diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/xcoffread.c | 1506 |
1 files changed, 1506 insertions, 0 deletions
diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c new file mode 100644 index 0000000..d3d07ca --- /dev/null +++ b/gdb/xcoffread.c @@ -0,0 +1,1506 @@ +/* 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" +#include "param.h" + +#include <stdio.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> +#include <sys/file.h> +#include <sys/stat.h> + +#include "symtab.h" +#include "symfile.h" +#include "buildsym.h" + +#include "internalcoff.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 */ + +extern char *index(); + +static void enter_line_range (); +static struct symbol *process_xcoff_symbol (); +static int read_symbol_nvalue (); +static int read_symbol_lineno (); + + +/* 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_start_addr; +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; +struct pending_stabs *file_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 */ +}; + + +/* Call sort_syms to sort alphabetically + the symbols of each block of each symtab. */ + +static int +compare_symbols (s1, s2) +struct symbol **s1, **s2; +{ + /* Names that are less should come first. */ + 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 int i, nbl; + register struct blockvector *bv; + register struct block *b; + + for (s = symtab_list; s; 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 (*stabvector, sizeof (struct pending_stabs) + + (*stabvector)->length * sizeof (char*)); + } + (*stabvector)->stab [(*stabvector)->count++] = stabname; +} + + +/* 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 */ + } + 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); + } + } +} + +/* Enter a given range of lines into the line vector. + can be called in the following two ways: + enter_line_range (subfile, beginoffset, endoffset, 0, firstLine) or + enter_line_range (subfile, beginoffset, 0, endaddr, firstLine) */ + +static void +enter_line_range (subfile, beginoffset, endoffset, endaddr, firstLine) + struct subfile *subfile; /* which sub-file to put line#s in */ + unsigned beginoffset, endoffset; /* offsets to line table */ + CORE_ADDR endaddr; + unsigned *firstLine; +{ + char *pp, *limit; + CORE_ADDR addr; + struct internal_lineno lptr; + unsigned local_linesz = coff_data (symfile_bfd)->local_linesz; + + pp = &linetab [beginoffset - linetab_offset]; + limit = endoffset ? &linetab [endoffset - linetab_offset] + : &linetab [linetab_size -1]; + + while (pp <= limit) { + + /* Swap and align this lineno entry into lptr. */ + bfd_coff_swap_lineno_in (symfile_bfd, pp, &lptr); + + /* find the address this line represents */ + addr = lptr.l_lnno ? + lptr.l_addr.l_paddr : read_symbol_nvalue (symtbl, lptr.l_addr.l_symndx); + + if (endaddr && addr >= endaddr) + return; + + if (lptr.l_lnno == 0) { + *firstLine = read_symbol_lineno (symtbl, lptr.l_addr.l_symndx); + --(*firstLine); + } + else + record_line (subfile, *firstLine + lptr.l_lnno, addr); + + pp += local_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)); \ + cur_src_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_MISC_FUNCTION(NAME, ADDR, TYPE, ALLOCED) \ +{ \ + char *namestr; \ + if (ALLOCED) \ + namestr = (NAME) + 1; \ + else { \ + namestr = obstack_copy0 (symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \ + (ALLOCED) = 1; \ + } \ + prim_record_misc_function (namestr, (ADDR), (TYPE)); \ + last_recorded_fun = (ADDR); \ +} + + + +/* 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. */ + +void +read_xcoff_symtab (objfile, nsyms) + struct objfile *objfile; /* Object file we're reading from */ + int nsyms; /* # of symbols */ +{ + bfd *abfd = objfile->obfd; + /* char *symtbl; */ /* Raw symbol table base */ + char *raw_symbol; /* Pointer into raw seething symbol table */ + char *raw_auxptr; /* Pointer to first raw aux entry for sym */ + 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 val; + int fcn_first_line; + int fcn_last_line; + int fcn_start_addr; + long fcn_line_offset; + size_t size; + + /* 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_seen_csect; + int last_recorded_fun = 0; /* last recorded fun. value */ + + /* 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_seen_csect = 0; + last_recorded_fun = 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; + + 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, 1, 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_seen_csect) { + complete_symtab (filestring, file_start_addr); + cur_src_end_addr = file_end_addr; + end_symtab (file_end_addr, 1, 1, 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_seen_csect = cs->c_name; + RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_text, symname_alloced); + } + } + 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: +#ifdef XCOFF_ADD_TOC_TO_LOADINFO + XCOFF_ADD_TOC_TO_LOADINFO (cs->c_value); +#endif + /* fall down to default case. */ + + 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: + if (cs->c_value != last_recorded_fun) + RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_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; + continue; + } + + /* shared library function entry point. */ + else if (CSECT_SCLAS (main_aux) == XMC_GL) { + if (last_recorded_fun != cs->c_value) + RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_text, + symname_alloced); + continue; + } + break; + + default : /* all other XTY_XXXs */ + break; + } /* switch CSECT_SMTYP() */ + } + + 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_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, 1, objfile); + start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0); + last_seen_csect = 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_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; + + /* value contains address of first non-init type code */ + /* main_aux.x_sym.x_misc.x_lnsz.x_lnno + contains line number of '{' } */ + fcn_first_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno; + + /* 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 */ + /* mark_first_line (fcn_line_offset, cs->c_symnum); */ + + new = push_context (0, fcn_start_addr); + new->name = process_xcoff_symbol (&fcn_cs_saved); + } + 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; +#if 0 + enter_linenos (fcn_line_offset, fcn_first_line, + fcn_first_line + fcn_last_line); +#endif + + 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); + 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 */ + push_subfile (); + start_subfile (cs->c_name, (char *)0); + fcn_first_line = cs->c_value; /* Offset to first lineno of file */ + break; + + case C_EINCL : /* end of include file */ + fcn_last_line = cs->c_value; /* Offset to last line number */ + { long dummy = 0; + enter_line_range (current_subfile, fcn_first_line, cs->c_value, 0, + &dummy); + } + start_subfile (pop_subfile (), (char *)0); + 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); + } + local_symbols = new->locals; + } + break; + + default : + (void) process_xcoff_symbol (cs); + break; + } + + } /* while */ + + if (last_source_file) + end_symtab (cur_src_end_addr, 1, 1, objfile); + + free (symtbl); +} + +#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ + (SYMBOL2) = (struct symbol *) \ + obstack_alloc (symbol_obstack, sizeof (struct symbol)); \ + *(SYMBOL2) = *(SYMBOL1); + + +#define SYMNAME_ALLOC(NAME, ALLOCED) \ + (ALLOCED) ? (NAME) : obstack_copy0 (symbol_obstack, (NAME), strlen (NAME)); + + + +/* process one xcoff symbol. */ + +static struct symbol * +process_xcoff_symbol (cs) + register struct coff_symbol *cs; +{ + struct symbol onesymbol; + register struct symbol *sym = &onesymbol; + struct symbol *sym2 = NULL; + struct type *ttype; + char *name, *pp, *qq; + + 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 (builtin_type_int); + + 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) = builtin_type_int; + + switch (cs->c_sclass) + { + 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_DECL: /* a type decleration?? */ + qq = (char*) index (name, ':'); + if (!qq) /* skip if there is no ':' */ + return NULL; + + pp = qq + 2; + ttype = SYMBOL_TYPE (sym) = read_type (&pp); + + /* 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. */ + + if (!ttype || name == qq) + return NULL; + + if (qq[1] == 'T') + SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; + else if (qq[1] == 't') + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + else { + printf ("ERROR: Unrecognized stab string.\n"); + return NULL; + } + + SYMBOL_CLASS (sym) = LOC_TYPEDEF; + SYMBOL_NAME (sym) = obsavestring (name, qq-name); + + if (SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE) + TYPE_NAME (ttype) = concat ( + TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " : + TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ", + SYMBOL_NAME (sym), ""); + + else if (!TYPE_NAME (ttype)) /* else, regular typedef. */ + TYPE_NAME (ttype) = SYMBOL_NAME (sym); + + SYMBOL_DUP (sym, sym2); + add_symbol_to_list + (sym2, within_function ? &local_symbols : &file_symbols); + break; + + case C_GSYM: + add_stab_to_list (name, &global_stabs); + break; + + case C_PSYM: + if (*name == ':' || (pp = (char *) index (name, ':')) == NULL) + return NULL; + SYMBOL_NAME (sym) = obsavestring (name, pp-name); + SYMBOL_CLASS (sym) = LOC_ARG; + pp += 2; + SYMBOL_TYPE (sym) = read_type (&pp); + SYMBOL_DUP (sym, sym2); + add_symbol_to_list (sym2, &local_symbols); + break; + + case C_STSYM: + if (*name == ':' || (pp = (char *) index (name, ':')) == NULL) + return NULL; + SYMBOL_NAME (sym) = obsavestring (name, pp-name); + SYMBOL_CLASS (sym) = LOC_STATIC; + SYMBOL_VALUE (sym) += static_block_base; + pp += 2; + SYMBOL_TYPE (sym) = read_type (&pp); + SYMBOL_DUP (sym, sym2); + add_symbol_to_list + (sym2, within_function ? &local_symbols : &file_symbols); + break; + + case C_LSYM: + if (*name == ':' || (pp = (char *) index (name, ':')) == NULL) + return NULL; + SYMBOL_NAME (sym) = obsavestring (name, pp-name); + SYMBOL_CLASS (sym) = LOC_LOCAL; + pp += 1; + SYMBOL_TYPE (sym) = read_type (&pp); + 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: + pp = (char*) index (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); + pp += 2; + if (*pp) + SYMBOL_TYPE (sym) = read_type (&pp); + } + 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) ? + builtin_type_int : builtin_type_float; + + SYMBOL_DUP (sym, sym2); + add_symbol_to_list (sym2, &local_symbols); + break; + + default : + printf ("ERROR: Unexpected storage class: %d.\n", 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 += 1 + 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; +void *vpinfo; +{ + struct coff_symfile_info *info; + int size, count; + file_ptr offset, maxoff; + + count = asect->lineno_count; + + if (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; +} + + +void +dump_strtbl () +{ + int ii; + printf ("===STRING TABLE DUMP...\n\n"); + for ( ii=0; ii < strtbl_len; ++ii ) + printf ("%c", isprint (*(strtbl+ii)) ? *(strtbl+ii) : ' '); + printf ("\n"); +} + +void +dump_linetable (ltb) + struct linetable *ltb; +{ + int ii; + for (ii=0; ii < ltb->nitems; ++ii) + printf ("line: %d, addr: 0x%x\n", ltb->item[ii].line, ltb->item[ii].pc); +} + +void +dump_type (typeP) + struct type *typeP; +{ + printf ("0x%x: name: %s\n", typeP, typeP->name ? typeP->name : "(nil)"); +} + +char *dump_namespace (); +char *dump_addrclass (); + +void +dump_symbol (pp) + struct symbol *pp; +{ + printf (" sym: %s\t%s,\t%s\ttype: 0x%x, val: 0x%x end: 0x%x\n", + pp->name, dump_namespace (pp->namespace), + dump_addrclass (pp->class), pp->type, + SYMBOL_CLASS(pp) == LOC_BLOCK ? BLOCK_START(SYMBOL_BLOCK_VALUE(pp)) + : pp->value.value, + SYMBOL_CLASS(pp) == LOC_BLOCK ? BLOCK_END(SYMBOL_BLOCK_VALUE(pp)) : 0); +} + + +char * +dump_namespace (ns) +int ns; +{ + static char *ns_name [] = { + "UNDEF_NS", "VAR_NS", "STRUCT_NS", "LABEL_NS"}; + + switch (ns) { + case UNDEF_NAMESPACE: + case VAR_NAMESPACE: + case STRUCT_NAMESPACE: + case LABEL_NAMESPACE: + return ns_name[ns]; + } + + return "***ERROR***"; +} + + +char * +dump_addrclass (ac) +int ac; /* address class */ +{ + static char *ac_name [] = { + "LOC_UNDEF", + "LOC_CONST", + "LOC_STATIC", + "LOC_REGISTER", + "LOC_ARG", + "LOC_REF_ARG", + "LOC_REGPARM", + "LOC_LOCAL", + "LOC_TYPEDEF", + "LOC_LABEL", + "LOC_BLOCK", + "LOC_CONST_BYTES", + "LOC_LOCAL_ARG", + }; + switch (ac) { + case LOC_UNDEF: + case LOC_CONST: + case LOC_STATIC: + case LOC_REGISTER: + case LOC_ARG: + case LOC_REF_ARG: + case LOC_REGPARM: + case LOC_LOCAL: + case LOC_TYPEDEF: + case LOC_LABEL: + case LOC_BLOCK: + case LOC_CONST_BYTES: + case LOC_LOCAL_ARG: + return ac_name [ac]; + } + return "***ERROR***"; +} + +void +dump_block (pp) + struct block *pp; +{ + int ii; + printf ("BLOCK..: start: 0x%x, end: 0x%x\n", pp->startaddr, pp->endaddr); + for (ii=0; ii < pp->nsyms; ++ii) + dump_symbol (pp->sym[ii]); +} + +void +dump_blockvector (pp) + struct blockvector *pp; +{ + int ii; + for (ii=0; ii < pp->nblocks; ++ii) + dump_block (pp->block [ii]); +} + + +void +dump_last_symtab (pp) + struct symtab *pp; +{ + for ( ; pp; pp = pp->next) { + if ( pp->next == 0 ) { + printf ("SYMTAB NAME: %s\n", pp->filename); + dump_blockvector (pp->blockvector); + } + } +} + +void +dump_symtabs (pp) + struct symtab *pp; +{ + for ( ; pp; pp = pp->next) { + printf ("SYMTAB NAME: %s\n", pp->filename ? pp->filename : "(nil)"); +/* if (pp->linetable) + dump_linetable (pp->linetable); */ + dump_blockvector (pp->blockvector); + } +} + +void +dump_symtab_lines (pp) + struct symtab *pp; +{ + for ( ; pp; pp = pp->next) { + printf ("SYMTAB NAME: %s\n", pp->filename ? pp->filename : "(nil)"); + if (pp->linetable) + dump_linetable (pp->linetable); + /* dump_blockvector (pp->blockvector); */ + } +} + +void +dump_misc_funcs () +{ + int ii; + for (ii=0; ii < misc_function_count; ++ii) + printf ("name: %s, addr: 0x%x\n", + misc_function_vector[ii].name, + misc_function_vector[ii].address); +} + + +/* 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. */ + +#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 builtin_type_int; + case 2: + return builtin_type_char; + case 3: + return builtin_type_short; + case 4: + return builtin_type_long; + case 5: + return builtin_type_unsigned_char; + case 6: + return builtin_type_char; /* requires a builtin `signed char' */ + case 7: + return builtin_type_unsigned_short; + case 8: + return builtin_type_unsigned_int; + case 9: + return builtin_type_unsigned_int; + case 10: + return builtin_type_unsigned_long; + case 11: + return builtin_type_void; + case 12: + return builtin_type_float; + case 13: + return builtin_type_double; + case 14: + return builtin_type_double; /* requires a builtin `long double' */ + case 15: + return builtin_type_int; /* requires a builtin `integer' */ + case 16: + return builtin_type_int; /* requires builtin `boolean' */ + case 17: + return builtin_type_float; /* requires builtin `short real' */ + case 18: + return builtin_type_float; /* requires builtin `real' */ + default : + printf ("ERROR! Unknown builtin type -%d\n", typenums[1]); + return NULL; + } +} + +/* 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 in misc_function_vector. */ + +struct symbol * +build_function_symbol (ind) + int ind; +{ + struct symbol *sym = + (struct symbol *) obstack_alloc (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 (builtin_type_int); + SYMBOL_BLOCK_VALUE (sym) = (struct block *) + obstack_alloc (symbol_obstack, sizeof (struct block)); + BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) = misc_function_vector[ind].address; + return sym; +} + + +void +aixcoff_new_init () +{ + /* Nothin' to do. */ +} + +void +aixcoff_symfile_init (sf) +struct sym_fns *sf; +{ + bfd *abfd = sf->sym_bfd; + + /* Allocate struct to keep track of the symfile */ + /* FIXME memory leak */ + sf->sym_private = xmalloc(sizeof (struct coff_symfile_info)); + + /* + * Save startup file's range of PC addresses to help + * blockframe.c decide where the bottom of the stack is. + */ + if (bfd_get_file_flags(abfd) & EXEC_P) { + entry_point = bfd_get_start_address(abfd); + } else { + entry_point = ~0; + /* set the startup file to be an empty range. */ + startup_file_start = 0; + startup_file_end = 0; + } +} + + +static int +init_stringtab(abfd, offset) + bfd *abfd; + long offset; +{ + 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 (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 = (void *) 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. */ + +void +aixcoff_symfile_read (sf, addr, mainline) + struct sym_fns *sf; + 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 = (void*) sf->sym_private; + char *name; + + symfile_bfd = abfd = sf->objfile->obfd; + name = sf->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); + 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_misc_bunches (); + make_cleanup(discard_misc_bunches, 0); + +#ifdef XCOFF_INIT_LOADINFO + if (mainline) + XCOFF_INIT_LOADINFO (); +#endif + + /* Now that the executable file is positioned at symbol table, + process it and define symbols accordingly. */ + + read_xcoff_symtab(sf->objfile, num_symbols); + + make_cleanup(free_debugsection, 0); + + /* Sort symbols alphabetically within each block. */ + sort_syms (); + + /* Go over the misc functions and install them in vector. */ + condense_misc_bunches (!mainline); + + /* 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", 15, + aixcoff_new_init, aixcoff_symfile_init, + aixcoff_symfile_read, +}; + +void +_initialize_xcoffread () +{ + add_symtab_fns(&aixcoff_sym_fns); +} |