ports/sysdeps/unix/sysv/linux/mips/sys/ucontext.h

   1 /* Copyright (C) 1997-2014 Free Software Foundation, Inc.  This file is part of the GNU C Library.
   2
   3    The GNU C Library is free software; you can redistribute it and/or
   4    modify it under the terms of the GNU Lesser General Public
   5    License as published by the Free Software Foundation; either
   6    version 2.1 of the License, or (at your option) any later version.
   7
   8    The GNU C Library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Lesser General Public License for more details.
  12
  13    You should have received a copy of the GNU Lesser General Public
  14    License along with the GNU C Library.  If not, see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 /* Don't rely on this, the interface is currently messed up and may need to
  18    be broken to be fixed.  */
  19 #ifndef _SYS_UCONTEXT_H
  20 #define _SYS_UCONTEXT_H 1
  21
  22 #include <features.h>
  23 #include <sgidefs.h>
  24 #include <signal.h>
  25
  26 /* We need the signal context definitions even if they are not used
  27    included in <signal.h>.  */
  28 #include <bits/sigcontext.h>
  29
  30 /* Type for general register.  Even in o32 we assume 64-bit registers,
  31    like the kernel.  */
  32 __extension__ typedef unsigned long long int greg_t;
  33
  34 /* Number of general registers.  */
  35 #define NGREG   32
  36 #define NFPREG  32
  37
  38 /* Container for all general registers.  */
  39 typedef greg_t gregset_t[NGREG];
  40
  41 /* Container for all FPU registers.  */
  42 typedef struct fpregset {
  43         union {
  44                 double  fp_dregs[NFPREG];
  45                 struct {
  46                         float           _fp_fregs;
  47                         unsigned int    _fp_pad;
  48                 } fp_fregs[NFPREG];
  49         } fp_r;
  50 } fpregset_t;
  51
  52
  53 /* Context to describe whole processor state.  */
  54 #if _MIPS_SIM == _ABIO32
  55 /* Earlier versions of glibc for mips had an entirely different
  56    definition of mcontext_t, that didn't even resemble the
  57    corresponding kernel data structure.  Fortunately, makecontext,
  58    [gs]etcontext et all were not implemented back then, so this can
  59    still be rectified.  */
  60 typedef struct
  61   {
  62     unsigned int regmask;
  63     unsigned int status;
  64     greg_t pc;
  65     gregset_t gregs;
  66     fpregset_t fpregs;
  67     unsigned int fp_owned;
  68     unsigned int fpc_csr;
  69     unsigned int fpc_eir;
  70     unsigned int used_math;
  71     unsigned int dsp;
  72     greg_t mdhi;
  73     greg_t mdlo;
  74     unsigned long hi1;
  75     unsigned long lo1;
  76     unsigned long hi2;
  77     unsigned long lo2;
  78     unsigned long hi3;
  79     unsigned long lo3;
  80   } mcontext_t;
  81 #else
  82 typedef struct
  83   {
  84     gregset_t gregs;
  85     fpregset_t fpregs;
  86     greg_t mdhi;
  87     greg_t hi1;
  88     greg_t hi2;
  89     greg_t hi3;
  90     greg_t mdlo;
  91     greg_t lo1;
  92     greg_t lo2;
  93     greg_t lo3;
  94     greg_t pc;
  95     unsigned int fpc_csr;
  96     unsigned int used_math;
  97     unsigned int dsp;
  98     unsigned int reserved;
  99   } mcontext_t;
 100 #endif
 101
 102 /* Userlevel context.  */
 103 typedef struct ucontext
 104   {
 105     unsigned long int uc_flags;
 106     struct ucontext *uc_link;
 107     stack_t uc_stack;
 108     mcontext_t uc_mcontext;
 109     __sigset_t uc_sigmask;
 110   } ucontext_t;
 111
 112 #endif /* sys/ucontext.h */