a9e5fdc219
* gdbarch.sh (UNWIND_SP): Add. * gdbarch.h, gdbarch.c: Re-generate. * frame.c (frame_sp_unwind): New function. (get_frame_sp): New function. * frame.h (get_frame_sp, frame_sp_unwind): Declare. * regcache.c (read_sp): Rewrite, try each of TARGET_READ_SP, gdbarch_unwind_sp and SP_REGNUM when looking for the SP register value. * d10v-tdep.c (d10v_unwind_sp): Replace d10v_read_sp. (d10v_gdbarch_init): Set unwind_sp instead of read_sp. 2003-06-08 Andrew Cagney <cagney@redhat.com> * gdbint.texinfo (Target Architecture Definition): Document "unwind_sp". Cross reference "unwind_sp" and TARGET_READ_SP.
658 lines
28 KiB
C
658 lines
28 KiB
C
/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
|
|
|
|
Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996,
|
|
1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#if !defined (FRAME_H)
|
|
#define FRAME_H 1
|
|
|
|
struct symtab_and_line;
|
|
struct frame_unwind;
|
|
struct frame_base;
|
|
struct block;
|
|
struct gdbarch;
|
|
struct ui_file;
|
|
|
|
/* A legacy unwinder to prop up architectures using the old style
|
|
saved regs array. */
|
|
extern const struct frame_unwind *legacy_saved_regs_unwind;
|
|
|
|
/* The frame object. */
|
|
|
|
struct frame_info;
|
|
|
|
/* The frame object's ID. This provides a per-frame unique identifier
|
|
that can be used to relocate a `struct frame_info' after a target
|
|
resume or a frame cache destruct. It of course assumes that the
|
|
inferior hasn't unwound the stack past that frame. */
|
|
|
|
struct frame_id
|
|
{
|
|
/* The frame's stack address. This shall be constant through out
|
|
the lifetime of a frame. Note that this requirement applies to
|
|
not just the function body, but also the prologue and (in theory
|
|
at least) the epilogue. Since that value needs to fall either on
|
|
the boundary, or within the frame's address range, the frame's
|
|
outer-most address (the inner-most address of the previous frame)
|
|
is used. Watch out for all the legacy targets that still use the
|
|
function pointer register or stack pointer register. They are
|
|
wrong. */
|
|
/* NOTE: cagney/2002-11-16: The ia64 has two stacks and hence two
|
|
frame bases. This will need to be expanded to accomodate that. */
|
|
CORE_ADDR stack_addr;
|
|
/* The frame's code address. This shall be constant through out the
|
|
lifetime of the frame. While the PC (a.k.a. resume address)
|
|
changes as the function is executed, this code address cannot.
|
|
Typically, it is set to the address of the entry point of the
|
|
frame's function (as returned by frame_func_unwind(). */
|
|
CORE_ADDR code_addr;
|
|
};
|
|
|
|
/* Methods for constructing and comparing Frame IDs.
|
|
|
|
NOTE: Given frameless functions A and B, where A calls B (and hence
|
|
B is inner-to A). The relationships: !eq(A,B); !eq(B,A);
|
|
!inner(A,B); !inner(B,A); all hold. This is because, while B is
|
|
inner to A, B is not strictly inner to A (being frameless, they
|
|
have the same .base value). */
|
|
|
|
/* For convenience. All fields are zero. */
|
|
extern const struct frame_id null_frame_id;
|
|
|
|
/* Construct a frame ID. The first parameter is the frame's constant
|
|
stack address (typically the outer-bound), and the second the
|
|
frame's constant code address (typically the entry point) (or zero,
|
|
to indicate a wild card). */
|
|
extern struct frame_id frame_id_build (CORE_ADDR stack_addr,
|
|
CORE_ADDR code_addr);
|
|
|
|
/* Returns non-zero when L is a valid frame (a valid frame has a
|
|
non-zero .base). */
|
|
extern int frame_id_p (struct frame_id l);
|
|
|
|
/* Returns non-zero when L and R identify the same frame, or, if
|
|
either L or R have a zero .func, then the same frame base. */
|
|
extern int frame_id_eq (struct frame_id l, struct frame_id r);
|
|
|
|
/* Returns non-zero when L is strictly inner-than R (they have
|
|
different frame .bases). Neither L, nor R can be `null'. See note
|
|
above about frameless functions. */
|
|
extern int frame_id_inner (struct frame_id l, struct frame_id r);
|
|
|
|
/* Write the internal representation of a frame ID on the specified
|
|
stream. */
|
|
extern void fprint_frame_id (struct ui_file *file, struct frame_id id);
|
|
|
|
|
|
/* For every stopped thread, GDB tracks two frames: current and
|
|
selected. Current frame is the inner most frame of the selected
|
|
thread. Selected frame is the one being examined by the the GDB
|
|
CLI (selected using `up', `down', ...). The frames are created
|
|
on-demand (via get_prev_frame()) and then held in a frame cache. */
|
|
/* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
|
|
sequence: `thread 1; up; thread 2; thread 1' you loose thread 1's
|
|
selected frame. At present GDB only tracks the selected frame of
|
|
the current thread. But be warned, that might change. */
|
|
/* FIXME: cagney/2002-11-14: At any time, only one thread's selected
|
|
and current frame can be active. Switching threads causes gdb to
|
|
discard all that cached frame information. Ulgh! Instead, current
|
|
and selected frame should be bound to a thread. */
|
|
|
|
/* On demand, create the inner most frame using information found in
|
|
the inferior. If the inner most frame can't be created, throw an
|
|
error. */
|
|
extern struct frame_info *get_current_frame (void);
|
|
|
|
/* Invalidates the frame cache (this function should have been called
|
|
invalidate_cached_frames).
|
|
|
|
FIXME: cagney/2002-11-28: The only difference between
|
|
flush_cached_frames() and reinit_frame_cache() is that the latter
|
|
explicitly sets the selected frame back to the current frame there
|
|
isn't any real difference (except that one delays the selection of
|
|
a new frame). Code can instead simply rely on get_selected_frame()
|
|
to reinit's the selected frame as needed. As for invalidating the
|
|
cache, there should be two methods one that reverts the thread's
|
|
selected frame back to current frame (for when the inferior
|
|
resumes) and one that does not (for when the user modifies the
|
|
target invalidating the frame cache). */
|
|
extern void flush_cached_frames (void);
|
|
extern void reinit_frame_cache (void);
|
|
|
|
/* On demand, create the selected frame and then return it. If the
|
|
selected frame can not be created, this function throws an error. */
|
|
/* FIXME: cagney/2002-11-28: At present, when there is no selected
|
|
frame, this function always returns the current (inner most) frame.
|
|
It should instead, when a thread has previously had its frame
|
|
selected (but not resumed) and the frame cache invalidated, find
|
|
and then return that thread's previously selected frame. */
|
|
extern struct frame_info *get_selected_frame (void);
|
|
|
|
/* Select a specific frame. NULL, apparently implies re-select the
|
|
inner most frame. */
|
|
extern void select_frame (struct frame_info *);
|
|
|
|
/* Given a FRAME, return the next (more inner, younger) or previous
|
|
(more outer, older) frame. */
|
|
extern struct frame_info *get_prev_frame (struct frame_info *);
|
|
extern struct frame_info *get_next_frame (struct frame_info *);
|
|
|
|
/* Given a frame's ID, relocate the frame. Returns NULL if the frame
|
|
is not found. */
|
|
extern struct frame_info *frame_find_by_id (struct frame_id id);
|
|
|
|
/* Base attributes of a frame: */
|
|
|
|
/* The frame's `resume' address. Where the program will resume in
|
|
this frame.
|
|
|
|
This replaced: frame->pc; */
|
|
extern CORE_ADDR get_frame_pc (struct frame_info *);
|
|
|
|
/* The frame's inner-most bound. AKA the stack-pointer. Confusingly
|
|
known as top-of-stack. */
|
|
|
|
extern CORE_ADDR get_frame_sp (struct frame_info *);
|
|
extern CORE_ADDR frame_sp_unwind (struct frame_info *);
|
|
|
|
|
|
/* Following on from the `resume' address. Return the entry point
|
|
address of the function containing that resume address, or zero if
|
|
that function isn't known. */
|
|
extern CORE_ADDR frame_func_unwind (struct frame_info *fi);
|
|
extern CORE_ADDR get_frame_func (struct frame_info *fi);
|
|
|
|
/* Closely related to the resume address, various symbol table
|
|
attributes that are determined by the PC. Note that for a normal
|
|
frame, the PC refers to the resume address after the return, and
|
|
not the call instruction. In such a case, the address is adjusted
|
|
so that it (approximatly) identifies the call site (and not return
|
|
site).
|
|
|
|
NOTE: cagney/2002-11-28: The frame cache could be used to cache the
|
|
computed value. Working on the assumption that the bottle-neck is
|
|
in the single step code, and that code causes the frame cache to be
|
|
constantly flushed, caching things in a frame is probably of little
|
|
benefit. As they say `show us the numbers'.
|
|
|
|
NOTE: cagney/2002-11-28: Plenty more where this one came from:
|
|
find_frame_block(), find_frame_partial_function(),
|
|
find_frame_symtab(), find_frame_function(). Each will need to be
|
|
carefully considered to determine if the real intent was for it to
|
|
apply to the PC or the adjusted PC. */
|
|
extern void find_frame_sal (struct frame_info *frame,
|
|
struct symtab_and_line *sal);
|
|
|
|
/* Return the frame base (what ever that is) (DEPRECATED).
|
|
|
|
Old code was trying to use this single method for two conflicting
|
|
purposes. Such code needs to be updated to use either of:
|
|
|
|
get_frame_id: A low level frame unique identifier, that consists of
|
|
both a stack and a function address, that can be used to uniquely
|
|
identify a frame. This value is determined by the frame's
|
|
low-level unwinder, the stack part [typically] being the
|
|
top-of-stack of the previous frame, and the function part being the
|
|
function's start address. Since the correct identification of a
|
|
frameless function requires both the a stack and function address,
|
|
the old get_frame_base method was not sufficient.
|
|
|
|
get_frame_base_address: get_frame_locals_address:
|
|
get_frame_args_address: A set of high-level debug-info dependant
|
|
addresses that fall within the frame. These addresses almost
|
|
certainly will not match the stack address part of a frame ID (as
|
|
returned by get_frame_base).
|
|
|
|
This replaced: frame->frame; */
|
|
|
|
extern CORE_ADDR get_frame_base (struct frame_info *);
|
|
|
|
/* Return the per-frame unique identifer. Can be used to relocate a
|
|
frame after a frame cache flush (and other similar operations). If
|
|
FI is NULL, return the null_frame_id. */
|
|
extern struct frame_id get_frame_id (struct frame_info *fi);
|
|
|
|
/* Assuming that a frame is `normal', return its base-address, or 0 if
|
|
the information isn't available. NOTE: This address is really only
|
|
meaningful to the frame's high-level debug info. */
|
|
extern CORE_ADDR get_frame_base_address (struct frame_info *);
|
|
|
|
/* Assuming that a frame is `normal', return the base-address of the
|
|
local variables, or 0 if the information isn't available. NOTE:
|
|
This address is really only meaningful to the frame's high-level
|
|
debug info. Typically, the argument and locals share a single
|
|
base-address. */
|
|
extern CORE_ADDR get_frame_locals_address (struct frame_info *);
|
|
|
|
/* Assuming that a frame is `normal', return the base-address of the
|
|
parameter list, or 0 if that information isn't available. NOTE:
|
|
This address is really only meaningful to the frame's high-level
|
|
debug info. Typically, the argument and locals share a single
|
|
base-address. */
|
|
extern CORE_ADDR get_frame_args_address (struct frame_info *);
|
|
|
|
/* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
|
|
for an invalid frame). */
|
|
extern int frame_relative_level (struct frame_info *fi);
|
|
|
|
/* Return the frame's type. Some are real, some are signal
|
|
trampolines, and some are completly artificial (dummy). */
|
|
|
|
enum frame_type
|
|
{
|
|
/* The frame's type hasn't yet been defined. This is a catch-all
|
|
for legacy code that uses really strange technicques, such as
|
|
deprecated_set_frame_type, to set the frame's type. New code
|
|
should not use this value. */
|
|
UNKNOWN_FRAME,
|
|
/* A true stack frame, created by the target program during normal
|
|
execution. */
|
|
NORMAL_FRAME,
|
|
/* A fake frame, created by GDB when performing an inferior function
|
|
call. */
|
|
DUMMY_FRAME,
|
|
/* In a signal handler, various OSs handle this in various ways.
|
|
The main thing is that the frame may be far from normal. */
|
|
SIGTRAMP_FRAME
|
|
};
|
|
extern enum frame_type get_frame_type (struct frame_info *);
|
|
|
|
/* FIXME: cagney/2002-11-10: Some targets want to directly mark a
|
|
frame as being of a specific type. This shouldn't be necessary.
|
|
PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
|
|
DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
|
|
the real problem here is that get_prev_frame() only sets
|
|
initialized after DEPRECATED_INIT_EXTRA_FRAME_INFO as been called.
|
|
Consequently, some targets found that the frame's type was wrong
|
|
and tried to fix it. The correct fix is to modify get_prev_frame()
|
|
so that it initializes the frame's type before calling any other
|
|
functions. */
|
|
extern void deprecated_set_frame_type (struct frame_info *,
|
|
enum frame_type type);
|
|
|
|
/* Unwind the stack frame so that the value of REGNUM, in the previous
|
|
(up, older) frame is returned. If VALUEP is NULL, don't
|
|
fetch/compute the value. Instead just return the location of the
|
|
value. */
|
|
extern void frame_register_unwind (struct frame_info *frame, int regnum,
|
|
int *optimizedp, enum lval_type *lvalp,
|
|
CORE_ADDR *addrp, int *realnump,
|
|
void *valuep);
|
|
|
|
/* More convenient interface to frame_register_unwind(). */
|
|
/* NOTE: cagney/2002-09-13: Return void as one day these functions may
|
|
be changed to return an indication that the read succeeded. */
|
|
|
|
extern void frame_unwind_register (struct frame_info *frame,
|
|
int regnum, void *buf);
|
|
|
|
extern void frame_unwind_signed_register (struct frame_info *frame,
|
|
int regnum, LONGEST *val);
|
|
|
|
extern void frame_unwind_unsigned_register (struct frame_info *frame,
|
|
int regnum, ULONGEST *val);
|
|
|
|
/* Get the value of the register that belongs to this FRAME. This
|
|
function is a wrapper to the call sequence ``frame_unwind_register
|
|
(get_next_frame (FRAME))''. As per frame_register_unwind(), if
|
|
VALUEP is NULL, the registers value is not fetched/computed. */
|
|
|
|
extern void frame_register (struct frame_info *frame, int regnum,
|
|
int *optimizedp, enum lval_type *lvalp,
|
|
CORE_ADDR *addrp, int *realnump,
|
|
void *valuep);
|
|
|
|
/* More convenient interface to frame_register(). */
|
|
/* NOTE: cagney/2002-09-13: Return void as one day these functions may
|
|
be changed to return an indication that the read succeeded. */
|
|
|
|
extern void frame_read_register (struct frame_info *frame, int regnum,
|
|
void *buf);
|
|
|
|
extern void frame_read_signed_register (struct frame_info *frame,
|
|
int regnum, LONGEST *val);
|
|
|
|
extern void frame_read_unsigned_register (struct frame_info *frame,
|
|
int regnum, ULONGEST *val);
|
|
|
|
/* Map between a frame register number and its name. A frame register
|
|
space is a superset of the cooked register space --- it also
|
|
includes builtin registers. If NAMELEN is negative, use the NAME's
|
|
length when doing the comparison. */
|
|
|
|
extern int frame_map_name_to_regnum (const char *name, int namelen);
|
|
extern const char *frame_map_regnum_to_name (int regnum);
|
|
|
|
/* Unwind the PC. Strictly speaking return the resume address of the
|
|
calling frame. For GDB, `pc' is the resume address and not a
|
|
specific register. */
|
|
|
|
extern CORE_ADDR frame_pc_unwind (struct frame_info *frame);
|
|
|
|
/* Discard the specified frame. Restoring the registers to the state
|
|
of the caller. */
|
|
extern void frame_pop (struct frame_info *frame);
|
|
|
|
/* Return memory from the specified frame. A frame knows its thread /
|
|
LWP and hence can find its way down to a target. The assumption
|
|
here is that the current and previous frame share a common address
|
|
space.
|
|
|
|
If the memory read fails, these methods throw an error.
|
|
|
|
NOTE: cagney/2003-06-03: Should there be unwind versions of these
|
|
methods? That isn't clear. Can code, for instance, assume that
|
|
this and the previous frame's memory or architecture are identical?
|
|
If architecture / memory changes are always separated by special
|
|
adaptor frames this should be ok. */
|
|
|
|
extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
|
|
void *buf, int len);
|
|
extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
|
|
/* Return this frame's architecture. */
|
|
|
|
extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);
|
|
|
|
|
|
/* Values for the source flag to be used in print_frame_info_base(). */
|
|
enum print_what
|
|
{
|
|
/* Print only the source line, like in stepi. */
|
|
SRC_LINE = -1,
|
|
/* Print only the location, i.e. level, address (sometimes)
|
|
function, args, file, line, line num. */
|
|
LOCATION,
|
|
/* Print both of the above. */
|
|
SRC_AND_LOC,
|
|
/* Print location only, but always include the address. */
|
|
LOC_AND_ADDRESS
|
|
};
|
|
|
|
/* Allocate additional space for appendices to a struct frame_info.
|
|
NOTE: Much of GDB's code works on the assumption that the allocated
|
|
saved_regs[] array is the size specified below. If you try to make
|
|
that array smaller, GDB will happily walk off its end. */
|
|
|
|
#ifdef SIZEOF_FRAME_SAVED_REGS
|
|
#error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
|
|
#endif
|
|
#define SIZEOF_FRAME_SAVED_REGS \
|
|
(sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
|
|
|
|
/* Allocate zero initialized memory from the frame cache obstack.
|
|
Appendices to the frame info (such as the unwind cache) should
|
|
allocate memory using this method. */
|
|
|
|
extern void *frame_obstack_zalloc (unsigned long size);
|
|
#define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
|
|
#define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
|
|
|
|
/* If legacy_frame_chain_valid() returns zero it means that the given
|
|
frame is the outermost one and has no caller.
|
|
|
|
This method has been superseeded by the per-architecture
|
|
frame_unwind_pc() (returns 0 to indicate an invalid return address)
|
|
and per-frame this_id() (returns a NULL frame ID to indicate an
|
|
invalid frame). */
|
|
extern int legacy_frame_chain_valid (CORE_ADDR, struct frame_info *);
|
|
|
|
extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
|
|
|
|
extern struct block *get_frame_block (struct frame_info *,
|
|
CORE_ADDR *addr_in_block);
|
|
|
|
/* Return the `struct block' that belongs to the selected thread's
|
|
selected frame. If the inferior has no state, return NULL.
|
|
|
|
NOTE: cagney/2002-11-29:
|
|
|
|
No state? Does the inferior have any execution state (a core file
|
|
does, an executable does not). At present the code tests
|
|
`target_has_stack' but I'm left wondering if it should test
|
|
`target_has_registers' or, even, a merged target_has_state.
|
|
|
|
Should it look at the most recently specified SAL? If the target
|
|
has no state, should this function try to extract a block from the
|
|
most recently selected SAL? That way `list foo' would give it some
|
|
sort of reference point. Then again, perhaphs that would confuse
|
|
things.
|
|
|
|
Calls to this function can be broken down into two categories: Code
|
|
that uses the selected block as an additional, but optional, data
|
|
point; Code that uses the selected block as a prop, when it should
|
|
have the relevant frame/block/pc explicitly passed in.
|
|
|
|
The latter can be eliminated by correctly parameterizing the code,
|
|
the former though is more interesting. Per the "address" command,
|
|
it occures in the CLI code and makes it possible for commands to
|
|
work, even when the inferior has no state. */
|
|
|
|
extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
|
|
|
|
extern struct symbol *get_frame_function (struct frame_info *);
|
|
|
|
extern CORE_ADDR frame_address_in_block (struct frame_info *);
|
|
|
|
extern CORE_ADDR get_pc_function_start (CORE_ADDR);
|
|
|
|
extern int frameless_look_for_prologue (struct frame_info *);
|
|
|
|
extern void print_frame_args (struct symbol *, struct frame_info *,
|
|
int, struct ui_file *);
|
|
|
|
extern struct frame_info *find_relative_frame (struct frame_info *, int *);
|
|
|
|
extern void show_and_print_stack_frame (struct frame_info *fi, int level,
|
|
int source);
|
|
|
|
extern void print_stack_frame (struct frame_info *, int, int);
|
|
|
|
extern void show_stack_frame (struct frame_info *);
|
|
|
|
extern void print_frame_info (struct frame_info *, int, int, int);
|
|
|
|
extern void show_frame_info (struct frame_info *, int, int, int);
|
|
|
|
extern struct frame_info *block_innermost_frame (struct block *);
|
|
|
|
/* NOTE: cagney/2002-09-13: There is no need for this function.
|
|
Instead either of frame_unwind_signed_register() or
|
|
frame_unwind_unsigned_register() can be used. */
|
|
extern CORE_ADDR deprecated_read_register_dummy (CORE_ADDR pc,
|
|
CORE_ADDR fp, int);
|
|
extern void generic_push_dummy_frame (void);
|
|
extern void generic_pop_current_frame (void (*)(struct frame_info *));
|
|
extern void generic_pop_dummy_frame (void);
|
|
|
|
extern int generic_pc_in_call_dummy (CORE_ADDR pc,
|
|
CORE_ADDR sp, CORE_ADDR fp);
|
|
|
|
/* NOTE: cagney/2002-06-26: Targets should no longer use this
|
|
function. Instead, the contents of a dummy frames registers can be
|
|
obtained by applying: frame_register_unwind to the dummy frame; or
|
|
frame_register_unwind() to the next outer frame. */
|
|
|
|
extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
|
|
|
|
void generic_unwind_get_saved_register (char *raw_buffer,
|
|
int *optimizedp,
|
|
CORE_ADDR *addrp,
|
|
struct frame_info *frame,
|
|
int regnum,
|
|
enum lval_type *lvalp);
|
|
|
|
/* The function generic_get_saved_register() has been made obsolete.
|
|
DEPRECATED_GET_SAVED_REGISTER now defaults to the recursive
|
|
equivalent - generic_unwind_get_saved_register() - so there is no
|
|
need to even set DEPRECATED_GET_SAVED_REGISTER. Architectures that
|
|
need to override the register unwind mechanism should modify
|
|
frame->unwind(). */
|
|
extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR *,
|
|
struct frame_info *, int,
|
|
enum lval_type *);
|
|
|
|
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 frame_read_register_p(). This slightly weird (and
|
|
older) variant of frame_read_register() returns zero (indicating
|
|
the register is unavailable) if either: the register isn't cached;
|
|
or the register has been optimized out. Problem is, neither check
|
|
is exactly correct. A register can't be optimized out (it may not
|
|
have been saved as part of a function call); The fact that a
|
|
register isn't in the register cache doesn't mean that the register
|
|
isn't available (it could have been fetched from memory). */
|
|
|
|
extern int frame_register_read (struct frame_info *frame, int regnum,
|
|
void *buf);
|
|
|
|
/* From stack.c. */
|
|
extern void args_info (char *, int);
|
|
|
|
extern void locals_info (char *, int);
|
|
|
|
extern void (*selected_frame_level_changed_hook) (int);
|
|
|
|
extern void return_command (char *, int);
|
|
|
|
|
|
/* NOTE: cagney/2002-11-27:
|
|
|
|
You might think that the below global can simply be replaced by a
|
|
call to either get_selected_frame() or select_frame().
|
|
|
|
Unfortunatly, it isn't that easy.
|
|
|
|
The relevant code needs to be audited to determine if it is
|
|
possible (or pratical) to instead pass the applicable frame in as a
|
|
parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
|
|
the deprecated_selected_frame global, while its replacement,
|
|
PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
|
|
The only real exceptions occure at the edge (in the CLI code) where
|
|
user commands need to pick up the selected frame before proceeding.
|
|
|
|
This is important. GDB is trying to stamp out the hack:
|
|
|
|
saved_frame = deprecated_selected_frame;
|
|
deprecated_selected_frame = ...;
|
|
hack_using_global_selected_frame ();
|
|
deprecated_selected_frame = saved_frame;
|
|
|
|
Take care! */
|
|
|
|
extern struct frame_info *deprecated_selected_frame;
|
|
|
|
|
|
/* Create a frame using the specified BASE and PC. */
|
|
|
|
extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
|
|
|
|
|
|
/* Create/access the frame's `extra info'. The extra info is used by
|
|
older code to store information such as the analyzed prologue. The
|
|
zalloc() should only be called by the INIT_EXTRA_INFO method. */
|
|
|
|
extern struct frame_extra_info *frame_extra_info_zalloc (struct frame_info *fi,
|
|
long size);
|
|
extern struct frame_extra_info *get_frame_extra_info (struct frame_info *fi);
|
|
|
|
/* Create/access the frame's `saved_regs'. The saved regs are used by
|
|
older code to store the address of each register (except for
|
|
SP_REGNUM where the value of the register in the previous frame is
|
|
stored). */
|
|
extern CORE_ADDR *frame_saved_regs_zalloc (struct frame_info *);
|
|
extern CORE_ADDR *get_frame_saved_regs (struct frame_info *);
|
|
|
|
/* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
|
|
"infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
|
|
the initial frame create. This puts things back in sync.
|
|
|
|
This replaced: frame->pc = ....; */
|
|
extern void deprecated_update_frame_pc_hack (struct frame_info *frame,
|
|
CORE_ADDR pc);
|
|
|
|
/* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
|
|
more exact, whas that initial guess at the frame's base as returned
|
|
by deprecated_read_fp() wrong. If it was, fix it. This shouldn't
|
|
be necessary since the code should be getting the frame's base
|
|
correct from the outset.
|
|
|
|
This replaced: frame->frame = ....; */
|
|
extern void deprecated_update_frame_base_hack (struct frame_info *frame,
|
|
CORE_ADDR base);
|
|
|
|
/* FIXME: cagney/2003-01-04: Explicitly set the frame's saved_regs
|
|
and/or extra_info. Target code is allocating a fake frame and than
|
|
initializing that to get around the problem of, when creating the
|
|
inner most frame, there is no where to cache information such as
|
|
the prologue analysis. This is fixed by the new unwind mechanism -
|
|
even the inner most frame has somewhere to store things like the
|
|
prolog analysis (or at least will once the frame overhaul is
|
|
finished). */
|
|
extern void deprecated_set_frame_saved_regs_hack (struct frame_info *frame,
|
|
CORE_ADDR *saved_regs);
|
|
extern void deprecated_set_frame_extra_info_hack (struct frame_info *frame,
|
|
struct frame_extra_info *extra_info);
|
|
|
|
/* FIXME: cagney/2003-01-04: Allocate a frame from the heap (rather
|
|
than the frame obstack). Targets do this as a way of saving the
|
|
prologue analysis from the inner most frame before that frame has
|
|
been created. By always creating a frame, this problem goes away. */
|
|
extern struct frame_info *deprecated_frame_xmalloc (void);
|
|
|
|
/* FIXME: cagney/2003-01-05: Allocate a frame, along with the
|
|
saved_regs and extra_info. Set up cleanups for all three. Same as
|
|
for deprecated_frame_xmalloc, targets are calling this when
|
|
creating a scratch `struct frame_info'. The frame overhaul makes
|
|
this unnecessary since all frame queries are parameterized with a
|
|
common cache parameter and a frame. */
|
|
extern struct frame_info *deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
|
|
long sizeof_extra_info);
|
|
|
|
/* FIXME: cagney/2003-01-07: These are just nasty. Code shouldn't be
|
|
doing this. I suspect it dates back to the days when every field
|
|
of an allocated structure was explicitly initialized. */
|
|
extern void deprecated_set_frame_next_hack (struct frame_info *fi,
|
|
struct frame_info *next);
|
|
extern void deprecated_set_frame_prev_hack (struct frame_info *fi,
|
|
struct frame_info *prev);
|
|
|
|
/* FIXME: cagney/2003-01-07: Instead of the dwarf2cfi having its own
|
|
dedicated `struct frame_info . context' field, the code should use
|
|
the per frame `unwind_cache' that is passed to the
|
|
frame_pc_unwind(), frame_register_unwind() and frame_id_unwind()
|
|
methods.
|
|
|
|
See "dummy-frame.c" for an example of how a cfi-frame object can be
|
|
implemented using this. */
|
|
extern struct context *deprecated_get_frame_context (struct frame_info *fi);
|
|
extern void deprecated_set_frame_context (struct frame_info *fi,
|
|
struct context *context);
|
|
|
|
/* Return non-zero if the architecture is relying on legacy frame
|
|
code. */
|
|
extern int legacy_frame_p (struct gdbarch *gdbarch);
|
|
|
|
#endif /* !defined (FRAME_H) */
|