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- /* Read AIXcoff symbol tables and convert to internal format, for GDB.
- Copyright (C) 1986-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "bfd.h"
-
- #ifdef IBM6000_HOST
- /* Native only: Need struct tbtable in <sys/debug.h>. */
-
- /* AIX COFF names have a preceeding dot `.' */
- #define NAMES_HAVE_DOT 1
-
- #include <sys/types.h>
- #include <fcntl.h>
- #include <ctype.h>
-
- #include "obstack.h"
- #include <sys/param.h>
- #ifndef NO_SYS_FILE
- #include <sys/file.h>
- #endif
- #include <sys/stat.h>
- #include <sys/debug.h>
-
- #include "symtab.h"
- #include "gdbtypes.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "buildsym.h"
-
- #include "coff/internal.h" /* FIXME, internal data from BFD */
- #include "libcoff.h" /* FIXME, internal data from BFD */
- #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
-
-
- /* Define this if you want gdb use the old xcoff symbol processing. This
- way it won't use common `define_symbol()' function and Sun dbx stab
- string grammar. And likely it won't be able to do G++ debugging. */
-
- /* #define NO_DEFINE_SYMBOL 1 */
-
- /* Define this if you want gdb to ignore typdef stabs. This was needed for
- one of Transarc, to reduce the size of the symbol table. Types won't be
- recognized, but tag names will be. */
-
- /* #define NO_TYPES 1 */
-
- /* Simplified internal version of coff symbol table information */
-
- struct coff_symbol {
- char *c_name;
- int c_symnum; /* symbol number of this entry */
- int c_nsyms; /* 0 if syment only, 1 if syment + auxent */
- long c_value;
- int c_sclass;
- int c_secnum;
- unsigned int c_type;
- };
-
- /* The COFF line table, in raw form. */
- static char *linetab = NULL; /* Its actual contents */
- static long linetab_offset; /* Its offset in the file */
- static unsigned long linetab_size; /* Its size */
-
- /* 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;
-
- /* pointer to the string table */
- static char *strtbl;
-
- /* length of the string table */
- static int strtbl_len;
-
- /* pointer to debug section */
- static char *debugsec;
-
- /* pointer to the a.out symbol table */
- static char *symtbl;
-
- /* initial symbol-table-debug-string vector length */
-
- #define INITIAL_STABVECTOR_LENGTH 40
-
- struct pending_stabs *global_stabs;
-
-
- /* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
-
- int within_function;
-
- /* Local variables that hold the shift and mask values for the
- COFF file that we are currently reading. These come back to us
- from BFD, and are referenced by their macro names, as well as
- internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
- macros from ../internalcoff.h . */
-
- static unsigned local_n_btshft;
- static unsigned local_n_tmask;
-
- #undef N_BTSHFT
- #define N_BTSHFT local_n_btshft
- #undef N_TMASK
- #define N_TMASK local_n_tmask
-
- /* Local variables that hold the sizes in the file of various COFF structures.
- (We only need to know this to read them from the file -- BFD will then
- translate the data in them, into `internal_xxx' structs in the right
- byte order, alignment, etc.) */
-
- static unsigned local_symesz;
-
-
- /* coff_symfile_init()
- is the coff-specific initialization routine for reading symbols.
- It is passed a struct sym_fns which contains, among other things,
- the BFD for the file whose symbols are being read, and a slot for
- a pointer to "private data" which we fill with cookies and other
- treats for coff_symfile_read().
-
- We will only be called if this is a COFF or COFF-like file.
- BFD handles figuring out the format of the file, and code in symtab.c
- uses BFD's determination to vector to us.
-
- The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
-
- 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 */
- };
-
-
- static void
- enter_line_range PARAMS ((struct subfile *, unsigned, unsigned,
- CORE_ADDR, CORE_ADDR, unsigned *));
-
- static void
- free_debugsection PARAMS ((void));
-
- static int
- init_debugsection PARAMS ((bfd *));
-
- static int
- init_stringtab PARAMS ((bfd *, long, struct objfile *));
-
- static void
- aixcoff_symfile_init PARAMS ((struct objfile *));
-
- static void
- aixcoff_new_init PARAMS ((struct objfile *));
-
- static void
- aixcoff_symfile_read PARAMS ((struct sym_fns *, CORE_ADDR, int));
-
- static void
- aixcoff_symfile_finish PARAMS ((struct objfile *));
-
- static int
- init_lineno PARAMS ((bfd *, long, int));
-
- static void
- find_linenos PARAMS ((bfd *, sec_ptr, PTR));
-
- static int
- read_symbol_lineno PARAMS ((char *, int));
-
- static int
- read_symbol_nvalue PARAMS ((char *, int));
-
- static struct symbol *
- process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *));
-
- static void
- read_xcoff_symtab PARAMS ((struct objfile *, int));
-
- static void
- add_stab_to_list PARAMS ((char *, struct pending_stabs **));
-
- static void
- sort_syms PARAMS ((void));
-
- static int
- compare_symbols PARAMS ((const void *, const void *));
-
- /* Call sort_syms to sort alphabetically
- the symbols of each block of each symtab. */
-
- static int
- compare_symbols (s1p, s2p)
- const PTR s1p;
- const PTR s2p;
- {
- /* Names that are less should come first. */
- register struct symbol **s1 = (struct symbol **) s1p;
- register struct symbol **s2 = (struct symbol **) s2p;
- register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0)
- return namediff;
-
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
- }
-
-
- /* Sort a vector of symbols by their value. */
-
- static void
- sort_syms ()
- {
- register struct symtab *s;
- register struct objfile *objfile;
- register int i, nbl;
- register struct blockvector *bv;
- register struct block *b;
-
- for (objfile = object_files; objfile != NULL; objfile = objfile -> next)
- {
- for (s = objfile -> symtabs; s != NULL; s = s -> next)
- {
- bv = BLOCKVECTOR (s);
- nbl = BLOCKVECTOR_NBLOCKS (bv);
- for (i = 0; i < nbl; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- if (BLOCK_SHOULD_SORT (b))
- {
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
- }
- }
- }
- }
- }
-
-
- /* add a given stab string into given stab vector. */
-
- static void
- add_stab_to_list (stabname, stabvector)
- 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;
- }
-
-
- #if 0
- /* for all the stabs in a given stab vector, build appropriate types
- and fix their symbols in given symbol vector. */
-
- void
- patch_block_stabs (symbols, stabs)
- struct pending *symbols;
- struct pending_stabs *stabs;
- {
- int ii;
-
- if (!stabs)
- return;
-
- /* for all the stab entries, find their corresponding symbols and
- patch their types! */
-
- for (ii=0; ii < stabs->count; ++ii) {
- char *name = stabs->stab[ii];
- char *pp = (char*) index (name, ':');
- struct symbol *sym = find_symbol_in_list (symbols, name, pp-name);
- if (!sym) {
- ;
- /* printf ("ERROR! stab symbol not found!\n"); */ /* FIXME */
- /* The above is a false alarm. There are cases the we can have
- a stab, without its symbol. xlc generates this for the extern
- definitions in inner blocks. */
- }
- else {
- pp += 2;
-
- if (*(pp-1) == 'F' || *(pp-1) == 'f')
- SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp));
- else
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- }
- }
- }
- #endif
-
-
- /* compare line table entry addresses. */
-
- static int
- compare_lte (lte1, lte2)
- struct linetable_entry *lte1, *lte2;
- {
- return lte1->pc - lte2->pc;
- }
-
- /* Give a line table with function entries are marked, arrange its functions
- in assending 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. */
-
- static struct linetable *
- arrange_linetable (oldLineTb)
- struct linetable *oldLineTb; /* old linetable */
- {
- 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*)
- malloc (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*)
- realloc (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) {
- free (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*) malloc (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];
- }
- free (fentry);
- newLineTb->nitems = oldLineTb->nitems - function_count;
- return newLineTb;
- }
-
-
-
- /* We try to detect the beginning of a compilation unit. That info will
- be used as an entry in line number recording routines (enter_line_range) */
-
- static unsigned first_fun_line_offset;
- static unsigned first_fun_bf;
-
- #define mark_first_line(OFFSET, SYMNUM) \
- if (!first_fun_line_offset) { \
- first_fun_line_offset = OFFSET; \
- first_fun_bf = SYMNUM; \
- }
-
-
- /* 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 */
- int begin, end; /* offsets to the line table */
- 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
- record_include_begin (cs)
- struct coff_symbol *cs;
- {
- /* In aixcoff, we assume include files cannot be nested (not in .c files
- of course, but in corresponding .s files.) */
-
- if (inclDepth)
- fatal ("aix internal: pending include file exists.");
-
- ++inclDepth;
-
- /* allocate an include file, or make room for the new entry */
- if (inclLength == 0) {
- inclTable = (InclTable*)
- xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
- bzero (inclTable, 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);
- bzero (inclTable+inclLength-INITIAL_INCLUDE_TABLE_LENGTH,
- sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH);
- }
-
- inclTable [inclIndx].name = cs->c_name;
- inclTable [inclIndx].begin = cs->c_value;
- }
-
-
- static void
- record_include_end (cs)
- struct coff_symbol *cs;
- {
- InclTable *pTbl;
-
- if (inclDepth == 0)
- fatal ("aix internal: Mismatch C_BINCL/C_EINCL pair found.");
-
- pTbl = &inclTable [inclIndx];
- pTbl->end = cs->c_value;
-
- --inclDepth;
- ++inclIndx;
- }
-
-
- /* 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 (start, end)
- CORE_ADDR start, end;
- {
- char *pp;
- int offset, ii;
-
- struct subfile main_subfile; /* subfile structure for the main
- compilation unit. */
-
- /* 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(). */
-
- int main_source_baseline = 0;
-
-
- unsigned *firstLine;
- CORE_ADDR addr;
-
- if (!(offset = first_fun_line_offset))
- goto return_after_cleanup;
-
- bzero (&main_subfile, sizeof (main_subfile));
- first_fun_line_offset = 0;
-
- 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 */
- else {
-
- 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));
-
- bzero (tmpSubfile, 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);
-
- 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 < (linetab_offset + linetab_size + 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 {
- free (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. */
-
- /* start_subfile (inclTable[ii].name, (char*)0); */
- start_subfile (" ?", (char*)0);
- current_subfile->name =
- obsavestring (inclTable[ii].name, strlen (inclTable[ii].name),
- ¤t_objfile->symbol_obstack);
-
- if (lv == lineTb) {
- current_subfile->line_vector = (struct linetable *)
- xrealloc (lv, (sizeof (struct linetable)
- + lv->nitems * sizeof (struct linetable_entry)));
-
- }
- else {
- free (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. */
- bzero (&main_subfile, sizeof (struct subfile));
- }
-
- void
- aix_process_linenos ()
- {
- /* 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) */
-
- static void
- enter_line_range (subfile, beginoffset, endoffset, startaddr, endaddr, firstLine)
- struct subfile *subfile;
- unsigned beginoffset, endoffset; /* offsets to line table */
- CORE_ADDR startaddr, endaddr;
- unsigned *firstLine;
- {
- char *pp, *limit;
- CORE_ADDR addr;
-
- /* Do Byte swapping, if needed. FIXME! */
- #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
- #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
- #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
-
- pp = &linetab [beginoffset - linetab_offset];
- limit = endoffset ? &linetab [endoffset - linetab_offset]
- : &linetab [linetab_size -1];
-
- while (pp <= limit) {
-
- /* find the address this line represents */
- addr = P_LINENO(pp) ?
- P_LINEADDR(pp) : read_symbol_nvalue (symtbl, P_LINESYM(pp));
-
- if (addr < startaddr || (endaddr && addr > endaddr))
- return;
-
- if (P_LINENO(pp) == 0) {
- *firstLine = read_symbol_lineno (symtbl, P_LINESYM(pp));
- record_line (subfile, 0, addr);
- --(*firstLine);
- }
- else
- record_line (subfile, *firstLine + P_LINENO(pp), addr);
-
- pp += LINESZ;
- }
- }
-
- typedef struct {
- int fsize; /* file size */
- int fixedparms; /* number of fixed parms */
- int floatparms; /* number of float parms */
- unsigned int parminfo; /* parameter info.
- See /usr/include/sys/debug.h
- tbtable_ext.parminfo */
- int framesize; /* function frame size */
- } TracebackInfo;
-
-
- /* Given a function symbol, return its traceback information. */
-
- TracebackInfo *
- retrieve_tracebackinfo (abfd, textsec, cs)
- bfd *abfd;
- sec_ptr textsec;
- struct coff_symbol *cs;
- {
- #define TBTABLE_BUFSIZ 2000
- #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
- traceback table. */
-
- static TracebackInfo tbInfo;
- struct tbtable *ptb;
-
- static char buffer [TBTABLE_BUFSIZ];
-
- int *pinsn;
- int bytesread=0; /* total # of bytes read so far */
- int bufferbytes; /* number of bytes in the buffer */
-
- int functionstart = cs->c_value - textsec->vma;
-
- bzero (&tbInfo, sizeof (tbInfo));
-
- /* keep reading blocks of data from the text section, until finding a zero
- word and a traceback table. */
-
- while (
- bufferbytes = (
- (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread)) ?
- TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread))
-
- && bfd_get_section_contents (abfd, textsec, buffer,
- (file_ptr)(functionstart + bytesread), bufferbytes))
- {
- bytesread += bufferbytes;
- pinsn = (int*) buffer;
-
- /* if this is the first time we filled the buffer, retrieve function
- framesize info. */
-
- if (bytesread == bufferbytes) {
-
- /* skip over unrelated instructions */
-
- if (*pinsn == 0x7c0802a6) /* mflr r0 */
- ++pinsn;
- if ((*pinsn & 0xfc00003e) == 0x7c000026) /* mfcr Rx */
- ++pinsn;
- if ((*pinsn & 0xfc000000) == 0x48000000) /* bl foo, save fprs */
- ++pinsn;
- if ((*pinsn & 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
- ++pinsn;
-
- do {
- int tmp = (*pinsn >> 16) & 0xffff;
-
- if (tmp == 0x9421) { /* stu r1, NUM(r1) */
- tbInfo.framesize = 0x10000 - (*pinsn & 0xffff);
- break;
- }
- else if ((*pinsn == 0x93e1fffc) || /* st r31,-4(r1) */
- (tmp == 0x9001)) /* st r0, NUM(r1) */
- ;
- /* else, could not find a frame size. */
- else
- return NULL;
-
- } while (++pinsn && *pinsn);
-
- if (!tbInfo.framesize)
- return NULL;
- }
-
- /* look for a zero word. */
-
- while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int))))
- ++pinsn;
-
- if (pinsn >= (int*)(buffer + bufferbytes))
- continue;
-
- if (*pinsn == 0) {
-
- /* function size is the amount of bytes we have skipped so far. */
- tbInfo.fsize = bytesread - (buffer + bufferbytes - (char*)pinsn);
-
- ++pinsn;
-
- /* if we don't have the whole traceback table in the buffer, re-read
- the whole thing. */
-
- if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) {
-
- /* In case if we are *very* close to the end of the text section
- and cannot read properly from that point on, abort by returning
- NULL.
- Handle this case more graciously -- FIXME */
-
- if (!bfd_get_section_contents (
- abfd, textsec, buffer,
- (file_ptr)(functionstart +
- bytesread - (buffer + bufferbytes - (char*)pinsn)),MIN_TBTABSIZ))
- { printf ("Abnormal return!..\n"); return NULL; }
-
- ptb = (struct tbtable *)buffer;
- }
- else
- ptb = (struct tbtable *)pinsn;
-
- tbInfo.fixedparms = ptb->tb.fixedparms;
- tbInfo.floatparms = ptb->tb.floatparms;
- tbInfo.parminfo = ptb->tb_ext.parminfo;
- return &tbInfo;
- }
- }
- return NULL;
- }
-
- #if 0
- /* Given a function symbol, return a pointer to its traceback table. */
-
- struct tbtable *
- retrieve_traceback (abfd, textsec, cs, size)
- bfd *abfd;
- sec_ptr textsec;
- struct coff_symbol *cs;
- int *size; /* return function size */
- {
- #define TBTABLE_BUFSIZ 2000
- #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
- traceback table. */
-
- static char buffer [TBTABLE_BUFSIZ];
-
- int *pinsn;
- int bytesread=0; /* total # of bytes read so far */
- int bufferbytes; /* number of bytes in the buffer */
-
- int functionstart = cs->c_value - textsec->filepos + textsec->vma;
- *size = 0;
-
- /* keep reading blocks of data from the text section, until finding a zero
- word and a traceback table. */
-
- while (bfd_get_section_contents (abfd, textsec, buffer,
- (file_ptr)(functionstart + bytesread),
- bufferbytes = (
- (TBTABLE_BUFSIZ < (textsec->size - functionstart - bytesread)) ?
- TBTABLE_BUFSIZ : (textsec->size - functionstart - bytesread))))
- {
- bytesread += bufferbytes;
- pinsn = (int*) buffer;
-
- /* look for a zero word. */
-
- while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int))))
- ++pinsn;
-
- if (pinsn >= (int*)(buffer + bufferbytes))
- continue;
-
- if (*pinsn == 0) {
-
- /* function size is the amount of bytes we have skipped so far. */
- *size = bytesread - (buffer + bufferbytes - pinsn);
-
- ++pinsn;
-
- /* if we don't have the whole traceback table in the buffer, re-read
- the whole thing. */
-
- if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) {
-
- /* In case if we are *very* close to the end of the text section
- and cannot read properly from that point on, abort for now.
- Handle this case more graciously -- FIXME */
-
- if (!bfd_get_section_contents (
- abfd, textsec, buffer,
- (file_ptr)(functionstart +
- bytesread - (buffer + bufferbytes - pinsn)),MIN_TBTABSIZ))
- /* abort (); */ { printf ("abort!!!\n"); return NULL; }
-
- return (struct tbtable *)buffer;
- }
- else
- return (struct tbtable *)pinsn;
- }
- }
- return NULL;
- }
- #endif /* 0 */
-
-
-
-
- /* 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, ALLOCED) \
- { \
- char *namestr; \
- if (ALLOCED) \
- namestr = (NAME) + 1; \
- else { \
- (NAME) = namestr = \
- obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
- (ALLOCED) = 1; \
- } \
- prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \
- misc_func_recorded = 1; \
- }
-
-
- /* A parameter template, used by ADD_PARM_TO_PENDING. */
-
- static struct symbol parmsym = { /* default parameter symbol */
- "", /* name */
- VAR_NAMESPACE, /* namespace */
- LOC_ARG, /* class */
- NULL, /* type */
- 0, /* line number */
- 0, /* value */
- };
-
- /* Add a parameter to a given pending symbol list. */
-
- #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
- { \
- PARM = (struct symbol *) \
- obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
- *(PARM) = parmsym; \
- SYMBOL_TYPE (PARM) = PTYPE; \
- SYMBOL_VALUE (PARM) = VALUE; \
- add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
- }
-
-
- /* aixcoff 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;
-
- /* true if space for symbol name has been allocated. */
-
- static int symname_alloced = 0;
-
- /* read the whole symbol table of a given bfd. */
-
- static void
- read_xcoff_symtab (objfile, nsyms)
- struct objfile *objfile; /* Object file we're reading from */
- int nsyms; /* # of symbols */
- {
- bfd *abfd = objfile->obfd;
- char *raw_symbol; /* Pointer into raw seething symbol table */
- char *raw_auxptr; /* Pointer to first raw aux entry for sym */
- sec_ptr textsec; /* Pointer to text section */
- TracebackInfo *ptb; /* Pointer to traceback table */
-
- struct internal_syment symbol[1];
- union internal_auxent main_aux[1];
- struct coff_symbol cs[1];
- CORE_ADDR file_start_addr = 0;
- CORE_ADDR file_end_addr = 0;
-
- int next_file_symnum = -1;
- int just_started = 1;
- int depth = 0;
- int toc_offset = 0; /* toc offset value in data section. */
- int val;
- int fcn_last_line;
- int fcn_start_addr;
- long fcn_line_offset;
- size_t size;
-
- struct coff_symbol fcn_stab_saved;
-
- /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
- union internal_auxent fcn_aux_saved;
- struct type *fcn_type_saved = NULL;
- 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 misc_func_recorded; /* true if any misc. function */
-
- current_objfile = objfile;
-
- /* Get the appropriate COFF "constants" related to the file we're handling. */
- N_TMASK = coff_data (abfd)->local_n_tmask;
- N_BTSHFT = coff_data (abfd)->local_n_btshft;
- local_symesz = coff_data (abfd)->local_symesz;
-
- last_source_file = 0;
- last_csect_name = 0;
- last_csect_val = 0;
- misc_func_recorded = 0;
-
- start_symtab (filestring, (char *)NULL, file_start_addr);
- symnum = 0;
- first_object_file_end = 0;
-
- /* Allocate space for the entire symbol table at once, and read it
- all in. The bfd is already positioned at the beginning of
- the symbol table. */
-
- size = coff_data (abfd)->local_symesz * nsyms;
- symtbl = xmalloc (size);
-
- val = bfd_read (symtbl, size, 1, abfd);
- if (val != size)
- perror_with_name ("reading symbol table");
-
- raw_symbol = symtbl;
-
- textsec = bfd_get_section_by_name (abfd, ".text");
- if (!textsec) {
- printf ("Unable to locate text section!\n");
- }
-
- while (symnum < nsyms) {
-
- 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 aixcoff 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_nsyms = 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;
- } 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 & 0xff;
- cs->c_secnum = symbol->n_scnum;
- cs->c_type = (unsigned)symbol->n_type;
-
- raw_symbol += coff_data (abfd)->local_symesz;
- ++symnum;
-
- raw_auxptr = raw_symbol; /* Save addr of first aux entry */
-
- /* 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)
- end_symtab (cur_src_end_addr, 1, 0, objfile);
-
- start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0);
- cur_src_end_addr = first_object_file_end;
- /* done with all files, everything from here on is globals */
- }
-
- /* if explicitly specified as a function, treat is as one. */
- if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF) {
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- main_aux);
- goto function_entry_point;
- }
-
- if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_nsyms == 1)
- {
- /* dealing with a symbol with a csect entry. */
-
- # define CSECT(PP) ((PP)->x_csect)
- # define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
- # 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,
- main_aux);
-
- switch (CSECT_SMTYP (main_aux)) {
-
- case XTY_ER :
- continue; /* ignore all external references. */
-
- case XTY_SD : /* a section description. */
- {
- switch (CSECT_SCLAS (main_aux)) {
-
- case XMC_PR : /* a `.text' csect. */
- {
-
- /* A program csect is seen.
-
- We have to allocate one symbol table for each program csect. Normally
- gdb prefers one symtab for each compilation unit (CU). In case of AIX, one
- CU might include more than one prog csect, and they don't have to be
- adjacent in terms of the space they occupy in memory. Thus, one single
- CU might get fragmented in the memory and gdb's file start and end address
- approach does not work! */
-
- 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) {
- int alloced = 0;
- RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val,
- mst_text, alloced);
- }
-
-
- complete_symtab (filestring, file_start_addr);
- cur_src_end_addr = file_end_addr;
- end_symtab (file_end_addr, 1, 0, objfile);
- start_symtab ((char *)NULL, (char *)NULL, (CORE_ADDR)0);
- }
-
- /* 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;
- file_end_addr = cs->c_value + CSECT_LEN (main_aux);
-
- if (cs->c_name && cs->c_name[0] == '.') {
- last_csect_name = cs->c_name;
- last_csect_val = cs->c_value;
- }
- }
- misc_func_recorded = 0;
- continue;
-
- case XMC_RW :
- break;
-
- /* If the section is not a data description, ignore it. Note that
- uninitialized data will show up as XTY_CM/XMC_RW pair. */
-
- case XMC_TC0:
- if (toc_offset)
- warning ("More than one xmc_tc0 symbol found.");
- toc_offset = cs->c_value;
- continue;
-
- case XMC_TC : /* ignore toc entries */
- default : /* any other XMC_XXX */
- continue;
- }
- }
- break; /* switch CSECT_SCLAS() */
-
- case XTY_LD :
-
- /* a function entry point. */
- if (CSECT_SCLAS (main_aux) == XMC_PR) {
-
- function_entry_point:
- RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text,
- symname_alloced);
-
- fcn_line_offset = main_aux->x_sym.x_fcnary.x_fcn.x_lnnoptr;
- 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;
-
-
- ptb = NULL;
-
- /* If function has two auxent, then debugging information is
- already available for it. Process traceback table for
- functions with only one auxent. */
-
- if (cs->c_nsyms == 1)
- ptb = retrieve_tracebackinfo (abfd, textsec, cs);
-
- else if (cs->c_nsyms != 2)
- abort ();
-
- /* If there is traceback info, create and add parameters for it. */
-
- if (ptb && (ptb->fixedparms || ptb->floatparms)) {
-
- int parmcnt = ptb->fixedparms + ptb->floatparms;
- char *parmcode = (char*) &ptb->parminfo;
- int parmvalue = ptb->framesize + 0x18; /* sizeof(LINK AREA) == 0x18 */
- unsigned int ii, mask;
-
- for (ii=0, mask = 0x80000000; ii <parmcnt; ++ii) {
- struct symbol *parm;
-
- if (ptb->parminfo & mask) { /* float or double */
- mask = mask >> 1;
- if (ptb->parminfo & mask) { /* double parm */
- ADD_PARM_TO_PENDING
- (parm, parmvalue, builtin_type_double, local_symbols);
- parmvalue += sizeof (double);
- }
- else { /* float parm */
- ADD_PARM_TO_PENDING
- (parm, parmvalue, builtin_type_float, local_symbols);
- parmvalue += sizeof (float);
- }
- }
- else { /* fixed parm, use (int*) for hex rep. */
- ADD_PARM_TO_PENDING (parm, parmvalue,
- lookup_pointer_type (builtin_type_int),
- local_symbols);
- parmvalue += sizeof (int);
- }
- mask = mask >> 1;
- }
-
- /* Fake this as a function. Needed in process_xcoff_symbol() */
- cs->c_type = 32;
-
- finish_block(process_xcoff_symbol (cs, objfile), &local_symbols,
- pending_blocks, cs->c_value,
- cs->c_value + ptb->fsize, objfile);
- }
- continue;
- }
- /* shared library function trampoline code entry point. */
- else if (CSECT_SCLAS (main_aux) == XMC_GL) {
-
- /* record trampoline code entries as mst_unknown symbol. When we
- lookup mst symbols, we will choose mst_text over mst_unknown. */
-
- #if 1
- /* After the implementation of incremental loading of shared
- libraries, we don't want to access trampoline entries. This
- approach has a consequence of the necessity to bring the whole
- shared library at first, in order do anything with it (putting
- breakpoints, using malloc, etc). On the other side, this is
- consistient with gdb's behaviour on a SUN platform. */
-
- /* Trying to prefer *real* function entry over its trampoline,
- by assigning `mst_unknown' type to trampoline entries fails.
- Gdb treats those entries as chars. FIXME. */
-
- /* Recording this entry is necessary. Single stepping relies on
- this vector to get an idea about function address boundaries. */
-
- prim_record_minimal_symbol (0, cs->c_value, mst_unknown);
- #else
-
- /* record trampoline code entries as mst_unknown symbol. When we
- lookup mst symbols, we will choose mst_text over mst_unknown. */
-
- RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_unknown,
- symname_alloced);
- #endif
- continue;
- }
- break;
-
- default : /* all other XTY_XXXs */
- break;
- } /* switch CSECT_SMTYP() */ }
-
- switch (cs->c_sclass) {
-
- case C_FILE:
-
- /* 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. */
-
- int alloced = 0;
- RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val,
- mst_text, alloced);
- }
-
- /* 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_symtab' and `start_symtab' 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, 1, 0, objfile);
- start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0);
- 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;
-
- filestring = cs->c_name;
- break;
-
-
- case C_FUN:
-
- #ifdef NO_DEFINE_SYMBOL
- /* For a function stab, just save its type in `fcn_type_saved', and leave
- it for the `.bf' processing. */
- {
- char *pp = (char*) index (cs->c_name, ':');
-
- if (!pp || ( *(pp+1) != 'F' && *(pp+1) != 'f'))
- fatal ("Unrecognized stab");
- pp += 2;
-
- if (fcn_type_saved)
- fatal ("Unprocessed function type");
-
- fcn_type_saved = lookup_function_type (read_type (&pp, objfile));
- }
- #else
- fcn_stab_saved = *cs;
- #endif
- break;
-
-
- case C_FCN:
- if (strcmp (cs->c_name, ".bf") == 0) {
-
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- main_aux);
-
- within_function = 1;
-
- /* Linenos are now processed on a file-by-file, not fn-by-fn, basis.
- Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */
-
- /* 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_linenos() 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.
- */
- mark_first_line (fcn_line_offset, cs->c_symnum);
-
- new = push_context (0, fcn_start_addr);
-
- #ifdef NO_DEFINE_SYMBOL
- new->name = process_xcoff_symbol (&fcn_cs_saved, objfile);
-
- /* Between a function symbol and `.bf', there always will be a function
- stab. We save function type when processing that stab. */
-
- if (fcn_type_saved == NULL) {
- printf ("Unknown function type: symbol 0x%x\n", cs->c_symnum);
- SYMBOL_TYPE (new->name) = lookup_function_type (builtin_type_int);
- }
- else {
- SYMBOL_TYPE (new->name) = fcn_type_saved;
- fcn_type_saved = NULL;
- }
- #else
- new->name = define_symbol
- (fcn_cs_saved.c_value, fcn_stab_saved.c_name, 0, 0, objfile);
- #endif
- }
- else if (strcmp (cs->c_name, ".ef") == 0) {
-
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- 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 '}' */
-
- fcn_last_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno;
- new = pop_context ();
- if (context_stack_depth != 0)
- error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
- symnum);
-
- finish_block (new->name, &local_symbols, new->old_blocks,
- new->start_addr,
- fcn_cs_saved.c_value +
- fcn_aux_saved.x_sym.x_misc.x_fsize, objfile);
- within_function = 0;
- }
- break;
-
- case C_BSTAT : /* begin static block */
- static_block_base = read_symbol_nvalue (symtbl, cs->c_value);
- break;
-
- case C_ESTAT : /* end of static block */
- static_block_base = 0;
- break;
-
- case C_ARG : /* These are not implemented. */
- case C_REGPARM :
- case C_TPDEF :
- case C_STRTAG :
- case C_UNTAG :
- case C_ENTAG :
- printf ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass);
- break;
-
- case C_HIDEXT : /* ignore these.. */
- case C_LABEL :
- case C_NULL :
- 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 (strcmp (cs->c_name, ".bb") == 0) {
- depth++;
- new = push_context (depth, cs->c_value);
- }
- else if (strcmp (cs->c_name, ".eb") == 0) {
- new = pop_context ();
- if (depth != new->depth)
- error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
- symnum);
-
- depth--;
- 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, objfile);
- }
- local_symbols = new->locals;
- }
- break;
-
- default :
- (void) process_xcoff_symbol (cs, objfile);
- break;
- }
-
- } /* while */
-
- if (last_source_file)
- end_symtab (cur_src_end_addr, 1, 0, objfile);
-
- free (symtbl);
- current_objfile = NULL;
-
- /* Record the toc offset value of this symbol table into ldinfo structure.
- If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
- this information would be file auxiliary header. */
-
- xcoff_add_toc_to_loadinfo (toc_offset);
- }
-
- #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) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
-
-
- /* process one xcoff symbol. */
-
- static struct symbol *
- process_xcoff_symbol (cs, objfile)
- register struct coff_symbol *cs;
- struct objfile *objfile;
- {
- struct symbol onesymbol;
- register struct symbol *sym = &onesymbol;
- struct symbol *sym2 = NULL;
- struct type *ttype;
- char *name, *pp, *qq;
- int struct_and_type_combined;
- int nameless;
-
- name = cs->c_name;
- if (name[0] == '.')
- ++name;
-
- bzero (sym, sizeof (struct symbol));
-
- /* default assumptions */
- SYMBOL_VALUE (sym) = cs->c_value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
-
- if (ISFCN (cs->c_type)) {
-
- /* At this point, we don't know the type of the function and assume it
- is int. This will be patched with the type from its stab entry later
- on in patch_block_stabs () */
-
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (objfile, FT_INTEGER));
-
- 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, default is `int'. */
- SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, FT_INTEGER);
-
- switch (cs->c_sclass)
- {
- #if 0
- 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;
- #endif
-
- case C_DECL: /* a type decleration?? */
-
- #if defined(NO_TYPEDEFS) || defined(NO_DEFINE_SYMBOL)
- qq = (char*) strchr (name, ':');
- if (!qq) /* skip if there is no ':' */
- return NULL;
-
- nameless = (qq == name);
-
- struct_and_type_combined = (qq[1] == 'T' && qq[2] == 't');
- pp = qq + (struct_and_type_combined ? 3 : 2);
-
-
- /* To handle GNU C++ typename abbreviation, we need to be able to fill
- in a type's name as soon as space for that type is allocated. */
-
- if (struct_and_type_combined && name != qq) {
-
- int typenums[2];
- struct type *tmp_type;
- char *tmp_pp = pp;
-
- read_type_number (&tmp_pp, typenums);
- tmp_type = dbx_alloc_type (typenums, objfile);
-
- if (tmp_type && !TYPE_NAME (tmp_type) && !nameless)
- TYPE_NAME (tmp_type) = SYMBOL_NAME (sym) =
- obsavestring (name, qq-name,
- &objfile->symbol_obstack);
- }
- ttype = SYMBOL_TYPE (sym) = read_type (&pp);
-
- /* if there is no name for this typedef, you don't have to keep its
- symbol, since nobody could ask for it. Otherwise, build a symbol
- and add it into symbol_list. */
-
- if (nameless)
- return;
-
- #ifdef NO_TYPEDEFS
- /* Transarc wants to eliminate type definitions from the symbol table.
- Limited debugging capabilities, but faster symbol table processing
- and less memory usage. Note that tag definitions (starting with
- 'T') will remain intact. */
-
- if (qq[1] != 'T' && (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0')) {
-
- if (SYMBOL_NAME (sym))
- TYPE_NAME (ttype) = SYMBOL_NAME (sym);
- else
- TYPE_NAME (ttype) = obsavestring (name, qq-name);
-
- return;
- }
-
- #endif /* !NO_TYPEDEFS */
-
- /* read_type() will return null if type (or tag) definition was
- unnnecessarily duplicated. Also, if the symbol doesn't have a name,
- there is no need to keep it in symbol table. */
- /* The above argument no longer valid. read_type() never returns NULL. */
-
- if (!ttype)
- return NULL;
-
- /* if there is no name for this typedef, you don't have to keep its
- symbol, since nobody could ask for it. Otherwise, build a symbol
- and add it into symbol_list. */
-
- if (qq[1] == 'T')
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- else if (qq[1] == 't')
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- else {
- warning ("Unrecognized stab string.\n");
- return NULL;
- }
-
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- if (!SYMBOL_NAME (sym))
- SYMBOL_NAME (sym) = obsavestring (name, qq-name);
-
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
-
- /* For a combination of struct and type, add one more symbol
- for the type. */
-
- if (struct_and_type_combined) {
- SYMBOL_DUP (sym, sym2);
- SYMBOL_NAMESPACE (sym2) = VAR_NAMESPACE;
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- }
-
- /* assign a name to the type node. */
-
- if (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0') {
- if (struct_and_type_combined)
- TYPE_NAME (ttype) = SYMBOL_NAME (sym);
- else if (qq[1] == 'T') /* struct namespace */
- TYPE_NAME (ttype) = concat (
- TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " :
- TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ",
- SYMBOL_NAME (sym), NULL);
- }
- break;
-
- #else /* !NO_DEFINE_SYMBOL */
- return define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
- #endif
-
- case C_GSYM:
- add_stab_to_list (name, &global_stabs);
- break;
-
- case C_PSYM:
- case C_RPSYM:
-
- #ifdef NO_DEFINE_SYMBOL
- if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
- SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM;
- pp += 2;
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
- #else
- sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
- SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM;
- return sym;
- #endif
-
- case C_STSYM:
-
- #ifdef NO_DEFINE_SYMBOL
- if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) += static_block_base;
- pp += 2;
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- break;
- #else
- /* If we are going to use Sun dbx's define_symbol(), we need to
- massage our stab string a little. Change 'V' type to 'S' to be
- comparible with Sun. */
-
- if (*name == ':' || (pp = (char *) index (name, ':')) == NULL)
- return NULL;
-
- ++pp;
- if (*pp == 'V') *pp = 'S';
- sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
- SYMBOL_VALUE (sym) += static_block_base;
- return sym;
- #endif
-
- case C_LSYM:
- if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- pp += 1;
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_AUTO:
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_EXT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &global_symbols);
- break;
-
- case C_STAT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- break;
-
- case C_REG:
- printf ("ERROR! C_REG is not fully implemented!\n");
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_RSYM:
-
- #ifdef NO_DEFINE_SYMBOL
- pp = (char*) strchr (name, ':');
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (cs->c_value);
- if (pp) {
- SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
- pp += 2;
- if (*pp)
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- }
- else
- /* else this is not a stab entry, suppose the type is either
- `int' or `float', depending on the register class. */
-
- SYMBOL_TYPE (sym) = (SYMBOL_VALUE (sym) < 32)
- ? lookup_fundamental_type (objfile, FT_INTEGER)
- : lookup_fundamental_type (objfile, FT_FLOAT);
-
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
- #else
- if (pp) {
- sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
- return sym;
- }
- else {
- warning ("A non-stab C_RSYM needs special handling.");
- return NULL;
- }
- #endif
-
- default :
- warning ("Unexpected storage class: %d.", cs->c_sclass);
- return NULL;
- }
- }
- return sym2;
- }
-
-
- static int
- read_symbol_nvalue (symtable, symno)
- char *symtable;
- int symno;
- {
- struct internal_syment symbol[1];
-
- bfd_coff_swap_sym_in (symfile_bfd, symtable + (symno*local_symesz), symbol);
- return symbol->n_value;
- }
-
-
- static int
- read_symbol_lineno (symtable, symno)
- char *symtable;
- int symno;
- {
- struct internal_syment symbol[1];
- union internal_auxent main_aux[1];
-
- int ii;
-
- for (ii = 0; ii < 50; ii++) {
- bfd_coff_swap_sym_in (symfile_bfd,
- symtable + (symno*local_symesz), symbol);
- if (symbol->n_sclass == C_FCN && 0 == strcmp (symbol->n_name, ".bf"))
- goto gotit;
- symno += symbol->n_numaux+1;
- }
-
- printf ("GDB Error: `.bf' not found.\n");
- return 0;
-
- gotit:
- /* take aux entry and return its lineno */
- symno++;
- bfd_coff_swap_aux_in (symfile_bfd, symtable+(symno*local_symesz),
- symbol->n_type, symbol->n_sclass, 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(abfd, asect, vpinfo)
- bfd *abfd;
- sec_ptr asect;
- PTR vpinfo;
- {
- struct coff_symfile_info *info;
- int size, count;
- file_ptr offset, maxoff;
-
- count = asect->lineno_count;
-
- if (strcmp (asect->name, ".text") || count == 0)
- return;
-
- size = count * coff_data (symfile_bfd)->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;
- }
-
-
- /* Read in all the line numbers for fast lookups later. Leave them in
- external (unswapped) format in memory; we'll swap them as we enter
- them into GDB's data structures. */
-
- static int
- init_lineno (abfd, offset, size)
- bfd *abfd;
- long offset;
- int size;
- {
- int val;
-
- if (bfd_seek(abfd, offset, 0) < 0)
- return -1;
-
- linetab = (char *) xmalloc(size);
-
- val = bfd_read(linetab, 1, size, abfd);
- if (val != size)
- return -1;
-
- linetab_offset = offset;
- linetab_size = size;
- make_cleanup (free, linetab); /* Be sure it gets de-allocated. */
- return 0;
- }
-
- /* dbx allows the text of a symbol name to be continued into the
- next symbol name! When such a continuation is encountered
- (a \ at the end of the text of a name)
- call this function to get the continuation. */
- /* So far, I haven't seen this happenning xlc output. I doubt we'll need this
- for aixcoff. */
-
- #undef next_symbol_text
- #define next_symbol_text() \
- printf ("Gdb Error: symbol names on multiple lines not implemented.\n")
-
-
- /* xlc/dbx combination uses a set of builtin types, starting from -1. return
- the proper type node fora given builtin type #. */
-
- struct type *
- builtin_type (pp)
- char **pp;
- {
- int typenums[2];
-
- if (**pp != '-') {
- printf ("ERROR!, unknown built-in type!\n");
- return NULL;
- }
- *pp += 1;
- read_type_number (pp, typenums);
-
- /* default types are defined in dbxstclass.h. */
- switch ( typenums[1] ) {
- case 1:
- return lookup_fundamental_type (current_objfile, FT_INTEGER);
- case 2:
- return lookup_fundamental_type (current_objfile, FT_CHAR);
- case 3:
- return lookup_fundamental_type (current_objfile, FT_SHORT);
- case 4:
- return lookup_fundamental_type (current_objfile, FT_LONG);
- case 5:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
- case 6:
- return lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR);
- case 7:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
- case 8:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
- case 9:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
- case 10:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
- case 11:
- return lookup_fundamental_type (current_objfile, FT_VOID);
- case 12:
- return lookup_fundamental_type (current_objfile, FT_FLOAT);
- case 13:
- return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
- case 14:
- return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
- case 15:
- /* requires a builtin `integer' */
- return lookup_fundamental_type (current_objfile, FT_INTEGER);
- case 16:
- return lookup_fundamental_type (current_objfile, FT_BOOLEAN);
- case 17:
- /* requires builtin `short real' */
- return lookup_fundamental_type (current_objfile, FT_FLOAT);
- case 18:
- /* requires builtin `real' */
- return lookup_fundamental_type (current_objfile, FT_FLOAT);
- default :
- printf ("ERROR! Unknown builtin type -%d\n", typenums[1]);
- return NULL;
- }
- }
-
- #if 0 /* Seems to be unused, don't bother converting from old misc function
- vector usage to new minimal symbol tables. FIXME: Delete this? */
-
- /* if we now nothing about a function but its address, make a function symbol
- out of it with the limited knowladge you have. This will be used when
- somebody refers to a function, which doesn't exist in the symbol table,
- but is in the minimal symbol table. */
-
- struct symbol *
- build_function_symbol (ind, objfile)
- int ind;
- struct objfile *objfile;
- {
- struct symbol *sym =
- (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
- SYMBOL_NAME (sym) = misc_function_vector[ind].name;
- /* SYMBOL_VALUE (sym) = misc_function_vector[ind].address; */
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (current_objfile, FT_INTEGER));
- SYMBOL_BLOCK_VALUE (sym) = (struct block *)
- obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
- BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) = misc_function_vector[ind].address;
- return sym;
- }
-
- #endif
-
- static void
- aixcoff_new_init (objfile)
- struct objfile *objfile;
- {
- }
-
- static void
- aixcoff_symfile_init (objfile)
- struct objfile *objfile;
- {
- bfd *abfd = objfile->obfd;
-
- /* Allocate struct to keep track of the symfile */
- objfile -> sym_private = xmmalloc (objfile -> md,
- sizeof (struct coff_symfile_info));
- 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
- aixcoff_symfile_finish (objfile)
- struct objfile *objfile;
- {
- if (objfile -> sym_private != NULL)
- {
- mfree (objfile -> md, objfile -> sym_private);
- }
-
- /* Start with a fresh include table for the next objfile. */
-
- if (inclTable)
- {
- free (inclTable);
- inclTable = NULL;
- }
- inclIndx = inclLength = inclDepth = 0;
- }
-
-
- static int
- init_stringtab(abfd, offset, objfile)
- bfd *abfd;
- long offset;
- struct objfile *objfile;
- {
- long length;
- int val;
- unsigned char lengthbuf[4];
-
- if (bfd_seek(abfd, offset, 0) < 0)
- return -1;
-
- val = bfd_read((char *)lengthbuf, 1, 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 length || length < sizeof length)
- return 0;
-
- /* 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);
- if (strtbl == NULL)
- return -1;
-
- bcopy(&length, strtbl, sizeof length);
- if (length == sizeof length)
- return 0;
-
- val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd);
-
- if (val != length - sizeof length || strtbl[length - 1] != '\0')
- return -1;
-
- return 0;
- }
-
- static int
- init_debugsection(abfd)
- bfd *abfd;
- {
- register sec_ptr secp;
- bfd_size_type length;
-
- if (debugsec) {
- free(debugsec);
- debugsec = NULL;
- }
-
- secp = bfd_get_section_by_name(abfd, ".debug");
- if (!secp)
- return 0;
-
- if (!(length = bfd_section_size(abfd, secp)))
- return 0;
-
- debugsec = (char *) xmalloc ((unsigned)length);
- if (debugsec == NULL)
- return -1;
-
- if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) {
- printf ("Can't read .debug section from symbol file\n");
- return -1;
- }
- return 0;
- }
-
- static void
- free_debugsection()
- {
- if (debugsec)
- free(debugsec);
- debugsec = NULL;
- }
-
-
- /* aixcoff version of symbol file read. */
-
- static void
- aixcoff_symfile_read (objfile, addr, mainline)
- struct objfile *objfile;
- CORE_ADDR addr;
- int mainline;
- {
- int num_symbols; /* # of symbols */
- int symtab_offset; /* symbol table and */
- int stringtab_offset; /* string table file offsets */
- int val;
- bfd *abfd;
- struct coff_symfile_info *info;
- char *name;
-
- 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);
-
- /* FIXME! This stuff should move into symfile_init */
- if (info->min_lineno_offset != 0
- && info->max_lineno_offset > info->min_lineno_offset) {
-
- /* only read in the line # table if one exists */
- val = init_lineno(abfd, info->min_lineno_offset,
- info->max_lineno_offset - info->min_lineno_offset);
-
- if (val < 0)
- error("\"%s\": error reading line numbers\n", name);
- }
-
- val = init_stringtab(abfd, stringtab_offset, objfile);
- if (val < 0) {
- error ("\"%s\": can't get string table", name);
- }
-
- if (init_debugsection(abfd) < 0) {
- error ("Error reading .debug section of `%s'\n", name);
- }
-
- /* Position to read the symbol table. Do not read it all at once. */
- val = bfd_seek(abfd, (long)symtab_offset, 0);
- if (val < 0)
- perror_with_name(name);
-
- if (bfd_tell(abfd) != symtab_offset)
- fatal("bfd? BFD!");
-
- init_minimal_symbol_collection ();
- make_cleanup (discard_minimal_symbols, 0);
-
- /* Initialize load info structure. */
- if (mainline)
- xcoff_init_loadinfo ();
-
- /* Now that the executable file is positioned at symbol table,
- process it and define symbols accordingly. */
-
- read_xcoff_symtab(objfile, num_symbols);
-
- /* Free debug section. */
- free_debugsection ();
-
- /* Sort symbols alphabetically within each block. */
- sort_syms ();
-
- /* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
-
- install_minimal_symbols (objfile);
-
- /* Make a default for file to list. */
- select_source_symtab (0);
- }
-
- /* Register our ability to parse symbols for aixcoff BFD files. */
-
- static struct sym_fns aixcoff_sym_fns =
- {
- "aixcoff-rs6000", /* sym_name: name or name prefix of BFD target type */
- 15, /* sym_namelen: number of significant sym_name chars */
- aixcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */
- aixcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
- aixcoff_symfile_read, /* sym_read: read a symbol file into symtab */
- aixcoff_symfile_finish, /* sym_finish: finished with file, cleanup */
- NULL /* next: pointer to next struct sym_fns */
- };
-
- void
- _initialize_xcoffread ()
- {
- add_symtab_fns(&aixcoff_sym_fns);
- }
-
-
- /* In order to handle forward type references, we needed to have this old
- routine. Try printing the type of member `p' in the following structure
- in a dbx environment.
-
- struct s {
- ...
- struct s *p;
- };
- */
-
-
- /* Smash TYPE to be a type of pointers to TO_TYPE.
- If TO_TYPE is not permanent and has no pointer-type yet,
- record TYPE as its pointer-type. */
-
- void
- smash_to_pointer_type (type, to_type)
- struct type *type, *to_type;
- {
- /* int type_permanent = (TYPE_FLAGS (type) & TYPE_FLAG_PERM); */
-
- bzero (type, sizeof (struct type));
- TYPE_TARGET_TYPE (type) = to_type;
- /* We assume the machine has only one representation for pointers! */
- TYPE_LENGTH (type) = sizeof (char *);
- TYPE_CODE (type) = TYPE_CODE_PTR;
-
- /* ??? TYPE_TARGET_TYPE and TYPE_MAIN_VARIANT are the same. You can't do
- this. It will break the target type!!!
- TYPE_MAIN_VARIANT (type) = type;
-
- if (type_permanent)
- TYPE_FLAGS (type) |= TYPE_FLAG_PERM;
- */
-
- if (TYPE_POINTER_TYPE (to_type) == 0)
- #if 0
- && (!(TYPE_FLAGS (to_type) & TYPE_FLAG_PERM)
- || type_permanent))
- #endif /* 0 */
- {
- TYPE_POINTER_TYPE (to_type) = type;
- }
- }
-
- #else /* IBM6000_HOST */
- struct type *
- builtin_type (ignore)
- char **ignore;
- {
- fatal ("GDB internal eror: builtin_type called on non-RS/6000!");
- }
- #endif /* IBM6000_HOST */
-