diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/init-first.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/init-first.c | 54 |
1 files changed, 19 insertions, 35 deletions
diff --git a/sysdeps/unix/sysv/linux/init-first.c b/sysdeps/unix/sysv/linux/init-first.c index 267c01afc8..feff028a28 100644 --- a/sysdeps/unix/sysv/linux/init-first.c +++ b/sysdeps/unix/sysv/linux/init-first.c @@ -29,10 +29,12 @@ extern void __libc_global_ctors (void); /* The function is called from assembly stubs the compiler can't see. */ static void init (void *) __attribute__ ((unused)); -extern int __libc_is_static; -#ifdef PIC -weak_extern (__libc_is_static) -#endif +extern int _dl_starting_up; +weak_extern (_dl_starting_up) + +/* Set nonzero if we have to be prepared for more then one libc being + used in the process. Safe assumption if initializer never runs. */ +int __libc_multiple_libcs = 1; static void init (void *data) @@ -43,39 +45,21 @@ init (void *data) char **argv = (char **)data + 1; char **envp = &argv[argc + 1]; - /* XXX Another gcc bug. We marked the function as `unused' but it - is still optimized away. */ - volatile void *foo __attribute__ ((unused)) = &init; -#ifdef PIC - if (&__libc_is_static != NULL) -#endif + __libc_multiple_libcs = &_dl_starting_up && ! _dl_starting_up; + + /* We must not call `personality' twice. */ + if (!__libc_multiple_libcs) { -#ifdef PIC - /* We must not call `personality' twice. */ - if (__libc_is_static == 0) -#endif - { - /* The `personality' system call takes one argument that - chooses the "personality", i.e. the set of system calls - and such. We must make this call first thing to disable - emulation of some other system that might have been - enabled by default based on the executable format. */ - __personality (PER_LINUX); - - /* Set the FPU control word to the proper default value. */ - __setfpucw (__fpu_control); - } - - /* We set LIBC_IS_STATIC to a value > 0 for the static library - and < 0 for the shared library. This information might be - useful for the running program but it is mainly necessary for - the above `if' statement. */ -#ifdef PIC - __libc_is_static = -1; -#else - __libc_is_static = 1; -#endif + /* The `personality' system call takes one argument that chooses + the "personality", i.e. the set of system calls and such. We + must make this call first thing to disable emulation of some + other system that might have been enabled by default based on + the executable format. */ + __personality (PER_LINUX); + + /* Set the FPU control word to the proper default value. */ + __setfpucw (__fpu_control); } __environ = envp; |