2004-08-02 Andrew Cagney <cagney@gnu.org>
* dummy-frame.c: Include "gdb_string.h". (generic_save_call_dummy_addr, generic_push_dummy_frame) (generic_save_dummy_frame_tos): Delete. (dummy_frame_push): New function, replaces above. * dummy-frame.h: Update copyright. (dummy_frame_push): Declare. * frame.h (generic_save_dummy_frame_tos, generic_push_dummy_frame) (generic_save_call_dummy_addr): Delete declarations. * infcall.c: Include "dummy-frame.h". (call_function_by_hand): Add locals caller_regcache, caller_regcache_cleanup and dummy_id. Replace push_dummy_frame with call to frame_save_as_regcache plus cleanup. Delete calls to generic_save_call_dummy_addr and generic_save_dummy_frame_tos. Move clear_proceed_status to just before the resume, add call to dummy_frame_push (discard cleanup). * Makefile.in (infcall.o): Add $(dummy_frame_h). (dummy-frame.o): Add $(gdb_string_h).
This commit is contained in:
Andrew Cagney
parent
d67ec5db39
commit
96860204a5
|
|
@ -1,3 +1,23 @@
|
|||
2004-08-02 Andrew Cagney <cagney@gnu.org>
|
||||
|
||||
* dummy-frame.c: Include "gdb_string.h".
|
||||
(generic_save_call_dummy_addr, generic_push_dummy_frame)
|
||||
(generic_save_dummy_frame_tos): Delete.
|
||||
(dummy_frame_push): New function, replaces above.
|
||||
* dummy-frame.h: Update copyright.
|
||||
(dummy_frame_push): Declare.
|
||||
* frame.h (generic_save_dummy_frame_tos, generic_push_dummy_frame)
|
||||
(generic_save_call_dummy_addr): Delete declarations.
|
||||
* infcall.c: Include "dummy-frame.h".
|
||||
(call_function_by_hand): Add locals caller_regcache,
|
||||
caller_regcache_cleanup and dummy_id. Replace push_dummy_frame
|
||||
with call to frame_save_as_regcache plus cleanup. Delete calls to
|
||||
generic_save_call_dummy_addr and generic_save_dummy_frame_tos.
|
||||
Move clear_proceed_status to just before the resume, add call to
|
||||
dummy_frame_push (discard cleanup).
|
||||
* Makefile.in (infcall.o): Add $(dummy_frame_h).
|
||||
(dummy-frame.o): Add $(gdb_string_h).
|
||||
|
||||
2004-08-01 Andrew Cagney <cagney@gnu.org>
|
||||
|
||||
* dummy-frame.h (dummy_frame_unwind): Replace dummy_frame_sniffer.
|
||||
|
|
|
|||
|
|
@ -1828,7 +1828,7 @@ dsrec.o: dsrec.c $(defs_h) $(serial_h) $(srec_h) $(gdb_assert_h) \
|
|||
$(gdb_string_h)
|
||||
dummy-frame.o: dummy-frame.c $(defs_h) $(dummy_frame_h) $(regcache_h) \
|
||||
$(frame_h) $(inferior_h) $(gdb_assert_h) $(frame_unwind_h) \
|
||||
$(command_h) $(gdbcmd_h)
|
||||
$(command_h) $(gdbcmd_h) $(gdb_string_h)
|
||||
dve3900-rom.o: dve3900-rom.c $(defs_h) $(gdbcore_h) $(target_h) $(monitor_h) \
|
||||
$(serial_h) $(inferior_h) $(command_h) $(gdb_string_h) $(regcache_h) \
|
||||
$(mips_tdep_h)
|
||||
|
|
@ -2043,7 +2043,8 @@ ia64-tdep.o: ia64-tdep.c $(defs_h) $(inferior_h) $(gdbcore_h) \
|
|||
$(libunwind_frame_h) $(libunwind_ia64_h)
|
||||
infcall.o: infcall.c $(defs_h) $(breakpoint_h) $(target_h) $(regcache_h) \
|
||||
$(inferior_h) $(gdb_assert_h) $(block_h) $(gdbcore_h) $(language_h) \
|
||||
$(objfiles_h) $(gdbcmd_h) $(command_h) $(gdb_string_h) $(infcall_h)
|
||||
$(objfiles_h) $(gdbcmd_h) $(command_h) $(gdb_string_h) $(infcall_h) \
|
||||
$(dummy_frame_h)
|
||||
infcmd.o: infcmd.c $(defs_h) $(gdb_string_h) $(symtab_h) $(gdbtypes_h) \
|
||||
$(frame_h) $(inferior_h) $(environ_h) $(value_h) $(gdbcmd_h) \
|
||||
$(symfile_h) $(gdbcore_h) $(target_h) $(language_h) $(symfile_h) \
|
||||
|
|
|
|||
|
|
@ -31,6 +31,7 @@
|
|||
#include "frame-unwind.h"
|
||||
#include "command.h"
|
||||
#include "gdbcmd.h"
|
||||
#include "gdb_string.h"
|
||||
|
||||
static int pc_in_dummy_frame (CORE_ADDR pc);
|
||||
|
||||
|
|
@ -94,27 +95,24 @@ pc_in_dummy_frame (CORE_ADDR pc)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/* Save all the registers on the dummy frame stack. Most ports save the
|
||||
registers on the target stack. This results in lots of unnecessary memory
|
||||
references, which are slow when debugging via a serial line. Instead, we
|
||||
save all the registers internally, and never write them to the stack. The
|
||||
registers get restored when the called function returns to the entry point,
|
||||
where a breakpoint is laying in wait. */
|
||||
/* Push the caller's state, along with the dummy frame info, onto a
|
||||
dummy-frame stack. */
|
||||
|
||||
void
|
||||
generic_push_dummy_frame (void)
|
||||
dummy_frame_push (struct regcache *caller_regcache,
|
||||
const struct frame_id *dummy_id)
|
||||
{
|
||||
struct dummy_frame *dummy_frame;
|
||||
CORE_ADDR fp = get_frame_base (get_current_frame ());
|
||||
|
||||
/* check to see if there are stale dummy frames,
|
||||
perhaps left over from when a longjump took us out of a
|
||||
function that was called by the debugger */
|
||||
|
||||
/* Check to see if there are stale dummy frames, perhaps left over
|
||||
from when a longjump took us out of a function that was called by
|
||||
the debugger. */
|
||||
dummy_frame = dummy_frame_stack;
|
||||
while (dummy_frame)
|
||||
if (gdbarch_inner_than (current_gdbarch, dummy_frame->top, fp))
|
||||
/* stale -- destroy! */
|
||||
/* FIXME: cagney/2004-08-02: Should just test IDs. */
|
||||
if (gdbarch_inner_than (current_gdbarch, dummy_frame->top,
|
||||
dummy_id->stack_addr))
|
||||
/* Stale -- destroy! */
|
||||
{
|
||||
dummy_frame_stack = dummy_frame->next;
|
||||
regcache_xfree (dummy_frame->regcache);
|
||||
|
|
@ -124,31 +122,19 @@ generic_push_dummy_frame (void)
|
|||
else
|
||||
dummy_frame = dummy_frame->next;
|
||||
|
||||
dummy_frame = xmalloc (sizeof (struct dummy_frame));
|
||||
dummy_frame->regcache = frame_save_as_regcache (get_current_frame ());
|
||||
|
||||
dummy_frame->pc = read_pc ();
|
||||
dummy_frame->top = 0;
|
||||
dummy_frame->id = get_frame_id (get_current_frame ());
|
||||
dummy_frame = XZALLOC (struct dummy_frame);
|
||||
dummy_frame->regcache = caller_regcache;
|
||||
dummy_frame->id = (*dummy_id);
|
||||
/* FIXME: cagney/2004-08-02: Retain for compatibility - trust the
|
||||
ID. */
|
||||
dummy_frame->pc = dummy_id->code_addr;
|
||||
dummy_frame->top = dummy_id->stack_addr;
|
||||
dummy_frame->call_lo = dummy_id->code_addr + 0;
|
||||
dummy_frame->call_hi = dummy_id->code_addr + 1;
|
||||
dummy_frame->next = dummy_frame_stack;
|
||||
dummy_frame_stack = dummy_frame;
|
||||
}
|
||||
|
||||
void
|
||||
generic_save_dummy_frame_tos (CORE_ADDR sp)
|
||||
{
|
||||
dummy_frame_stack->top = sp;
|
||||
}
|
||||
|
||||
/* Record the upper/lower bounds on the address of the call dummy. */
|
||||
|
||||
void
|
||||
generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi)
|
||||
{
|
||||
dummy_frame_stack->call_lo = lo;
|
||||
dummy_frame_stack->call_hi = hi;
|
||||
}
|
||||
|
||||
/* Return the dummy frame cache, it contains both the ID, and a
|
||||
pointer to the regcache. */
|
||||
struct dummy_frame_cache
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
|
||||
|
||||
Copyright 2002 Free Software Foundation, Inc.
|
||||
Copyright 2002, 2004 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GDB.
|
||||
|
||||
|
|
@ -27,6 +27,22 @@ struct regcache;
|
|||
struct frame_unwind;
|
||||
struct frame_id;
|
||||
|
||||
/* Push the information needed to identify, and unwind from, a dummy
|
||||
frame onto the dummy frame stack. */
|
||||
|
||||
/* NOTE: cagney/2004-08-02: This interface will eventually need to be
|
||||
parameterized with the caller's thread - that will allow per-thread
|
||||
dummy-frame stacks and, hence, per-thread inferior function
|
||||
calls. */
|
||||
|
||||
/* NOTE: cagney/2004-08-02: In the case of ABIs using push_dummy_code
|
||||
containing more than one instruction, this interface many need to
|
||||
be expanded so that it knowns the lower/upper extent of the dummy
|
||||
frame's code. */
|
||||
|
||||
extern void dummy_frame_push (struct regcache *regcache,
|
||||
const struct frame_id *dummy_id);
|
||||
|
||||
/* If the PC falls in a dummy frame, return a dummy frame
|
||||
unwinder. */
|
||||
|
||||
|
|
|
|||
|
|
@ -521,8 +521,6 @@ extern void *frame_obstack_zalloc (unsigned long size);
|
|||
/* Create a regcache, and copy the frame's registers into it. */
|
||||
struct regcache *frame_save_as_regcache (struct frame_info *this_frame);
|
||||
|
||||
extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
|
||||
|
||||
extern struct block *get_frame_block (struct frame_info *,
|
||||
CORE_ADDR *addr_in_block);
|
||||
|
||||
|
|
@ -575,12 +573,8 @@ extern void print_frame_info (struct frame_info *, int print_level,
|
|||
|
||||
extern struct frame_info *block_innermost_frame (struct block *);
|
||||
|
||||
extern void generic_push_dummy_frame (void);
|
||||
|
||||
extern int deprecated_pc_in_call_dummy (CORE_ADDR pc);
|
||||
|
||||
extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
|
||||
|
||||
/* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
|
||||
function called get_frame_register_p(). This slightly weird (and
|
||||
older) variant of get_frame_register() returns zero (indicating the
|
||||
|
|
|
|||
|
|
@ -35,6 +35,7 @@
|
|||
#include "command.h"
|
||||
#include "gdb_string.h"
|
||||
#include "infcall.h"
|
||||
#include "dummy-frame.h"
|
||||
|
||||
/* NOTE: cagney/2003-04-16: What's the future of this code?
|
||||
|
||||
|
|
@ -308,6 +309,9 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
|
|||
CORE_ADDR real_pc;
|
||||
struct type *ftype = check_typedef (SYMBOL_TYPE (function));
|
||||
CORE_ADDR bp_addr;
|
||||
struct regcache *caller_regcache;
|
||||
struct cleanup *caller_regcache_cleanup;
|
||||
struct frame_id dummy_id;
|
||||
|
||||
if (!target_has_execution)
|
||||
noprocess ();
|
||||
|
|
@ -325,23 +329,12 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
|
|||
inf_status = save_inferior_status (1);
|
||||
inf_status_cleanup = make_cleanup_restore_inferior_status (inf_status);
|
||||
|
||||
/* FIXME: cagney/2003-02-26: Step zero of this little tinker is to
|
||||
extract the generic dummy frame code from the architecture
|
||||
vector. Hence this direct call.
|
||||
|
||||
A follow-on change is to modify this interface so that it takes
|
||||
thread OR frame OR ptid as a parameter, and returns a dummy frame
|
||||
handle. The handle can then be used further down as a parameter
|
||||
to generic_save_dummy_frame_tos(). Hmm, thinking about it, since
|
||||
everything is ment to be using generic dummy frames, why not even
|
||||
use some of the dummy frame code to here - do a regcache dup and
|
||||
then pass the duped regcache, along with all the other stuff, at
|
||||
one single point.
|
||||
|
||||
In fact, you can even save the structure's return address in the
|
||||
dummy frame and fix one of those nasty lost struct return edge
|
||||
conditions. */
|
||||
generic_push_dummy_frame ();
|
||||
/* Save the caller's registers so that they can be restored once the
|
||||
callee returns. To allow nested calls the registers are (further
|
||||
down) pushed onto a dummy frame stack. Include a cleanup (which
|
||||
is tossed once the regcache has been pushed). */
|
||||
caller_regcache = frame_save_as_regcache (get_current_frame ());
|
||||
caller_regcache_cleanup = make_cleanup_regcache_xfree (caller_regcache);
|
||||
|
||||
/* Ensure that the initial SP is correctly aligned. */
|
||||
{
|
||||
|
|
@ -491,10 +484,6 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
|
|||
internal_error (__FILE__, __LINE__, "bad switch");
|
||||
}
|
||||
|
||||
/* Save where the breakpoint is going to be inserted so that the
|
||||
dummy-frame code is later able to re-identify it. */
|
||||
generic_save_call_dummy_addr (bp_addr, bp_addr + 1);
|
||||
|
||||
if (nargs < TYPE_NFIELDS (ftype))
|
||||
error ("too few arguments in function call");
|
||||
|
||||
|
|
@ -660,36 +649,44 @@ You must use a pointer to function type variable. Command ignored.", arg_name);
|
|||
else
|
||||
error ("This target does not support function calls");
|
||||
|
||||
/* Set up a frame ID for the dummy frame so we can pass it to
|
||||
set_momentary_breakpoint. We need to give the breakpoint a frame
|
||||
ID so that the breakpoint code can correctly re-identify the
|
||||
dummy breakpoint. */
|
||||
/* Sanity. The exact same SP value is returned by PUSH_DUMMY_CALL,
|
||||
saved as the dummy-frame TOS, and used by unwind_dummy_id to form
|
||||
the frame ID's stack address. */
|
||||
generic_save_dummy_frame_tos (sp);
|
||||
dummy_id = frame_id_build (sp, bp_addr);
|
||||
|
||||
/* Now proceed, having reached the desired place. */
|
||||
clear_proceed_status ();
|
||||
|
||||
/* Create a momentary breakpoint at the return address of the
|
||||
inferior. That way it breaks when it returns. */
|
||||
|
||||
{
|
||||
struct breakpoint *bpt;
|
||||
struct symtab_and_line sal;
|
||||
struct frame_id frame;
|
||||
init_sal (&sal); /* initialize to zeroes */
|
||||
sal.pc = bp_addr;
|
||||
sal.section = find_pc_overlay (sal.pc);
|
||||
/* Set up a frame ID for the dummy frame so we can pass it to
|
||||
set_momentary_breakpoint. We need to give the breakpoint a
|
||||
frame ID so that the breakpoint code can correctly re-identify
|
||||
the dummy breakpoint. */
|
||||
/* Sanity. The exact same SP value is returned by
|
||||
PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
|
||||
unwind_dummy_id to form the frame ID's stack address. */
|
||||
frame = frame_id_build (sp, sal.pc);
|
||||
bpt = set_momentary_breakpoint (sal, frame, bp_call_dummy);
|
||||
bpt = set_momentary_breakpoint (sal, dummy_id, bp_call_dummy);
|
||||
bpt->disposition = disp_del;
|
||||
}
|
||||
|
||||
/* Everything's ready, push all the info needed to restore the
|
||||
caller (and identify the dummy-frame) onto the dummy-frame
|
||||
stack. */
|
||||
dummy_frame_push (caller_regcache, &dummy_id);
|
||||
discard_cleanups (caller_regcache_cleanup);
|
||||
|
||||
/* - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP -
|
||||
If you're looking to implement asynchronous dummy-frames, then
|
||||
just below is the place to chop this function in two.. */
|
||||
|
||||
/* Now proceed, having reached the desired place. */
|
||||
clear_proceed_status ();
|
||||
|
||||
/* Execute a "stack dummy", a piece of code stored in the stack by
|
||||
the debugger to be executed in the inferior.
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue