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Support crt0 <-> ld.so interface version 4. This should be both backwards

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and forwards compatable with version 3.  This is needed to enable storing
a run-time library path in the dynamic linking headers.  The crt startup
tries version 4 first, and falls back to version 3, so an executable that
is linked on -current will work with the ld.so on 2.1.x and less.

Reviewed by: nate, jdp
Obtained from: NetBSD
This commit is contained in:
Peter Wemm 1996-10-01 00:54:48 +00:00
parent 1a3709045d
commit 4e89f352f0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=18593
1 changed files with 11 additions and 5 deletions
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16
lib/csu/i386/crt0.c
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@ -27,7 +27,7 @@
* (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: crt0.c,v 1.21 1995/11/02 12:42:42 ache Exp $
* $Id: crt0.c,v 1.23 1996/01/30 05:55:20 nate Exp $
*/
#include <sys/param.h>
@ -249,13 +249,20 @@ __do_dynamic_link ()
crt.crt_ep = environ;
crt.crt_bp = (caddr_t)_callmain;
crt.crt_prog = __progname;
crt.crt_ldentry = NULL;
entry = (int (*)())(crt.crt_ba + sizeof hdr);
ret = (*entry)(CRT_VERSION_BSD_3, &crt);
ret = (*entry)(CRT_VERSION_BSD_4, &crt);
ld_entry = crt.crt_ldentry;
if (ret == -1 && ld_entry == NULL) {
/* if version 4 not recognised, try version 3 */
ret = (*entry)(CRT_VERSION_BSD_3, &crt);
ld_entry = _DYNAMIC.d_entry;
}
if (ret == -1) {
_PUTMSG("ld.so failed");
if(_DYNAMIC.d_entry != NULL) {
char *msg = (_DYNAMIC.d_entry->dlerror)();
if (ld_entry != NULL) {
char *msg = (ld_entry->dlerror)();
if(msg != NULL) {
char *endp;
_PUTMSG(": ");
@ -267,7 +274,6 @@ __do_dynamic_link ()
_FATAL("\n");
}
ld_entry = _DYNAMIC.d_entry;
if (ret >= LDSO_VERSION_HAS_DLEXIT)
atexit(ld_entry->dlexit);