Update copyright dates with scripts/update-copyrights.

[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / m68k / clone.S

diff --git a/sysdeps/unix/sysv/linux/m68k/clone.S b/sysdeps/unix/sysv/linux/m68k/clone.S
index d553ab78c6431722fe494c7bba924b9122e42dd2..b68a3bd9360f3c83618a0e501946dbc7b17de90b 100644 (file)
--- a/sysdeps/unix/sysv/linux/m68k/clone.S
+++ b/sysdeps/unix/sysv/linux/m68k/clone.S
@@ -1,29 +1,34 @@
-/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
    Contributed by Andreas Schwab (schwab@issan.informatik.uni-dortmund.de)
 
    The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
 
    The GNU C Library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   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/>.  */
 
-/* clone is even more special than fork as it mucks with stacks
+/* clone() is even more special than fork() as it mucks with stacks
    and invokes a function in the right context after its all over.  */
 
 #include <sysdep.h>
 #define _ERRNO_H       1
 #include <bits/errno.h>
+#include <tls.h>
 
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+#define CLONE_VM      0x00000100
+#define CLONE_THREAD  0x00010000
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+            void *parent_tidptr, void *tls, void *child_tidptr) */
 
         .text
 ENTRY (__clone)
@@ -32,33 +37,94 @@ ENTRY (__clone)
        movel   #-EINVAL, %d0
        movel   4(%sp), %a0             /* no NULL function pointers */
        tstl    %a0
-       jeq     syscall_error
+       jeq     SYSCALL_ERROR_LABEL
        movel   8(%sp), %a1             /* no NULL stack pointers */
        tstl    %a1
-       jeq     syscall_error
+       jeq     SYSCALL_ERROR_LABEL
 
        /* Allocate space and copy the argument onto the new stack.  */
        movel   16(%sp), -(%a1)
 
        /* Do the system call */
+       movel   12+0(%sp), %d1          /* get flags */
+       movel   %d3, -(%a1)             /* save %d3 and get parent_tidptr */
+       movel   %d3, -(%sp)
+       cfi_adjust_cfa_offset (4)
+       cfi_rel_offset (%d3, 0)
+       movel   20+4(%sp), %d3
+       movel   %d4, -(%a1)             /* save %d4 and get child_tidptr */
+       movel   %d4, -(%sp)
+       cfi_adjust_cfa_offset (4)
+       cfi_rel_offset (%d4, 0)
+       movel   28+8(%sp), %d4
+       movel   %d5, -(%a1)             /* save %d5 and get tls */
+       movel   %d5, -(%sp)
+       cfi_adjust_cfa_offset (4)
+       cfi_rel_offset (%d5, 0)
+       movel   24+12(%sp), %d5
+       /* save %d2 and get stack pointer */
+#ifdef __mcoldfire__
+       movel   %d2, -(%a1)
+       movel   %d2, -(%sp)
+       cfi_adjust_cfa_offset (4)
+       cfi_rel_offset (%d2, 0)
+       movel   %a1, %d2
+#else
        exg     %d2, %a1                /* save %d2 and get stack pointer */
-       movel   12(%sp), %d1            /* get flags */
+       cfi_register (%d2, %a1)
+#endif
        movel   #SYS_ify (clone), %d0
+
+       /* End FDE now, because in the child the unwind info will be
+          wrong.  */
+       cfi_endproc
+
        trap    #0
+#ifdef __mcoldfire__
+       movel   (%sp)+, %d2
+#else
        exg     %d2, %a1                /* restore %d2 */
+#endif
+       movel   (%sp)+, %d5             /* restore %d5, %d4 and %d3 */
+       movel   (%sp)+, %d4
+       movel   (%sp)+, %d3
 
        tstl    %d0
-       jmi     syscall_error
+       jmi     SYSCALL_ERROR_LABEL
        jeq     thread_start
 
        rts
 
 thread_start:
+       cfi_startproc
+       cfi_undefined (pc)      /* Mark end of stack */
        subl    %fp, %fp        /* terminate the stack frame */
-       jsr     (%a0)
+       /* Check and see if we need to reset the PID.  */
+       movel   %d1, %a1
+       andl    #CLONE_THREAD, %d1
+       jne     donepid
+       movel   %a1, %d1
+       movel   #-1, %d0
+       andl    #CLONE_VM, %d1
+       jne     gotpid
+       movel   #SYS_ify (getpid), %d0
+       trap    #0
+gotpid:
+       movel   %a0, -(%sp)
        movel   %d0, -(%sp)
-       jbsr    JUMPTARGET (_exit)
+       bsrl    __m68k_read_tp@PLTPC
+       movel   (%sp)+, %d0
+       movel   %d0, PID_OFFSET(%a0)
+       movel   %d0, TID_OFFSET(%a0)
+       movel   (%sp)+, %a0
+donepid:
+       jsr     (%a0)
+       movel   %d0, %d1
+       movel   #SYS_ify (exit), %d0
+       trap    #0
+       cfi_endproc
 
+       cfi_startproc
 PSEUDO_END (__clone)
 
 weak_alias (__clone, clone)