nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h

   1 /* Cancellable system call stubs.  Linux/PowerPC64 version.
   2    Copyright (C) 2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <sysdep.h>
  22 #include <tls.h>
  23 #ifndef __ASSEMBLER__
  24 # include <nptl/pthreadP.h>
  25 #endif
  26
  27 #if !defined NOT_IN_libc || defined IS_IN_libpthread
  28
  29 # undef PSEUDO
  30 # define PSEUDO(name, syscall_name, args)                               \
  31   .section ".text";                                                     \
  32   ENTRY (name)                                                          \
  33     SINGLE_THREAD_P;                                                    \
  34     bne- .Lpseudo_cancel;                                               \
  35     DO_CALL (SYS_ify (syscall_name));                                   \
  36     PSEUDO_RET;                                                         \
  37   .Lpseudo_cancel:                                                      \
  38     stdu 1,-128(1);                                                     \
  39     mflr 9;                                                             \
  40     std  9,128+16(1);                                                   \
  41     DOCARGS_##args;     /* save syscall args around CENABLE.  */        \
  42     CENABLE;                                                            \
  43     std  3,72(1);       /* store CENABLE return value (MASK).  */       \
  44     UNDOCARGS_##args;   /* restore syscall args.  */                    \
  45     DO_CALL (SYS_ify (syscall_name));                                   \
  46     mfcr 0;             /* save CR/R3 around CDISABLE.  */              \
  47     std  3,64(1);                                                               \
  48     std  0,8(1);                                                        \
  49     ld   3,72(1);       /* pass MASK to CDISABLE.  */                   \
  50     CDISABLE;                                                           \
  51     ld   9,128+16(1);                                                   \
  52     ld   0,8(1);        /* restore CR/R3. */                            \
  53     ld   3,64(1);                                                               \
  54     mtlr 9;                                                             \
  55     mtcr 0;                                                             \
  56     addi 1,1,128;
  57
  58 # define DOCARGS_0
  59 # define UNDOCARGS_0
  60
  61 # define DOCARGS_1      std 3,80(1); DOCARGS_0
  62 # define UNDOCARGS_1    ld 3,80(1); UNDOCARGS_0
  63
  64 # define DOCARGS_2      std 4,88(1); DOCARGS_1
  65 # define UNDOCARGS_2    ld 4,88(1); UNDOCARGS_1
  66
  67 # define DOCARGS_3      std 5,96(1); DOCARGS_2
  68 # define UNDOCARGS_3    ld 5,96(1); UNDOCARGS_2
  69
  70 # define DOCARGS_4      std 6,104(1); DOCARGS_3
  71 # define UNDOCARGS_4    ld 6,104(1); UNDOCARGS_3
  72
  73 # define DOCARGS_5      std 7,112(1); DOCARGS_4
  74 # define UNDOCARGS_5    ld 7,112(1); UNDOCARGS_4
  75
  76 # define DOCARGS_6      std 8,120(1); DOCARGS_5
  77 # define UNDOCARGS_6    ld 8,120(1); UNDOCARGS_5
  78
  79 # ifdef IS_IN_libpthread
  80 #  define CENABLE       bl JUMPTARGET(__pthread_enable_asynccancel)
  81 #  define CDISABLE      bl JUMPTARGET(__pthread_disable_asynccancel)
  82 # else
  83 #  define CENABLE       bl JUMPTARGET(__libc_enable_asynccancel)
  84 #  define CDISABLE      bl JUMPTARGET(__libc_disable_asynccancel)
  85 # endif
  86
  87 # ifndef __ASSEMBLER__
  88 #  define SINGLE_THREAD_P                                               \
  89   __builtin_expect (THREAD_GETMEM (THREAD_SELF, multiple_threads) \
  90                     == 0, 1)
  91 # else
  92 #   define SINGLE_THREAD_P                                              \
  93   lwz   10,MULTIPLE_THREADS_OFFSET(13);                         \
  94   cmpdi 10,0
  95 # endif
  96
  97 #elif !defined __ASSEMBLER__
  98
  99 /* This code should never be used but we define it anyhow.  */
 100 # define SINGLE_THREAD_P (1)
 101
 102 #endif