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2002-09-30 Andrew Cagney <ac131313@redhat.com>

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* mips-tdep.c (mips_frame_saved_pc): When a generic dummy frame,
	use frame_unwind_signed_register to obtain the PC.
	(mips_frame_chain): Handle a generic dummy frame.
	(mips_init_extra_frame_info): When a generic dummy frame, don't
	re-compute the frame base.
	(mips_pop_frame): Handle generic dummy frames.
	(mips_gdbarch_init): When generic dummy frames, set
	use_generic_dummy_frames, push_dummy_frame to
	generic_push_dummy_frame, pc_in_call_dummy to
	generic_pc_in_call_dummy, and save_dummy_frame_top_of_stack to
	generic_save_dummy_frame_tos.
This commit is contained in:
Andrew Cagney 2002-10-01 01:30:10 +00:00
parent 68315eb83a
commit cedea778f2
2 changed files with 68 additions and 4 deletions
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14
gdb/ChangeLog
View File

@ -1,3 +1,17 @@
2002-09-30 Andrew Cagney <ac131313@redhat.com>
* mips-tdep.c (mips_frame_saved_pc): When a generic dummy frame,
use frame_unwind_signed_register to obtain the PC.
(mips_frame_chain): Handle a generic dummy frame.
(mips_init_extra_frame_info): When a generic dummy frame, don't
re-compute the frame base.
(mips_pop_frame): Handle generic dummy frames.
(mips_gdbarch_init): When generic dummy frames, set
use_generic_dummy_frames, push_dummy_frame to
generic_push_dummy_frame, pc_in_call_dummy to
generic_pc_in_call_dummy, and save_dummy_frame_top_of_stack to
generic_save_dummy_frame_tos.
2002-09-30 Andrew Cagney <ac131313@redhat.com>
* blockframe.c (generic_find_dummy_frame): Rewrite. Only test

58
gdb/mips-tdep.c
View File

@ -1704,7 +1704,14 @@ mips_frame_saved_pc (struct frame_info *frame)
int pcreg = frame->signal_handler_caller ? PC_REGNUM
: (proc_desc ? PROC_PC_REG (proc_desc) : RA_REGNUM);
if (proc_desc && PROC_DESC_IS_DUMMY (proc_desc))
if (USE_GENERIC_DUMMY_FRAMES
&& PC_IN_CALL_DUMMY (frame->pc, 0, 0))
{
LONGEST tmp;
frame_unwind_signed_register (frame, PC_REGNUM, &tmp);
saved_pc = tmp;
}
else if (proc_desc && PROC_DESC_IS_DUMMY (proc_desc))
saved_pc = read_memory_integer (frame->frame - MIPS_SAVED_REGSIZE, MIPS_SAVED_REGSIZE);
else
saved_pc = read_next_frame_reg (frame, pcreg);
@ -2421,6 +2428,15 @@ mips_frame_chain (struct frame_info *frame)
if ((tmp = SKIP_TRAMPOLINE_CODE (saved_pc)) != 0)
saved_pc = tmp;
if (USE_GENERIC_DUMMY_FRAMES
&& PC_IN_CALL_DUMMY (saved_pc, 0, 0))
{
/* A dummy frame, uses SP not FP. Get the old SP value. If all
is well, frame->frame the bottom of the current frame will
contain that value. */
return frame->frame;
}
/* Look up the procedure descriptor for this PC. */
proc_desc = find_proc_desc (saved_pc, frame, 1);
if (!proc_desc)
@ -2436,8 +2452,10 @@ mips_frame_chain (struct frame_info *frame)
/* The previous frame from a sigtramp frame might be frameless
and have frame size zero. */
&& !frame->signal_handler_caller
/* Check if this is a call dummy frame. */
&& frame->pc != CALL_DUMMY_ADDRESS ())
/* For a generic dummy frame, let get_frame_pointer() unwind a
register value saved as part of the dummy frame call. */
&& !(USE_GENERIC_DUMMY_FRAMES
&& PC_IN_CALL_DUMMY (frame->pc, 0, 0)))
return 0;
else
return get_frame_pointer (frame, proc_desc);
@ -2467,6 +2485,15 @@ mips_init_extra_frame_info (int fromleaf, struct frame_info *fci)
if (fci->pc == PROC_LOW_ADDR (proc_desc)
&& !PROC_DESC_IS_DUMMY (proc_desc))
fci->frame = read_next_frame_reg (fci->next, SP_REGNUM);
else if (USE_GENERIC_DUMMY_FRAMES
&& PC_IN_CALL_DUMMY (fci->pc, 0, 0))
/* Do not ``fix'' fci->frame. It will have the value of the
generic dummy frame's top-of-stack (since the draft
fci->frame is obtained by returning the unwound stack
pointer) and that is what we want. That way the fci->frame
value will match the top-of-stack value that was saved as
part of the dummy frames data. */
/* Do nothing. */;
else
fci->frame = get_frame_pointer (fci->next, proc_desc);
@ -3783,9 +3810,16 @@ mips_pop_frame (void)
register int regnum;
struct frame_info *frame = get_current_frame ();
CORE_ADDR new_sp = FRAME_FP (frame);
mips_extra_func_info_t proc_desc = frame->extra_info->proc_desc;
if (USE_GENERIC_DUMMY_FRAMES
&& PC_IN_CALL_DUMMY (frame->pc, 0, 0))
{
generic_pop_dummy_frame ();
flush_cached_frames ();
return;
}
write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
if (frame->saved_regs == NULL)
FRAME_INIT_SAVED_REGS (frame);
@ -5956,22 +5990,38 @@ mips_gdbarch_init (struct gdbarch_info info,
set_gdbarch_call_dummy_p (gdbarch, 1);
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
#if OLD_STYLE_MIPS_DUMMY_FRAMES
set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
#else
set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
#endif
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
set_gdbarch_call_dummy_address (gdbarch, mips_call_dummy_address);
set_gdbarch_push_return_address (gdbarch, mips_push_return_address);
#if OLD_STYLE_MIPS_DUMMY_FRAMES
set_gdbarch_push_dummy_frame (gdbarch, mips_push_dummy_frame);
#else
set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
#endif
set_gdbarch_pop_frame (gdbarch, mips_pop_frame);
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
set_gdbarch_call_dummy_length (gdbarch, 0);
set_gdbarch_fix_call_dummy (gdbarch, mips_fix_call_dummy);
#if OLD_STYLE_MIPS_DUMMY_FRAMES
set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
#else
set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
#endif
set_gdbarch_call_dummy_words (gdbarch, mips_call_dummy_words);
set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (mips_call_dummy_words));
set_gdbarch_push_return_address (gdbarch, mips_push_return_address);
set_gdbarch_frame_align (gdbarch, mips_frame_align);
#if OLD_STYLE_MIPS_DUMMY_FRAMES
#else
set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
#endif
set_gdbarch_register_convertible (gdbarch, mips_register_convertible);
set_gdbarch_register_convert_to_virtual (gdbarch,
mips_register_convert_to_virtual);