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

   1 /* Copyright (C) 1997, 1998, 2000, 2003, 2004 Free Software Foundation, Inc.
   2    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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /* Don't rely on this, the interface is currently messed up and may need to
  20    be broken to be fixed.  */
  21 #ifndef _SYS_UCONTEXT_H
  22 #define _SYS_UCONTEXT_H 1
  23
  24 #include <features.h>
  25 #include <sgidefs.h>
  26 #include <signal.h>
  27
  28 /* We need the signal context definitions even if they are not used
  29    included in <signal.h>.  */
  30 #include <bits/sigcontext.h>
  31
  32 /* Type for general register.  Even in o32 we assume 64-bit registers,
  33    like the kernel.  */
  34 __extension__ typedef unsigned long long int greg_t;
  35
  36 /* Number of general registers.  */
  37 #define NGREG   32
  38 #define NFPREG  32
  39
  40 /* Container for all general registers.  */
  41 typedef greg_t gregset_t[NGREG];
  42
  43 /* Container for all FPU registers.  */
  44 typedef struct fpregset {
  45         union {
  46                 double  fp_dregs[NFPREG];
  47                 struct {
  48                         float           _fp_fregs;
  49                         unsigned int    _fp_pad;
  50                 } fp_fregs[NFPREG];
  51         } fp_r;
  52 } fpregset_t;
  53
  54
  55 /* Context to describe whole processor state.  */
  56 #if _MIPS_SIM == _ABIO32
  57 /* Earlier versions of glibc for mips had an entirely different
  58    definition of mcontext_t, that didn't even resemble the
  59    corresponding kernel data structure.  Since all legitimate uses of
  60    ucontext_t in glibc mustn't have accessed anything beyond
  61    uc_mcontext and, even then, taking a pointer to it, casting it to
  62    sigcontext_t, and accessing it as such, which is what it has always
  63    been, this can still be rectified.  Fortunately, makecontext,
  64    [gs]etcontext et all have never been implemented.  */
  65 typedef struct
  66   {
  67     unsigned int regmask;
  68     unsigned int status;
  69     greg_t pc;
  70     gregset_t gregs;
  71     fpregset_t fpregs;
  72     unsigned int fp_owned;
  73     unsigned int fpc_csr;
  74     unsigned int fpc_eir;
  75     unsigned int used_math;
  76     unsigned int ssflags;
  77     greg_t mdhi;
  78     greg_t mdlo;
  79     unsigned int cause;
  80     unsigned int badvaddr;
  81   } mcontext_t;
  82 #else
  83 typedef struct
  84   {
  85     gregset_t gregs;
  86     fpregset_t fpregs;
  87     greg_t mdhi;
  88     greg_t mdlo;
  89     greg_t pc;
  90     unsigned int status;
  91     unsigned int fpc_csr;
  92     unsigned int fpc_eir;
  93     unsigned int used_math;
  94     unsigned int cause;
  95     unsigned int badvaddr;
  96   } mcontext_t;
  97 #endif
  98
  99 /* Userlevel context.  */
 100 typedef struct ucontext
 101   {
 102     unsigned long int uc_flags;
 103     struct ucontext *uc_link;
 104     stack_t uc_stack;
 105     mcontext_t uc_mcontext;
 106     __sigset_t uc_sigmask;
 107   } ucontext_t;
 108
 109 #endif /* sys/ucontext.h */