#include "defs.h"
#include "symtab.h"
#include "bfd.h"
-#include "symfile.h"
#include "objfiles.h"
#include "frame.h"
#include "gdbcore.h"
void _initialize_blockframe (void);
-/* Is ADDR inside the startup file? Note that if your machine has a
- way to detect the bottom of the stack, there is no need to call
- this function from DEPRECATED_FRAME_CHAIN_VALID; the reason for
- doing so is that some machines have no way of detecting bottom of
- stack.
-
- A PC of zero is always considered to be the bottom of the stack. */
-
-int
-deprecated_inside_entry_file (CORE_ADDR addr)
-{
- if (addr == 0)
- return 1;
- if (symfile_objfile == 0)
- return 0;
- if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT
- || CALL_DUMMY_LOCATION == AT_SYMBOL)
- {
- /* Do not stop backtracing if the pc is in the call dummy
- at the entry point. */
- /* FIXME: Won't always work with zeros for the last two arguments */
- if (DEPRECATED_PC_IN_CALL_DUMMY (addr, 0, 0))
- return 0;
- }
- return (addr >= symfile_objfile->ei.deprecated_entry_file_lowpc &&
- addr < symfile_objfile->ei.deprecated_entry_file_highpc);
-}
-
/* Test whether PC is in the range of addresses that corresponds to
the "main" function. */
&& symfile_objfile->ei.entry_func_highpc > pc);
}
-/* Return nonzero if the function for this frame lacks a prologue. Many
- machines can define FRAMELESS_FUNCTION_INVOCATION to just call this
- function. */
+/* Return nonzero if the function for this frame lacks a prologue.
+ Many machines can define DEPRECATED_FRAMELESS_FUNCTION_INVOCATION
+ to just call this function. */
int
-frameless_look_for_prologue (struct frame_info *frame)
+legacy_frameless_look_for_prologue (struct frame_info *frame)
{
CORE_ADDR func_start;
if (func_start)
{
func_start += FUNCTION_START_OFFSET;
- /* This is faster, since only care whether there *is* a
- prologue, not how long it is. */
- return PROLOGUE_FRAMELESS_P (func_start);
+ /* NOTE: cagney/2004-02-09: Eliminated per-architecture
+ PROLOGUE_FRAMELESS_P call as architectures with custom
+ implementations had all been deleted. Eventually even this
+ function can go - GDB no longer tries to differentiate
+ between framed, frameless and stackless functions. They are
+ all now considered equally evil :-^. */
+ /* If skipping the prologue ends up skips nothing, there must be
+ no prologue and hence no code creating a frame. There for
+ the function is "frameless" :-/. */
+ return func_start == SKIP_PROLOGUE (func_start);
}
else if (get_frame_pc (frame) == 0)
/* A frame with a zero PC is usually created by dereferencing a
If it fails, it sets *NAME, *ADDRESS, and *ENDADDR to zero and
returns 0. */
+/* Backward compatibility, no section argument. */
+
int
-find_pc_sect_partial_function (CORE_ADDR pc, asection *section, char **name,
- CORE_ADDR *address, CORE_ADDR *endaddr)
+find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
+ CORE_ADDR *endaddr)
{
+ struct bfd_section *section;
struct partial_symtab *pst;
struct symbol *f;
struct minimal_symbol *msymbol;
int i;
CORE_ADDR mapped_pc;
+ /* To ensure that the symbol returned belongs to the correct setion
+ (and that the last [random] symbol from the previous section
+ isn't returned) try to find the section containing PC. First try
+ the overlay code (which by default returns NULL); and second try
+ the normal section code (which almost always succeeds). */
+ section = find_pc_overlay (pc);
+ if (section == NULL)
+ {
+ struct obj_section *obj_section = find_pc_section (pc);
+ if (obj_section == NULL)
+ section = NULL;
+ else
+ section = obj_section->the_bfd_section;
+ }
+
mapped_pc = overlay_mapped_address (pc, section);
if (mapped_pc >= cache_pc_function_low
&& section == cache_pc_function_section)
goto return_cached_value;
- /* If sigtramp is in the u area, it counts as a function (especially
- important for step_1). */
- if (SIGTRAMP_START_P () && PC_IN_SIGTRAMP (mapped_pc, (char *) NULL))
- {
- cache_pc_function_low = SIGTRAMP_START (mapped_pc);
- cache_pc_function_high = SIGTRAMP_END (mapped_pc);
- cache_pc_function_name = "<sigtramp>";
- cache_pc_function_section = section;
- goto return_cached_value;
- }
-
msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section);
pst = find_pc_sect_psymtab (mapped_pc, section);
if (pst)
return 1;
}
-/* Backward compatibility, no section argument. */
-
-int
-find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
- CORE_ADDR *endaddr)
-{
- asection *section;
-
- section = find_pc_overlay (pc);
- return find_pc_sect_partial_function (pc, section, name, address, endaddr);
-}
-
/* Return the innermost stack frame executing inside of BLOCK,
or NULL if there is no such frame. If BLOCK is NULL, just return NULL. */
below is for infrun.c, which may give the macro a pc without that
subtracted out. */
-/* Is the PC in a call dummy? SP and FRAME_ADDRESS are the bottom and
- top of the stack frame which we are checking, where "bottom" and
- "top" refer to some section of memory which contains the code for
- the call dummy. Calls to this macro assume that the contents of
- SP_REGNUM and DEPRECATED_FP_REGNUM (or the saved values thereof),
- respectively, are the things to pass.
-
- This won't work on the 29k, where SP_REGNUM and
- DEPRECATED_FP_REGNUM don't have that meaning, but the 29k doesn't
- use ON_STACK. This could be fixed by generalizing this scheme,
- perhaps by passing in a frame and adding a few fields, at least on
- machines which need them for DEPRECATED_PC_IN_CALL_DUMMY.
-
- Something simpler, like checking for the stack segment, doesn't work,
- since various programs (threads implementations, gcc nested function
- stubs, etc) may either allocate stack frames in another segment, or
- allocate other kinds of code on the stack. */
-
-int
-deprecated_pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp,
- CORE_ADDR frame_address)
-{
- return (INNER_THAN ((sp), (pc))
- && (frame_address != 0)
- && INNER_THAN ((pc), (frame_address)));
-}
-
-int
-deprecated_pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
- CORE_ADDR frame_address)
-{
- CORE_ADDR addr = entry_point_address ();
- if (DEPRECATED_CALL_DUMMY_ADDRESS_P ())
- addr = DEPRECATED_CALL_DUMMY_ADDRESS ();
- return ((pc) >= addr && (pc) <= (addr + DECR_PC_AFTER_BREAK));
-}
-
/* Returns true for a user frame or a call_function_by_hand dummy
frame, and false for the CRT0 start-up frame. Purpose is to
terminate backtrace. */
legacy_frame_chain_valid (CORE_ADDR fp, struct frame_info *fi)
{
/* Don't prune CALL_DUMMY frames. */
- if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES
- && DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), 0, 0))
+ if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), 0, 0))
return 1;
/* If the new frame pointer is zero, then it isn't valid. */
if (legacy_inside_entry_func (get_frame_pc (fi)))
return 0;
- /* If we're inside the entry file, it isn't valid. */
- /* NOTE/drow 2002-12-25: should there be a way to disable this check? It
- assumes a single small entry file, and the way some debug readers (e.g.
- dbxread) figure out which object is the entry file is somewhat hokey. */
- if (deprecated_inside_entry_file (frame_pc_unwind (fi)))
- return 0;
-
return 1;
}
projects / deliverable / binutils-gdb.git / blobdiff