diff options
Diffstat (limited to 'gdb/xcoffread.c')
| -rw-r--r-- | gdb/xcoffread.c | 3049 |
1 files changed, 0 insertions, 3049 deletions
diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c deleted file mode 100644 index 0e85125..0000000 --- a/gdb/xcoffread.c +++ /dev/null @@ -1,3049 +0,0 @@ -/* Read AIX xcoff symbol tables and convert to internal format, for GDB. - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, - 1996, 1997, 1998, 1999, 2000, 2001 - Free Software Foundation, Inc. - Derived from coffread.c, dbxread.c, and a lot of hacking. - Contributed by IBM Corporation. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "bfd.h" - -#include <sys/types.h> -#include <fcntl.h> -#include <ctype.h> -#include "gdb_string.h" - -#include <sys/param.h> -#ifndef NO_SYS_FILE -#include <sys/file.h> -#endif -#include "gdb_stat.h" - -#include "coff/internal.h" -#include "libcoff.h" /* FIXME, internal data from BFD */ -#include "coff/xcoff.h" -#include "libxcoff.h" -#include "coff/rs6000.h" - -#include "symtab.h" -#include "gdbtypes.h" -#include "symfile.h" -#include "objfiles.h" -#include "buildsym.h" -#include "stabsread.h" -#include "expression.h" -#include "complaints.h" - -#include "gdb-stabs.h" - -/* For interface with stabsread.c. */ -#include "aout/stab_gnu.h" - - -/* We put a pointer to this structure in the read_symtab_private field - of the psymtab. */ - -struct symloc - { - - /* First symbol number for this file. */ - - int first_symnum; - - /* Number of symbols in 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 numsyms is 0, the only - reason for this thing's existence is the dependency list. Nothing - else will happen when it is read in. */ - - int numsyms; - - /* Position of the start of the line number information for this psymtab. */ - unsigned int lineno_off; - }; - -/* Remember what we deduced to be the source language of this psymtab. */ - -static enum language psymtab_language = language_unknown; - - -/* Simplified internal version of coff symbol table information */ - -struct coff_symbol - { - char *c_name; - int c_symnum; /* symbol number of this entry */ - int c_naux; /* 0 if syment only, 1 if syment + auxent */ - long c_value; - unsigned char c_sclass; - int c_secnum; - unsigned int c_type; - }; - -/* last function's saved coff symbol `cs' */ - -static struct coff_symbol fcn_cs_saved; - -static bfd *symfile_bfd; - -/* Core address of start and end of text of current source file. - This is calculated from the first function seen after a C_FILE - symbol. */ - - -static CORE_ADDR cur_src_end_addr; - -/* Core address of the end of the first object file. */ - -static CORE_ADDR first_object_file_end; - -/* initial symbol-table-debug-string vector length */ - -#define INITIAL_STABVECTOR_LENGTH 40 - -/* Nonzero if within a function (so symbols should be local, - if nothing says specifically). */ - -int within_function; - -/* Size of a COFF symbol. I think it is always 18, so I'm not sure - there is any reason not to just use a #define, but might as well - ask BFD for the size and store it here, I guess. */ - -static unsigned local_symesz; - -struct coff_symfile_info - { - file_ptr min_lineno_offset; /* Where in file lowest line#s are */ - file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ - - /* Pointer to the string table. */ - char *strtbl; - - /* Pointer to debug section. */ - char *debugsec; - - /* Pointer to the a.out symbol table. */ - char *symtbl; - - /* Number of symbols in symtbl. */ - int symtbl_num_syms; - - /* Offset in data section to TOC anchor. */ - CORE_ADDR toc_offset; - }; - -static struct complaint storclass_complaint = -{"Unexpected storage class: %d", 0, 0}; - -static struct complaint bf_notfound_complaint = -{"line numbers off, `.bf' symbol not found", 0, 0}; - -static struct complaint ef_complaint = -{"Mismatched .ef symbol ignored starting at symnum %d", 0, 0}; - -static struct complaint eb_complaint = -{"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; - -static void xcoff_initial_scan (struct objfile *, int); - -static void scan_xcoff_symtab (struct objfile *); - -static char *xcoff_next_symbol_text (struct objfile *); - -static void record_include_begin (struct coff_symbol *); - -static void -enter_line_range (struct subfile *, unsigned, unsigned, - CORE_ADDR, CORE_ADDR, unsigned *); - -static void init_stringtab (bfd *, file_ptr, struct objfile *); - -static void xcoff_symfile_init (struct objfile *); - -static void xcoff_new_init (struct objfile *); - -static void xcoff_symfile_finish (struct objfile *); - -static void -xcoff_symfile_offsets (struct objfile *, struct section_addr_info *addrs); - -static void find_linenos (bfd *, sec_ptr, PTR); - -static char *coff_getfilename (union internal_auxent *, struct objfile *); - -static void read_symbol (struct internal_syment *, int); - -static int read_symbol_lineno (int); - -static CORE_ADDR read_symbol_nvalue (int); - -static struct symbol *process_xcoff_symbol (struct coff_symbol *, - struct objfile *); - -static void read_xcoff_symtab (struct partial_symtab *); - -#if 0 -static void add_stab_to_list (char *, struct pending_stabs **); -#endif - -static int compare_lte (const void *, const void *); - -static struct linetable *arrange_linetable (struct linetable *); - -static void record_include_end (struct coff_symbol *); - -static void process_linenos (CORE_ADDR, CORE_ADDR); - - -/* Translate from a COFF section number (target_index) to a SECT_OFF_* - code. */ -static int secnum_to_section (int, struct objfile *); -static asection *secnum_to_bfd_section (int, struct objfile *); - -struct find_targ_sec_arg - { - int targ_index; - int *resultp; - asection **bfd_sect; - struct objfile *objfile; - }; - -static void find_targ_sec (bfd *, asection *, void *); - -static void -find_targ_sec (bfd *abfd, asection *sect, PTR obj) -{ - struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; - struct objfile *objfile = args->objfile; - if (sect->target_index == args->targ_index) - { - /* This is the section. Figure out what SECT_OFF_* code it is. */ - if (bfd_get_section_flags (abfd, sect) & SEC_CODE) - *args->resultp = SECT_OFF_TEXT (objfile); - else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) - *args->resultp = SECT_OFF_DATA (objfile); - else - *args->resultp = sect->index; - *args->bfd_sect = sect; - } -} - -/* Return the section number (SECT_OFF_*) that CS points to. */ -static int -secnum_to_section (int secnum, struct objfile *objfile) -{ - int off = SECT_OFF_TEXT (objfile); - asection *sect = NULL; - struct find_targ_sec_arg args; - args.targ_index = secnum; - args.resultp = &off; - args.bfd_sect = § - args.objfile = objfile; - bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); - return off; -} - -/* Return the BFD section that CS points to. */ -static asection * -secnum_to_bfd_section (int secnum, struct objfile *objfile) -{ - int off = SECT_OFF_TEXT (objfile); - asection *sect = NULL; - struct find_targ_sec_arg args; - args.targ_index = secnum; - args.resultp = &off; - args.bfd_sect = § - args.objfile = objfile; - bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); - return sect; -} - -/* add a given stab string into given stab vector. */ - -#if 0 - -static void -add_stab_to_list (char *stabname, struct pending_stabs **stabvector) -{ - if (*stabvector == NULL) - { - *stabvector = (struct pending_stabs *) - xmalloc (sizeof (struct pending_stabs) + - INITIAL_STABVECTOR_LENGTH * sizeof (char *)); - (*stabvector)->count = 0; - (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; - } - else if ((*stabvector)->count >= (*stabvector)->length) - { - (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; - *stabvector = (struct pending_stabs *) - xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + - (*stabvector)->length * sizeof (char *)); - } - (*stabvector)->stab[(*stabvector)->count++] = stabname; -} - -#endif - /* *INDENT-OFF* */ -/* Linenos are processed on a file-by-file basis. - - Two reasons: - - 1) xlc (IBM's native c compiler) postpones static function code - emission to the end of a compilation unit. This way it can - determine if those functions (statics) are needed or not, and - can do some garbage collection (I think). This makes line - numbers and corresponding addresses unordered, and we end up - with a line table like: - - - lineno addr - foo() 10 0x100 - 20 0x200 - 30 0x300 - - foo3() 70 0x400 - 80 0x500 - 90 0x600 - - static foo2() - 40 0x700 - 50 0x800 - 60 0x900 - - and that breaks gdb's binary search on line numbers, if the - above table is not sorted on line numbers. And that sort - should be on function based, since gcc can emit line numbers - like: - - 10 0x100 - for the init/test part of a for stmt. - 20 0x200 - 30 0x300 - 10 0x400 - for the increment part of a for stmt. - - arrange_linetable() will do this sorting. - - 2) aix symbol table might look like: - - c_file // beginning of a new file - .bi // beginning of include file - .ei // end of include file - .bi - .ei - - basically, .bi/.ei pairs do not necessarily encapsulate - their scope. They need to be recorded, and processed later - on when we come the end of the compilation unit. - Include table (inclTable) and process_linenos() handle - that. */ -/* *INDENT-ON* */ - - - -/* compare line table entry addresses. */ - -static int -compare_lte (const void *lte1p, const void *lte2p) -{ - struct linetable_entry *lte1 = (struct linetable_entry *) lte1p; - struct linetable_entry *lte2 = (struct linetable_entry *) lte2p; - return lte1->pc - lte2->pc; -} - -/* Given a line table with function entries are marked, arrange its functions - in ascending order and strip off function entry markers and return it in - a newly created table. If the old one is good enough, return the old one. */ -/* FIXME: I think all this stuff can be replaced by just passing - sort_linevec = 1 to end_symtab. */ - -static struct linetable * -arrange_linetable (struct linetable *oldLineTb) -{ - int ii, jj, newline, /* new line count */ - function_count; /* # of functions */ - - struct linetable_entry *fentry; /* function entry vector */ - int fentry_size; /* # of function entries */ - struct linetable *newLineTb; /* new line table */ - -#define NUM_OF_FUNCTIONS 20 - - fentry_size = NUM_OF_FUNCTIONS; - fentry = (struct linetable_entry *) - xmalloc (fentry_size * sizeof (struct linetable_entry)); - - for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii) - { - - if (oldLineTb->item[ii].line == 0) - { /* function entry found. */ - - if (function_count >= fentry_size) - { /* make sure you have room. */ - fentry_size *= 2; - fentry = (struct linetable_entry *) - xrealloc (fentry, fentry_size * sizeof (struct linetable_entry)); - } - fentry[function_count].line = ii; - fentry[function_count].pc = oldLineTb->item[ii].pc; - ++function_count; - } - } - - if (function_count == 0) - { - xfree (fentry); - return oldLineTb; - } - else if (function_count > 1) - qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte); - - /* allocate a new line table. */ - newLineTb = (struct linetable *) - xmalloc - (sizeof (struct linetable) + - (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); - - /* if line table does not start with a function beginning, copy up until - a function begin. */ - - newline = 0; - if (oldLineTb->item[0].line != 0) - for (newline = 0; - newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) - newLineTb->item[newline] = oldLineTb->item[newline]; - - /* Now copy function lines one by one. */ - - for (ii = 0; ii < function_count; ++ii) - { - for (jj = fentry[ii].line + 1; - jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; - ++jj, ++newline) - newLineTb->item[newline] = oldLineTb->item[jj]; - } - xfree (fentry); - newLineTb->nitems = oldLineTb->nitems - function_count; - return newLineTb; -} - -/* include file support: C_BINCL/C_EINCL pairs will be kept in the - following `IncludeChain'. At the end of each symtab (end_symtab), - we will determine if we should create additional symtab's to - represent if (the include files. */ - - -typedef struct _inclTable -{ - char *name; /* include filename */ - - /* Offsets to the line table. end points to the last entry which is - part of this include file. */ - int begin, end; - - struct subfile *subfile; - unsigned funStartLine; /* start line # of its function */ -} -InclTable; - -#define INITIAL_INCLUDE_TABLE_LENGTH 20 -static InclTable *inclTable; /* global include table */ -static int inclIndx; /* last entry to table */ -static int inclLength; /* table length */ -static int inclDepth; /* nested include depth */ - -static void allocate_include_entry (void); - -static void -record_include_begin (struct coff_symbol *cs) -{ - if (inclDepth) - { - /* In xcoff, we assume include files cannot be nested (not in .c files - of course, but in corresponding .s files.). */ - - /* This can happen with old versions of GCC. - GCC 2.3.3-930426 does not exhibit this on a test case which - a user said produced the message for him. */ - static struct complaint msg = - {"Nested C_BINCL symbols", 0, 0}; - complain (&msg); - } - ++inclDepth; - - allocate_include_entry (); - - inclTable[inclIndx].name = cs->c_name; - inclTable[inclIndx].begin = cs->c_value; -} - -static void -record_include_end (struct coff_symbol *cs) -{ - InclTable *pTbl; - - if (inclDepth == 0) - { - static struct complaint msg = - {"Mismatched C_BINCL/C_EINCL pair", 0, 0}; - complain (&msg); - } - - allocate_include_entry (); - - pTbl = &inclTable[inclIndx]; - pTbl->end = cs->c_value; - - --inclDepth; - ++inclIndx; -} - -static void -allocate_include_entry (void) -{ - if (inclTable == NULL) - { - inclTable = (InclTable *) - xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); - memset (inclTable, - '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); - inclLength = INITIAL_INCLUDE_TABLE_LENGTH; - inclIndx = 0; - } - else if (inclIndx >= inclLength) - { - inclLength += INITIAL_INCLUDE_TABLE_LENGTH; - inclTable = (InclTable *) - xrealloc (inclTable, sizeof (InclTable) * inclLength); - memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, - '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); - } -} - -/* Global variable to pass the psymtab down to all the routines involved - in psymtab to symtab processing. */ -static struct partial_symtab *this_symtab_psymtab; - -/* given the start and end addresses of a compilation unit (or a csect, - at times) process its lines and create appropriate line vectors. */ - -static void -process_linenos (CORE_ADDR start, CORE_ADDR end) -{ - int offset, ii; - file_ptr max_offset = - ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) - ->max_lineno_offset; - - /* subfile structure for the main compilation unit. */ - struct subfile main_subfile; - - /* In the main source file, any time we see a function entry, we - reset this variable to function's absolute starting line number. - All the following line numbers in the function are relative to - this, and we record absolute line numbers in record_line(). */ - - unsigned int main_source_baseline = 0; - - unsigned *firstLine; - - offset = - ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; - if (offset == 0) - goto return_after_cleanup; - - memset (&main_subfile, '\0', sizeof (main_subfile)); - - if (inclIndx == 0) - /* All source lines were in the main source file. None in include files. */ - - enter_line_range (&main_subfile, offset, 0, start, end, - &main_source_baseline); - - else - { - /* There was source with line numbers in include files. */ - - int linesz = - coff_data (this_symtab_psymtab->objfile->obfd)->local_linesz; - main_source_baseline = 0; - - for (ii = 0; ii < inclIndx; ++ii) - { - struct subfile *tmpSubfile; - - /* If there is main file source before include file, enter it. */ - if (offset < inclTable[ii].begin) - { - enter_line_range - (&main_subfile, offset, inclTable[ii].begin - linesz, - start, 0, &main_source_baseline); - } - - /* Have a new subfile for the include file. */ - - tmpSubfile = inclTable[ii].subfile = - (struct subfile *) xmalloc (sizeof (struct subfile)); - - memset (tmpSubfile, '\0', sizeof (struct subfile)); - firstLine = &(inclTable[ii].funStartLine); - - /* Enter include file's lines now. */ - enter_line_range (tmpSubfile, inclTable[ii].begin, - inclTable[ii].end, start, 0, firstLine); - - if (offset <= inclTable[ii].end) - offset = inclTable[ii].end + linesz; - } - - /* All the include files' line have been processed at this point. Now, - enter remaining lines of the main file, if any left. */ - if (offset < max_offset + 1 - linesz) - { - enter_line_range (&main_subfile, offset, 0, start, end, - &main_source_baseline); - } - } - - /* Process main file's line numbers. */ - if (main_subfile.line_vector) - { - struct linetable *lineTb, *lv; - - lv = main_subfile.line_vector; - - /* Line numbers are not necessarily ordered. xlc compilation will - put static function to the end. */ - - lineTb = arrange_linetable (lv); - if (lv == lineTb) - { - current_subfile->line_vector = (struct linetable *) - xrealloc (lv, (sizeof (struct linetable) - + lv->nitems * sizeof (struct linetable_entry))); - } - else - { - xfree (lv); - current_subfile->line_vector = lineTb; - } - - current_subfile->line_vector_length = - current_subfile->line_vector->nitems; - } - - /* Now, process included files' line numbers. */ - - for (ii = 0; ii < inclIndx; ++ii) - { - if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */ - { - struct linetable *lineTb, *lv; - - lv = (inclTable[ii].subfile)->line_vector; - - /* Line numbers are not necessarily ordered. xlc compilation will - put static function to the end. */ - - lineTb = arrange_linetable (lv); - - push_subfile (); - - /* For the same include file, we might want to have more than one - subfile. This happens if we have something like: - - ...... - #include "foo.h" - ...... - #include "foo.h" - ...... - - while foo.h including code in it. (stupid but possible) - Since start_subfile() looks at the name and uses an - existing one if finds, we need to provide a fake name and - fool it. */ - -#if 0 - start_subfile (inclTable[ii].name, (char *) 0); -#else - { - /* Pick a fake name that will produce the same results as this - one when passed to deduce_language_from_filename. Kludge on - top of kludge. */ - char *fakename = strrchr (inclTable[ii].name, '.'); - if (fakename == NULL) - fakename = " ?"; - start_subfile (fakename, (char *) 0); - xfree (current_subfile->name); - } - current_subfile->name = xstrdup (inclTable[ii].name); -#endif - - if (lv == lineTb) - { - current_subfile->line_vector = - (struct linetable *) xrealloc - (lv, (sizeof (struct linetable) - + lv->nitems * sizeof (struct linetable_entry))); - - } - else - { - xfree (lv); - current_subfile->line_vector = lineTb; - } - - current_subfile->line_vector_length = - current_subfile->line_vector->nitems; - start_subfile (pop_subfile (), (char *) 0); - } - } - -return_after_cleanup: - - /* We don't want to keep alloc/free'ing the global include file table. */ - inclIndx = 0; - - /* Start with a fresh subfile structure for the next file. */ - memset (&main_subfile, '\0', sizeof (struct subfile)); -} - -void -aix_process_linenos (void) -{ - /* process line numbers and enter them into line vector */ - process_linenos (last_source_start_addr, cur_src_end_addr); -} - - -/* Enter a given range of lines into the line vector. - can be called in the following two ways: - enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or - enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) - - endoffset points to the last line table entry that we should pay - attention to. */ - -static void -enter_line_range (struct subfile *subfile, unsigned beginoffset, unsigned endoffset, /* offsets to line table */ - CORE_ADDR startaddr, /* offsets to line table */ - CORE_ADDR endaddr, unsigned *firstLine) -{ - unsigned int curoffset; - CORE_ADDR addr; - void *ext_lnno; - struct internal_lineno int_lnno; - unsigned int limit_offset; - bfd *abfd; - int linesz; - - if (endoffset == 0 && startaddr == 0 && endaddr == 0) - return; - curoffset = beginoffset; - limit_offset = - ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) - ->max_lineno_offset; - - if (endoffset != 0) - { - if (endoffset >= limit_offset) - { - static struct complaint msg = - {"Bad line table offset in C_EINCL directive", 0, 0}; - complain (&msg); - return; - } - limit_offset = endoffset; - } - else - limit_offset -= 1; - - abfd = this_symtab_psymtab->objfile->obfd; - linesz = coff_data (abfd)->local_linesz; - ext_lnno = alloca (linesz); - - while (curoffset <= limit_offset) - { - bfd_seek (abfd, curoffset, SEEK_SET); - bfd_bread (ext_lnno, linesz, abfd); - bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno); - - /* Find the address this line represents. */ - addr = (int_lnno.l_lnno - ? int_lnno.l_addr.l_paddr - : read_symbol_nvalue (int_lnno.l_addr.l_symndx)); - addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets, - SECT_OFF_TEXT (this_symtab_psymtab->objfile)); - - if (addr < startaddr || (endaddr && addr >= endaddr)) - return; - - if (int_lnno.l_lnno == 0) - { - *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); - record_line (subfile, 0, addr); - --(*firstLine); - } - else - record_line (subfile, *firstLine + int_lnno.l_lnno, addr); - curoffset += linesz; - } -} - - -/* Save the vital information for use when closing off the current file. - NAME is the file name the symbols came from, START_ADDR is the first - text address for the file, and SIZE is the number of bytes of text. */ - -#define complete_symtab(name, start_addr) { \ - last_source_file = savestring (name, strlen (name)); \ - last_source_start_addr = start_addr; \ -} - - -/* 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. */ - -/* Reading symbol table has to be fast! Keep the followings as macros, rather - than functions. */ - -#define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \ -{ \ - char *namestr; \ - namestr = (NAME); \ - if (namestr[0] == '.') ++namestr; \ - prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \ - (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \ - misc_func_recorded = 1; \ -} - - -/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be - nested. At any given time, a symbol can only be in one static block. - This is the base address of current static block, zero if non exists. */ - -static int static_block_base = 0; - -/* Section number for the current static block. */ - -static int static_block_section = -1; - -/* true if space for symbol name has been allocated. */ - -static int symname_alloced = 0; - -/* Next symbol to read. Pointer into raw seething symbol table. */ - -static char *raw_symbol; - -/* This is the function which stabsread.c calls to get symbol - continuations. */ - -static char * -xcoff_next_symbol_text (struct objfile *objfile) -{ - struct internal_syment symbol; - static struct complaint msg = - {"Unexpected symbol continuation", 0, 0}; - char *retval; - /* FIXME: is this the same as the passed arg? */ - objfile = this_symtab_psymtab->objfile; - - bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol); - if (symbol.n_zeroes) - { - complain (&msg); - - /* Return something which points to '\0' and hope the symbol reading - code does something reasonable. */ - retval = ""; - } - else if (symbol.n_sclass & 0x80) - { - retval = - ((struct coff_symfile_info *) objfile->sym_private)->debugsec - + symbol.n_offset; - raw_symbol += - coff_data (objfile->obfd)->local_symesz; - ++symnum; - } - else - { - complain (&msg); - - /* Return something which points to '\0' and hope the symbol reading - code does something reasonable. */ - retval = ""; - } - return retval; -} - -/* Read symbols for a given partial symbol table. */ - -static void -read_xcoff_symtab (struct partial_symtab *pst) -{ - struct objfile *objfile = pst->objfile; - bfd *abfd = objfile->obfd; - char *raw_auxptr; /* Pointer to first raw aux entry for sym */ - char *strtbl = ((struct coff_symfile_info *) objfile->sym_private)->strtbl; - char *debugsec = - ((struct coff_symfile_info *) objfile->sym_private)->debugsec; - char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF"; - - struct internal_syment symbol[1]; - union internal_auxent main_aux; - struct coff_symbol cs[1]; - CORE_ADDR file_start_addr = 0; - CORE_ADDR file_end_addr = 0; - - int next_file_symnum = -1; - unsigned int max_symnum; - int just_started = 1; - int depth = 0; - int fcn_start_addr = 0; - - struct coff_symbol fcn_stab_saved; - - /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ - union internal_auxent fcn_aux_saved; - struct context_stack *new; - - char *filestring = " _start_ "; /* Name of the current file. */ - - char *last_csect_name; /* last seen csect's name and value */ - CORE_ADDR last_csect_val; - int last_csect_sec; - - this_symtab_psymtab = pst; - - /* Get the appropriate COFF "constants" related to the file we're - handling. */ - local_symesz = coff_data (abfd)->local_symesz; - - last_source_file = NULL; - last_csect_name = 0; - last_csect_val = 0; - - start_stabs (); - start_symtab (filestring, (char *) NULL, file_start_addr); - record_debugformat (debugfmt); - symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum; - max_symnum = - symnum + ((struct symloc *) pst->read_symtab_private)->numsyms; - first_object_file_end = 0; - - raw_symbol = - ((struct coff_symfile_info *) objfile->sym_private)->symtbl - + symnum * local_symesz; - - while (symnum < max_symnum) - { - - QUIT; /* make this command interruptable. */ - - /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ - /* read one symbol into `cs' structure. After processing the - whole symbol table, only string table will be kept in memory, - symbol table and debug section of xcoff will be freed. Thus - we can mark symbols with names in string table as - `alloced'. */ - { - int ii; - - /* Swap and align the symbol into a reasonable C structure. */ - bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); - - cs->c_symnum = symnum; - cs->c_naux = symbol->n_numaux; - if (symbol->n_zeroes) - { - symname_alloced = 0; - /* We must use the original, unswapped, name here so the name field - pointed to by cs->c_name will persist throughout xcoffread. If - we use the new field, it gets overwritten for each symbol. */ - cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name; - /* If it's exactly E_SYMNMLEN characters long it isn't - '\0'-terminated. */ - if (cs->c_name[E_SYMNMLEN - 1] != '\0') - { - char *p; - p = obstack_alloc (&objfile->symbol_obstack, E_SYMNMLEN + 1); - strncpy (p, cs->c_name, E_SYMNMLEN); - p[E_SYMNMLEN] = '\0'; - cs->c_name = p; - symname_alloced = 1; - } - } - else if (symbol->n_sclass & 0x80) - { - cs->c_name = debugsec + symbol->n_offset; - symname_alloced = 0; - } - else - { - /* in string table */ - cs->c_name = strtbl + (int) symbol->n_offset; - symname_alloced = 1; - } - cs->c_value = symbol->n_value; - cs->c_sclass = symbol->n_sclass; - cs->c_secnum = symbol->n_scnum; - cs->c_type = (unsigned) symbol->n_type; - - raw_symbol += local_symesz; - ++symnum; - - /* Save addr of first aux entry. */ - raw_auxptr = raw_symbol; - - /* Skip all the auxents associated with this symbol. */ - for (ii = symbol->n_numaux; ii; --ii) - { - raw_symbol += coff_data (abfd)->local_auxesz; - ++symnum; - } - } - - /* if symbol name starts with ".$" or "$", ignore it. */ - if (cs->c_name[0] == '$' - || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) - continue; - - if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) - { - if (last_source_file) - { - pst->symtab = - end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT (objfile)); - end_stabs (); - } - - start_stabs (); - start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0); - record_debugformat (debugfmt); - cur_src_end_addr = first_object_file_end; - /* done with all files, everything from here on is globals */ - } - - if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) - && cs->c_naux == 1) - { - /* Dealing with a symbol with a csect entry. */ - -#define CSECT(PP) ((PP)->x_csect) -#define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l) -#define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) -#define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) -#define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) - - /* Convert the auxent to something we can access. */ - bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, - 0, cs->c_naux, &main_aux); - - switch (CSECT_SMTYP (&main_aux)) - { - - case XTY_ER: - /* Ignore all external references. */ - continue; - - case XTY_SD: - /* A section description. */ - { - switch (CSECT_SCLAS (&main_aux)) - { - - case XMC_PR: - { - - /* A program csect is seen. We have to allocate one - symbol table for each program csect. Normally gdb - prefers one symtab for each source file. In case - of AIX, one source file might include more than one - [PR] csect, and they don't have to be adjacent in - terms of the space they occupy in memory. Thus, one - single source file might get fragmented in the - memory and gdb's file start and end address - approach does not work! GCC (and I think xlc) seem - to put all the code in the unnamed program csect. */ - - if (last_csect_name) - { - complete_symtab (filestring, file_start_addr); - cur_src_end_addr = file_end_addr; - end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); - end_stabs (); - start_stabs (); - /* Give all csects for this source file the same - name. */ - start_symtab (filestring, NULL, (CORE_ADDR) 0); - record_debugformat (debugfmt); - } - - /* If this is the very first csect seen, - basically `__start'. */ - if (just_started) - { - first_object_file_end - = cs->c_value + CSECT_LEN (&main_aux); - just_started = 0; - } - - file_start_addr = - cs->c_value + ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile)); - file_end_addr = file_start_addr + CSECT_LEN (&main_aux); - - if (cs->c_name && (cs->c_name[0] == '.' - || cs->c_name[0] == '@')) - { - last_csect_name = cs->c_name; - last_csect_val = cs->c_value; - last_csect_sec = secnum_to_section (cs->c_secnum, objfile); - } - } - continue; - - /* All other symbols are put into the minimal symbol - table only. */ - - case XMC_RW: - continue; - - case XMC_TC0: - continue; - - case XMC_TC: - continue; - - default: - /* Ignore the symbol. */ - continue; - } - } - break; - - case XTY_LD: - - switch (CSECT_SCLAS (&main_aux)) - { - case XMC_PR: - /* a function entry point. */ - function_entry_point: - - fcn_start_addr = cs->c_value; - - /* save the function header info, which will be used - when `.bf' is seen. */ - fcn_cs_saved = *cs; - fcn_aux_saved = main_aux; - continue; - - case XMC_GL: - /* shared library function trampoline code entry point. */ - continue; - - case XMC_DS: - /* The symbols often have the same names as debug symbols for - functions, and confuse lookup_symbol. */ - continue; - - default: - /* xlc puts each variable in a separate csect, so we get - an XTY_SD for each variable. But gcc puts several - variables in a csect, so that each variable only gets - an XTY_LD. This will typically be XMC_RW; I suspect - XMC_RO and XMC_BS might be possible too. - These variables are put in the minimal symbol table - only. */ - continue; - } - break; - - case XTY_CM: - /* Common symbols are put into the minimal symbol table only. */ - continue; - - default: - break; - } - } - - /* If explicitly specified as a function, treat is as one. This check - evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur - after the above CSECT check. */ - if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) - { - bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, - 0, cs->c_naux, &main_aux); - goto function_entry_point; - } - - switch (cs->c_sclass) - { - - case C_FILE: - - /* c_value field contains symnum of next .file entry in table - or symnum of first global after last .file. */ - - next_file_symnum = cs->c_value; - - /* Complete symbol table for last object file containing - debugging information. */ - - /* Whether or not there was a csect in the previous file, we - have to call `end_stabs' and `start_stabs' to reset - type_vector, line_vector, etc. structures. */ - - complete_symtab (filestring, file_start_addr); - cur_src_end_addr = file_end_addr; - end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); - end_stabs (); - - /* XCOFF, according to the AIX 3.2 documentation, puts the filename - in cs->c_name. But xlc 1.3.0.2 has decided to do things the - standard COFF way and put it in the auxent. We use the auxent if - the symbol is ".file" and an auxent exists, otherwise use the symbol - itself. Simple enough. */ - if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0) - { - bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, - 0, cs->c_naux, &main_aux); - filestring = coff_getfilename (&main_aux, objfile); - } - else - filestring = cs->c_name; - - start_stabs (); - start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0); - record_debugformat (debugfmt); - last_csect_name = 0; - - /* reset file start and end addresses. A compilation unit with no text - (only data) should have zero file boundaries. */ - file_start_addr = file_end_addr = 0; - break; - - case C_FUN: - fcn_stab_saved = *cs; - break; - - case C_FCN: - if (STREQ (cs->c_name, ".bf")) - { - CORE_ADDR off = ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile)); - bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, - 0, cs->c_naux, &main_aux); - - within_function = 1; - - new = push_context (0, fcn_start_addr + off); - - new->name = define_symbol - (fcn_cs_saved.c_value + off, - fcn_stab_saved.c_name, 0, 0, objfile); - if (new->name != NULL) - SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile); - } - else if (STREQ (cs->c_name, ".ef")) - { - - bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, - 0, cs->c_naux, &main_aux); - - /* The value of .ef is the address of epilogue code; - not useful for gdb. */ - /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno - contains number of lines to '}' */ - - if (context_stack_depth <= 0) - { /* We attempted to pop an empty context stack */ - complain (&ef_complaint, cs->c_symnum); - within_function = 0; - break; - } - new = pop_context (); - /* Stack must be empty now. */ - if (context_stack_depth > 0 || new == NULL) - { - complain (&ef_complaint, cs->c_symnum); - within_function = 0; - break; - } - - finish_block (new->name, &local_symbols, new->old_blocks, - new->start_addr, - (fcn_cs_saved.c_value - + fcn_aux_saved.x_sym.x_misc.x_fsize - + ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile))), - objfile); - within_function = 0; - } - break; - - case C_BSTAT: - /* Begin static block. */ - { - struct internal_syment symbol; - - read_symbol (&symbol, cs->c_value); - static_block_base = symbol.n_value; - static_block_section = - secnum_to_section (symbol.n_scnum, objfile); - } - break; - - case C_ESTAT: - /* End of static block. */ - static_block_base = 0; - static_block_section = -1; - break; - - case C_ARG: - case C_REGPARM: - case C_REG: - case C_TPDEF: - case C_STRTAG: - case C_UNTAG: - case C_ENTAG: - { - static struct complaint msg = - {"Unrecognized storage class %d.", 0, 0}; - complain (&msg, cs->c_sclass); - } - break; - - case C_LABEL: - case C_NULL: - /* Ignore these. */ - break; - - case C_HIDEXT: - case C_STAT: - break; - - case C_BINCL: - /* beginning of include file */ - /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted - order. Thus, when wee see them, we might not know enough info - to process them. Thus, we'll be saving them into a table - (inclTable) and postpone their processing. */ - - record_include_begin (cs); - break; - - case C_EINCL: - /* End of include file. */ - /* See the comment after case C_BINCL. */ - record_include_end (cs); - break; - - case C_BLOCK: - if (STREQ (cs->c_name, ".bb")) - { - depth++; - new = push_context (depth, - (cs->c_value - + ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile)))); - } - else if (STREQ (cs->c_name, ".eb")) - { - if (context_stack_depth <= 0) - { /* We attempted to pop an empty context stack */ - complain (&eb_complaint, cs->c_symnum); - break; - } - new = pop_context (); - if (depth-- != new->depth) - { - complain (&eb_complaint, cs->c_symnum); - break; - } - if (local_symbols && context_stack_depth > 0) - { - /* Make a block for the local symbols within. */ - finish_block (new->name, &local_symbols, new->old_blocks, - new->start_addr, - (cs->c_value - + ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile))), - objfile); - } - local_symbols = new->locals; - } - break; - - default: - process_xcoff_symbol (cs, objfile); - break; - } - } - - if (last_source_file) - { - struct symtab *s; - - complete_symtab (filestring, file_start_addr); - cur_src_end_addr = file_end_addr; - s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); - /* When reading symbols for the last C_FILE of the objfile, try - to make sure that we set pst->symtab to the symtab for the - file, not to the _globals_ symtab. I'm not sure whether this - actually works right or when/if it comes up. */ - if (pst->symtab == NULL) - pst->symtab = s; - end_stabs (); - } -} - -#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ - (SYMBOL2) = (struct symbol *) \ - obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ - *(SYMBOL2) = *(SYMBOL1); - - -#define SYMNAME_ALLOC(NAME, ALLOCED) \ - (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack); - - -static struct type *func_symbol_type; -static struct type *var_symbol_type; - -/* process one xcoff symbol. */ - -static struct symbol * -process_xcoff_symbol (register struct coff_symbol *cs, struct objfile *objfile) -{ - struct symbol onesymbol; - register struct symbol *sym = &onesymbol; - struct symbol *sym2 = NULL; - char *name, *pp; - - int sec; - CORE_ADDR off; - - if (cs->c_secnum < 0) - { - /* The value is a register number, offset within a frame, etc., - and does not get relocated. */ - off = 0; - sec = -1; - } - else - { - sec = secnum_to_section (cs->c_secnum, objfile); - off = ANOFFSET (objfile->section_offsets, sec); - } - - name = cs->c_name; - if (name[0] == '.') - ++name; - - memset (sym, '\0', sizeof (struct symbol)); - - /* default assumptions */ - SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off; - SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; - SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile); - - if (ISFCN (cs->c_type)) - { - /* At this point, we don't know the type of the function. This - will be patched with the type from its stab entry later on in - patch_block_stabs (), unless the file was compiled without -g. */ - - SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); - SYMBOL_TYPE (sym) = func_symbol_type; - - SYMBOL_CLASS (sym) = LOC_BLOCK; - SYMBOL_DUP (sym, sym2); - - if (cs->c_sclass == C_EXT) - add_symbol_to_list (sym2, &global_symbols); - else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) - add_symbol_to_list (sym2, &file_symbols); - } - else - { - /* In case we can't figure out the type, provide default. */ - SYMBOL_TYPE (sym) = var_symbol_type; - - switch (cs->c_sclass) - { -#if 0 - /* The values of functions and global symbols are now resolved - via the global_sym_chain in stabsread.c. */ - case C_FUN: - if (fcn_cs_saved.c_sclass == C_EXT) - add_stab_to_list (name, &global_stabs); - else - add_stab_to_list (name, &file_stabs); - break; - - case C_GSYM: - add_stab_to_list (name, &global_stabs); - break; -#endif - - case C_BCOMM: - common_block_start (cs->c_name, objfile); - break; - - case C_ECOMM: - common_block_end (objfile); - break; - - default: - complain (&storclass_complaint, cs->c_sclass); - /* FALLTHROUGH */ - - case C_DECL: - case C_PSYM: - case C_RPSYM: - case C_ECOML: - case C_LSYM: - case C_RSYM: - case C_GSYM: - - { - sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile); - if (sym != NULL) - { - SYMBOL_SECTION (sym) = sec; - } - return sym; - } - - case C_STSYM: - - /* For xlc (not GCC), the 'V' symbol descriptor is used for - all statics and we need to distinguish file-scope versus - function-scope using within_function. We do this by - changing the string we pass to define_symbol to use 'S' - where we need to, which is not necessarily super-clean, - but seems workable enough. */ - - if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) - return NULL; - - ++pp; - if (*pp == 'V' && !within_function) - *pp = 'S'; - sym = define_symbol ((cs->c_value - + ANOFFSET (objfile->section_offsets, - static_block_section)), - cs->c_name, 0, 0, objfile); - if (sym != NULL) - { - SYMBOL_VALUE_ADDRESS (sym) += static_block_base; - SYMBOL_SECTION (sym) = static_block_section; - } - return sym; - - } - } - return sym2; -} - -/* Extract the file name from the aux entry of a C_FILE symbol. - Result is in static storage and is only good for temporary use. */ - -static char * -coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile) -{ - static char buffer[BUFSIZ]; - - if (aux_entry->x_file.x_n.x_zeroes == 0) - strcpy (buffer, - ((struct coff_symfile_info *) objfile->sym_private)->strtbl - + aux_entry->x_file.x_n.x_offset); - else - { - strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); - buffer[FILNMLEN] = '\0'; - } - return (buffer); -} - -/* Set *SYMBOL to symbol number symno in symtbl. */ -static void -read_symbol (struct internal_syment *symbol, int symno) -{ - int nsyms = - ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) - ->symtbl_num_syms; - char *stbl = - ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) - ->symtbl; - if (symno < 0 || symno >= nsyms) - { - static struct complaint msg = - {"Invalid symbol offset", 0, 0}; - complain (&msg); - symbol->n_value = 0; - symbol->n_scnum = -1; - return; - } - bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd, - stbl + (symno * local_symesz), - symbol); -} - -/* Get value corresponding to symbol number symno in symtbl. */ - -static CORE_ADDR -read_symbol_nvalue (int symno) -{ - struct internal_syment symbol[1]; - - read_symbol (symbol, symno); - return symbol->n_value; -} - - -/* Find the address of the function corresponding to symno, where - symno is the symbol pointed to by the linetable. */ - -static int -read_symbol_lineno (int symno) -{ - struct objfile *objfile = this_symtab_psymtab->objfile; - boolean xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd); - - struct coff_symfile_info *info = - (struct coff_symfile_info *)objfile->sym_private; - int nsyms = info->symtbl_num_syms; - char *stbl = info->symtbl; - char *strtbl = info->strtbl; - - struct internal_syment symbol[1]; - union internal_auxent main_aux[1]; - - if (symno < 0) - { - complain (&bf_notfound_complaint); - return 0; - } - - /* Note that just searching for a short distance (e.g. 50 symbols) - is not enough, at least in the following case. - - .extern foo - [many .stabx entries] - [a few functions, referring to foo] - .globl foo - .bf - - What happens here is that the assembler moves the .stabx entries - to right before the ".bf" for foo, but the symbol for "foo" is before - all the stabx entries. See PR gdb/2222. */ - - /* Maintaining a table of .bf entries might be preferable to this search. - If I understand things correctly it would need to be done only for - the duration of a single psymtab to symtab conversion. */ - while (symno < nsyms) - { - bfd_coff_swap_sym_in (symfile_bfd, - stbl + (symno * local_symesz), symbol); - if (symbol->n_sclass == C_FCN) - { - char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name; - if (STREQ (name, ".bf")) - goto gotit; - } - symno += symbol->n_numaux + 1; - } - - complain (&bf_notfound_complaint); - return 0; - -gotit: - /* take aux entry and return its lineno */ - symno++; - bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz, - symbol->n_type, symbol->n_sclass, - 0, symbol->n_numaux, main_aux); - - return main_aux->x_sym.x_misc.x_lnsz.x_lnno; -} - -/* Support for line number handling */ - -/* This function is called for every section; it finds the outer limits - * of the line table (minimum and maximum file offset) so that the - * mainline code can read the whole thing for efficiency. - */ -static void -find_linenos (bfd *abfd, sec_ptr asect, PTR vpinfo) -{ - struct coff_symfile_info *info; - int size, count; - file_ptr offset, maxoff; - - count = asect->lineno_count; - - if (!STREQ (asect->name, ".text") || count == 0) - return; - - size = count * coff_data (abfd)->local_linesz; - info = (struct coff_symfile_info *) vpinfo; - offset = asect->line_filepos; - maxoff = offset + size; - - if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) - info->min_lineno_offset = offset; - - if (maxoff > info->max_lineno_offset) - info->max_lineno_offset = maxoff; -} - -static void xcoff_psymtab_to_symtab_1 (struct partial_symtab *); - -static void -xcoff_psymtab_to_symtab_1 (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); - } - xcoff_psymtab_to_symtab_1 (pst->dependencies[i]); - } - - if (((struct symloc *) pst->read_symtab_private)->numsyms != 0) - { - /* Init stuff necessary for reading in symbols. */ - stabsread_init (); - buildsym_init (); - old_chain = make_cleanup (really_free_pendings, 0); - - read_xcoff_symtab (pst); - sort_symtab_syms (pst->symtab); - - do_cleanups (old_chain); - } - - pst->readin = 1; -} - -static void xcoff_psymtab_to_symtab (struct partial_symtab *); - -/* Read in all of the symbols for a given psymtab for real. - Be verbose about it if the user wants that. */ - -static void -xcoff_psymtab_to_symtab (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 (((struct symloc *) pst->read_symtab_private)->numsyms != 0 - || 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 = xcoff_next_symbol_text; - - xcoff_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"); - } -} - -static void -xcoff_new_init (struct objfile *objfile) -{ - stabsread_new_init (); - buildsym_new_init (); -} - -/* Do initialization in preparation for reading symbols from OBJFILE. - - We will only be called if this is an XCOFF or XCOFF-like file. - BFD handles figuring out the format of the file, and code in symfile.c - uses BFD's determination to vector to us. */ - -static void -xcoff_symfile_init (struct objfile *objfile) -{ - /* Allocate struct to keep track of the symfile */ - objfile->sym_private = xmmalloc (objfile->md, - sizeof (struct coff_symfile_info)); - - /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we - find this causes a significant slowdown in gdb then we could - set it in the debug symbol readers only when necessary. */ - objfile->flags |= OBJF_REORDERED; - - init_entry_point_info (objfile); -} - -/* 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 -xcoff_symfile_finish (struct objfile *objfile) -{ - if (objfile->sym_private != NULL) - { - xmfree (objfile->md, objfile->sym_private); - } - - /* Start with a fresh include table for the next objfile. */ - if (inclTable) - { - xfree (inclTable); - inclTable = NULL; - } - inclIndx = inclLength = inclDepth = 0; -} - - -static void -init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile) -{ - long length; - int val; - unsigned char lengthbuf[4]; - char *strtbl; - - ((struct coff_symfile_info *) objfile->sym_private)->strtbl = NULL; - - if (bfd_seek (abfd, offset, SEEK_SET) < 0) - error ("cannot seek to string table in %s: %s", - bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); - - val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); - length = bfd_h_get_32 (abfd, lengthbuf); - - /* If no string table is needed, then the file may end immediately - after the symbols. Just return with `strtbl' set to NULL. */ - - if (val != sizeof lengthbuf || length < sizeof lengthbuf) - return; - - /* Allocate string table from symbol_obstack. We will need this table - as long as we have its symbol table around. */ - - strtbl = (char *) obstack_alloc (&objfile->symbol_obstack, length); - ((struct coff_symfile_info *) objfile->sym_private)->strtbl = strtbl; - - /* Copy length buffer, the first byte is usually zero and is - used for stabs with a name length of zero. */ - memcpy (strtbl, lengthbuf, sizeof lengthbuf); - if (length == sizeof lengthbuf) - return; - - val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd); - - if (val != length - sizeof lengthbuf) - error ("cannot read string table from %s: %s", - bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); - if (strtbl[length - 1] != '\0') - error ("bad symbol file: string table does not end with null character"); - - return; -} - -/* If we have not yet seen a function for this psymtab, this is 0. If we - have seen one, it is the offset in the line numbers of the line numbers - for the psymtab. */ -static unsigned int first_fun_line_offset; - -static struct partial_symtab *xcoff_start_psymtab - (struct objfile *, char *, int, - struct partial_symbol **, struct partial_symbol **); - -/* 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 * -xcoff_start_psymtab (struct objfile *objfile, char *filename, int first_symnum, - struct partial_symbol **global_syms, - struct partial_symbol **static_syms) -{ - struct partial_symtab *result = - start_psymtab_common (objfile, objfile->section_offsets, - filename, - /* We fill in textlow later. */ - 0, - global_syms, static_syms); - - result->read_symtab_private = (char *) - obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); - ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum; - result->read_symtab = xcoff_psymtab_to_symtab; - - /* Deduce the source language from the filename for this psymtab. */ - psymtab_language = deduce_language_from_filename (filename); - - return result; -} - -static struct partial_symtab *xcoff_end_psymtab - (struct partial_symtab *, char **, int, int, - struct partial_symtab **, int, int); - -/* Close off the current usage of PST. - Returns PST, or NULL if the partial symtab was empty and thrown away. - - CAPPING_SYMBOL_NUMBER is the end of pst (exclusive). - - INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES - are the information for includes and dependencies. */ - -static struct partial_symtab * -xcoff_end_psymtab (struct partial_symtab *pst, char **include_list, - int num_includes, int capping_symbol_number, - struct partial_symtab **dependency_list, - int number_dependencies, int textlow_not_set) -{ - int i; - struct objfile *objfile = pst->objfile; - - if (capping_symbol_number != -1) - ((struct symloc *) pst->read_symtab_private)->numsyms = - capping_symbol_number - - ((struct symloc *) pst->read_symtab_private)->first_symnum; - ((struct symloc *) pst->read_symtab_private)->lineno_off = - first_fun_line_offset; - first_fun_line_offset = 0; - 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)); - ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0; - ((struct symloc *) subpst->read_symtab_private)->numsyms = 0; - subpst->textlow = 0; - 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. */ - - discard_psymtab (pst); - - /* Indicate that psymtab was thrown away. */ - pst = (struct partial_symtab *) NULL; - } - return pst; -} - -static void swap_sym (struct internal_syment *, - union internal_auxent *, char **, char **, - unsigned int *, struct objfile *); - -/* Swap raw symbol at *RAW and put the name in *NAME, the symbol in - *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over - the symbol and its auxents. */ - -static void -swap_sym (struct internal_syment *symbol, union internal_auxent *aux, - char **name, char **raw, unsigned int *symnump, - struct objfile *objfile) -{ - bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol); - if (symbol->n_zeroes) - { - /* If it's exactly E_SYMNMLEN characters long it isn't - '\0'-terminated. */ - if (symbol->n_name[E_SYMNMLEN - 1] != '\0') - { - /* FIXME: wastes memory for symbols which we don't end up putting - into the minimal symbols. */ - char *p; - p = obstack_alloc (&objfile->psymbol_obstack, E_SYMNMLEN + 1); - strncpy (p, symbol->n_name, E_SYMNMLEN); - p[E_SYMNMLEN] = '\0'; - *name = p; - } - else - /* Point to the unswapped name as that persists as long as the - objfile does. */ - *name = ((struct external_syment *) *raw)->e.e_name; - } - else if (symbol->n_sclass & 0x80) - { - *name = ((struct coff_symfile_info *) objfile->sym_private)->debugsec - + symbol->n_offset; - } - else - { - *name = ((struct coff_symfile_info *) objfile->sym_private)->strtbl - + symbol->n_offset; - } - ++*symnump; - *raw += coff_data (objfile->obfd)->local_symesz; - if (symbol->n_numaux > 0) - { - bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type, - symbol->n_sclass, 0, symbol->n_numaux, aux); - - *symnump += symbol->n_numaux; - *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux; - } -} - -static void -scan_xcoff_symtab (struct objfile *objfile) -{ - CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ - char *filestring = NULL; - - char *namestring; - int past_first_source_file = 0; - bfd *abfd; - asection *bfd_sect; - unsigned int nsyms; - - /* 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; - - char *sraw_symbol; - struct internal_syment symbol; - union internal_auxent main_aux[5]; - unsigned int ssymnum; - - char *last_csect_name = NULL; /* last seen csect's name and value */ - CORE_ADDR last_csect_val = 0; - int last_csect_sec = 0; - int misc_func_recorded = 0; /* true if any misc. function */ - int textlow_not_set = 1; - - 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 *)); - - last_source_file = NULL; - - abfd = objfile->obfd; - - sraw_symbol = ((struct coff_symfile_info *) objfile->sym_private)->symtbl; - nsyms = ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms; - ssymnum = 0; - while (ssymnum < nsyms) - { - int sclass; - - QUIT; - - bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol); - sclass = symbol.n_sclass; - - switch (sclass) - { - case C_EXT: - case C_HIDEXT: - { - /* The CSECT auxent--always the last auxent. */ - union internal_auxent csect_aux; - unsigned int symnum_before = ssymnum; - - swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, - &ssymnum, objfile); - if (symbol.n_numaux > 1) - { - bfd_coff_swap_aux_in - (objfile->obfd, - sraw_symbol - coff_data (abfd)->local_symesz, - symbol.n_type, - symbol.n_sclass, - symbol.n_numaux - 1, - symbol.n_numaux, - &csect_aux); - } - else - csect_aux = main_aux[0]; - - /* If symbol name starts with ".$" or "$", ignore it. */ - if (namestring[0] == '$' - || (namestring[0] == '.' && namestring[1] == '$')) - break; - - switch (csect_aux.x_csect.x_smtyp & 0x7) - { - case XTY_SD: - switch (csect_aux.x_csect.x_smclas) - { - case XMC_PR: - if (last_csect_name) - { - /* If no misc. function recorded in the last - seen csect, enter it as a function. This - will take care of functions like strcmp() - compiled by xlc. */ - - if (!misc_func_recorded) - { - RECORD_MINIMAL_SYMBOL - (last_csect_name, last_csect_val, - mst_text, last_csect_sec, - objfile); - } - - if (pst != NULL) - { - /* We have to allocate one psymtab for - each program csect, because their text - sections need not be adjacent. */ - xcoff_end_psymtab - (pst, psymtab_include_list, includes_used, - symnum_before, dependency_list, - dependencies_used, textlow_not_set); - includes_used = 0; - dependencies_used = 0; - /* Give all psymtabs for this source file the same - name. */ - pst = xcoff_start_psymtab - (objfile, - filestring, - symnum_before, - objfile->global_psymbols.next, - objfile->static_psymbols.next); - } - } - /* Activate the misc_func_recorded mechanism for - compiler- and linker-generated CSECTs like ".strcmp" - and "@FIX1". */ - if (namestring && (namestring[0] == '.' - || namestring[0] == '@')) - { - last_csect_name = namestring; - last_csect_val = symbol.n_value; - last_csect_sec = - secnum_to_section (symbol.n_scnum, objfile); - } - if (pst != NULL) - { - CORE_ADDR highval = - symbol.n_value + csect_aux.x_csect.x_scnlen.l; - if (highval > pst->texthigh) - pst->texthigh = highval; - if (pst->textlow == 0 || symbol.n_value < pst->textlow) - pst->textlow = symbol.n_value; - } - misc_func_recorded = 0; - break; - - case XMC_RW: - case XMC_TD: - /* Data variables are recorded in the minimal symbol - table, except for section symbols. */ - if (*namestring != '.') - prim_record_minimal_symbol_and_info - (namestring, symbol.n_value, - sclass == C_HIDEXT ? mst_file_data : mst_data, - NULL, secnum_to_section (symbol.n_scnum, objfile), - NULL, objfile); - break; - - case XMC_TC0: - if (toc_offset) - warning ("More than one XMC_TC0 symbol found."); - toc_offset = symbol.n_value; - - /* Make TOC offset relative to start address of section. */ - bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile); - if (bfd_sect) - toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect); - break; - - case XMC_TC: - /* These symbols tell us where the TOC entry for a - variable is, not the variable itself. */ - break; - - default: - break; - } - break; - - case XTY_LD: - switch (csect_aux.x_csect.x_smclas) - { - case XMC_PR: - /* A function entry point. */ - - if (first_fun_line_offset == 0 && symbol.n_numaux > 1) - first_fun_line_offset = - main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr; - RECORD_MINIMAL_SYMBOL - (namestring, symbol.n_value, - sclass == C_HIDEXT ? mst_file_text : mst_text, - secnum_to_section (symbol.n_scnum, objfile), - objfile); - break; - - case XMC_GL: - /* shared library function trampoline code entry - point. */ - - /* record trampoline code entries as - mst_solib_trampoline symbol. When we lookup mst - symbols, we will choose mst_text over - mst_solib_trampoline. */ - RECORD_MINIMAL_SYMBOL - (namestring, symbol.n_value, - mst_solib_trampoline, - secnum_to_section (symbol.n_scnum, objfile), - objfile); - break; - - case XMC_DS: - /* The symbols often have the same names as - debug symbols for functions, and confuse - lookup_symbol. */ - break; - - default: - - /* xlc puts each variable in a separate csect, - so we get an XTY_SD for each variable. But - gcc puts several variables in a csect, so - that each variable only gets an XTY_LD. We - still need to record them. This will - typically be XMC_RW; I suspect XMC_RO and - XMC_BS might be possible too. */ - if (*namestring != '.') - prim_record_minimal_symbol_and_info - (namestring, symbol.n_value, - sclass == C_HIDEXT ? mst_file_data : mst_data, - NULL, secnum_to_section (symbol.n_scnum, objfile), - NULL, objfile); - break; - } - break; - - case XTY_CM: - switch (csect_aux.x_csect.x_smclas) - { - case XMC_RW: - case XMC_BS: - /* Common variables are recorded in the minimal symbol - table, except for section symbols. */ - if (*namestring != '.') - prim_record_minimal_symbol_and_info - (namestring, symbol.n_value, - sclass == C_HIDEXT ? mst_file_bss : mst_bss, - NULL, secnum_to_section (symbol.n_scnum, objfile), - NULL, objfile); - break; - } - break; - - default: - break; - } - } - break; - case C_FILE: - { - unsigned int symnum_before; - - symnum_before = ssymnum; - swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, - &ssymnum, objfile); - - /* See if the last csect needs to be recorded. */ - - if (last_csect_name && !misc_func_recorded) - { - - /* If no misc. function recorded in the last seen csect, enter - it as a function. This will take care of functions like - strcmp() compiled by xlc. */ - - RECORD_MINIMAL_SYMBOL - (last_csect_name, last_csect_val, - mst_text, last_csect_sec, objfile); - } - - if (pst) - { - xcoff_end_psymtab (pst, psymtab_include_list, includes_used, - symnum_before, dependency_list, - dependencies_used, textlow_not_set); - includes_used = 0; - dependencies_used = 0; - } - first_fun_line_offset = 0; - - /* XCOFF, according to the AIX 3.2 documentation, puts the - filename in cs->c_name. But xlc 1.3.0.2 has decided to - do things the standard COFF way and put it in the auxent. - We use the auxent if the symbol is ".file" and an auxent - exists, otherwise use the symbol itself. */ - if (!strcmp (namestring, ".file") && symbol.n_numaux > 0) - { - filestring = coff_getfilename (&main_aux[0], objfile); - } - else - filestring = namestring; - - pst = xcoff_start_psymtab (objfile, - filestring, - symnum_before, - objfile->global_psymbols.next, - objfile->static_psymbols.next); - last_csect_name = NULL; - } - break; - - default: - { - static struct complaint msg = - {"Storage class %d not recognized during scan", 0, 0}; - complain (&msg, sclass); - } - /* FALLTHROUGH */ - - /* C_FCN is .bf and .ef symbols. I think it is sufficient - to handle only the C_FUN and C_EXT. */ - case C_FCN: - - case C_BSTAT: - case C_ESTAT: - case C_ARG: - case C_REGPARM: - case C_REG: - case C_TPDEF: - case C_STRTAG: - case C_UNTAG: - case C_ENTAG: - case C_LABEL: - case C_NULL: - - /* C_EINCL means we are switching back to the main file. But there - is no reason to care; the only thing we want to know about - includes is the names of all the included (.h) files. */ - case C_EINCL: - - case C_BLOCK: - - /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be - used instead. */ - case C_STAT: - - /* I don't think the name of the common block (as opposed to the - variables within it) is something which is user visible - currently. */ - case C_BCOMM: - case C_ECOMM: - - case C_PSYM: - case C_RPSYM: - - /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL - so C_LSYM would appear to be only for locals. */ - case C_LSYM: - - case C_AUTO: - case C_RSYM: - { - /* We probably could save a few instructions by assuming that - C_LSYM, C_PSYM, etc., never have auxents. */ - int naux1 = symbol.n_numaux + 1; - ssymnum += naux1; - sraw_symbol += bfd_coff_symesz (abfd) * naux1; - } - break; - - case C_BINCL: - { - /* Mark down an include file in the current psymtab */ - enum language tmp_language; - swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, - &ssymnum, objfile); - - tmp_language = deduce_language_from_filename (namestring); - - /* Only change the psymtab's language if we've learned - something useful (eg. tmp_language is not language_unknown). - In addition, to match what start_subfile does, never change - from C++ to C. */ - if (tmp_language != language_unknown - && (tmp_language != language_c - || psymtab_language != language_cplus)) - psymtab_language = tmp_language; - - /* In C++, one may expect the same filename to come round many - times, when code is coming alternately from the main file - and from inline functions in other files. So I check to see - if this is a file we've seen before -- either the main - source file, or a previously included file. - - This seems to be a lot of time to be spending on N_SOL, but - things like "break c-exp.y:435" need to work (I - suppose the psymtab_include_list could be hashed or put - in a binary tree, if profiling shows this is a major hog). */ - if (pst && STREQ (namestring, pst->filename)) - continue; - { - register int i; - for (i = 0; i < includes_used; i++) - if (STREQ (namestring, psymtab_include_list[i])) - { - i = -1; - break; - } - if (i == -1) - continue; - } - 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; - } - case C_FUN: - /* The value of the C_FUN is not the address of the function (it - appears to be the address before linking), but as long as it - is smaller than the actual address, then find_pc_partial_function - will use the minimal symbols instead. I hope. */ - - case C_GSYM: - case C_ECOML: - case C_DECL: - case C_STSYM: - { - - static struct complaint function_outside_compilation_unit = { - "function `%s' appears to be defined outside of all compilation units", 0, 0 - }; - - char *p; - swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, - &ssymnum, objfile); - - p = (char *) strchr (namestring, ':'); - if (!p) - continue; /* Not a debugging symbol. */ - - /* Main processing section for debugging symbols which - the initial read through the symbol tables needs to worry - about. If we reach this point, the symbol which we are - considering is definitely one we are interested in. - p must also contain the (valid) index into the namestring - which indicates the debugging type symbol. */ - - switch (p[1]) - { - case 'S': - symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); -#ifdef STATIC_TRANSFORM_NAME - namestring = STATIC_TRANSFORM_NAME (namestring); -#endif - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_STATIC, - &objfile->static_psymbols, - 0, symbol.n_value, - psymtab_language, objfile); - continue; - - case 'G': - symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - /* The addresses in these entries are reported to be - wrong. See the code that reads 'G's for symtabs. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_STATIC, - &objfile->global_psymbols, - 0, symbol.n_value, - psymtab_language, objfile); - continue; - - case 'T': - /* When a 'T' entry is defining an anonymous enum, it - may have a name which is the empty string, or a - single space. Since they're not really defining a - symbol, those shouldn't go in the partial symbol - table. We do pick up the elements of such enums at - 'check_enum:', below. */ - if (p >= namestring + 2 - || (p == namestring + 1 - && namestring[0] != ' ')) - { - add_psymbol_to_list (namestring, p - namestring, - STRUCT_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - symbol.n_value, 0, - psymtab_language, objfile); - if (p[2] == 't') - { - /* Also a typedef with the same name. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - symbol.n_value, 0, - psymtab_language, objfile); - p += 1; - } - /* The semantics of C++ state that "struct foo { ... }" - also defines a typedef for "foo". Unfortuantely, cfront - never makes the typedef when translating from C++ to C. - We make the typedef here so that "ptype foo" works as - expected for cfront translated code. */ - else if (psymtab_language == language_cplus) - { - /* Also a typedef with the same name. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - symbol.n_value, 0, - psymtab_language, objfile); - } - } - goto check_enum; - - case 't': - if (p != namestring) /* a name is there, not just :T... */ - { - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - symbol.n_value, 0, - psymtab_language, objfile); - } - check_enum: - /* If this is an enumerated type, we need to - add all the enum constants to the partial symbol - table. This does not cover enums without names, e.g. - "enum {a, b} c;" in C, but fortunately those are - rare. There is no way for GDB to find those from the - enum type without spending too much time on it. Thus - to solve this problem, the compiler needs to put out the - enum in a nameless type. GCC2 does this. */ - - /* We are looking for something of the form - <name> ":" ("t" | "T") [<number> "="] "e" - {<constant> ":" <value> ","} ";". */ - - /* Skip over the colon and the 't' or 'T'. */ - p += 2; - /* This type may be given a number. Also, numbers can come - in pairs like (0,26). Skip over it. */ - while ((*p >= '0' && *p <= '9') - || *p == '(' || *p == ',' || *p == ')' - || *p == '=') - p++; - - if (*p++ == 'e') - { - /* The aix4 compiler emits extra crud before the members. */ - if (*p == '-') - { - /* Skip over the type (?). */ - while (*p != ':') - p++; - - /* Skip over the colon. */ - p++; - } - - /* We have found an enumerated type. */ - /* According to comments in read_enum_type - a comma could end it instead of a semicolon. - I don't know where that happens. - Accept either. */ - while (*p && *p != ';' && *p != ',') - { - char *q; - - /* Check for and handle cretinous dbx symbol name - continuation! */ - if (*p == '\\' || (*p == '?' && p[1] == '\0')) - p = next_symbol_text (objfile); - - /* Point to the character after the name - of the enum constant. */ - for (q = p; *q && *q != ':'; q++) - ; - /* Note that the value doesn't matter for - enum constants in psymtabs, just in symtabs. */ - add_psymbol_to_list (p, q - p, - VAR_NAMESPACE, LOC_CONST, - &objfile->static_psymbols, 0, - 0, psymtab_language, objfile); - /* Point past the name. */ - p = q; - /* Skip over the value. */ - while (*p && *p != ',') - p++; - /* Advance past the comma. */ - if (*p) - p++; - } - } - continue; - - case 'c': - /* Constant, e.g. from "const" in Pascal. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_CONST, - &objfile->static_psymbols, symbol.n_value, - 0, psymtab_language, objfile); - continue; - - case 'f': - if (! pst) - { - int name_len = p - namestring; - char *name = xmalloc (name_len + 1); - memcpy (name, namestring, name_len); - name[name_len] = '\0'; - complain (&function_outside_compilation_unit, name); - xfree (name); - } - symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_BLOCK, - &objfile->static_psymbols, - 0, symbol.n_value, - psymtab_language, objfile); - continue; - - /* Global functions were ignored here, but now they - are put into the global psymtab like one would expect. - They're also in the minimal symbol table. */ - case 'F': - if (! pst) - { - int name_len = p - namestring; - char *name = xmalloc (name_len + 1); - memcpy (name, namestring, name_len); - name[name_len] = '\0'; - complain (&function_outside_compilation_unit, name); - xfree (name); - } - symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_BLOCK, - &objfile->global_psymbols, - 0, symbol.n_value, - psymtab_language, objfile); - continue; - - /* Two things show up here (hopefully); static symbols of - local scope (static used inside braces) or extensions - of structure symbols. We can ignore both. */ - case 'V': - case '(': - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - case '-': - case '#': /* for symbol identification (used in live ranges) */ - /* added to support cfront stabs strings */ - case 'Z': /* for definition continuations */ - case 'P': /* for prototypes */ - continue; - - case ':': - /* It is a C++ nested symbol. We don't need to record it - (I don't think); if we try to look up foo::bar::baz, - then symbols for the symtab containing foo should get - read in, I think. */ - /* Someone says sun cc puts out symbols like - /foo/baz/maclib::/usr/local/bin/maclib, - which would get here with a symbol type of ':'. */ - continue; - - default: - /* Unexpected symbol descriptor. The second and subsequent stabs - of a continued stab can show up here. The question is - whether they ever can mimic a normal stab--it would be - nice if not, since we certainly don't want to spend the - time searching to the end of every string looking for - a backslash. */ - - complain (&unknown_symchar_complaint, p[1]); - - /* Ignore it; perhaps it is an extension that we don't - know about. */ - continue; - } - } - } - } - - if (pst) - { - xcoff_end_psymtab (pst, psymtab_include_list, includes_used, - ssymnum, dependency_list, - dependencies_used, textlow_not_set); - } - - /* Record the toc offset value of this symbol table into objfile structure. - If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain - this information would be file auxiliary header. */ - - ((struct coff_symfile_info *) objfile->sym_private)->toc_offset = toc_offset; -} - -/* Return the toc offset value for a given objfile. */ - -CORE_ADDR -get_toc_offset (struct objfile *objfile) -{ - if (objfile) - return ((struct coff_symfile_info *) objfile->sym_private)->toc_offset; - return 0; -} - -/* 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. - - 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). */ - -static void -xcoff_initial_scan (struct objfile *objfile, int mainline) -{ - bfd *abfd; - int val; - struct cleanup *back_to; - int num_symbols; /* # of symbols */ - file_ptr symtab_offset; /* symbol table and */ - file_ptr stringtab_offset; /* string table file offsets */ - struct coff_symfile_info *info; - char *name; - unsigned int size; - - info = (struct coff_symfile_info *) objfile->sym_private; - symfile_bfd = abfd = objfile->obfd; - name = objfile->name; - - num_symbols = bfd_get_symcount (abfd); /* # of symbols */ - symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ - stringtab_offset = symtab_offset + - num_symbols * coff_data (abfd)->local_symesz; - - info->min_lineno_offset = 0; - info->max_lineno_offset = 0; - bfd_map_over_sections (abfd, find_linenos, info); - - if (num_symbols > 0) - { - /* Read the string table. */ - init_stringtab (abfd, stringtab_offset, objfile); - - /* Read the .debug section, if present. */ - { - sec_ptr secp; - bfd_size_type length; - char *debugsec = NULL; - - secp = bfd_get_section_by_name (abfd, ".debug"); - if (secp) - { - length = bfd_section_size (abfd, secp); - if (length) - { - debugsec = - (char *) obstack_alloc (&objfile->symbol_obstack, length); - - if (!bfd_get_section_contents (abfd, secp, debugsec, - (file_ptr) 0, length)) - { - error ("Error reading .debug section of `%s': %s", - name, bfd_errmsg (bfd_get_error ())); - } - } - } - ((struct coff_symfile_info *) objfile->sym_private)->debugsec = - debugsec; - } - } - - /* Read the symbols. We keep them in core because we will want to - access them randomly in read_symbol*. */ - val = bfd_seek (abfd, symtab_offset, SEEK_SET); - if (val < 0) - error ("Error reading symbols from %s: %s", - name, bfd_errmsg (bfd_get_error ())); - size = coff_data (abfd)->local_symesz * num_symbols; - ((struct coff_symfile_info *) objfile->sym_private)->symtbl = - obstack_alloc (&objfile->symbol_obstack, size); - ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms = - num_symbols; - - val = bfd_bread (((struct coff_symfile_info *) objfile->sym_private)->symtbl, - size, abfd); - if (val != size) - perror_with_name ("reading symbol table"); - - /* 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)) - /* I'm not sure how how good num_symbols is; the rule of thumb in - init_psymbol_list was developed for a.out. On the one hand, - num_symbols includes auxents. On the other hand, it doesn't - include N_SLINE. */ - init_psymbol_list (objfile, num_symbols); - - free_pending_blocks (); - back_to = make_cleanup (really_free_pendings, 0); - - init_minimal_symbol_collection (); - make_cleanup_discard_minimal_symbols (); - - /* Now that the symbol table data of the executable file are all in core, - process them and define symbols accordingly. */ - - scan_xcoff_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); -} - -static void -xcoff_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) -{ - asection *sect = NULL; - int i; - - objfile->num_sections = SECT_OFF_MAX; - objfile->section_offsets = (struct section_offsets *) - obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); - - /* Initialize the section indexes for future use. */ - sect = bfd_get_section_by_name (objfile->obfd, ".text"); - if (sect) - objfile->sect_index_text = sect->index; - - sect = bfd_get_section_by_name (objfile->obfd, ".data"); - if (sect) - objfile->sect_index_data = sect->index; - - sect = bfd_get_section_by_name (objfile->obfd, ".bss"); - if (sect) - objfile->sect_index_bss = sect->index; - - sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); - if (sect) - objfile->sect_index_rodata = sect->index; - - for (i = 0; i < objfile->num_sections; ++i) - { - /* syms_from_objfile kindly subtracts from addr the - bfd_section_vma of the .text section. This strikes me as - wrong--whether the offset to be applied to symbol reading is - relative to the start address of the section depends on the - symbol format. In any event, this whole "addr" concept is - pretty broken (it doesn't handle any section but .text - sensibly), so just ignore the addr parameter and use 0. - rs6000-nat.c will set the correct section offsets via - objfile_relocate. */ - (objfile->section_offsets)->offsets[i] = 0; - } -} - -/* Register our ability to parse symbols for xcoff BFD files. */ - -static struct sym_fns xcoff_sym_fns = -{ - - /* It is possible that coff and xcoff should be merged as - they do have fundamental similarities (for example, the extra storage - classes used for stabs could presumably be recognized in any COFF file). - However, in addition to obvious things like all the csect hair, there are - some subtler differences between xcoffread.c and coffread.c, notably - the fact that coffread.c has no need to read in all the symbols, but - xcoffread.c reads all the symbols and does in fact randomly access them - (in C_BSTAT and line number processing). */ - - bfd_target_xcoff_flavour, - - xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ - xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ - xcoff_initial_scan, /* sym_read: read a symbol file into symtab */ - xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ - xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ - NULL /* next: pointer to next struct sym_fns */ -}; - -void -_initialize_xcoffread (void) -{ - add_symtab_fns (&xcoff_sym_fns); - - func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0, - "<function, no debug info>", NULL); - TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int; - var_symbol_type = - init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0, - "<variable, no debug info>", NULL); -} |