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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/os9kread.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
Diffstat (limited to 'gdb/os9kread.c')
-rw-r--r--gdb/os9kread.c1624
1 files changed, 1624 insertions, 0 deletions
diff --git a/gdb/os9kread.c b/gdb/os9kread.c
new file mode 100644
index 00000000000..673d415c6e2
--- /dev/null
+++ b/gdb/os9kread.c
@@ -0,0 +1,1624 @@
+/* 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"
+
+/* 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 *, struct section_offsets *));
+
+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 section_offsets *, 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 *, struct section_offsets *, 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 *, struct section_offsets *, 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 *,
+ struct section_offsets *));
+
+#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, section_offsets)
+ char *name;
+ CORE_ADDR address;
+ int type;
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+{
+ enum minimal_symbol_type ms_type;
+
+ switch (type)
+ {
+ case N_TEXT:
+ ms_type = mst_text;
+ address += ANOFFSET(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, section_offsets)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+{
+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, section_offsets);
+ 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.
+
+ SECTION_OFFSETS contains offsets relative to which the symbols in the
+ various sections are (depending where the sections were actually loaded).
+ MAINLINE is true if we are reading the main symbol
+ table (as opposed to a shared lib or dynamically loaded file). */
+
+static void
+os9k_symfile_read (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ 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 ((make_cleanup_func) really_free_pendings, 0);
+
+ make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
+ read_minimal_symbols (objfile, section_offsets);
+
+ /* Now that the symbol table data of the executable file are all in core,
+ process them and define symbols accordingly. */
+ read_os9k_psymtab (section_offsets, 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
+ and SECTION_OFFSETS is the set of offsets for the various sections
+ of the file (a set of zeros if the mainline program). */
+
+static void
+read_os9k_psymtab (section_offsets, objfile, text_addr, text_size)
+ struct section_offsets *section_offsets;
+ 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 + section_offsets->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(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 (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, section_offsets,
+ 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(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(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(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, section_offsets,
+ filename, textlow, ldsymoff,ldsymcnt, global_syms, static_syms)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ 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, 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 ((make_cleanup_func) 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 */
+ struct section_offsets *section_offsets;
+ FILE *dbg_file;
+
+ objfile = pst->objfile;
+ sym_offset = LDSYMOFF(pst);
+ max_symnum = LDSYMCNT(pst);
+ text_offset = pst->textlow;
+ text_size = pst->texthigh - pst->textlow;
+ section_offsets = pst->section_offsets;
+
+ 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, 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);
+}