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* nlmread.c (nlm_symtab_read): Clean up a bit.

Browse source 
* (nlm_symfile_read):  Record bounds of main() so that backtrace
	command will know where to stop.
	* objfiles.c (objfile_relocate):  Relocate entry point/func info
	for backtrace as well.
	* objfiles.h:  Define values for invalid PCs for entry point info.
	* symfile.c (init_entry_point_info):  Initialize invalid values
	with aforementioned macros.
	* config/alpha/tm-alphanw.h:  Turn on FRAME_CHAIN_VALID_ALTERNATE
	to cause backtrace to stop when it gets back to main().
	* config/i386/tm-i386nw.h:  Ditto.
This commit is contained in:
Stu Grossman 1994-06-09 06:30:38 +00:00
parent 5005cbca02
commit a4b4f52058
6 changed files with 72 additions and 15 deletions
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14
gdb/ChangeLog
View file

@ -1,3 +1,17 @@
Wed Jun 8 23:20:45 1994 Stu Grossman (grossman@cygnus.com)
* nlmread.c (nlm_symtab_read): Clean up a bit.
* (nlm_symfile_read): Record bounds of main() so that backtrace
command will know where to stop.
* objfiles.c (objfile_relocate): Relocate entry point/func info
for backtrace as well.
* objfiles.h: Define values for invalid PCs for entry point info.
* symfile.c (init_entry_point_info): Initialize invalid values
with aforementioned macros.
* config/alpha/tm-alphanw.h: Turn on FRAME_CHAIN_VALID_ALTERNATE
to cause backtrace to stop when it gets back to main().
* config/i386/tm-i386nw.h: Ditto.
Sat Jun 4 18:17:03 1994 Per Bothner (bothner@kalessin.cygnus.com)
Fix value_print, which used to be ostensibly langauge-indepentdent,

4
gdb/config/alpha/tm-alphanw.h
View file

@ -8,3 +8,7 @@
#define VM_MIN_ADDRESS ((CORE_ADDR)0)
#include "alpha/tm-alpha.h"
/* Stop backtracing when we wander into main. */
#define FRAME_CHAIN_VALID_ALTERNATE

8
gdb/config/i386/tm-i386nw.h
View file

@ -1,5 +1,5 @@
/* Macro definitions for i386 running under Univel NetWare.
Copyright 1993 Free Software Foundation, Inc.
/* Macro definitions for i386 running NetWare.
Copyright 1993, 1994 Free Software Foundation, Inc.
This file is part of GDB.
@ -25,3 +25,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
be extracted out and placed in a tm-i386.h file that all the others,
including tm-i386v.h, includes as needed. */
#include "i386/tm-i386v.h"
/* Stop backtracing when we wander into main. */
#define FRAME_CHAIN_VALID_ALTERNATE

29
gdb/nlmread.c
View file

@ -150,25 +150,18 @@ nlm_symtab_read (abfd, addr, objfile)
symaddr = sym -> value + sym -> section -> vma;
/* Relocate all non-absolute symbols by base address. */
if (sym -> section != &bfd_abs_section)
{
symaddr += addr;
}
symaddr += addr;
/* For non-absolute symbols, use the type of the section
they are relative to, to intuit text/data. Bfd provides
they are relative to, to intuit text/data. BFD provides
no way of figuring this out for absolute symbols. */
if (sym -> section -> flags & SEC_CODE)
{
ms_type = mst_text;
}
ms_type = mst_text;
else if (sym -> section -> flags & SEC_DATA)
{
ms_type = mst_data;
}
ms_type = mst_data;
else
{
ms_type = mst_unknown;
}
ms_type = mst_unknown;
record_minimal_symbol ((char *) sym -> name, symaddr, ms_type,
objfile);
}
@ -214,6 +207,7 @@ nlm_symfile_read (objfile, section_offsets, mainline)
bfd *abfd = objfile -> obfd;
struct cleanup *back_to;
CORE_ADDR offset;
struct symbol *mainsym;
init_minimal_symbol_collection ();
back_to = make_cleanup (discard_minimal_symbols, 0);
@ -230,6 +224,15 @@ nlm_symfile_read (objfile, section_offsets, mainline)
stabsect_build_psymtabs (objfile, section_offsets, mainline, ".stab",
".stabstr");
mainsym = lookup_symbol ("main", NULL, VAR_NAMESPACE, NULL, NULL);
if (mainsym
&& mainsym->class == LOC_BLOCK)
{
objfile->ei.main_func_lowpc = BLOCK_START (SYMBOL_BLOCK_VALUE (mainsym));
objfile->ei.main_func_highpc = BLOCK_END (SYMBOL_BLOCK_VALUE (mainsym));
}
/* FIXME: We could locate and read the optional native debugging format
here and add the symbols to the minimal symbol table. */

21
gdb/objfiles.c
View file

@ -578,6 +578,27 @@ objfile_relocate (objfile, new_offsets)
}
}
}
if (objfile->ei.entry_point != ~0)
objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT);
if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC)
{
objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT);
objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT);
}
if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC)
{
objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT);
objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT);
}
if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC)
{
objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT);
objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT);
}
}
/* Many places in gdb want to test just to see if we have any partial

11
gdb/objfiles.h
View file

@ -93,6 +93,8 @@ struct entry_info
CORE_ADDR entry_point;
#define INVALID_ENTRY_POINT (~0) /* ~0 will not be in any file, we hope. */
/* Start (inclusive) and end (exclusive) of function containing the
entry point. */
@ -110,6 +112,15 @@ struct entry_info
CORE_ADDR main_func_lowpc;
CORE_ADDR main_func_highpc;
/* Use these values when any of the above ranges is invalid. */
/* We use these values because it guarantees that there is no number that is
both >= LOWPC && < HIGHPC. It is also highly unlikely that 3 is a valid
module or function start address (as opposed to 0). */
#define INVALID_ENTRY_LOWPC (3)
#define INVALID_ENTRY_HIGHPC (1)
};