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

   1 /* Copyright (C) 1997, 1998, 2000, 2003, 2004, 2006, 2009 Free Software
   2    Foundation, Inc.  This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* Don't rely on this, the interface is currently messed up and may need to
  19    be broken to be fixed.  */
  20 #ifndef _SYS_UCONTEXT_H
  21 #define _SYS_UCONTEXT_H 1
  22
  23 #include <features.h>
  24 #include <sgidefs.h>
  25 #include <signal.h>
  26
  27 /* We need the signal context definitions even if they are not used
  28    included in <signal.h>.  */
  29 #include <bits/sigcontext.h>
  30
  31 /* Type for general register.  Even in o32 we assume 64-bit registers,
  32    like the kernel.  */
  33 __extension__ typedef unsigned long long int greg_t;
  34
  35 /* Number of general registers.  */
  36 #define NGREG   32
  37 #define NFPREG  32
  38
  39 /* Container for all general registers.  */
  40 typedef greg_t gregset_t[NGREG];
  41
  42 /* Container for all FPU registers.  */
  43 typedef struct fpregset {
  44         union {
  45                 double  fp_dregs[NFPREG];
  46                 struct {
  47                         float           _fp_fregs;
  48                         unsigned int    _fp_pad;
  49                 } fp_fregs[NFPREG];
  50         } fp_r;
  51 } fpregset_t;
  52
  53
  54 /* Context to describe whole processor state.  */
  55 #if _MIPS_SIM == _ABIO32
  56 /* Earlier versions of glibc for mips had an entirely different
  57    definition of mcontext_t, that didn't even resemble the
  58    corresponding kernel data structure.  Fortunately, makecontext,
  59    [gs]etcontext et all were not implemented back then, so this can
  60    still be rectified.  */
  61 typedef struct
  62   {
  63     unsigned int regmask;
  64     unsigned int status;
  65     greg_t pc;
  66     gregset_t gregs;
  67     fpregset_t fpregs;
  68     unsigned int fp_owned;
  69     unsigned int fpc_csr;
  70     unsigned int fpc_eir;
  71     unsigned int used_math;
  72     unsigned int dsp;
  73     greg_t mdhi;
  74     greg_t mdlo;
  75     unsigned long hi1;
  76     unsigned long lo1;
  77     unsigned long hi2;
  78     unsigned long lo2;
  79     unsigned long hi3;
  80     unsigned long lo3;
  81   } mcontext_t;
  82 #else
  83 typedef struct
  84   {
  85     gregset_t gregs;
  86     fpregset_t fpregs;
  87     greg_t mdhi;
  88     greg_t hi1;
  89     greg_t hi2;
  90     greg_t hi3;
  91     greg_t mdlo;
  92     greg_t lo1;
  93     greg_t lo2;
  94     greg_t lo3;
  95     greg_t pc;
  96     unsigned int fpc_csr;
  97     unsigned int used_math;
  98     unsigned int dsp;
  99     unsigned int reserved;
 100   } mcontext_t;
 101 #endif
 102
 103 /* Userlevel context.  */
 104 typedef struct ucontext
 105   {
 106     unsigned long int uc_flags;
 107     struct ucontext *uc_link;
 108     stack_t uc_stack;
 109     mcontext_t uc_mcontext;
 110     __sigset_t uc_sigmask;
 111   } ucontext_t;
 112
 113 #endif /* sys/ucontext.h */