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

   1 /* Cancellable system call stubs.  Linux/PowerPC64 version.
   2    Copyright (C) 2003, 2004, 2006 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sysdep.h>
  21 #include <tls.h>
  22 #ifndef __ASSEMBLER__
  23 # include <nptl/pthreadP.h>
  24 #endif
  25
  26 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  27
  28 # ifdef HAVE_ASM_GLOBAL_DOT_NAME
  29 #  define DASHDASHPFX(str) .__##str
  30 # else
  31 #  define DASHDASHPFX(str) __##str
  32 # endif
  33
  34 # undef PSEUDO
  35 # define PSEUDO(name, syscall_name, args)                               \
  36   .section ".text";                                                     \
  37   ENTRY (name)                                                          \
  38     SINGLE_THREAD_P;                                                    \
  39     bne- .Lpseudo_cancel;                                               \
  40   .type DASHDASHPFX(syscall_name##_nocancel),@function;                 \
  41   .globl DASHDASHPFX(syscall_name##_nocancel);                          \
  42   DASHDASHPFX(syscall_name##_nocancel):                                 \
  43     DO_CALL (SYS_ify (syscall_name));                                   \
  44     PSEUDO_RET;                                                         \
  45   .size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel);    \
  46   .Lpseudo_cancel:                                                      \
  47     stdu 1,-128(1);                                                     \
  48     cfi_adjust_cfa_offset (128);                                        \
  49     mflr 9;                                                             \
  50     std  9,128+16(1);                                                   \
  51     cfi_offset (lr, 16);                                                \
  52     DOCARGS_##args;     /* save syscall args around CENABLE.  */        \
  53     CENABLE;                                                            \
  54     std  3,112(1);      /* store CENABLE return value (MASK).  */       \
  55     UNDOCARGS_##args;   /* restore syscall args.  */                    \
  56     DO_CALL (SYS_ify (syscall_name));                                   \
  57     mfcr 0;             /* save CR/R3 around CDISABLE.  */              \
  58     std  3,120(1);                                                      \
  59     std  0,128+8(1);                                                    \
  60     cfi_offset (cr, 8);                                                 \
  61     ld   3,112(1);      /* pass MASK to CDISABLE.  */                   \
  62     CDISABLE;                                                           \
  63     ld   9,128+16(1);                                                   \
  64     ld   0,128+8(1);    /* restore CR/R3. */                            \
  65     ld   3,120(1);                                                      \
  66     mtlr 9;                                                             \
  67     mtcr 0;                                                             \
  68     addi 1,1,128;                                                       \
  69     cfi_adjust_cfa_offset (-128);                                       \
  70     cfi_restore (lr);                                                   \
  71     cfi_restore (cr)
  72
  73 # define DOCARGS_0
  74 # define UNDOCARGS_0
  75
  76 # define DOCARGS_1      std 3,128+48(1); DOCARGS_0
  77 # define UNDOCARGS_1    ld 3,128+48(1); UNDOCARGS_0
  78
  79 # define DOCARGS_2      std 4,128+56(1); DOCARGS_1
  80 # define UNDOCARGS_2    ld 4,128+56(1); UNDOCARGS_1
  81
  82 # define DOCARGS_3      std 5,128+64(1); DOCARGS_2
  83 # define UNDOCARGS_3    ld 5,128+64(1); UNDOCARGS_2
  84
  85 # define DOCARGS_4      std 6,128+72(1); DOCARGS_3
  86 # define UNDOCARGS_4    ld 6,128+72(1); UNDOCARGS_3
  87
  88 # define DOCARGS_5      std 7,128+80(1); DOCARGS_4
  89 # define UNDOCARGS_5    ld 7,128+80(1); UNDOCARGS_4
  90
  91 # define DOCARGS_6      std 8,128+88(1); DOCARGS_5
  92 # define UNDOCARGS_6    ld 8,128+88(1); UNDOCARGS_5
  93
  94 # ifdef IS_IN_libpthread
  95 #  ifdef SHARED
  96 #   define CENABLE      bl JUMPTARGET(__pthread_enable_asynccancel)
  97 #   define CDISABLE     bl JUMPTARGET(__pthread_disable_asynccancel)
  98 #  else
  99 #   define CENABLE      bl JUMPTARGET(__pthread_enable_asynccancel); nop
 100 #   define CDISABLE     bl JUMPTARGET(__pthread_disable_asynccancel); nop
 101 #  endif
 102 # elif !defined NOT_IN_libc
 103 #  ifdef SHARED
 104 #   define CENABLE      bl JUMPTARGET(__libc_enable_asynccancel)
 105 #   define CDISABLE     bl JUMPTARGET(__libc_disable_asynccancel)
 106 #  else
 107 #   define CENABLE      bl JUMPTARGET(__libc_enable_asynccancel); nop
 108 #   define CDISABLE     bl JUMPTARGET(__libc_disable_asynccancel); nop
 109 #  endif
 110 # elif defined IS_IN_librt
 111 #  ifdef SHARED
 112 #   define CENABLE      bl JUMPTARGET(__librt_enable_asynccancel)
 113 #   define CDISABLE     bl JUMPTARGET(__librt_disable_asynccancel)
 114 #  else
 115 #   define CENABLE      bl JUMPTARGET(__librt_enable_asynccancel); nop
 116 #   define CDISABLE     bl JUMPTARGET(__librt_disable_asynccancel); nop
 117 #  endif
 118 # else
 119 #  error Unsupported library
 120 # endif
 121
 122 # ifndef __ASSEMBLER__
 123 #  define SINGLE_THREAD_P                                               \
 124   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                         \
 125                                    header.multiple_threads) == 0, 1)
 126 # else
 127 #   define SINGLE_THREAD_P                                              \
 128   lwz   10,MULTIPLE_THREADS_OFFSET(13);                         \
 129   cmpwi 10,0
 130 # endif
 131
 132 #elif !defined __ASSEMBLER__
 133
 134 # define SINGLE_THREAD_P (1)
 135 # define NO_CANCELLATION 1
 136
 137 #endif
 138
 139 #ifndef __ASSEMBLER__
 140 # define RTLD_SINGLE_THREAD_P \
 141   __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
 142                                    header.multiple_threads) == 0, 1)
 143 #endif