Thu Apr 3 15:10:30 1997 Michael Snyder <msnyder@cleaver.cygnus.com>

	Except for the two m32r modules, this checkin is for
	overlay support.

        * blockframe.c: blockvector_for_pc_sect(), block_for_pc_sect(),
        find_pc_sect_function(), find_pc_sect_partial_function(): new
        functions for debugging overlays; pc without section is ambiguous.
        * breakpoint.[ch]: add section pointer to breakpoint struct;
        add section argument to check_duplicates(); check section as well
        as pc in [breakpoint_here_p(), breakpoint_inserted_here_p(),
        breakpoint_thread_match(), bpstat_stop_status()];
        add section argument to describe_other_breakpoints();
        use INIT_SAL() macro to zero-out new sal structures;
        make resolve_sal_pc() fix up the sal's section as well as its pc;
        match on section + pc in clear_command() and delete_breakpoint();
        account for overlay sections in insert_breakpoints(),
        remove_breakpoint() and breakpoint_re_set_one();
        all this to support overlays where a PC is not unique.
        * exec.c: change xfer_memory() to handle overlay sections.
        * findvar.c: change read_var_value() to handle overlay sections.
        * frame.h: declaration for block_for_pc_sect() [blockframe.c].
        * infcmd.c: jump_command() warns against jumping into an overlay
        that's not in memory.  Also use INIT_SAL() to initialize sals.
        * infrun.c: wait_for_inferior() sets a flag to invalidate cached
        overlay state information; Also use INIT_SAL() to init sals.
        * m32r-rom.c: modify load routines to use LMA instead of VMA.
        * m32r-stub.c: mask exit value down to 8 bits; screen out any
        memory read/writes in the range 600000 to a00000, and ff680000
        to ff800000 (hangs because nothing is mapped there); fix strcpy().
        * maint.c: maintenance command "translate-address" supports overlays.
        * minsyms.c: lookup_minimal_symbol_by_pc_sect() supports overlays.
        * objfiles.[ch]: add ovly_mapped field to the obj_section struct;
        this constitutes gdb's internal overlay mapping table.  Add macro
        ALL_OBJSECTIONS() to loop thru the obj_structs and look at overlays.
        Add function find_pc_sect_section().
        * printcmd.c: modify print_address_symbolic() with overlay smarts;
        modify address_info() with overlay smarts; add function sym_info()
        to support the INFO SYMBOL command (translate address to symbol(s));
        modify disassemble_command() to work on unmapped overlays.
        * source.c: use INIT_SAL() to initialize sals.
        * symfile.[ch]: change generic_load() to use section's LMA address
        instead of VMA address, for overlay sections.
        Add numerous functions for finding a PC's section / overlay,
        translating between VMA and LMA address ranges, determining if an
        overlay section is mapped, etc.  Add several user commands for
        overlay debugging.  Add support for a "generic" form of automatically
        reading overlay mapping info from the inferior (based on the default
        (simple) overlay manager which Cygnus provides as an example).
        * symtab.[ch]: add functions find_pc_sect_symtab(),
        find_pc_sect_psymtab(), find_pc_sect_psymbol(), find_pc_sect_line()
        for lookup; modify lookup_symbol and decode_line_1() to use them;
        modify find_function_start_sal() to account for overlay sections;
        add macro INIT_SAL() for initializing struct symtab_and_line.
        * target.c: fix a comment in the declaration of target_ops.

1 files changed, 13 insertions, 0 deletions

diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 937d0d4..d90095d 100644
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -154,6 +154,9 @@ struct obj_section {
 
   /* Objfile this section is part of.  */
   struct objfile *objfile;
+
+  /* True if this "overlay section" is mapped into an "overlay region". */
+  int ovly_mapped;
 };
 
 /* The "objstats" structure provides a place for gdb to record some
@@ -454,6 +457,9 @@ have_minimal_symbols PARAMS ((void));
 extern struct obj_section *
 find_pc_section PARAMS((CORE_ADDR pc));
 
+extern struct obj_section *
+find_pc_sect_section PARAMS((CORE_ADDR pc, asection *section));
+
 extern int
 in_plt_section PARAMS ((CORE_ADDR, char *));
 
@@ -502,4 +508,11 @@ in_plt_section PARAMS ((CORE_ADDR, char *));
     if ((objfile)->msymbols)	 \
       ALL_OBJFILE_MSYMBOLS (objfile, m)
 
+#define ALL_OBJFILE_OSECTIONS(objfile, osect)	\
+  for (osect = objfile->sections; osect < objfile->sections_end; osect++)
+
+#define ALL_OBJSECTIONS(objfile, osect)		\
+  ALL_OBJFILES (objfile)			\
+    ALL_OBJFILE_OSECTIONS (objfile, osect)
+
 #endif	/* !defined (OBJFILES_H) */