/* Get info from stack frames; convert between frames, blocks,
functions and pc values.
- Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
- 2010 Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "annotate.h"
#include "regcache.h"
-#include "gdb_assert.h"
#include "dummy-frame.h"
#include "command.h"
#include "gdbcmd.h"
#include "block.h"
#include "inline-frame.h"
-#include "psymtab.h"
-/* 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
--- hopefully pointing us at the call instruction, or its delay
slot instruction. */
-struct block *
+const struct block *
get_frame_block (struct frame_info *frame, CORE_ADDR *addr_in_block)
{
- const CORE_ADDR pc = get_frame_address_in_block (frame);
- struct block *bl;
+ CORE_ADDR pc;
+ const 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;
CORE_ADDR
get_pc_function_start (CORE_ADDR pc)
{
- struct block *bl;
- struct minimal_symbol *msymbol;
+ const struct block *bl;
+ struct bound_minimal_symbol msymbol;
bl = block_for_pc (pc);
if (bl)
}
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;
struct symbol *
get_frame_function (struct frame_info *frame)
{
- struct block *bl = get_frame_block (frame, 0);
+ const struct block *bl = get_frame_block (frame, 0);
if (bl == NULL)
return NULL;
struct symbol *
find_pc_sect_function (CORE_ADDR pc, struct obj_section *section)
{
- struct block *b = block_for_pc_sect (pc, section);
+ const struct block *b = block_for_pc_sect (pc, section);
if (b == 0)
return 0;
}
/* 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 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 obj_section *section;
struct symbol *f;
- struct minimal_symbol *msymbol;
- struct symtab *symtab = NULL;
+ struct bound_minimal_symbol msymbol;
+ struct compunit_symtab *compunit_symtab = NULL;
struct objfile *objfile;
int i;
CORE_ADDR mapped_pc;
ALL_OBJFILES (objfile)
{
if (objfile->sf)
- symtab = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
- mapped_pc, section, 0);
- if (symtab)
+ {
+ compunit_symtab
+ = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol,
+ mapped_pc, section,
+ 0);
+ }
+ if (compunit_symtab != NULL)
break;
}
- if (symtab)
+ if (compunit_symtab != NULL)
{
/* 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
+ && (msymbol.minsym == NULL
|| (BLOCK_START (SYMBOL_BLOCK_VALUE (f))
- >= SYMBOL_VALUE_ADDRESS (msymbol))))
+ >= BMSYMBOL_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 = 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. */
+ /* 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 (!section)
- msymbol = NULL;
+ 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 = SYMBOL_LINKAGE_NAME (msymbol);
+ cache_pc_function_low = BMSYMBOL_VALUE_ADDRESS (msymbol);
+ cache_pc_function_name = MSYMBOL_LINKAGE_NAME (msymbol.minsym);
cache_pc_function_section = section;
-
- /* 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. */
-
- if (MSYMBOL_SIZE (msymbol) != 0)
- cache_pc_function_high = cache_pc_function_low + MSYMBOL_SIZE (msymbol);
- else
- {
- /* 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) != 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);
- }
+ 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;
if (block == NULL)
return NULL;
- start = BLOCK_START (block);
- end = BLOCK_END (block);
-
- frame = get_current_frame ();
+ frame = get_selected_frame_if_set ();
+ if (frame == NULL)
+ frame = get_current_frame ();
while (frame != NULL)
{
- struct block *frame_block = get_frame_block (frame, NULL);
+ const struct block *frame_block = get_frame_block (frame, NULL);
if (frame_block != NULL && contained_in (frame_block, block))
return frame;
projects / deliverable / binutils-gdb.git / blobdiff