ports/sysdeps/unix/sysv/linux/tile/nptl/sysdep-cancel.h

   1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   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 <nptl/pthreadP.h>
  23 #endif
  24
  25 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  26
  27 /* Allow hacking in some extra code if desired. */
  28 #ifndef PSEUDO_EXTRA
  29 #define PSEUDO_EXTRA
  30 #endif
  31
  32 #undef PSEUDO
  33 #define PSEUDO(name, syscall_name, args)                                      \
  34   ENTRY(__##syscall_name##_nocancel);                                         \
  35     PSEUDO_EXTRA                                                              \
  36     moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name);                       \
  37     swint1;                                                                   \
  38     BNEZ r1, 0f;                                                              \
  39     jrp lr;                                                                   \
  40   END(__##syscall_name##_nocancel);                                           \
  41   ENTRY (name)                                                                \
  42     SINGLE_THREAD_P(r11);                                                     \
  43     BEQZ r11, L(pseudo_cancel);                                               \
  44     PSEUDO_EXTRA                                                              \
  45     moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name);                       \
  46     swint1;                                                                   \
  47     BNEZ r1, 0f;                                                              \
  48     jrp lr;                                                                   \
  49   L(pseudo_cancel):                                                           \
  50     {                                                                         \
  51      move r11, sp;                                                            \
  52      ST sp, lr;                                                               \
  53      ADDI_PTR sp, sp, -STKSPACE;                                              \
  54     };                                                                        \
  55     cfi_offset (lr, 0);                                                       \
  56     cfi_def_cfa_offset (STKSPACE);                                            \
  57     {                                                                         \
  58      ADDI_PTR r12, sp, REGSIZE;                                               \
  59      ADDI_PTR r13, sp, 2 * REGSIZE;     /* set up for PUSHARGS_0 */           \
  60     };                                                                        \
  61     ST r12, r11;                                                              \
  62     PUSHARGS_##args                     /* save syscall args */               \
  63     CENABLE;                                                                  \
  64     ADDI_PTR r12, sp, 10 * REGSIZE;                                           \
  65     {                                                                         \
  66      ST r12, r0;                        /* save mask */                       \
  67      ADDI_PTR r13, sp, 2 * REGSIZE;     /* set up for POPARGS_0 */            \
  68     };                                                                        \
  69     POPARGS_##args                      /* restore syscall args */            \
  70     PSEUDO_EXTRA                                                              \
  71     moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name);                       \
  72     swint1;                                                                   \
  73     ADDI_PTR r12, sp, 12 * REGSIZE;                                           \
  74     {                                                                         \
  75      ST r12, r1;                        /* save syscall result */             \
  76      ADDI_PTR r12, sp, 11 * REGSIZE;                                          \
  77     };                                                                        \
  78     {                                                                         \
  79      ST r12, r0;                                                              \
  80      ADDI_PTR r13, sp, 10 * REGSIZE;                                          \
  81     };                                                                        \
  82     LD r0, r13;                         /* pass mask as arg1 */               \
  83     CDISABLE;                                                                 \
  84     {                                                                         \
  85      ADDI_PTR lr, sp, STKSPACE;                                               \
  86      ADDI_PTR r0, sp, 11 * REGSIZE;                                           \
  87     };                                                                        \
  88     {                                                                         \
  89      LD r0, r0;                                                               \
  90      ADDI_PTR r1, sp, 12 * REGSIZE;                                           \
  91     };                                                                        \
  92     LD r1, r1;                                                                \
  93     {                                                                         \
  94      LD lr, lr;                                                               \
  95      ADDI_PTR sp, sp, STKSPACE;                                               \
  96     };                                                                        \
  97     cfi_def_cfa_offset (0);                                                   \
  98     BNEZ r1, 0f
  99
 100 # define PUSHARGS_0 /* nothing to do */
 101 # define PUSHARGS_1 PUSHARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; ST r13, r0 };
 102 # define PUSHARGS_2 PUSHARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; ST r14, r1 };
 103 # define PUSHARGS_3 PUSHARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; ST r13, r2 };
 104 # define PUSHARGS_4 PUSHARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; ST r14, r3 };
 105 # define PUSHARGS_5 PUSHARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; ST r13, r4 };
 106 # define PUSHARGS_6 PUSHARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; ST r14, r5 };
 107 # define PUSHARGS_7 PUSHARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; ST r13, r6 };
 108
 109 # define POPARGS_0  /* nothing to do */
 110 # define POPARGS_1  POPARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; LD r0, r13 };
 111 # define POPARGS_2  POPARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; LD r1, r14 };
 112 # define POPARGS_3  POPARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; LD r2, r13 };
 113 # define POPARGS_4  POPARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; LD r3, r14 };
 114 # define POPARGS_5  POPARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; LD r4, r13 };
 115 # define POPARGS_6  POPARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; LD r5, r14 };
 116 # define POPARGS_7  POPARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; LD r6, r13 };
 117
 118 # define STKSPACE       (13 * REGSIZE)
 119
 120 # ifdef IS_IN_libpthread
 121 #  define CENABLE       jal __pthread_enable_asynccancel
 122 #  define CDISABLE      jal __pthread_disable_asynccancel
 123 # elif defined IS_IN_librt
 124 #  define CENABLE       jal __librt_enable_asynccancel
 125 #  define CDISABLE      jal __librt_disable_asynccancel
 126 # else
 127 #  define CENABLE       jal __libc_enable_asynccancel
 128 #  define CDISABLE      jal __libc_disable_asynccancel
 129 # endif
 130
 131 # ifndef __ASSEMBLER__
 132 #  define SINGLE_THREAD_P                                               \
 133         __builtin_expect (THREAD_GETMEM (THREAD_SELF,                   \
 134                                          header.multiple_threads)       \
 135                           == 0, 1)
 136 # else
 137 #  define SINGLE_THREAD_P(reg)                                          \
 138   ADDLI_PTR reg, tp, MULTIPLE_THREADS_OFFSET;                           \
 139   LD reg, reg;                                                          \
 140   CMPEQI reg, reg, 0
 141 #endif
 142
 143 #elif !defined __ASSEMBLER__
 144
 145 # define SINGLE_THREAD_P 1
 146 # define NO_CANCELLATION 1
 147
 148 #endif
 149
 150 #ifndef __ASSEMBLER__
 151 # define RTLD_SINGLE_THREAD_P                                           \
 152   __builtin_expect (THREAD_GETMEM (THREAD_SELF,                         \
 153                                    header.multiple_threads) == 0, 1)
 154 #endif