/* 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
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 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"
#include "command.h"
#include "gdbcmd.h"
#include "block.h"
+#include "inline-frame.h"
-/* Prototypes for exported functions. */
-
-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.
+/* Return the innermost lexical block in execution in a specified
+ stack frame. The frame address is assumed valid.
If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the exact code
address we used to choose the block. We use this to find a source
struct block *
get_frame_block (struct frame_info *frame, CORE_ADDR *addr_in_block)
{
- const CORE_ADDR pc = get_frame_address_in_block (frame);
+ CORE_ADDR pc;
+ struct block *bl;
+ int inline_count;
+
+ if (!get_frame_address_in_block_if_available (frame, &pc))
+ return NULL;
if (addr_in_block)
*addr_in_block = pc;
- return block_for_pc (pc);
+ bl = block_for_pc (pc);
+ if (bl == NULL)
+ return NULL;
+
+ inline_count = frame_inlined_callees (frame);
+
+ while (inline_count > 0)
+ {
+ if (block_inlined_p (bl))
+ inline_count--;
+
+ bl = BLOCK_SUPERBLOCK (bl);
+ gdb_assert (bl != NULL);
+ }
+
+ return bl;
}
CORE_ADDR
get_pc_function_start (CORE_ADDR pc)
{
struct block *bl;
- struct minimal_symbol *msymbol;
+ struct bound_minimal_symbol msymbol;
bl = block_for_pc (pc);
if (bl)
{
- struct symbol *symbol = block_function (bl);
+ struct symbol *symbol = block_linkage_function (bl);
if (symbol)
{
}
msymbol = lookup_minimal_symbol_by_pc (pc);
- if (msymbol)
+ if (msymbol.minsym)
{
- CORE_ADDR fstart = SYMBOL_VALUE_ADDRESS (msymbol);
+ CORE_ADDR fstart = BMSYMBOL_VALUE_ADDRESS (msymbol);
if (find_pc_section (fstart))
return fstart;
get_frame_function (struct frame_info *frame)
{
struct block *bl = get_frame_block (frame, 0);
- if (bl == 0)
- return 0;
- return block_function (bl);
+
+ if (bl == NULL)
+ return NULL;
+
+ while (BLOCK_FUNCTION (bl) == NULL && BLOCK_SUPERBLOCK (bl) != NULL)
+ bl = BLOCK_SUPERBLOCK (bl);
+
+ return BLOCK_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.
- Returns 0 if function is not known. Backward compatibility, no section */
+ Returns 0 if function is not known.
+ Backward compatibility, no section */
struct symbol *
find_pc_function (CORE_ADDR pc)
}
/* These variables are used to cache the most recent result
- * of find_pc_partial_function. */
+ of find_pc_partial_function. */
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 const char *cache_pc_function_name = 0;
+static struct obj_section *cache_pc_function_section = NULL;
+static int cache_pc_function_is_gnu_ifunc = 0;
-/* Clear cache, e.g. when symbol table is discarded. */
+/* Clear cache, e.g. when symbol table is discarded. */
void
clear_pc_function_cache (void)
cache_pc_function_high = 0;
cache_pc_function_name = (char *) 0;
cache_pc_function_section = NULL;
+ cache_pc_function_is_gnu_ifunc = 0;
}
/* Finds the "function" (text symbol) that is smaller than PC but
*NAME and/or *ADDRESS conditionally if that pointer is non-null.
If ENDADDR is non-null, then set *ENDADDR to be the end of the
function (exclusive), but passing ENDADDR as non-null means that
- the function might cause symbols to be read. This function either
- succeeds or fails (not halfway succeeds). If it succeeds, it sets
- *NAME, *ADDRESS, and *ENDADDR to real information and returns 1.
- If it fails, it sets *NAME, *ADDRESS, and *ENDADDR to zero and
- returns 0. */
+ the function might cause symbols to be read. If IS_GNU_IFUNC_P is provided
+ *IS_GNU_IFUNC_P is set to 1 on return if the function is STT_GNU_IFUNC.
+ This function either succeeds or fails (not halfway succeeds). If it
+ succeeds, it sets *NAME, *ADDRESS, and *ENDADDR to real information and
+ returns 1. If it fails, it sets *NAME, *ADDRESS, *ENDADDR and
+ *IS_GNU_IFUNC_P to zero and returns 0. */
/* Backward compatibility, no section argument. */
int
-find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
- CORE_ADDR *endaddr)
+find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, const char **name,
+ CORE_ADDR *address, CORE_ADDR *endaddr,
+ int *is_gnu_ifunc_p)
{
- struct bfd_section *section;
- struct partial_symtab *pst;
+ struct obj_section *section;
struct symbol *f;
- struct minimal_symbol *msymbol;
- struct partial_symbol *psb;
- struct obj_section *osect;
+ struct bound_minimal_symbol msymbol;
+ struct symtab *symtab = NULL;
+ struct objfile *objfile;
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);
goto return_cached_value;
msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section);
- pst = find_pc_sect_psymtab (mapped_pc, section);
- if (pst)
+ ALL_OBJFILES (objfile)
+ {
+ if (objfile->sf)
+ symtab = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
+ mapped_pc, section, 0);
+ if (symtab)
+ break;
+ }
+
+ if (symtab)
{
- /* Need to read the symbols to get a good value for the end address. */
- if (endaddr != NULL && !pst->readin)
+ /* Checking whether the msymbol has a larger value is for the
+ "pathological" case mentioned in print_frame_info. */
+ f = find_pc_sect_function (mapped_pc, section);
+ if (f != NULL
+ && (msymbol.minsym == NULL
+ || (BLOCK_START (SYMBOL_BLOCK_VALUE (f))
+ >= BMSYMBOL_VALUE_ADDRESS (msymbol))))
{
- /* Need to get the terminal in case symbol-reading produces
- output. */
- target_terminal_ours_for_output ();
- PSYMTAB_TO_SYMTAB (pst);
- }
-
- if (pst->readin)
- {
- /* Checking whether the msymbol has a larger value is for the
- "pathological" case mentioned in print_frame_info. */
- f = find_pc_sect_function (mapped_pc, section);
- if (f != NULL
- && (msymbol == NULL
- || (BLOCK_START (SYMBOL_BLOCK_VALUE (f))
- >= SYMBOL_VALUE_ADDRESS (msymbol))))
- {
- 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_section = section;
- goto return_cached_value;
- }
- }
- else
- {
- /* Now that static symbols go in the minimal symbol table, perhaps
- we could just ignore the partial symbols. But at least for now
- we use the partial or minimal symbol, whichever is larger. */
- psb = find_pc_sect_psymbol (pst, mapped_pc, section);
-
- if (psb
- && (msymbol == NULL ||
- (SYMBOL_VALUE_ADDRESS (psb)
- >= SYMBOL_VALUE_ADDRESS (msymbol))))
- {
- /* This case isn't being cached currently. */
- if (address)
- *address = SYMBOL_VALUE_ADDRESS (psb);
- if (name)
- *name = DEPRECATED_SYMBOL_NAME (psb);
- /* endaddr non-NULL can't happen here. */
- return 1;
- }
+ cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f));
+ cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f));
+ cache_pc_function_name = SYMBOL_LINKAGE_NAME (f);
+ cache_pc_function_section = section;
+ cache_pc_function_is_gnu_ifunc = TYPE_GNU_IFUNC (SYMBOL_TYPE (f));
+ goto return_cached_value;
}
}
- /* Not in the normal symbol tables, see if the pc is in a known section.
- If it's not, then give up. This ensures that anything beyond the end
- 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);
+ /* Not in the normal symbol tables, see if the pc is in a known
+ section. If it's not, then give up. This ensures that anything
+ beyond the end of the text seg doesn't appear to be part of the
+ last function in the text segment. */
- if (!osect)
- msymbol = NULL;
+ if (!section)
+ msymbol.minsym = NULL;
/* Must be in the minimal symbol table. */
- if (msymbol == NULL)
+ if (msymbol.minsym == NULL)
{
/* No available symbol. */
if (name != NULL)
*address = 0;
if (endaddr != NULL)
*endaddr = 0;
+ if (is_gnu_ifunc_p != NULL)
+ *is_gnu_ifunc_p = 0;
return 0;
}
- cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol);
- cache_pc_function_name = DEPRECATED_SYMBOL_NAME (msymbol);
+ cache_pc_function_low = BMSYMBOL_VALUE_ADDRESS (msymbol);
+ cache_pc_function_name = MSYMBOL_LINKAGE_NAME (msymbol.minsym);
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. */
-
- /* 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 (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol)
- && SYMBOL_BFD_SECTION (msymbol + i) == SYMBOL_BFD_SECTION (msymbol))
- break;
- }
-
- 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;
+ cache_pc_function_is_gnu_ifunc = (MSYMBOL_TYPE (msymbol.minsym)
+ == mst_text_gnu_ifunc);
+ cache_pc_function_high = minimal_symbol_upper_bound (msymbol);
return_cached_value:
/* Because the high address is actually beyond the end of
the function (and therefore possibly beyond the end of
the overlay), we must actually convert (high - 1) and
- then add one to that. */
+ then add one to that. */
*endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1,
section);
*endaddr = cache_pc_function_high;
}
+ if (is_gnu_ifunc_p)
+ *is_gnu_ifunc_p = cache_pc_function_is_gnu_ifunc;
+
return 1;
}
-/* Return the innermost stack frame executing inside of BLOCK,
- or NULL if there is no such frame. If BLOCK is NULL, just return NULL. */
+/* See find_pc_partial_function_gnu_ifunc, only the IS_GNU_IFUNC_P parameter
+ is omitted here for backward API compatibility. */
+
+int
+find_pc_partial_function (CORE_ADDR pc, const char **name, CORE_ADDR *address,
+ CORE_ADDR *endaddr)
+{
+ return find_pc_partial_function_gnu_ifunc (pc, name, address, endaddr, NULL);
+}
+
+/* Return the innermost stack frame that is executing inside of BLOCK and is
+ at least as old as the selected frame. Return NULL if there is no
+ such frame. If BLOCK is NULL, just return NULL. */
struct frame_info *
-block_innermost_frame (struct block *block)
+block_innermost_frame (const struct block *block)
{
struct frame_info *frame;
- CORE_ADDR start;
- CORE_ADDR end;
- CORE_ADDR calling_pc;
if (block == NULL)
return NULL;
- start = BLOCK_START (block);
- end = BLOCK_END (block);
-
- frame = NULL;
- while (1)
+ frame = get_selected_frame_if_set ();
+ if (frame == NULL)
+ 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)
+ struct block *frame_block = get_frame_block (frame, NULL);
+ if (frame_block != NULL && contained_in (frame_block, block))
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