diff options
Diffstat (limited to 'gdb/dbxread.c')
| -rw-r--r-- | gdb/dbxread.c | 2895 |
1 files changed, 4 insertions, 2891 deletions
diff --git a/gdb/dbxread.c b/gdb/dbxread.c index 830dd1c..1b29d6e 100644 --- a/gdb/dbxread.c +++ b/gdb/dbxread.c @@ -54,228 +54,15 @@ #include "aout/aout64.h" #include "aout/stab_gnu.h" +/* Required for the following registry. */ +#include "gdb-stabs.h" -/* Key for dbx-associated data. */ - -const registry<objfile>::key<dbx_symfile_info> dbx_objfile_data_key; - -/* We put a pointer to this structure in the read_symtab_private field - of the psymtab. */ - -struct symloc - { - /* Offset within the file symbol table of first local symbol for this - file. */ - - int ldsymoff; - - /* Length (in bytes) of the section of the symbol table devoted to - this file's symbols (actually, the section bracketed may contain - more than just this file's symbols). If ldsymlen is 0, the only - reason for this thing's existence is the dependency list. Nothing - else will happen when it is read in. */ - - int ldsymlen; - - /* The size of each symbol in the symbol file (in external form). */ - - int symbol_size; - - /* Further information needed to locate the symbols if they are in - an ELF file. */ - - int symbol_offset; - int string_offset; - int file_string_offset; - enum language pst_language; - }; - -#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) -#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) -#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) -#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) -#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) -#define STRING_OFFSET(p) (SYMLOC(p)->string_offset) -#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) -#define PST_LANGUAGE(p) (SYMLOC(p)->pst_language) - -/* The objfile we are currently reading. */ - -static struct objfile *dbxread_objfile; - -/* Remember what we deduced to be the source language of this psymtab. */ - -static enum language psymtab_language = language_unknown; - -/* The BFD for this file -- implicit parameter to next_symbol_text. */ - -static bfd *symfile_bfd; - -/* The size of each symbol in the symbol file (in external form). - This is set by dbx_symfile_read when building psymtabs, and by - dbx_psymtab_to_symtab when building symtabs. */ - -static unsigned symbol_size; - -/* This is the offset of the symbol table in the executable file. */ - -static unsigned symbol_table_offset; - -/* This is the offset of the string table in the executable file. */ - -static unsigned string_table_offset; - -/* For elf+stab executables, the n_strx field is not a simple index - into the string table. Instead, each .o file has a base offset in - the string table, and the associated symbols contain offsets from - this base. The following two variables contain the base offset for - the current and next .o files. */ - -static unsigned int file_string_table_offset; -static unsigned int next_file_string_table_offset; - -/* .o and NLM files contain unrelocated addresses which are based at - 0. When non-zero, this flag disables some of the special cases for - Solaris elf+stab text addresses at location 0. */ - -static int symfile_relocatable = 0; - -/* When set, we are processing a .o file compiled by sun acc. This is - misnamed; it refers to all stabs-in-elf implementations which use - N_UNDF the way Sun does, including Solaris gcc. Hopefully all - stabs-in-elf implementations ever invented will choose to be - compatible. */ - -static unsigned char processing_acc_compilation; - -/* The lowest text address we have yet encountered. This is needed - because in an a.out file, there is no header field which tells us - what address the program is actually going to be loaded at, so we - need to make guesses based on the symbols (which *are* relocated to - reflect the address it will be loaded at). */ - -static unrelocated_addr lowest_text_address; - -/* Non-zero if there is any line number info in the objfile. Prevents - dbx_end_psymtab from discarding an otherwise empty psymtab. */ -static int has_line_numbers; - -/* Complaints about the symbols we have encountered. */ - -static void -unknown_symtype_complaint (const char *arg1) -{ - complaint (_("unknown symbol type %s"), arg1); -} - -static void -lbrac_mismatch_complaint (int arg1) -{ - complaint (_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1); -} - -static void -repeated_header_complaint (const char *arg1, int arg2) -{ - complaint (_("\"repeated\" header file %s not " - "previously seen, at symtab pos %d"), - arg1, arg2); -} - -/* find_text_range --- find start and end of loadable code sections - - The find_text_range function finds the shortest address range that - encloses all sections containing executable code, and stores it in - objfile's text_addr and text_size members. - - dbx_symfile_read will use this to finish off the partial symbol - table, in some cases. */ - -static void -find_text_range (bfd * sym_bfd, struct objfile *objfile) -{ - asection *sec; - int found_any = 0; - CORE_ADDR start = 0; - CORE_ADDR end = 0; - - for (sec = sym_bfd->sections; sec; sec = sec->next) - if (bfd_section_flags (sec) & SEC_CODE) - { - CORE_ADDR sec_start = bfd_section_vma (sec); - CORE_ADDR sec_end = sec_start + bfd_section_size (sec); - - if (found_any) - { - if (sec_start < start) - start = sec_start; - if (sec_end > end) - end = sec_end; - } - else - { - start = sec_start; - end = sec_end; - } - - found_any = 1; - } - - if (!found_any) - error (_("Can't find any code sections in symbol file")); - - DBX_TEXT_ADDR (objfile) = start; - DBX_TEXT_SIZE (objfile) = end - start; -} - - - -/* During initial symbol readin, we need to have a structure to keep - track of which psymtabs have which bincls in them. This structure - is used during readin to setup the list of dependencies within each - partial symbol table. */ - -struct header_file_location -{ - header_file_location (const char *name_, int instance_, - legacy_psymtab *pst_) - : name (name_), - instance (instance_), - pst (pst_) - { - } - - const char *name; /* Name of header file */ - int instance; /* See above */ - legacy_psymtab *pst; /* Partial symtab that has the - BINCL/EINCL defs for this file. */ -}; - -/* The list of bincls. */ -static std::vector<struct header_file_location> *bincl_list; /* Local function prototypes. */ -static void read_ofile_symtab (struct objfile *, legacy_psymtab *); - -static void dbx_read_symtab (legacy_psymtab *self, - struct objfile *objfile); - -static void dbx_expand_psymtab (legacy_psymtab *, struct objfile *); - -static void read_dbx_symtab (minimal_symbol_reader &, psymtab_storage *, - struct objfile *); - -static legacy_psymtab *find_corresponding_bincl_psymtab (const char *, - int); - -static const char *dbx_next_symbol_text (struct objfile *); - -static void fill_symbuf (bfd *); - static void dbx_symfile_init (struct objfile *); static void dbx_new_init (struct objfile *); @@ -284,128 +71,6 @@ static void dbx_symfile_read (struct objfile *, symfile_add_flags); static void dbx_symfile_finish (struct objfile *); -static void record_minimal_symbol (minimal_symbol_reader &, - const char *, unrelocated_addr, int, - struct objfile *); - -static void add_new_header_file (const char *, int); - -static void add_old_header_file (const char *, int); - -static void add_this_object_header_file (int); - -static legacy_psymtab *start_psymtab (psymtab_storage *, struct objfile *, - const char *, unrelocated_addr, int); - -/* 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); -} - -/* 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 header_file *p = HEADER_FILES (dbxread_objfile); - int i; - - for (i = 0; i < N_HEADER_FILES (dbxread_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) -{ - int i; - struct header_file *hfile; - - /* Make sure there is room for one more header file. */ - - i = N_ALLOCATED_HEADER_FILES (dbxread_objfile); - - if (N_HEADER_FILES (dbxread_objfile) == i) - { - if (i == 0) - { - N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10; - HEADER_FILES (dbxread_objfile) = (struct header_file *) - xmalloc (10 * sizeof (struct header_file)); - } - else - { - i *= 2; - N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i; - HEADER_FILES (dbxread_objfile) = (struct header_file *) - xrealloc ((char *) HEADER_FILES (dbxread_objfile), - (i * sizeof (struct header_file))); - } - } - - /* Create an entry for this header file. */ - - i = N_HEADER_FILES (dbxread_objfile)++; - hfile = HEADER_FILES (dbxread_objfile) + i; - hfile->name = xstrdup (name); - hfile->instance = instance; - hfile->length = 10; - hfile->vector = XCNEWVEC (struct type *, 10); - - add_this_object_header_file (i); -} #if 0 static struct type ** @@ -425,91 +90,6 @@ explicit_lookup_type (int real_filenum, int index) } #endif -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; - - 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 < lowest_text_address) - lowest_text_address = address; - - reader.record_with_info (name, address, ms_type, section); -} - /* 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", @@ -518,39 +98,7 @@ record_minimal_symbol (minimal_symbol_reader &reader, static void dbx_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) { - bfd *sym_bfd; - int val; - - sym_bfd = objfile->obfd.get (); - - /* .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. */ - - 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)); - - symbol_size = DBX_SYMBOL_SIZE (objfile); - 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_dbx_symtab (reader, partial_symtabs, objfile); - - /* Install any minimal symbols that have been collected as the current - minimal symbols for this objfile. */ - - reader.install (); + read_stabs_symtab (objfile, symfile_flags); } /* Initialize anything that needs initializing when a completely new @@ -699,2445 +247,10 @@ dbx_symfile_finish (struct objfile *objfile) free_header_files (); } -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); - } -} - - - -/* Buffer for reading the symbol table entries. */ -static struct external_nlist symbuf[4096]; -static int symbuf_idx; -static int symbuf_end; - -/* Name of last function encountered. Used in Solaris to approximate - object file boundaries. */ -static const char *last_function_name; - -/* The address in memory of the string table of the object file we are - reading (which might not be the "main" object file, but might be a - shared library or some other dynamically loaded thing). This is - set by read_dbx_symtab when building psymtabs, and by - read_ofile_symtab when building symtabs, and is used only by - next_symbol_text. FIXME: If that is true, we don't need it when - building psymtabs, right? */ -static char *stringtab_global; - -/* These variables are used to control fill_symbuf when the stabs - symbols are not contiguous (as may be the case when a COFF file is - linked using --split-by-reloc). */ -static const std::vector<asection *> *symbuf_sections; -static size_t sect_idx; -static unsigned int symbuf_left; -static unsigned int symbuf_read; - -/* This variable stores a global stabs buffer, if we read stabs into - memory in one chunk in order to process relocations. */ -static bfd_byte *stabs_data; - -/* 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) -{ - unsigned int count; - int nbytes; - - if (stabs_data) - { - nbytes = sizeof (symbuf); - if (nbytes > symbuf_left) - nbytes = symbuf_left; - memcpy (symbuf, stabs_data + symbuf_read, nbytes); - } - else if (symbuf_sections == NULL) - { - count = sizeof (symbuf); - nbytes = bfd_read (symbuf, count, sym_bfd); - } - else - { - if (symbuf_left <= 0) - { - file_ptr filepos = (*symbuf_sections)[sect_idx]->filepos; - - if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0) - perror_with_name (bfd_get_filename (sym_bfd)); - symbuf_left = bfd_section_size ((*symbuf_sections)[sect_idx]); - symbol_table_offset = filepos - symbuf_read; - ++sect_idx; - } - - count = 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 / symbol_size; - symbuf_idx = 0; - symbuf_left -= nbytes; - symbuf_read += nbytes; -} - -static void -stabs_seek (int sym_offset) -{ - if (stabs_data) - { - symbuf_read += sym_offset; - symbuf_left -= sym_offset; - } - else - if (bfd_seek (symfile_bfd, sym_offset, SEEK_CUR) != 0) - perror_with_name (bfd_get_filename (symfile_bfd)); -} - -#define INTERNALIZE_SYMBOL(intern, extern, abfd) \ - { \ - (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \ - (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \ - (intern).n_other = 0; \ - (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \ - if (bfd_get_sign_extend_vma (abfd)) \ - (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \ - else \ - (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \ - } - -/* 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; - - if (symbuf_idx == symbuf_end) - fill_symbuf (symfile_bfd); - - symnum++; - INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd); - OBJSTAT (objfile, n_stabs++); - - symbuf_idx++; - - return nlist.n_strx + stringtab_global + file_string_table_offset; -} - - -/* 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) -{ - for (const header_file_location &bincl : *bincl_list) - if (bincl.instance == instance - && strcmp (name, bincl.name) == 0) - return bincl.pst; - - repeated_header_complaint (name, symnum); - return (legacy_psymtab *) 0; -} - -/* 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; - - if (nlist->n_strx + file_string_table_offset - >= DBX_STRINGTAB_SIZE (objfile) - || nlist->n_strx + 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 + file_string_table_offset - + DBX_STRINGTAB (objfile)); - return namestring; -} - -static struct bound_minimal_symbol -find_stab_function (const char *namestring, const char *filename, - struct objfile *objfile) -{ - struct bound_minimal_symbol msym; - 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; - - msym = lookup_minimal_symbol (p, filename, objfile); - 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 (p, filename, objfile); - } - - if (msym.minsym == NULL && filename != NULL) - { - /* Try again without the filename. */ - p[n] = 0; - msym = lookup_minimal_symbol (p, NULL, 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 (p, NULL, objfile); - } - - return msym; -} - -static void -function_outside_compilation_unit_complaint (const char *arg1) -{ - complaint (_("function `%s' appears to be defined " - "outside of all compilation units"), - arg1); -} - -/* Setup partial_symtab's describing each source file for which - debugging information is available. */ - -static void -read_dbx_symtab (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; - - 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. */ - file_string_table_offset = 0; - next_file_string_table_offset = 0; - - 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 (&bincl_list, &bincl_storage); - - set_last_source_file (NULL); - - lowest_text_address = (unrelocated_addr) -1; - - symfile_bfd = objfile->obfd.get (); /* For next_text_symbol. */ - abfd = objfile->obfd.get (); - symbuf_end = symbuf_idx = 0; - next_symbol_text_func = dbx_next_symbol_text; - textlow_not_set = 1; - 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 interruptable. */ - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - bufp = &symbuf[symbuf_idx++]; - - /* - * Special case to speed up readin. - */ - if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE) - { - 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 ()) - { - dbx_end_psymtab (objfile, partial_symtabs, - pst, psymtab_include_list, - includes_used, symnum * 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; - 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 (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; - file_string_table_offset = next_file_string_table_offset; - next_file_string_table_offset = - file_string_table_offset + nlist.n_value; - if (next_file_string_table_offset < 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. dbx_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); - dbx_end_psymtab (objfile, partial_symtabs, - pst, psymtab_include_list, - includes_used, symnum * 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; - 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-existant .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 * 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_dbx_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 - || psymtab_language != language_cplus)) - 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; - } - 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 - || psymtab_language != language_cplus)) - psymtab_language = tmp_language; - - /* In C++, one may expect the same filename to come round many - times, when code is coming alternately from the main file - and from inline functions in other files. So I check to see - if this is a file we've seen before -- either the main - source file, or a previously included file. - - This seems to be a lot of time to be spending on N_SOL, but - things like "break c-exp.y:435" need to work (I - suppose the psymtab_include_list could be hashed or put - in a binary tree, if profiling shows this is a major hog). */ - if (pst && 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 (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 (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), - 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), - 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), - 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), - 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), - 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), - 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), - 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. */ - 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)) - { - struct 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), - 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. */ - 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)) - { - struct 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), - 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); - - /* 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. dbx_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)) - { - dbx_end_psymtab (objfile, partial_symtabs, pst, - psymtab_include_list, includes_used, - symnum * symbol_size, - (unrelocated_addr) 0, dependency_list, - dependencies_used, textlow_not_set); - pst = (legacy_psymtab *) 0; - includes_used = 0; - dependencies_used = 0; - 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 - ((lowest_text_address == (unrelocated_addr) -1 - ? text_addr - : CORE_ADDR (lowest_text_address)) - + text_size)); - - dbx_end_psymtab (objfile, partial_symtabs, - pst, psymtab_include_list, includes_used, - symnum * symbol_size, - (text_end > pst->unrelocated_text_high () - ? text_end : pst->unrelocated_text_high ()), - dependency_list, dependencies_used, textlow_not_set); - } -} - -/* 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); - - result->read_symtab_private = - XOBNEW (&objfile->objfile_obstack, struct symloc); - LDSYMOFF (result) = ldsymoff; - result->legacy_read_symtab = dbx_read_symtab; - result->legacy_expand_psymtab = dbx_expand_psymtab; - SYMBOL_SIZE (result) = symbol_size; - SYMBOL_OFFSET (result) = symbol_table_offset; - STRING_OFFSET (result) = string_table_offset; - FILE_STRING_OFFSET (result) = file_string_table_offset; - - /* Deduce the source language from the filename for this psymtab. */ - psymtab_language = deduce_language_from_filename (filename); - PST_LANGUAGE (result) = psymtab_language; - - return result; -} - -/* 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 * -dbx_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 (); - - 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 && last_function_name - && gdbarch_sofun_address_maybe_missing (gdbarch)) - { - int n; - struct bound_minimal_symbol minsym; - - const char *colon = strchr (last_function_name, ':'); - if (colon == NULL) - n = 0; - else - n = colon - last_function_name; - char *p = (char *) alloca (n + 2); - strncpy (p, last_function_name, n); - p[n] = 0; - - minsym = lookup_minimal_symbol (p, pst->filename, objfile); - 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 (p, pst->filename, objfile); - } - - if (minsym.minsym) - pst->set_text_high - (unrelocated_addr (CORE_ADDR (minsym.minsym->unrelocated_address ()) - + minsym.minsym->size ())); - - 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 () - && 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; -} -static void -dbx_expand_psymtab (legacy_psymtab *pst, struct objfile *objfile) -{ - gdb_assert (!pst->readin); - - /* 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; - file_string_table_offset = FILE_STRING_OFFSET (pst); - 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; -} - -/* 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 -dbx_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; - - { - scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data); - gdb::unique_xmalloc_ptr<gdb_byte> data_holder; - if (DBX_STAB_SECTION (objfile)) - { - stabs_data - = symfile_relocate_debug_section (objfile, - DBX_STAB_SECTION (objfile), - NULL); - data_holder.reset (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); - } -} - -/* 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 */ - - 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; - - dbxread_objfile = objfile; - - stringtab_global = DBX_STRINGTAB (objfile); - set_last_source_file (NULL); - - abfd = objfile->obfd.get (); - symfile_bfd = objfile->obfd.get (); /* Implicit param to next_text_symbol. */ - symbuf_end = symbuf_idx = 0; - symbuf_read = 0; - 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_dbx_symtab - would slow down initial readin, so we look for it here instead. */ - if (!processing_acc_compilation && sym_offset >= (int) symbol_size) - { - stabs_seek (sym_offset - symbol_size); - fill_symbuf (abfd); - 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 (symfile_bfd)) - ++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); - processing_gcc_compilation = 0; - } - - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - 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 / symbol_size; - - for (symnum = 0; - symnum < max_symnum; - symnum++) - { - QUIT; /* Allow this to be interruptable. */ - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - 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 (); - - dbxread_objfile = NULL; -} - -/* 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); - } -} - -/* This handles a single symbol from the symbol-file, building symbols - into a GDB symtab. It takes these arguments and an implicit argument. - - TYPE is the type field of the ".stab" symbol entry. - DESC is the desc field of the ".stab" entry. - VALU is the value field of the ".stab" entry. - NAME is the symbol name, in our address space. - SECTION_OFFSETS is a set of amounts by which the sections of this - object file were relocated when it was loaded into memory. Note - that these section_offsets are not the objfile->section_offsets but - the pst->section_offsets. All symbols that refer to memory - locations need to be offset by these amounts. - OBJFILE is the object file from which we are reading symbols. It - is used in end_compunit_symtab. - LANGUAGE is the language of the symtab. -*/ - -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; - - /* 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); - start_subfile (name); - break; - - case N_EINCL: - start_subfile (pop_subfile ()); - break; - - case N_EXCL: - add_old_header_file (name, valu); - 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 (!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)) - { - struct 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; -} - -/* FIXME: The only difference between this and elfstab_build_psymtabs - is the call to install_minimal_symbols for elf, and the support for - split sections. If the differences are really that small, the code - should be shared. */ - -/* Scan and build partial symbols for an coff symbol file. - The coff file has already been processed to get its minimal symbols. - - This routine is the equivalent of dbx_symfile_init and dbx_symfile_read - rolled into one. - - OBJFILE is the object file we are reading symbols from. - ADDR is the address relative to which the symbols are (e.g. - the base address of the text segment). - TEXTADDR is the address of the text section. - TEXTSIZE is the size of the text section. - STABSECTS is the list of .stab sections in OBJFILE. - STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the - .stabstr section exists. - - This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, - adjusted for coff details. */ - -void -coffstab_build_psymtabs (struct objfile *objfile, - CORE_ADDR textaddr, unsigned int textsize, - const std::vector<asection *> &stabsects, - file_ptr stabstroffset, unsigned int stabstrsize) -{ - int val; - bfd *sym_bfd = objfile->obfd.get (); - const char *name = bfd_get_filename (sym_bfd); - unsigned int stabsize; - - /* Allocate struct to keep track of stab reading. */ - dbx_objfile_data_key.emplace (objfile); - - DBX_TEXT_ADDR (objfile) = textaddr; - DBX_TEXT_SIZE (objfile) = textsize; - -#define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ - DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE; - DBX_STRINGTAB_SIZE (objfile) = stabstrsize; - - if (stabstrsize > bfd_get_size (sym_bfd)) - error (_("ridiculous string table size: %d bytes"), stabstrsize); - DBX_STRINGTAB (objfile) = (char *) - obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1); - OBJSTAT (objfile, sz_strtab += stabstrsize + 1); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); - if (val < 0) - perror_with_name (name); - val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); - if (val != stabstrsize) - perror_with_name (name); - - stabsread_new_init (); - free_header_files (); - init_header_files (); - - processing_acc_compilation = 1; - - /* In a coff file, we've already installed the minimal symbols that came - from the coff (non-stab) symbol table, so always act like an - incremental load here. */ - scoped_restore save_symbuf_sections - = make_scoped_restore (&symbuf_sections); - if (stabsects.size () == 1) - { - stabsize = bfd_section_size (stabsects[0]); - DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); - DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos; - } - else - { - DBX_SYMCOUNT (objfile) = 0; - for (asection *section : stabsects) - { - stabsize = bfd_section_size (section); - DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile); - } - - DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos; - - sect_idx = 1; - symbuf_sections = &stabsects; - symbuf_left = bfd_section_size (stabsects[0]); - symbuf_read = 0; - } - - dbx_symfile_read (objfile, 0); -} -/* Scan and build partial symbols for an ELF symbol file. - This ELF file has already been processed to get its minimal symbols. - - This routine is the equivalent of dbx_symfile_init and dbx_symfile_read - rolled into one. - - OBJFILE is the object file we are reading symbols from. - ADDR is the address relative to which the symbols are (e.g. - the base address of the text segment). - STABSECT is the BFD section information for the .stab section. - STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the - .stabstr section exists. - - This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, - adjusted for elf details. */ - -void -elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect, - file_ptr stabstroffset, unsigned int stabstrsize) -{ - int val; - bfd *sym_bfd = objfile->obfd.get (); - const char *name = bfd_get_filename (sym_bfd); - - stabsread_new_init (); - - /* Allocate struct to keep track of stab reading. */ - dbx_objfile_data_key.emplace (objfile); - - /* Find the first and last text address. dbx_symfile_read seems to - want this. */ - find_text_range (sym_bfd, objfile); - -#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ - DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; - DBX_SYMCOUNT (objfile) - = bfd_section_size (stabsect) / DBX_SYMBOL_SIZE (objfile); - DBX_STRINGTAB_SIZE (objfile) = stabstrsize; - DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; - DBX_STAB_SECTION (objfile) = stabsect; - - if (stabstrsize > bfd_get_size (sym_bfd)) - error (_("ridiculous string table size: %d bytes"), stabstrsize); - DBX_STRINGTAB (objfile) = (char *) - obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1); - OBJSTAT (objfile, sz_strtab += stabstrsize + 1); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); - if (val < 0) - perror_with_name (name); - val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); - if (val != stabstrsize) - perror_with_name (name); - - stabsread_new_init (); - free_header_files (); - init_header_files (); - - processing_acc_compilation = 1; - - symbuf_read = 0; - symbuf_left = bfd_section_size (stabsect); - - scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data); - gdb::unique_xmalloc_ptr<gdb_byte> data_holder; - - stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL); - if (stabs_data) - data_holder.reset (stabs_data); - - /* In an elf file, we've already installed the minimal symbols that came - from the elf (non-stab) symbol table, so always act like an - incremental load here. dbx_symfile_read should not generate any new - minimal symbols, since we will have already read the ELF dynamic symbol - table and normal symbol entries won't be in the ".stab" section; but in - case it does, it will install them itself. */ - dbx_symfile_read (objfile, 0); -} /* Scan and build partial symbols for a file with special sections for stabs and stabstrings. The file has already been processed to get its minimal @@ -3219,7 +332,7 @@ stabsect_build_psymtabs (struct objfile *objfile, char *stab_name, /* Now, do an incremental load. */ - processing_acc_compilation = 1; + dbx_objfile_data_key.get (objfile)->ctx.processing_acc_compilation = 1; dbx_symfile_read (objfile, 0); } |