/* Get info from stack frames; convert between frames, blocks,
functions and pc values.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "objfiles.h"
#include "frame.h"
#include "gdbcore.h"
-#include "value.h" /* for read_register */
-#include "target.h" /* for target_has_stack */
-#include "inferior.h" /* for read_pc */
+#include "value.h"
+#include "target.h"
+#include "inferior.h"
#include "annotate.h"
#include "regcache.h"
#include "gdb_assert.h"
void _initialize_blockframe (void);
-/* Test whether PC is in the range of addresses that corresponds to
- the "main" function. */
-
-int
-inside_main_func (CORE_ADDR pc)
-{
- struct minimal_symbol *msymbol;
-
- if (symfile_objfile == 0)
- return 0;
-
- msymbol = lookup_minimal_symbol (main_name (), NULL, symfile_objfile);
-
- /* If the address range hasn't been set up at symbol reading time,
- set it up now. */
-
- if (msymbol != NULL
- && symfile_objfile->ei.main_func_lowpc == INVALID_ENTRY_LOWPC
- && symfile_objfile->ei.main_func_highpc == INVALID_ENTRY_HIGHPC)
- {
- /* brobecker/2003-10-10: We used to rely on lookup_symbol() to
- search the symbol associated to the "main" function.
- Unfortunately, lookup_symbol() uses the current-language
- la_lookup_symbol_nonlocal function to do the global symbol
- search. Depending on the language, this can introduce
- certain side-effects, because certain languages, for instance
- Ada, may find more than one match. Therefore we prefer to
- search the "main" function symbol using its address rather
- than its name. */
- struct symbol *mainsym =
- find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol));
-
- if (mainsym && SYMBOL_CLASS (mainsym) == LOC_BLOCK)
- {
- symfile_objfile->ei.main_func_lowpc =
- BLOCK_START (SYMBOL_BLOCK_VALUE (mainsym));
- symfile_objfile->ei.main_func_highpc =
- BLOCK_END (SYMBOL_BLOCK_VALUE (mainsym));
- }
- }
-
- /* Not in the normal symbol tables, see if "main" is in the partial
- symbol table. If it's not, then give up. */
- if (msymbol != NULL && MSYMBOL_TYPE (msymbol) == mst_text)
- {
- CORE_ADDR maddr = SYMBOL_VALUE_ADDRESS (msymbol);
- asection *msect = SYMBOL_BFD_SECTION (msymbol);
- struct obj_section *osect = find_pc_sect_section (maddr, msect);
-
- if (osect != NULL)
- {
- int i;
-
- /* Step over other symbols at this same address, and symbols
- in other sections, to find the next symbol in this
- section with a different address. */
- for (i = 1; SYMBOL_LINKAGE_NAME (msymbol + i) != NULL; i++)
- {
- if (SYMBOL_VALUE_ADDRESS (msymbol + i) != maddr
- && SYMBOL_BFD_SECTION (msymbol + i) == msect)
- break;
- }
-
- symfile_objfile->ei.main_func_lowpc = maddr;
-
- /* Use the lesser of the next minimal symbol in the same
- section, or the end of the section, as the end of the
- function. */
- if (SYMBOL_LINKAGE_NAME (msymbol + i) != NULL
- && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr)
- symfile_objfile->ei.main_func_highpc =
- SYMBOL_VALUE_ADDRESS (msymbol + i);
- else
- /* We got the start address from the last msymbol in the
- objfile. So the end address is the end of the
- section. */
- symfile_objfile->ei.main_func_highpc = osect->endaddr;
- }
- }
-
- return (symfile_objfile->ei.main_func_lowpc <= pc
- && symfile_objfile->ei.main_func_highpc > pc);
-}
-
-/* Test whether THIS_FRAME is inside the process entry point function. */
-
-int
-inside_entry_func (struct frame_info *this_frame)
-{
- return (get_frame_func (this_frame) == entry_point_address ());
-}
-
-/* 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
-legacy_frameless_look_for_prologue (struct frame_info *frame)
-{
- CORE_ADDR func_start;
-
- func_start = get_frame_func (frame);
- if (func_start)
- {
- func_start += DEPRECATED_FUNCTION_START_OFFSET;
- /* 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
- NULL function pointer, normally causing an immediate core dump
- of the inferior. Mark function as frameless, as the inferior
- has no chance of setting up a stack frame. */
- return 1;
- else
- /* If we can't find the start of the function, we don't really
- know whether the function is frameless, but we should be able
- to get a reasonable (i.e. best we can do under the
- circumstances) backtrace by saying that it isn't. */
- return 0;
-}
-
/* Return the innermost lexical block in execution
in a specified stack frame. The frame address is assumed valid.
bl = block_for_pc (pc);
if (bl)
{
- struct symbol *symbol = block_function (bl);
+ struct symbol *symbol = block_linkage_function (bl);
if (symbol)
{
struct block *bl = get_frame_block (frame, 0);
if (bl == 0)
return 0;
- return block_function (bl);
+ return block_linkage_function (bl);
}
\f
Returns 0 if function is not known. */
struct symbol *
-find_pc_sect_function (CORE_ADDR pc, struct bfd_section *section)
+find_pc_sect_function (CORE_ADDR pc, struct obj_section *section)
{
struct block *b = block_for_pc_sect (pc, section);
if (b == 0)
return 0;
- return block_function (b);
+ return block_linkage_function (b);
}
/* Return the function containing pc value PC.
static CORE_ADDR cache_pc_function_low = 0;
static CORE_ADDR cache_pc_function_high = 0;
static char *cache_pc_function_name = 0;
-static struct bfd_section *cache_pc_function_section = NULL;
+static struct obj_section *cache_pc_function_section = NULL;
/* Clear cache, e.g. when symbol table is discarded. */
find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
CORE_ADDR *endaddr)
{
- struct bfd_section *section;
+ struct obj_section *section;
struct partial_symtab *pst;
struct symbol *f;
struct minimal_symbol *msymbol;
struct partial_symbol *psb;
- struct obj_section *osect;
int i;
CORE_ADDR mapped_pc;
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;
- }
+ section = find_pc_section (pc);
mapped_pc = overlay_mapped_address (pc, section);
{
cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f));
cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f));
- cache_pc_function_name = DEPRECATED_SYMBOL_NAME (f);
+ cache_pc_function_name = SYMBOL_LINKAGE_NAME (f);
cache_pc_function_section = section;
goto return_cached_value;
}
if (address)
*address = SYMBOL_VALUE_ADDRESS (psb);
if (name)
- *name = DEPRECATED_SYMBOL_NAME (psb);
+ *name = SYMBOL_LINKAGE_NAME (psb);
/* endaddr non-NULL can't happen here. */
return 1;
}
of the text seg doesn't appear to be part of the last function in the
text segment. */
- osect = find_pc_sect_section (mapped_pc, section);
-
- if (!osect)
+ if (!section)
msymbol = NULL;
/* Must be in the minimal symbol table. */
}
cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol);
- cache_pc_function_name = DEPRECATED_SYMBOL_NAME (msymbol);
+ cache_pc_function_name = SYMBOL_LINKAGE_NAME (msymbol);
cache_pc_function_section = section;
- /* Use the lesser of the next minimal symbol in the same section, or
- the end of the section, as the end of the function. */
+ /* If the minimal symbol has a size, use it for the cache.
+ Otherwise use the lesser of the next minimal symbol in the same
+ section, or the end of the section, as the end of the
+ function. */
- /* Step over other symbols at this same address, and symbols in
- other sections, to find the next symbol in this section with
- a different address. */
-
- for (i = 1; DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL; i++)
+ if (MSYMBOL_SIZE (msymbol) != 0)
+ cache_pc_function_high = cache_pc_function_low + MSYMBOL_SIZE (msymbol);
+ else
{
- if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol)
- && SYMBOL_BFD_SECTION (msymbol + i) == SYMBOL_BFD_SECTION (msymbol))
- break;
- }
+ /* Step over other symbols at this same address, and symbols in
+ other sections, to find the next symbol in this section with
+ a different address. */
- if (DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL
- && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr)
- cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i);
- else
- /* We got the start address from the last msymbol in the objfile.
- So the end address is the end of the section. */
- cache_pc_function_high = osect->endaddr;
+ for (i = 1; SYMBOL_LINKAGE_NAME (msymbol + i) != NULL; i++)
+ {
+ if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol)
+ && SYMBOL_OBJ_SECTION (msymbol + i) == SYMBOL_OBJ_SECTION (msymbol))
+ break;
+ }
+
+ if (SYMBOL_LINKAGE_NAME (msymbol + i) != NULL
+ && SYMBOL_VALUE_ADDRESS (msymbol + i) < obj_section_endaddr (section))
+ cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i);
+ else
+ /* We got the start address from the last msymbol in the objfile.
+ So the end address is the end of the section. */
+ cache_pc_function_high = obj_section_endaddr (section);
+ }
return_cached_value:
start = BLOCK_START (block);
end = BLOCK_END (block);
- frame = NULL;
- while (1)
+ frame = get_current_frame ();
+ while (frame != NULL)
{
- frame = get_prev_frame (frame);
- if (frame == NULL)
- return NULL;
calling_pc = get_frame_address_in_block (frame);
if (calling_pc >= start && calling_pc < end)
return frame;
- }
-}
-
-/* Are we in a call dummy? The code below which allows DECR_PC_AFTER_BREAK
- below is for infrun.c, which may give the macro a pc without that
- subtracted out. */
-/* 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. */
-
-int
-legacy_frame_chain_valid (CORE_ADDR fp, struct frame_info *fi)
-{
- /* Don't prune CALL_DUMMY frames. */
- if (deprecated_pc_in_call_dummy (get_frame_pc (fi)))
- return 1;
-
- /* If the new frame pointer is zero, then it isn't valid. */
- if (fp == 0)
- return 0;
-
- /* If the new frame would be inside (younger than) the previous frame,
- then it isn't valid. */
- if (INNER_THAN (fp, get_frame_base (fi)))
- return 0;
-
- /* If the architecture has a custom DEPRECATED_FRAME_CHAIN_VALID,
- call it now. */
- if (DEPRECATED_FRAME_CHAIN_VALID_P ())
- return DEPRECATED_FRAME_CHAIN_VALID (fp, fi);
-
- /* If we're already inside the entry function for the main objfile,
- then it isn't valid. */
- if (inside_entry_func (fi))
- return 0;
+ frame = get_prev_frame (frame);
+ }
- return 1;
+ return NULL;
}
projects / deliverable / binutils-gdb.git / blobdiff