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[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / i386 / clone.S

diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S
index dbd65d8da6ff6a14d91dd0f68d0bcf2993b1745c..9d47a3c5161271bb45b407d62cf24832f41332d7 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/clone.S
+++ b/sysdeps/unix/sysv/linux/i386/clone.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2013 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Richard Henderson (rth@tamu.edu)
 
@@ -14,7 +14,7 @@
 
    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
+   <https://www.gnu.org/licenses/>.  */
 
 /* clone() is even more special than fork() as it mucks with stacks
    and invokes a function in the right context after its all over.  */
@@ -39,27 +39,16 @@
 #define __NR_clone 120
 #define SYS_clone 120
 
-#define CLONE_VM       0x00000100
-#define CLONE_THREAD   0x00010000
-
         .text
 ENTRY (__clone)
        /* Sanity check arguments.  */
        movl    $-EINVAL,%eax
        movl    FUNC(%esp),%ecx         /* no NULL function pointers */
-#ifdef PIC
-       jecxz   SYSCALL_ERROR_LABEL
-#else
        testl   %ecx,%ecx
        jz      SYSCALL_ERROR_LABEL
-#endif
        movl    STACK(%esp),%ecx        /* no NULL stack pointers */
-#ifdef PIC
-       jecxz   SYSCALL_ERROR_LABEL
-#else
        testl   %ecx,%ecx
        jz      SYSCALL_ERROR_LABEL
-#endif
 
        /* Insert the argument onto the new stack.  Make sure the new
           thread is started with an alignment of (mod 16).  */
@@ -74,9 +63,6 @@ ENTRY (__clone)
        movl    %eax,8(%ecx)
        /* Don't leak any information.  */
        movl    $0,4(%ecx)
-#ifndef RESET_PID
-       movl    $0,(%ecx)
-#endif
 
        /* Do the system call */
        pushl   %ebx
@@ -95,10 +81,8 @@ ENTRY (__clone)
        cfi_rel_offset (edi, 0)
        movl    $SYS_ify(clone),%eax
 
-#ifdef RESET_PID
        /* Remember the flag value.  */
        movl    %ebx, (%ecx)
-#endif
 
        /* End FDE now, because in the child the unwind info will be
           wrong.  */
@@ -121,11 +105,6 @@ L(thread_start):
        cfi_undefined (eip);
        /* Note: %esi is zero.  */
        movl    %esi,%ebp       /* terminate the stack frame */
-#ifdef RESET_PID
-       testl   $CLONE_THREAD, %edi
-       je      L(newpid)
-L(haspid):
-#endif
        call    *%ebx
 #ifdef PIC
        call    L(here)
@@ -137,23 +116,7 @@ L(here):
        movl    $SYS_ify(exit), %eax
        ENTER_KERNEL
 
-#ifdef RESET_PID
-       .subsection 2
-L(newpid):
-       testl   $CLONE_VM, %edi
-       movl    $-1, %eax
-       jne     L(nomoregetpid)
-       movl    $SYS_ify(getpid), %eax
-       ENTER_KERNEL
-L(nomoregetpid):
-       movl    %eax, %gs:PID
-       movl    %eax, %gs:TID
-       jmp     L(haspid)
-       .previous
-#endif
-       cfi_endproc;
-
-       cfi_startproc
 PSEUDO_END (__clone)
 
+libc_hidden_def (__clone)
 weak_alias (__clone, clone)