X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/5b2abdfbf4211b6592cdd02b9507555a0ecbb04b..6465356a983ac139f81d3b7913cdb548477c346c:/sys/crt_externs.c

diff --git a/sys/crt_externs.c b/sys/crt_externs.c
index 41c6c3c..b739e40 100644
--- a/sys/crt_externs.c
+++ b/sys/crt_externs.c
@@ -1,21 +1,22 @@
 /*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -28,51 +29,95 @@
 
 #if defined(__DYNAMIC__)
 #include "mach-o/dyld.h" /* defines _dyld_lookup_and_bind() */
-#define STRINGIFY(a) # a
-#define DECLARE_VAR(var, type)	\
+#define DECLARE_VAR(var, type)					\
         static type * var ## _pointer = 0
-#define SETUP_VAR(var)						\
-    if ( var ## _pointer == 0) {				\
-        _dyld_lookup_and_bind( STRINGIFY(_ ## var),		\
-                (unsigned long *) & var ## _pointer, 0);	\
-    }
+#define DECLARE_PROGNAME(var, type)				\
+        static type * var ## _pointer = 0;			\
+        static type _priv_ ## var = 0
 #define USE_VAR(var) (var ## _pointer)
 #else
 #define DECLARE_VAR(var, type) extern type var
-#define SETUP_VAR(var)
+#define DECLARE_PROGNAME(var, type) DECLARE_VAR(var, type)
 #define USE_VAR(var) (& var)
 #endif
 
+DECLARE_VAR(NXArgv, char **);
+DECLARE_VAR(NXArgc, int);
+DECLARE_VAR(environ, char **);
+DECLARE_VAR(_mh_execute_header, struct mach_header);
+DECLARE_PROGNAME(__progname, char *);
+
 char ***_NSGetArgv(void) {
-    DECLARE_VAR(NXArgv, char **);
-    SETUP_VAR(NXArgv);
     return(USE_VAR(NXArgv));
 }
 
 int *_NSGetArgc(void) {
-    DECLARE_VAR(NXArgc, int);
-    SETUP_VAR(NXArgc);
     return(USE_VAR(NXArgc));
 }
 
 char ***_NSGetEnviron(void) {
-    DECLARE_VAR(environ, char **);
-    SETUP_VAR(environ);
     return(USE_VAR(environ));
 }
 
 char **_NSGetProgname(void) {
-    DECLARE_VAR(__progname, char *);
-    SETUP_VAR(__progname);
     return(USE_VAR(__progname));
 }
 
 struct mach_header *_NSGetMachExecuteHeader(void) {
-    DECLARE_VAR(_mh_execute_header, struct mach_header);
-    SETUP_VAR(_mh_execute_header);
     return(USE_VAR(_mh_execute_header));
 }
 
+#if __DYNAMIC__
+struct ProgramVars
+{
+    void*	mh;
+    int*	NXArgcPtr;
+    char***	NXArgvPtr;
+    char***	environPtr;
+    char**	__prognamePtr;
+};
+
+
+#define SUPPORT_PRE_GM_10_5_EXECUTABLES (__ppc__ || __i386__)
+
+
+/*
+ * dyld calls libSystem_initializer() and passes it a ProgramVars struct containing pointers to the
+ * main executable's NXArg* global variables. libSystem_initializer() calls __libc_init() which calls
+ * _program_vars_init() passing the ProgramVars parameter.
+ */
+void __attribute__((visibility("hidden")))
+_program_vars_init(const struct ProgramVars* vars) {
+#if SUPPORT_PRE_GM_10_5_EXECUTABLES
+    // to support transitional 10.5 main executables that don't have extended __dyld section and instead call _NSSetProgramVars,  
+    // don't overwrite values set by _NSSetProgramVars() 
+    if ( NXArgv_pointer != NULL )
+	return;
+#endif
+    NXArgv_pointer		= vars->NXArgvPtr;
+    NXArgc_pointer		= vars->NXArgcPtr;
+    environ_pointer		= vars->environPtr;
+    __progname_pointer		= vars->__prognamePtr;
+    _mh_execute_header_pointer	= vars->mh;
+}
+
+#if SUPPORT_PRE_GM_10_5_EXECUTABLES
+/*
+ * This is only called by main executables built with pre 10-5 GM crt1.10.5.o.  In those programs, 
+ * there is no extended __dyld section, dyld cannot tell _program_vars_init() where the real program
+ * variables are, so they get temp values and are set for real here.
+ */
+void _NSSetProgramVars(int* crt_argc, char*** crt_argv, char*** crt_environ, struct mach_header* crt_mh, char** crt_progname) {
+    NXArgv_pointer		= crt_argv;
+    NXArgc_pointer		= crt_argc;
+    environ_pointer		= crt_environ;
+    __progname_pointer		= crt_progname;
+    _mh_execute_header_pointer	= crt_mh;
+}
+#endif 
+#endif /* __DYNAMIC__ */
+
+#if __ppc__
 /*
  * Fix for Radar bug 2200596 --
  * EH symbol definitions for gcc 2.7.2.x implementation of
@@ -102,5 +147,5 @@ void *__eh_value_gcc_272 = (void *)0;
 
 /* This is what egcs uses for its global data pointer */
 void *__eh_global_dataptr = (void *)0;
+#endif /* __ppc__ */
 
-void *__keymgr_global[3] = { (void *)0 };