/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
- Foundation, Inc.
+ 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
+ Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "gdb_assert.h"
#include "frame-unwind.h"
+#include "command.h"
+#include "gdbcmd.h"
static void dummy_frame_this_id (struct frame_info *next_frame,
void **this_prologue_cache,
struct frame_id *this_id);
+static int pc_in_dummy_frame (CORE_ADDR pc);
+
/* Dummy frame. This saves the processor state just prior to setting
up the inferior function call. Older targets save the registers
on the target stack (but that really slows down function calls). */
FP against the saved SP and FP. NOTE: If you're trying
to fix a problem with GDB not correctly finding a dummy
frame, check the comments that go with FRAME_ALIGN() and
- SAVE_DUMMY_FRAME_TOS(). */
+ UNWIND_DUMMY_ID(). */
if (fp != dummyframe->fp && fp != dummyframe->sp)
continue;
}
return NULL;
}
-struct regcache *
-generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp)
+static struct regcache *
+deprecated_find_dummy_frame_regcache (CORE_ADDR pc, CORE_ADDR fp)
{
struct dummy_frame *dummy = find_dummy_frame (pc, fp);
if (dummy != NULL)
char *
deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp)
{
- struct regcache *regcache = generic_find_dummy_frame (pc, fp);
+ struct regcache *regcache = deprecated_find_dummy_frame_regcache (pc, fp);
if (regcache == NULL)
return NULL;
return deprecated_grub_regcache_for_registers (regcache);
}
-/* Function: pc_in_call_dummy (pc, sp, fp)
+/* Function: pc_in_call_dummy (pc)
Return true if the PC falls in a dummy frame created by gdb for an
inferior call. The code below which allows DECR_PC_AFTER_BREAK is
subtracted out. */
int
-generic_pc_in_call_dummy (CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR fp)
+deprecated_pc_in_call_dummy (CORE_ADDR pc)
{
return pc_in_dummy_frame (pc);
}
FIXME: cagney/2002-11-23: This is silly. Surely "infrun.c" can
figure out what the real PC (as in the resume address) is BEFORE
- calling this function (Oh, and I'm not even sure that this function
- is called with an decremented PC, the call to pc_in_call_dummy() in
- that file is conditional on !CALL_DUMMY_BREAKPOINT_OFFSET_P yet
- generic dummy targets set CALL_DUMMY_BREAKPOINT_OFFSET. True?). */
+ calling this function. */
-int
+static int
pc_in_dummy_frame (CORE_ADDR pc)
{
struct dummy_frame *dummyframe;
CORE_ADDR
deprecated_read_register_dummy (CORE_ADDR pc, CORE_ADDR fp, int regno)
{
- struct regcache *dummy_regs = generic_find_dummy_frame (pc, fp);
+ struct regcache *dummy_regs = deprecated_find_dummy_frame_regcache (pc, fp);
if (dummy_regs)
{
/* NOTE: cagney/2002-08-12: Replaced a call to
regcache_raw_read_as_address() with a call to
regcache_cooked_read_unsigned(). The old, ...as_address
- function was eventually calling extract_unsigned_integer (via
+ function was eventually calling extract_unsigned_integer (nee
extract_address) to unpack the registers value. The below is
doing an unsigned extract so that it is functionally
equivalent. The read needs to be cooked as, otherwise, it
dummy_frame_stack->call_hi = hi;
}
-/* Restore the machine state from either the saved dummy stack or a
- real stack frame. */
-
-void
-generic_pop_current_frame (void (*popper) (struct frame_info * frame))
-{
- struct frame_info *frame = get_current_frame ();
- if (get_frame_type (frame) == DUMMY_FRAME)
- /* NOTE: cagney/2002-22-23: Does this ever occure? Surely a dummy
- frame will have already been poped by the "infrun.c" code. */
- generic_pop_dummy_frame ();
- else
- (*popper) (frame);
-}
-
/* Discard the innermost dummy frame from the dummy frame stack
(passed in as a parameter). */
}
void
-generic_pop_dummy_frame (void)
+deprecated_pop_dummy_frame (void)
{
struct dummy_frame *dummy_frame = dummy_frame_stack;
just asking for trouble. */
if (gdbarch_unwind_dummy_id_p (current_gdbarch))
{
- /* Assume call_function_by_hand(), via SAVE_DUMMY_FRAME_TOS,
- previously saved the dummy frame's ID. Things only work if
- the two return the same value. */
- gdb_assert (SAVE_DUMMY_FRAME_TOS_P ());
/* Use an architecture specific method to extract the prev's
dummy ID from the next frame. Note that this method uses
frame_register_unwind to obtain the register values needed to
determine the dummy frame's ID. */
(*this_id) = gdbarch_unwind_dummy_id (current_gdbarch, next_frame);
}
- else if (frame_relative_level (next_frame) < 0)
+ else if (get_frame_type (next_frame) == SENTINEL_FRAME)
{
/* We're unwinding a sentinel frame, the PC of which is pointing
at a stack dummy. Fake up the dummy frame's ID using the
same sequence as is found a traditional unwinder. Once all
architectures supply the unwind_dummy_id method, this code
can go away. */
- (*this_id).base = read_fp ();
- (*this_id).pc = read_pc ();
+ (*this_id) = frame_id_build (deprecated_read_fp (), read_pc ());
}
else if (legacy_frame_p (current_gdbarch)
&& get_prev_frame (next_frame))
get_prev_frame code has already created THIS frame and linked
it in to the frame chain (a pretty bold assumption), extract
the ID from THIS base / pc. */
- (*this_id).base = get_frame_base (get_prev_frame (next_frame));
- (*this_id).pc = get_frame_pc (get_prev_frame (next_frame));
+ (*this_id) = frame_id_build (get_frame_base (get_prev_frame (next_frame)),
+ get_frame_pc (get_prev_frame (next_frame)));
}
else
{
- /* Outch! We're not trying to find the innermost frame's ID yet
+ /* Ouch! We're not trying to find the innermost frame's ID yet
we're trying to unwind to a dummy. The architecture must
provide the unwind_dummy_id() method. Abandon the unwind
process but only after first warning the user. */
(*this_id) = null_frame_id;
return;
}
- (*this_prologue_cache) = find_dummy_frame ((*this_id).pc, (*this_id).base);
+ (*this_prologue_cache) = find_dummy_frame ((*this_id).code_addr,
+ (*this_id).stack_addr);
}
static struct frame_unwind dummy_frame_unwind =
{
+ DUMMY_FRAME,
dummy_frame_this_id,
dummy_frame_prev_register
};
const struct frame_unwind *
-dummy_frame_p (CORE_ADDR pc)
+dummy_frame_sniffer (struct frame_info *next_frame)
{
- if (DEPRECATED_PC_IN_CALL_DUMMY_P ()
- ? DEPRECATED_PC_IN_CALL_DUMMY (pc, 0, 0)
- : pc_in_dummy_frame (pc))
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ if (pc_in_dummy_frame (pc))
return &dummy_frame_unwind;
else
return NULL;
}
+
+static void
+fprint_dummy_frames (struct ui_file *file)
+{
+ struct dummy_frame *s;
+ for (s = dummy_frame_stack; s != NULL; s = s->next)
+ {
+ gdb_print_host_address (s, file);
+ fprintf_unfiltered (file, ":");
+ fprintf_unfiltered (file, " pc=0x%s", paddr (s->pc));
+ fprintf_unfiltered (file, " fp=0x%s", paddr (s->fp));
+ fprintf_unfiltered (file, " sp=0x%s", paddr (s->sp));
+ fprintf_unfiltered (file, " top=0x%s", paddr (s->top));
+ fprintf_unfiltered (file, " id=");
+ fprint_frame_id (file, s->id);
+ fprintf_unfiltered (file, " call_lo=0x%s", paddr (s->call_lo));
+ fprintf_unfiltered (file, " call_hi=0x%s", paddr (s->call_hi));
+ fprintf_unfiltered (file, "\n");
+ }
+}
+
+static void
+maintenance_print_dummy_frames (char *args, int from_tty)
+{
+ if (args == NULL)
+ fprint_dummy_frames (gdb_stdout);
+ else
+ {
+ struct ui_file *file = gdb_fopen (args, "w");
+ if (file == NULL)
+ perror_with_name ("maintenance print dummy-frames");
+ fprint_dummy_frames (file);
+ ui_file_delete (file);
+ }
+}
+
+extern void _initialize_dummy_frame (void);
+
+void
+_initialize_dummy_frame (void)
+{
+ add_cmd ("dummy-frames", class_maintenance, maintenance_print_dummy_frames,
+ "Print the contents of the internal dummy-frame stack.",
+ &maintenanceprintlist);
+
+}
projects / deliverable / binutils-gdb.git / blobdiff