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 a179f8e0fab1cbcb884f5c5eb8ff077618970ede..b68a3bd9360f3c83618a0e501946dbc7b17de90b 100644 (file)
--- a/sysdeps/unix/sysv/linux/m68k/clone.S
+++ b/sysdeps/unix/sysv/linux/m68k/clone.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996,97,98,2002 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)
 
@@ -13,18 +13,22 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   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)
@@ -42,21 +46,48 @@ ENTRY (__clone)
        movel   16(%sp), -(%a1)
 
        /* Do the system call */
-       movel   12(%sp), %d1            /* get flags */
+       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 */
+       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_LABEL
@@ -65,12 +96,35 @@ ENTRY (__clone)
        rts
 
 thread_start:
+       cfi_startproc
+       cfi_undefined (pc)      /* Mark end of stack */
        subl    %fp, %fp        /* terminate the stack frame */
+       /* 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)
+       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)