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GDB find_pc_partial_function support for STT_GNU_IFUNC.
	* blockframe.c (cache_pc_function_is_gnu_ifunc): New variable.
	(clear_pc_function_cache): Clear it.
	(find_pc_partial_function): Rename to ...
	(find_pc_partial_function_gnu_ifunc): ... this function.  New
	parameter is_gnu_ifunc_p, describe it.  Set *IS_GNU_IFUNC_P.
	(find_pc_partial_function): New wrapper for this function.
	* symtab.h (find_pc_partial_function_gnu_ifunc): New declaration.
This commit is contained in:
Jan Kratochvil 2011-03-28 20:22:52 +00:00
parent 0875794a96
commit 11c8145561
3 changed files with 44 additions and 7 deletions
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11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2011-03-28 Jan Kratochvil <jan.kratochvil@redhat.com>
GDB find_pc_partial_function support for STT_GNU_IFUNC.
* blockframe.c (cache_pc_function_is_gnu_ifunc): New variable.
(clear_pc_function_cache): Clear it.
(find_pc_partial_function): Rename to ...
(find_pc_partial_function_gnu_ifunc): ... this function. New
parameter is_gnu_ifunc_p, describe it. Set *IS_GNU_IFUNC_P.
(find_pc_partial_function): New wrapper for this function.
* symtab.h (find_pc_partial_function_gnu_ifunc): New declaration.
2011-03-28 Jan Kratochvil <jan.kratochvil@redhat.com>
GDB internal type support for STT_GNU_IFUNC.

35
gdb/blockframe.c
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@ -163,6 +163,7 @@ 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 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. */
@ -173,6 +174,7 @@ 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
@ -180,17 +182,19 @@ clear_pc_function_cache (void)
*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, char **name,
CORE_ADDR *address, CORE_ADDR *endaddr,
int *is_gnu_ifunc_p)
{
struct obj_section *section;
struct symbol *f;
@ -240,6 +244,7 @@ find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
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;
}
}
@ -262,12 +267,15 @@ find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
*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_section = section;
cache_pc_function_is_gnu_ifunc = MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc;
/* If the minimal symbol has a size, use it for the cache.
Otherwise use the lesser of the next minimal symbol in the same
@ -330,9 +338,22 @@ find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address,
*endaddr = cache_pc_function_high;
}
if (is_gnu_ifunc_p)
*is_gnu_ifunc_p = cache_pc_function_is_gnu_ifunc;
return 1;
}
/* 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, 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 executing inside of BLOCK, or NULL
if there is no such frame. If BLOCK is NULL, just return NULL. */

5
gdb/symtab.h
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@ -956,6 +956,11 @@ extern struct symbol *find_pc_function (CORE_ADDR);
extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *);
extern int find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, char **name,
CORE_ADDR *address,
CORE_ADDR *endaddr,
int *is_gnu_ifunc_p);
/* lookup function from address, return name, start addr and end addr. */
extern int find_pc_partial_function (CORE_ADDR, char **, CORE_ADDR *,