[COMMITTED] PLT avoidance for _exit in rtld.
Commit Message
This saves 24 bytes of code on i686-linux-gnu, where calls the compiler
thinks will use the PLT (but actually won't at link time) require setting
up %ebx. It has no effect at all on x86_64-linux-gnu (and probably most or
all other machines).
Thanks,
Roland
2015-07-09 Roland McGrath <roland@hack.frob.com>
* include/unistd.h: Add rtld_hidden_proto for _exit.
* posix/_exit.c: Add rtld_hidden_def.
* sysdeps/mach/hurd/_exit.c: Likewise.
* sysdeps/nacl/_exit.c: Likewise.
* sysdeps/unix/sysv/linux/_exit.c: Likewise.
* sysdeps/unix/sysv/linux/i386/_exit.S: Likewise.
@@ -5,6 +5,7 @@
__BEGIN_DECLS
libc_hidden_proto (_exit, __noreturn__)
+rtld_hidden_proto (_exit, __noreturn__)
libc_hidden_proto (alarm)
libc_hidden_proto (confstr)
libc_hidden_proto (execl)
@@ -29,6 +29,7 @@ _exit (status)
abort ();
}
libc_hidden_def (_exit)
+rtld_hidden_def (_exit)
weak_alias (_exit, _Exit)
stub_warning (_exit)
@@ -52,4 +52,5 @@ _exit (status)
_hurd_exit (W_EXITCODE (status, 0));
}
libc_hidden_def (_exit)
+rtld_hidden_def (_exit)
weak_alias (_exit, _Exit)
@@ -31,4 +31,5 @@ _exit (int status)
__builtin_trap ();
}
libc_hidden_def (_exit)
+rtld_hidden_def (_exit)
weak_alias (_exit, _Exit)
@@ -39,4 +39,5 @@ _exit (status)
}
}
libc_hidden_def (_exit)
+rtld_hidden_def (_exit)
weak_alias (_exit, _Exit)
@@ -40,4 +40,5 @@ _exit:
.size _exit,.-_exit
libc_hidden_def (_exit)
+rtld_hidden_def (_exit)
weak_alias (_exit, _Exit)