diff options
Diffstat (limited to 'contrib/gdb/gdb/xcoffread.c')
| -rw-r--r-- | contrib/gdb/gdb/xcoffread.c | 3033 |
1 files changed, 3033 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/xcoffread.c b/contrib/gdb/gdb/xcoffread.c new file mode 100644 index 0000000..759dfcb --- /dev/null +++ b/contrib/gdb/gdb/xcoffread.c @@ -0,0 +1,3033 @@ +/* Read AIX xcoff symbol tables and convert to internal format, for GDB. + Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, + 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. + Derived from coffread.c, dbxread.c, and a lot of hacking. + Contributed by IBM Corporation. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "bfd.h" + +#include <sys/types.h> +#include <fcntl.h> +#include <ctype.h> +#include "gdb_string.h" + +#include <sys/param.h> +#ifndef NO_SYS_FILE +#include <sys/file.h> +#endif +#include "gdb_stat.h" + +#include "coff/internal.h" +#include "libcoff.h" /* FIXME, internal data from BFD */ +#include "coff/xcoff.h" +#include "libxcoff.h" +#include "coff/rs6000.h" + +#include "symtab.h" +#include "gdbtypes.h" +/* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */ +#include "symfile.h" +#include "objfiles.h" +#include "buildsym.h" +#include "stabsread.h" +#include "expression.h" +#include "complaints.h" + +#include "gdb-stabs.h" + +/* For interface with stabsread.c. */ +#include "aout/stab_gnu.h" + + +/* We put a pointer to this structure in the read_symtab_private field + of the psymtab. */ + +struct symloc + { + + /* First symbol number for this file. */ + + int first_symnum; + + /* Number of symbols in the section of the symbol table devoted to + this file's symbols (actually, the section bracketed may contain + more than just this file's symbols). If numsyms is 0, the only + reason for this thing's existence is the dependency list. Nothing + else will happen when it is read in. */ + + int numsyms; + + /* Position of the start of the line number information for this psymtab. */ + unsigned int lineno_off; + }; + +/* Remember what we deduced to be the source language of this psymtab. */ + +static enum language psymtab_language = language_unknown; + + +/* Simplified internal version of coff symbol table information */ + +struct coff_symbol + { + char *c_name; + int c_symnum; /* symbol number of this entry */ + int c_naux; /* 0 if syment only, 1 if syment + auxent */ + long c_value; + unsigned char c_sclass; + int c_secnum; + unsigned int c_type; + }; + +/* last function's saved coff symbol `cs' */ + +static struct coff_symbol fcn_cs_saved; + +static bfd *symfile_bfd; + +/* Core address of start and end of text of current source file. + This is calculated from the first function seen after a C_FILE + symbol. */ + + +static CORE_ADDR cur_src_end_addr; + +/* Core address of the end of the first object file. */ + +static CORE_ADDR first_object_file_end; + +/* initial symbol-table-debug-string vector length */ + +#define INITIAL_STABVECTOR_LENGTH 40 + +/* Nonzero if within a function (so symbols should be local, + if nothing says specifically). */ + +int within_function; + +/* Size of a COFF symbol. I think it is always 18, so I'm not sure + there is any reason not to just use a #define, but might as well + ask BFD for the size and store it here, I guess. */ + +static unsigned local_symesz; + +struct coff_symfile_info + { + file_ptr min_lineno_offset; /* Where in file lowest line#s are */ + file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ + + /* Pointer to the string table. */ + char *strtbl; + + /* Pointer to debug section. */ + char *debugsec; + + /* Pointer to the a.out symbol table. */ + char *symtbl; + + /* Number of symbols in symtbl. */ + int symtbl_num_syms; + + /* Offset in data section to TOC anchor. */ + CORE_ADDR toc_offset; + }; + +static void +bf_notfound_complaint (void) +{ + complaint (&symfile_complaints, "line numbers off, `.bf' symbol not found"); +} + +static void +ef_complaint (int arg1) +{ + complaint (&symfile_complaints, + "Mismatched .ef symbol ignored starting at symnum %d", arg1); +} + +static void +eb_complaint (int arg1) +{ + complaint (&symfile_complaints, + "Mismatched .eb symbol ignored starting at symnum %d", arg1); +} + +static void xcoff_initial_scan (struct objfile *, int); + +static void scan_xcoff_symtab (struct objfile *); + +static char *xcoff_next_symbol_text (struct objfile *); + +static void record_include_begin (struct coff_symbol *); + +static void +enter_line_range (struct subfile *, unsigned, unsigned, + CORE_ADDR, CORE_ADDR, unsigned *); + +static void init_stringtab (bfd *, file_ptr, struct objfile *); + +static void xcoff_symfile_init (struct objfile *); + +static void xcoff_new_init (struct objfile *); + +static void xcoff_symfile_finish (struct objfile *); + +static void xcoff_symfile_offsets (struct objfile *, + struct section_addr_info *addrs); + +static char *coff_getfilename (union internal_auxent *, struct objfile *); + +static void read_symbol (struct internal_syment *, int); + +static int read_symbol_lineno (int); + +static CORE_ADDR read_symbol_nvalue (int); + +static struct symbol *process_xcoff_symbol (struct coff_symbol *, + struct objfile *); + +static void read_xcoff_symtab (struct partial_symtab *); + +#if 0 +static void add_stab_to_list (char *, struct pending_stabs **); +#endif + +static int compare_lte (const void *, const void *); + +static struct linetable *arrange_linetable (struct linetable *); + +static void record_include_end (struct coff_symbol *); + +static void process_linenos (CORE_ADDR, CORE_ADDR); + + +/* Translate from a COFF section number (target_index) to a SECT_OFF_* + code. */ +static int secnum_to_section (int, struct objfile *); +static asection *secnum_to_bfd_section (int, struct objfile *); + +struct find_targ_sec_arg + { + int targ_index; + int *resultp; + asection **bfd_sect; + struct objfile *objfile; + }; + +static void find_targ_sec (bfd *, asection *, void *); + +static void +find_targ_sec (bfd *abfd, asection *sect, void *obj) +{ + struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; + struct objfile *objfile = args->objfile; + if (sect->target_index == args->targ_index) + { + /* This is the section. Figure out what SECT_OFF_* code it is. */ + if (bfd_get_section_flags (abfd, sect) & SEC_CODE) + *args->resultp = SECT_OFF_TEXT (objfile); + else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) + *args->resultp = SECT_OFF_DATA (objfile); + else + *args->resultp = sect->index; + *args->bfd_sect = sect; + } +} + +/* Return the section number (SECT_OFF_*) that CS points to. */ +static int +secnum_to_section (int secnum, struct objfile *objfile) +{ + int off = SECT_OFF_TEXT (objfile); + asection *sect = NULL; + struct find_targ_sec_arg args; + args.targ_index = secnum; + args.resultp = &off; + args.bfd_sect = § + args.objfile = objfile; + bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); + return off; +} + +/* Return the BFD section that CS points to. */ +static asection * +secnum_to_bfd_section (int secnum, struct objfile *objfile) +{ + int off = SECT_OFF_TEXT (objfile); + asection *sect = NULL; + struct find_targ_sec_arg args; + args.targ_index = secnum; + args.resultp = &off; + args.bfd_sect = § + args.objfile = objfile; + bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); + return sect; +} + +/* add a given stab string into given stab vector. */ + +#if 0 + +static void +add_stab_to_list (char *stabname, struct pending_stabs **stabvector) +{ + if (*stabvector == NULL) + { + *stabvector = (struct pending_stabs *) + xmalloc (sizeof (struct pending_stabs) + + INITIAL_STABVECTOR_LENGTH * sizeof (char *)); + (*stabvector)->count = 0; + (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; + } + else if ((*stabvector)->count >= (*stabvector)->length) + { + (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; + *stabvector = (struct pending_stabs *) + xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + + (*stabvector)->length * sizeof (char *)); + } + (*stabvector)->stab[(*stabvector)->count++] = stabname; +} + +#endif + /* *INDENT-OFF* */ +/* Linenos are processed on a file-by-file basis. + + Two reasons: + + 1) xlc (IBM's native c compiler) postpones static function code + emission to the end of a compilation unit. This way it can + determine if those functions (statics) are needed or not, and + can do some garbage collection (I think). This makes line + numbers and corresponding addresses unordered, and we end up + with a line table like: + + + lineno addr + foo() 10 0x100 + 20 0x200 + 30 0x300 + + foo3() 70 0x400 + 80 0x500 + 90 0x600 + + static foo2() + 40 0x700 + 50 0x800 + 60 0x900 + + and that breaks gdb's binary search on line numbers, if the + above table is not sorted on line numbers. And that sort + should be on function based, since gcc can emit line numbers + like: + + 10 0x100 - for the init/test part of a for stmt. + 20 0x200 + 30 0x300 + 10 0x400 - for the increment part of a for stmt. + + arrange_linetable() will do this sorting. + + 2) aix symbol table might look like: + + c_file // beginning of a new file + .bi // beginning of include file + .ei // end of include file + .bi + .ei + + basically, .bi/.ei pairs do not necessarily encapsulate + their scope. They need to be recorded, and processed later + on when we come the end of the compilation unit. + Include table (inclTable) and process_linenos() handle + that. */ +/* *INDENT-ON* */ + + + +/* compare line table entry addresses. */ + +static int +compare_lte (const void *lte1p, const void *lte2p) +{ + struct linetable_entry *lte1 = (struct linetable_entry *) lte1p; + struct linetable_entry *lte2 = (struct linetable_entry *) lte2p; + return lte1->pc - lte2->pc; +} + +/* Given a line table with function entries are marked, arrange its functions + in ascending order and strip off function entry markers and return it in + a newly created table. If the old one is good enough, return the old one. */ +/* FIXME: I think all this stuff can be replaced by just passing + sort_linevec = 1 to end_symtab. */ + +static struct linetable * +arrange_linetable (struct linetable *oldLineTb) +{ + int ii, jj, newline, /* new line count */ + function_count; /* # of functions */ + + struct linetable_entry *fentry; /* function entry vector */ + int fentry_size; /* # of function entries */ + struct linetable *newLineTb; /* new line table */ + +#define NUM_OF_FUNCTIONS 20 + + fentry_size = NUM_OF_FUNCTIONS; + fentry = (struct linetable_entry *) + xmalloc (fentry_size * sizeof (struct linetable_entry)); + + for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii) + { + + if (oldLineTb->item[ii].line == 0) + { /* function entry found. */ + + if (function_count >= fentry_size) + { /* make sure you have room. */ + fentry_size *= 2; + fentry = (struct linetable_entry *) + xrealloc (fentry, fentry_size * sizeof (struct linetable_entry)); + } + fentry[function_count].line = ii; + fentry[function_count].pc = oldLineTb->item[ii].pc; + ++function_count; + } + } + + if (function_count == 0) + { + xfree (fentry); + return oldLineTb; + } + else if (function_count > 1) + qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte); + + /* allocate a new line table. */ + newLineTb = (struct linetable *) + xmalloc + (sizeof (struct linetable) + + (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); + + /* if line table does not start with a function beginning, copy up until + a function begin. */ + + newline = 0; + if (oldLineTb->item[0].line != 0) + for (newline = 0; + newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) + newLineTb->item[newline] = oldLineTb->item[newline]; + + /* Now copy function lines one by one. */ + + for (ii = 0; ii < function_count; ++ii) + { + for (jj = fentry[ii].line + 1; + jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; + ++jj, ++newline) + newLineTb->item[newline] = oldLineTb->item[jj]; + } + xfree (fentry); + newLineTb->nitems = oldLineTb->nitems - function_count; + return newLineTb; +} + +/* include file support: C_BINCL/C_EINCL pairs will be kept in the + following `IncludeChain'. At the end of each symtab (end_symtab), + we will determine if we should create additional symtab's to + represent if (the include files. */ + + +typedef struct _inclTable +{ + char *name; /* include filename */ + + /* Offsets to the line table. end points to the last entry which is + part of this include file. */ + int begin, end; + + struct subfile *subfile; + unsigned funStartLine; /* start line # of its function */ +} +InclTable; + +#define INITIAL_INCLUDE_TABLE_LENGTH 20 +static InclTable *inclTable; /* global include table */ +static int inclIndx; /* last entry to table */ +static int inclLength; /* table length */ +static int inclDepth; /* nested include depth */ + +static void allocate_include_entry (void); + +static void +record_include_begin (struct coff_symbol *cs) +{ + if (inclDepth) + { + /* In xcoff, we assume include files cannot be nested (not in .c files + of course, but in corresponding .s files.). */ + + /* This can happen with old versions of GCC. + GCC 2.3.3-930426 does not exhibit this on a test case which + a user said produced the message for him. */ + complaint (&symfile_complaints, "Nested C_BINCL symbols"); + } + ++inclDepth; + + allocate_include_entry (); + + inclTable[inclIndx].name = cs->c_name; + inclTable[inclIndx].begin = cs->c_value; +} + +static void +record_include_end (struct coff_symbol *cs) +{ + InclTable *pTbl; + + if (inclDepth == 0) + { + complaint (&symfile_complaints, "Mismatched C_BINCL/C_EINCL pair"); + } + + allocate_include_entry (); + + pTbl = &inclTable[inclIndx]; + pTbl->end = cs->c_value; + + --inclDepth; + ++inclIndx; +} + +static void +allocate_include_entry (void) +{ + if (inclTable == NULL) + { + inclTable = (InclTable *) + xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); + memset (inclTable, + '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); + inclLength = INITIAL_INCLUDE_TABLE_LENGTH; + inclIndx = 0; + } + else if (inclIndx >= inclLength) + { + inclLength += INITIAL_INCLUDE_TABLE_LENGTH; + inclTable = (InclTable *) + xrealloc (inclTable, sizeof (InclTable) * inclLength); + memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, + '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); + } +} + +/* Global variable to pass the psymtab down to all the routines involved + in psymtab to symtab processing. */ +static struct partial_symtab *this_symtab_psymtab; + +/* given the start and end addresses of a compilation unit (or a csect, + at times) process its lines and create appropriate line vectors. */ + +static void +process_linenos (CORE_ADDR start, CORE_ADDR end) +{ + int offset, ii; + file_ptr max_offset = + ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) + ->max_lineno_offset; + + /* subfile structure for the main compilation unit. */ + struct subfile main_subfile; + + /* In the main source file, any time we see a function entry, we + reset this variable to function's absolute starting line number. + All the following line numbers in the function are relative to + this, and we record absolute line numbers in record_line(). */ + + unsigned int main_source_baseline = 0; + + unsigned *firstLine; + + offset = + ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; + if (offset == 0) + goto return_after_cleanup; + + memset (&main_subfile, '\0', sizeof (main_subfile)); + + if (inclIndx == 0) + /* All source lines were in the main source file. None in include files. */ + + enter_line_range (&main_subfile, offset, 0, start, end, + &main_source_baseline); + + else + { + /* There was source with line numbers in include files. */ + + int linesz = + coff_data (this_symtab_psymtab->objfile->obfd)->local_linesz; + main_source_baseline = 0; + + for (ii = 0; ii < inclIndx; ++ii) + { + struct subfile *tmpSubfile; + + /* If there is main file source before include file, enter it. */ + if (offset < inclTable[ii].begin) + { + enter_line_range + (&main_subfile, offset, inclTable[ii].begin - linesz, + start, 0, &main_source_baseline); + } + + /* Have a new subfile for the include file. */ + + tmpSubfile = inclTable[ii].subfile = + (struct subfile *) xmalloc (sizeof (struct subfile)); + + memset (tmpSubfile, '\0', sizeof (struct subfile)); + firstLine = &(inclTable[ii].funStartLine); + + /* Enter include file's lines now. */ + enter_line_range (tmpSubfile, inclTable[ii].begin, + inclTable[ii].end, start, 0, firstLine); + + if (offset <= inclTable[ii].end) + offset = inclTable[ii].end + linesz; + } + + /* All the include files' line have been processed at this point. Now, + enter remaining lines of the main file, if any left. */ + if (offset < max_offset + 1 - linesz) + { + enter_line_range (&main_subfile, offset, 0, start, end, + &main_source_baseline); + } + } + + /* Process main file's line numbers. */ + if (main_subfile.line_vector) + { + struct linetable *lineTb, *lv; + + lv = main_subfile.line_vector; + + /* Line numbers are not necessarily ordered. xlc compilation will + put static function to the end. */ + + lineTb = arrange_linetable (lv); + if (lv == lineTb) + { + current_subfile->line_vector = (struct linetable *) + xrealloc (lv, (sizeof (struct linetable) + + lv->nitems * sizeof (struct linetable_entry))); + } + else + { + xfree (lv); + current_subfile->line_vector = lineTb; + } + + current_subfile->line_vector_length = + current_subfile->line_vector->nitems; + } + + /* Now, process included files' line numbers. */ + + for (ii = 0; ii < inclIndx; ++ii) + { + if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */ + { + struct linetable *lineTb, *lv; + + lv = (inclTable[ii].subfile)->line_vector; + + /* Line numbers are not necessarily ordered. xlc compilation will + put static function to the end. */ + + lineTb = arrange_linetable (lv); + + push_subfile (); + + /* For the same include file, we might want to have more than one + subfile. This happens if we have something like: + + ...... + #include "foo.h" + ...... + #include "foo.h" + ...... + + while foo.h including code in it. (stupid but possible) + Since start_subfile() looks at the name and uses an + existing one if finds, we need to provide a fake name and + fool it. */ + +#if 0 + start_subfile (inclTable[ii].name, (char *) 0); +#else + { + /* Pick a fake name that will produce the same results as this + one when passed to deduce_language_from_filename. Kludge on + top of kludge. */ + char *fakename = strrchr (inclTable[ii].name, '.'); + if (fakename == NULL) + fakename = " ?"; + start_subfile (fakename, (char *) 0); + xfree (current_subfile->name); + } + current_subfile->name = xstrdup (inclTable[ii].name); +#endif + + if (lv == lineTb) + { + current_subfile->line_vector = + (struct linetable *) xrealloc + (lv, (sizeof (struct linetable) + + lv->nitems * sizeof (struct linetable_entry))); + + } + else + { + xfree (lv); + current_subfile->line_vector = lineTb; + } + + current_subfile->line_vector_length = + current_subfile->line_vector->nitems; + start_subfile (pop_subfile (), (char *) 0); + } + } + +return_after_cleanup: + + /* We don't want to keep alloc/free'ing the global include file table. */ + inclIndx = 0; + + /* Start with a fresh subfile structure for the next file. */ + memset (&main_subfile, '\0', sizeof (struct subfile)); +} + +void +aix_process_linenos (void) +{ + /* process line numbers and enter them into line vector */ + process_linenos (last_source_start_addr, cur_src_end_addr); +} + + +/* Enter a given range of lines into the line vector. + can be called in the following two ways: + enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or + enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) + + endoffset points to the last line table entry that we should pay + attention to. */ + +static void +enter_line_range (struct subfile *subfile, unsigned beginoffset, unsigned endoffset, /* offsets to line table */ + CORE_ADDR startaddr, /* offsets to line table */ + CORE_ADDR endaddr, unsigned *firstLine) +{ + unsigned int curoffset; + CORE_ADDR addr; + void *ext_lnno; + struct internal_lineno int_lnno; + unsigned int limit_offset; + bfd *abfd; + int linesz; + + if (endoffset == 0 && startaddr == 0 && endaddr == 0) + return; + curoffset = beginoffset; + limit_offset = + ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) + ->max_lineno_offset; + + if (endoffset != 0) + { + if (endoffset >= limit_offset) + { + complaint (&symfile_complaints, + "Bad line table offset in C_EINCL directive"); + return; + } + limit_offset = endoffset; + } + else + limit_offset -= 1; + + abfd = this_symtab_psymtab->objfile->obfd; + linesz = coff_data (abfd)->local_linesz; + ext_lnno = alloca (linesz); + + while (curoffset <= limit_offset) + { + bfd_seek (abfd, curoffset, SEEK_SET); + bfd_bread (ext_lnno, linesz, abfd); + bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno); + + /* Find the address this line represents. */ + addr = (int_lnno.l_lnno + ? int_lnno.l_addr.l_paddr + : read_symbol_nvalue (int_lnno.l_addr.l_symndx)); + addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets, + SECT_OFF_TEXT (this_symtab_psymtab->objfile)); + + if (addr < startaddr || (endaddr && addr >= endaddr)) + return; + + if (int_lnno.l_lnno == 0) + { + *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); + record_line (subfile, 0, addr); + --(*firstLine); + } + else + record_line (subfile, *firstLine + int_lnno.l_lnno, addr); + curoffset += linesz; + } +} + + +/* Save the vital information for use when closing off the current file. + NAME is the file name the symbols came from, START_ADDR is the first + text address for the file, and SIZE is the number of bytes of text. */ + +#define complete_symtab(name, start_addr) { \ + last_source_file = savestring (name, strlen (name)); \ + last_source_start_addr = start_addr; \ +} + + +/* Refill the symbol table input buffer + and set the variables that control fetching entries from it. + Reports an error if no data available. + This function can read past the end of the symbol table + (into the string table) but this does no harm. */ + +/* Reading symbol table has to be fast! Keep the followings as macros, rather + than functions. */ + +#define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \ +{ \ + char *namestr; \ + namestr = (NAME); \ + if (namestr[0] == '.') ++namestr; \ + prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \ + (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \ + misc_func_recorded = 1; \ +} + + +/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be + nested. At any given time, a symbol can only be in one static block. + This is the base address of current static block, zero if non exists. */ + +static int static_block_base = 0; + +/* Section number for the current static block. */ + +static int static_block_section = -1; + +/* true if space for symbol name has been allocated. */ + +static int symname_alloced = 0; + +/* Next symbol to read. Pointer into raw seething symbol table. */ + +static char *raw_symbol; + +/* This is the function which stabsread.c calls to get symbol + continuations. */ + +static char * +xcoff_next_symbol_text (struct objfile *objfile) +{ + struct internal_syment symbol; + char *retval; + /* FIXME: is this the same as the passed arg? */ + objfile = this_symtab_psymtab->objfile; + + bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol); + if (symbol.n_zeroes) + { + complaint (&symfile_complaints, "Unexpected symbol continuation"); + + /* Return something which points to '\0' and hope the symbol reading + code does something reasonable. */ + retval = ""; + } + else if (symbol.n_sclass & 0x80) + { + retval = + ((struct coff_symfile_info *) objfile->sym_private)->debugsec + + symbol.n_offset; + raw_symbol += + coff_data (objfile->obfd)->local_symesz; + ++symnum; + } + else + { + complaint (&symfile_complaints, "Unexpected symbol continuation"); + + /* Return something which points to '\0' and hope the symbol reading + code does something reasonable. */ + retval = ""; + } + return retval; +} + +/* Read symbols for a given partial symbol table. */ + +static void +read_xcoff_symtab (struct partial_symtab *pst) +{ + struct objfile *objfile = pst->objfile; + bfd *abfd = objfile->obfd; + char *raw_auxptr; /* Pointer to first raw aux entry for sym */ + char *strtbl = ((struct coff_symfile_info *) objfile->sym_private)->strtbl; + char *debugsec = + ((struct coff_symfile_info *) objfile->sym_private)->debugsec; + char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF"; + + struct internal_syment symbol[1]; + union internal_auxent main_aux; + struct coff_symbol cs[1]; + CORE_ADDR file_start_addr = 0; + CORE_ADDR file_end_addr = 0; + + int next_file_symnum = -1; + unsigned int max_symnum; + int just_started = 1; + int depth = 0; + int fcn_start_addr = 0; + + struct coff_symbol fcn_stab_saved; + + /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ + union internal_auxent fcn_aux_saved; + struct context_stack *new; + + char *filestring = " _start_ "; /* Name of the current file. */ + + char *last_csect_name; /* last seen csect's name and value */ + CORE_ADDR last_csect_val; + int last_csect_sec; + + this_symtab_psymtab = pst; + + /* Get the appropriate COFF "constants" related to the file we're + handling. */ + local_symesz = coff_data (abfd)->local_symesz; + + last_source_file = NULL; + last_csect_name = 0; + last_csect_val = 0; + + start_stabs (); + start_symtab (filestring, (char *) NULL, file_start_addr); + record_debugformat (debugfmt); + symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum; + max_symnum = + symnum + ((struct symloc *) pst->read_symtab_private)->numsyms; + first_object_file_end = 0; + + raw_symbol = + ((struct coff_symfile_info *) objfile->sym_private)->symtbl + + symnum * local_symesz; + + while (symnum < max_symnum) + { + + QUIT; /* make this command interruptable. */ + + /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ + /* read one symbol into `cs' structure. After processing the + whole symbol table, only string table will be kept in memory, + symbol table and debug section of xcoff will be freed. Thus + we can mark symbols with names in string table as + `alloced'. */ + { + int ii; + + /* Swap and align the symbol into a reasonable C structure. */ + bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); + + cs->c_symnum = symnum; + cs->c_naux = symbol->n_numaux; + if (symbol->n_zeroes) + { + symname_alloced = 0; + /* We must use the original, unswapped, name here so the name field + pointed to by cs->c_name will persist throughout xcoffread. If + we use the new field, it gets overwritten for each symbol. */ + cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name; + /* If it's exactly E_SYMNMLEN characters long it isn't + '\0'-terminated. */ + if (cs->c_name[E_SYMNMLEN - 1] != '\0') + { + char *p; + p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1); + strncpy (p, cs->c_name, E_SYMNMLEN); + p[E_SYMNMLEN] = '\0'; + cs->c_name = p; + symname_alloced = 1; + } + } + else if (symbol->n_sclass & 0x80) + { + cs->c_name = debugsec + symbol->n_offset; + symname_alloced = 0; + } + else + { + /* in string table */ + cs->c_name = strtbl + (int) symbol->n_offset; + symname_alloced = 1; + } + cs->c_value = symbol->n_value; + cs->c_sclass = symbol->n_sclass; + cs->c_secnum = symbol->n_scnum; + cs->c_type = (unsigned) symbol->n_type; + + raw_symbol += local_symesz; + ++symnum; + + /* Save addr of first aux entry. */ + raw_auxptr = raw_symbol; + + /* Skip all the auxents associated with this symbol. */ + for (ii = symbol->n_numaux; ii; --ii) + { + raw_symbol += coff_data (abfd)->local_auxesz; + ++symnum; + } + } + + /* if symbol name starts with ".$" or "$", ignore it. */ + if (cs->c_name[0] == '$' + || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) + continue; + + if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) + { + if (last_source_file) + { + pst->symtab = + end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT (objfile)); + end_stabs (); + } + + start_stabs (); + start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0); + record_debugformat (debugfmt); + cur_src_end_addr = first_object_file_end; + /* done with all files, everything from here on is globals */ + } + + if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) + && cs->c_naux == 1) + { + /* Dealing with a symbol with a csect entry. */ + +#define CSECT(PP) ((PP)->x_csect) +#define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l) +#define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) +#define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) +#define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) + + /* Convert the auxent to something we can access. */ + bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, + 0, cs->c_naux, &main_aux); + + switch (CSECT_SMTYP (&main_aux)) + { + + case XTY_ER: + /* Ignore all external references. */ + continue; + + case XTY_SD: + /* A section description. */ + { + switch (CSECT_SCLAS (&main_aux)) + { + + case XMC_PR: + { + + /* A program csect is seen. We have to allocate one + symbol table for each program csect. Normally gdb + prefers one symtab for each source file. In case + of AIX, one source file might include more than one + [PR] csect, and they don't have to be adjacent in + terms of the space they occupy in memory. Thus, one + single source file might get fragmented in the + memory and gdb's file start and end address + approach does not work! GCC (and I think xlc) seem + to put all the code in the unnamed program csect. */ + + if (last_csect_name) + { + complete_symtab (filestring, file_start_addr); + cur_src_end_addr = file_end_addr; + end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); + end_stabs (); + start_stabs (); + /* Give all csects for this source file the same + name. */ + start_symtab (filestring, NULL, (CORE_ADDR) 0); + record_debugformat (debugfmt); + } + + /* If this is the very first csect seen, + basically `__start'. */ + if (just_started) + { + first_object_file_end + = cs->c_value + CSECT_LEN (&main_aux); + just_started = 0; + } + + file_start_addr = + cs->c_value + ANOFFSET (objfile->section_offsets, + SECT_OFF_TEXT (objfile)); + file_end_addr = file_start_addr + CSECT_LEN (&main_aux); + + if (cs->c_name && (cs->c_name[0] == '.' + || cs->c_name[0] == '@')) + { + last_csect_name = cs->c_name; + last_csect_val = cs->c_value; + last_csect_sec = secnum_to_section (cs->c_secnum, objfile); + } + } + continue; + + /* All other symbols are put into the minimal symbol + table only. */ + + case XMC_RW: + continue; + + case XMC_TC0: + continue; + + case XMC_TC: + continue; + + default: + /* Ignore the symbol. */ + continue; + } + } + break; + + case XTY_LD: + + switch (CSECT_SCLAS (&main_aux)) + { + case XMC_PR: + /* a function entry point. */ + function_entry_point: + + fcn_start_addr = cs->c_value; + + /* save the function header info, which will be used + when `.bf' is seen. */ + fcn_cs_saved = *cs; + fcn_aux_saved = main_aux; + continue; + + case XMC_GL: + /* shared library function trampoline code entry point. */ + continue; + + case XMC_DS: + /* The symbols often have the same names as debug symbols for + functions, and confuse lookup_symbol. */ + continue; + + default: + /* xlc puts each variable in a separate csect, so we get + an XTY_SD for each variable. But gcc puts several + variables in a csect, so that each variable only gets + an XTY_LD. This will typically be XMC_RW; I suspect + XMC_RO and XMC_BS might be possible too. + These variables are put in the minimal symbol table + only. */ + continue; + } + break; + + case XTY_CM: + /* Common symbols are put into the minimal symbol table only. */ + continue; + + default: + break; + } + } + + /* If explicitly specified as a function, treat is as one. This check + evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur + after the above CSECT check. */ + if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) + { + bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, + 0, cs->c_naux, &main_aux); + goto function_entry_point; + } + + switch (cs->c_sclass) + { + + case C_FILE: + + /* c_value field contains symnum of next .file entry in table + or symnum of first global after last .file. */ + + next_file_symnum = cs->c_value; + + /* Complete symbol table for last object file containing + debugging information. */ + + /* Whether or not there was a csect in the previous file, we + have to call `end_stabs' and `start_stabs' to reset + type_vector, line_vector, etc. structures. */ + + complete_symtab (filestring, file_start_addr); + cur_src_end_addr = file_end_addr; + end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); + end_stabs (); + + /* XCOFF, according to the AIX 3.2 documentation, puts the filename + in cs->c_name. But xlc 1.3.0.2 has decided to do things the + standard COFF way and put it in the auxent. We use the auxent if + the symbol is ".file" and an auxent exists, otherwise use the symbol + itself. Simple enough. */ + if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0) + { + bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, + 0, cs->c_naux, &main_aux); + filestring = coff_getfilename (&main_aux, objfile); + } + else + filestring = cs->c_name; + + start_stabs (); + start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0); + record_debugformat (debugfmt); + last_csect_name = 0; + + /* reset file start and end addresses. A compilation unit with no text + (only data) should have zero file boundaries. */ + file_start_addr = file_end_addr = 0; + break; + + case C_FUN: + fcn_stab_saved = *cs; + break; + + case C_FCN: + if (DEPRECATED_STREQ (cs->c_name, ".bf")) + { + CORE_ADDR off = ANOFFSET (objfile->section_offsets, + SECT_OFF_TEXT (objfile)); + bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, + 0, cs->c_naux, &main_aux); + + within_function = 1; + + new = push_context (0, fcn_start_addr + off); + + new->name = define_symbol + (fcn_cs_saved.c_value + off, + fcn_stab_saved.c_name, 0, 0, objfile); + if (new->name != NULL) + SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile); + } + else if (DEPRECATED_STREQ (cs->c_name, ".ef")) + { + + bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, + 0, cs->c_naux, &main_aux); + + /* The value of .ef is the address of epilogue code; + not useful for gdb. */ + /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno + contains number of lines to '}' */ + + if (context_stack_depth <= 0) + { /* We attempted to pop an empty context stack */ + ef_complaint (cs->c_symnum); + within_function = 0; + break; + } + new = pop_context (); + /* Stack must be empty now. */ + if (context_stack_depth > 0 || new == NULL) + { + ef_complaint (cs->c_symnum); + within_function = 0; + break; + } + + finish_block (new->name, &local_symbols, new->old_blocks, + new->start_addr, + (fcn_cs_saved.c_value + + fcn_aux_saved.x_sym.x_misc.x_fsize + + ANOFFSET (objfile->section_offsets, + SECT_OFF_TEXT (objfile))), + objfile); + within_function = 0; + } + break; + + case C_BSTAT: + /* Begin static block. */ + { + struct internal_syment symbol; + + read_symbol (&symbol, cs->c_value); + static_block_base = symbol.n_value; + static_block_section = + secnum_to_section (symbol.n_scnum, objfile); + } + break; + + case C_ESTAT: + /* End of static block. */ + static_block_base = 0; + static_block_section = -1; + break; + + case C_ARG: + case C_REGPARM: + case C_REG: + case C_TPDEF: + case C_STRTAG: + case C_UNTAG: + case C_ENTAG: + { + complaint (&symfile_complaints, "Unrecognized storage class %d.", + cs->c_sclass); + } + break; + + case C_LABEL: + case C_NULL: + /* Ignore these. */ + break; + + case C_HIDEXT: + case C_STAT: + break; + + case C_BINCL: + /* beginning of include file */ + /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted + order. Thus, when wee see them, we might not know enough info + to process them. Thus, we'll be saving them into a table + (inclTable) and postpone their processing. */ + + record_include_begin (cs); + break; + + case C_EINCL: + /* End of include file. */ + /* See the comment after case C_BINCL. */ + record_include_end (cs); + break; + + case C_BLOCK: + if (DEPRECATED_STREQ (cs->c_name, ".bb")) + { + depth++; + new = push_context (depth, + (cs->c_value + + ANOFFSET (objfile->section_offsets, + SECT_OFF_TEXT (objfile)))); + } + else if (DEPRECATED_STREQ (cs->c_name, ".eb")) + { + if (context_stack_depth <= 0) + { /* We attempted to pop an empty context stack */ + eb_complaint (cs->c_symnum); + break; + } + new = pop_context (); + if (depth-- != new->depth) + { + eb_complaint (cs->c_symnum); + break; + } + if (local_symbols && context_stack_depth > 0) + { + /* Make a block for the local symbols within. */ + finish_block (new->name, &local_symbols, new->old_blocks, + new->start_addr, + (cs->c_value + + ANOFFSET (objfile->section_offsets, + SECT_OFF_TEXT (objfile))), + objfile); + } + local_symbols = new->locals; + } + break; + + default: + process_xcoff_symbol (cs, objfile); + break; + } + } + + if (last_source_file) + { + struct symtab *s; + + complete_symtab (filestring, file_start_addr); + cur_src_end_addr = file_end_addr; + s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); + /* When reading symbols for the last C_FILE of the objfile, try + to make sure that we set pst->symtab to the symtab for the + file, not to the _globals_ symtab. I'm not sure whether this + actually works right or when/if it comes up. */ + if (pst->symtab == NULL) + pst->symtab = s; + end_stabs (); + } +} + +#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ + (SYMBOL2) = (struct symbol *) \ + obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \ + *(SYMBOL2) = *(SYMBOL1); + + +#define SYMNAME_ALLOC(NAME, ALLOCED) \ + (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack); + + +static struct type *func_symbol_type; +static struct type *var_symbol_type; + +/* process one xcoff symbol. */ + +static struct symbol * +process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile) +{ + struct symbol onesymbol; + struct symbol *sym = &onesymbol; + struct symbol *sym2 = NULL; + char *name, *pp; + + int sec; + CORE_ADDR off; + + if (cs->c_secnum < 0) + { + /* The value is a register number, offset within a frame, etc., + and does not get relocated. */ + off = 0; + sec = -1; + } + else + { + sec = secnum_to_section (cs->c_secnum, objfile); + off = ANOFFSET (objfile->section_offsets, sec); + } + + name = cs->c_name; + if (name[0] == '.') + ++name; + + memset (sym, '\0', sizeof (struct symbol)); + + /* default assumptions */ + SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off; + SYMBOL_DOMAIN (sym) = VAR_DOMAIN; + SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile); + + if (ISFCN (cs->c_type)) + { + /* At this point, we don't know the type of the function. This + will be patched with the type from its stab entry later on in + patch_block_stabs (), unless the file was compiled without -g. */ + + DEPRECATED_SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); + SYMBOL_TYPE (sym) = func_symbol_type; + + SYMBOL_CLASS (sym) = LOC_BLOCK; + SYMBOL_DUP (sym, sym2); + + if (cs->c_sclass == C_EXT) + add_symbol_to_list (sym2, &global_symbols); + else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) + add_symbol_to_list (sym2, &file_symbols); + } + else + { + /* In case we can't figure out the type, provide default. */ + SYMBOL_TYPE (sym) = var_symbol_type; + + switch (cs->c_sclass) + { +#if 0 + /* The values of functions and global symbols are now resolved + via the global_sym_chain in stabsread.c. */ + case C_FUN: + if (fcn_cs_saved.c_sclass == C_EXT) + add_stab_to_list (name, &global_stabs); + else + add_stab_to_list (name, &file_stabs); + break; + + case C_GSYM: + add_stab_to_list (name, &global_stabs); + break; +#endif + + case C_BCOMM: + common_block_start (cs->c_name, objfile); + break; + + case C_ECOMM: + common_block_end (objfile); + break; + + default: + complaint (&symfile_complaints, "Unexpected storage class: %d", + cs->c_sclass); + /* FALLTHROUGH */ + + case C_DECL: + case C_PSYM: + case C_RPSYM: + case C_ECOML: + case C_LSYM: + case C_RSYM: + case C_GSYM: + + { + sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile); + if (sym != NULL) + { + SYMBOL_SECTION (sym) = sec; + } + return sym; + } + + case C_STSYM: + + /* For xlc (not GCC), the 'V' symbol descriptor is used for + all statics and we need to distinguish file-scope versus + function-scope using within_function. We do this by + changing the string we pass to define_symbol to use 'S' + where we need to, which is not necessarily super-clean, + but seems workable enough. */ + + if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) + return NULL; + + ++pp; + if (*pp == 'V' && !within_function) + *pp = 'S'; + sym = define_symbol ((cs->c_value + + ANOFFSET (objfile->section_offsets, + static_block_section)), + cs->c_name, 0, 0, objfile); + if (sym != NULL) + { + SYMBOL_VALUE_ADDRESS (sym) += static_block_base; + SYMBOL_SECTION (sym) = static_block_section; + } + return sym; + + } + } + return sym2; +} + +/* Extract the file name from the aux entry of a C_FILE symbol. + Result is in static storage and is only good for temporary use. */ + +static char * +coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile) +{ + static char buffer[BUFSIZ]; + + if (aux_entry->x_file.x_n.x_zeroes == 0) + strcpy (buffer, + ((struct coff_symfile_info *) objfile->sym_private)->strtbl + + aux_entry->x_file.x_n.x_offset); + else + { + strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); + buffer[FILNMLEN] = '\0'; + } + return (buffer); +} + +/* Set *SYMBOL to symbol number symno in symtbl. */ +static void +read_symbol (struct internal_syment *symbol, int symno) +{ + int nsyms = + ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) + ->symtbl_num_syms; + char *stbl = + ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) + ->symtbl; + if (symno < 0 || symno >= nsyms) + { + complaint (&symfile_complaints, "Invalid symbol offset"); + symbol->n_value = 0; + symbol->n_scnum = -1; + return; + } + bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd, + stbl + (symno * local_symesz), + symbol); +} + +/* Get value corresponding to symbol number symno in symtbl. */ + +static CORE_ADDR +read_symbol_nvalue (int symno) +{ + struct internal_syment symbol[1]; + + read_symbol (symbol, symno); + return symbol->n_value; +} + + +/* Find the address of the function corresponding to symno, where + symno is the symbol pointed to by the linetable. */ + +static int +read_symbol_lineno (int symno) +{ + struct objfile *objfile = this_symtab_psymtab->objfile; + int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd); + + struct coff_symfile_info *info = + (struct coff_symfile_info *)objfile->sym_private; + int nsyms = info->symtbl_num_syms; + char *stbl = info->symtbl; + char *strtbl = info->strtbl; + + struct internal_syment symbol[1]; + union internal_auxent main_aux[1]; + + if (symno < 0) + { + bf_notfound_complaint (); + return 0; + } + + /* Note that just searching for a short distance (e.g. 50 symbols) + is not enough, at least in the following case. + + .extern foo + [many .stabx entries] + [a few functions, referring to foo] + .globl foo + .bf + + What happens here is that the assembler moves the .stabx entries + to right before the ".bf" for foo, but the symbol for "foo" is before + all the stabx entries. See PR gdb/2222. */ + + /* Maintaining a table of .bf entries might be preferable to this search. + If I understand things correctly it would need to be done only for + the duration of a single psymtab to symtab conversion. */ + while (symno < nsyms) + { + bfd_coff_swap_sym_in (symfile_bfd, + stbl + (symno * local_symesz), symbol); + if (symbol->n_sclass == C_FCN) + { + char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name; + if (DEPRECATED_STREQ (name, ".bf")) + goto gotit; + } + symno += symbol->n_numaux + 1; + } + + bf_notfound_complaint (); + return 0; + +gotit: + /* take aux entry and return its lineno */ + symno++; + bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz, + symbol->n_type, symbol->n_sclass, + 0, symbol->n_numaux, main_aux); + + return main_aux->x_sym.x_misc.x_lnsz.x_lnno; +} + +/* Support for line number handling */ + +/* This function is called for every section; it finds the outer limits + * of the line table (minimum and maximum file offset) so that the + * mainline code can read the whole thing for efficiency. + */ +static void +find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo) +{ + struct coff_symfile_info *info; + int size, count; + file_ptr offset, maxoff; + + count = asect->lineno_count; + + if (!DEPRECATED_STREQ (asect->name, ".text") || count == 0) + return; + + size = count * coff_data (abfd)->local_linesz; + info = (struct coff_symfile_info *) vpinfo; + offset = asect->line_filepos; + maxoff = offset + size; + + if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) + info->min_lineno_offset = offset; + + if (maxoff > info->max_lineno_offset) + info->max_lineno_offset = maxoff; +} + +static void xcoff_psymtab_to_symtab_1 (struct partial_symtab *); + +static void +xcoff_psymtab_to_symtab_1 (struct partial_symtab *pst) +{ + struct cleanup *old_chain; + int i; + + if (!pst) + return; + + if (pst->readin) + { + fprintf_unfiltered + (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", + pst->filename); + return; + } + + /* Read in all partial symtabs on which this one is dependent */ + for (i = 0; i < pst->number_of_dependencies; i++) + if (!pst->dependencies[i]->readin) + { + /* Inform about additional files that need to be read in. */ + if (info_verbose) + { + fputs_filtered (" ", gdb_stdout); + wrap_here (""); + fputs_filtered ("and ", gdb_stdout); + wrap_here (""); + printf_filtered ("%s...", pst->dependencies[i]->filename); + wrap_here (""); /* Flush output */ + gdb_flush (gdb_stdout); + } + xcoff_psymtab_to_symtab_1 (pst->dependencies[i]); + } + + if (((struct symloc *) pst->read_symtab_private)->numsyms != 0) + { + /* Init stuff necessary for reading in symbols. */ + stabsread_init (); + buildsym_init (); + old_chain = make_cleanup (really_free_pendings, 0); + + read_xcoff_symtab (pst); + + do_cleanups (old_chain); + } + + pst->readin = 1; +} + +static void xcoff_psymtab_to_symtab (struct partial_symtab *); + +/* Read in all of the symbols for a given psymtab for real. + Be verbose about it if the user wants that. */ + +static void +xcoff_psymtab_to_symtab (struct partial_symtab *pst) +{ + bfd *sym_bfd; + + if (!pst) + return; + + if (pst->readin) + { + fprintf_unfiltered + (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", + pst->filename); + return; + } + + if (((struct symloc *) pst->read_symtab_private)->numsyms != 0 + || pst->number_of_dependencies) + { + /* Print the message now, before reading the string table, + to avoid disconcerting pauses. */ + if (info_verbose) + { + printf_filtered ("Reading in symbols for %s...", pst->filename); + gdb_flush (gdb_stdout); + } + + sym_bfd = pst->objfile->obfd; + + next_symbol_text_func = xcoff_next_symbol_text; + + xcoff_psymtab_to_symtab_1 (pst); + + /* Match with global symbols. This only needs to be done once, + after all of the symtabs and dependencies have been read in. */ + scan_file_globals (pst->objfile); + + /* Finish up the debug error message. */ + if (info_verbose) + printf_filtered ("done.\n"); + } +} + +static void +xcoff_new_init (struct objfile *objfile) +{ + stabsread_new_init (); + buildsym_new_init (); +} + +/* Do initialization in preparation for reading symbols from OBJFILE. + + We will only be called if this is an XCOFF or XCOFF-like file. + BFD handles figuring out the format of the file, and code in symfile.c + uses BFD's determination to vector to us. */ + +static void +xcoff_symfile_init (struct objfile *objfile) +{ + /* Allocate struct to keep track of the symfile */ + objfile->sym_private = xmmalloc (objfile->md, + sizeof (struct coff_symfile_info)); + + /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we + find this causes a significant slowdown in gdb then we could + set it in the debug symbol readers only when necessary. */ + objfile->flags |= OBJF_REORDERED; + + init_entry_point_info (objfile); +} + +/* Perform any local cleanups required when we are done with a particular + objfile. I.E, we are in the process of discarding all symbol information + for an objfile, freeing up all memory held for it, and unlinking the + objfile struct from the global list of known objfiles. */ + +static void +xcoff_symfile_finish (struct objfile *objfile) +{ + if (objfile->sym_private != NULL) + { + xmfree (objfile->md, objfile->sym_private); + } + + /* Start with a fresh include table for the next objfile. */ + if (inclTable) + { + xfree (inclTable); + inclTable = NULL; + } + inclIndx = inclLength = inclDepth = 0; +} + + +static void +init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile) +{ + long length; + int val; + unsigned char lengthbuf[4]; + char *strtbl; + + ((struct coff_symfile_info *) objfile->sym_private)->strtbl = NULL; + + if (bfd_seek (abfd, offset, SEEK_SET) < 0) + error ("cannot seek to string table in %s: %s", + bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); + + val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); + length = bfd_h_get_32 (abfd, lengthbuf); + + /* If no string table is needed, then the file may end immediately + after the symbols. Just return with `strtbl' set to NULL. */ + + if (val != sizeof lengthbuf || length < sizeof lengthbuf) + return; + + /* Allocate string table from objfile_obstack. We will need this table + as long as we have its symbol table around. */ + + strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length); + ((struct coff_symfile_info *) objfile->sym_private)->strtbl = strtbl; + + /* Copy length buffer, the first byte is usually zero and is + used for stabs with a name length of zero. */ + memcpy (strtbl, lengthbuf, sizeof lengthbuf); + if (length == sizeof lengthbuf) + return; + + val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd); + + if (val != length - sizeof lengthbuf) + error ("cannot read string table from %s: %s", + bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); + if (strtbl[length - 1] != '\0') + error ("bad symbol file: string table does not end with null character"); + + return; +} + +/* If we have not yet seen a function for this psymtab, this is 0. If we + have seen one, it is the offset in the line numbers of the line numbers + for the psymtab. */ +static unsigned int first_fun_line_offset; + +static struct partial_symtab *xcoff_start_psymtab + (struct objfile *, char *, int, + struct partial_symbol **, struct partial_symbol **); + +/* Allocate and partially fill a partial symtab. It will be + completely filled at the end of the symbol list. + + SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR + is the address relative to which its symbols are (incremental) or 0 + (normal). */ + +static struct partial_symtab * +xcoff_start_psymtab (struct objfile *objfile, char *filename, int first_symnum, + struct partial_symbol **global_syms, + struct partial_symbol **static_syms) +{ + struct partial_symtab *result = + start_psymtab_common (objfile, objfile->section_offsets, + filename, + /* We fill in textlow later. */ + 0, + global_syms, static_syms); + + result->read_symtab_private = (char *) + obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc)); + ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum; + result->read_symtab = xcoff_psymtab_to_symtab; + + /* Deduce the source language from the filename for this psymtab. */ + psymtab_language = deduce_language_from_filename (filename); + + return result; +} + +static struct partial_symtab *xcoff_end_psymtab + (struct partial_symtab *, char **, int, int, + struct partial_symtab **, int, int); + +/* Close off the current usage of PST. + Returns PST, or NULL if the partial symtab was empty and thrown away. + + CAPPING_SYMBOL_NUMBER is the end of pst (exclusive). + + INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES + are the information for includes and dependencies. */ + +static struct partial_symtab * +xcoff_end_psymtab (struct partial_symtab *pst, char **include_list, + int num_includes, int capping_symbol_number, + struct partial_symtab **dependency_list, + int number_dependencies, int textlow_not_set) +{ + int i; + struct objfile *objfile = pst->objfile; + + if (capping_symbol_number != -1) + ((struct symloc *) pst->read_symtab_private)->numsyms = + capping_symbol_number + - ((struct symloc *) pst->read_symtab_private)->first_symnum; + ((struct symloc *) pst->read_symtab_private)->lineno_off = + first_fun_line_offset; + first_fun_line_offset = 0; + pst->n_global_syms = + objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); + pst->n_static_syms = + objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); + + pst->number_of_dependencies = number_dependencies; + if (number_dependencies) + { + pst->dependencies = (struct partial_symtab **) + obstack_alloc (&objfile->objfile_obstack, + number_dependencies * sizeof (struct partial_symtab *)); + memcpy (pst->dependencies, dependency_list, + number_dependencies * sizeof (struct partial_symtab *)); + } + else + pst->dependencies = 0; + + for (i = 0; i < num_includes; i++) + { + struct partial_symtab *subpst = + allocate_psymtab (include_list[i], objfile); + + subpst->section_offsets = pst->section_offsets; + subpst->read_symtab_private = + (char *) obstack_alloc (&objfile->objfile_obstack, + sizeof (struct symloc)); + ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0; + ((struct symloc *) subpst->read_symtab_private)->numsyms = 0; + subpst->textlow = 0; + subpst->texthigh = 0; + + /* We could save slight bits of space by only making one of these, + shared by the entire set of include files. FIXME-someday. */ + subpst->dependencies = (struct partial_symtab **) + obstack_alloc (&objfile->objfile_obstack, + sizeof (struct partial_symtab *)); + subpst->dependencies[0] = pst; + subpst->number_of_dependencies = 1; + + subpst->globals_offset = + subpst->n_global_syms = + subpst->statics_offset = + subpst->n_static_syms = 0; + + subpst->readin = 0; + subpst->symtab = 0; + subpst->read_symtab = pst->read_symtab; + } + + sort_pst_symbols (pst); + + /* If there is already a psymtab or symtab for a file of this name, + remove it. (If there is a symtab, more drastic things also + happen.) This happens in VxWorks. */ + free_named_symtabs (pst->filename); + + if (num_includes == 0 + && number_dependencies == 0 + && pst->n_global_syms == 0 + && pst->n_static_syms == 0) + { + /* Throw away this psymtab, it's empty. We can't deallocate it, since + it is on the obstack, but we can forget to chain it on the list. */ + /* Empty psymtabs happen as a result of header files which don't have + any symbols in them. There can be a lot of them. */ + + discard_psymtab (pst); + + /* Indicate that psymtab was thrown away. */ + pst = (struct partial_symtab *) NULL; + } + return pst; +} + +static void swap_sym (struct internal_syment *, + union internal_auxent *, char **, char **, + unsigned int *, struct objfile *); + +/* Swap raw symbol at *RAW and put the name in *NAME, the symbol in + *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over + the symbol and its auxents. */ + +static void +swap_sym (struct internal_syment *symbol, union internal_auxent *aux, + char **name, char **raw, unsigned int *symnump, + struct objfile *objfile) +{ + bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol); + if (symbol->n_zeroes) + { + /* If it's exactly E_SYMNMLEN characters long it isn't + '\0'-terminated. */ + if (symbol->n_name[E_SYMNMLEN - 1] != '\0') + { + /* FIXME: wastes memory for symbols which we don't end up putting + into the minimal symbols. */ + char *p; + p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1); + strncpy (p, symbol->n_name, E_SYMNMLEN); + p[E_SYMNMLEN] = '\0'; + *name = p; + } + else + /* Point to the unswapped name as that persists as long as the + objfile does. */ + *name = ((struct external_syment *) *raw)->e.e_name; + } + else if (symbol->n_sclass & 0x80) + { + *name = ((struct coff_symfile_info *) objfile->sym_private)->debugsec + + symbol->n_offset; + } + else + { + *name = ((struct coff_symfile_info *) objfile->sym_private)->strtbl + + symbol->n_offset; + } + ++*symnump; + *raw += coff_data (objfile->obfd)->local_symesz; + if (symbol->n_numaux > 0) + { + bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type, + symbol->n_sclass, 0, symbol->n_numaux, aux); + + *symnump += symbol->n_numaux; + *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux; + } +} + +static void +function_outside_compilation_unit_complaint (const char *arg1) +{ + complaint (&symfile_complaints, + "function `%s' appears to be defined outside of all compilation units", + arg1); +} + +static void +scan_xcoff_symtab (struct objfile *objfile) +{ + CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ + char *filestring = NULL; + + char *namestring; + int past_first_source_file = 0; + bfd *abfd; + asection *bfd_sect; + unsigned int nsyms; + + /* Current partial symtab */ + struct partial_symtab *pst; + + /* List of current psymtab's include files */ + char **psymtab_include_list; + int includes_allocated; + int includes_used; + + /* Index within current psymtab dependency list */ + struct partial_symtab **dependency_list; + int dependencies_used, dependencies_allocated; + + char *sraw_symbol; + struct internal_syment symbol; + union internal_auxent main_aux[5]; + unsigned int ssymnum; + + char *last_csect_name = NULL; /* last seen csect's name and value */ + CORE_ADDR last_csect_val = 0; + int last_csect_sec = 0; + int misc_func_recorded = 0; /* true if any misc. function */ + int textlow_not_set = 1; + + pst = (struct partial_symtab *) 0; + + includes_allocated = 30; + includes_used = 0; + psymtab_include_list = (char **) alloca (includes_allocated * + sizeof (char *)); + + dependencies_allocated = 30; + dependencies_used = 0; + dependency_list = + (struct partial_symtab **) alloca (dependencies_allocated * + sizeof (struct partial_symtab *)); + + last_source_file = NULL; + + abfd = objfile->obfd; + + sraw_symbol = ((struct coff_symfile_info *) objfile->sym_private)->symtbl; + nsyms = ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms; + ssymnum = 0; + while (ssymnum < nsyms) + { + int sclass; + + QUIT; + + bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol); + sclass = symbol.n_sclass; + + switch (sclass) + { + case C_EXT: + case C_HIDEXT: + { + /* The CSECT auxent--always the last auxent. */ + union internal_auxent csect_aux; + unsigned int symnum_before = ssymnum; + + swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, + &ssymnum, objfile); + if (symbol.n_numaux > 1) + { + bfd_coff_swap_aux_in + (objfile->obfd, + sraw_symbol - coff_data (abfd)->local_symesz, + symbol.n_type, + symbol.n_sclass, + symbol.n_numaux - 1, + symbol.n_numaux, + &csect_aux); + } + else + csect_aux = main_aux[0]; + + /* If symbol name starts with ".$" or "$", ignore it. */ + if (namestring[0] == '$' + || (namestring[0] == '.' && namestring[1] == '$')) + break; + + switch (csect_aux.x_csect.x_smtyp & 0x7) + { + case XTY_SD: + switch (csect_aux.x_csect.x_smclas) + { + case XMC_PR: + if (last_csect_name) + { + /* If no misc. function recorded in the last + seen csect, enter it as a function. This + will take care of functions like strcmp() + compiled by xlc. */ + + if (!misc_func_recorded) + { + RECORD_MINIMAL_SYMBOL + (last_csect_name, last_csect_val, + mst_text, last_csect_sec, + objfile); + } + + if (pst != NULL) + { + /* We have to allocate one psymtab for + each program csect, because their text + sections need not be adjacent. */ + xcoff_end_psymtab + (pst, psymtab_include_list, includes_used, + symnum_before, dependency_list, + dependencies_used, textlow_not_set); + includes_used = 0; + dependencies_used = 0; + /* Give all psymtabs for this source file the same + name. */ + pst = xcoff_start_psymtab + (objfile, + filestring, + symnum_before, + objfile->global_psymbols.next, + objfile->static_psymbols.next); + } + } + /* Activate the misc_func_recorded mechanism for + compiler- and linker-generated CSECTs like ".strcmp" + and "@FIX1". */ + if (namestring && (namestring[0] == '.' + || namestring[0] == '@')) + { + last_csect_name = namestring; + last_csect_val = symbol.n_value; + last_csect_sec = + secnum_to_section (symbol.n_scnum, objfile); + } + if (pst != NULL) + { + CORE_ADDR highval = + symbol.n_value + csect_aux.x_csect.x_scnlen.l; + if (highval > pst->texthigh) + pst->texthigh = highval; + if (pst->textlow == 0 || symbol.n_value < pst->textlow) + pst->textlow = symbol.n_value; + } + misc_func_recorded = 0; + break; + + case XMC_RW: + case XMC_TD: + /* Data variables are recorded in the minimal symbol + table, except for section symbols. */ + if (*namestring != '.') + prim_record_minimal_symbol_and_info + (namestring, symbol.n_value, + sclass == C_HIDEXT ? mst_file_data : mst_data, + NULL, secnum_to_section (symbol.n_scnum, objfile), + NULL, objfile); + break; + + case XMC_TC0: + if (toc_offset) + warning ("More than one XMC_TC0 symbol found."); + toc_offset = symbol.n_value; + + /* Make TOC offset relative to start address of section. */ + bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile); + if (bfd_sect) + toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect); + break; + + case XMC_TC: + /* These symbols tell us where the TOC entry for a + variable is, not the variable itself. */ + break; + + default: + break; + } + break; + + case XTY_LD: + switch (csect_aux.x_csect.x_smclas) + { + case XMC_PR: + /* A function entry point. */ + + if (first_fun_line_offset == 0 && symbol.n_numaux > 1) + first_fun_line_offset = + main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr; + RECORD_MINIMAL_SYMBOL + (namestring, symbol.n_value, + sclass == C_HIDEXT ? mst_file_text : mst_text, + secnum_to_section (symbol.n_scnum, objfile), + objfile); + break; + + case XMC_GL: + /* shared library function trampoline code entry + point. */ + + /* record trampoline code entries as + mst_solib_trampoline symbol. When we lookup mst + symbols, we will choose mst_text over + mst_solib_trampoline. */ + RECORD_MINIMAL_SYMBOL + (namestring, symbol.n_value, + mst_solib_trampoline, + secnum_to_section (symbol.n_scnum, objfile), + objfile); + break; + + case XMC_DS: + /* The symbols often have the same names as + debug symbols for functions, and confuse + lookup_symbol. */ + break; + + default: + + /* xlc puts each variable in a separate csect, + so we get an XTY_SD for each variable. But + gcc puts several variables in a csect, so + that each variable only gets an XTY_LD. We + still need to record them. This will + typically be XMC_RW; I suspect XMC_RO and + XMC_BS might be possible too. */ + if (*namestring != '.') + prim_record_minimal_symbol_and_info + (namestring, symbol.n_value, + sclass == C_HIDEXT ? mst_file_data : mst_data, + NULL, secnum_to_section (symbol.n_scnum, objfile), + NULL, objfile); + break; + } + break; + + case XTY_CM: + switch (csect_aux.x_csect.x_smclas) + { + case XMC_RW: + case XMC_BS: + /* Common variables are recorded in the minimal symbol + table, except for section symbols. */ + if (*namestring != '.') + prim_record_minimal_symbol_and_info + (namestring, symbol.n_value, + sclass == C_HIDEXT ? mst_file_bss : mst_bss, + NULL, secnum_to_section (symbol.n_scnum, objfile), + NULL, objfile); + break; + } + break; + + default: + break; + } + } + break; + case C_FILE: + { + unsigned int symnum_before; + + symnum_before = ssymnum; + swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, + &ssymnum, objfile); + + /* See if the last csect needs to be recorded. */ + + if (last_csect_name && !misc_func_recorded) + { + + /* If no misc. function recorded in the last seen csect, enter + it as a function. This will take care of functions like + strcmp() compiled by xlc. */ + + RECORD_MINIMAL_SYMBOL + (last_csect_name, last_csect_val, + mst_text, last_csect_sec, objfile); + } + + if (pst) + { + xcoff_end_psymtab (pst, psymtab_include_list, includes_used, + symnum_before, dependency_list, + dependencies_used, textlow_not_set); + includes_used = 0; + dependencies_used = 0; + } + first_fun_line_offset = 0; + + /* XCOFF, according to the AIX 3.2 documentation, puts the + filename in cs->c_name. But xlc 1.3.0.2 has decided to + do things the standard COFF way and put it in the auxent. + We use the auxent if the symbol is ".file" and an auxent + exists, otherwise use the symbol itself. */ + if (!strcmp (namestring, ".file") && symbol.n_numaux > 0) + { + filestring = coff_getfilename (&main_aux[0], objfile); + } + else + filestring = namestring; + + pst = xcoff_start_psymtab (objfile, + filestring, + symnum_before, + objfile->global_psymbols.next, + objfile->static_psymbols.next); + last_csect_name = NULL; + } + break; + + default: + { + complaint (&symfile_complaints, + "Storage class %d not recognized during scan", sclass); + } + /* FALLTHROUGH */ + + /* C_FCN is .bf and .ef symbols. I think it is sufficient + to handle only the C_FUN and C_EXT. */ + case C_FCN: + + case C_BSTAT: + case C_ESTAT: + case C_ARG: + case C_REGPARM: + case C_REG: + case C_TPDEF: + case C_STRTAG: + case C_UNTAG: + case C_ENTAG: + case C_LABEL: + case C_NULL: + + /* C_EINCL means we are switching back to the main file. But there + is no reason to care; the only thing we want to know about + includes is the names of all the included (.h) files. */ + case C_EINCL: + + case C_BLOCK: + + /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be + used instead. */ + case C_STAT: + + /* I don't think the name of the common block (as opposed to the + variables within it) is something which is user visible + currently. */ + case C_BCOMM: + case C_ECOMM: + + case C_PSYM: + case C_RPSYM: + + /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL + so C_LSYM would appear to be only for locals. */ + case C_LSYM: + + case C_AUTO: + case C_RSYM: + { + /* We probably could save a few instructions by assuming that + C_LSYM, C_PSYM, etc., never have auxents. */ + int naux1 = symbol.n_numaux + 1; + ssymnum += naux1; + sraw_symbol += bfd_coff_symesz (abfd) * naux1; + } + break; + + case C_BINCL: + { + /* Mark down an include file in the current psymtab */ + enum language tmp_language; + swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, + &ssymnum, objfile); + + tmp_language = deduce_language_from_filename (namestring); + + /* Only change the psymtab's language if we've learned + something useful (eg. tmp_language is not language_unknown). + In addition, to match what start_subfile does, never change + from C++ to C. */ + if (tmp_language != language_unknown + && (tmp_language != language_c + || psymtab_language != language_cplus)) + psymtab_language = tmp_language; + + /* In C++, one may expect the same filename to come round many + times, when code is coming alternately from the main file + and from inline functions in other files. So I check to see + if this is a file we've seen before -- either the main + source file, or a previously included file. + + This seems to be a lot of time to be spending on N_SOL, but + things like "break c-exp.y:435" need to work (I + suppose the psymtab_include_list could be hashed or put + in a binary tree, if profiling shows this is a major hog). */ + if (pst && DEPRECATED_STREQ (namestring, pst->filename)) + continue; + { + int i; + for (i = 0; i < includes_used; i++) + if (DEPRECATED_STREQ (namestring, psymtab_include_list[i])) + { + i = -1; + break; + } + if (i == -1) + continue; + } + psymtab_include_list[includes_used++] = namestring; + if (includes_used >= includes_allocated) + { + char **orig = psymtab_include_list; + + psymtab_include_list = (char **) + alloca ((includes_allocated *= 2) * + sizeof (char *)); + memcpy (psymtab_include_list, orig, + includes_used * sizeof (char *)); + } + continue; + } + case C_FUN: + /* The value of the C_FUN is not the address of the function (it + appears to be the address before linking), but as long as it + is smaller than the actual address, then find_pc_partial_function + will use the minimal symbols instead. I hope. */ + + case C_GSYM: + case C_ECOML: + case C_DECL: + case C_STSYM: + { + char *p; + swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, + &ssymnum, objfile); + + p = (char *) strchr (namestring, ':'); + if (!p) + continue; /* Not a debugging symbol. */ + + /* Main processing section for debugging symbols which + the initial read through the symbol tables needs to worry + about. If we reach this point, the symbol which we are + considering is definitely one we are interested in. + p must also contain the (valid) index into the namestring + which indicates the debugging type symbol. */ + + switch (p[1]) + { + case 'S': + symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); +#ifdef STATIC_TRANSFORM_NAME + namestring = STATIC_TRANSFORM_NAME (namestring); +#endif + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_STATIC, + &objfile->static_psymbols, + 0, symbol.n_value, + psymtab_language, objfile); + continue; + + case 'G': + symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); + /* The addresses in these entries are reported to be + wrong. See the code that reads 'G's for symtabs. */ + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_STATIC, + &objfile->global_psymbols, + 0, symbol.n_value, + psymtab_language, objfile); + continue; + + case 'T': + /* When a 'T' entry is defining an anonymous enum, it + may have a name which is the empty string, or a + single space. Since they're not really defining a + symbol, those shouldn't go in the partial symbol + table. We do pick up the elements of such enums at + 'check_enum:', below. */ + if (p >= namestring + 2 + || (p == namestring + 1 + && namestring[0] != ' ')) + { + add_psymbol_to_list (namestring, p - namestring, + STRUCT_DOMAIN, LOC_TYPEDEF, + &objfile->static_psymbols, + symbol.n_value, 0, + psymtab_language, objfile); + if (p[2] == 't') + { + /* Also a typedef with the same name. */ + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_TYPEDEF, + &objfile->static_psymbols, + symbol.n_value, 0, + psymtab_language, objfile); + p += 1; + } + } + goto check_enum; + + case 't': + if (p != namestring) /* a name is there, not just :T... */ + { + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_TYPEDEF, + &objfile->static_psymbols, + symbol.n_value, 0, + psymtab_language, objfile); + } + check_enum: + /* If this is an enumerated type, we need to + add all the enum constants to the partial symbol + table. This does not cover enums without names, e.g. + "enum {a, b} c;" in C, but fortunately those are + rare. There is no way for GDB to find those from the + enum type without spending too much time on it. Thus + to solve this problem, the compiler needs to put out the + enum in a nameless type. GCC2 does this. */ + + /* We are looking for something of the form + <name> ":" ("t" | "T") [<number> "="] "e" + {<constant> ":" <value> ","} ";". */ + + /* Skip over the colon and the 't' or 'T'. */ + p += 2; + /* This type may be given a number. Also, numbers can come + in pairs like (0,26). Skip over it. */ + while ((*p >= '0' && *p <= '9') + || *p == '(' || *p == ',' || *p == ')' + || *p == '=') + p++; + + if (*p++ == 'e') + { + /* The aix4 compiler emits extra crud before the members. */ + if (*p == '-') + { + /* Skip over the type (?). */ + while (*p != ':') + p++; + + /* Skip over the colon. */ + p++; + } + + /* We have found an enumerated type. */ + /* According to comments in read_enum_type + a comma could end it instead of a semicolon. + I don't know where that happens. + Accept either. */ + while (*p && *p != ';' && *p != ',') + { + char *q; + + /* Check for and handle cretinous dbx symbol name + continuation! */ + if (*p == '\\' || (*p == '?' && p[1] == '\0')) + p = next_symbol_text (objfile); + + /* Point to the character after the name + of the enum constant. */ + for (q = p; *q && *q != ':'; q++) + ; + /* Note that the value doesn't matter for + enum constants in psymtabs, just in symtabs. */ + add_psymbol_to_list (p, q - p, + VAR_DOMAIN, LOC_CONST, + &objfile->static_psymbols, 0, + 0, psymtab_language, objfile); + /* Point past the name. */ + p = q; + /* Skip over the value. */ + while (*p && *p != ',') + p++; + /* Advance past the comma. */ + if (*p) + p++; + } + } + continue; + + case 'c': + /* Constant, e.g. from "const" in Pascal. */ + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_CONST, + &objfile->static_psymbols, symbol.n_value, + 0, psymtab_language, objfile); + continue; + + case 'f': + if (! pst) + { + int name_len = p - namestring; + char *name = xmalloc (name_len + 1); + memcpy (name, namestring, name_len); + name[name_len] = '\0'; + function_outside_compilation_unit_complaint (name); + xfree (name); + } + symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_BLOCK, + &objfile->static_psymbols, + 0, symbol.n_value, + psymtab_language, objfile); + continue; + + /* Global functions were ignored here, but now they + are put into the global psymtab like one would expect. + They're also in the minimal symbol table. */ + case 'F': + if (! pst) + { + int name_len = p - namestring; + char *name = xmalloc (name_len + 1); + memcpy (name, namestring, name_len); + name[name_len] = '\0'; + function_outside_compilation_unit_complaint (name); + xfree (name); + } + symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); + add_psymbol_to_list (namestring, p - namestring, + VAR_DOMAIN, LOC_BLOCK, + &objfile->global_psymbols, + 0, symbol.n_value, + psymtab_language, objfile); + continue; + + /* Two things show up here (hopefully); static symbols of + local scope (static used inside braces) or extensions + of structure symbols. We can ignore both. */ + case 'V': + case '(': + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case '-': + case '#': /* for symbol identification (used in live ranges) */ + continue; + + case ':': + /* It is a C++ nested symbol. We don't need to record it + (I don't think); if we try to look up foo::bar::baz, + then symbols for the symtab containing foo should get + read in, I think. */ + /* Someone says sun cc puts out symbols like + /foo/baz/maclib::/usr/local/bin/maclib, + which would get here with a symbol type of ':'. */ + continue; + + default: + /* Unexpected symbol descriptor. The second and subsequent stabs + of a continued stab can show up here. The question is + whether they ever can mimic a normal stab--it would be + nice if not, since we certainly don't want to spend the + time searching to the end of every string looking for + a backslash. */ + + complaint (&symfile_complaints, + "unknown symbol descriptor `%c'", p[1]); + + /* Ignore it; perhaps it is an extension that we don't + know about. */ + continue; + } + } + } + } + + if (pst) + { + xcoff_end_psymtab (pst, psymtab_include_list, includes_used, + ssymnum, dependency_list, + dependencies_used, textlow_not_set); + } + + /* Record the toc offset value of this symbol table into objfile structure. + If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain + this information would be file auxiliary header. */ + + ((struct coff_symfile_info *) objfile->sym_private)->toc_offset = toc_offset; +} + +/* Return the toc offset value for a given objfile. */ + +CORE_ADDR +get_toc_offset (struct objfile *objfile) +{ + if (objfile) + return ((struct coff_symfile_info *) objfile->sym_private)->toc_offset; + return 0; +} + +/* Scan and build partial symbols for a symbol file. + We have been initialized by a call to dbx_symfile_init, which + put all the relevant info into a "struct dbx_symfile_info", + hung off the objfile structure. + + SECTION_OFFSETS contains offsets relative to which the symbols in the + various sections are (depending where the sections were actually loaded). + MAINLINE is true if we are reading the main symbol + table (as opposed to a shared lib or dynamically loaded file). */ + +static void +xcoff_initial_scan (struct objfile *objfile, int mainline) +{ + bfd *abfd; + int val; + struct cleanup *back_to; + int num_symbols; /* # of symbols */ + file_ptr symtab_offset; /* symbol table and */ + file_ptr stringtab_offset; /* string table file offsets */ + struct coff_symfile_info *info; + char *name; + unsigned int size; + + info = (struct coff_symfile_info *) objfile->sym_private; + symfile_bfd = abfd = objfile->obfd; + name = objfile->name; + + num_symbols = bfd_get_symcount (abfd); /* # of symbols */ + symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ + stringtab_offset = symtab_offset + + num_symbols * coff_data (abfd)->local_symesz; + + info->min_lineno_offset = 0; + info->max_lineno_offset = 0; + bfd_map_over_sections (abfd, find_linenos, info); + + if (num_symbols > 0) + { + /* Read the string table. */ + init_stringtab (abfd, stringtab_offset, objfile); + + /* Read the .debug section, if present. */ + { + struct bfd_section *secp; + bfd_size_type length; + char *debugsec = NULL; + + secp = bfd_get_section_by_name (abfd, ".debug"); + if (secp) + { + length = bfd_section_size (abfd, secp); + if (length) + { + debugsec = + (char *) obstack_alloc (&objfile->objfile_obstack, length); + + if (!bfd_get_section_contents (abfd, secp, debugsec, + (file_ptr) 0, length)) + { + error ("Error reading .debug section of `%s': %s", + name, bfd_errmsg (bfd_get_error ())); + } + } + } + ((struct coff_symfile_info *) objfile->sym_private)->debugsec = + debugsec; + } + } + + /* Read the symbols. We keep them in core because we will want to + access them randomly in read_symbol*. */ + val = bfd_seek (abfd, symtab_offset, SEEK_SET); + if (val < 0) + error ("Error reading symbols from %s: %s", + name, bfd_errmsg (bfd_get_error ())); + size = coff_data (abfd)->local_symesz * num_symbols; + ((struct coff_symfile_info *) objfile->sym_private)->symtbl = + obstack_alloc (&objfile->objfile_obstack, size); + ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms = + num_symbols; + + val = bfd_bread (((struct coff_symfile_info *) objfile->sym_private)->symtbl, + size, abfd); + if (val != size) + perror_with_name ("reading symbol table"); + + /* If we are reinitializing, or if we have never loaded syms yet, init */ + if (mainline + || (objfile->global_psymbols.size == 0 + && objfile->static_psymbols.size == 0)) + /* I'm not sure how how good num_symbols is; the rule of thumb in + init_psymbol_list was developed for a.out. On the one hand, + num_symbols includes auxents. On the other hand, it doesn't + include N_SLINE. */ + init_psymbol_list (objfile, num_symbols); + + free_pending_blocks (); + back_to = make_cleanup (really_free_pendings, 0); + + init_minimal_symbol_collection (); + make_cleanup_discard_minimal_symbols (); + + /* Now that the symbol table data of the executable file are all in core, + process them and define symbols accordingly. */ + + scan_xcoff_symtab (objfile); + + /* Install any minimal symbols that have been collected as the current + minimal symbols for this objfile. */ + + install_minimal_symbols (objfile); + + do_cleanups (back_to); +} + +static void +xcoff_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) +{ + asection *sect = NULL; + int i; + + objfile->num_sections = bfd_count_sections (objfile->obfd); + objfile->section_offsets = (struct section_offsets *) + obstack_alloc (&objfile->objfile_obstack, + SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); + + /* Initialize the section indexes for future use. */ + sect = bfd_get_section_by_name (objfile->obfd, ".text"); + if (sect) + objfile->sect_index_text = sect->index; + + sect = bfd_get_section_by_name (objfile->obfd, ".data"); + if (sect) + objfile->sect_index_data = sect->index; + + sect = bfd_get_section_by_name (objfile->obfd, ".bss"); + if (sect) + objfile->sect_index_bss = sect->index; + + sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); + if (sect) + objfile->sect_index_rodata = sect->index; + + for (i = 0; i < objfile->num_sections; ++i) + { + /* syms_from_objfile kindly subtracts from addr the + bfd_section_vma of the .text section. This strikes me as + wrong--whether the offset to be applied to symbol reading is + relative to the start address of the section depends on the + symbol format. In any event, this whole "addr" concept is + pretty broken (it doesn't handle any section but .text + sensibly), so just ignore the addr parameter and use 0. + rs6000-nat.c will set the correct section offsets via + objfile_relocate. */ + (objfile->section_offsets)->offsets[i] = 0; + } +} + +/* Register our ability to parse symbols for xcoff BFD files. */ + +static struct sym_fns xcoff_sym_fns = +{ + + /* It is possible that coff and xcoff should be merged as + they do have fundamental similarities (for example, the extra storage + classes used for stabs could presumably be recognized in any COFF file). + However, in addition to obvious things like all the csect hair, there are + some subtler differences between xcoffread.c and coffread.c, notably + the fact that coffread.c has no need to read in all the symbols, but + xcoffread.c reads all the symbols and does in fact randomly access them + (in C_BSTAT and line number processing). */ + + bfd_target_xcoff_flavour, + + xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ + xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ + xcoff_initial_scan, /* sym_read: read a symbol file into symtab */ + xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ + xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ + NULL /* next: pointer to next struct sym_fns */ +}; + +void +_initialize_xcoffread (void) +{ + add_symtab_fns (&xcoff_sym_fns); + + func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0, + "<function, no debug info>", NULL); + TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int; + var_symbol_type = + init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0, + "<variable, no debug info>", NULL); +} |
