Libc-763.13.tar.gz

[apple/libc.git] / sys / crt_externs.c

diff --git a/sys/crt_externs.c b/sys/crt_externs.c
index 5367740d57aefaf8c34c4b18502d21f4e284d9bb..b739e4089bba5ef9934da9ba9febc69890556c89 100644 (file)
--- a/sys/crt_externs.c
+++ b/sys/crt_externs.c
@@ -29,37 +29,15 @@
 
 #if defined(__DYNAMIC__)
 #include "mach-o/dyld.h" /* defines _dyld_lookup_and_bind() */
 
 #if defined(__DYNAMIC__)
 #include "mach-o/dyld.h" /* defines _dyld_lookup_and_bind() */

-#define STRINGIFY(a) # a

 #define DECLARE_VAR(var, type)                                 \
         static type * var ## _pointer = 0
 #define DECLARE_PROGNAME(var, type)                            \
         static type * var ## _pointer = 0;                     \
         static type _priv_ ## var = 0
 #define DECLARE_VAR(var, type)                                 \
         static type * var ## _pointer = 0
 #define DECLARE_PROGNAME(var, type)                            \
         static type * var ## _pointer = 0;                     \
         static type _priv_ ## var = 0

-#define SETUP_VAR(var)                                         \
-    if ( var ## _pointer == 0) {                               \
-        _dyld_lookup_and_bind( STRINGIFY(_ ## var),            \
-                (unsigned long *) & var ## _pointer, 0);       \
-    }
-#define SETUP_PROGNAME(var)                                    \
-    if ( var ## _pointer == 0) {                               \
-       if(NSIsSymbolNameDefined( STRINGIFY(_ ## var) ))        \
-           _dyld_lookup_and_bind( STRINGIFY(_ ## var),         \
-                (unsigned long *) & var ## _pointer, 0);       \
-       else {                                                  \
-           char *progname = _dyld_get_image_name(0);           \
-           if(_priv_ ## var = strrchr(progname, '/'))          \
-               _priv_ ## var ++;                               \
-           else                                                \
-               _priv_ ## var = progname;                       \
-           var ## _pointer = & _priv_ ## var;                  \
-       }                                                       \
-    }

 #define USE_VAR(var) (var ## _pointer)
 #else
 #define DECLARE_VAR(var, type) extern type var
 #define DECLARE_PROGNAME(var, type) DECLARE_VAR(var, type)
 #define USE_VAR(var) (var ## _pointer)
 #else
 #define DECLARE_VAR(var, type) extern type var
 #define DECLARE_PROGNAME(var, type) DECLARE_VAR(var, type)

-#define SETUP_VAR(var)
-#define SETUP_PROGNAME(var) SETUP_VAR(var)

 #define USE_VAR(var) (& var)
 #endif
 
 #define USE_VAR(var) (& var)
 #endif
 


@@ -70,27 +48,22 @@ DECLARE_VAR(_mh_execute_header, struct mach_header);
 DECLARE_PROGNAME(__progname, char *);
 
 char ***_NSGetArgv(void) {
 DECLARE_PROGNAME(__progname, char *);
 
 char ***_NSGetArgv(void) {

-    SETUP_VAR(NXArgv);

     return(USE_VAR(NXArgv));
 }
 
 int *_NSGetArgc(void) {
     return(USE_VAR(NXArgv));
 }
 
 int *_NSGetArgc(void) {

-    SETUP_VAR(NXArgc);

     return(USE_VAR(NXArgc));
 }
 
 char ***_NSGetEnviron(void) {
     return(USE_VAR(NXArgc));
 }
 
 char ***_NSGetEnviron(void) {

-    SETUP_VAR(environ);

     return(USE_VAR(environ));
 }
 
 char **_NSGetProgname(void) {
     return(USE_VAR(environ));
 }
 
 char **_NSGetProgname(void) {

-    SETUP_PROGNAME(__progname);

     return(USE_VAR(__progname));
 }
 
 struct mach_header *_NSGetMachExecuteHeader(void) {
     return(USE_VAR(__progname));
 }
 
 struct mach_header *_NSGetMachExecuteHeader(void) {

-    SETUP_VAR(_mh_execute_header);

     return(USE_VAR(_mh_execute_header));
 }
 
     return(USE_VAR(_mh_execute_header));
 }
 


@@ -104,6 +77,10 @@ struct ProgramVars
     char**     __prognamePtr;
 };
 
     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
 /*
  * 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


@@ -111,10 +88,12 @@ struct ProgramVars
  */
 void __attribute__((visibility("hidden")))
 _program_vars_init(const struct ProgramVars* vars) {
  */
 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;
     // 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;
     NXArgv_pointer             = vars->NXArgvPtr;
     NXArgc_pointer             = vars->NXArgcPtr;
     environ_pointer            = vars->environPtr;


@@ -122,6 +101,7 @@ _program_vars_init(const struct ProgramVars* vars) {
     _mh_execute_header_pointer = vars->mh;
 }
 
     _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
 /*
  * 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


@@ -134,8 +114,10 @@ void _NSSetProgramVars(int* crt_argc, char*** crt_argv, char*** crt_environ, str
     __progname_pointer         = crt_progname;
     _mh_execute_header_pointer = crt_mh;
 }
     __progname_pointer         = crt_progname;
     _mh_execute_header_pointer = crt_mh;
 }

-#endif
+#endif 
+#endif /* __DYNAMIC__ */

 
 

+#if __ppc__

 /*
  * Fix for Radar bug 2200596 --
  * EH symbol definitions for gcc 2.7.2.x implementation of
 /*
  * Fix for Radar bug 2200596 --
  * EH symbol definitions for gcc 2.7.2.x implementation of


@@ -165,3 +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;
 
 /* This is what egcs uses for its global data pointer */
 void *__eh_global_dataptr = (void *)0;

+#endif /* __ppc__ */
+