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authorJeff Law <law@redhat.com>1996-01-08 17:55:25 +0000
committerJeff Law <law@redhat.com>1996-01-08 17:55:25 +0000
commit436d4143274d6bb3c32632f7ae1bd82cda5128b5 (patch)
tree1b03454d0f21a99f7d5f601c3f7d023edfea7e8f /gdb
parent01082eaf1926a56afc7b4cb51a25d3560ee31f5b (diff)
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* buildsym.c (end_symtab): Remove sort_pending and sort_linevec
arguments. Sorting is now dependent on OBJF_REORDERED. All callers/references changed. * dbxread.c (read_ofile_symtab): Correctly determine value for last_source_start_addr for reordered executables. (process_one_symbol): Handle N_FUN with no name as an end of function marker. * partial-stab.h (case N_FN, N_TEXT): Don't assume CUR_SYMBOL_VALUE is the high text address for a psymtab. (case N_SO): Likewise. (case N_FUN): Handle N_FUN with no name as an end of function marker. * minsyms.c (lookup_minimal_symbol_by_pc): Examine all symbols at the same address rather than a random subset of them. * coffread.c (coff_symfile_init): Set OBJF_REORDERED. * elfread.c (elf_symfile_init): Similarly. * somread.c (som_symfile_init): Similarly. * xcoffread.c (xcoff_symfile_init): Similarly. Support for debugging reordered executables. Remaining mentor vm changes.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog21
-rw-r--r--gdb/buildsym.c27
-rw-r--r--gdb/buildsym.h4
-rw-r--r--gdb/dwarfread.c5
-rw-r--r--gdb/elfread.c10
-rw-r--r--gdb/hpread.c6
-rw-r--r--gdb/mdebugread.c4
-rw-r--r--gdb/minsyms.c12
-rw-r--r--gdb/os9kread.c7
-rw-r--r--gdb/partial-stab.h44
-rw-r--r--gdb/somread.c9
-rw-r--r--gdb/xcoffread.c17
12 files changed, 120 insertions, 46 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0bd8350..759a6b5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,24 @@
+Mon Jan 8 10:20:14 1996 Jeffrey A Law (law@cygnus.com)
+
+ * buildsym.c (end_symtab): Remove sort_pending and sort_linevec
+ arguments. Sorting is now dependent on OBJF_REORDERED. All
+ callers/references changed.
+ * dbxread.c (read_ofile_symtab): Correctly determine value for
+ last_source_start_addr for reordered executables.
+ (process_one_symbol): Handle N_FUN with no name as an end of
+ function marker.
+ * partial-stab.h (case N_FN, N_TEXT): Don't assume CUR_SYMBOL_VALUE
+ is the high text address for a psymtab.
+ (case N_SO): Likewise.
+ (case N_FUN): Handle N_FUN with no name as an end of function
+ marker.
+ * minsyms.c (lookup_minimal_symbol_by_pc): Examine all symbols
+ at the same address rather than a random subset of them.
+ * coffread.c (coff_symfile_init): Set OBJF_REORDERED.
+ * elfread.c (elf_symfile_init): Similarly.
+ * somread.c (som_symfile_init): Similarly.
+ * xcoffread.c (xcoff_symfile_init): Similarly.
+
Fri Jan 5 17:46:01 1996 Stu Grossman (grossman@cygnus.com)
* stack.c (print_stack_frame print_frame_info) symmisc.c
diff --git a/gdb/buildsym.c b/gdb/buildsym.c
index c9c30b0..5a5847a 100644
--- a/gdb/buildsym.c
+++ b/gdb/buildsym.c
@@ -1,5 +1,5 @@
/* Support routines for building symbol tables in GDB's internal format.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1995
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1995, 1996
Free Software Foundation, Inc.
This file is part of GDB.
@@ -737,10 +737,8 @@ start_symtab (name, dirname, start_addr)
because then gdb will never know about this empty file (FIXME). */
struct symtab *
-end_symtab (end_addr, sort_pending, sort_linevec, objfile, section)
+end_symtab (end_addr, objfile, section)
CORE_ADDR end_addr;
- int sort_pending;
- int sort_linevec;
struct objfile *objfile;
int section;
{
@@ -774,14 +772,12 @@ end_symtab (end_addr, sort_pending, sort_linevec, objfile, section)
}
}
- /* It is unfortunate that in xcoff, pending blocks might not be ordered
- in this stage. Especially, blocks for static functions will show up at
- the end. We need to sort them, so tools like `find_pc_function' and
- `find_pc_block' can work reliably. */
-
- if (sort_pending && pending_blocks)
+ /* Reordered executables may have out of order pending blocks; if
+ OBJF_REORDERED is true, then sort the pending blocks. */
+ if ((objfile->flags & OBJF_REORDERED) && pending_blocks)
{
- /* FIXME! Remove this horrid bubble sort and use qsort!!! */
+ /* FIXME! Remove this horrid bubble sort and use qsort!!!
+ It'd be a whole lot easier if they weren't in a linked list!!! */
int swapped;
do
{
@@ -865,12 +861,11 @@ end_symtab (end_addr, sort_pending, sort_linevec, objfile, section)
subfile->line_vector = (struct linetable *)
xrealloc ((char *) subfile->line_vector, linetablesize);
#endif
- /* If sort_linevec is false, we might want just check to make
- sure they are sorted and complain() if not, as a way of
- tracking down compilers/symbol readers which don't get
- them sorted right. */
- if (sort_linevec)
+ /* Like the pending blocks, the line table may be scrambled
+ in reordered executables. Sort it if OBJF_REORDERED is
+ true. */
+ if (objfile->flags & OBJF_REORDERED)
qsort (subfile->line_vector->item,
subfile->line_vector->nitems,
sizeof (struct linetable_entry), compare_line_numbers);
diff --git a/gdb/buildsym.h b/gdb/buildsym.h
index 36732f0..58529c7 100644
--- a/gdb/buildsym.h
+++ b/gdb/buildsym.h
@@ -1,5 +1,5 @@
/* Build symbol tables in GDB's internal format.
- Copyright (C) 1986-1995 Free Software Foundation, Inc.
+ Copyright (C) 1986-1996 Free Software Foundation, Inc.
This file is part of GDB.
@@ -231,7 +231,7 @@ extern char *
pop_subfile PARAMS ((void));
extern struct symtab *
-end_symtab PARAMS ((CORE_ADDR, int, int, struct objfile *, int));
+end_symtab PARAMS ((CORE_ADDR, struct objfile *, int));
extern void
scan_file_globals PARAMS ((struct objfile *));
diff --git a/gdb/dwarfread.c b/gdb/dwarfread.c
index 41f2a6c..fa7c9a2 100644
--- a/gdb/dwarfread.c
+++ b/gdb/dwarfread.c
@@ -1,5 +1,6 @@
/* DWARF debugging format support for GDB.
- Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996
+ Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support. Portions based on dbxread.c,
mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port.
@@ -1926,7 +1927,7 @@ read_file_scope (dip, thisdie, enddie, objfile)
decode_line_numbers (lnbase);
process_dies (thisdie + dip -> die_length, enddie, objfile);
- symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile, 0);
+ symtab = end_symtab (dip -> at_high_pc, objfile, 0);
if (symtab != NULL)
{
symtab -> language = cu_language;
diff --git a/gdb/elfread.c b/gdb/elfread.c
index 0372abb..9a7a0fe 100644
--- a/gdb/elfread.c
+++ b/gdb/elfread.c
@@ -1,5 +1,5 @@
/* Read ELF (Executable and Linking Format) object files for GDB.
- Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
@@ -705,9 +705,13 @@ elf_symfile_finish (objfile)
just a stub. */
static void
-elf_symfile_init (ignore)
- struct objfile *ignore;
+elf_symfile_init (objfile)
+ struct objfile *objfile;
{
+ /* ELF objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
}
/* ELF specific parsing routine for section offsets.
diff --git a/gdb/hpread.c b/gdb/hpread.c
index 79d5ee4..bfd7330 100644
--- a/gdb/hpread.c
+++ b/gdb/hpread.c
@@ -1,5 +1,5 @@
/* Read hp debug symbols and convert to internal format, for GDB.
- Copyright 1993 Free Software Foundation, Inc.
+ Copyright 1993, 1996 Free Software Foundation, Inc.
This file is part of GDB.
@@ -1116,7 +1116,7 @@ hpread_expand_symtab (objfile, sym_offset, sym_size, text_offset, text_size,
current_objfile = NULL;
- return end_symtab (text_offset + text_size, 0, 0, objfile, 0);
+ return end_symtab (text_offset + text_size, objfile, 0);
}
@@ -1896,7 +1896,7 @@ hpread_process_one_debug_symbol (dn_bufp, name, section_offsets, objfile,
case DNTT_TYPE_MODULE:
/* Ending a module ends the symbol table for that module. */
valu = text_offset + text_size + offset;
- (void) end_symtab (valu, 0, 0, objfile, 0);
+ (void) end_symtab (valu, objfile, 0);
break;
case DNTT_TYPE_FUNCTION:
diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c
index 1c88f51..07dca2b 100644
--- a/gdb/mdebugread.c
+++ b/gdb/mdebugread.c
@@ -1,5 +1,5 @@
/* Read a symbol table in ECOFF format (Third-Eye).
- Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Free Software Foundation, Inc.
Original version contributed by Alessandro Forin (af@cs.cmu.edu) at
CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor
@@ -3271,7 +3271,7 @@ psymtab_to_symtab_1 (pst, filename)
else
complain (&stab_unknown_complaint, name);
}
- st = end_symtab (pst->texthigh, 0, 0, pst->objfile, SECT_OFF_TEXT);
+ st = end_symtab (pst->texthigh, pst->objfile, SECT_OFF_TEXT);
end_stabs ();
/* Sort the symbol table now, we are done adding symbols to it.
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index c020062..e36302e 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -1,5 +1,5 @@
/* GDB routines for manipulating the minimal symbol tables.
- Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
This file is part of GDB.
@@ -253,7 +253,6 @@ lookup_minimal_symbol_text (name, sfile, objf)
return NULL;
}
-
/* Search through the minimal symbol table for each objfile and find the
symbol whose address is the largest address that is still less than or
equal to PC. Returns a pointer to the minimal symbol if such a symbol
@@ -325,6 +324,15 @@ lookup_minimal_symbol_by_pc (pc)
lo = new;
}
}
+
+ /* If we have multiple symbols at the same address, we want
+ hi to point to the last one. That way we can find the
+ right symbol if it has an index greater than hi. */
+ while (hi < objfile -> minimal_symbol_count - 1
+ && (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
+ == SYMBOL_VALUE_ADDRESS (&msymbol[hi+1])))
+ hi++;
+
/* The minimal symbol indexed by hi now is the best one in this
objfile's minimal symbol table. See if it is the best one
overall. */
diff --git a/gdb/os9kread.c b/gdb/os9kread.c
index 110d4cf..bcdf308 100644
--- a/gdb/os9kread.c
+++ b/gdb/os9kread.c
@@ -1,5 +1,5 @@
/* Read os9/os9k symbol tables and convert to internal format, for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996
Free Software Foundation, Inc.
This file is part of GDB.
@@ -1409,8 +1409,7 @@ os9k_read_ofile_symtab (pst)
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, 0, 0, objfile,
- SECT_OFF_TEXT);
+ pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT);
end_stabs ();
}
@@ -1566,7 +1565,7 @@ os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
*p = '\0';
if (symfile_depth++ == 0) {
if (last_source_file) {
- end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT);
+ end_symtab (valu, objfile, SECT_OFF_TEXT);
end_stabs ();
}
start_stabs ();
diff --git a/gdb/partial-stab.h b/gdb/partial-stab.h
index 1ea1eb0..b01eb1e 100644
--- a/gdb/partial-stab.h
+++ b/gdb/partial-stab.h
@@ -1,5 +1,5 @@
/* Shared code to pre-read a stab (dbx-style), when building a psymtab.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Free Software Foundation, Inc.
This file is part of GDB.
@@ -103,7 +103,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
&& CUR_SYMBOL_VALUE >= pst->textlow)
{
END_PSYMTAB (pst, psymtab_include_list, includes_used,
- symnum * symbol_size, CUR_SYMBOL_VALUE,
+ symnum * symbol_size,
+ CUR_SYMBOL_VALUE > pst->texthigh
+ ? CUR_SYMBOL_VALUE : pst->texthigh,
dependency_list, dependencies_used);
pst = (struct partial_symtab *) 0;
includes_used = 0;
@@ -214,7 +216,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
if (pst)
{
END_PSYMTAB (pst, psymtab_include_list, includes_used,
- symnum * symbol_size, valu,
+ symnum * symbol_size,
+ valu > pst->texthigh ? valu : pst->texthigh,
dependency_list, dependencies_used);
pst = (struct partial_symtab *) 0;
includes_used = 0;
@@ -365,6 +368,22 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
SET_NAMESTRING();
+#ifdef DBXREAD_ONLY
+ /* See if this is an end of function stab. */
+ if (CUR_SYMBOL_TYPE == N_FUN && ! strcmp (namestring, ""))
+ {
+ unsigned long valu;
+
+ /* It's value is the size (in bytes) of the function for
+ function relative stabs, or the address of the function's
+ end for old style stabs. */
+ valu = CUR_SYMBOL_VALUE + last_function_start;
+ if (pst->texthigh == 0 || valu > pst->texthigh)
+ pst->texthigh = valu;
+ break;
+ }
+#endif
+
p = (char *) strchr (namestring, ':');
if (!p)
continue; /* Not a debugging symbol. */
@@ -527,6 +546,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
case 'f':
CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
#ifdef DBXREAD_ONLY
+ /* Keep track of the start of the last function so we
+ can handle end of function symbols. */
+ last_function_start = CUR_SYMBOL_VALUE;
/* Kludges for ELF/STABS with Sun ACC */
last_function_name = namestring;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
@@ -541,6 +563,13 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
startup_file_end = CUR_SYMBOL_VALUE;
#endif
/* End kludge. */
+
+ /* In reordered executables this function may lie outside
+ the bounds created by N_SO symbols. If that's the case
+ use the address of this function as the low bound for
+ the partial symbol table. */
+ if (pst->textlow == 0 || CUR_SYMBOL_VALUE < pst->textlow)
+ pst->textlow = CUR_SYMBOL_VALUE;
#endif /* DBXREAD_ONLY */
ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
VAR_NAMESPACE, LOC_BLOCK,
@@ -554,6 +583,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
case 'F':
CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
#ifdef DBXREAD_ONLY
+ /* Keep track of the start of the last function so we
+ can handle end of function symbols. */
+ last_function_start = CUR_SYMBOL_VALUE;
/* Kludges for ELF/STABS with Sun ACC */
last_function_name = namestring;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
@@ -568,6 +600,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
startup_file_end = CUR_SYMBOL_VALUE;
#endif
/* End kludge. */
+ /* In reordered executables this function may lie outside
+ the bounds created by N_SO symbols. If that's the case
+ use the address of this function as the low bound for
+ the partial symbol table. */
+ if (pst->textlow == 0 || CUR_SYMBOL_VALUE < pst->textlow)
+ pst->textlow = CUR_SYMBOL_VALUE;
#endif /* DBXREAD_ONLY */
ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
VAR_NAMESPACE, LOC_BLOCK,
diff --git a/gdb/somread.c b/gdb/somread.c
index 522b6b5..ab8d531 100644
--- a/gdb/somread.c
+++ b/gdb/somread.c
@@ -1,5 +1,5 @@
/* Read HP PA/Risc object files for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1996 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
@@ -408,13 +408,16 @@ som_symfile_finish (objfile)
hpread_symfile_finish (objfile);
}
-/* SOM specific initialization routine for reading symbols.
+/* SOM specific initialization routine for reading symbols. */
- Nothing SOM specific left to do anymore. */
static void
som_symfile_init (objfile)
struct objfile *objfile;
{
+ /* SOM objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
hpread_symfile_init (objfile);
}
diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c
index c94cb76..b553102 100644
--- a/gdb/xcoffread.c
+++ b/gdb/xcoffread.c
@@ -1,5 +1,5 @@
/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Free Software Foundation, Inc.
Derived from coffread.c, dbxread.c, and a lot of hacking.
Contributed by IBM Corporation.
@@ -1023,7 +1023,7 @@ read_xcoff_symtab (pst)
if (last_source_file)
{
pst->symtab =
- end_symtab (cur_src_end_addr, 1, 0, objfile, SECT_OFF_TEXT);
+ end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT);
end_stabs ();
}
@@ -1087,8 +1087,7 @@ read_xcoff_symtab (pst)
{
complete_symtab (filestring, file_start_addr);
cur_src_end_addr = file_end_addr;
- end_symtab (file_end_addr, 1, 0, objfile,
- SECT_OFF_TEXT);
+ end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
end_stabs ();
start_stabs ();
/* Give all csects for this source file the same
@@ -1203,7 +1202,7 @@ read_xcoff_symtab (pst)
complete_symtab (filestring, file_start_addr);
cur_src_end_addr = file_end_addr;
- end_symtab (file_end_addr, 1, 0, objfile, SECT_OFF_TEXT);
+ end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
end_stabs ();
/* XCOFF, according to the AIX 3.2 documentation, puts the filename
@@ -1393,7 +1392,7 @@ read_xcoff_symtab (pst)
complete_symtab (filestring, file_start_addr);
cur_src_end_addr = file_end_addr;
- s = end_symtab (file_end_addr, 1, 0, objfile, SECT_OFF_TEXT);
+ s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT);
/* When reading symbols for the last C_FILE of the objfile, try
to make sure that we set pst->symtab to the symtab for the
file, not to the _globals_ symtab. I'm not sure whether this
@@ -1844,6 +1843,12 @@ xcoff_symfile_init (objfile)
/* Allocate struct to keep track of the symfile */
objfile -> sym_private = xmmalloc (objfile -> md,
sizeof (struct coff_symfile_info));
+
+ /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
+
init_entry_point_info (objfile);
}