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Call do_ctors() and do_dtors() using indirect calls through function

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pointers.  The calls are in different sections from the functions
being called, and they can potentially be far away.  On a very large
program, the 21-bit displacement field of the BSR instruction
overflowed at link time.
This commit is contained in:
John Polstra 1999-06-06 15:59:08 +00:00
parent 735df1561f
commit 5ae2733874
1 changed files with 12 additions and 3 deletions
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15
lib/csu/alpha/crtbegin.c
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@ -22,7 +22,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: crtbegin.c,v 1.1.1.1 1998/03/07 20:27:10 jdp Exp $
* $Id: crtbegin.c,v 1.3 1998/03/11 20:48:56 jb Exp $
*/
typedef void (*fptr)(void);
@ -51,12 +51,21 @@ do_dtors(void)
(**fpp)();
}
/*
* On very large programs, it is possible to get a relocation overflow
* of the 21-bit BSR displacements. It is particularly likely for the
* calls from _init() and _fini(), because they are in separate sections.
* Avoid the problem by forcing indirect calls.
*/
static void (*p_do_ctors)(void) = do_ctors;
static void (*p_do_dtors)(void) = do_dtors;
extern void _init(void) __attribute__((section(".init")));
void
_init(void)
{
do_ctors();
(*p_do_ctors)();
}
extern void _fini(void) __attribute__((section(".fini")));
@ -64,5 +73,5 @@ extern void _fini(void) __attribute__((section(".fini")));
void
_fini(void)
{
do_dtors();
(*p_do_dtors)();
}