PERFORCE change 135232 for review

[Oleksandr Tymoshenko]

http://perforce.freebsd.org/chv.cgi?CH=135232

Change 135232 by gonzo at gonzo_jeeves on 2008/02/12 01:18:18

	o Replace mips2 crt1.c with juniper's crt1.c. This is required 
	    because exec_setregs registers layout in mips2-jnpr tree differs
	    from one in mips2. Juniper's is more logical and less hackerish:
	    it uses a0 and a3 registers to pass unaligned stack address 
	    where arguments resides and ps_strings structs. _start from 
	    mips2 uses $sp register for getting arguments and does not pass 
	    ps_string struct at all. 
	    NOTE: This submit is just a copy from //depot/vendor/juniper-mips 
	    branch

Affected files ...

.. //depot/projects/mips2-jnpr/src/lib/csu/mips/crt1.c#2 edit

Differences ...

==== //depot/projects/mips2-jnpr/src/lib/csu/mips/crt1.c#2 (text+ko) ====

@@ -1,10 +1,6 @@
-/* LINTLIBRARY */
 /*-
- * Copyright 2001 David E. O'Brien.
- * All rights reserved.
  * Copyright 1996-1998 John D. Polstra.
  * All rights reserved.
- * Copyright (c) 1997 Jason R. Thorpe.
  * Copyright (c) 1995 Christopher G. Demetriou
  * All rights reserved.
  *
@@ -18,12 +14,8 @@
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
- *          This product includes software developed for the
- *          FreeBSD Project.  See http://www.freebsd.org/ for
- *          information about FreeBSD.
- *          This product includes software developed for the
- *          NetBSD Project.  See http://www.netbsd.org/ for
- *          information about NetBSD.
+ *      This product includes software developed by Christopher G. Demetriou
+ *    for the NetBSD Project.
  * 4. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission
  *
@@ -37,31 +29,32 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * FreeBSD: src/lib/csu/alpha/crt1.c,v 1.7.2.1 2000/10/30 20:32:23 obrien
  */
 
-#ifndef lint
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
 #ifndef __GNUC__
 #error "GCC is needed to compile this file"
 #endif
-#endif /* lint */
 
 #include <stdlib.h>
-
 #include "libc_private.h"
 #include "crtbrand.c"
-#include <machine/asm.h>
 
 struct Struct_Obj_Entry;
 struct ps_strings;
 
+#ifndef NOSHARED
 extern int _DYNAMIC;
 #pragma weak _DYNAMIC
+#endif
 
+extern void _init(void);
 extern void _fini(void);
-extern void _init(void);
 extern int main(int, char **, char **);
-extern void _start(int, char **, char **, const struct Struct_Obj_Entry *,
-    void (*)(void), struct ps_strings *);
 
 #ifdef GCRT
 extern void _mcleanup(void);
@@ -72,70 +65,37 @@
 
 char **environ;
 const char *__progname = "";
-struct ps_strings *__ps_strings;
+
+void __gccmain(void) {}
+void __main(void) {}
 
 /* The entry function. */
-__asm("	.text			\n"
-"	.align	8		\n"
-"	.globl	_start		\n"
-"	_start:			\n"
-"	.cpload $25		\n"
-"	/* Get cleanup routine and main object set by rtld */\n"
-"	/* Note that a2 is already set to ps_string by _rtld_start */\n"
-"	/* move	a3, a0        */\n"
-"	/* move	t0, a1        */\n"
-"	/* Get argc, argv from stack */	\n"
-"	/* lw	a0, 0(sp)     */\n"
-"	/* move	a1, sp        */\n"
-"	/* addu	a1, 4         */\n"
-"				\n"
-"	/* Stack should 8bytes aligned */\n"
-"	/* required by ABI to pass     */\n"
-"	/* 64-bits arguments           */\n"
-"	/* and	sp, ~8        */\n"
-"	/* subu	sp, sp, 20    */\n"
-"	/* sw	t0, 16(sp)    */\n"
-"				\n"
-"	move	$7, $4		/* atexit */\n"
-"	move	$8, $5		/* main_obj entry */\n"
-"	lw	$4, 0($29)	\n"
-"	move	$5, $29		\n"
-"	addu	$5, 4		\n"
-"				\n"
-"	and	$29, 0xfffffff8	\n"
-"	subu	$29, $29, 24	/* args slot + cleanup + 4 bytes padding */ \n"
-"	sw	$8, 16($29)	\n"
-"\n"
-"	la	 $25, __start  \n"
-"	nop	 \n"
-"	j	 $25\n");
-/* ARGSUSED */
-
 void
-__start(int argc, char **argv, struct ps_strings *ps_strings,
-     void (*cleanup)(void), const struct Struct_Obj_Entry *obj __unused)
+_start(char **ap,
+	void (*cleanup)(void),			/* from shared loader */
+	struct Struct_Obj_Entry *obj,		/* from shared loader */
+	struct ps_strings *ps_strings)
 {
+	int argc;
+	char **argv;
 	char **env;
-	const char *s;
 
-	env = argv + argc + 1;
+	argc = * (long *) ap;
+	argv = ap + 1;
+	env  = ap + 2 + argc;
 	environ = env;
-
-	if (argc > 0 && argv[0] != NULL) {
+	if(argc > 0 && argv[0] != NULL) {
+		const char *s;
 		__progname = argv[0];
 		for (s = __progname; *s != '\0'; s++)
 			if (*s == '/')
 				__progname = s + 1;
 	}
 
-	if (ps_strings != (struct ps_strings *)0)
-		__ps_strings = ps_strings;
-
+#ifndef NOSHARED
 	if (&_DYNAMIC != NULL)
 		atexit(cleanup);
-	else
-		_init_tls();
-
+#endif
 #ifdef GCRT
 	atexit(_mcleanup);
 #endif
@@ -143,7 +103,9 @@
 #ifdef GCRT
 	monstartup(&eprol, &etext);
 #endif
+#ifndef NOGPREL
 	_init();
+#endif
 	exit( main(argc, argv, env) );
 }
 
@@ -152,5 +114,3 @@
 __asm__("eprol:");
 __asm__(".previous");
 #endif
-
-__asm__(".ident\t\"$FreeBSD: src/lib/csu/arm/crt1.c,v 1.3 2004/09/23 23:00:51 cognet Exp $\"");