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

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <tls.h>
  21 #ifndef __ASSEMBLER__
  22 # include <linuxthreads/internals.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  26
  27 # undef PSEUDO
  28 # define PSEUDO(name, syscall_name, args)                               \
  29   .section ".text";                                                     \
  30   ENTRY (name)                                                          \
  31     SINGLE_THREAD_P;                                                    \
  32     bne- .Lpseudo_cancel;                                               \
  33     DO_CALL (SYS_ify (syscall_name));                                   \
  34     PSEUDO_RET;                                                         \
  35   .Lpseudo_cancel:                                                      \
  36     stdu 1,-128(1);                                                     \
  37     mflr 9;                                                             \
  38     std  9,128+16(1);                                                   \
  39     DOCARGS_##args;     /* save syscall args around CENABLE.  */        \
  40     CENABLE;                                                            \
  41     std  3,72(1);       /* store CENABLE return value (MASK).  */       \
  42     UNDOCARGS_##args;   /* restore syscall args.  */                    \
  43     DO_CALL (SYS_ify (syscall_name));                                   \
  44     mfcr 0;             /* save CR/R3 around CDISABLE.  */              \
  45     std  3,64(1);                                                               \
  46     std  0,8(1);                                                        \
  47     ld   3,72(1);       /* pass MASK to CDISABLE.  */                   \
  48     CDISABLE;                                                           \
  49     ld   9,128+16(1);                                                   \
  50     ld   0,8(1);        /* restore CR/R3. */                            \
  51     ld   3,64(1);                                                               \
  52     mtlr 9;                                                             \
  53     mtcr 0;                                                             \
  54     addi 1,1,128;
  55
  56 # define DOCARGS_0
  57 # define UNDOCARGS_0
  58
  59 # define DOCARGS_1      std 3,80(1); DOCARGS_0
  60 # define UNDOCARGS_1    ld 3,80(1); UNDOCARGS_0
  61
  62 # define DOCARGS_2      std 4,88(1); DOCARGS_1
  63 # define UNDOCARGS_2    ld 4,88(1); UNDOCARGS_1
  64
  65 # define DOCARGS_3      std 5,96(1); DOCARGS_2
  66 # define UNDOCARGS_3    ld 5,96(1); UNDOCARGS_2
  67
  68 # define DOCARGS_4      std 6,104(1); DOCARGS_3
  69 # define UNDOCARGS_4    ld 6,104(1); UNDOCARGS_3
  70
  71 # define DOCARGS_5      std 7,112(1); DOCARGS_4
  72 # define UNDOCARGS_5    ld 7,112(1); UNDOCARGS_4
  73
  74 # define DOCARGS_6      std 8,120(1); DOCARGS_5
  75 # define UNDOCARGS_6    ld 8,120(1); UNDOCARGS_5
  76
  77 # ifdef IS_IN_libpthread
  78 #  define CENABLE       bl JUMPTARGET(__pthread_enable_asynccancel)
  79 #  define CDISABLE      bl JUMPTARGET(__pthread_disable_asynccancel)
  80 #  define __local_multiple_threads __pthread_multiple_threads
  81 # elif !defined NOT_IN_libc
  82 #  define CENABLE       bl JUMPTARGET(__libc_enable_asynccancel)
  83 #  define CDISABLE      bl JUMPTARGET(__libc_disable_asynccancel)
  84 #  define __local_multiple_threads __libc_multiple_threads
  85 # else
  86 #  define CENABLE       bl JUMPTARGET(__librt_enable_asynccancel); nop
  87 #  define CDISABLE      bl JUMPTARGET(__librt_disable_asynccancel); nop
  88 #  define __local_multiple_threads __librt_multiple_threads
  89 # endif
  90
  91 # ifdef HAVE_TLS_SUPPORT
  92 #  ifndef __ASSEMBLER__
  93 #   define SINGLE_THREAD_P                                              \
  94   __builtin_expect (THREAD_GETMEM (THREAD_SELF, p_multiple_threads) == 0, 1)
  95 #  else
  96 #   define SINGLE_THREAD_P                                              \
  97   lwz 10,MULTIPLE_THREADS_OFFSET(13);                                   \
  98   cmpwi 10,0
  99 #  endif
 100 # else /* !HAVE_TLS_SUPPORT */
 101 #  ifndef __ASSEMBLER__
 102 extern int __local_multiple_threads
 103 #   if !defined NOT_IN_libc || defined IS_IN_libpthread
 104   attribute_hidden;
 105 #   else
 106   ;
 107 #   endif
 108 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
 109 #  else
 110 #   define SINGLE_THREAD_P                                              \
 111         .section        ".toc","aw";                                    \
 112 .LC__local_multiple_threads:;                                           \
 113         .tc __local_multiple_threads[TC],__local_multiple_threads;      \
 114   .previous;                                                            \
 115   ld    10,.LC__local_multiple_threads@toc(2);                          \
 116   lwz   10,0(10);                                                       \
 117   cmpwi 10,0
 118 #  endif
 119 # endif
 120
 121 #elif !defined __ASSEMBLER__
 122
 123 /* This code should never be used but we define it anyhow.  */
 124 # define SINGLE_THREAD_P (1)
 125
 126 #endif