| /* Read os9/os9k symbol tables and convert to internal format, for GDB. |
| Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 96, 1998 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* This module provides three functions: os9k_symfile_init, |
| which initializes to read a symbol file; os9k_new_init, which |
| discards existing cached information when all symbols are being |
| discarded; and os9k_symfile_read, which reads a symbol table |
| from a file. |
| |
| os9k_symfile_read only does the minimum work necessary for letting the |
| user "name" things symbolically; it does not read the entire symtab. |
| Instead, it reads the external and static symbols and puts them in partial |
| symbol tables. When more extensive information is requested of a |
| file, the corresponding partial symbol table is mutated into a full |
| fledged symbol table by going back and reading the symbols |
| for real. os9k_psymtab_to_symtab() is the function that does this */ |
| |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include <stdio.h> |
| |
| #if defined(USG) || defined(__CYGNUSCLIB__) |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #endif |
| |
| #include "obstack.h" |
| #include "gdb_stat.h" |
| #include <ctype.h> |
| #include "symtab.h" |
| #include "breakpoint.h" |
| #include "command.h" |
| #include "target.h" |
| #include "gdbcore.h" /* for bfd stuff */ |
| #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "gdb-stabs.h" |
| #include "demangle.h" |
| #include "language.h" /* Needed inside partial-stab.h */ |
| #include "complaints.h" |
| #include "os9k.h" |
| #include "stabsread.h" |
| |
| extern void _initialize_os9kread PARAMS ((void)); |
| |
| /* Each partial symbol table entry contains a pointer to private data for the |
| read_symtab() function to use when expanding a partial symbol table entry |
| to a full symbol table entry. |
| |
| For dbxread this structure contains the offset within the file symbol table |
| of first local symbol for this file, and count 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). It also contains |
| further information needed to locate the symbols if they are in an ELF file. |
| |
| If ldsymcnt is 0, the only reason for this thing's existence is the |
| dependency list. Nothing else will happen when it is read in. */ |
| |
| #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) |
| #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum) |
| |
| struct symloc |
| { |
| int ldsymoff; |
| int ldsymnum; |
| }; |
| |
| /* Remember what we deduced to be the source language of this psymtab. */ |
| static enum language psymtab_language = language_unknown; |
| |
| /* keep partial symbol table file nested depth */ |
| static int psymfile_depth = 0; |
| |
| /* keep symbol table file nested depth */ |
| static int symfile_depth = 0; |
| |
| /* Nonzero means give verbose info on gdb action. From main.c. */ |
| extern int info_verbose; |
| |
| extern int previous_stab_code; |
| |
| /* Name of last function encountered. Used in Solaris to approximate |
| object file boundaries. */ |
| static char *last_function_name; |
| |
| /* Complaints about the symbols we have encountered. */ |
| extern struct complaint lbrac_complaint; |
| |
| extern struct complaint unknown_symtype_complaint; |
| |
| extern struct complaint unknown_symchar_complaint; |
| |
| extern struct complaint lbrac_rbrac_complaint; |
| |
| extern struct complaint repeated_header_complaint; |
| |
| extern struct complaint repeated_header_name_complaint; |
| |
| #if 0 |
| static struct complaint lbrac_unmatched_complaint = |
| {"unmatched Increment Block Entry before symtab pos %d", 0, 0}; |
| |
| static struct complaint lbrac_mismatch_complaint = |
| {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0}; |
| #endif |
| |
| /* Local function prototypes */ |
| |
| static void |
| read_minimal_symbols PARAMS ((struct objfile *)); |
| |
| static void |
| os9k_read_ofile_symtab PARAMS ((struct partial_symtab *)); |
| |
| static void |
| os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *)); |
| |
| static void |
| os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); |
| |
| static void |
| read_os9k_psymtab PARAMS ((struct objfile *, CORE_ADDR, int)); |
| |
| static int |
| fill_sym PARAMS ((FILE *, bfd *)); |
| |
| static void |
| os9k_symfile_init PARAMS ((struct objfile *)); |
| |
| static void |
| os9k_new_init PARAMS ((struct objfile *)); |
| |
| static void |
| os9k_symfile_read PARAMS ((struct objfile *, int)); |
| |
| static void |
| os9k_symfile_finish PARAMS ((struct objfile *)); |
| |
| static void |
| os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *, |
| struct section_offsets *, struct objfile *)); |
| |
| static struct partial_symtab * |
| os9k_start_psymtab PARAMS ((struct objfile *, char *, |
| CORE_ADDR, int, int, struct partial_symbol **, |
| struct partial_symbol **)); |
| |
| static struct partial_symtab * |
| os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR, |
| struct partial_symtab **, int)); |
| |
| static void |
| record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); |
| |
| #define HANDLE_RBRAC(val) \ |
| if ((val) > pst->texthigh) pst->texthigh = (val); |
| |
| #define SWAP_STBHDR(hdrp, abfd) \ |
| { \ |
| (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \ |
| (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \ |
| (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \ |
| (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \ |
| } |
| #define SWAP_STBSYM(symp, abfd) \ |
| { \ |
| (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \ |
| (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \ |
| (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \ |
| } |
| #define N_DATA 0 |
| #define N_BSS 1 |
| #define N_RDATA 2 |
| #define N_IDATA 3 |
| #define N_TEXT 4 |
| #define N_ABS 6 |
| |
| static void |
| record_minimal_symbol (name, address, type, objfile) |
| char *name; |
| CORE_ADDR address; |
| int type; |
| struct objfile *objfile; |
| { |
| enum minimal_symbol_type ms_type; |
| |
| switch (type) |
| { |
| case N_TEXT: |
| ms_type = mst_text; |
| address += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| break; |
| case N_DATA: |
| ms_type = mst_data; |
| break; |
| case N_BSS: |
| ms_type = mst_bss; |
| break; |
| case N_RDATA: |
| ms_type = mst_bss; |
| break; |
| case N_IDATA: |
| ms_type = mst_data; |
| break; |
| case N_ABS: |
| ms_type = mst_abs; |
| break; |
| default: |
| ms_type = mst_unknown; |
| break; |
| } |
| |
| prim_record_minimal_symbol (name, address, ms_type, objfile); |
| } |
| |
| /* read and process .stb file and store in minimal symbol table */ |
| typedef char mhhdr[80]; |
| struct stbhdr |
| { |
| mhhdr comhdr; |
| char *name; |
| short fmtno; |
| int crc; |
| int offset; |
| int nsym; |
| char *pad; |
| }; |
| struct stbsymbol |
| { |
| int value; |
| short type; |
| int stroff; |
| }; |
| #define STBSYMSIZE 10 |
| |
| static void |
| read_minimal_symbols (objfile) |
| struct objfile *objfile; |
| { |
| FILE *fp; |
| bfd *abfd; |
| struct stbhdr hdr; |
| struct stbsymbol sym; |
| int ch, i, j, off; |
| char buf[64], buf1[128]; |
| |
| fp = objfile->auxf1; |
| if (fp == NULL) |
| return; |
| abfd = objfile->obfd; |
| fread (&hdr.comhdr[0], sizeof (mhhdr), 1, fp); |
| i = 0; |
| ch = getc (fp); |
| while (ch != -1) |
| { |
| buf[i] = (char) ch; |
| i++; |
| if (ch == 0) |
| break; |
| ch = getc (fp); |
| }; |
| if (i % 2) |
| ch = getc (fp); |
| hdr.name = &buf[0]; |
| |
| fread (&hdr.fmtno, sizeof (hdr.fmtno), 1, fp); |
| fread (&hdr.crc, sizeof (hdr.crc), 1, fp); |
| fread (&hdr.offset, sizeof (hdr.offset), 1, fp); |
| fread (&hdr.nsym, sizeof (hdr.nsym), 1, fp); |
| SWAP_STBHDR (&hdr, abfd); |
| |
| /* read symbols */ |
| init_minimal_symbol_collection (); |
| off = hdr.offset; |
| for (i = hdr.nsym; i > 0; i--) |
| { |
| fseek (fp, (long) off, 0); |
| fread (&sym.value, sizeof (sym.value), 1, fp); |
| fread (&sym.type, sizeof (sym.type), 1, fp); |
| fread (&sym.stroff, sizeof (sym.stroff), 1, fp); |
| SWAP_STBSYM (&sym, abfd); |
| fseek (fp, (long) sym.stroff, 0); |
| j = 0; |
| ch = getc (fp); |
| while (ch != -1) |
| { |
| buf1[j] = (char) ch; |
| j++; |
| if (ch == 0) |
| break; |
| ch = getc (fp); |
| }; |
| record_minimal_symbol (buf1, sym.value, sym.type & 7, objfile); |
| off += STBSYMSIZE; |
| }; |
| install_minimal_symbols (objfile); |
| return; |
| } |
| |
| /* Scan and build partial symbols for a symbol file. |
| We have been initialized by a call to os9k_symfile_init, which |
| put all the relevant info into a "struct os9k_symfile_info", |
| hung off the objfile structure. |
| |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). */ |
| |
| static void |
| os9k_symfile_read (objfile, mainline) |
| struct objfile *objfile; |
| int mainline; /* FIXME comments above */ |
| { |
| bfd *sym_bfd; |
| struct cleanup *back_to; |
| |
| sym_bfd = objfile->obfd; |
| /* If we are reinitializing, or if we have never loaded syms yet, init */ |
| if (mainline || objfile->global_psymbols.size == 0 || |
| objfile->static_psymbols.size == 0) |
| init_psymbol_list (objfile, DBX_SYMCOUNT (objfile)); |
| |
| free_pending_blocks (); |
| back_to = make_cleanup (really_free_pendings, 0); |
| |
| make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); |
| read_minimal_symbols (objfile); |
| |
| /* Now that the symbol table data of the executable file are all in core, |
| process them and define symbols accordingly. */ |
| read_os9k_psymtab (objfile, |
| DBX_TEXT_ADDR (objfile), |
| DBX_TEXT_SIZE (objfile)); |
| |
| do_cleanups (back_to); |
| } |
| |
| /* Initialize anything that needs initializing when a completely new |
| symbol file is specified (not just adding some symbols from another |
| file, e.g. a shared library). */ |
| |
| static void |
| os9k_new_init (ignore) |
| struct objfile *ignore; |
| { |
| stabsread_new_init (); |
| buildsym_new_init (); |
| psymfile_depth = 0; |
| /* |
| init_header_files (); |
| */ |
| } |
| |
| /* os9k_symfile_init () |
| It is passed a struct objfile which contains, among other things, |
| the BFD for the file whose symbols are being read, and a slot for a pointer |
| to "private data" which we fill with goodies. |
| |
| Since BFD doesn't know how to read debug symbols in a format-independent |
| way (and may never do so...), we have to do it ourselves. We will never |
| be called unless this is an a.out (or very similar) file. |
| FIXME, there should be a cleaner peephole into the BFD environment here. */ |
| |
| static void |
| os9k_symfile_init (objfile) |
| struct objfile *objfile; |
| { |
| bfd *sym_bfd = objfile->obfd; |
| char *name = bfd_get_filename (sym_bfd); |
| char dbgname[512], stbname[512]; |
| FILE *symfile = 0; |
| FILE *minfile = 0; |
| asection *text_sect; |
| |
| strcpy (dbgname, name); |
| strcat (dbgname, ".dbg"); |
| strcpy (stbname, name); |
| strcat (stbname, ".stb"); |
| |
| if ((symfile = fopen (dbgname, "r")) == NULL) |
| { |
| warning ("Symbol file %s not found", dbgname); |
| } |
| objfile->auxf2 = symfile; |
| |
| if ((minfile = fopen (stbname, "r")) == NULL) |
| { |
| warning ("Symbol file %s not found", stbname); |
| } |
| objfile->auxf1 = minfile; |
| |
| /* Allocate struct to keep track of the symfile */ |
| objfile->sym_stab_info = (struct dbx_symfile_info *) |
| xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); |
| DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; |
| |
| text_sect = bfd_get_section_by_name (sym_bfd, ".text"); |
| if (!text_sect) |
| error ("Can't find .text section in file"); |
| DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); |
| DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); |
| |
| DBX_SYMBOL_SIZE (objfile) = 0; /* variable size symbol */ |
| DBX_SYMCOUNT (objfile) = 0; /* used to be bfd_get_symcount(sym_bfd) */ |
| DBX_SYMTAB_OFFSET (objfile) = 0; /* used to be SYMBOL_TABLE_OFFSET */ |
| } |
| |
| /* Perform any local cleanups required when we are done with a particular |
| objfile. I.E, we are in the process of discarding all symbol information |
| for an objfile, freeing up all memory held for it, and unlinking the |
| objfile struct from the global list of known objfiles. */ |
| |
| static void |
| os9k_symfile_finish (objfile) |
| struct objfile *objfile; |
| { |
| if (objfile->sym_stab_info != NULL) |
| { |
| mfree (objfile->md, objfile->sym_stab_info); |
| } |
| /* |
| free_header_files (); |
| */ |
| } |
| |
| |
| struct st_dbghdr |
| { |
| int sync; |
| short rev; |
| int crc; |
| short os; |
| short cpu; |
| }; |
| #define SYNC (int)0xefbefeca |
| |
| #define SWAP_DBGHDR(hdrp, abfd) \ |
| { \ |
| (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \ |
| (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \ |
| (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \ |
| (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \ |
| (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \ |
| } |
| |
| #define N_SYM_CMPLR 0 |
| #define N_SYM_SLINE 1 |
| #define N_SYM_SYM 2 |
| #define N_SYM_LBRAC 3 |
| #define N_SYM_RBRAC 4 |
| #define N_SYM_SE 5 |
| |
| struct internal_symstruct |
| { |
| short n_type; |
| short n_desc; |
| long n_value; |
| char *n_strx; |
| }; |
| static struct internal_symstruct symbol; |
| static struct internal_symstruct *symbuf = &symbol; |
| static char strbuf[4096]; |
| static struct st_dbghdr dbghdr; |
| static short cmplrid; |
| |
| #define VER_PRE_ULTRAC ((short)4) |
| #define VER_ULTRAC ((short)5) |
| |
| static int |
| fill_sym (dbg_file, abfd) |
| FILE *dbg_file; |
| bfd *abfd; |
| { |
| short si, nmask; |
| long li; |
| int ii; |
| char *p; |
| |
| int nbytes = fread (&si, sizeof (si), 1, dbg_file); |
| if (nbytes == 0) |
| return 0; |
| if (nbytes < 0) |
| perror_with_name ("reading .dbg file."); |
| symbuf->n_desc = 0; |
| symbuf->n_value = 0; |
| symbuf->n_strx = NULL; |
| symbuf->n_type = bfd_get_16 (abfd, (unsigned char *) &si); |
| symbuf->n_type = 0xf & symbuf->n_type; |
| switch (symbuf->n_type) |
| { |
| case N_SYM_CMPLR: |
| fread (&si, sizeof (si), 1, dbg_file); |
| symbuf->n_desc = bfd_get_16 (abfd, (unsigned char *) &si); |
| cmplrid = symbuf->n_desc & 0xff; |
| break; |
| case N_SYM_SLINE: |
| fread (&li, sizeof (li), 1, dbg_file); |
| symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li); |
| fread (&li, sizeof (li), 1, dbg_file); |
| li = bfd_get_32 (abfd, (unsigned char *) &li); |
| symbuf->n_strx = (char *) (li >> 12); |
| symbuf->n_desc = li & 0xfff; |
| break; |
| case N_SYM_SYM: |
| fread (&li, sizeof (li), 1, dbg_file); |
| symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li); |
| si = 0; |
| do |
| { |
| ii = getc (dbg_file); |
| strbuf[si++] = (char) ii; |
| } |
| while (ii != 0 || si % 2 != 0); |
| symbuf->n_strx = strbuf; |
| p = (char *) strchr (strbuf, ':'); |
| if (!p) |
| break; |
| if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC) |
| { |
| fread (&si, sizeof (si), 1, dbg_file); |
| nmask = bfd_get_16 (abfd, (unsigned char *) &si); |
| for (ii = 0; ii < nmask; ii++) |
| fread (&si, sizeof (si), 1, dbg_file); |
| } |
| break; |
| case N_SYM_LBRAC: |
| fread (&li, sizeof (li), 1, dbg_file); |
| symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li); |
| break; |
| case N_SYM_RBRAC: |
| fread (&li, sizeof (li), 1, dbg_file); |
| symbuf->n_value = bfd_get_32 (abfd, (unsigned char *) &li); |
| break; |
| case N_SYM_SE: |
| break; |
| } |
| return 1; |
| } |
| |
| /* Given pointers to an a.out symbol table in core containing dbx |
| style data, setup partial_symtab's describing each source file for |
| which debugging information is available. |
| SYMFILE_NAME is the name of the file we are reading from. */ |
| |
| static void |
| read_os9k_psymtab (objfile, text_addr, text_size) |
| struct objfile *objfile; |
| CORE_ADDR text_addr; |
| int text_size; |
| { |
| register struct internal_symstruct *bufp = 0; /* =0 avoids gcc -Wall glitch */ |
| register char *namestring; |
| int past_first_source_file = 0; |
| CORE_ADDR last_o_file_start = 0; |
| #if 0 |
| struct cleanup *back_to; |
| #endif |
| bfd *abfd; |
| FILE *fp; |
| |
| /* End of the text segment of the executable file. */ |
| static CORE_ADDR end_of_text_addr; |
| |
| /* Current partial symtab */ |
| static struct partial_symtab *pst = 0; |
| |
| /* List of current psymtab's include files */ |
| char **psymtab_include_list; |
| int includes_allocated; |
| int includes_used; |
| |
| /* Index within current psymtab dependency list */ |
| struct partial_symtab **dependency_list; |
| int dependencies_used, dependencies_allocated; |
| |
| includes_allocated = 30; |
| includes_used = 0; |
| psymtab_include_list = (char **) alloca (includes_allocated * |
| sizeof (char *)); |
| |
| dependencies_allocated = 30; |
| dependencies_used = 0; |
| dependency_list = |
| (struct partial_symtab **) alloca (dependencies_allocated * |
| sizeof (struct partial_symtab *)); |
| |
| last_source_file = NULL; |
| |
| #ifdef END_OF_TEXT_DEFAULT |
| end_of_text_addr = END_OF_TEXT_DEFAULT; |
| #else |
| end_of_text_addr = text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT) |
| + text_size; /* Relocate */ |
| #endif |
| |
| abfd = objfile->obfd; |
| fp = objfile->auxf2; |
| if (!fp) |
| return; |
| |
| fread (&dbghdr.sync, sizeof (dbghdr.sync), 1, fp); |
| fread (&dbghdr.rev, sizeof (dbghdr.rev), 1, fp); |
| fread (&dbghdr.crc, sizeof (dbghdr.crc), 1, fp); |
| fread (&dbghdr.os, sizeof (dbghdr.os), 1, fp); |
| fread (&dbghdr.cpu, sizeof (dbghdr.cpu), 1, fp); |
| SWAP_DBGHDR (&dbghdr, abfd); |
| |
| symnum = 0; |
| while (1) |
| { |
| int ret; |
| long cursymoffset; |
| |
| /* Get the symbol for this run and pull out some info */ |
| QUIT; /* allow this to be interruptable */ |
| cursymoffset = ftell (objfile->auxf2); |
| ret = fill_sym (objfile->auxf2, abfd); |
| if (ret <= 0) |
| break; |
| else |
| symnum++; |
| bufp = symbuf; |
| |
| /* Special case to speed up readin. */ |
| if (bufp->n_type == (short) N_SYM_SLINE) |
| continue; |
| |
| #define CUR_SYMBOL_VALUE bufp->n_value |
| /* partial-stab.h */ |
| |
| switch (bufp->n_type) |
| { |
| char *p; |
| |
| case N_SYM_CMPLR: |
| continue; |
| |
| case N_SYM_SE: |
| CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| if (psymfile_depth == 1 && pst) |
| { |
| os9k_end_psymtab (pst, psymtab_include_list, includes_used, |
| symnum, CUR_SYMBOL_VALUE, |
| dependency_list, dependencies_used); |
| pst = (struct partial_symtab *) 0; |
| includes_used = 0; |
| dependencies_used = 0; |
| } |
| psymfile_depth--; |
| continue; |
| |
| case N_SYM_SYM: /* Typedef or automatic variable. */ |
| namestring = bufp->n_strx; |
| p = (char *) strchr (namestring, ':'); |
| if (!p) |
| continue; /* Not a debugging symbol. */ |
| |
| /* Main processing section for debugging symbols which |
| the initial read through the symbol tables needs to worry |
| about. If we reach this point, the symbol which we are |
| considering is definitely one we are interested in. |
| p must also contain the (valid) index into the namestring |
| which indicates the debugging type symbol. */ |
| |
| switch (p[1]) |
| { |
| case 'S': |
| { |
| unsigned long valu; |
| enum language tmp_language; |
| char *str, *p; |
| int n; |
| |
| valu = CUR_SYMBOL_VALUE; |
| if (valu) |
| valu += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| past_first_source_file = 1; |
| |
| p = strchr (namestring, ':'); |
| if (p) |
| n = p - namestring; |
| else |
| n = strlen (namestring); |
| str = alloca (n + 1); |
| strncpy (str, namestring, n); |
| str[n] = '\0'; |
| |
| if (psymfile_depth == 0) |
| { |
| if (!pst) |
| pst = os9k_start_psymtab (objfile, |
| str, valu, |
| cursymoffset, |
| symnum - 1, |
| objfile->global_psymbols.next, |
| objfile->static_psymbols.next); |
| } |
| else |
| { /* this is a include file */ |
| tmp_language = deduce_language_from_filename (str); |
| if (tmp_language != language_unknown |
| && (tmp_language != language_c |
| || psymtab_language != language_cplus)) |
| psymtab_language = tmp_language; |
| |
| /* |
| if (pst && STREQ (str, pst->filename)) |
| continue; |
| { |
| register int i; |
| for (i = 0; i < includes_used; i++) |
| if (STREQ (str, psymtab_include_list[i])) |
| { |
| i = -1; |
| break; |
| } |
| if (i == -1) |
| continue; |
| } |
| */ |
| |
| psymtab_include_list[includes_used++] = str; |
| if (includes_used >= includes_allocated) |
| { |
| char **orig = psymtab_include_list; |
| |
| psymtab_include_list = (char **) |
| alloca ((includes_allocated *= 2) * sizeof (char *)); |
| memcpy ((PTR) psymtab_include_list, (PTR) orig, |
| includes_used * sizeof (char *)); |
| } |
| |
| } |
| psymfile_depth++; |
| continue; |
| } |
| |
| case 'v': |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_STATIC, |
| &objfile->static_psymbols, |
| 0, CUR_SYMBOL_VALUE, |
| psymtab_language, objfile); |
| continue; |
| case 'V': |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_STATIC, |
| &objfile->global_psymbols, |
| 0, CUR_SYMBOL_VALUE, |
| psymtab_language, objfile); |
| continue; |
| |
| case 'T': |
| if (p != namestring) /* a name is there, not just :T... */ |
| { |
| add_psymbol_to_list (namestring, p - namestring, |
| STRUCT_NAMESPACE, LOC_TYPEDEF, |
| &objfile->static_psymbols, |
| CUR_SYMBOL_VALUE, 0, |
| psymtab_language, objfile); |
| if (p[2] == 't') |
| { |
| /* Also a typedef with the same name. */ |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_TYPEDEF, |
| &objfile->static_psymbols, |
| CUR_SYMBOL_VALUE, 0, psymtab_language, |
| objfile); |
| p += 1; |
| } |
| /* The semantics of C++ state that "struct foo { ... }" |
| also defines a typedef for "foo". Unfortuantely, cfront |
| never makes the typedef when translating from C++ to C. |
| We make the typedef here so that "ptype foo" works as |
| expected for cfront translated code. */ |
| else if (psymtab_language == language_cplus) |
| { |
| /* Also a typedef with the same name. */ |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_TYPEDEF, |
| &objfile->static_psymbols, |
| CUR_SYMBOL_VALUE, 0, psymtab_language, |
| objfile); |
| } |
| } |
| goto check_enum; |
| case 't': |
| if (p != namestring) /* a name is there, not just :T... */ |
| { |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_TYPEDEF, |
| &objfile->static_psymbols, |
| CUR_SYMBOL_VALUE, 0, |
| psymtab_language, objfile); |
| } |
| check_enum: |
| /* If this is an enumerated type, we need to |
| add all the enum constants to the partial symbol |
| table. This does not cover enums without names, e.g. |
| "enum {a, b} c;" in C, but fortunately those are |
| rare. There is no way for GDB to find those from the |
| enum type without spending too much time on it. Thus |
| to solve this problem, the compiler needs to put out the |
| enum in a nameless type. GCC2 does this. */ |
| |
| /* We are looking for something of the form |
| <name> ":" ("t" | "T") [<number> "="] "e" <size> |
| {<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') |
| { |
| /* We have found an enumerated type. skip size */ |
| while (*p >= '0' && *p <= '9') |
| p++; |
| /* According to comments in read_enum_type |
| a comma could end it instead of a semicolon. |
| I don't know where that happens. |
| Accept either. */ |
| while (*p && *p != ';' && *p != ',') |
| { |
| char *q; |
| |
| /* Check for and handle cretinous dbx symbol name |
| continuation! |
| if (*p == '\\') |
| p = next_symbol_text (objfile); |
| */ |
| |
| /* Point to the character after the name |
| of the enum constant. */ |
| for (q = p; *q && *q != ':'; q++) |
| ; |
| /* Note that the value doesn't matter for |
| enum constants in psymtabs, just in symtabs. */ |
| add_psymbol_to_list (p, q - p, |
| VAR_NAMESPACE, LOC_CONST, |
| &objfile->static_psymbols, 0, |
| 0, psymtab_language, objfile); |
| /* Point past the name. */ |
| p = q; |
| /* Skip over the value. */ |
| while (*p && *p != ',') |
| p++; |
| /* Advance past the comma. */ |
| if (*p) |
| p++; |
| } |
| } |
| continue; |
| case 'c': |
| /* Constant, e.g. from "const" in Pascal. */ |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_CONST, |
| &objfile->static_psymbols, CUR_SYMBOL_VALUE, |
| 0, psymtab_language, objfile); |
| continue; |
| |
| case 'f': |
| CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| if (pst && pst->textlow == 0) |
| pst->textlow = CUR_SYMBOL_VALUE; |
| |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_BLOCK, |
| &objfile->static_psymbols, CUR_SYMBOL_VALUE, |
| 0, psymtab_language, objfile); |
| continue; |
| |
| case 'F': |
| CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| if (pst && pst->textlow == 0) |
| pst->textlow = CUR_SYMBOL_VALUE; |
| |
| add_psymbol_to_list (namestring, p - namestring, |
| VAR_NAMESPACE, LOC_BLOCK, |
| &objfile->global_psymbols, CUR_SYMBOL_VALUE, |
| 0, psymtab_language, objfile); |
| continue; |
| |
| case 'p': |
| case 'l': |
| case 's': |
| 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. */ |
| |
| complain (&unknown_symchar_complaint, p[1]); |
| continue; |
| } |
| |
| case N_SYM_RBRAC: |
| CUR_SYMBOL_VALUE += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
| #ifdef HANDLE_RBRAC |
| HANDLE_RBRAC (CUR_SYMBOL_VALUE); |
| continue; |
| #endif |
| case N_SYM_LBRAC: |
| continue; |
| |
| default: |
| /* If we haven't found it yet, ignore it. It's probably some |
| new type we don't know about yet. */ |
| complain (&unknown_symtype_complaint, |
| local_hex_string ((unsigned long) bufp->n_type)); |
| continue; |
| } |
| } |
| |
| DBX_SYMCOUNT (objfile) = symnum; |
| |
| /* If there's stuff to be cleaned up, clean it up. */ |
| if (DBX_SYMCOUNT (objfile) > 0 |
| /*FIXME, does this have a bug at start address 0? */ |
| && last_o_file_start |
| && objfile->ei.entry_point < bufp->n_value |
| && objfile->ei.entry_point >= last_o_file_start) |
| { |
| objfile->ei.entry_file_lowpc = last_o_file_start; |
| objfile->ei.entry_file_highpc = bufp->n_value; |
| } |
| |
| if (pst) |
| { |
| os9k_end_psymtab (pst, psymtab_include_list, includes_used, |
| symnum, end_of_text_addr, |
| dependency_list, dependencies_used); |
| } |
| /* |
| do_cleanups (back_to); |
| */ |
| } |
| |
| /* Allocate and partially fill a partial symtab. It will be |
| completely filled at the end of the symbol list. |
| |
| SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| is the address relative to which its symbols are (incremental) or 0 |
| (normal). */ |
| |
| |
| static struct partial_symtab * |
| os9k_start_psymtab (objfile, |
| filename, textlow, ldsymoff, ldsymcnt, global_syms, static_syms) |
| struct objfile *objfile; |
| char *filename; |
| CORE_ADDR textlow; |
| int ldsymoff; |
| int ldsymcnt; |
| struct partial_symbol **global_syms; |
| struct partial_symbol **static_syms; |
| { |
| struct partial_symtab *result = |
| start_psymtab_common (objfile, objfile->section_offsets, |
| filename, textlow, global_syms, static_syms); |
| |
| result->read_symtab_private = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); |
| |
| LDSYMOFF (result) = ldsymoff; |
| LDSYMCNT (result) = ldsymcnt; |
| result->read_symtab = os9k_psymtab_to_symtab; |
| |
| /* Deduce the source language from the filename for this psymtab. */ |
| psymtab_language = deduce_language_from_filename (filename); |
| 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. */ |
| |
| static struct partial_symtab * |
| os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt, |
| capping_text, dependency_list, number_dependencies) |
| struct partial_symtab *pst; |
| char **include_list; |
| int num_includes; |
| int capping_symbol_cnt; |
| CORE_ADDR capping_text; |
| struct partial_symtab **dependency_list; |
| int number_dependencies; |
| /* struct partial_symbol *capping_global, *capping_static; */ |
| { |
| int i; |
| struct partial_symtab *p1; |
| struct objfile *objfile = pst->objfile; |
| |
| if (capping_symbol_cnt != -1) |
| LDSYMCNT (pst) = capping_symbol_cnt - LDSYMCNT (pst); |
| |
| /* 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 in partial-stab.h: if we see a static |
| or global function, and the textlow for the current pst |
| is still 0, 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 in partial-stab.h). 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. |
| |
| Unfortunately, that does not cover the case where the last function |
| in the file is static. See the paragraph below for more comments |
| on this situation. |
| |
| Finally, if we have a valid textlow for the current file, we run |
| down the partial_symtab_list filling in previous texthighs that |
| are still unknown. */ |
| |
| if (pst->texthigh == 0 && last_function_name) |
| { |
| char *p; |
| int n; |
| struct minimal_symbol *minsym; |
| |
| p = strchr (last_function_name, ':'); |
| if (p == NULL) |
| p = last_function_name; |
| n = p - last_function_name; |
| p = alloca (n + 1); |
| strncpy (p, last_function_name, n); |
| p[n] = 0; |
| |
| minsym = lookup_minimal_symbol (p, NULL, objfile); |
| |
| if (minsym) |
| { |
| pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + (long) MSYMBOL_INFO (minsym); |
| } |
| else |
| { |
| /* This file ends with a static function, and it's |
| difficult to imagine how hard it would be to track down |
| the elf symbol. Luckily, most of the time no one will notice, |
| since the next file will likely be compiled with -g, so |
| the code below will copy the first fuction's start address |
| back to our texthigh variable. (Also, if this file is the |
| last one in a dynamically linked program, texthigh already |
| has the right value.) If the next file isn't compiled |
| with -g, then the last function in this file winds up owning |
| all of the text space up to the next -g file, or the end (minus |
| shared libraries). This only matters for single stepping, |
| and even then it will still work, except that it will single |
| step through all of the covered functions, instead of setting |
| breakpoints around them as it usualy does. This makes it |
| pretty slow, but at least it doesn't fail. |
| |
| We can fix this with a fairly big change to bfd, but we need |
| to coordinate better with Cygnus if we want to do that. FIXME. */ |
| } |
| last_function_name = NULL; |
| } |
| |
| /* this test will be true if the last .o file is only data */ |
| if (pst->textlow == 0) |
| pst->textlow = pst->texthigh; |
| |
| /* 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, nor to set addresses on |
| `dependency' files that have both textlow and texthigh zero. */ |
| if (pst->textlow) |
| { |
| ALL_OBJFILE_PSYMTABS (objfile, p1) |
| { |
| if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) |
| { |
| p1->texthigh = pst->textlow; |
| /* if this file has only data, then make textlow match texthigh */ |
| if (p1->textlow == 0) |
| p1->textlow = p1->texthigh; |
| } |
| } |
| } |
| |
| /* End of kludge for patching Solaris textlow and texthigh. */ |
| |
| pst->n_global_syms = |
| objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
| pst->n_static_syms = |
| objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
| |
| pst->number_of_dependencies = number_dependencies; |
| if (number_dependencies) |
| { |
| pst->dependencies = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| memcpy (pst->dependencies, dependency_list, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| } |
| else |
| pst->dependencies = 0; |
| |
| for (i = 0; i < num_includes; i++) |
| { |
| struct partial_symtab *subpst = |
| allocate_psymtab (include_list[i], objfile); |
| |
| subpst->section_offsets = pst->section_offsets; |
| subpst->read_symtab_private = |
| (char *) obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct symloc)); |
| LDSYMOFF (subpst) = |
| LDSYMCNT (subpst) = |
| subpst->textlow = |
| subpst->texthigh = 0; |
| |
| /* We could save slight bits of space by only making one of these, |
| shared by the entire set of include files. FIXME-someday. */ |
| subpst->dependencies = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct partial_symtab *)); |
| subpst->dependencies[0] = pst; |
| subpst->number_of_dependencies = 1; |
| |
| subpst->globals_offset = |
| subpst->n_global_syms = |
| subpst->statics_offset = |
| subpst->n_static_syms = 0; |
| |
| subpst->readin = 0; |
| subpst->symtab = 0; |
| subpst->read_symtab = pst->read_symtab; |
| } |
| |
| sort_pst_symbols (pst); |
| |
| /* If there is already a psymtab or symtab for a file of this name, |
| remove it. |
| (If there is a symtab, more drastic things also happen.) |
| This happens in VxWorks. */ |
| free_named_symtabs (pst->filename); |
| |
| if (num_includes == 0 |
| && number_dependencies == 0 |
| && pst->n_global_syms == 0 |
| && pst->n_static_syms == 0) |
| { |
| /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| it is on the obstack, but we can forget to chain it on the list. */ |
| /* Indicate that psymtab was thrown away. */ |
| |
| discard_psymtab (pst); |
| |
| pst = (struct partial_symtab *) NULL; |
| } |
| return pst; |
| } |
| |
| static void |
| os9k_psymtab_to_symtab_1 (pst) |
| struct partial_symtab *pst; |
| { |
| struct cleanup *old_chain; |
| int i; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| /* Read in all partial symtabs on which this one is dependent */ |
| for (i = 0; i < pst->number_of_dependencies; i++) |
| if (!pst->dependencies[i]->readin) |
| { |
| /* Inform about additional files that need to be read in. */ |
| if (info_verbose) |
| { |
| fputs_filtered (" ", gdb_stdout); |
| wrap_here (""); |
| fputs_filtered ("and ", gdb_stdout); |
| wrap_here (""); |
| printf_filtered ("%s...", pst->dependencies[i]->filename); |
| wrap_here (""); /* Flush output */ |
| gdb_flush (gdb_stdout); |
| } |
| os9k_psymtab_to_symtab_1 (pst->dependencies[i]); |
| } |
| |
| if (LDSYMCNT (pst)) /* Otherwise it's a dummy */ |
| { |
| /* Init stuff necessary for reading in symbols */ |
| stabsread_init (); |
| buildsym_init (); |
| old_chain = make_cleanup (really_free_pendings, 0); |
| |
| /* Read in this file's symbols */ |
| os9k_read_ofile_symtab (pst); |
| sort_symtab_syms (pst->symtab); |
| do_cleanups (old_chain); |
| } |
| |
| pst->readin = 1; |
| } |
| |
| /* Read in all of the symbols for a given psymtab for real. |
| Be verbose about it if the user wants that. */ |
| |
| static void |
| os9k_psymtab_to_symtab (pst) |
| struct partial_symtab *pst; |
| { |
| bfd *sym_bfd; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| if (LDSYMCNT (pst) || pst->number_of_dependencies) |
| { |
| /* Print the message now, before reading the string table, |
| to avoid disconcerting pauses. */ |
| if (info_verbose) |
| { |
| printf_filtered ("Reading in symbols for %s...", pst->filename); |
| gdb_flush (gdb_stdout); |
| } |
| |
| sym_bfd = pst->objfile->obfd; |
| os9k_psymtab_to_symtab_1 (pst); |
| |
| /* Match with global symbols. This only needs to be done once, |
| after all of the symtabs and dependencies have been read in. */ |
| scan_file_globals (pst->objfile); |
| |
| /* Finish up the debug error message. */ |
| if (info_verbose) |
| printf_filtered ("done.\n"); |
| } |
| } |
| |
| /* Read in a defined section of a specific object file's symbols. */ |
| static void |
| os9k_read_ofile_symtab (pst) |
| struct partial_symtab *pst; |
| { |
| register struct internal_symstruct *bufp; |
| unsigned char type; |
| unsigned max_symnum; |
| register bfd *abfd; |
| struct objfile *objfile; |
| int sym_offset; /* Offset to start of symbols to read */ |
| CORE_ADDR text_offset; /* Start of text segment for symbols */ |
| int text_size; /* Size of text segment for symbols */ |
| FILE *dbg_file; |
| |
| objfile = pst->objfile; |
| sym_offset = LDSYMOFF (pst); |
| max_symnum = LDSYMCNT (pst); |
| text_offset = pst->textlow; |
| text_size = pst->texthigh - pst->textlow; |
| |
| current_objfile = objfile; |
| subfile_stack = NULL; |
| last_source_file = NULL; |
| |
| abfd = objfile->obfd; |
| dbg_file = objfile->auxf2; |
| |
| #if 0 |
| /* 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) |
| { |
| fseek (objefile->auxf2, sym_offset, SEEK_CUR); |
| fill_sym (objfile->auxf2, abfd); |
| bufp = symbuf; |
| |
| processing_gcc_compilation = 0; |
| if (bufp->n_type == N_TEXT) |
| { |
| if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 1; |
| else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 2; |
| } |
| |
| /* Try to select a C++ demangling based on the compilation unit |
| producer. */ |
| |
| if (processing_gcc_compilation) |
| { |
| if (AUTO_DEMANGLING) |
| { |
| set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| } |
| } |
| } |
| 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. */ |
| bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); |
| processing_gcc_compilation = 0; |
| } |
| #endif /* 0 */ |
| |
| fseek (dbg_file, (long) sym_offset, 0); |
| /* |
| if (bufp->n_type != (unsigned char)N_SYM_SYM) |
| error("First symbol in segment of executable not a source symbol"); |
| */ |
| |
| for (symnum = 0; symnum < max_symnum; symnum++) |
| { |
| QUIT; /* Allow this to be interruptable */ |
| fill_sym (dbg_file, abfd); |
| bufp = symbuf; |
| type = bufp->n_type; |
| |
| os9k_process_one_symbol ((int) type, (int) bufp->n_desc, |
| (CORE_ADDR) bufp->n_value, bufp->n_strx, pst->section_offsets, objfile); |
| |
| /* We skip checking for a new .o or -l file; that should never |
| happen in this routine. */ |
| #if 0 |
| 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 (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 1; |
| else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
| processing_gcc_compilation = 2; |
| |
| if (AUTO_DEMANGLING) |
| { |
| set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
| } |
| } |
| else if (type & N_EXT || type == (unsigned char) N_TEXT |
| || type == (unsigned char) N_NBTEXT |
| ) |
| { |
| /* Global symbol: see if we came across a dbx defintion 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. */ |
| ; |
| } |
| #endif /* 0 */ |
| } |
| |
| current_objfile = NULL; |
| |
| /* 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 pst->textlow is correct. */ |
| if (last_source_start_addr == 0) |
| last_source_start_addr = text_offset; |
| pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT); |
| end_stabs (); |
| } |
| |
| |
| /* 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. |
| 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_symtab. */ |
| |
| static void |
| os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile) |
| int type, desc; |
| CORE_ADDR valu; |
| char *name; |
| struct section_offsets *section_offsets; |
| struct objfile *objfile; |
| { |
| register struct context_stack *new; |
| /* The stab type used for the definition of the last function. |
| N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ |
| static int function_stab_type = 0; |
| |
| #if 0 |
| /* Something is wrong if we see real data before |
| seeing a source file name. */ |
| if (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; |
| } |
| #endif /* 0 */ |
| |
| switch (type) |
| { |
| case N_SYM_LBRAC: |
| /* On most machines, the block addresses are relative to the |
| N_SO, the linker did not relocate them (sigh). */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| new = push_context (desc, valu); |
| break; |
| |
| case N_SYM_RBRAC: |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| new = pop_context (); |
| |
| #if !defined (OS9K_VARIABLES_INSIDE_BLOCK) |
| #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1 |
| #endif |
| |
| if (!OS9K_VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) |
| local_symbols = new->locals; |
| |
| if (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 (local_symbols != NULL) |
| { |
| /* Muzzle a compiler bug that makes end < start. (which |
| compilers? Is this ever harmful?). */ |
| if (new->start_addr > valu) |
| { |
| complain (&lbrac_rbrac_complaint); |
| new->start_addr = valu; |
| } |
| /* Make a block for the local symbols within. */ |
| finish_block (0, &local_symbols, new->old_blocks, |
| new->start_addr, valu, objfile); |
| } |
| } |
| else |
| { |
| if (context_stack_depth == 0) |
| { |
| within_function = 0; |
| /* Make a block for the local symbols within. */ |
| finish_block (new->name, &local_symbols, new->old_blocks, |
| new->start_addr, valu, objfile); |
| } |
| else |
| { |
| /* attach local_symbols to the end of new->locals */ |
| if (!new->locals) |
| new->locals = local_symbols; |
| else |
| { |
| struct pending *p; |
| |
| p = new->locals; |
| while (p->next) |
| p = p->next; |
| p->next = local_symbols; |
| } |
| } |
| } |
| |
| if (OS9K_VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) |
| /* Now pop locals of block just finished. */ |
| local_symbols = new->locals; |
| break; |
| |
| |
| case N_SYM_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 fn-relative syms. */ |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| /* FIXME: loses if sizeof (char *) > sizeof (int) */ |
| record_line (current_subfile, (int) name, valu); |
| 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_SYM_SYM: |
| |
| if (name) |
| { |
| char deftype; |
| char *dirn, *n; |
| char *p = strchr (name, ':'); |
| if (p == NULL) |
| deftype = '\0'; |
| else |
| deftype = p[1]; |
| |
| |
| switch (deftype) |
| { |
| case 'S': |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| n = strrchr (name, '/'); |
| if (n != NULL) |
| { |
| *n = '\0'; |
| n++; |
| dirn = name; |
| } |
| else |
| { |
| n = name; |
| dirn = NULL; |
| } |
| *p = '\0'; |
| if (symfile_depth++ == 0) |
| { |
| if (last_source_file) |
| { |
| end_symtab (valu, objfile, SECT_OFF_TEXT); |
| end_stabs (); |
| } |
| start_stabs (); |
| os9k_stabs = 1; |
| start_symtab (n, dirn, valu); |
| record_debugformat ("OS9"); |
| } |
| else |
| { |
| push_subfile (); |
| start_subfile (n, dirn != NULL ? dirn : current_subfile->dirname); |
| } |
| break; |
| |
| case 'f': |
| case 'F': |
| valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); |
| function_stab_type = type; |
| |
| within_function = 1; |
| new = push_context (0, valu); |
| new->name = define_symbol (valu, name, desc, type, objfile); |
| break; |
| |
| case 'V': |
| case 'v': |
| valu += ANOFFSET (section_offsets, SECT_OFF_DATA); |
| define_symbol (valu, name, desc, type, objfile); |
| break; |
| |
| default: |
| define_symbol (valu, name, desc, type, objfile); |
| break; |
| } |
| } |
| break; |
| |
| case N_SYM_SE: |
| if (--symfile_depth != 0) |
| start_subfile (pop_subfile (), current_subfile->dirname); |
| break; |
| |
| default: |
| complain (&unknown_symtype_complaint, |
| local_hex_string ((unsigned long) type)); |
| /* FALLTHROUGH */ |
| break; |
| |
| case N_SYM_CMPLR: |
| break; |
| } |
| previous_stab_code = type; |
| } |
| |
| static struct sym_fns os9k_sym_fns = |
| { |
| bfd_target_os9k_flavour, |
| os9k_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| os9k_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| os9k_symfile_read, /* sym_read: read a symbol file into symtab */ |
| os9k_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_os9kread () |
| { |
| add_symtab_fns (&os9k_sym_fns); |
| } |