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

   1 /* Copyright (C) 1997-2016 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 <signal.h>
  24
  25 /* We need the signal context definitions even if they are not exposed
  26    by <signal.h>.  */
  27 #include <bits/sigcontext.h>
  28 #include <bits/sigstack.h>
  29
  30 #include <sgidefs.h>
  31
  32
  33 /* Type for general register.  Even in o32 we assume 64-bit registers,
  34    like the kernel.  */
  35 __extension__ typedef unsigned long long int greg_t;
  36
  37 /* Number of general registers.  */
  38 #define NGREG   32
  39 #define NFPREG  32
  40
  41 /* Container for all general registers.  */
  42 typedef greg_t gregset_t[NGREG];
  43
  44 /* Container for all FPU registers.  */
  45 typedef struct fpregset {
  46         union {
  47                 double  fp_dregs[NFPREG];
  48                 struct {
  49                         float           _fp_fregs;
  50                         unsigned int    _fp_pad;
  51                 } fp_fregs[NFPREG];
  52         } fp_r;
  53 } fpregset_t;
  54
  55
  56 /* Context to describe whole processor state.  */
  57 #if _MIPS_SIM == _ABIO32
  58 /* Earlier versions of glibc for mips had an entirely different
  59    definition of mcontext_t, that didn't even resemble the
  60    corresponding kernel data structure.  Fortunately, makecontext,
  61    [gs]etcontext et all were not implemented back then, so this can
  62    still be rectified.  */
  63 typedef struct
  64   {
  65     unsigned int regmask;
  66     unsigned int status;
  67     greg_t pc;
  68     gregset_t gregs;
  69     fpregset_t fpregs;
  70     unsigned int fp_owned;
  71     unsigned int fpc_csr;
  72     unsigned int fpc_eir;
  73     unsigned int used_math;
  74     unsigned int dsp;
  75     greg_t mdhi;
  76     greg_t mdlo;
  77     unsigned long hi1;
  78     unsigned long lo1;
  79     unsigned long hi2;
  80     unsigned long lo2;
  81     unsigned long hi3;
  82     unsigned long lo3;
  83   } mcontext_t;
  84 #else
  85 typedef struct
  86   {
  87     gregset_t gregs;
  88     fpregset_t fpregs;
  89     greg_t mdhi;
  90     greg_t hi1;
  91     greg_t hi2;
  92     greg_t hi3;
  93     greg_t mdlo;
  94     greg_t lo1;
  95     greg_t lo2;
  96     greg_t lo3;
  97     greg_t pc;
  98     unsigned int fpc_csr;
  99     unsigned int used_math;
 100     unsigned int dsp;
 101     unsigned int reserved;
 102   } mcontext_t;
 103 #endif
 104
 105 /* Userlevel context.  */
 106 typedef struct ucontext
 107   {
 108     unsigned long int uc_flags;
 109     struct ucontext *uc_link;
 110     stack_t uc_stack;
 111     mcontext_t uc_mcontext;
 112     __sigset_t uc_sigmask;
 113   } ucontext_t;
 114
 115 #endif /* sys/ucontext.h */