l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libpthread/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, 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     stwu 1,-48(1);                                                      \
  37     mflr 9;                                                             \
  38     stw 9,52(1);                                                        \
  39     CGOTSETUP;                                                          \
  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     CGOTRESTORE;                                                        \
  54     mtlr 4;                                                             \
  55     mtcr 0;                                                             \
  56     addi 1,1,48;
  57
  58 # define DOCARGS_0
  59 # define UNDOCARGS_0
  60
  61 # define DOCARGS_1      stw 3,20(1); DOCARGS_0
  62 # define UNDOCARGS_1    lwz 3,20(1); UNDOCARGS_0
  63
  64 # define DOCARGS_2      stw 4,24(1); DOCARGS_1
  65 # define UNDOCARGS_2    lwz 4,24(1); UNDOCARGS_1
  66
  67 # define DOCARGS_3      stw 5,28(1); DOCARGS_2
  68 # define UNDOCARGS_3    lwz 5,28(1); UNDOCARGS_2
  69
  70 # define DOCARGS_4      stw 6,32(1); DOCARGS_3
  71 # define UNDOCARGS_4    lwz 6,32(1); UNDOCARGS_3
  72
  73 # define DOCARGS_5      stw 7,36(1); DOCARGS_4
  74 # define UNDOCARGS_5    lwz 7,36(1); UNDOCARGS_4
  75
  76 # define DOCARGS_6      stw 8,40(1); DOCARGS_5
  77 # define UNDOCARGS_6    lwz 8,40(1); UNDOCARGS_5
  78
  79 # define CGOTSETUP
  80 # define CGOTRESTORE
  81
  82 # ifdef IS_IN_libpthread
  83 #  define CENABLE       bl __pthread_enable_asynccancel@local
  84 #  define CDISABLE      bl __pthread_disable_asynccancel@local
  85 # elif !defined NOT_IN_libc
  86 #  define CENABLE       bl __libc_enable_asynccancel@local
  87 #  define CDISABLE      bl __libc_disable_asynccancel@local
  88 # else
  89 #  define CENABLE       bl JUMPTARGET(__librt_enable_asynccancel)
  90 #  define CDISABLE      bl JUMPTARGET(__librt_disable_asynccancel)
  91 #  if defined HAVE_AS_REL16 && defined __PIC__
  92 #   undef CGOTSETUP
  93 #   define CGOTSETUP                                                    \
  94     bcl 20,31,1f;                                                       \
  95  1: stw 30,44(1);                                                       \
  96     mflr 30;                                                            \
  97     addis 30,30,_GLOBAL_OFFSET_TABLE-1b@ha;                             \
  98     addi 30,30,_GLOBAL_OFFSET_TABLE-1b@l
  99 #   undef CGOTRESTORE
 100 #   define CGOTRESTORE                                                  \
 101     lwz 30,44(1)
 102 #  endif
 103 # endif
 104
 105 # ifdef HAVE_TLS_SUPPORT
 106 #  ifndef __ASSEMBLER__
 107 #   define SINGLE_THREAD_P                                              \
 108   __builtin_expect (THREAD_GETMEM (THREAD_SELF, p_multiple_threads) == 0, 1)
 109 #  else
 110 #   define SINGLE_THREAD_P                                              \
 111   lwz 10,MULTIPLE_THREADS_OFFSET(2);                                    \
 112   cmpwi 10,0
 113 #  endif
 114 # else
 115 #  if !defined NOT_IN_libc
 116 #   define __local_multiple_threads __libc_multiple_threads
 117 #  else
 118 #   define __local_multiple_threads __librt_multiple_threads
 119 #  endif
 120 #  ifndef __ASSEMBLER__
 121 extern int __local_multiple_threads attribute_hidden;
 122 #   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
 123 #  else
 124 #   if !defined __PIC__
 125 #    define SINGLE_THREAD_P                                             \
 126   lis 10,__local_multiple_threads@ha;                                   \
 127   lwz 10,__local_multiple_threads@l(10);                                \
 128   cmpwi 10,0
 129 #   else
 130 #    ifdef HAVE_ASM_PPC_REL16
 131 #     define SINGLE_THREAD_P                                            \
 132   mflr 9;                                                               \
 133   bcl 20,31,1f;                                                         \
 134 1:mflr 10;                                                              \
 135   addis 10,10,__local_multiple_threads-1b@ha;                           \
 136   lwz 10,__local_multiple_threads-1b@l(10);                             \
 137   mtlr 9;                                                               \
 138   cmpwi 10,0
 139 #    else
 140 #     define SINGLE_THREAD_P                                            \
 141   mflr 9;                                                               \
 142   bl _GLOBAL_OFFSET_TABLE_@local-4;                                     \
 143   mflr 10;                                                              \
 144   mtlr 9;                                                               \
 145   lwz 10,__local_multiple_threads@got(10);                              \
 146   lwz 10,0(10);                                                         \
 147   cmpwi 10,0
 148 #    endif
 149 #   endif
 150 #  endif
 151 # endif
 152
 153 #elif !defined __ASSEMBLER__
 154
 155 /* This code should never be used but we define it anyhow.  */
 156 # define SINGLE_THREAD_P (1)
 157
 158 #endif