PERFORCE change 108362 for review

[Oleksandr Tymoshenko]

http://perforce.freebsd.org/chv.cgi?CH=108362

Change 108362 by gonzo at gonzo_hq on 2006/10/24 22:33:25

	o Set argc & argv for __start function.
	o Get env and environ variables from argc & argv values.

Affected files ...

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

Differences ...

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

@@ -51,6 +51,7 @@
 #include "crtbrand.c"
 #include <machine/asm.h>
 
+typedef void (*fptr)(void);
 struct Struct_Obj_Entry;
 struct ps_strings;
 
@@ -72,24 +73,34 @@
 
 char **environ;
 const char *__progname = "";
-struct ps_strings *__ps_strings;
 
 /* The entry function. */
 __asm("	.text			\n"
 "	.align	8		\n"
 "	.globl	_start		\n"
 "	_start:			\n"
-"	/* TODO: Get argc, argv, and envp from stack */	\n"
+"	/* Get argc, argv from stack */	\n"
+"				\n"
+"	/* lw	a0, -32(sp)   */\n"
+"	/* move	a1, sp        */\n"
+"	/* addu	a1, 32 + 4    */\n"
+"				\n"
+"	lw	$4, -32($29)	\n"
+"	move	$5, $29		\n"
+"	addu	$5, 36		\n"
 "	/* TODO: Ensure the stack is properly aligned before calling C code. */\n"
 "\n"
 "	j	 __start  ");
 /* ARGSUSED */
 void
-__start(int argc, char **argv, char **env, struct ps_strings *ps_strings,
-    const struct Struct_Obj_Entry *obj __unused, void (*cleanup)(void))
+__start(int argc, char **argv)
 {
+	char **env;
 	const char *s;
+	/* XXXMIPS: proper set a cleanup procedure */
+	fptr cleanup = NULL;
 
+	env = argv + argc + 1;
 	environ = env;
 
 	if (argc > 0 && argv[0] != NULL) {
@@ -99,9 +110,6 @@
 				__progname = s + 1;
 	}
 
-	if (ps_strings != (struct ps_strings *)0)
-		__ps_strings = ps_strings;
-
 	if (&_DYNAMIC != NULL)
 		atexit(cleanup);
 	else