linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h

   1 /* Copyright (C) 2003, 2005 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sysdep.h>
  21 #include <tls.h>
  22 #ifndef __ASSEMBLER__
  23 # include <linuxthreads/internals.h>
  24 #endif
  25
  26 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  27
  28 # undef PSEUDO
  29 # define PSEUDO(name, syscall_name, args)                               \
  30   .section ".text";                                                     \
  31   ENTRY (name)                                                          \
  32     SINGLE_THREAD_P;                                                    \
  33     bne- .Lpseudo_cancel;                                               \
  34     DO_CALL (SYS_ify (syscall_name));                                   \
  35     PSEUDO_RET;                                                         \
  36   .Lpseudo_cancel:                                                      \
  37     stwu 1,-48(1);                                                      \
  38     mflr 9;                                                             \
  39     stw 9,52(1);                                                        \
  40     DOCARGS_##args;     /* save syscall args around CENABLE.  */        \
  41     CENABLE;                                                            \
  42     stw 3,16(1);        /* store CENABLE return value (MASK).  */       \
  43     UNDOCARGS_##args;   /* restore syscall args.  */                    \
  44     DO_CALL (SYS_ify (syscall_name));                                   \
  45     mfcr 0;             /* save CR/R3 around CDISABLE.  */              \
  46     stw 3,8(1);                                                         \
  47     stw 0,12(1);                                                        \
  48     lwz 3,16(1);        /* pass MASK to CDISABLE.  */                   \
  49     CDISABLE;                                                           \
  50     lwz 4,52(1);                                                        \
  51     lwz 0,12(1);        /* restore CR/R3. */                            \
  52     lwz 3,8(1);                                                         \
  53     mtlr 4;                                                             \
  54     mtcr 0;                                                             \
  55     addi 1,1,48;
  56
  57 # define DOCARGS_0
  58 # define UNDOCARGS_0
  59
  60 # define DOCARGS_1      stw 3,20(1); DOCARGS_0
  61 # define UNDOCARGS_1    lwz 3,20(1); UNDOCARGS_0
  62
  63 # define DOCARGS_2      stw 4,24(1); DOCARGS_1
  64 # define UNDOCARGS_2    lwz 4,24(1); UNDOCARGS_1
  65
  66 # define DOCARGS_3      stw 5,28(1); DOCARGS_2
  67 # define UNDOCARGS_3    lwz 5,28(1); UNDOCARGS_2
  68
  69 # define DOCARGS_4      stw 6,32(1); DOCARGS_3
  70 # define UNDOCARGS_4    lwz 6,32(1); UNDOCARGS_3
  71
  72 # define DOCARGS_5      stw 7,36(1); DOCARGS_4
  73 # define UNDOCARGS_5    lwz 7,36(1); UNDOCARGS_4
  74
  75 # define DOCARGS_6      stw 8,40(1); DOCARGS_5
  76 # define UNDOCARGS_6    lwz 8,40(1); UNDOCARGS_5
  77
  78 # ifdef IS_IN_libpthread
  79 #  define CENABLE       bl __pthread_enable_asynccancel@local
  80 #  define CDISABLE      bl __pthread_disable_asynccancel@local
  81 # elif !defined NOT_IN_libc
  82 #  define CENABLE       bl __libc_enable_asynccancel@local
  83 #  define CDISABLE      bl __libc_disable_asynccancel@local
  84 # else
  85 #  define CENABLE       bl JUMPTARGET(__librt_enable_asynccancel)
  86 #  define CDISABLE      bl JUMPTARGET(__librt_disable_asynccancel)
  87 # endif
  88
  89 # ifdef HAVE_TLS_SUPPORT
  90 #  ifndef __ASSEMBLER__
  91 #   define SINGLE_THREAD_P                                              \
  92   __builtin_expect (THREAD_GETMEM (THREAD_SELF, p_multiple_threads) == 0, 1)
  93 #  else
  94 #   define SINGLE_THREAD_P                                              \
  95   lwz 10,MULTIPLE_THREADS_OFFSET(2);                                    \
  96   cmpwi 10,0
  97 #  endif
  98 # else
  99 #  if !defined NOT_IN_libc
 100 #   define __local_multiple_threads __libc_multiple_threads
 101 #  else
 102 #   define __local_multiple_threads __librt_multiple_threads
 103 #  endif
 104 #  ifndef __ASSEMBLER__
 105 extern int __local_multiple_threads attribute_hidden;
 106 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
 107 #  else
 108 #   if !defined PIC
 109 #    define SINGLE_THREAD_P                                             \
 110   lis 10,__local_multiple_threads@ha;                                   \
 111   lwz 10,__local_multiple_threads@l(10);                                \
 112   cmpwi 10,0
 113 #   else
 114 #    define SINGLE_THREAD_P                                             \
 115   mflr 9;                                                               \
 116   bl _GLOBAL_OFFSET_TABLE_@local-4;                                     \
 117   mflr 10;                                                              \
 118   mtlr 9;                                                               \
 119   lwz 10,__local_multiple_threads@got(10);                              \
 120   lwz 10,0(10);                                                         \
 121   cmpwi 10,0
 122 #   endif
 123 #  endif
 124 # endif
 125
 126 #elif !defined __ASSEMBLER__
 127
 128 /* This code should never be used but we define it anyhow.  */
 129 # define SINGLE_THREAD_P (1)
 130
 131 #endif