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[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / sparc / sparc64 / clone.S

diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S
index a8e317e509779eb535c04c4862af1ecdbc7e511b..f6122e5108a6baed8145e11fb6d46e1f8cd960fc 100644 (file)
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S
@@ -1,87 +1,86 @@
-/* Copyright (C) 1997, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
    Contributed by Richard Henderson (rth@tamu.edu).
 
    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
+   <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.  */
 
 #include <asm/errno.h>
 #include <asm/unistd.h>
+#include <tcb-offsets.h>
+#include <sysdep.h>
 
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+            pid_t *ptid, void *tls, pid_t *ctid); */
+
+       .register       %g2,#scratch
+       .register       %g3,#scratch
 
        .text
-       .align  4
-       .globl  __clone
-       .type   __clone,@function
 
-__clone:
+ENTRY (__clone)
        save    %sp, -192, %sp
+       cfi_def_cfa_register(%fp)
+       cfi_window_save
+       cfi_register(%o7, %i7)
 
        /* sanity check arguments */
-       brz,pn  %i0, 99f
-        mov    %i0, %l0                /* save fn */
-       brz,pn  %i1, 99f
-        mov    %i3, %l3                /* save arg */
+       brz,pn  %i0, 99f                /* fn non-NULL? */
+        mov    %i0, %g2
+       brz,pn  %i1, 99f                /* child_stack non-NULL? */
+        mov    %i2, %o0                /* clone flags */
+
+       /* The child_stack is the top of the stack, allocate one
+          whole stack frame from that as this is what the kernel
+          expects.  Also, subtract STACK_BIAS.  */
+       sub     %i1, 192 + 0x7ff, %o1
+       mov     %i3, %g3
+
+       mov     %i4,%o2                 /* PTID */
+       mov     %i5,%o3                 /* TLS */
+       ldx     [%fp+0x7ff+176],%o4     /* CTID */
 
        /* Do the system call */
-       mov     %i1, %o1
-       mov     %i2, %o0
        set     __NR_clone, %g1
        ta      0x6d
-       bcs,pn  %xcc, 99f
+       bcs,pn  %xcc, 98f
         nop
        brnz,pn %o1, __thread_start
-        mov    %o0, %i0
-       ret
-        restore
-99:
-#ifndef _LIBC_REENTRANT
-#ifdef PIC
-       call    1f
-       sethi   %hi(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
-1:     or      %l7, %lo(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
-       add     %l7, %o7, %l7
-       set     EINVAL, %i0
-       sethi   %hi(errno), %g2
-       or      %g2, %lo(errno), %g2
-       st      %i0, [%l7+%g2]
-#else
-       sethi   %hi(errno), %g2
-       set     EINVAL, %i0
-       st      %i0, [%g2+%lo(errno)]
-#endif
-#else
-       call    __errno_location
         nop
+       jmpl    %i7 + 8, %g0
+        restore %o0, %g0, %o0
+99:    mov     EINVAL, %o0
+98:    call    HIDDEN_JUMPTARGET(__errno_location)
+        mov    %o0, %i0
        st      %i0, [%o0]
-#endif
-       ret
+       jmpl    %i7 + 8, %g0
         restore %g0,-1,%o0
-       .size __clone, .-__clone
+END(__clone)
 
        .type __thread_start,@function
 __thread_start:
        mov     %g0, %fp        /* terminate backtrace */
-       sub     %sp, 6*8, %sp   /* provide arg storage */
-       call    %l0
-        mov    %l3,%o0
-       call    _exit,0
+       call    %g2
+        mov    %g3,%o0
+       set     __NR_exit, %g1
+       ta      0x6d
         nop
-       .size __thread_start, .-__thread_start
 
-weak_alias(__clone, clone)
+       .size   __thread_start, .-__thread_start
+
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)