#include "command.h"
#include "gdbcmd.h"
+/* We keep a cache of stack frames, each of which is a "struct
+ frame_info". The innermost one gets allocated (in
+ wait_for_inferior) each time the inferior stops; current_frame
+ points to it. Additional frames get allocated (in get_prev_frame)
+ as needed, and are chained through the next and prev fields. Any
+ time that the frame cache becomes invalid (most notably when we
+ execute something, but also if we change how we interpret the
+ frames (e.g. "set heuristic-fence-post" in mips-tdep.c, or anything
+ which reads new symbols)), we should call reinit_frame_cache. */
+
+struct frame_info
+{
+ /* Level of this frame. The inner-most (youngest) frame is at level
+ 0. As you move towards the outer-most (oldest) frame, the level
+ increases. This is a cached value. It could just as easily be
+ computed by counting back from the selected frame to the inner
+ most frame. */
+ /* NOTE: cagney/2002-04-05: Perhaphs a level of ``-1'' should be
+ reserved to indicate a bogus frame - one that has been created
+ just to keep GDB happy (GDB always needs a frame). For the
+ moment leave this as speculation. */
+ int level;
+
+ /* The frame's type. */
+ /* FIXME: cagney/2003-04-02: Should instead be returning
+ ->unwind->type. Unfortunatly, legacy code is still explicitly
+ setting the type using the method deprecated_set_frame_type.
+ Eliminate that method and this field can be eliminated. */
+ enum frame_type type;
+
+ /* For each register, address of where it was saved on entry to the
+ frame, or zero if it was not saved on entry to this frame. This
+ includes special registers such as pc and fp saved in special
+ ways in the stack frame. The SP_REGNUM is even more special, the
+ address here is the sp for the previous frame, not the address
+ where the sp was saved. */
+ /* Allocated by frame_saved_regs_zalloc () which is called /
+ initialized by DEPRECATED_FRAME_INIT_SAVED_REGS(). */
+ CORE_ADDR *saved_regs; /*NUM_REGS + NUM_PSEUDO_REGS*/
+
+ /* Anything extra for this structure that may have been defined in
+ the machine dependent files. */
+ /* Allocated by frame_extra_info_zalloc () which is called /
+ initialized by DEPRECATED_INIT_EXTRA_FRAME_INFO */
+ struct frame_extra_info *extra_info;
+
+ /* If dwarf2 unwind frame informations is used, this structure holds
+ all related unwind data. */
+ struct context *context;
+
+ /* The frame's low-level unwinder and corresponding cache. The
+ low-level unwinder is responsible for unwinding register values
+ for the previous frame. The low-level unwind methods are
+ selected based on the presence, or otherwize, of register unwind
+ information such as CFI. */
+ void *prologue_cache;
+ const struct frame_unwind *unwind;
+
+ /* Cached copy of the previous frame's resume address. */
+ struct {
+ int p;
+ CORE_ADDR value;
+ } prev_pc;
+
+ /* Cached copy of the previous frame's function address. */
+ struct
+ {
+ CORE_ADDR addr;
+ int p;
+ } prev_func;
+
+ /* This frame's ID. */
+ struct
+ {
+ int p;
+ struct frame_id value;
+ } this_id;
+
+ /* The frame's high-level base methods, and corresponding cache.
+ The high level base methods are selected based on the frame's
+ debug info. */
+ const struct frame_base *base;
+ void *base_cache;
+
+ /* Pointers to the next (down, inner, younger) and previous (up,
+ outer, older) frame_info's in the frame cache. */
+ struct frame_info *next; /* down, inner, younger */
+ int prev_p;
+ struct frame_info *prev; /* up, outer, older */
+};
+
/* Flag to control debugging. */
static int frame_debug;
static int backtrace_below_main;
+void
+fprint_frame_id (struct ui_file *file, struct frame_id id)
+{
+ fprintf_unfiltered (file, "{stack=0x%s,code=0x%s}",
+ paddr_nz (id.stack_addr),
+ paddr_nz (id.code_addr));
+}
+
+static void
+fprint_frame_type (struct ui_file *file, enum frame_type type)
+{
+ switch (type)
+ {
+ case UNKNOWN_FRAME:
+ fprintf_unfiltered (file, "UNKNOWN_FRAME");
+ return;
+ case NORMAL_FRAME:
+ fprintf_unfiltered (file, "NORMAL_FRAME");
+ return;
+ case DUMMY_FRAME:
+ fprintf_unfiltered (file, "DUMMY_FRAME");
+ return;
+ case SIGTRAMP_FRAME:
+ fprintf_unfiltered (file, "SIGTRAMP_FRAME");
+ return;
+ default:
+ fprintf_unfiltered (file, "<unknown type>");
+ return;
+ };
+}
+
+static void
+fprint_frame (struct ui_file *file, struct frame_info *fi)
+{
+ if (fi == NULL)
+ {
+ fprintf_unfiltered (file, "<NULL frame>");
+ return;
+ }
+ fprintf_unfiltered (file, "{");
+ fprintf_unfiltered (file, "level=%d", fi->level);
+ fprintf_unfiltered (file, ",");
+ fprintf_unfiltered (file, "type=");
+ fprint_frame_type (file, fi->type);
+ fprintf_unfiltered (file, ",");
+ fprintf_unfiltered (file, "unwind=");
+ if (fi->unwind != NULL)
+ gdb_print_host_address (fi->unwind, file);
+ else
+ fprintf_unfiltered (file, "<unknown>");
+ fprintf_unfiltered (file, ",");
+ fprintf_unfiltered (file, "pc=");
+ if (fi->next != NULL && fi->next->prev_pc.p)
+ fprintf_unfiltered (file, "0x%s", paddr_nz (fi->next->prev_pc.value));
+ else
+ fprintf_unfiltered (file, "<unknown>");
+ fprintf_unfiltered (file, ",");
+ fprintf_unfiltered (file, "id=");
+ if (fi->this_id.p)
+ fprint_frame_id (file, fi->this_id.value);
+ else
+ fprintf_unfiltered (file, "<unknown>");
+ fprintf_unfiltered (file, ",");
+ fprintf_unfiltered (file, "func=");
+ if (fi->next != NULL && fi->next->prev_func.p)
+ fprintf_unfiltered (file, "0x%s", paddr_nz (fi->next->prev_func.addr));
+ else
+ fprintf_unfiltered (file, "<unknown>");
+ fprintf_unfiltered (file, "}");
+}
+
/* Return a frame uniq ID that can be used to, later, re-find the
frame. */
{
return null_frame_id;
}
- if (!fi->id_p)
+ if (!fi->this_id.p)
{
gdb_assert (!legacy_frame_p (current_gdbarch));
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ get_frame_id (fi=%d) ",
+ fi->level);
+ /* Find the unwinder. */
+ if (fi->unwind == NULL)
+ {
+ fi->unwind = frame_unwind_find_by_pc (current_gdbarch,
+ get_frame_pc (fi));
+ /* FIXME: cagney/2003-04-02: Rather than storing the frame's
+ type in the frame, the unwinder's type should be returned
+ directly. Unfortunatly, legacy code, called by
+ legacy_get_prev_frame, explicitly set the frames type
+ using the method deprecated_set_frame_type(). */
+ gdb_assert (fi->unwind->type != UNKNOWN_FRAME);
+ fi->type = fi->unwind->type;
+ }
/* Find THIS frame's ID. */
- fi->unwind->this_id (fi->next, &fi->prologue_cache, &fi->id);
- fi->id_p = 1;
- /* FIXME: cagney/2002-12-18: Instead of this hack, should only
- store the frame ID in PREV_FRAME. Unfortunatly, some
- architectures (HP/UX) still reply on EXTRA_FRAME_INFO and,
- hence, still poke at the "struct frame_info" object directly. */
- fi->frame = fi->id.base;
+ fi->unwind->this_id (fi->next, &fi->prologue_cache, &fi->this_id.value);
+ fi->this_id.p = 1;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame_id (gdb_stdlog, fi->this_id.value);
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
}
- return frame_id_build (fi->frame, get_frame_pc (fi));
+ return fi->this_id.value;
}
const struct frame_id null_frame_id; /* All zeros. */
struct frame_id
-frame_id_build (CORE_ADDR base, CORE_ADDR func_or_pc)
+frame_id_build (CORE_ADDR stack_addr, CORE_ADDR code_addr)
{
struct frame_id id;
- id.base = base;
- id.pc = func_or_pc;
+ id.stack_addr = stack_addr;
+ id.code_addr = code_addr;
return id;
}
int
frame_id_p (struct frame_id l)
{
- /* The .func can be NULL but the .base cannot. */
- return (l.base != 0);
+ int p;
+ /* The .code can be NULL but the .stack cannot. */
+ p = (l.stack_addr != 0);
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "{ frame_id_p (l=");
+ fprint_frame_id (gdb_stdlog, l);
+ fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", p);
+ }
+ return p;
}
int
frame_id_eq (struct frame_id l, struct frame_id r)
{
- /* If .base is different, the frames are different. */
- if (l.base != r.base)
- return 0;
- /* Add a test to check that the frame ID's are for the same function
- here. */
- return 1;
+ int eq;
+ if (l.stack_addr == 0 || r.stack_addr == 0)
+ /* Like a NaN, if either ID is invalid, the result is false. */
+ eq = 0;
+ else if (l.stack_addr != r.stack_addr)
+ /* If .stack addresses are different, the frames are different. */
+ eq = 0;
+ else if (l.code_addr == 0 || r.code_addr == 0)
+ /* A zero code addr is a wild card, always succeed. */
+ eq = 1;
+ else if (l.code_addr == r.code_addr)
+ /* The .stack and .code are identical, the ID's are identical. */
+ eq = 1;
+ else
+ /* No luck. */
+ eq = 0;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "{ frame_id_eq (l=");
+ fprint_frame_id (gdb_stdlog, l);
+ fprintf_unfiltered (gdb_stdlog, ",r=");
+ fprint_frame_id (gdb_stdlog, r);
+ fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", eq);
+ }
+ return eq;
}
int
frame_id_inner (struct frame_id l, struct frame_id r)
{
- /* Only return non-zero when strictly inner than. Note that, per
- comment in "frame.h", there is some fuzz here. Frameless
- functions are not strictly inner than (same .base but different
- .func). */
- return INNER_THAN (l.base, r.base);
+ int inner;
+ if (l.stack_addr == 0 || r.stack_addr == 0)
+ /* Like NaN, any operation involving an invalid ID always fails. */
+ inner = 0;
+ else
+ /* Only return non-zero when strictly inner than. Note that, per
+ comment in "frame.h", there is some fuzz here. Frameless
+ functions are not strictly inner than (same .stack but
+ different .code). */
+ inner = INNER_THAN (l.stack_addr, r.stack_addr);
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "{ frame_id_inner (l=");
+ fprint_frame_id (gdb_stdlog, l);
+ fprintf_unfiltered (gdb_stdlog, ",r=");
+ fprint_frame_id (gdb_stdlog, r);
+ fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", inner);
+ }
+ return inner;
}
struct frame_info *
CORE_ADDR
frame_pc_unwind (struct frame_info *this_frame)
{
- if (!this_frame->pc_unwind_cache_p)
+ if (!this_frame->prev_pc.p)
{
CORE_ADDR pc;
if (gdbarch_unwind_pc_p (current_gdbarch))
implementation is no more than:
frame_unwind_register (this_frame, ISA_PC_REGNUM, buf);
- return extract_address (buf, size of ISA_PC_REGNUM);
+ return extract_unsigned_integer (buf, size of ISA_PC_REGNUM);
Note: this method is very heavily dependent on a correct
register-unwind implementation, it pays to fix that
}
else
internal_error (__FILE__, __LINE__, "No gdbarch_unwind_pc method");
- this_frame->pc_unwind_cache = pc;
- this_frame->pc_unwind_cache_p = 1;
+ this_frame->prev_pc.value = pc;
+ this_frame->prev_pc.p = 1;
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "{ frame_pc_unwind (this_frame=%d) -> 0x%s }\n",
+ this_frame->level,
+ paddr_nz (this_frame->prev_pc.value));
}
- return this_frame->pc_unwind_cache;
+ return this_frame->prev_pc.value;
+}
+
+CORE_ADDR
+frame_func_unwind (struct frame_info *fi)
+{
+ if (!fi->prev_func.p)
+ {
+ fi->prev_func.p = 1;
+ fi->prev_func.addr = get_pc_function_start (frame_pc_unwind (fi));
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "{ frame_func_unwind (fi=%d) -> 0x%s }\n",
+ fi->level, paddr_nz (fi->prev_func.addr));
+ }
+ return fi->prev_func.addr;
+}
+
+CORE_ADDR
+get_frame_func (struct frame_info *fi)
+{
+ return frame_func_unwind (fi->next);
}
static int
{
struct frame_unwind_cache *cache;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "{ frame_register_unwind (frame=%d,regnum=\"%s\",...) ",
+ frame->level, frame_map_regnum_to_name (regnum));
+ }
+
/* Require all but BUFFERP to be valid. A NULL BUFFERP indicates
that the value proper does not need to be fetched. */
gdb_assert (optimizedp != NULL);
detected the problem before calling here. */
gdb_assert (frame != NULL);
+ /* Find the unwinder. */
+ if (frame->unwind == NULL)
+ {
+ frame->unwind = frame_unwind_find_by_pc (current_gdbarch,
+ get_frame_pc (frame));
+ /* FIXME: cagney/2003-04-02: Rather than storing the frame's
+ type in the frame, the unwinder's type should be returned
+ directly. Unfortunatly, legacy code, called by
+ legacy_get_prev_frame, explicitly set the frames type using
+ the method deprecated_set_frame_type(). */
+ gdb_assert (frame->unwind->type != UNKNOWN_FRAME);
+ frame->type = frame->unwind->type;
+ }
+
/* Ask this frame to unwind its register. See comment in
"frame-unwind.h" for why NEXT frame and this unwind cace are
passed in. */
frame->unwind->prev_register (frame->next, &frame->prologue_cache, regnum,
optimizedp, lvalp, addrp, realnump, bufferp);
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "->");
+ fprintf_unfiltered (gdb_stdlog, " *optimizedp=%d", (*optimizedp));
+ fprintf_unfiltered (gdb_stdlog, " *lvalp=%d", (int) (*lvalp));
+ fprintf_unfiltered (gdb_stdlog, " *addrp=0x%s", paddr_nz ((*addrp)));
+ fprintf_unfiltered (gdb_stdlog, " *bufferp=");
+ if (bufferp == NULL)
+ fprintf_unfiltered (gdb_stdlog, "<NULL>");
+ else
+ {
+ int i;
+ const char *buf = bufferp;
+ fprintf_unfiltered (gdb_stdlog, "[");
+ for (i = 0; i < register_size (current_gdbarch, regnum); i++)
+ fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
+ fprintf_unfiltered (gdb_stdlog, "]");
+ }
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
}
void
frame_unwind_signed_register (struct frame_info *frame, int regnum,
LONGEST *val)
{
- void *buf = alloca (MAX_REGISTER_RAW_SIZE);
+ char buf[MAX_REGISTER_SIZE];
frame_unwind_register (frame, regnum, buf);
(*val) = extract_signed_integer (buf, REGISTER_VIRTUAL_SIZE (regnum));
}
frame_unwind_unsigned_register (struct frame_info *frame, int regnum,
ULONGEST *val)
{
- void *buf = alloca (MAX_REGISTER_RAW_SIZE);
+ char buf[MAX_REGISTER_SIZE];
frame_unwind_register (frame, regnum, buf);
(*val) = extract_unsigned_integer (buf, REGISTER_VIRTUAL_SIZE (regnum));
}
}
void
-generic_unwind_get_saved_register (char *raw_buffer,
- int *optimizedp,
- CORE_ADDR *addrp,
- struct frame_info *frame,
- int regnum,
- enum lval_type *lvalp)
+put_frame_register (struct frame_info *frame, int regnum, const void *buf)
+{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ int realnum;
+ int optim;
+ enum lval_type lval;
+ CORE_ADDR addr;
+ frame_register (frame, regnum, &optim, &lval, &addr, &realnum, NULL);
+ if (optim)
+ error ("Attempt to assign to a value that was optimized out.");
+ switch (lval)
+ {
+ case lval_memory:
+ {
+ /* FIXME: write_memory doesn't yet take constant buffers.
+ Arrrg! */
+ char tmp[MAX_REGISTER_SIZE];
+ memcpy (tmp, buf, register_size (gdbarch, regnum));
+ write_memory (addr, tmp, register_size (gdbarch, regnum));
+ break;
+ }
+ case lval_register:
+ regcache_cooked_write (current_regcache, realnum, buf);
+ break;
+ default:
+ error ("Attempt to assign to an unmodifiable value.");
+ }
+}
+
+void
+deprecated_unwind_get_saved_register (char *raw_buffer,
+ int *optimizedp,
+ CORE_ADDR *addrp,
+ struct frame_info *frame,
+ int regnum,
+ enum lval_type *lvalp)
{
int optimizedx;
CORE_ADDR addrx;
/* Create a sentinel frame. */
-struct frame_info *
+static struct frame_info *
create_sentinel_frame (struct regcache *regcache)
{
struct frame_info *frame = FRAME_OBSTACK_ZALLOC (struct frame_info);
/* Link this frame back to itself. The frame is self referential
(the unwound PC is the same as the pc), so make it so. */
frame->next = frame;
- /* Always unwind the PC as part of creating this frame. This
- ensures that the frame's PC points at something valid. */
- /* FIXME: cagney/2003-01-10: Problem here. Unwinding a sentinel
- frame's PC may require information such as the frame's thread's
- stop reason. Is it possible to get to that? */
- /* FIXME: cagney/2003-04-04: Once ->pc is eliminated, this
- assignment can go away. */
- frame->pc = frame_pc_unwind (frame);
/* Make the sentinel frame's ID valid, but invalid. That way all
comparisons with it should fail. */
- frame->id_p = 1;
- frame->id = null_frame_id;
+ frame->this_id.p = 1;
+ frame->this_id.value = null_frame_id;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "{ create_sentinel_frame (...) -> ");
+ fprint_frame (gdb_stdlog, frame);
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
return frame;
}
struct frame_info *frame = next_frame->prev;
gdb_assert (frame != NULL);
- /* Only (older) architectures that implement the
- DEPRECATED_FRAME_INIT_SAVED_REGS method should be using this
- function. */
- gdb_assert (DEPRECATED_FRAME_INIT_SAVED_REGS_P ());
-
- /* Load the saved_regs register cache. */
if (get_frame_saved_regs (frame) == NULL)
- DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
+ {
+ /* If nothing's initialized the saved regs, do it now. */
+ gdb_assert (DEPRECATED_FRAME_INIT_SAVED_REGS_P ());
+ DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
+ gdb_assert (get_frame_saved_regs (frame) != NULL);
+ }
if (get_frame_saved_regs (frame) != NULL
&& get_frame_saved_regs (frame)[regnum] != 0)
*addrp = 0;
*realnump = -1;
if (bufferp != NULL)
- store_address (bufferp, REGISTER_RAW_SIZE (regnum),
- get_frame_saved_regs (frame)[regnum]);
+ /* NOTE: cagney/2003-05-09: In-lined store_address with
+ it's body - store_unsigned_integer. */
+ store_unsigned_integer (bufferp, REGISTER_RAW_SIZE (regnum),
+ get_frame_saved_regs (frame)[regnum]);
}
else
{
void **this_prologue_cache,
struct frame_id *id)
{
- int fromleaf;
- CORE_ADDR base;
- CORE_ADDR pc;
-
- if (frame_relative_level (next_frame) < 0)
- {
- /* FIXME: cagney/2003-03-14: We've got the extra special case of
- 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. */
- (*id) = frame_id_build (read_fp (), read_pc ());
- return;
- }
-
- /* Start out by assuming it's NULL. */
- (*id) = null_frame_id;
-
- if (frame_relative_level (next_frame) <= 0)
- /* FIXME: 2002-11-09: Frameless functions can occure anywhere in
- the frame chain, not just the inner most frame! The generic,
- per-architecture, frame code should handle this and the below
- should simply be removed. */
- fromleaf = FRAMELESS_FUNCTION_INVOCATION (next_frame);
- else
- fromleaf = 0;
-
- if (fromleaf)
- /* A frameless inner-most frame. The `FP' (which isn't an
- architecture frame-pointer register!) of the caller is the same
- as the callee. */
- /* FIXME: 2002-11-09: There isn't any reason to special case this
- edge condition. Instead the per-architecture code should hande
- it locally. */
- base = get_frame_base (next_frame);
- else
- {
- /* Two macros defined in tm.h specify the machine-dependent
- actions to be performed here.
-
- First, get the frame's chain-pointer.
-
- If that is zero, the frame is the outermost frame or a leaf
- called by the outermost frame. This means that if start
- calls main without a frame, we'll return 0 (which is fine
- anyway).
-
- Nope; there's a problem. This also returns when the current
- routine is a leaf of main. This is unacceptable. We move
- this to after the ffi test; I'd rather have backtraces from
- start go curfluy than have an abort called from main not show
- main. */
- gdb_assert (DEPRECATED_FRAME_CHAIN_P ());
- base = DEPRECATED_FRAME_CHAIN (next_frame);
-
- if (!frame_chain_valid (base, next_frame))
- return;
- }
- if (base == 0)
- return;
-
- /* FIXME: cagney/2002-06-08: This should probably return the frame's
- function and not the PC (a.k.a. resume address). */
- pc = frame_pc_unwind (next_frame);
- (*id) = frame_id_build (base, pc);
+ /* legacy_get_prev_frame() always sets ->this_id.p, hence this is
+ never needed. */
+ internal_error (__FILE__, __LINE__, "legacy_saved_regs_this_id() called");
}
const struct frame_unwind legacy_saved_regs_unwinder = {
+ /* Not really. It gets overridden by legacy_get_prev_frame. */
+ UNKNOWN_FRAME,
legacy_saved_regs_this_id,
legacy_saved_regs_prev_register
};
if (!target_has_registers)
error ("No registers.");
- gdb_assert (DEPRECATED_FRAME_INIT_SAVED_REGS_P ());
-
/* Normal systems don't optimize out things with register numbers. */
if (optimized != NULL)
*optimized = 0;
fly, constructs either a raw or pseudo register
from the raw register cache. */
regcache_raw_read
- (generic_find_dummy_frame (get_frame_pc (frame),
- get_frame_base (frame)),
+ (deprecated_find_dummy_frame_regcache (get_frame_pc (frame),
+ get_frame_base (frame)),
regnum, raw_buffer);
return;
}
if (regnum == SP_REGNUM)
{
if (raw_buffer) /* SP register treated specially */
- store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
- get_frame_saved_regs (frame)[regnum]);
+ /* NOTE: cagney/2003-05-09: In-line store_address
+ with it's body - store_unsigned_integer. */
+ store_unsigned_integer (raw_buffer,
+ REGISTER_RAW_SIZE (regnum),
+ get_frame_saved_regs (frame)[regnum]);
}
else
{
{
struct frame_info *fi;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "{ create_new_frame (addr=0x%s, pc=0x%s) ",
+ paddr_nz (addr), paddr_nz (pc));
+ }
+
fi = frame_obstack_zalloc (sizeof (struct frame_info));
fi->next = create_sentinel_frame (current_regcache);
- fi->type = frame_type_from_pc (pc);
+
+ /* Select/initialize both the unwind function and the frame's type
+ based on the PC. */
+ fi->unwind = frame_unwind_find_by_pc (current_gdbarch, pc);
+ if (fi->unwind->type != UNKNOWN_FRAME)
+ fi->type = fi->unwind->type;
+ else
+ fi->type = frame_type_from_pc (pc);
+
+ fi->this_id.p = 1;
deprecated_update_frame_base_hack (fi, addr);
deprecated_update_frame_pc_hack (fi, pc);
if (DEPRECATED_INIT_EXTRA_FRAME_INFO_P ())
DEPRECATED_INIT_EXTRA_FRAME_INFO (0, fi);
- /* Select/initialize an unwind function. */
- fi->unwind = frame_unwind_find_by_pc (current_gdbarch, get_frame_pc (fi));
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, fi);
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
return fi;
}
return NULL;
}
+struct frame_info *
+deprecated_get_next_frame_hack (struct frame_info *this_frame)
+{
+ return this_frame->next;
+}
+
/* Flush the entire frame cache. */
void
current_frame = NULL; /* Invalidate cache */
select_frame (NULL);
annotate_frames_invalid ();
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ flush_cached_frames () }\n");
}
/* Flush the frame cache, and start a new one if necessary. */
struct frame_info *prev;
int fromleaf;
- /* Allocate the new frame but do not wire it in to the frame chain.
- Some (bad) code in INIT_FRAME_EXTRA_INFO tries to look along
- frame->next to pull some fancy tricks (of course such code is, by
- definition, recursive). Try to prevent it.
+ /* Don't frame_debug print legacy_get_prev_frame() here, just
+ confuses the output. */
+
+ /* Allocate the new frame.
There is no reason to worry about memory leaks, should the
remainder of the function fail. The allocated memory will be
prev = FRAME_OBSTACK_ZALLOC (struct frame_info);
prev->level = this_frame->level + 1;
+ /* Do not completly wire it in to the frame chain. Some (bad) code
+ in INIT_FRAME_EXTRA_INFO tries to look along frame->prev to pull
+ some fancy tricks (of course such code is, by definition,
+ recursive).
+
+ On the other hand, methods, such as get_frame_pc() and
+ get_frame_base() rely on being able to walk along the frame
+ chain. Make certain that at least they work by providing that
+ link. Of course things manipulating prev can't go back. */
+ prev->next = this_frame;
+
/* NOTE: cagney/2002-11-18: Should have been correctly setting the
frame's type here, before anything else, and not last, at the
bottom of this function. The various
Unfortunatly those same work-arounds rely on the type defaulting
to NORMAL_FRAME. Ulgh! The new frame code does not have this
problem. */
- prev->type = NORMAL_FRAME;
+ prev->type = UNKNOWN_FRAME;
/* A legacy frame's ID is always computed here. Mark it as valid. */
- prev->id_p = 1;
+ prev->this_id.p = 1;
/* Handle sentinel frame unwind as a special case. */
if (this_frame->level < 0)
/* The allocated PREV_FRAME will be reclaimed when the frame
obstack is next purged. */
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - unwound PC zero\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog,
+ " // unwound legacy PC zero }\n");
+ }
return NULL;
}
- prev->type = frame_type_from_pc (get_frame_pc (prev));
- /* Set the unwind functions based on that identified PC. */
+ /* Set the unwind functions based on that identified PC. Ditto
+ for the "type" but strongly prefer the unwinder's frame type. */
prev->unwind = frame_unwind_find_by_pc (current_gdbarch,
get_frame_pc (prev));
+ if (prev->unwind->type == UNKNOWN_FRAME)
+ prev->type = frame_type_from_pc (get_frame_pc (prev));
+ else
+ prev->type = prev->unwind->type;
/* Find the prev's frame's ID. */
if (prev->type == DUMMY_FRAME
or some random address on the stack. Trying to use that
PC to apply standard frame ID unwind techniques is just
asking for trouble. */
- /* 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. */
- prev->id = gdbarch_unwind_dummy_id (current_gdbarch, this_frame);
+ prev->this_id.value = gdbarch_unwind_dummy_id (current_gdbarch,
+ this_frame);
}
else
{
using the same sequence as is found a traditional
unwinder. Once all architectures supply the
unwind_dummy_id method, this code can go away. */
- prev->id = frame_id_build (read_fp (), read_pc ());
+ prev->this_id.value = frame_id_build (deprecated_read_fp (),
+ read_pc ());
}
/* Check that the unwound ID is valid. */
- if (!frame_id_p (prev->id))
+ if (!frame_id_p (prev->this_id.value))
{
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost legacy sentinel frame - unwound frame ID invalid\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog,
+ " // unwound legacy ID invalid }\n");
+ }
return NULL;
}
after the switch to storing the frame ID, instead of the
frame base, in the frame object. */
- /* FIXME: cagney/2002-12-18: Instead of this hack, should only
- store the frame ID in PREV_FRAME. Unfortunatly, some
- architectures (HP/UX) still reply on EXTRA_FRAME_INFO and,
- hence, still poke at the "struct frame_info" object directly. */
- /* FIXME: cagney/2003-04-04: Once ->frame is eliminated, this
- assignment can go. */
- prev->frame = prev->id.base;
-
/* Link it in. */
this_frame->prev = prev;
- prev->next = this_frame;
/* FIXME: cagney/2002-01-19: This call will go away. Instead of
initializing extra info, all frames will use the frame_cache
{
DEPRECATED_INIT_EXTRA_FRAME_INFO (0, prev);
}
+
+ if (prev->type == NORMAL_FRAME)
+ prev->this_id.value.code_addr
+ = get_pc_function_start (prev->this_id.value.code_addr);
+
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, prev);
+ fprintf_unfiltered (gdb_stdlog, " } // legacy innermost frame\n");
+ }
return prev;
}
/* FIXME: 2002-11-09: There isn't any reason to special case this
edge condition. Instead the per-architecture code should hande
it locally. */
+ /* FIXME: cagney/2003-06-16: This returns the inner most stack
+ address for the previous frame, that, however, is wrong. It
+ should be the inner most stack address for the previous to
+ previous frame. This is because it is the previous to previous
+ frame's innermost stack address that is constant through out
+ the lifetime of the previous frame (trust me :-). */
address = get_frame_base (this_frame);
else
{
this to after the ffi test; I'd rather have backtraces from
start go curfluy than have an abort called from main not show
main. */
- gdb_assert (DEPRECATED_FRAME_CHAIN_P ());
- address = DEPRECATED_FRAME_CHAIN (this_frame);
+ if (DEPRECATED_FRAME_CHAIN_P ())
+ address = DEPRECATED_FRAME_CHAIN (this_frame);
+ else
+ {
+ /* Someone is part way through coverting an old architecture
+ to the new frame code. Implement FRAME_CHAIN the way the
+ new frame will. */
+ /* Find PREV frame's unwinder. */
+ prev->unwind = frame_unwind_find_by_pc (current_gdbarch,
+ frame_pc_unwind (this_frame));
+ /* FIXME: cagney/2003-04-02: Rather than storing the frame's
+ type in the frame, the unwinder's type should be returned
+ directly. Unfortunatly, legacy code, called by
+ legacy_get_prev_frame, explicitly set the frames type
+ using the method deprecated_set_frame_type(). */
+ prev->type = prev->unwind->type;
+ /* Find PREV frame's ID. */
+ prev->unwind->this_id (this_frame,
+ &prev->prologue_cache,
+ &prev->this_id.value);
+ prev->this_id.p = 1;
+ address = prev->this_id.value.stack_addr;
+ }
- if (!frame_chain_valid (address, this_frame))
- return 0;
+ if (!legacy_frame_chain_valid (address, this_frame))
+ {
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog,
+ " // legacy frame chain invalid }\n");
+ }
+ return NULL;
+ }
}
if (address == 0)
- return 0;
+ {
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog,
+ " // legacy frame chain NULL }\n");
+ }
+ return NULL;
+ }
/* Link in the already allocated prev frame. */
this_frame->prev = prev;
- prev->next = this_frame;
deprecated_update_frame_base_hack (prev, address);
/* This change should not be needed, FIXME! We should determine
DEPRECATED_INIT_EXTRA_FRAME_INFO, one possible scheme:
SETUP_INNERMOST_FRAME(): Default version is just create_new_frame
- (read_fp ()), read_pc ()). Machines with extra frame info would
- do that (or the local equivalent) and then set the extra fields.
+ (deprecated_read_fp ()), read_pc ()). Machines with extra frame
+ info would do that (or the local equivalent) and then set the
+ extra fields.
SETUP_ARBITRARY_FRAME(argc, argv): Only change here is that
create_new_frame would no longer init extra frame info;
{
this_frame->prev = NULL;
obstack_free (&frame_cache_obstack, prev);
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog,
+ " // legacy this.id == prev.id }\n");
+ }
return NULL;
}
/* Initialize the code used to unwind the frame PREV based on the PC
(and probably other architectural information). The PC lets you
check things like the debug info at that point (dwarf2cfi?) and
- use that to decide how the frame should be unwound. */
- prev->unwind = frame_unwind_find_by_pc (current_gdbarch,
- get_frame_pc (prev));
+ use that to decide how the frame should be unwound.
+
+ If there isn't a FRAME_CHAIN, the code above will have already
+ done this. */
+ if (prev->unwind == NULL)
+ prev->unwind = frame_unwind_find_by_pc (current_gdbarch,
+ get_frame_pc (prev));
+
+ /* If the unwinder provides a frame type, use it. Otherwize
+ continue on to that heuristic mess. */
+ if (prev->unwind->type != UNKNOWN_FRAME)
+ {
+ prev->type = prev->unwind->type;
+ if (prev->type == NORMAL_FRAME)
+ /* FIXME: cagney/2003-06-16: would get_frame_pc() be better? */
+ prev->this_id.value.code_addr
+ = get_pc_function_start (prev->this_id.value.code_addr);
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, prev);
+ fprintf_unfiltered (gdb_stdlog, " } // legacy with unwound type\n");
+ }
+ return prev;
+ }
/* NOTE: cagney/2002-11-18: The code segments, found in
create_new_frame and get_prev_frame(), that initializes the
go away. */
}
+ if (prev->type == NORMAL_FRAME)
+ prev->this_id.value.code_addr
+ = get_pc_function_start (prev->this_id.value.code_addr);
+
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, prev);
+ fprintf_unfiltered (gdb_stdlog, " } // legacy with confused type\n");
+ }
+
return prev;
}
{
struct frame_info *prev_frame;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "{ get_prev_frame (this_frame=");
+ if (this_frame != NULL)
+ fprintf_unfiltered (gdb_stdlog, "%d", this_frame->level);
+ else
+ fprintf_unfiltered (gdb_stdlog, "<NULL>");
+ fprintf_unfiltered (gdb_stdlog, ") ");
+ }
+
/* Return the inner-most frame, when the caller passes in NULL. */
/* NOTE: cagney/2002-11-09: Not sure how this would happen. The
caller should have previously obtained a valid frame using
allow unwinds past main(), that just happens. */
{
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - inside main func.\n");
+ fprintf_unfiltered (gdb_stdlog, "-> NULL // inside main func }\n");
return NULL;
}
/* Only try to do the unwind once. */
if (this_frame->prev_p)
- return this_frame->prev;
+ {
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, this_frame->prev);
+ fprintf_unfiltered (gdb_stdlog, " // cached \n");
+ }
+ return this_frame->prev;
+ }
this_frame->prev_p = 1;
#if 0
&& inside_entry_file (get_frame_pc (this_frame)))
{
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - inside entry file\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog, " // inside entry file }\n");
+ }
return NULL;
}
#endif
&& inside_entry_func (get_frame_pc (this_frame)))
{
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - inside entry func\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog, "// inside entry func }\n");
+ }
return NULL;
}
if (legacy_frame_p (current_gdbarch))
{
prev_frame = legacy_get_prev_frame (this_frame);
- if (frame_debug && prev_frame == NULL)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - legacy_get_prev_frame NULL.\n");
return prev_frame;
}
if (this_frame->level >= 0 && !frame_id_p (get_frame_id (this_frame)))
{
if (frame_debug)
- fprintf_filtered (gdb_stdlog,
- "Outermost frame - this ID is NULL\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog, " // this ID is NULL }\n");
+ }
return NULL;
}
because (well ignoring the PPC) a dummy frame can be located
using THIS_FRAME's frame ID. */
- /* FIXME: cagney/2003-04-04: Once ->pc is eliminated, this
- assignment can go away. */
- prev_frame->pc = frame_pc_unwind (this_frame);
- if (prev_frame->pc == 0)
+ if (frame_pc_unwind (this_frame) == 0)
{
/* The allocated PREV_FRAME will be reclaimed when the frame
obstack is next purged. */
if (frame_debug)
- fprintf_unfiltered (gdb_stdlog,
- "Outermost frame - unwound PC zero\n");
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, NULL);
+ fprintf_unfiltered (gdb_stdlog, " // unwound PC zero }\n");
+ }
return NULL;
}
- prev_frame->type = frame_type_from_pc (prev_frame->pc);
- /* Set the unwind functions based on that identified PC. */
- prev_frame->unwind = frame_unwind_find_by_pc (current_gdbarch,
- prev_frame->pc);
+ /* Don't yet compute ->unwind (and hence ->type). It is computed
+ on-demand in get_frame_type, frame_register_unwind, and
+ get_frame_id. */
- /* The prev's frame's ID is computed by demand in get_frame_id(). */
+ /* Don't yet compute the frame's ID. It is computed on-demand by
+ get_frame_id(). */
/* The unwound frame ID is validate at the start of this function,
as part of the logic to decide if that frame should be further
Doing this makes it possible for the user to examine a frame that
has an invalid frame ID.
- The very old VAX frame_args_address_correct() method noted: [...]
- For the sake of argument, suppose that the stack is somewhat
- trashed (which is one reason that "info frame" exists). So,
- return 0 (indicating we don't know the address of the arglist) if
- we don't know what frame this frame calls. */
+ Some very old VAX code noted: [...] For the sake of argument,
+ suppose that the stack is somewhat trashed (which is one reason
+ that "info frame" exists). So, return 0 (indicating we don't
+ know the address of the arglist) if we don't know what frame this
+ frame calls. */
/* Link it in. */
this_frame->prev = prev_frame;
prev_frame->next = this_frame;
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame (gdb_stdlog, prev_frame);
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
+
return prev_frame;
}
CORE_ADDR
get_frame_pc (struct frame_info *frame)
{
- return frame->pc;
+ gdb_assert (frame->next != NULL);
+ return frame_pc_unwind (frame->next);
}
static int
CORE_ADDR
get_frame_base (struct frame_info *fi)
{
- if (!fi->id_p)
- {
- /* HACK: Force the ID code to (indirectly) initialize the
- ->frame pointer. */
- get_frame_id (fi);
- }
- return fi->frame;
+ return get_frame_id (fi).stack_addr;
}
/* High-level offsets into the frame. Used by the debug info. */
CORE_ADDR
get_frame_base_address (struct frame_info *fi)
{
- if (fi->type != NORMAL_FRAME)
+ if (get_frame_type (fi) != NORMAL_FRAME)
return 0;
if (fi->base == NULL)
fi->base = frame_base_find_by_pc (current_gdbarch, get_frame_pc (fi));
get_frame_locals_address (struct frame_info *fi)
{
void **cache;
- if (fi->type != NORMAL_FRAME)
+ if (get_frame_type (fi) != NORMAL_FRAME)
return 0;
/* If there isn't a frame address method, find it. */
if (fi->base == NULL)
get_frame_args_address (struct frame_info *fi)
{
void **cache;
- if (fi->type != NORMAL_FRAME)
+ if (get_frame_type (fi) != NORMAL_FRAME)
return 0;
/* If there isn't a frame address method, find it. */
if (fi->base == NULL)
if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
&& deprecated_frame_in_dummy (frame))
return DUMMY_FRAME;
- return frame->type;
+
+ /* Some legacy code, e.g, mips_init_extra_frame_info() wants
+ to determine the frame's type prior to it being completely
+ initialized. Don't attempt to lazily initialize ->unwind for
+ legacy code. It will be initialized in legacy_get_prev_frame(). */
+ if (frame->unwind == NULL && !legacy_frame_p (current_gdbarch))
+ {
+ /* Initialize the frame's unwinder because it is that which
+ provides the frame's type. */
+ frame->unwind = frame_unwind_find_by_pc (current_gdbarch,
+ get_frame_pc (frame));
+ /* FIXME: cagney/2003-04-02: Rather than storing the frame's
+ type in the frame, the unwinder's type should be returned
+ directly. Unfortunatly, legacy code, called by
+ legacy_get_prev_frame, explicitly set the frames type using
+ the method deprecated_set_frame_type(). */
+ gdb_assert (frame->unwind->type != UNKNOWN_FRAME);
+ frame->type = frame->unwind->type;
+ }
+ if (frame->type == UNKNOWN_FRAME)
+ return NORMAL_FRAME;
+ else
+ return frame->type;
}
void
frame->type = type;
}
-#ifdef FRAME_FIND_SAVED_REGS
-/* XXX - deprecated. This is a compatibility function for targets
- that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */
-/* Find the addresses in which registers are saved in FRAME. */
-
-void
-deprecated_get_frame_saved_regs (struct frame_info *frame,
- struct frame_saved_regs *saved_regs_addr)
-{
- if (frame->saved_regs == NULL)
- {
- frame->saved_regs = (CORE_ADDR *)
- frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
- }
- if (saved_regs_addr == NULL)
- {
- struct frame_saved_regs saved_regs;
- FRAME_FIND_SAVED_REGS (frame, saved_regs);
- memcpy (frame->saved_regs, &saved_regs, SIZEOF_FRAME_SAVED_REGS);
- }
- else
- {
- FRAME_FIND_SAVED_REGS (frame, *saved_regs_addr);
- memcpy (frame->saved_regs, saved_regs_addr, SIZEOF_FRAME_SAVED_REGS);
- }
-}
-#endif
-
struct frame_extra_info *
get_frame_extra_info (struct frame_info *fi)
{
void
deprecated_update_frame_pc_hack (struct frame_info *frame, CORE_ADDR pc)
{
- /* See comment in "frame.h". */
- frame->pc = pc;
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "{ deprecated_update_frame_pc_hack (frame=%d,pc=0x%s) }\n",
+ frame->level, paddr_nz (pc));
/* NOTE: cagney/2003-03-11: Some architectures (e.g., Arm) are
maintaining a locally allocated frame object. Since such frame's
are not in the frame chain, it isn't possible to assume that the
/* While we're at it, update this frame's cached PC value, found
in the next frame. Oh for the day when "struct frame_info"
is opaque and this hack on hack can just go away. */
- frame->next->pc_unwind_cache = pc;
- frame->next->pc_unwind_cache_p = 1;
+ frame->next->prev_pc.value = pc;
+ frame->next->prev_pc.p = 1;
}
}
void
deprecated_update_frame_base_hack (struct frame_info *frame, CORE_ADDR base)
{
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "{ deprecated_update_frame_base_hack (frame=%d,base=0x%s) }\n",
+ frame->level, paddr_nz (base));
/* See comment in "frame.h". */
- frame->frame = base;
+ frame->this_id.value.stack_addr = base;
}
void
struct frame_info *
deprecated_frame_xmalloc (void)
{
- struct frame_info *frame = XMALLOC (struct frame_info);
- memset (frame, 0, sizeof (struct frame_info));
+ struct frame_info *frame = FRAME_OBSTACK_ZALLOC (struct frame_info);
+ frame->this_id.p = 1;
return frame;
}
return frame;
}
+/* Memory access methods. */
+
+void
+get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr, void *buf,
+ int len)
+{
+ read_memory (addr, buf, len);
+}
+
+LONGEST
+get_frame_memory_signed (struct frame_info *this_frame, CORE_ADDR addr,
+ int len)
+{
+ return read_memory_integer (addr, len);
+}
+
+ULONGEST
+get_frame_memory_unsigned (struct frame_info *this_frame, CORE_ADDR addr,
+ int len)
+{
+ return read_memory_unsigned_integer (addr, len);
+}
+
+/* Architecture method. */
+
+struct gdbarch *
+get_frame_arch (struct frame_info *this_frame)
+{
+ return current_gdbarch;
+}
+
+/* Stack pointer methods. */
+
+CORE_ADDR
+get_frame_sp (struct frame_info *this_frame)
+{
+ return frame_sp_unwind (this_frame->next);
+}
+
+CORE_ADDR
+frame_sp_unwind (struct frame_info *next_frame)
+{
+ /* Normality, an architecture that provides a way of obtaining any
+ frame inner-most address. */
+ if (gdbarch_unwind_sp_p (current_gdbarch))
+ return gdbarch_unwind_sp (current_gdbarch, next_frame);
+ /* Things are looking grim. If it's the inner-most frame and there
+ is a TARGET_READ_SP then that can be used. */
+ if (next_frame->level < 0 && TARGET_READ_SP_P ())
+ return TARGET_READ_SP ();
+ /* Now things are really are grim. Hope that the value returned by
+ the SP_REGNUM register is meaningful. */
+ if (SP_REGNUM >= 0)
+ {
+ ULONGEST sp;
+ frame_unwind_unsigned_register (next_frame, SP_REGNUM, &sp);
+ return sp;
+ }
+ internal_error (__FILE__, __LINE__, "Missing unwind SP method");
+}
+
+
int
legacy_frame_p (struct gdbarch *current_gdbarch)
{
|| DEPRECATED_INIT_FRAME_PC_FIRST_P ()
|| DEPRECATED_INIT_EXTRA_FRAME_INFO_P ()
|| DEPRECATED_FRAME_CHAIN_P ()
- || !gdbarch_unwind_dummy_id_p (current_gdbarch)
- || !SAVE_DUMMY_FRAME_TOS_P ());
+ || !gdbarch_unwind_dummy_id_p (current_gdbarch));
}
+extern initialize_file_ftype _initialize_frame; /* -Wmissing-prototypes */
+
void
_initialize_frame (void)
{
projects / deliverable / binutils-gdb.git / blobdiff