = (long) qMD[i].sbMod; + printf ("%s\n", &vt_bits[idx]); + } + } +#endif + + qCD = (quick_class_entry_ptr) addr; + addr += pxdb_header_p->cd_entries * sizeof (quick_class_entry); + +#ifdef DUMPING + if (dumping) + { + printf ("\n Printing classes as we see them\n"); + for (i = 0; VALID_CLASS (i); i++) + { + idx = (long) qCD[i].sbClass; + printf ("%s\n", &vt_bits[idx]); + } + + printf ("\n Done with dump, on to build!\n"); + } +#endif + + /* We need this index only while hp-symtab-read.c expects + a byte offset to the end of the LNTT entries for a given + psymtab. Thus the need for it should go away someday. + + When it goes away, then we won't have any need to load the + LNTT from the objfile at psymtab-time, and start-up will be + faster. To make that work, we'll need some way to create + a null pst for the "globals" pseudo-module. */ + max_LNTT_sym_index = LNTT_SYMCOUNT (objfile); + + /* Scan the module descriptors and make a psymtab for each. + + We know the MDs, FDs and the PDs are in order by starting + address. We use that fact to traverse all three arrays in + parallel, knowing when the next PD is in a new file + and we need to create a new psymtab. */ + curr_pd = 0; /* Current procedure entry */ + curr_fd = 0; /* Current file entry */ + curr_md = 0; /* Current module entry */ + + start_adr = 0; /* Current psymtab code range */ + end_adr = 0; + + start_sym = 0; /* Current psymtab symbol range */ + end_sym = 0; + + syms_in_pst = 0; /* Symbol count for psymtab */ + + /* Psts actually just have pointers into the objfile's + symbol table, not their own symbol tables. */ + global_syms = objfile->global_psymbols.list; + static_syms = objfile->static_psymbols.list; + + + /* First skip over pseudo-entries with address 0. These represent inlined + routines and abstract (uninstantiated) template routines. + FIXME: These should be read in and available -- even if we can't set + breakpoints, etc., there's some information that can be presented + to the user. pai/1997-10-08 */ + + while (VALID_CURR_PROC && (CURR_PROC_START == 0)) + curr_pd++; + + /* Loop over files, modules, and procedures in code address order. Each + time we enter an iteration of this loop, curr_pd points to the first + unprocessed procedure, curr_fd points to the first unprocessed file, and + curr_md to the first unprocessed module. Each iteration of this loop + updates these as required -- any or all of them may be bumpd up + each time around. When we exit this loop, we are done with all files + and modules in the tables -- there may still be some procedures, however. + + Note: This code used to loop only over module entries, under the assumption + that files can occur via inclusions and are thus unreliable, while a + compiled object always corresponds to a module. With CTTI in the HP aCC + compiler, it turns out that compiled objects may have only files and no + modules; so we have to loop over files and modules, creating psymtabs for + either as appropriate. Unfortunately there are some problems (notably: + 1. the lack of "SRC_FILE_END" entries in the LNTT, 2. the lack of pointers + to the ending symbol indices of a module or a file) which make it quite hard + to do this correctly. Currently it uses a bunch of heuristics to start and + end psymtabs; they seem to work well with most objects generated by aCC, but + who knows when that will change... */ + + while (VALID_CURR_FILE || VALID_CURR_MODULE) + { + + char *mod_name_string; + char *full_name_string; + + /* First check for modules like "version.c", which have no code + in them but still have qMD entries. They also have no qFD or + qPD entries. Their start address is -1 and their end address + is 0. */ + if (VALID_CURR_MODULE && (CURR_MODULE_START == -1) && (CURR_MODULE_END == 0)) + { + + mod_name_string = &vt_bits[(long) qMD[curr_md].sbMod]; + +#ifdef DUMPING + if (dumping) + printf ("Module with data only %s\n", mod_name_string); +#endif + + /* We'll skip the rest (it makes error-checking easier), and + just make an empty pst. Right now empty psts are not put + in the pst chain, so all this is for naught, but later it + might help. */ + + pst = hpread_start_psymtab (objfile, + section_offsets, /* ?? */ + mod_name_string, + CURR_MODULE_START, /* Low text address: bogus! */ + (CURR_MODULE_ISYM * sizeof (struct dntt_type_block)), + /* ldsymoff */ + global_syms, + static_syms); + + pst = hpread_end_psymtab (pst, + NULL, /* psymtab_include_list */ + 0, /* includes_used */ + end_sym * sizeof (struct dntt_type_block), + /* byte index in LNTT of end + = capping symbol offset + = LDSYMOFF of nextfile */ + 0, /* text high */ + NULL, /* dependency_list */ + 0); /* dependencies_used */ + + global_syms = objfile->global_psymbols.next; + static_syms = objfile->static_psymbols.next; + + curr_md++; + } + else if (VALID_CURR_MODULE && + ((CURR_MODULE_START == 0) || (CURR_MODULE_START == -1) || + (CURR_MODULE_END == 0) || (CURR_MODULE_END == -1))) + { + TELL_OBJFILE; + warning ("Module \"%s\" [0x%x] has non-standard addresses. It starts at 0x%x, ends at 0x%x, and will be skipped.", + mod_name_string, curr_md, start_adr, end_adr); + /* On to next module */ + curr_md++; + } + else + { + /* First check if we are looking at a file with code in it + that does not overlap the current module's code range */ + + if (VALID_CURR_FILE ? (VALID_CURR_MODULE ? (CURR_FILE_END < CURR_MODULE_START) : 1) : 0) + { + + /* Looking at file not corresponding to any module, + create a psymtab for it */ + full_name_string = &vt_bits[(long) qFD[curr_fd].sbFile]; + start_adr = CURR_FILE_START; + end_adr = CURR_FILE_END; + start_sym = CURR_FILE_ISYM; + + /* Check if there are any procedures not handled until now, that + begin before the start address of this file, and if so, adjust + this module's start address to include them. This handles routines that + are in between file or module ranges for some reason (probably + indicates a compiler bug */ + + if (CURR_PROC_START < start_adr) + { + TELL_OBJFILE; + warning ("Found procedure \"%s\" [0x%x] that is not in any file or module.", + &vt_bits[(long) qPD[curr_pd].sbProc], curr_pd); + start_adr = CURR_PROC_START; + if (CURR_PROC_ISYM < start_sym) + start_sym = CURR_PROC_ISYM; + } + + /* Sometimes (compiler bug -- COBOL) the module end address is higher + than the start address of the next module, so check for that and + adjust accordingly */ + + if (VALID_FILE (curr_fd + 1) && (FILE_START (curr_fd + 1) <= end_adr)) + { + TELL_OBJFILE; + warning ("File \"%s\" [0x%x] has ending address after starting address of next file; adjusting ending address down.", + full_name_string, curr_fd); + end_adr = FILE_START (curr_fd + 1) - 1; /* Is -4 (or -8 for 64-bit) better? */ + } + if (VALID_MODULE (curr_md) && (CURR_MODULE_START <= end_adr)) + { + TELL_OBJFILE; + warning ("File \"%s\" [0x%x] has ending address after starting address of next module; adjusting ending address down.", + full_name_string, curr_fd); + end_adr = CURR_MODULE_START - 1; /* Is -4 (or -8 for 64-bit) better? */ + } + + +#ifdef DUMPING + if (dumping) + { + printf ("Make new psymtab for file %s (%x to %x).\n", + full_name_string, start_adr, end_adr); + } +#endif + /* Create the basic psymtab, connecting it in the list + for this objfile and pointing its symbol entries + to the current end of the symbol areas in the objfile. + + The "ldsymoff" parameter is the byte offset in the LNTT + of the first symbol in this file. Some day we should + turn this into an index (fix in hp-symtab-read.c as well). + And it's not even the right byte offset, as we're using + the size of a union! FIXME! */ + pst = hpread_start_psymtab (objfile, + section_offsets, /* ?? */ + full_name_string, + start_adr, /* Low text address */ + (start_sym * sizeof (struct dntt_type_block)), + /* ldsymoff */ + global_syms, + static_syms); + + /* Set up to only enter each class referenced in this module once. */ + class_entered = malloc (B_BYTES (pxdb_header_p->cd_entries)); + B_CLRALL (class_entered, pxdb_header_p->cd_entries); + + /* Scan the procedure descriptors for procedures in the current + file, based on the starting addresses. */ + + syms_in_pst = scan_procs (&curr_pd, qPD, pxdb_header_p->pd_entries, + start_adr, end_adr, + pst, vt_bits, objfile, section_offsets); + + /* Get ending symbol offset */ + + end_sym = 0; + /* First check for starting index before previous psymtab */ + if (pst_syms_count && start_sym < pst_syms_array[pst_syms_count - 1].end) + { + end_sym = find_next_pst_start (start_sym); + } + /* Look for next start index of a file or module, or procedure */ + if (!end_sym) + { + int next_file_isym = find_next_file_isym (start_sym, qFD, curr_fd + 1, pxdb_header_p); + int next_module_isym = find_next_module_isym (start_sym, qMD, curr_md, pxdb_header_p); + int next_proc_isym = find_next_proc_isym (start_sym, qPD, curr_pd, pxdb_header_p); + + if (next_file_isym && next_module_isym) + { + /* pick lower of next file or module start index */ + end_sym = min (next_file_isym, next_module_isym); + } + else + { + /* one of them is zero, pick the other */ + end_sym = max (next_file_isym, next_module_isym); + } + + /* As a precaution, check next procedure index too */ + if (!end_sym) + end_sym = next_proc_isym; + else + end_sym = min (end_sym, next_proc_isym); + } + + /* Couldn't find procedure, file, or module, use globals as default */ + if (!end_sym) + end_sym = pxdb_header_p->globals; + +#ifdef DUMPING + if (dumping) + { + printf ("File psymtab indices: %x to %x\n", start_sym, end_sym); + } +#endif + + pst = hpread_end_psymtab (pst, + NULL, /* psymtab_include_list */ + 0, /* includes_used */ + end_sym * sizeof (struct dntt_type_block), + /* byte index in LNTT of end + = capping symbol offset + = LDSYMOFF of nextfile */ + end_adr, /* text high */ + NULL, /* dependency_list */ + 0); /* dependencies_used */ + + record_pst_syms (start_sym, end_sym); + + if (NULL == pst) + warning ("No symbols in psymtab for file \"%s\" [0x%x].", full_name_string, curr_fd); + +#ifdef DUMPING + if (dumping) + { + printf ("Made new psymtab for file %s (%x to %x), sym %x to %x.\n", + full_name_string, start_adr, end_adr, CURR_FILE_ISYM, end_sym); + } +#endif + /* Prepare for the next psymtab. */ + global_syms = objfile->global_psymbols.next; + static_syms = objfile->static_psymbols.next; + free (class_entered); + + curr_fd++; + } /* Psymtab for file */ + else + { + /* We have a module for which we create a psymtab */ + + mod_name_string = &vt_bits[(long) qMD[curr_md].sbMod]; + + /* We will include the code ranges of any files that happen to + overlap with this module */ + + /* So, first pick the lower of the file's and module's start addresses */ + start_adr = CURR_MODULE_START; + if (VALID_CURR_FILE) + { + if (CURR_FILE_START < CURR_MODULE_START) + { + TELL_OBJFILE; + warning ("File \"%s\" [0x%x] crosses beginning of module \"%s\".", + &vt_bits[(long) qFD[curr_fd].sbFile], + curr_fd, mod_name_string); + + start_adr = CURR_FILE_START; + } + } + + /* Also pick the lower of the file's and the module's start symbol indices */ + start_sym = CURR_MODULE_ISYM; + if (VALID_CURR_FILE && (CURR_FILE_ISYM < CURR_MODULE_ISYM)) + start_sym = CURR_FILE_ISYM; + + /* For the end address, we scan through the files till we find one + that overlaps the current module but ends beyond it; if no such file exists we + simply use the module's start address. + (Note, if file entries themselves overlap + we take the longest overlapping extension beyond the end of the module...) + We assume that modules never overlap. */ + + end_adr = CURR_MODULE_END; + + if (VALID_CURR_FILE) + { + while (VALID_CURR_FILE && (CURR_FILE_START < end_adr)) + { + +#ifdef DUMPING + if (dumping) + printf ("Maybe skipping file %s which overlaps with module %s\n", + &vt_bits[(long) qFD[curr_fd].sbFile], mod_name_string); +#endif + if (CURR_FILE_END > end_adr) + { + TELL_OBJFILE; + warning ("File \"%s\" [0x%x] crosses end of module \"%s\".", + &vt_bits[(long) qFD[curr_fd].sbFile], + curr_fd, mod_name_string); + end_adr = CURR_FILE_END; + } + curr_fd++; + } + curr_fd--; /* back up after going too far */ + } + + /* Sometimes (compiler bug -- COBOL) the module end address is higher + than the start address of the next module, so check for that and + adjust accordingly */ + + if (VALID_MODULE (curr_md + 1) && (MODULE_START (curr_md + 1) <= end_adr)) + { + TELL_OBJFILE; + warning ("Module \"%s\" [0x%x] has ending address after starting address of next module; adjusting ending address down.", + mod_name_string, curr_md); + end_adr = MODULE_START (curr_md + 1) - 1; /* Is -4 (or -8 for 64-bit) better? */ + } + if (VALID_FILE (curr_fd + 1) && (FILE_START (curr_fd + 1) <= end_adr)) + { + TELL_OBJFILE; + warning ("Module \"%s\" [0x%x] has ending address after starting address of next file; adjusting ending address down.", + mod_name_string, curr_md); + end_adr = FILE_START (curr_fd + 1) - 1; /* Is -4 (or -8 for 64-bit) better? */ + } + + /* Use one file to get the full name for the module. This + situation can arise if there is executable code in a #include + file. Each file with code in it gets a qFD. Files which don't + contribute code don't get a qFD, even if they include files + which do, e.g.: + + body.c: rtn.h: + int x; int main() { + #include "rtn.h" return x; + } + + There will a qFD for "rtn.h",and a qMD for "body.c", + but no qMD for "rtn.h" or qFD for "body.c"! + + We pick the name of the last file to overlap with this + module. C convention is to put include files first. In a + perfect world, we could check names and use the file whose full + path name ends with the module name. */ + + if (VALID_CURR_FILE) + full_name_string = &vt_bits[(long) qFD[curr_fd].sbFile]; + else + full_name_string = mod_name_string; + + /* Check if there are any procedures not handled until now, that + begin before the start address we have now, and if so, adjust + this psymtab's start address to include them. This handles routines that + are in between file or module ranges for some reason (probably + indicates a compiler bug */ + + if (CURR_PROC_START < start_adr) + { + TELL_OBJFILE; + warning ("Found procedure \"%s\" [0x%x] that is not in any file or module.", + &vt_bits[(long) qPD[curr_pd].sbProc], curr_pd); + start_adr = CURR_PROC_START; + if (CURR_PROC_ISYM < start_sym) + start_sym = CURR_PROC_ISYM; + } + +#ifdef DUMPING + if (dumping) + { + printf ("Make new psymtab for module %s (%x to %x), using file %s\n", + mod_name_string, start_adr, end_adr, full_name_string); + } +#endif + /* Create the basic psymtab, connecting it in the list + for this objfile and pointing its symbol entries + to the current end of the symbol areas in the objfile. + + The "ldsymoff" parameter is the byte offset in the LNTT + of the first symbol in this file. Some day we should + turn this into an index (fix in hp-symtab-read.c as well). + And it's not even the right byte offset, as we're using + the size of a union! FIXME! */ + pst = hpread_start_psymtab (objfile, + section_offsets, /* ?? */ + full_name_string, + start_adr, /* Low text address */ + (start_sym * sizeof (struct dntt_type_block)), + /* ldsymoff */ + global_syms, + static_syms); + + /* Set up to only enter each class referenced in this module once. */ + class_entered = malloc (B_BYTES (pxdb_header_p->cd_entries)); + B_CLRALL (class_entered, pxdb_header_p->cd_entries); + + /* Scan the procedure descriptors for procedures in the current + module, based on the starting addresses. */ + + syms_in_pst = scan_procs (&curr_pd, qPD, pxdb_header_p->pd_entries, + start_adr, end_adr, + pst, vt_bits, objfile, section_offsets); + + /* Get ending symbol offset */ + + end_sym = 0; + /* First check for starting index before previous psymtab */ + if (pst_syms_count && start_sym < pst_syms_array[pst_syms_count - 1].end) + { + end_sym = find_next_pst_start (start_sym); + } + /* Look for next start index of a file or module, or procedure */ + if (!end_sym) + { + int next_file_isym = find_next_file_isym (start_sym, qFD, curr_fd + 1, pxdb_header_p); + int next_module_isym = find_next_module_isym (start_sym, qMD, curr_md + 1, pxdb_header_p); + int next_proc_isym = find_next_proc_isym (start_sym, qPD, curr_pd, pxdb_header_p); + + if (next_file_isym && next_module_isym) + { + /* pick lower of next file or module start index */ + end_sym = min (next_file_isym, next_module_isym); + } + else + { + /* one of them is zero, pick the other */ + end_sym = max (next_file_isym, next_module_isym); + } + + /* As a precaution, check next procedure index too */ + if (!end_sym) + end_sym = next_proc_isym; + else + end_sym = min (end_sym, next_proc_isym); + } + + /* Couldn't find procedure, file, or module, use globals as default */ + if (!end_sym) + end_sym = pxdb_header_p->globals; + +#ifdef DUMPING + if (dumping) + { + printf ("Module psymtab indices: %x to %x\n", start_sym, end_sym); + } +#endif + + pst = hpread_end_psymtab (pst, + NULL, /* psymtab_include_list */ + 0, /* includes_used */ + end_sym * sizeof (struct dntt_type_block), + /* byte index in LNTT of end + = capping symbol offset + = LDSYMOFF of nextfile */ + end_adr, /* text high */ + NULL, /* dependency_list */ + 0); /* dependencies_used */ + + record_pst_syms (start_sym, end_sym); + + if (NULL == pst) + warning ("No symbols in psymtab for module \"%s\" [0x%x].", mod_name_string, curr_md); + +#ifdef DUMPING + if (dumping) + { + printf ("Made new psymtab for module %s (%x to %x), sym %x to %x.\n", + mod_name_string, start_adr, end_adr, CURR_MODULE_ISYM, end_sym); + } +#endif + + /* Prepare for the next psymtab. */ + global_syms = objfile->global_psymbols.next; + static_syms = objfile->static_psymbols.next; + free (class_entered); + + curr_md++; + curr_fd++; + } /* psymtab for module */ + } /* psymtab for non-bogus file or module */ + } /* End of while loop over all files & modules */ + + /* There may be some routines after all files and modules -- these will get + inserted in a separate new module of their own */ + if (VALID_CURR_PROC) + { + start_adr = CURR_PROC_START; + end_adr = qPD[pxdb_header_p->pd_entries - 1].adrEnd; + TELL_OBJFILE; + warning ("Found functions beyond end of all files and modules [0x%x].", curr_pd); +#ifdef DUMPING + if (dumping) + { + printf ("Orphan functions at end, PD %d and beyond (%x to %x)\n", + curr_pd, start_adr, end_adr); + } +#endif + pst = hpread_start_psymtab (objfile, + section_offsets, /* ?? */ + "orphans", + start_adr, /* Low text address */ + (CURR_PROC_ISYM * sizeof (struct dntt_type_block)), + /* ldsymoff */ + global_syms, + static_syms); + + scan_procs (&curr_pd, qPD, pxdb_header_p->pd_entries, + start_adr, end_adr, + pst, vt_bits, objfile, section_offsets); + + pst = hpread_end_psymtab (pst, + NULL, /* psymtab_include_list */ + 0, /* includes_used */ + pxdb_header_p->globals * sizeof (struct dntt_type_block), + /* byte index in LNTT of end + = capping symbol offset + = LDSYMOFF of nextfile */ + end_adr, /* text high */ + NULL, /* dependency_list */ + 0); /* dependencies_used */ + } + + +#ifdef NEVER_NEVER + /* Now build psts for non-module things (in the tail of + the LNTT, after the last END MODULE entry). + + If null psts were kept on the chain, this would be + a solution. FIXME */ + pst = hpread_start_psymtab (objfile, + section_offsets, + "globals", + 0, + (pxdb_header_p->globals + * sizeof (struct dntt_type_block)), + objfile->global_psymbols.next, + objfile->static_psymbols.next); + hpread_end_psymtab (pst, + NULL, 0, + (max_LNTT_sym_index * sizeof (struct dntt_type_block)), + 0, + NULL, 0); +#endif + + clear_pst_syms (); + + return 1; + +} /* End of hpread_quick_traverse. */ + + +/* Get appropriate header, based on pxdb type. + Return value: 1 if ok, 0 if not */ +int +hpread_get_header (objfile, pxdb_header_p) + struct objfile *objfile; + PXDB_header_ptr pxdb_header_p; +{ + asection *pinfo_section, *debug_section, *header_section; + +#ifdef DUMPING + /* Turn on for debugging information */ + static int dumping = 0; +#endif + + header_section = bfd_get_section_by_name (objfile->obfd, "$HEADER$"); + if (!header_section) + { + /* We don't have either PINFO or DEBUG sections. But + stuff like "libc.sl" has no debug info. There's no + need to warn the user of this, as it may be ok. The + caller will figure it out and issue any needed + messages. */ +#ifdef DUMPING + if (dumping) + printf ("==No debug info at all for %s.\n", objfile->name); +#endif + + return 0; + } + + /* We would like either a $DEBUG$ or $PINFO$ section. + Once we know which, we can understand the header + data (which we have defined to suit the more common + $DEBUG$ case). */ + debug_section = bfd_get_section_by_name (objfile->obfd, "$DEBUG$"); + pinfo_section = bfd_get_section_by_name (objfile->obfd, "$PINFO$"); + if (debug_section) + { + /* The expected case: normal pxdb header. */ + bfd_get_section_contents (objfile->obfd, header_section, + pxdb_header_p, 0, sizeof (PXDB_header)); + + if (!pxdb_header_p->pxdbed) + { + /* This shouldn't happen if we check in "symfile.c". */ + return 0; + } /* DEBUG section */ + } + + else if (pinfo_section) + { + /* The DOC case; we need to translate this into a + regular header. */ + DOC_info_PXDB_header doc_header; + +#ifdef DUMPING + if (dumping) + { + printf ("==OOps, PINFO, let's try to handle this, %s.\n", objfile->name); + } +#endif + + bfd_get_section_contents (objfile->obfd, + header_section, + &doc_header, 0, + sizeof (DOC_info_PXDB_header)); + + if (!doc_header.pxdbed) + { + /* This shouldn't happen if we check in "symfile.c". */ + warning ("File \"%s\" not processed by pxdb!", objfile->name); + return 0; + } + + /* Copy relevent fields to standard header passed in. */ + pxdb_header_p->pd_entries = doc_header.pd_entries; + pxdb_header_p->fd_entries = doc_header.fd_entries; + pxdb_header_p->md_entries = doc_header.md_entries; + pxdb_header_p->pxdbed = doc_header.pxdbed; + pxdb_header_p->bighdr = doc_header.bighdr; + pxdb_header_p->sa_header = doc_header.sa_header; + pxdb_header_p->inlined = doc_header.inlined; + pxdb_header_p->globals = doc_header.globals; + pxdb_header_p->time = doc_header.time; + pxdb_header_p->pg_entries = doc_header.pg_entries; + pxdb_header_p->functions = doc_header.functions; + pxdb_header_p->files = doc_header.files; + pxdb_header_p->cd_entries = doc_header.cd_entries; + pxdb_header_p->aa_entries = doc_header.aa_entries; + pxdb_header_p->oi_entries = doc_header.oi_entries; + pxdb_header_p->version = doc_header.version; + } /* PINFO section */ + + else + { +#ifdef DUMPING + if (dumping) + printf ("==No debug info at all for %s.\n", objfile->name); +#endif + + return 0; + + } + + return 1; +} /* End of hpread_get_header */ +#endif /* QUICK_LOOK_UP */ + + +/* Initialization for reading native HP C debug symbols from OBJFILE. + + Its only purpose in life is to set up the symbol reader's private + per-objfile data structures, and read in the raw contents of the debug + sections (attaching pointers to the debug info into the private data + structures). + + 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. Note we may + be called on a file without native HP C debugging symbols. + + FIXME, there should be a cleaner peephole into the BFD environment + here. */ +void +hpread_symfile_init (objfile) + struct objfile *objfile; +{ + asection *vt_section, *slt_section, *lntt_section, *gntt_section; + + /* Allocate struct to keep track of the symfile */ + objfile->sym_private = (PTR) + xmmalloc (objfile->md, sizeof (struct hpread_symfile_info)); + memset (objfile->sym_private, 0, sizeof (struct hpread_symfile_info)); + + /* We haven't read in any types yet. */ + TYPE_VECTOR (objfile) = 0; + + /* Read in data from the $GNTT$ subspace. */ + gntt_section = bfd_get_section_by_name (objfile->obfd, "$GNTT$"); + if (!gntt_section) + return; + + GNTT (objfile) + = obstack_alloc (&objfile->symbol_obstack, + bfd_section_size (objfile->obfd, gntt_section)); + + bfd_get_section_contents (objfile->obfd, gntt_section, GNTT (objfile), + 0, bfd_section_size (objfile->obfd, gntt_section)); + + GNTT_SYMCOUNT (objfile) + = bfd_section_size (objfile->obfd, gntt_section) + / sizeof (struct dntt_type_block); + + /* Read in data from the $LNTT$ subspace. Also keep track of the number + of LNTT symbols. + + FIXME: this could be moved into the psymtab-to-symtab expansion + code, and save startup time. At the moment this data is + still used, though. We'd need a way to tell hp-symtab-read.c + whether or not to load the LNTT. */ + lntt_section = bfd_get_section_by_name (objfile->obfd, "$LNTT$"); + if (!lntt_section) + return; + + LNTT (objfile) + = obstack_alloc (&objfile->symbol_obstack, + bfd_section_size (objfile->obfd, lntt_section)); + + bfd_get_section_contents (objfile->obfd, lntt_section, LNTT (objfile), + 0, bfd_section_size (objfile->obfd, lntt_section)); + + LNTT_SYMCOUNT (objfile) + = bfd_section_size (objfile->obfd, lntt_section) + / sizeof (struct dntt_type_block); + + /* Read in data from the $SLT$ subspace. $SLT$ contains information + on source line numbers. */ + slt_section = bfd_get_section_by_name (objfile->obfd, "$SLT$"); + if (!slt_section) + return; + + SLT (objfile) = + obstack_alloc (&objfile->symbol_obstack, + bfd_section_size (objfile->obfd, slt_section)); + + bfd_get_section_contents (objfile->obfd, slt_section, SLT (objfile), + 0, bfd_section_size (objfile->obfd, slt_section)); + + /* Read in data from the $VT$ subspace. $VT$ contains things like + names and constants. Keep track of the number of symbols in the VT. */ + vt_section = bfd_get_section_by_name (objfile->obfd, "$VT$"); + if (!vt_section) + return; + + VT_SIZE (objfile) = bfd_section_size (objfile->obfd, vt_section); + + VT (objfile) = + (char *) obstack_alloc (&objfile->symbol_obstack, + VT_SIZE (objfile)); + + bfd_get_section_contents (objfile->obfd, vt_section, VT (objfile), + 0, VT_SIZE (objfile)); +} + +/* Scan and build partial symbols for a symbol file. + + The minimal symbol table (either SOM or HP a.out) has already been + read in; all we need to do is setup partial symbols based on the + native debugging information. + + Note that the minimal table is produced by the linker, and has + only global routines in it; the psymtab is based on compiler- + generated debug information and has non-global + routines in it as well as files and class information. + + We assume hpread_symfile_init has been called to initialize the + symbol reader's private data structures. + + SECTION_OFFSETS contains offsets relative to which the symbols in the + various sections are (depending where the sections were actually loaded). + MAINLINE is true if we are reading the main symbol table (as + opposed to a shared lib or dynamically loaded file). */ +void +hpread_build_psymtabs (objfile, section_offsets, mainline) + struct objfile *objfile; + struct section_offsets *section_offsets; + int mainline; +{ + +#ifdef DUMPING + /* Turn this on to get debugging output. */ + static int dumping = 0; +#endif + + char *namestring; + int past_first_source_file = 0; + struct cleanup *old_chain; + + int hp_symnum, symcount, i; + int scan_start = 0; + + union dnttentry *dn_bufp; + unsigned long valu; + char *p; + int texthigh = 0; + int have_name = 0; + + /* 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; + + /* Just in case the stabs reader left turds lying around. */ + free_pending_blocks (); + make_cleanup ((make_cleanup_func) really_free_pendings, 0); + + pst = (struct partial_symtab *) 0; + + /* We shouldn't use alloca, instead use malloc/free. Doing so avoids + a number of problems with cross compilation and creating useless holes + in the stack when we have to allocate new entries. FIXME. */ + + 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 *)); + + old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile); + + last_source_file = 0; + +#ifdef QUICK_LOOK_UP + { + /* Begin code for new-style loading of quick look-up tables. */ + + /* elz: this checks whether the file has beeen processed by pxdb. + If not we would like to try to read the psymbols in + anyway, but it turns out to be not so easy. So this could + actually be commented out, but I leave it in, just in case + we decide to add support for non-pxdb-ed stuff in the future. */ + PXDB_header pxdb_header; + int found_modules_in_program; + + if (hpread_get_header (objfile, &pxdb_header)) + { + /* Build a minimal table. No types, no global variables, + no include files.... */ +#ifdef DUMPING + if (dumping) + printf ("\nNew method for %s\n", objfile->name); +#endif + + /* elz: quick_traverse returns true if it found + some modules in the main source file, other + than those in end.c + In C and C++, all the files have MODULES entries + in the LNTT, and the quick table traverse is all + based on finding these MODULES entries. Without + those it cannot work. + It happens that F77 programs don't have MODULES + so the quick traverse gets confused. F90 programs + have modules, and the quick method still works. + So, if modules (other than those in end.c) are + not found we give up on the quick table stuff, + and fall back on the slower method */ + found_modules_in_program = hpread_quick_traverse (objfile, + section_offsets, + GNTT (objfile), + VT (objfile), + &pxdb_header); + + discard_cleanups (old_chain); + + /* Set up to scan the global section of the LNTT. + + This field is not always correct: if there are + no globals, it will point to the last record in + the regular LNTT, which is usually an END MODULE. + + Since it might happen that there could be a file + with just one global record, there's no way to + tell other than by looking at the record, so that's + done below. */ + if (found_modules_in_program) + scan_start = pxdb_header.globals; + } +#ifdef DUMPING + else + { + if (dumping) + printf ("\nGoing on to old method for %s\n", objfile->name); + } +#endif + } +#endif /* QUICK_LOOK_UP */ + + /* Make two passes, one over the GNTT symbols, the other for the + LNTT symbols. + + JB comment: above isn't true--they only make one pass, over + the LNTT. */ + for (i = 0; i < 1; i++) + { + int within_function = 0; + + if (i) + symcount = GNTT_SYMCOUNT (objfile); + else + symcount = LNTT_SYMCOUNT (objfile); + + + for (hp_symnum = scan_start; hp_symnum < symcount; hp_symnum++) + { + QUIT; + if (i) + dn_bufp = hpread_get_gntt (hp_symnum, objfile); + else + dn_bufp = hpread_get_lntt (hp_symnum, objfile); + + if (dn_bufp->dblock.extension) + continue; + + /* Only handle things which are necessary for minimal symbols. + everything else is ignored. */ + switch (dn_bufp->dblock.kind) + { + case DNTT_TYPE_SRCFILE: + { +#ifdef QUICK_LOOK_UP + if (scan_start == hp_symnum + && symcount == hp_symnum + 1) + { + /* If there are NO globals in an executable, + PXDB's index to the globals will point to + the last record in the file, which + could be this record. (this happened for F77 libraries) + ignore it and be done! */ + continue; + } +#endif /* QUICK_LOOK_UP */ + + /* A source file of some kind. Note this may simply + be an included file. */ + SET_NAMESTRING (dn_bufp, &namestring, objfile); + + /* Check if this is the source file we are already working + with. */ + if (pst && !strcmp (namestring, pst->filename)) + continue; + + /* Check if this is an include file, if so check if we have + already seen it. Add it to the include list */ + p = strrchr (namestring, '.'); + if (!strcmp (p, ".h")) + { + int j, found; + + found = 0; + for (j = 0; j < includes_used; j++) + if (!strcmp (namestring, psymtab_include_list[j])) + { + found = 1; + break; + } + if (found) + continue; + + /* Add it to the list of includes seen so far and + allocate more include space if necessary. */ + psymtab_include_list[includes_used++] = namestring; + if (includes_used >= includes_allocated) + { + char **orig = psymtab_include_list; + + psymtab_include_list = (char **) + alloca ((includes_allocated *= 2) * + sizeof (char *)); + memcpy ((PTR) psymtab_include_list, (PTR) orig, + includes_used * sizeof (char *)); + } + continue; + } + + if (pst) + { + if (!have_name) + { + pst->filename = (char *) + obstack_alloc (&pst->objfile->psymbol_obstack, + strlen (namestring) + 1); + strcpy (pst->filename, namestring); + have_name = 1; + continue; + } + continue; + } + + /* This is a bonafide new source file. + End the current partial symtab and start a new one. */ + + if (pst && past_first_source_file) + { + hpread_end_psymtab (pst, psymtab_include_list, + includes_used, + (hp_symnum + * sizeof (struct dntt_type_block)), + texthigh, + dependency_list, dependencies_used); + pst = (struct partial_symtab *) 0; + includes_used = 0; + dependencies_used = 0; + } + else + past_first_source_file = 1; + + valu = hpread_get_textlow (i, hp_symnum, objfile, symcount); + valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); + pst = hpread_start_psymtab (objfile, section_offsets, + namestring, valu, + (hp_symnum + * sizeof (struct dntt_type_block)), + objfile->global_psymbols.next, + objfile->static_psymbols.next); + texthigh = valu; + have_name = 1; + continue; + } + + case DNTT_TYPE_MODULE: + /* A source file. It's still unclear to me what the + real difference between a DNTT_TYPE_SRCFILE and DNTT_TYPE_MODULE + is supposed to be. */ + + /* First end the previous psymtab */ + if (pst) + { + hpread_end_psymtab (pst, psymtab_include_list, includes_used, + ((hp_symnum - 1) + * sizeof (struct dntt_type_block)), + texthigh, + dependency_list, dependencies_used); + pst = (struct partial_symtab *) 0; + includes_used = 0; + dependencies_used = 0; + have_name = 0; + } + + /* Now begin a new module and a new psymtab for it */ + SET_NAMESTRING (dn_bufp, &namestring, objfile); + valu = hpread_get_textlow (i, hp_symnum, objfile, symcount); + valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); + if (!pst) + { + pst = hpread_start_psymtab (objfile, section_offsets, + namestring, valu, + (hp_symnum + * sizeof (struct dntt_type_block)), + objfile->global_psymbols.next, + objfile->static_psymbols.next); + texthigh = valu; + have_name = 0; + } + continue; + + case DNTT_TYPE_FUNCTION: + case DNTT_TYPE_ENTRY: + /* The beginning of a function. DNTT_TYPE_ENTRY may also denote + a secondary entry point. */ + valu = dn_bufp->dfunc.hiaddr + ANOFFSET (section_offsets, + SECT_OFF_TEXT); + if (valu > texthigh) + texthigh = valu; + valu = dn_bufp->dfunc.lowaddr + + ANOFFSET (section_offsets, SECT_OFF_TEXT); + SET_NAMESTRING (dn_bufp, &namestring, objfile); + if (dn_bufp->dfunc.global) + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->global_psymbols, valu, + 0, language_unknown, objfile); + else + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->static_psymbols, valu, + 0, language_unknown, objfile); + within_function = 1; + continue; + + case DNTT_TYPE_DOC_FUNCTION: + valu = dn_bufp->ddocfunc.hiaddr + ANOFFSET (section_offsets, + SECT_OFF_TEXT); + if (valu > texthigh) + texthigh = valu; + valu = dn_bufp->ddocfunc.lowaddr + + ANOFFSET (section_offsets, SECT_OFF_TEXT); + SET_NAMESTRING (dn_bufp, &namestring, objfile); + if (dn_bufp->ddocfunc.global) + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->global_psymbols, valu, + 0, language_unknown, objfile); + else + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->static_psymbols, valu, + 0, language_unknown, objfile); + within_function = 1; + continue; + + case DNTT_TYPE_BEGIN: + case DNTT_TYPE_END: + /* We don't check MODULE end here, because there can be + symbols beyond the module end which properly belong to the + current psymtab -- so we wait till the next MODULE start */ + + +#ifdef QUICK_LOOK_UP + if (scan_start == hp_symnum + && symcount == hp_symnum + 1) + { + /* If there are NO globals in an executable, + PXDB's index to the globals will point to + the last record in the file, which is + probably an END MODULE, i.e. this record. + ignore it and be done! */ + continue; + } +#endif /* QUICK_LOOK_UP */ + + /* Scope block begin/end. We only care about function + and file blocks right now. */ + + if ((dn_bufp->dend.endkind == DNTT_TYPE_FUNCTION) || + (dn_bufp->dend.endkind == DNTT_TYPE_DOC_FUNCTION)) + within_function = 0; + continue; + + case DNTT_TYPE_SVAR: + case DNTT_TYPE_DVAR: + case DNTT_TYPE_TYPEDEF: + case DNTT_TYPE_TAGDEF: + { + /* Variables, typedefs an the like. */ + enum address_class storage; + namespace_enum namespace; + + /* Don't add locals to the partial symbol table. */ + if (within_function + && (dn_bufp->dblock.kind == DNTT_TYPE_SVAR + || dn_bufp->dblock.kind == DNTT_TYPE_DVAR)) + continue; + + /* TAGDEFs go into the structure namespace. */ + if (dn_bufp->dblock.kind == DNTT_TYPE_TAGDEF) + namespace = STRUCT_NAMESPACE; + else + namespace = VAR_NAMESPACE; + + /* What kind of "storage" does this use? */ + if (dn_bufp->dblock.kind == DNTT_TYPE_SVAR) + storage = LOC_STATIC; + else if (dn_bufp->dblock.kind == DNTT_TYPE_DVAR + && dn_bufp->ddvar.regvar) + storage = LOC_REGISTER; + else if (dn_bufp->dblock.kind == DNTT_TYPE_DVAR) + storage = LOC_LOCAL; + else + storage = LOC_UNDEF; + + SET_NAMESTRING (dn_bufp, &namestring, objfile); + if (!pst) + { + pst = hpread_start_psymtab (objfile, section_offsets, + "globals", 0, + (hp_symnum + * sizeof (struct dntt_type_block)), + objfile->global_psymbols.next, + objfile->static_psymbols.next); + } + + /* Compute address of the data symbol */ + valu = dn_bufp->dsvar.location; + /* Relocate in case it's in a shared library */ + if (storage == LOC_STATIC) + valu += ANOFFSET (section_offsets, SECT_OFF_DATA); + + /* Luckily, dvar, svar, typedef, and tagdef all + have their "global" bit in the same place, so it works + (though it's bad programming practice) to reference + "dsvar.global" even though we may be looking at + any of the above four types. */ + if (dn_bufp->dsvar.global) + { + add_psymbol_to_list (namestring, strlen (namestring), + namespace, storage, + &objfile->global_psymbols, + valu, + 0, language_unknown, objfile); + } + else + { + add_psymbol_to_list (namestring, strlen (namestring), + namespace, storage, + &objfile->static_psymbols, + valu, + 0, language_unknown, objfile); + } + + /* For TAGDEF's, the above code added the tagname to the + struct namespace. This will cause tag "t" to be found + on a reference of the form "(struct t) x". But for + C++ classes, "t" will also be a typename, which we + want to find on a reference of the form "ptype t". + Therefore, we also add "t" to the var namespace. + Do the same for enum's due to the way aCC generates + debug info for these (see more extended comment + in hp-symtab-read.c). + We do the same for templates, so that "ptype t" + where "t" is a template also works. */ + if (dn_bufp->dblock.kind == DNTT_TYPE_TAGDEF && + dn_bufp->dtype.type.dnttp.index < LNTT_SYMCOUNT (objfile)) + { + int global = dn_bufp->dtag.global; + /* Look ahead to see if it's a C++ class */ + dn_bufp = hpread_get_lntt (dn_bufp->dtype.type.dnttp.index, objfile); + if (dn_bufp->dblock.kind == DNTT_TYPE_CLASS || + dn_bufp->dblock.kind == DNTT_TYPE_ENUM || + dn_bufp->dblock.kind == DNTT_TYPE_TEMPLATE) + { + if (global) + { + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, storage, + &objfile->global_psymbols, + dn_bufp->dsvar.location, + 0, language_unknown, objfile); + } + else + { + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, storage, + &objfile->static_psymbols, + dn_bufp->dsvar.location, + 0, language_unknown, objfile); + } + } + } + } + continue; + + case DNTT_TYPE_MEMENUM: + case DNTT_TYPE_CONST: + /* Constants and members of enumerated types. */ + SET_NAMESTRING (dn_bufp, &namestring, objfile); + if (!pst) + { + pst = hpread_start_psymtab (objfile, section_offsets, + "globals", 0, + (hp_symnum + * sizeof (struct dntt_type_block)), + objfile->global_psymbols.next, + objfile->static_psymbols.next); + } + if (dn_bufp->dconst.global) + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_CONST, + &objfile->global_psymbols, 0, + 0, language_unknown, objfile); + else + add_psymbol_to_list (namestring, strlen (namestring), + VAR_NAMESPACE, LOC_CONST, + &objfile->static_psymbols, 0, + 0, language_unknown, objfile); + continue; + default: + continue; + } + } + } + + /* End any pending partial symbol table. */ + if (pst) + { + hpread_end_psymtab (pst, psymtab_include_list, includes_used, + hp_symnum * sizeof (struct dntt_type_block), + 0, dependency_list, dependencies_used); + } + + discard_cleanups (old_chain); +} + +/* 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. */ + +void +hpread_symfile_finish (objfile) + struct objfile *objfile; +{ + if (objfile->sym_private != NULL) + { + mfree (objfile->md, objfile->sym_private); + } +} + + +/* The remaining functions are all for internal use only. */ + +/* Various small functions to get entries in the debug symbol sections. */ + +union dnttentry * +hpread_get_lntt (index, objfile) + int index; + struct objfile *objfile; +{ + return (union dnttentry *) + &(LNTT (objfile)[(index * sizeof (struct dntt_type_block))]); +} + +static union dnttentry * +hpread_get_gntt (index, objfile) + int index; + struct objfile *objfile; +{ + return (union dnttentry *) + &(GNTT (objfile)[(index * sizeof (struct dntt_type_block))]); +} + +union sltentry * +hpread_get_slt (index, objfile) + int index; + struct objfile *objfile; +{ + return (union sltentry *) &(SLT (objfile)[index * sizeof (union sltentry)]); +} + +/* Get the low address associated with some symbol (typically the start + of a particular source file or module). Since that information is not + stored as part of the DNTT_TYPE_MODULE or DNTT_TYPE_SRCFILE symbol we must infer it from + the existance of DNTT_TYPE_FUNCTION symbols. */ + +static unsigned long +hpread_get_textlow (global, index, objfile, symcount) + int global; + int index; + struct objfile *objfile; + int symcount; +{ + union dnttentry *dn_bufp; + struct minimal_symbol *msymbol; + + /* Look for a DNTT_TYPE_FUNCTION symbol. */ + if (index < symcount) /* symcount is the number of symbols in */ + { /* the dbinfo, LNTT table */ + do + { + if (global) + dn_bufp = hpread_get_gntt (index++, objfile); + else + dn_bufp = hpread_get_lntt (index++, objfile); + } + while (dn_bufp->dblock.kind != DNTT_TYPE_FUNCTION + && dn_bufp->dblock.kind != DNTT_TYPE_DOC_FUNCTION + && dn_bufp->dblock.kind != DNTT_TYPE_END + && index < symcount); + } + + /* Avoid going past a DNTT_TYPE_END when looking for a DNTT_TYPE_FUNCTION. This + might happen when a sourcefile has no functions. */ + if (dn_bufp->dblock.kind == DNTT_TYPE_END) + return 0; + + /* Avoid going past the end of the LNTT file */ + if (index == symcount) + return 0; + + /* The minimal symbols are typically more accurate for some reason. */ + if (dn_bufp->dblock.kind == DNTT_TYPE_FUNCTION) + msymbol = lookup_minimal_symbol (dn_bufp->dfunc.name + VT (objfile), NULL, + objfile); + else /* must be a DNTT_TYPE_DOC_FUNCTION */ + msymbol = lookup_minimal_symbol (dn_bufp->ddocfunc.name + VT (objfile), NULL, + objfile); + + if (msymbol) + return SYMBOL_VALUE_ADDRESS (msymbol); + else + return dn_bufp->dfunc.lowaddr; +} + +/* 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 * +hpread_start_psymtab (objfile, section_offsets, + filename, textlow, ldsymoff, global_syms, static_syms) + struct objfile *objfile; + struct section_offsets *section_offsets; + char *filename; + CORE_ADDR textlow; + int ldsymoff; + struct partial_symbol **global_syms; + struct partial_symbol **static_syms; +{ + int offset = ANOFFSET (section_offsets, SECT_OFF_TEXT); + extern void hpread_psymtab_to_symtab (); + struct partial_symtab *result = + start_psymtab_common (objfile, section_offsets, + filename, textlow, global_syms, static_syms); + + result->textlow += offset; + result->read_symtab_private = (char *) + obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); + LDSYMOFF (result) = ldsymoff; + result->read_symtab = hpread_psymtab_to_symtab; + + return result; +} + + +/* Close off the current usage of PST. + Returns PST or NULL if the partial symtab was empty and thrown away. + + capping_symbol_offset --Byte index in LNTT or GNTT of the + last symbol processed during the build + of the previous pst. + + FIXME: List variables and peculiarities of same. */ + +static struct partial_symtab * +hpread_end_psymtab (pst, include_list, num_includes, capping_symbol_offset, + capping_text, dependency_list, number_dependencies) + 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 i; + struct objfile *objfile = pst->objfile; + int offset = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT); + +#ifdef DUMPING + /* Turn on to see what kind of a psymtab we've built. */ + static int dumping = 0; +#endif + + if (capping_symbol_offset != -1) + LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst); + else + LDSYMLEN (pst) = 0; + pst->texthigh = capping_text + offset; + + 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); + +#ifdef DUMPING + if (dumping) + { + printf ("\nPst %s, LDSYMOFF %x (%x), LDSYMLEN %x (%x), globals %d, statics %d\n", + pst->filename, + LDSYMOFF (pst), + LDSYMOFF (pst) / sizeof (struct dntt_type_block), + LDSYMLEN (pst), + LDSYMLEN (pst) / sizeof (struct dntt_type_block), + pst->n_global_syms, pst->n_static_syms); + } +#endif + + 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) + { + /* 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. + It's also wrong if we're using the quick look-up tables, as + we can get empty psymtabs from modules with no routines in + them. */ + + discard_psymtab (pst); + + /* Indicate that psymtab was thrown away. */ + pst = (struct partial_symtab *) NULL; + + } + return pst; +} + + +/* End of hp-psymtab-read.c */ + +/* Set indentation to 4 spaces for Emacs; this file is + mostly non-GNU-ish in its style :-( */ +#if 0 +***Local Variables: +***c - basic - offset:4 +*** End: +#endif + + |
