From: Jim Kingdon Date: Sat, 30 Oct 1993 20:21:19 +0000 (+0000) Subject: * symfile.c (reread_symbols): When re-reading symbols, do all the X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4d57c5995e45877128cd62ccfa4317ed452652fe;p=binutils-gdb.git * symfile.c (reread_symbols): When re-reading symbols, do all the right operations ourself, rather than calling symbol_file_command. If we re-read something, call clear_symtab_users not just breakpoint_re_set. * objfiles.h, objfiles.c (build_objfile_section_table): No longer static. * symfile.c (clear_symtab_users): Call clear_pc_function_cache. * coffread.c, dbxread.c, elfread.c, mipsread.c, nlmread.c, paread.c (*_symfile_offsets): Set objfile->num_sections. * remote.c (remote_wait), symfile.c (syms_from_objfile): Don't muck with objfile->num_sections now that all the symbol readers set it. * elfread.c: Clean up obsolete comment about handling only DWARF. * paread.c: Remove comment about how we should use an "ordinary" file format with an hppa suffix. There is nothing ordinary about SOM. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 1788c7f959f..11a21e1327a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,25 @@ +Sat Oct 30 08:32:53 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + + * symfile.c (reread_symbols): When re-reading symbols, do all the + right operations ourself, rather than calling symbol_file_command. + If we re-read something, call clear_symtab_users not just + breakpoint_re_set. + * objfiles.h, objfiles.c (build_objfile_section_table): No longer + static. + * symfile.c (clear_symtab_users): Call clear_pc_function_cache. + * coffread.c, dbxread.c, elfread.c, mipsread.c, nlmread.c, paread.c + (*_symfile_offsets): Set objfile->num_sections. + * remote.c (remote_wait), symfile.c (syms_from_objfile): + Don't muck with objfile->num_sections now that all the symbol + readers set it. + * elfread.c: Clean up obsolete comment about handling only DWARF. + * paread.c: Remove comment about how we should use an "ordinary" + file format with an hppa suffix. There is nothing ordinary about SOM. + + * config/i386/{i386m3.mh,i386mk.mh}, config/mips/mipsm3.mh, + config/ns32k/ns32km3.mh: Change MMALLOC_LIB to MMALLOC. + * TODO: Update Mach stuff. + Fri Oct 29 16:30:36 1993 Stan Shebs (shebs@rtl.cygnus.com) LynxOS support: diff --git a/gdb/coffread.c b/gdb/coffread.c index 48b3ca5b6be..102d752fcd9 100644 --- a/gdb/coffread.c +++ b/gdb/coffread.c @@ -28,6 +28,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "objfiles.h" #include "buildsym.h" #include "gdb-stabs.h" +#include "stabsread.h" #include "complaints.h" #include @@ -2044,11 +2045,12 @@ coff_symfile_offsets (objfile, addr) { struct section_offsets *section_offsets; int i; - + + objfile->num_sections = SECT_OFF_MAX; section_offsets = (struct section_offsets *) obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct section_offsets) + - sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); + sizeof (struct section_offsets) + + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); for (i = 0; i < SECT_OFF_MAX; i++) ANOFFSET (section_offsets, i) = addr; diff --git a/gdb/dbxread.c b/gdb/dbxread.c index 9d1a423607f..d423eec5e6e 100644 --- a/gdb/dbxread.c +++ b/gdb/dbxread.c @@ -212,9 +212,6 @@ free_header_files PARAMS ((void)); static void init_header_files PARAMS ((void)); -static struct pending * -copy_pending PARAMS ((struct pending *, int, struct pending *)); - static void read_ofile_symtab PARAMS ((struct partial_symtab *)); @@ -1547,7 +1544,7 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile) /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source file. Used to detect the SunPRO solaris compiler. */ - int n_opt_found; + static int n_opt_found; /* The stab type used for the definition of the last function. N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ @@ -1763,52 +1760,12 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile) break; case N_BCOMM: - if (common_block) - { - /* Note: this does not detect nesting if the previous N_BCOMM - was at the beginning of a scope (and thus common_block was - NULL). Not necessarily worth worrying about unless we run - into a compiler which actually has this bug. */ - static struct complaint msg = { - "Invalid symbol data: common within common at symtab pos %d", - 0, 0}; - complain (&msg, symnum); - } - common_block = local_symbols; - common_block_i = local_symbols ? local_symbols->nsyms : 0; + common_block_start (name, objfile); break; case N_ECOMM: - - /* Symbols declared since the BCOMM are to have the common block - start address added in when we know it. common_block and - common_block_i point to the first symbol after the BCOMM in - the local_symbols list; copy the list and hang it off the - symbol for the common block name for later fixup. */ - - /* If there is a N_ECOMM unmatched by a N_BCOMM, we treat all - the local_symbols as part of the common block. It might be - better to just ignore the N_ECOMM, but then we'd need to - distinguish between a N_BCOMM at the start of a scope, or no - N_BCOMM at all (currently they both have common_block NULL). - Not necessarily worth worrying about unless we run into a - compiler which actually has this bug. */ - - { - int i; - struct symbol *sym = - (struct symbol *) xmmalloc (objfile -> md, sizeof (struct symbol)); - memset (sym, 0, sizeof *sym); - SYMBOL_NAME (sym) = savestring (name, strlen (name)); - SYMBOL_CLASS (sym) = LOC_BLOCK; - SYMBOL_NAMESPACE (sym) = (enum namespace)((long) - copy_pending (local_symbols, common_block_i, common_block)); - i = hashname (SYMBOL_NAME (sym)); - SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; - global_sym_chain[i] = sym; - common_block = 0; - break; - } + common_block_end (objfile); + break; /* The following symbol types need to have the appropriate offset added to their value; then we process symbol definitions in the name. */ @@ -1816,28 +1773,23 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile) case N_STSYM: /* Static symbol in data seg */ case N_LCSYM: /* Static symbol in BSS seg */ case N_ROSYM: /* Static symbol in Read-only data seg */ - /* HORRID HACK DEPT. However, it's Sun's furgin' fault. FIXME. - Solaris2's stabs-in-coff makes *most* symbols relative - but leaves a few absolute. N_STSYM and friends sit on the fence. + /* HORRID HACK DEPT. However, it's Sun's furgin' fault. + Solaris2's stabs-in-elf makes *most* symbols relative + but leaves a few absolute (at least for Solaris 2.1 and version + 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence. .stab "foo:S...",N_STSYM is absolute (ld relocates it) .stab "foo:V...",N_STSYM is relative (section base subtracted). This leaves us no choice but to search for the 'S' or 'V'... (or pass the whole section_offsets stuff down ONE MORE function - call level, which we really don't want to do). - - The above is indeed true for Solaris 2.1. I'm not sure what - happens in Solaris 2.3, in which ld stops relocating stabs. */ + call level, which we really don't want to do). */ { char *p; p = strchr (name, ':'); if (p != 0 && p[1] == 'S') { - /* FIXME! We relocate it by the TEXT offset, in case the - whole module moved in memory. But this is wrong, since - the sections can side around independently. (I suspect that - the text offset is always zero anyway--elfread.c doesn't - process (and Sun cc doesn't produce) Ttext.text symbols). */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); + /* The linker relocated it. There used to be a kludge here + to add the text offset, but that will break if we ever + start using the text offset (currently it is always zero). */ goto define_a_symbol; } /* Since it's not the kludge case, re-dispatch to the right handler. */ @@ -2026,36 +1978,6 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile) previous_stab_code = type; } -/* Copy a pending list, used to record the contents of a common - block for later fixup. We copy the symbols starting with all - symbols in BEG, and ending with the symbols which are in - END at index ENDI. */ -static struct pending * -copy_pending (beg, endi, end) - struct pending *beg; - int endi; - struct pending *end; -{ - struct pending *new = 0; - struct pending *next; - int j; - - /* Copy all the struct pendings before end. */ - for (next = beg; next != NULL && next != end; next = next->next) - { - for (j = 0; j < next->nsyms; j++) - add_symbol_to_list (next->symbol[j], &new); - } - - /* Copy however much of END we need. If END is NULL, it means copy - all the local symbols (which we already did above). */ - if (end != NULL) - for (j = endi; j < end->nsyms; j++) - add_symbol_to_list (end->symbol[j], &new); - - return new; -} - /* FIXME: The only difference between this and elfstab_build_psymtabs is the call to install_minimal_symbols for elf. If the differences are really that small, the code should be shared. */ @@ -2253,11 +2175,12 @@ dbx_symfile_offsets (objfile, addr) { struct section_offsets *section_offsets; int i; - + + objfile->num_sections = SECT_OFF_MAX; section_offsets = (struct section_offsets *) obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct section_offsets) + - sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); + sizeof (struct section_offsets) + + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); for (i = 0; i < SECT_OFF_MAX; i++) ANOFFSET (section_offsets, i) = addr; diff --git a/gdb/elfread.c b/gdb/elfread.c index 230afecefb2..bbf4655fd26 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -615,15 +615,16 @@ elf_symfile_offsets (objfile, addr) { struct section_offsets *section_offsets; int i; - + + objfile->num_sections = SECT_OFF_MAX; section_offsets = (struct section_offsets *) obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct section_offsets) + - sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); + sizeof (struct section_offsets) + + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); for (i = 0; i < SECT_OFF_MAX; i++) ANOFFSET (section_offsets, i) = addr; - + return section_offsets; } @@ -694,21 +695,7 @@ elfstab_offset_sections (objfile, pst) complain (&stab_info_mismatch_complaint, filename); } -/* Register that we are able to handle ELF object file formats and DWARF - debugging formats. - - Unlike other object file formats, where the debugging information format - is implied by the object file format, the ELF object file format and the - DWARF debugging information format are two distinct, and potentially - separate entities. I.E. it is perfectly possible to have ELF objects - with debugging formats other than DWARF. And it is conceivable that the - DWARF debugging format might be used with another object file format, - like COFF, by simply using COFF's custom section feature. - - GDB, and to a lesser extent BFD, should support the notion of separate - object file formats and debugging information formats. For now, we just - use "elf" in the same sense as "a.out" or "coff", to imply both the ELF - object file format and the DWARF debugging format. */ +/* Register that we are able to handle ELF object file formats. */ static struct sym_fns elf_sym_fns = { diff --git a/gdb/mipsread.c b/gdb/mipsread.c index f7087a6f8ec..eb19789c67b 100644 --- a/gdb/mipsread.c +++ b/gdb/mipsread.c @@ -183,9 +183,6 @@ struct complaint unknown_type_qual_complaint = struct complaint array_index_type_complaint = {"illegal array index type for %s, assuming int", 0, 0}; -struct complaint array_bitsize_complaint = -{"size of array target type for %s not known, assuming %d bits", 0, 0}; - struct complaint bad_tag_guess_complaint = {"guessed tag type of %s incorrectly", 0, 0}; @@ -590,7 +587,15 @@ static struct parse_stack struct parse_stack *next, *prev; struct symtab *cur_st; /* Current symtab. */ struct block *cur_block; /* Block in it. */ - int blocktype; /* What are we parsing. */ + + /* What are we parsing. stFile, or stBlock are for files and + blocks. stProc or stStaticProc means we have seen the start of a + procedure, but not the start of the block within in. When we see + the start of that block, we change it to stNil, without pushing a + new block, i.e. stNil means both a procedure and a block. */ + + int blocktype; + int maxsyms; /* Max symbols in this block. */ struct type *cur_type; /* Type we parse fields for. */ int cur_field; /* Field number in cur_type. */ @@ -1134,6 +1139,17 @@ parse_symbol (sh, ax, ext_sh, bigend) /* beginnning of (code) block. Value of symbol is the displacement from procedure start */ push_parse_stack (); + + /* Do not start a new block if this is the outermost block of a + procedure. This allows the LOC_BLOCK symbol to point to the + block with the local variables, so funcname::var works. */ + if (top_stack->blocktype == stProc + || top_stack->blocktype == stStaticProc) + { + top_stack->blocktype = stNil; + break; + } + top_stack->blocktype = stBlock; b = new_block (top_stack->maxsyms); BLOCK_START (b) = sh->value + top_stack->procadr; @@ -1197,6 +1213,12 @@ parse_symbol (sh, ax, ext_sh, bigend) BLOCK_END (top_stack->cur_block) = sh->value + top_stack->procadr; shrink_block (top_stack->cur_block, top_stack->cur_st); } + else if (sh->sc == scText && top_stack->blocktype == stNil) + { + /* End of outermost block. Pop parse stack and ignore. The + following stEnd of stProc will take care of the block. */ + ; + } else if (sh->sc == scText && top_stack->blocktype == stFile) { /* End of file. Pop parse stack and ignore. Higher @@ -1676,20 +1698,19 @@ upgrade_type (fd, tpp, tq, ax, bigend, sym_name) t = create_array_type ((struct type *) NULL, *tpp, range); - /* Check whether supplied array element bit size matches - the known size of the element type. If this complaint - ends up not happening, we can remove this code. It's - here because we aren't sure we understand this *&%&$ - symbol format. */ - id = TYPE_LENGTH (TYPE_TARGET_TYPE (t)) << 3; /* bitsize */ - if (id == 0) - { - /* Most likely an undefined type */ - id = rf; - TYPE_LENGTH (TYPE_TARGET_TYPE (t)) = id >> 3; - } - if (id != rf) - complain (&array_bitsize_complaint, sym_name, rf); + /* We used to fill in the supplied array element bitsize + here if the TYPE_LENGTH of the target type was zero. + This happens for a `pointer to an array of anonymous structs', + but in this case the array element bitsize is also zero, + so nothing is gained. + And we used to check the TYPE_LENGTH of the target type against + the supplied array element bitsize. + gcc causes a mismatch for `pointer to array of object', + since the sdb directives it uses do not have a way of + specifying the bitsize, but it does no harm (the + TYPE_LENGTH should be correct) and we should be able to + ignore the erroneous bitsize from the auxiliary entry safely. + dbx seems to ignore it too. */ *tpp = t; return 4 + off; @@ -3595,6 +3616,7 @@ mipscoff_symfile_offsets (objfile, addr) struct section_offsets *section_offsets; int i; + objfile->num_sections = SECT_OFF_MAX; section_offsets = ((struct section_offsets *) obstack_alloc (&objfile->psymbol_obstack, (sizeof (struct section_offsets) diff --git a/gdb/nlmread.c b/gdb/nlmread.c index 70328c9f4e6..2ce4c2e2770 100644 --- a/gdb/nlmread.c +++ b/gdb/nlmread.c @@ -266,7 +266,8 @@ nlm_symfile_offsets (objfile, addr) { struct section_offsets *section_offsets; int i; - + + objfile->num_sections = SECT_OFF_MAX; section_offsets = (struct section_offsets *) obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct section_offsets) + @@ -281,7 +282,7 @@ nlm_symfile_offsets (objfile, addr) } -/* Register that we are able to handle NLM file format. */ +/* Register that we are able to handle NLM file format. */ static struct sym_fns nlm_sym_fns = { diff --git a/gdb/objfiles.c b/gdb/objfiles.c index b890657c99e..dfac45e8cff 100644 --- a/gdb/objfiles.c +++ b/gdb/objfiles.c @@ -92,9 +92,10 @@ add_to_objfile_sections (abfd, asect, objfile_p_char) } /* Builds a section table for OBJFILE. - Returns 0 if OK, 1 on error. */ + Returns 0 if OK, 1 on error (in which case bfd_error contains the + error). */ -static int +int build_objfile_section_table (objfile) struct objfile *objfile; { @@ -356,6 +357,8 @@ free_objfile (objfile) (t->to_detach) (NULL, 0); } #endif + /* I *think* all our callers call clear_symtab_users. If so, no need + to call this here. */ clear_pc_function_cache (); /* The last thing we do is free the objfile struct itself for the diff --git a/gdb/objfiles.h b/gdb/objfiles.h index 50226ff47e7..b5b06223728 100644 --- a/gdb/objfiles.h +++ b/gdb/objfiles.h @@ -357,14 +357,13 @@ extern struct objfile *object_files; /* Declarations for functions defined in objfiles.c */ -extern struct objfile * -allocate_objfile PARAMS ((bfd *, int)); +extern struct objfile *allocate_objfile PARAMS ((bfd *, int)); -extern void -unlink_objfile PARAMS ((struct objfile *)); +int build_objfile_section_table PARAMS ((struct objfile *)); -extern void -free_objfile PARAMS ((struct objfile *)); +extern void unlink_objfile PARAMS ((struct objfile *)); + +extern void free_objfile PARAMS ((struct objfile *)); extern void free_all_objfiles PARAMS ((void)); diff --git a/gdb/paread.c b/gdb/paread.c index c79ddb538b5..95489d925bb 100644 --- a/gdb/paread.c +++ b/gdb/paread.c @@ -487,22 +487,22 @@ pa_symfile_offsets (objfile, addr) { struct section_offsets *section_offsets; int i; - + + objfile->num_sections = SECT_OFF_MAX; section_offsets = (struct section_offsets *) obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct section_offsets) + - sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); + sizeof (struct section_offsets) + + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); for (i = 0; i < SECT_OFF_MAX; i++) ANOFFSET (section_offsets, i) = addr; - + return section_offsets; } -/* Register that we are able to handle PA object file formats. */ +/* Register that we are able to handle SOM object file formats (does this + work for hp300, or just PA? I suspect the latter). */ -/* This is probably a mistake. FIXME. Why can't the HP's use an ordinary - file format name with an -hppa suffix? */ static struct sym_fns pa_sym_fns = { "som", /* sym_name: name or name prefix of BFD target type */ diff --git a/gdb/remote.c b/gdb/remote.c index 189977ddb96..6fffc54c7f8 100644 --- a/gdb/remote.c +++ b/gdb/remote.c @@ -228,7 +228,12 @@ int icache; starts. */ serial_t remote_desc = NULL; -#define PBUFSIZ 1024 +/* Having this larger than 400 causes us to be incompatible with m68k-stub.c + and i386-stub.c. Normally, no one would notice because it only matters + for writing large chunks of memory (e.g. in downloads). Also, this needs + to be more than 400 if required to hold the registers (see below, where + we round it up based on REGISTER_BYTES). */ +#define PBUFSIZ 400 /* Maximum number of bytes to read/write at once. The value here is chosen to fill up a packet (the headers account for the 32). */ @@ -560,12 +565,6 @@ remote_wait (pid, status) stuff. (Just what does "text" as seen by the stub mean, anyway?). */ - /* FIXME: Why don't the various symfile_offsets routines - in the sym_fns vectors set this? - (no good reason -kingdon). */ - if (symfile_objfile->num_sections == 0) - symfile_objfile->num_sections = SECT_OFF_MAX; - offs = ((struct section_offsets *) alloca (sizeof (struct section_offsets) + (symfile_objfile->num_sections @@ -798,9 +797,6 @@ remote_write_bytes (memaddr, myaddr, len) int i; char *p; - if (len > PBUFSIZ / 2 - 20) - abort (); - sprintf (buf, "M%x,%x:", memaddr, len); /* We send target system values byte by byte, in increasing byte addresses, diff --git a/gdb/symfile.c b/gdb/symfile.c index c2ea7dcad2a..5dbcbfa4874 100644 --- a/gdb/symfile.c +++ b/gdb/symfile.c @@ -32,6 +32,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "language.h" #include "complaints.h" #include "demangle.h" +#include "inferior.h" /* for write_pc */ #include #include @@ -214,21 +215,6 @@ sort_symtab_syms (s) } } -void -sort_all_symtab_syms () -{ - register struct symtab *s; - register struct objfile *objfile; - - for (objfile = object_files; objfile != NULL; objfile = objfile -> next) - { - for (s = objfile -> symtabs; s != NULL; s = s -> next) - { - sort_symtab_syms (s); - } - } -} - /* Make a copy of the string at PTR with SIZE characters in the symbol obstack (and add a null character at the end in the copy). Returns the address of the copy. */ @@ -317,6 +303,14 @@ init_entry_point_info (objfile) } } +/* Get current entry point address. */ + +CORE_ADDR +entry_point_address() +{ + return symfile_objfile ? symfile_objfile->ei.entry_point : 0; +} + /* Remember the lowest-addressed loadable section we've seen. This function is called via bfd_map_over_sections. */ @@ -410,10 +404,10 @@ syms_from_objfile (objfile, addr, mainline, verbo) else if (0 == bfd_get_section_name (objfile->obfd, lowest_sect) || !STREQ (".text", bfd_get_section_name (objfile->obfd, lowest_sect))) - warning ("Lowest section in %s is %s at 0x%x", + warning ("Lowest section in %s is %s at 0x%lx", objfile->name, bfd_section_name (objfile->obfd, lowest_sect), - bfd_section_vma (objfile->obfd, lowest_sect)); + (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect)); if (lowest_sect) addr -= bfd_section_vma (objfile->obfd, lowest_sect); @@ -426,9 +420,6 @@ syms_from_objfile (objfile, addr, mainline, verbo) (*objfile -> sf -> sym_init) (objfile); clear_complaints (1, verbo); - /* If objfile->sf->sym_offsets doesn't set this, we don't care - (currently). */ - objfile->num_sections = 0; /* krp-FIXME: why zero? */ section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr); objfile->section_offsets = section_offsets; @@ -468,8 +459,10 @@ syms_from_objfile (objfile, addr, mainline, verbo) (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline); - /* Don't allow char * to have a typename (else would get caddr_t.) */ - /* Ditto void *. FIXME should do this for all the builtin types. */ + /* Don't allow char * to have a typename (else would get caddr_t). + Ditto void *. FIXME: Check whether this is now done by all the + symbol readers themselves (many of them now do), and if so remove + it from here. */ TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; @@ -871,9 +864,9 @@ generic_load (filename, from_tty) /* Is this really necessary? I guess it gives the user something to look at during a long download. */ - printf_filtered ("Loading section %s, size 0x%x vma 0x%x\n", + printf_filtered ("Loading section %s, size 0x%lx vma 0x%lx\n", bfd_get_section_name (loadfile_bfd, s), - size, vma); + (unsigned long) size, (unsigned long) vma); bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); @@ -967,7 +960,7 @@ add_symbol_file_command (args, from_tty) text_addr = parse_and_eval_address (args); if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", - name, local_hex_string (text_addr))) + name, local_hex_string ((unsigned long)text_addr))) error ("Not confirmed."); symbol_file_add (name, 0, text_addr, 0, mapped, readnow); @@ -989,7 +982,6 @@ reread_symbols () This routine should then walk down each partial symbol table and see if the symbol table that it originates from has been changed */ -the_big_top: for (objfile = object_files; objfile; objfile = objfile->next) { if (objfile->obfd) { #ifdef IBM6000_TARGET @@ -1008,24 +1000,142 @@ the_big_top: continue; } new_modtime = new_statbuf.st_mtime; - if (new_modtime != objfile->mtime) { - printf_filtered ("`%s' has changed; re-reading symbols.\n", - objfile->name); - /* FIXME, this should use a different command...that would only - affect this objfile's symbols, and would reset objfile->mtime. - (objfile->mtime = new_modtime;) - HOWEVER, that command isn't written yet -- so call symbol_file_ - command, and restart the scan from the top, because it munges - the object_files list. */ - symbol_file_command (objfile->name, 0); - reread_one = 1; - goto the_big_top; /* Start over. */ - } + if (new_modtime != objfile->mtime) + { + struct cleanup *old_cleanups; + struct section_offsets *offsets; + int num_offsets; + int section_offsets_size; + + printf_filtered ("`%s' has changed; re-reading symbols.\n", + objfile->name); + + /* There are various functions like symbol_file_add, + symfile_bfd_open, syms_from_objfile, etc., which might + appear to do what we want. But they have various other + effects which we *don't* want. So we just do stuff + ourselves. We don't worry about mapped files (for one thing, + any mapped file will be out of date). */ + + /* If we get an error, blow away this objfile (not sure if + that is the correct response for things like shared + libraries). */ + old_cleanups = make_cleanup (free_objfile, objfile); + /* We need to do this whenever any symbols go away. */ + make_cleanup (clear_symtab_users, 0); + + /* Clean up any state BFD has sitting around. We don't need + to close the descriptor but BFD lacks a way of closing the + BFD without closing the descriptor. */ + if (!bfd_close (objfile->obfd)) + error ("Can't close BFD for %s.", objfile->name); + objfile->obfd = bfd_openr (objfile->name, gnutarget); + if (objfile->obfd == NULL) + error ("Can't open %s to read symbols.", objfile->name); + /* bfd_openr sets cacheable to true, which is what we want. */ + if (!bfd_check_format (objfile->obfd, bfd_object)) + error ("Can't read symbols from %s: %s.", objfile->name, + bfd_errmsg (bfd_error)); + + /* Save the offsets, we will nuke them with the rest of the + psymbol_obstack. */ + num_offsets = objfile->num_sections; + section_offsets_size = + sizeof (struct section_offsets) + + sizeof (objfile->section_offsets->offsets) * num_offsets; + offsets = (struct section_offsets *) alloca (section_offsets_size); + memcpy (offsets, objfile->section_offsets, section_offsets_size); + + /* Nuke all the state that we will re-read. Much of the following + code which sets things to NULL really is necessary to tell + other parts of GDB that there is nothing currently there. */ + + /* FIXME: Do we have to free a whole linked list, or is this + enough? */ + if (objfile->global_psymbols.list) + mfree (objfile->md, objfile->global_psymbols.list); + objfile->global_psymbols.list = NULL; + objfile->global_psymbols.size = 0; + if (objfile->static_psymbols.list) + mfree (objfile->md, objfile->static_psymbols.list); + objfile->static_psymbols.list = NULL; + objfile->static_psymbols.size = 0; + + /* Free the obstacks for non-reusable objfiles */ + obstack_free (&objfile -> psymbol_obstack, 0); + obstack_free (&objfile -> symbol_obstack, 0); + obstack_free (&objfile -> type_obstack, 0); + objfile->sections = NULL; + objfile->symtabs = NULL; + objfile->psymtabs = NULL; + objfile->free_psymtabs = NULL; + objfile->msymbols = NULL; + objfile->minimal_symbol_count= 0; + objfile->fundamental_types = NULL; + if (objfile -> sf != NULL) + { + (*objfile -> sf -> sym_finish) (objfile); + } + + /* We never make this a mapped file. */ + objfile -> md = NULL; + /* obstack_specify_allocation also initializes the obstack so + it is empty. */ + obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, + xmalloc, free); + obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, + xmalloc, free); + obstack_specify_allocation (&objfile -> type_obstack, 0, 0, + xmalloc, free); + if (build_objfile_section_table (objfile)) + { + error ("Can't find the file sections in `%s': %s", + objfile -> name, bfd_errmsg (bfd_error)); + } + + /* We use the same section offsets as from last time. I'm not + sure whether that is always correct for shared libraries. */ + objfile->section_offsets = (struct section_offsets *) + obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size); + memcpy (objfile->section_offsets, offsets, section_offsets_size); + objfile->num_sections = num_offsets; + + /* What the hell is sym_new_init for, anyway? The concept of + distinguishing between the main file and additional files + in this way seems rather dubious. */ + if (objfile == symfile_objfile) + (*objfile->sf->sym_new_init) (objfile); + + (*objfile->sf->sym_init) (objfile); + clear_complaints (1, 1); + /* The "mainline" parameter is a hideous hack; I think leaving it + zero is OK since dbxread.c also does what it needs to do if + objfile->global_psymbols.size is 0. */ + (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0); + objfile -> flags |= OBJF_SYMS; + + /* We're done reading the symbol file; finish off complaints. */ + clear_complaints (0, 1); + + /* Getting new symbols may change our opinion about what is + frameless. */ + + reinit_frame_cache (); + + /* Discard cleanups as symbol reading was successful. */ + discard_cleanups (old_cleanups); + + /* If the mtime has changed between the time we set new_modtime + and now, we *want* this to be out of date, so don't call stat + again now. */ + objfile->mtime = new_modtime; + reread_one = 1; + } } } if (reread_one) - breakpoint_re_set (); + clear_symtab_users (); } @@ -1039,13 +1149,13 @@ deduce_language_from_filename (filename) ; /* Get default */ else if (0 == (c = strrchr (filename, '.'))) ; /* Get default. */ - else if(STREQ(c,".mod")) + else if (STREQ(c,".mod")) return language_m2; - else if(STREQ(c,".c")) + else if (STREQ(c,".c")) return language_c; - else if(STREQ(c,".cc") || STREQ(c,".C")) + else if (STREQ (c,".cc") || STREQ (c,".C") || STREQ (c, ".cxx")) return language_cplus; - else if(STREQ(c,".ch") || STREQ(c,".c186") || STREQ(c,".c286")) + else if (STREQ (c,".ch") || STREQ (c,".c186") || STREQ (c,".c286")) return language_chill; return language_unknown; /* default */ @@ -1141,6 +1251,7 @@ clear_symtab_users () set_default_breakpoint (0, 0, 0, 0); current_source_symtab = 0; current_source_line = 0; + clear_pc_function_cache (); } /* clear_symtab_users_once: