diff options
Diffstat (limited to 'gdb/stabsread.c')
| -rw-r--r-- | gdb/stabsread.c | 2501 |
1 files changed, 2493 insertions, 8 deletions
diff --git a/gdb/stabsread.c b/gdb/stabsread.c index 1158519..6ee61e0 100644 --- a/gdb/stabsread.c +++ b/gdb/stabsread.c @@ -1,6 +1,6 @@ /* Support routines for decoding "stabs" debugging information format. - Copyright (C) 1986-2024 Free Software Foundation, Inc. + Copyright (C) 1986-2025 Free Software Foundation, Inc. This file is part of GDB. @@ -33,6 +33,7 @@ #include "symfile.h" #include "objfiles.h" #include "aout/stab_gnu.h" +#include "psymtab.h" #include "libaout.h" #include "aout/aout64.h" #include "gdb-stabs.h" @@ -46,6 +47,8 @@ #include "cp-abi.h" #include "cp-support.h" #include <ctype.h> +#include "block.h" +#include "filenames.h" #include "stabsread.h" @@ -61,6 +64,26 @@ int *this_object_header_files; int n_this_object_header_files; int n_allocated_this_object_header_files; +/* See stabsread.h. */ + +const registry<objfile>::key<dbx_symfile_info> dbx_objfile_data_key; + +dbx_symfile_info::~dbx_symfile_info () +{ + if (header_files != NULL) + { + int i = n_header_files; + struct header_file *hfiles = header_files; + + while (--i >= 0) + { + xfree (hfiles[i].name); + xfree (hfiles[i].vector); + } + xfree (hfiles); + } +} + struct stabs_nextfield { struct stabs_nextfield *next; @@ -165,6 +188,26 @@ void stabsread_clear_cache (void); static const char vptr_name[] = "_vptr$"; static const char vb_name[] = "_vb$"; +void +unknown_symtype_complaint (const char *arg1) +{ + complaint (_("unknown symbol type %s"), arg1); +} + +void +lbrac_mismatch_complaint (int arg1) +{ + complaint (_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1); +} + +void +repeated_header_complaint (const char *arg1, int arg2) +{ + complaint (_("\"repeated\" header file %s not " + "previously seen, at symtab pos %d"), + arg1, arg2); +} + static void invalid_cpp_abbrev_complaint (const char *arg1) { @@ -184,6 +227,14 @@ stabs_general_complaint (const char *arg1) complaint ("%s", arg1); } +static void +function_outside_compilation_unit_complaint (const char *arg1) +{ + complaint (_("function `%s' appears to be defined " + "outside of all compilation units"), + arg1); +} + /* Make a list of forward references which haven't been defined. */ static struct type **undef_types; @@ -491,6 +542,2442 @@ read_type_number (const char **pp, int *typenums) } +/* Free up old header file tables. */ + +void +free_header_files (void) +{ + if (this_object_header_files) + { + xfree (this_object_header_files); + this_object_header_files = NULL; + } + n_allocated_this_object_header_files = 0; +} + +/* Allocate new header file tables. */ + +void +init_header_files (void) +{ + n_allocated_this_object_header_files = 10; + this_object_header_files = XNEWVEC (int, 10); +} + +/* Close off the current usage of PST. + Returns PST or NULL if the partial symtab was empty and thrown away. + + FIXME: List variables and peculiarities of same. */ + +legacy_psymtab * +stabs_end_psymtab (struct objfile *objfile, psymtab_storage *partial_symtabs, + legacy_psymtab *pst, + const char **include_list, int num_includes, + int capping_symbol_offset, unrelocated_addr capping_text, + legacy_psymtab **dependency_list, + int number_dependencies, + int textlow_not_set) +{ + int i; + struct gdbarch *gdbarch = objfile->arch (); + dbx_symfile_info *key = dbx_objfile_data_key. get (objfile); + + if (capping_symbol_offset != -1) + LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst); + pst->set_text_high (capping_text); + + /* Under Solaris, the N_SO symbols always have a value of 0, + instead of the usual address of the .o file. Therefore, + we have to do some tricks to fill in texthigh and textlow. + The first trick is: if we see a static + or global function, and the textlow for the current pst + is not set (ie: textlow_not_set), then we use that function's + address for the textlow of the pst. */ + + /* Now, to fill in texthigh, we remember the last function seen + in the .o file. Also, there's a hack in + bfd/elf.c and gdb/elfread.c to pass the ELF st_size field + to here via the misc_info field. Therefore, we can fill in + a reliable texthigh by taking the address plus size of the + last function in the file. */ + + if (!pst->text_high_valid && key->ctx.last_function_name + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + int n; + + const char *colon = strchr (key->ctx.last_function_name, ':'); + if (colon == NULL) + n = 0; + else + n = colon - key->ctx.last_function_name; + char *p = (char *) alloca (n + 2); + strncpy (p, key->ctx.last_function_name, n); + p[n] = 0; + + bound_minimal_symbol minsym + = lookup_minimal_symbol (current_program_space, p, objfile, + pst->filename); + if (minsym.minsym == NULL) + { + /* Sun Fortran appends an underscore to the minimal symbol name, + try again with an appended underscore if the minimal symbol + was not found. */ + p[n] = '_'; + p[n + 1] = 0; + minsym = lookup_minimal_symbol (current_program_space, p, objfile, + pst->filename); + } + + if (minsym.minsym) + pst->set_text_high + (unrelocated_addr (CORE_ADDR (minsym.minsym->unrelocated_address ()) + + minsym.minsym->size ())); + + key->ctx.last_function_name = NULL; + } + + if (!gdbarch_sofun_address_maybe_missing (gdbarch)) + ; + /* This test will be true if the last .o file is only data. */ + else if (textlow_not_set) + pst->set_text_low (pst->unrelocated_text_high ()); + else + { + /* If we know our own starting text address, then walk through all other + psymtabs for this objfile, and if any didn't know their ending text + address, set it to our starting address. Take care to not set our + own ending address to our starting address. */ + + for (partial_symtab *p1 : partial_symtabs->range ()) + if (!p1->text_high_valid && p1->text_low_valid && p1 != pst) + p1->set_text_high (pst->unrelocated_text_low ()); + } + + /* End of kludge for patching Solaris textlow and texthigh. */ + + pst->end (); + + pst->number_of_dependencies = number_dependencies; + if (number_dependencies) + { + pst->dependencies + = partial_symtabs->allocate_dependencies (number_dependencies); + memcpy (pst->dependencies, dependency_list, + number_dependencies * sizeof (legacy_psymtab *)); + } + else + pst->dependencies = 0; + + for (i = 0; i < num_includes; i++) + { + legacy_psymtab *subpst = + new legacy_psymtab (include_list[i], partial_symtabs, objfile->per_bfd); + + subpst->read_symtab_private = + XOBNEW (&objfile->objfile_obstack, struct symloc); + LDSYMOFF (subpst) = + LDSYMLEN (subpst) = 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 = + partial_symtabs->allocate_dependencies (1); + subpst->dependencies[0] = pst; + subpst->number_of_dependencies = 1; + + subpst->legacy_read_symtab = pst->legacy_read_symtab; + subpst->legacy_expand_psymtab = pst->legacy_expand_psymtab; + } + + if (num_includes == 0 + && number_dependencies == 0 + && pst->empty () + && key->ctx.has_line_numbers == 0) + { + /* Throw away this psymtab, it's empty. */ + /* Empty psymtabs happen as a result of header files which don't have + any symbols in them. There can be a lot of them. But this check + is wrong, in that a psymtab with N_SLINE entries but nothing else + is not empty, but we don't realize that. Fixing that without slowing + things down might be tricky. */ + + partial_symtabs->discard_psymtab (pst); + + /* Indicate that psymtab was thrown away. */ + pst = NULL; + } + return pst; +} + +/* Set namestring based on nlist. If the string table index is invalid, + give a fake name, and print a single error message per symbol file read, + rather than abort the symbol reading or flood the user with messages. */ + +static const char * +set_namestring (struct objfile *objfile, const struct internal_nlist *nlist) +{ + const char *namestring; + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + if (nlist->n_strx + key->ctx.file_string_table_offset + >= DBX_STRINGTAB_SIZE (objfile) + || nlist->n_strx + key->ctx.file_string_table_offset < nlist->n_strx) + { + complaint (_("bad string table offset in symbol %d"), + symnum); + namestring = "<bad string table offset>"; + } + else + namestring = (nlist->n_strx + key->ctx.file_string_table_offset + + DBX_STRINGTAB (objfile)); + return namestring; +} + +static void +stabs_seek (int sym_offset, struct objfile *objfile) +{ + dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + if (key->ctx.stabs_data) + { + key->ctx.symbuf_read += sym_offset; + key->ctx.symbuf_left -= sym_offset; + } + else + if (bfd_seek (objfile->obfd.get (), sym_offset, SEEK_CUR) != 0) + perror_with_name (bfd_get_filename (objfile->obfd.get ())); +} + +/* Buffer for reading the symbol table entries. */ +static struct external_nlist symbuf[4096]; +static int symbuf_idx; +static int symbuf_end; + +/* 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. */ + +static void +fill_symbuf (bfd *sym_bfd, struct objfile *objfile) +{ + unsigned int count; + int nbytes; + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + if (key->ctx.stabs_data) + { + nbytes = sizeof (symbuf); + if (nbytes > key->ctx.symbuf_left) + nbytes = key->ctx.symbuf_left; + memcpy (symbuf, key->ctx.stabs_data + key->ctx.symbuf_read, nbytes); + } + else if (key->ctx.symbuf_sections == NULL) + { + count = sizeof (symbuf); + nbytes = bfd_read (symbuf, count, sym_bfd); + } + else + { + if (key->ctx.symbuf_left <= 0) + { + file_ptr filepos = (*key->ctx.symbuf_sections)[key->ctx.sect_idx]->filepos; + + if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0) + perror_with_name (bfd_get_filename (sym_bfd)); + key->ctx.symbuf_left = bfd_section_size ((*key->ctx.symbuf_sections)[key->ctx.sect_idx]); + key->ctx.symbol_table_offset = filepos - key->ctx.symbuf_read; + ++key->ctx.sect_idx; + } + + count = key->ctx.symbuf_left; + if (count > sizeof (symbuf)) + count = sizeof (symbuf); + nbytes = bfd_read (symbuf, count, sym_bfd); + } + + if (nbytes < 0) + perror_with_name (bfd_get_filename (sym_bfd)); + else if (nbytes == 0) + error (_("Premature end of file reading symbol table")); + symbuf_end = nbytes / key->ctx.symbol_size; + symbuf_idx = 0; + key->ctx.symbuf_left -= nbytes; + key->ctx.symbuf_read += nbytes; +} + +/* Read in a defined section of a specific object file's symbols. */ + +static void +read_ofile_symtab (struct objfile *objfile, legacy_psymtab *pst) +{ + const char *namestring; + struct external_nlist *bufp; + struct internal_nlist nlist; + unsigned char type; + unsigned max_symnum; + bfd *abfd; + int sym_offset; /* Offset to start of symbols to read */ + int sym_size; /* Size of symbols to read */ + CORE_ADDR text_offset; /* Start of text segment for symbols */ + int text_size; /* Size of text segment for symbols */ + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + sym_offset = LDSYMOFF (pst); + sym_size = LDSYMLEN (pst); + text_offset = pst->text_low (objfile); + text_size = pst->text_high (objfile) - pst->text_low (objfile); + const section_offsets §ion_offsets = objfile->section_offsets; + + key->ctx.stringtab_global = DBX_STRINGTAB (objfile); + set_last_source_file (NULL); + + abfd = objfile->obfd.get (); + symbuf_end = symbuf_idx = 0; + key->ctx.symbuf_read = 0; + key->ctx.symbuf_left = sym_offset + sym_size; + + /* It is necessary to actually read one symbol *before* the start + of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL + occurs before the N_SO symbol. + + Detecting this in read_stabs_symtab + would slow down initial readin, so we look for it here instead. */ + if (!key->ctx.processing_acc_compilation && sym_offset >= (int) key->ctx.symbol_size) + { + stabs_seek (sym_offset - key->ctx.symbol_size, objfile); + fill_symbuf (abfd, objfile); + bufp = &symbuf[symbuf_idx++]; + INTERNALIZE_SYMBOL (nlist, bufp, abfd); + OBJSTAT (objfile, n_stabs++); + + namestring = set_namestring (objfile, &nlist); + + processing_gcc_compilation = 0; + if (nlist.n_type == N_TEXT) + { + const char *tempstring = namestring; + + if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0) + processing_gcc_compilation = 1; + else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0) + processing_gcc_compilation = 2; + if (*tempstring != '\0' + && *tempstring == bfd_get_symbol_leading_char (objfile->obfd.get ())) + ++tempstring; + if (startswith (tempstring, "__gnu_compiled")) + processing_gcc_compilation = 2; + } + } + else + { + /* The N_SO starting this symtab is the first symbol, so we + better not check the symbol before it. I'm not this can + happen, but it doesn't hurt to check for it. */ + stabs_seek (sym_offset, objfile); + processing_gcc_compilation = 0; + } + + if (symbuf_idx == symbuf_end) + fill_symbuf (abfd, objfile); + bufp = &symbuf[symbuf_idx]; + if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO) + error (_("First symbol in segment of executable not a source symbol")); + + max_symnum = sym_size / key->ctx.symbol_size; + + for (symnum = 0; + symnum < max_symnum; + symnum++) + { + QUIT; /* Allow this to be interruptible. */ + if (symbuf_idx == symbuf_end) + fill_symbuf (abfd, objfile); + bufp = &symbuf[symbuf_idx++]; + INTERNALIZE_SYMBOL (nlist, bufp, abfd); + OBJSTAT (objfile, n_stabs++); + + type = bfd_h_get_8 (abfd, bufp->e_type); + + namestring = set_namestring (objfile, &nlist); + + if (type & N_STAB) + { + if (sizeof (nlist.n_value) > 4 + /* We are a 64-bit debugger debugging a 32-bit program. */ + && (type == N_LSYM || type == N_PSYM)) + /* We have to be careful with the n_value in the case of N_LSYM + and N_PSYM entries, because they are signed offsets from frame + pointer, but we actually read them as unsigned 32-bit values. + This is not a problem for 32-bit debuggers, for which negative + values end up being interpreted correctly (as negative + offsets) due to integer overflow. + But we need to sign-extend the value for 64-bit debuggers, + or we'll end up interpreting negative values as very large + positive offsets. */ + nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000; + process_one_symbol (type, nlist.n_desc, nlist.n_value, + namestring, section_offsets, objfile, + PST_LANGUAGE (pst)); + } + /* We skip checking for a new .o or -l file; that should never + happen in this routine. */ + else if (type == N_TEXT) + { + /* I don't think this code will ever be executed, because + the GCC_COMPILED_FLAG_SYMBOL usually is right before + the N_SO symbol which starts this source file. + However, there is no reason not to accept + the GCC_COMPILED_FLAG_SYMBOL anywhere. */ + + if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0) + processing_gcc_compilation = 1; + else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0) + processing_gcc_compilation = 2; + } + else if (type & N_EXT || type == (unsigned char) N_TEXT + || type == (unsigned char) N_NBTEXT) + { + /* Global symbol: see if we came across a dbx definition for + a corresponding symbol. If so, store the value. Remove + syms from the chain when their values are stored, but + search the whole chain, as there may be several syms from + different files with the same name. */ + /* This is probably not true. Since the files will be read + in one at a time, each reference to a global symbol will + be satisfied in each file as it appears. So we skip this + section. */ + ; + } + } + + /* In a Solaris elf file, this variable, which comes from the value + of the N_SO symbol, will still be 0. Luckily, text_offset, which + comes from low text address of PST, is correct. */ + if (get_last_source_start_addr () == 0) + set_last_source_start_addr (text_offset); + + /* In reordered executables last_source_start_addr may not be the + lower bound for this symtab, instead use text_offset which comes + from the low text address of PST, which is correct. */ + if (get_last_source_start_addr () > text_offset) + set_last_source_start_addr (text_offset); + + pst->compunit_symtab = end_compunit_symtab (text_offset + text_size); + + end_stabs (); + +} + +static void +dbx_expand_psymtab (legacy_psymtab *pst, struct objfile *objfile) +{ + gdb_assert (!pst->readin); + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + /* Read in all partial symtabs on which this one is dependent. */ + pst->expand_dependencies (objfile); + + if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */ + { + /* Init stuff necessary for reading in symbols */ + stabsread_init (); + scoped_free_pendings free_pending; + key->ctx.file_string_table_offset = FILE_STRING_OFFSET (pst); + key->ctx.symbol_size = SYMBOL_SIZE (pst); + + /* Read in this file's symbols. */ + if (bfd_seek (objfile->obfd.get (), SYMBOL_OFFSET (pst), SEEK_SET) == 0) + read_ofile_symtab (objfile, pst); + } + + pst->readin = true; +} + +/* Invariant: The symbol pointed to by symbuf_idx is the first one + that hasn't been swapped. Swap the symbol at the same time + that symbuf_idx is incremented. */ + +/* dbx allows the text of a symbol name to be continued into the + next symbol name! When such a continuation is encountered + (a \ at the end of the text of a name) + call this function to get the continuation. */ + +static const char * +dbx_next_symbol_text (struct objfile *objfile) +{ + struct internal_nlist nlist; + dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + if (symbuf_idx == symbuf_end) + fill_symbuf (objfile->obfd.get (), objfile); + + symnum++; + INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], objfile->obfd.get ()); + OBJSTAT (objfile, n_stabs++); + + symbuf_idx++; + + return nlist.n_strx + key->ctx.stringtab_global + + key->ctx.file_string_table_offset; +} + +/* Read in all of the symbols for a given psymtab for real. + Be verbose about it if the user wants that. SELF is not NULL. */ + +static void +stabs_read_symtab (legacy_psymtab *self, struct objfile *objfile) +{ + gdb_assert (!self->readin); + + if (LDSYMLEN (self) || self->number_of_dependencies) + { + next_symbol_text_func = dbx_next_symbol_text; + dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + { + scoped_restore restore_stabs_data = make_scoped_restore (&key->ctx.stabs_data); + gdb::unique_xmalloc_ptr<gdb_byte> data_holder; + if (DBX_STAB_SECTION (objfile)) + { + key->ctx.stabs_data + = symfile_relocate_debug_section (objfile, + DBX_STAB_SECTION (objfile), + NULL); + data_holder.reset (key->ctx.stabs_data); + } + + self->expand_psymtab (objfile); + } + + /* 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 (objfile); + } +} + +static void +record_minimal_symbol (minimal_symbol_reader &reader, + const char *name, unrelocated_addr address, int type, + struct objfile *objfile) +{ + enum minimal_symbol_type ms_type; + int section; + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + switch (type) + { + case N_TEXT | N_EXT: + ms_type = mst_text; + section = SECT_OFF_TEXT (objfile); + break; + case N_DATA | N_EXT: + ms_type = mst_data; + section = SECT_OFF_DATA (objfile); + break; + case N_BSS | N_EXT: + ms_type = mst_bss; + section = SECT_OFF_BSS (objfile); + break; + case N_ABS | N_EXT: + ms_type = mst_abs; + section = -1; + break; +#ifdef N_SETV + case N_SETV | N_EXT: + ms_type = mst_data; + section = SECT_OFF_DATA (objfile); + break; + case N_SETV: + /* I don't think this type actually exists; since a N_SETV is the result + of going over many .o files, it doesn't make sense to have one + file local. */ + ms_type = mst_file_data; + section = SECT_OFF_DATA (objfile); + break; +#endif + case N_TEXT: + case N_NBTEXT: + case N_FN: + case N_FN_SEQ: + ms_type = mst_file_text; + section = SECT_OFF_TEXT (objfile); + break; + case N_DATA: + ms_type = mst_file_data; + + /* Check for __DYNAMIC, which is used by Sun shared libraries. + Record it as global even if it's local, not global, so + lookup_minimal_symbol can find it. We don't check symbol_leading_char + because for SunOS4 it always is '_'. */ + if (strcmp ("__DYNAMIC", name) == 0) + ms_type = mst_data; + + /* Same with virtual function tables, both global and static. */ + { + const char *tempstring = name; + + if (*tempstring != '\0' + && *tempstring == bfd_get_symbol_leading_char (objfile->obfd.get ())) + ++tempstring; + if (is_vtable_name (tempstring)) + ms_type = mst_data; + } + section = SECT_OFF_DATA (objfile); + break; + case N_BSS: + ms_type = mst_file_bss; + section = SECT_OFF_BSS (objfile); + break; + default: + ms_type = mst_unknown; + section = -1; + break; + } + + if ((ms_type == mst_file_text || ms_type == mst_text) + && address < key->ctx.lowest_text_address) + key->ctx.lowest_text_address = address; + + reader.record_with_info (name, address, ms_type, section); +} + +/* Given a name, value pair, find the corresponding + bincl in the list. Return the partial symtab associated + with that header_file_location. */ + +static legacy_psymtab * +find_corresponding_bincl_psymtab (const char *name, int instance, + struct objfile* objfile) +{ + stabsread_context ctx = dbx_objfile_data_key.get (objfile) -> ctx; + for (const header_file_location &bincl : ctx.bincl_list) + if (bincl.instance == instance + && strcmp (name, bincl.name) == 0) + return bincl.pst; + + repeated_header_complaint (name, symnum); + return (legacy_psymtab *) 0; +} + +/* 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 legacy_psymtab * +start_psymtab (psymtab_storage *partial_symtabs, struct objfile *objfile, + const char *filename, unrelocated_addr textlow, int ldsymoff) +{ + legacy_psymtab *result = new legacy_psymtab (filename, partial_symtabs, + objfile->per_bfd, textlow); + + struct dbx_symfile_info *key = dbx_objfile_data_key.get(objfile); + + result->read_symtab_private = + XOBNEW (&objfile->objfile_obstack, struct symloc); + LDSYMOFF (result) = ldsymoff; + result->legacy_read_symtab = stabs_read_symtab; + result->legacy_expand_psymtab = dbx_expand_psymtab; + SYMBOL_SIZE (result) = key->ctx.symbol_size; + SYMBOL_OFFSET (result) = key->ctx.symbol_table_offset; + STRING_OFFSET (result) = 0; /* This used to be an uninitialized global. */ + FILE_STRING_OFFSET (result) = key->ctx.file_string_table_offset; + + /* Deduce the source language from the filename for this psymtab. */ + key->ctx.psymtab_language = deduce_language_from_filename (filename); + PST_LANGUAGE (result) = key->ctx.psymtab_language; + + return result; +} + +/* See stabsread.h. */ + +static void +read_stabs_symtab_1 (minimal_symbol_reader &reader, + psymtab_storage *partial_symtabs, + struct objfile *objfile) +{ + struct gdbarch *gdbarch = objfile->arch (); + struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */ + struct internal_nlist nlist; + CORE_ADDR text_addr; + int text_size; + const char *sym_name; + int sym_len; + unsigned int next_file_string_table_offset = 0; + struct dbx_symfile_info *dbx = dbx_objfile_data_key.get(objfile); + + const char *namestring; + int nsl; + int past_first_source_file = 0; + CORE_ADDR last_function_start = 0; + bfd *abfd; + int textlow_not_set; + int data_sect_index; + + /* Current partial symtab. */ + legacy_psymtab *pst; + + /* List of current psymtab's include files. */ + const char **psymtab_include_list; + int includes_allocated; + int includes_used; + + /* Index within current psymtab dependency list. */ + legacy_psymtab **dependency_list; + int dependencies_used, dependencies_allocated; + + text_addr = DBX_TEXT_ADDR (objfile); + text_size = DBX_TEXT_SIZE (objfile); + + /* FIXME. We probably want to change stringtab_global rather than add this + while processing every symbol entry. FIXME. */ + dbx->ctx.file_string_table_offset = 0; + + dbx->ctx.stringtab_global = DBX_STRINGTAB (objfile); + + pst = (legacy_psymtab *) 0; + + includes_allocated = 30; + includes_used = 0; + psymtab_include_list = (const char **) alloca (includes_allocated * + sizeof (const char *)); + + dependencies_allocated = 30; + dependencies_used = 0; + dependency_list = + (legacy_psymtab **) alloca (dependencies_allocated * + sizeof (legacy_psymtab *)); + + /* Init bincl list */ + std::vector<struct header_file_location> bincl_storage; + scoped_restore restore_bincl_global + = make_scoped_restore (&(dbx->ctx.bincl_list), bincl_storage); + + set_last_source_file (NULL); + + dbx->ctx.lowest_text_address = (unrelocated_addr) -1; + + abfd = objfile->obfd.get (); + symbuf_end = symbuf_idx = 0; + next_symbol_text_func = dbx_next_symbol_text; + textlow_not_set = 1; + dbx->ctx.has_line_numbers = 0; + + /* FIXME: jimb/2003-09-12: We don't apply the right section's offset + to global and static variables. The stab for a global or static + variable doesn't give us any indication of which section it's in, + so we can't tell immediately which offset in + objfile->section_offsets we should apply to the variable's + address. + + We could certainly find out which section contains the variable + by looking up the variable's unrelocated address with + find_pc_section, but that would be expensive; this is the + function that constructs the partial symbol tables by examining + every symbol in the entire executable, and it's + performance-critical. So that expense would not be welcome. I'm + not sure what to do about this at the moment. + + What we have done for years is to simply assume that the .data + section's offset is appropriate for all global and static + variables. Recently, this was expanded to fall back to the .bss + section's offset if there is no .data section, and then to the + .rodata section's offset. */ + data_sect_index = objfile->sect_index_data; + if (data_sect_index == -1) + data_sect_index = SECT_OFF_BSS (objfile); + if (data_sect_index == -1) + data_sect_index = SECT_OFF_RODATA (objfile); + + /* If data_sect_index is still -1, that's okay. It's perfectly fine + for the file to have no .data, no .bss, and no .text at all, if + it also has no global or static variables. */ + + for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) + { + /* Get the symbol for this run and pull out some info. */ + QUIT; /* Allow this to be interruptible. */ + if (symbuf_idx == symbuf_end) + fill_symbuf (abfd, objfile); + bufp = &symbuf[symbuf_idx++]; + + /* + * Special case to speed up readin. + */ + if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE) + { + dbx->ctx.has_line_numbers = 1; + continue; + } + + INTERNALIZE_SYMBOL (nlist, bufp, abfd); + OBJSTAT (objfile, n_stabs++); + + /* Ok. There is a lot of code duplicated in the rest of this + switch statement (for efficiency reasons). Since I don't + like duplicating code, I will do my penance here, and + describe the code which is duplicated: + + *) The assignment to namestring. + *) The call to strchr. + *) The addition of a partial symbol the two partial + symbol lists. This last is a large section of code, so + I've embedded it in the following macro. */ + + switch (nlist.n_type) + { + /* + * Standard, external, non-debugger, symbols + */ + + case N_TEXT | N_EXT: + case N_NBTEXT | N_EXT: + goto record_it; + + case N_DATA | N_EXT: + case N_NBDATA | N_EXT: + goto record_it; + + case N_BSS: + case N_BSS | N_EXT: + case N_NBBSS | N_EXT: + case N_SETV | N_EXT: /* FIXME, is this in BSS? */ + goto record_it; + + case N_ABS | N_EXT: + record_it: + namestring = set_namestring (objfile, &nlist); + + record_minimal_symbol (reader, namestring, + unrelocated_addr (nlist.n_value), + nlist.n_type, objfile); /* Always */ + continue; + + /* Standard, local, non-debugger, symbols. */ + + case N_NBTEXT: + + /* We need to be able to deal with both N_FN or N_TEXT, + because we have no way of knowing whether the sys-supplied ld + or GNU ld was used to make the executable. Sequents throw + in another wrinkle -- they renumbered N_FN. */ + + case N_FN: + case N_FN_SEQ: + case N_TEXT: + namestring = set_namestring (objfile, &nlist); + + if ((namestring[0] == '-' && namestring[1] == 'l') + || (namestring[(nsl = strlen (namestring)) - 1] == 'o' + && namestring[nsl - 2] == '.')) + { + unrelocated_addr unrel_val = unrelocated_addr (nlist.n_value); + + if (past_first_source_file && pst + /* The gould NP1 uses low values for .o and -l symbols + which are not the address. */ + && unrel_val >= pst->unrelocated_text_low ()) + { + stabs_end_psymtab (objfile, partial_symtabs, + pst, psymtab_include_list, + includes_used, symnum * dbx->ctx.symbol_size, + unrel_val > pst->unrelocated_text_high () + ? unrel_val : pst->unrelocated_text_high (), + dependency_list, dependencies_used, + textlow_not_set); + pst = (legacy_psymtab *) 0; + includes_used = 0; + dependencies_used = 0; + dbx->ctx.has_line_numbers = 0; + } + else + past_first_source_file = 1; + } + else + goto record_it; + continue; + + case N_DATA: + goto record_it; + + case N_UNDF | N_EXT: + /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol. + We used to rely on the target to tell us whether it knows + where the symbol has been relocated to, but none of the + target implementations actually provided that operation. + So we just ignore the symbol, the same way we would do if + we had a target-side symbol lookup which returned no match. + + All other symbols (with nlist.n_value == 0), are really + undefined, and so we ignore them too. */ + continue; + + case N_UNDF: + if (dbx->ctx.processing_acc_compilation && nlist.n_strx == 1) + { + /* Deal with relative offsets in the string table + used in ELF+STAB under Solaris. If we want to use the + n_strx field, which contains the name of the file, + we must adjust file_string_table_offset *before* calling + set_namestring(). */ + past_first_source_file = 1; + dbx->ctx.file_string_table_offset = next_file_string_table_offset; + next_file_string_table_offset = + dbx->ctx.file_string_table_offset + nlist.n_value; + if (next_file_string_table_offset < dbx->ctx.file_string_table_offset) + error (_("string table offset backs up at %d"), symnum); + /* FIXME -- replace error() with complaint. */ + continue; + } + continue; + + /* Lots of symbol types we can just ignore. */ + + case N_ABS: + case N_NBDATA: + case N_NBBSS: + continue; + + /* Keep going . . . */ + + /* + * Special symbol types for GNU + */ + case N_INDR: + case N_INDR | N_EXT: + case N_SETA: + case N_SETA | N_EXT: + case N_SETT: + case N_SETT | N_EXT: + case N_SETD: + case N_SETD | N_EXT: + case N_SETB: + case N_SETB | N_EXT: + case N_SETV: + continue; + + /* + * Debugger symbols + */ + + case N_SO: + { + CORE_ADDR valu; + static int prev_so_symnum = -10; + static int first_so_symnum; + const char *p; + static const char *dirname_nso; + int prev_textlow_not_set; + + valu = nlist.n_value; + + prev_textlow_not_set = textlow_not_set; + + /* A zero value is probably an indication for the SunPRO 3.0 + compiler. stabs_end_psymtab explicitly tests for zero, so + don't relocate it. */ + + if (nlist.n_value == 0 + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + textlow_not_set = 1; + valu = 0; + } + else + textlow_not_set = 0; + + past_first_source_file = 1; + + if (prev_so_symnum != symnum - 1) + { /* Here if prev stab wasn't N_SO. */ + first_so_symnum = symnum; + + if (pst) + { + unrelocated_addr unrel_value = unrelocated_addr (valu); + stabs_end_psymtab (objfile, partial_symtabs, + pst, psymtab_include_list, + includes_used, symnum * dbx->ctx.symbol_size, + unrel_value > pst->unrelocated_text_high () + ? unrel_value + : pst->unrelocated_text_high (), + dependency_list, dependencies_used, + prev_textlow_not_set); + pst = (legacy_psymtab *) 0; + includes_used = 0; + dependencies_used = 0; + dbx->ctx.has_line_numbers = 0; + } + } + + prev_so_symnum = symnum; + + /* End the current partial symtab and start a new one. */ + + namestring = set_namestring (objfile, &nlist); + + /* Null name means end of .o file. Don't start a new one. */ + if (*namestring == '\000') + continue; + + /* Some compilers (including gcc) emit a pair of initial N_SOs. + The first one is a directory name; the second the file name. + If pst exists, is empty, and has a filename ending in '/', + we assume the previous N_SO was a directory name. */ + + p = lbasename (namestring); + if (p != namestring && *p == '\000') + { + /* Save the directory name SOs locally, then save it into + the psymtab when it's created below. */ + dirname_nso = namestring; + continue; + } + + /* Some other compilers (C++ ones in particular) emit useless + SOs for non-existent .c files. We ignore all subsequent SOs + that immediately follow the first. */ + + if (!pst) + { + pst = start_psymtab (partial_symtabs, objfile, + namestring, + unrelocated_addr (valu), + first_so_symnum * dbx->ctx.symbol_size); + pst->dirname = dirname_nso; + dirname_nso = NULL; + } + continue; + } + + case N_BINCL: + { + enum language tmp_language; + + /* Add this bincl to the bincl_list for future EXCLs. No + need to save the string; it'll be around until + read_stabs_symtab function returns. */ + + namestring = set_namestring (objfile, &nlist); + 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 + || dbx->ctx.psymtab_language != language_cplus)) + dbx->ctx.psymtab_language = tmp_language; + + if (pst == NULL) + { + /* FIXME: we should not get here without a PST to work on. + Attempt to recover. */ + complaint (_("N_BINCL %s not in entries for " + "any file, at symtab pos %d"), + namestring, symnum); + continue; + } + dbx->ctx.bincl_list.emplace_back (namestring, nlist.n_value, pst); + + /* Mark down an include file in the current psymtab. */ + + goto record_include_file; + } + + case N_SOL: + { + enum language tmp_language; + + /* Mark down an include file in the current psymtab. */ + namestring = set_namestring (objfile, &nlist); + 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 + || dbx->ctx.psymtab_language != language_cplus)) + dbx->ctx.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 && filename_cmp (namestring, pst->filename) == 0) + continue; + { + int i; + + for (i = 0; i < includes_used; i++) + if (filename_cmp (namestring, psymtab_include_list[i]) == 0) + { + i = -1; + break; + } + if (i == -1) + continue; + } + + record_include_file: + + psymtab_include_list[includes_used++] = namestring; + if (includes_used >= includes_allocated) + { + const char **orig = psymtab_include_list; + + psymtab_include_list = (const char **) + alloca ((includes_allocated *= 2) * sizeof (const char *)); + memcpy (psymtab_include_list, orig, + includes_used * sizeof (const char *)); + } + continue; + } + case N_LSYM: /* Typedef or automatic variable. */ + case N_STSYM: /* Data seg var -- static. */ + case N_LCSYM: /* BSS " */ + case N_ROSYM: /* Read-only data seg var -- static. */ + case N_NBSTS: /* Gould nobase. */ + case N_NBLCS: /* symbols. */ + case N_FUN: + case N_GSYM: /* Global (extern) variable; can be + data or bss (sigh FIXME). */ + + /* Following may probably be ignored; I'll leave them here + for now (until I do Pascal and Modula 2 extensions). */ + + case N_PC: /* I may or may not need this; I + suspect not. */ + case N_M2C: /* I suspect that I can ignore this here. */ + case N_SCOPE: /* Same. */ + { + const char *p; + + namestring = set_namestring (objfile, &nlist); + + /* See if this is an end of function stab. */ + if (pst && nlist.n_type == N_FUN && *namestring == '\000') + { + unrelocated_addr valu; + + /* It's value is the size (in bytes) of the function for + function relative stabs, or the address of the function's + end for old style stabs. */ + valu = unrelocated_addr (nlist.n_value + last_function_start); + if (pst->unrelocated_text_high () == unrelocated_addr (0) + || valu > pst->unrelocated_text_high ()) + pst->set_text_high (valu); + break; + } + + p = (char *) strchr (namestring, ':'); + if (!p) + continue; /* Not a debugging symbol. */ + + sym_len = 0; + sym_name = NULL; /* pacify "gcc -Werror" */ + if (dbx->ctx.psymtab_language == language_cplus) + { + std::string name (namestring, p - namestring); + gdb::unique_xmalloc_ptr<char> new_name + = cp_canonicalize_string (name.c_str ()); + if (new_name != nullptr) + { + sym_len = strlen (new_name.get ()); + sym_name = obstack_strdup (&objfile->objfile_obstack, + new_name.get ()); + } + } + else if (dbx->ctx.psymtab_language == language_c) + { + std::string name (namestring, p - namestring); + gdb::unique_xmalloc_ptr<char> new_name + = c_canonicalize_name (name.c_str ()); + if (new_name != nullptr) + { + sym_len = strlen (new_name.get ()); + sym_name = obstack_strdup (&objfile->objfile_obstack, + new_name.get ()); + } + } + + if (sym_len == 0) + { + sym_name = namestring; + sym_len = p - namestring; + } + + /* 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': + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), true, + VAR_DOMAIN, LOC_STATIC, + data_sect_index, + psymbol_placement::STATIC, + unrelocated_addr (nlist.n_value), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("static `%*s' appears to be defined " + "outside of all compilation units"), + sym_len, sym_name); + continue; + + case 'G': + /* The addresses in these entries are reported to be + wrong. See the code that reads 'G's for symtabs. */ + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), true, + VAR_DOMAIN, LOC_STATIC, + data_sect_index, + psymbol_placement::GLOBAL, + unrelocated_addr (nlist.n_value), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("global `%*s' appears to be defined " + "outside of all compilation units"), + sym_len, sym_name); + 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] != ' ')) + { + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), + true, STRUCT_DOMAIN, LOC_TYPEDEF, -1, + psymbol_placement::STATIC, + unrelocated_addr (0), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("enum, struct, or union `%*s' appears " + "to be defined outside of all " + "compilation units"), + sym_len, sym_name); + if (p[2] == 't') + { + /* Also a typedef with the same name. */ + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), + true, VAR_DOMAIN, LOC_TYPEDEF, -1, + psymbol_placement::STATIC, + unrelocated_addr (0), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("typedef `%*s' appears to be defined " + "outside of all compilation units"), + sym_len, sym_name); + p += 1; + } + } + goto check_enum; + + case 't': + if (p != namestring) /* a name is there, not just :T... */ + { + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), + true, VAR_DOMAIN, LOC_TYPEDEF, -1, + psymbol_placement::STATIC, + unrelocated_addr (0), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("typename `%*s' appears to be defined " + "outside of all compilation units"), + sym_len, sym_name); + } + 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 != ',') + { + const 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. */ + if (pst != nullptr) + pst->add_psymbol (std::string_view (p, q - p), true, + VAR_DOMAIN, LOC_CONST, -1, + psymbol_placement::STATIC, + unrelocated_addr (0), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("enum constant `%*s' appears to be defined " + "outside of all compilation units"), + ((int) (q - p)), p); + /* 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. */ + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), true, + VAR_DOMAIN, LOC_CONST, -1, + psymbol_placement::STATIC, + unrelocated_addr (0), + dbx->ctx.psymtab_language, + partial_symtabs, objfile); + else + complaint (_("constant `%*s' appears to be defined " + "outside of all compilation units"), + sym_len, sym_name); + + continue; + + case 'f': + if (! pst) + { + std::string name (namestring, (p - namestring)); + function_outside_compilation_unit_complaint (name.c_str ()); + } + /* Kludges for ELF/STABS with Sun ACC. */ + dbx->ctx.last_function_name = namestring; + /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit + value for the bottom of the text seg in those cases. */ + if (nlist.n_value == 0 + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + bound_minimal_symbol minsym + = find_stab_function (namestring, + pst ? pst->filename : NULL, objfile); + if (minsym.minsym != NULL) + nlist.n_value + = CORE_ADDR (minsym.minsym->unrelocated_address ()); + } + if (pst && textlow_not_set + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + pst->set_text_low (unrelocated_addr (nlist.n_value)); + textlow_not_set = 0; + } + /* End kludge. */ + + /* Keep track of the start of the last function so we + can handle end of function symbols. */ + last_function_start = nlist.n_value; + + /* In reordered executables this function may lie outside + the bounds created by N_SO symbols. If that's the case + use the address of this function as the low bound for + the partial symbol table. */ + if (pst + && (textlow_not_set + || (unrelocated_addr (nlist.n_value) + < pst->unrelocated_text_low () + && (nlist.n_value != 0)))) + { + pst->set_text_low (unrelocated_addr (nlist.n_value)); + textlow_not_set = 0; + } + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), true, + VAR_DOMAIN, LOC_BLOCK, + SECT_OFF_TEXT (objfile), + psymbol_placement::STATIC, + unrelocated_addr (nlist.n_value), + dbx->ctx.psymtab_language, + partial_symtabs, 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) + { + std::string name (namestring, (p - namestring)); + function_outside_compilation_unit_complaint (name.c_str ()); + } + /* Kludges for ELF/STABS with Sun ACC. */ + dbx->ctx.last_function_name = namestring; + /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit + value for the bottom of the text seg in those cases. */ + if (nlist.n_value == 0 + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + bound_minimal_symbol minsym + = find_stab_function (namestring, + pst ? pst->filename : NULL, objfile); + if (minsym.minsym != NULL) + nlist.n_value + = CORE_ADDR (minsym.minsym->unrelocated_address ()); + } + if (pst && textlow_not_set + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + pst->set_text_low (unrelocated_addr (nlist.n_value)); + textlow_not_set = 0; + } + /* End kludge. */ + + /* Keep track of the start of the last function so we + can handle end of function symbols. */ + last_function_start = nlist.n_value; + + /* In reordered executables this function may lie outside + the bounds created by N_SO symbols. If that's the case + use the address of this function as the low bound for + the partial symbol table. */ + if (pst + && (textlow_not_set + || (unrelocated_addr (nlist.n_value) + < pst->unrelocated_text_low () + && (nlist.n_value != 0)))) + { + pst->set_text_low (unrelocated_addr (nlist.n_value)); + textlow_not_set = 0; + } + if (pst != nullptr) + pst->add_psymbol (std::string_view (sym_name, sym_len), true, + VAR_DOMAIN, LOC_BLOCK, + SECT_OFF_TEXT (objfile), + psymbol_placement::GLOBAL, + unrelocated_addr (nlist.n_value), + dbx->ctx.psymtab_language, + partial_symtabs, 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 (_("unknown symbol descriptor `%c'"), + p[1]); + + /* Ignore it; perhaps it is an extension that we don't + know about. */ + continue; + } + } + + case N_EXCL: + + namestring = set_namestring (objfile, &nlist); + + /* Find the corresponding bincl and mark that psymtab on the + psymtab dependency list. */ + { + legacy_psymtab *needed_pst = + find_corresponding_bincl_psymtab (namestring, nlist.n_value, objfile); + + /* If this include file was defined earlier in this file, + leave it alone. */ + if (needed_pst == pst) + continue; + + if (needed_pst) + { + int i; + int found = 0; + + for (i = 0; i < dependencies_used; i++) + if (dependency_list[i] == needed_pst) + { + found = 1; + break; + } + + /* If it's already in the list, skip the rest. */ + if (found) + continue; + + dependency_list[dependencies_used++] = needed_pst; + if (dependencies_used >= dependencies_allocated) + { + legacy_psymtab **orig = dependency_list; + + dependency_list = + (legacy_psymtab **) + alloca ((dependencies_allocated *= 2) + * sizeof (legacy_psymtab *)); + memcpy (dependency_list, orig, + (dependencies_used + * sizeof (legacy_psymtab *))); +#ifdef DEBUG_INFO + gdb_printf (gdb_stderr, + "Had to reallocate " + "dependency list.\n"); + gdb_printf (gdb_stderr, + "New dependencies allocated: %d\n", + dependencies_allocated); +#endif + } + } + } + continue; + + case N_ENDM: + /* Solaris 2 end of module, finish current partial symbol + table. stabs_end_psymtab will set the high text address of + PST to the proper value, which is necessary if a module + compiled without debugging info follows this module. */ + if (pst && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + stabs_end_psymtab (objfile, partial_symtabs, pst, + psymtab_include_list, includes_used, + symnum * dbx->ctx.symbol_size, + (unrelocated_addr) 0, dependency_list, + dependencies_used, textlow_not_set); + pst = (legacy_psymtab *) 0; + includes_used = 0; + dependencies_used = 0; + dbx->ctx.has_line_numbers = 0; + } + continue; + + case N_RBRAC: +#ifdef HANDLE_RBRAC + HANDLE_RBRAC (nlist.n_value); + continue; +#endif + case N_EINCL: + case N_DSLINE: + case N_BSLINE: + case N_SSYM: /* Claim: Structure or union element. + Hopefully, I can ignore this. */ + case N_ENTRY: /* Alternate entry point; can ignore. */ + case N_MAIN: /* Can definitely ignore this. */ + case N_CATCH: /* These are GNU C++ extensions */ + case N_EHDECL: /* that can safely be ignored here. */ + case N_LENG: + case N_BCOMM: + case N_ECOMM: + case N_ECOML: + case N_FNAME: + case N_SLINE: + case N_RSYM: + case N_PSYM: + case N_BNSYM: + case N_ENSYM: + case N_LBRAC: + case N_NSYMS: /* Ultrix 4.0: symbol count */ + case N_DEFD: /* GNU Modula-2 */ + case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ + + case N_OBJ: /* Useless types from Solaris. */ + case N_OPT: + case N_PATCH: + /* These symbols aren't interesting; don't worry about them. */ + continue; + + default: + /* If we haven't found it yet, ignore it. It's probably some + new type we don't know about yet. */ + unknown_symtype_complaint (hex_string (nlist.n_type)); + continue; + } + } + + /* If there's stuff to be cleaned up, clean it up. */ + if (pst) + { + /* Don't set high text address of PST lower than it already + is. */ + unrelocated_addr text_end + = (unrelocated_addr + ((dbx->ctx.lowest_text_address == (unrelocated_addr) -1 + ? text_addr + : CORE_ADDR (dbx->ctx.lowest_text_address)) + + text_size)); + + stabs_end_psymtab (objfile, partial_symtabs, + pst, psymtab_include_list, includes_used, + symnum * dbx->ctx.symbol_size, + (text_end > pst->unrelocated_text_high () + ? text_end : pst->unrelocated_text_high ()), + dependency_list, dependencies_used, textlow_not_set); + } +} + +/* 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. */ + +void +read_stabs_symtab (struct objfile *objfile, symfile_add_flags symfile_flags) +{ + bfd *sym_bfd; + int val; + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + sym_bfd = objfile->obfd.get (); + + stabs_deprecated_warning (); + + /* .o and .nlm files are relocatables with text, data and bss segs based at + 0. This flag disables special (Solaris stabs-in-elf only) fixups for + symbols with a value of 0. */ + + key->ctx.symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC; + + val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); + if (val < 0) + perror_with_name (objfile_name (objfile)); + + key->ctx.symbol_size = DBX_SYMBOL_SIZE (objfile); + key->ctx.symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); + + scoped_free_pendings free_pending; + + minimal_symbol_reader reader (objfile); + + /* Read stabs data from executable file and define symbols. */ + + psymbol_functions *psf = new psymbol_functions (); + psymtab_storage *partial_symtabs = psf->get_partial_symtabs ().get (); + objfile->qf.emplace_front (psf); + read_stabs_symtab_1 (reader, partial_symtabs, objfile); + + /* Install any minimal symbols that have been collected as the current + minimal symbols for this objfile. */ + + reader.install (); +} + +/* Record the namespace that the function defined by SYMBOL was + defined in, if necessary. BLOCK is the associated block; use + OBSTACK for allocation. */ + +static void +cp_set_block_scope (const struct symbol *symbol, + struct block *block, + struct obstack *obstack) +{ + if (symbol->demangled_name () != NULL) + { + /* Try to figure out the appropriate namespace from the + demangled name. */ + + /* FIXME: carlton/2003-04-15: If the function in question is + a method of a class, the name will actually include the + name of the class as well. This should be harmless, but + is a little unfortunate. */ + + const char *name = symbol->demangled_name (); + unsigned int prefix_len = cp_entire_prefix_len (name); + + block->set_scope (obstack_strndup (obstack, name, prefix_len), + obstack); + } +} + +bound_minimal_symbol +find_stab_function (const char *namestring, const char *filename, + struct objfile *objfile) +{ + int n; + + const char *colon = strchr (namestring, ':'); + if (colon == NULL) + n = 0; + else + n = colon - namestring; + + char *p = (char *) alloca (n + 2); + strncpy (p, namestring, n); + p[n] = 0; + + bound_minimal_symbol msym + = lookup_minimal_symbol (current_program_space, p, objfile, filename); + if (msym.minsym == NULL) + { + /* Sun Fortran appends an underscore to the minimal symbol name, + try again with an appended underscore if the minimal symbol + was not found. */ + p[n] = '_'; + p[n + 1] = 0; + msym + = lookup_minimal_symbol (current_program_space, p, objfile, filename); + } + + if (msym.minsym == NULL && filename != NULL) + { + /* Try again without the filename. */ + p[n] = 0; + msym = lookup_minimal_symbol (current_program_space, p, objfile); + } + if (msym.minsym == NULL && filename != NULL) + { + /* And try again for Sun Fortran, but without the filename. */ + p[n] = '_'; + p[n + 1] = 0; + msym = lookup_minimal_symbol (current_program_space, p, objfile); + } + + return msym; +} + +/* Add header file number I for this object file + at the next successive FILENUM. */ + +static void +add_this_object_header_file (int i) +{ + if (n_this_object_header_files == n_allocated_this_object_header_files) + { + n_allocated_this_object_header_files *= 2; + this_object_header_files + = (int *) xrealloc ((char *) this_object_header_files, + n_allocated_this_object_header_files * sizeof (int)); + } + + this_object_header_files[n_this_object_header_files++] = i; +} + +/* Add to this file an "old" header file, one already seen in + a previous object file. NAME is the header file's name. + INSTANCE is its instance code, to select among multiple + symbol tables for the same header file. */ + +static void +add_old_header_file (const char *name, int instance, struct objfile *objfile) +{ + struct header_file *p = HEADER_FILES (objfile); + int i; + + for (i = 0; i < N_HEADER_FILES (objfile); i++) + if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance) + { + add_this_object_header_file (i); + return; + } + repeated_header_complaint (name, symnum); +} + +/* Add to this file a "new" header file: definitions for its types follow. + NAME is the header file's name. + Most often this happens only once for each distinct header file, + but not necessarily. If it happens more than once, INSTANCE has + a different value each time, and references to the header file + use INSTANCE values to select among them. + + dbx output contains "begin" and "end" markers for each new header file, + but at this level we just need to know which files there have been; + so we record the file when its "begin" is seen and ignore the "end". */ + +static void +add_new_header_file (const char *name, int instance, struct objfile *objfile) +{ + int i; + struct header_file *hfile; + + /* Make sure there is room for one more header file. */ + + i = N_ALLOCATED_HEADER_FILES (objfile); + + if (N_HEADER_FILES (objfile) == i) + { + if (i == 0) + { + N_ALLOCATED_HEADER_FILES (objfile) = 10; + HEADER_FILES (objfile) = (struct header_file *) + xmalloc (10 * sizeof (struct header_file)); + } + else + { + i *= 2; + N_ALLOCATED_HEADER_FILES (objfile) = i; + HEADER_FILES (objfile) = (struct header_file *) + xrealloc ((char *) HEADER_FILES (objfile), + (i * sizeof (struct header_file))); + } + } + + /* Create an entry for this header file. */ + + i = N_HEADER_FILES (objfile)++; + hfile = HEADER_FILES (objfile) + i; + hfile->name = xstrdup (name); + hfile->instance = instance; + hfile->length = 10; + hfile->vector = XCNEWVEC (struct type *, 10); + + add_this_object_header_file (i); +} + +/* See stabsread.h. */ + +void +process_one_symbol (int type, int desc, CORE_ADDR valu, const char *name, + const section_offsets §ion_offsets, + struct objfile *objfile, enum language language) +{ + struct gdbarch *gdbarch = objfile->arch (); + struct context_stack *newobj; + struct context_stack cstk; + /* This remembers the address of the start of a function. It is + used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries + are relative to the current function's start address. On systems + other than Solaris 2, this just holds the SECT_OFF_TEXT value, + and is used to relocate these symbol types rather than + SECTION_OFFSETS. */ + static CORE_ADDR function_start_offset; + + /* This holds the address of the start of a function, without the + system peculiarities of function_start_offset. */ + static CORE_ADDR last_function_start; + + /* If this is nonzero, we've seen an N_SLINE since the start of the + current function. We use this to tell us to move the first sline + to the beginning of the function regardless of what its given + value is. */ + static int sline_found_in_function = 1; + + /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this + source file. Used to detect the SunPRO solaris compiler. */ + static int n_opt_found; + + /* The section index for this symbol. */ + int section_index = -1; + + struct dbx_symfile_info *key = dbx_objfile_data_key.get (objfile); + + /* Something is wrong if we see real data before seeing a source + file name. */ + + if (get_last_source_file () == NULL && type != (unsigned char) N_SO) + { + /* Ignore any symbols which appear before an N_SO symbol. + Currently no one puts symbols there, but we should deal + gracefully with the case. A complain()t might be in order, + but this should not be an error (). */ + return; + } + + switch (type) + { + case N_FUN: + case N_FNAME: + + if (*name == '\000') + { + /* This N_FUN marks the end of a function. This closes off + the current block. */ + struct block *block; + + if (outermost_context_p ()) + { + lbrac_mismatch_complaint (symnum); + break; + } + + /* The following check is added before recording line 0 at + end of function so as to handle hand-generated stabs + which may have an N_FUN stabs at the end of the function, + but no N_SLINE stabs. */ + if (sline_found_in_function) + { + CORE_ADDR addr = last_function_start + valu; + + record_line + (get_current_subfile (), 0, + unrelocated_addr (gdbarch_addr_bits_remove (gdbarch, addr) + - objfile->text_section_offset ())); + } + + within_function = 0; + cstk = pop_context (); + + /* Make a block for the local symbols within. */ + block = finish_block (cstk.name, + cstk.old_blocks, NULL, + cstk.start_addr, cstk.start_addr + valu); + + /* For C++, set the block's scope. */ + if (cstk.name->language () == language_cplus) + cp_set_block_scope (cstk.name, block, &objfile->objfile_obstack); + + /* May be switching to an assembler file which may not be using + block relative stabs, so reset the offset. */ + function_start_offset = 0; + + break; + } + + sline_found_in_function = 0; + + /* Relocate for dynamic loading. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + valu = gdbarch_addr_bits_remove (gdbarch, valu); + last_function_start = valu; + + goto define_a_symbol; + + case N_LBRAC: + /* This "symbol" just indicates the start of an inner lexical + context within a function. */ + + /* Ignore extra outermost context from SunPRO cc and acc. */ + if (n_opt_found && desc == 1) + break; + + valu += function_start_offset; + + push_context (desc, valu); + break; + + case N_RBRAC: + /* This "symbol" just indicates the end of an inner lexical + context that was started with N_LBRAC. */ + + /* Ignore extra outermost context from SunPRO cc and acc. */ + if (n_opt_found && desc == 1) + break; + + valu += function_start_offset; + + if (outermost_context_p ()) + { + lbrac_mismatch_complaint (symnum); + break; + } + + cstk = pop_context (); + if (desc != cstk.depth) + lbrac_mismatch_complaint (symnum); + + if (*get_local_symbols () != NULL) + { + /* GCC development snapshots from March to December of + 2000 would output N_LSYM entries after N_LBRAC + entries. As a consequence, these symbols are simply + discarded. Complain if this is the case. */ + complaint (_("misplaced N_LBRAC entry; discarding local " + "symbols which have no enclosing block")); + } + *get_local_symbols () = cstk.locals; + + if (get_context_stack_depth () > 1) + { + /* This is not the outermost LBRAC...RBRAC pair in the + function, its local symbols preceded it, and are the ones + just recovered from the context stack. Define the block + for them (but don't bother if the block contains no + symbols. Should we complain on blocks without symbols? + I can't think of any useful purpose for them). */ + if (*get_local_symbols () != NULL) + { + /* Muzzle a compiler bug that makes end < start. + + ??? Which compilers? Is this ever harmful?. */ + if (cstk.start_addr > valu) + { + complaint (_("block start larger than block end")); + cstk.start_addr = valu; + } + /* Make a block for the local symbols within. */ + finish_block (0, cstk.old_blocks, NULL, + cstk.start_addr, valu); + } + } + else + { + /* This is the outermost LBRAC...RBRAC pair. There is no + need to do anything; leave the symbols that preceded it + to be attached to the function's own block. We need to + indicate that we just moved outside of the function. */ + within_function = 0; + } + + break; + + case N_FN: + case N_FN_SEQ: + /* This kind of symbol indicates the start of an object file. + Relocate for dynamic loading. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + break; + + case N_SO: + /* This type of symbol indicates the start of data for one + source file. Finish the symbol table of the previous source + file (if any) and start accumulating a new symbol table. + Relocate for dynamic loading. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + + n_opt_found = 0; + + if (get_last_source_file ()) + { + /* Check if previous symbol was also an N_SO (with some + sanity checks). If so, that one was actually the + directory name, and the current one is the real file + name. Patch things up. */ + if (previous_stab_code == (unsigned char) N_SO) + { + patch_subfile_names (get_current_subfile (), name); + break; /* Ignore repeated SOs. */ + } + end_compunit_symtab (valu); + end_stabs (); + } + + /* Null name means this just marks the end of text for this .o + file. Don't start a new symtab in this case. */ + if (*name == '\000') + break; + + function_start_offset = 0; + + start_stabs (); + start_compunit_symtab (objfile, name, NULL, valu, language); + record_debugformat ("stabs"); + break; + + case N_SOL: + /* This type of symbol indicates the start of data for a + sub-source-file, one whose contents were copied or included + in the compilation of the main source file (whose name was + given in the N_SO symbol). Relocate for dynamic loading. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + start_subfile (name); + break; + + case N_BINCL: + push_subfile (); + add_new_header_file (name, valu, objfile); + start_subfile (name); + break; + + case N_EINCL: + start_subfile (pop_subfile ()); + break; + + case N_EXCL: + add_old_header_file (name, valu, objfile); + break; + + case N_SLINE: + /* This type of "symbol" really just records one line-number -- + core-address correspondence. Enter it in the line list for + this symbol table. */ + + /* Relocate for dynamic loading and for ELF acc + function-relative symbols. */ + valu += function_start_offset; + + /* GCC 2.95.3 emits the first N_SLINE stab somewhere in the + middle of the prologue instead of right at the start of the + function. To deal with this we record the address for the + first N_SLINE stab to be the start of the function instead of + the listed location. We really shouldn't to this. When + compiling with optimization, this first N_SLINE stab might be + optimized away. Other (non-GCC) compilers don't emit this + stab at all. There is no real harm in having an extra + numbered line, although it can be a bit annoying for the + user. However, it totally screws up our testsuite. + + So for now, keep adjusting the address of the first N_SLINE + stab, but only for code compiled with GCC. */ + + if (within_function && sline_found_in_function == 0) + { + CORE_ADDR addr = processing_gcc_compilation == 2 ? + last_function_start : valu; + + record_line + (get_current_subfile (), desc, + unrelocated_addr (gdbarch_addr_bits_remove (gdbarch, addr) + - objfile->text_section_offset ())); + sline_found_in_function = 1; + } + else + record_line + (get_current_subfile (), desc, + unrelocated_addr (gdbarch_addr_bits_remove (gdbarch, valu) + - objfile->text_section_offset ())); + break; + + case N_BCOMM: + common_block_start (name, objfile); + break; + + case N_ECOMM: + 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. */ + + case N_STSYM: /* Static symbol in data segment. */ + case N_LCSYM: /* Static symbol in BSS segment. */ + case N_ROSYM: /* Static symbol in read-only data segment. */ + /* HORRID HACK DEPT. However, it's Sun's furgin' fault. + Solaris 2'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). */ + { + const char *p; + + /* Normal object file and NLMs have non-zero text seg offsets, + but don't need their static syms offset in this fashion. + XXX - This is really a crock that should be fixed in the + solib handling code so that I don't have to work around it + here. */ + + if (!key->ctx.symfile_relocatable) + { + p = strchr (name, ':'); + if (p != 0 && p[1] == 'S') + { + /* The linker relocated it. We don't want to add a + Sun-stabs Tfoo.foo-like offset, but we *do* + want to add whatever solib.c passed to + symbol_file_add as addr (this is known to affect + SunOS 4, and I suspect ELF too). Since there is no + Ttext.text symbol, we can get addr from the text offset. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + goto define_a_symbol; + } + } + /* Since it's not the kludge case, re-dispatch to the right + handler. */ + switch (type) + { + case N_STSYM: + goto case_N_STSYM; + case N_LCSYM: + goto case_N_LCSYM; + case N_ROSYM: + goto case_N_ROSYM; + default: + internal_error (_("failed internal consistency check")); + } + } + + case_N_STSYM: /* Static symbol in data segment. */ + case N_DSLINE: /* Source line number, data segment. */ + section_index = SECT_OFF_DATA (objfile); + valu += section_offsets[SECT_OFF_DATA (objfile)]; + goto define_a_symbol; + + case_N_LCSYM: /* Static symbol in BSS segment. */ + case N_BSLINE: /* Source line number, BSS segment. */ + /* N_BROWS: overlaps with N_BSLINE. */ + section_index = SECT_OFF_BSS (objfile); + valu += section_offsets[SECT_OFF_BSS (objfile)]; + goto define_a_symbol; + + case_N_ROSYM: /* Static symbol in read-only data segment. */ + section_index = SECT_OFF_RODATA (objfile); + valu += section_offsets[SECT_OFF_RODATA (objfile)]; + goto define_a_symbol; + + case N_ENTRY: /* Alternate entry point. */ + /* Relocate for dynamic loading. */ + section_index = SECT_OFF_TEXT (objfile); + valu += section_offsets[SECT_OFF_TEXT (objfile)]; + goto define_a_symbol; + + /* The following symbol types we don't know how to process. + Handle them in a "default" way, but complain to people who + care. */ + default: + case N_CATCH: /* Exception handler catcher. */ + case N_EHDECL: /* Exception handler name. */ + case N_PC: /* Global symbol in Pascal. */ + case N_M2C: /* Modula-2 compilation unit. */ + /* N_MOD2: overlaps with N_EHDECL. */ + case N_SCOPE: /* Modula-2 scope information. */ + case N_ECOML: /* End common (local name). */ + case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ + case N_NBDATA: + case N_NBBSS: + case N_NBSTS: + case N_NBLCS: + unknown_symtype_complaint (hex_string (type)); + + define_a_symbol: + [[fallthrough]]; + /* These symbol types don't need the address field relocated, + since it is either unused, or is absolute. */ + case N_GSYM: /* Global variable. */ + case N_NSYMS: /* Number of symbols (Ultrix). */ + case N_NOMAP: /* No map? (Ultrix). */ + case N_RSYM: /* Register variable. */ + case N_DEFD: /* Modula-2 GNU module dependency. */ + case N_SSYM: /* Struct or union element. */ + case N_LSYM: /* Local symbol in stack. */ + case N_PSYM: /* Parameter variable. */ + case N_LENG: /* Length of preceding symbol type. */ + if (name) + { + int deftype; + const char *colon_pos = strchr (name, ':'); + + if (colon_pos == NULL) + deftype = '\0'; + else + deftype = colon_pos[1]; + + switch (deftype) + { + case 'f': + case 'F': + /* Deal with the SunPRO 3.0 compiler which omits the + address from N_FUN symbols. */ + if (type == N_FUN + && valu == section_offsets[SECT_OFF_TEXT (objfile)] + && gdbarch_sofun_address_maybe_missing (gdbarch)) + { + bound_minimal_symbol minsym + = find_stab_function (name, get_last_source_file (), + objfile); + if (minsym.minsym != NULL) + valu = minsym.value_address (); + } + + /* These addresses are absolute. */ + function_start_offset = valu; + + within_function = 1; + + if (get_context_stack_depth () > 1) + { + complaint (_("unmatched N_LBRAC before symtab pos %d"), + symnum); + break; + } + + if (!outermost_context_p ()) + { + struct block *block; + + cstk = pop_context (); + /* Make a block for the local symbols within. */ + block = finish_block (cstk.name, + cstk.old_blocks, NULL, + cstk.start_addr, valu); + + /* For C++, set the block's scope. */ + if (cstk.name->language () == language_cplus) + cp_set_block_scope (cstk.name, block, + &objfile->objfile_obstack); + } + + newobj = push_context (0, valu); + newobj->name = define_symbol (valu, name, desc, type, objfile); + if (newobj->name != nullptr) + newobj->name->set_section_index (section_index); + break; + + default: + { + struct symbol *sym = define_symbol (valu, name, desc, type, + objfile); + if (sym != nullptr) + sym->set_section_index (section_index); + } + break; + } + } + break; + + /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it + for a bunch of other flags, too. Someday we may parse their + flags; for now we ignore theirs and hope they'll ignore ours. */ + case N_OPT: /* Solaris 2: Compiler options. */ + if (name) + { + if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0) + { + processing_gcc_compilation = 2; + } + else + n_opt_found = 1; + } + break; + + case N_MAIN: /* Name of main routine. */ + /* FIXME: If one has a symbol file with N_MAIN and then replaces + it with a symbol file with "main" and without N_MAIN. I'm + not sure exactly what rule to follow but probably something + like: N_MAIN takes precedence over "main" no matter what + objfile it is in; If there is more than one N_MAIN, choose + the one in the symfile_objfile; If there is more than one + N_MAIN within a given objfile, complain() and choose + arbitrarily. (kingdon) */ + if (name != NULL) + set_objfile_main_name (objfile, name, language_unknown); + break; + + /* The following symbol types can be ignored. */ + case N_OBJ: /* Solaris 2: Object file dir and name. */ + case N_PATCH: /* Solaris 2: Patch Run Time Checker. */ + /* N_UNDF: Solaris 2: File separator mark. */ + /* N_UNDF: -- we will never encounter it, since we only process + one file's symbols at once. */ + case N_ENDM: /* Solaris 2: End of module. */ + case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ + break; + } + + /* '#' is a GNU C extension to allow one symbol to refer to another + related symbol. + + Generally this is used so that an alias can refer to its main + symbol. */ + gdb_assert (name); + if (name[0] == '#') + { + /* Initialize symbol reference names and determine if this is a + definition. If a symbol reference is being defined, go ahead + and add it. Otherwise, just return. */ + + const char *s = name; + int refnum; + + /* If this stab defines a new reference ID that is not on the + reference list, then put it on the reference list. + + We go ahead and advance NAME past the reference, even though + it is not strictly necessary at this time. */ + refnum = symbol_reference_defined (&s); + if (refnum >= 0) + if (!ref_search (refnum)) + ref_add (refnum, 0, name, valu); + name = s; + } + + previous_stab_code = type; +} + #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */ #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */ #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */ @@ -1024,7 +3511,7 @@ define_symbol (CORE_ADDR valu, const char *string, int desc, int type, sym->set_aclass_index (LOC_STATIC); sym->set_domain (VAR_DOMAIN); /* Don't add symbol references to global_sym_chain. - Symbol references don't have valid names and wont't match up with + Symbol references don't have valid names and won't match up with minimal symbols when the global_sym_chain is relocated. We'll fixup symbol references when we fixup the defining symbol. */ if (sym->linkage_name () && sym->linkage_name ()[0] != '#') @@ -2289,7 +4776,7 @@ read_member_functions (struct stab_field_info *fip, const char **pp, if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2])) { - /* This is a completely wierd case. In order to stuff in the + /* This is a completely weird case. In order to stuff in the names that might contain colons (the usual name delimiter), Mike Tiemann defined a different name format which is signalled if the identifier is "op$". In that case, the @@ -2420,7 +4907,7 @@ read_member_functions (struct stab_field_info *fip, const char **pp, int nbits; /* virtual member function, followed by index. The sign bit is set to distinguish pointers-to-methods - from virtual function indicies. Since the array is + from virtual function indices. Since the array is in words, the quantity must be shifted left by 1 on 16 bit machine, and by 2 on 32 bit machine, forcing the sign bit out, and usable as a valid index into @@ -3911,7 +6398,7 @@ read_huge_number (const char **pp, int end, int *bits, } /* -0x7f is the same as 0x80. So deal with it by adding one to - the number of bits. Two's complement represention octals + the number of bits. Two's complement representation octals can't have a '-' in front. */ if (sign == -1 && !twos_complement_representation) ++nbits; @@ -4713,9 +7200,7 @@ hashname (const char *name) /* Initializer for this module. */ -void _initialize_stabsread (); -void -_initialize_stabsread () +INIT_GDB_FILE (stabsread) { undef_types_allocated = 20; undef_types_length = 0; |