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

   1 /* Copyright (C) 1997-2021 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    <https://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
  24 #include <bits/types/sigset_t.h>
  25 #include <bits/types/stack_t.h>
  26
  27 #include <sgidefs.h>
  28
  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 #ifdef __USE_MISC
  38 # define NGREG  __NGREG
  39 # define NFPREG __NFPREG
  40 #endif
  41
  42 /* Container for all general registers.  */
  43 typedef greg_t gregset_t[__NGREG];
  44
  45 #ifdef __USE_MISC
  46 # define __ctx(fld) fld
  47 #else
  48 # define __ctx(fld) __ ## fld
  49 #endif
  50
  51 /* Container for all FPU registers.  */
  52 typedef struct {
  53         union {
  54                 double  __ctx(fp_dregs)[__NFPREG];
  55                 struct {
  56                         float           _fp_fregs;
  57                         unsigned int    _fp_pad;
  58                 } __ctx(fp_fregs)[__NFPREG];
  59         } __ctx(fp_r);
  60 } fpregset_t;
  61
  62
  63 /* Context to describe whole processor state.  */
  64 #if _MIPS_SIM == _ABIO32
  65 /* Earlier versions of glibc for mips had an entirely different
  66    definition of mcontext_t, that didn't even resemble the
  67    corresponding kernel data structure.  Fortunately, makecontext,
  68    [gs]etcontext et all were not implemented back then, so this can
  69    still be rectified.  */
  70 typedef struct
  71   {
  72     unsigned int __ctx(regmask);
  73     unsigned int __ctx(status);
  74     greg_t __ctx(pc);
  75     gregset_t __ctx(gregs);
  76     fpregset_t __ctx(fpregs);
  77     unsigned int __ctx(fp_owned);
  78     unsigned int __ctx(fpc_csr);
  79     unsigned int __ctx(fpc_eir);
  80     unsigned int __ctx(used_math);
  81     unsigned int __ctx(dsp);
  82     greg_t __ctx(mdhi);
  83     greg_t __ctx(mdlo);
  84     unsigned long __ctx(hi1);
  85     unsigned long __ctx(lo1);
  86     unsigned long __ctx(hi2);
  87     unsigned long __ctx(lo2);
  88     unsigned long __ctx(hi3);
  89     unsigned long __ctx(lo3);
  90   } mcontext_t;
  91 #else
  92 typedef struct
  93   {
  94     gregset_t __ctx(gregs);
  95     fpregset_t __ctx(fpregs);
  96     greg_t __ctx(mdhi);
  97     greg_t __ctx(hi1);
  98     greg_t __ctx(hi2);
  99     greg_t __ctx(hi3);
 100     greg_t __ctx(mdlo);
 101     greg_t __ctx(lo1);
 102     greg_t __ctx(lo2);
 103     greg_t __ctx(lo3);
 104     greg_t __ctx(pc);
 105     unsigned int __ctx(fpc_csr);
 106     unsigned int __ctx(used_math);
 107     unsigned int __ctx(dsp);
 108     unsigned int __glibc_reserved1;
 109   } mcontext_t;
 110 #endif
 111
 112 /* Userlevel context.  */
 113 typedef struct ucontext_t
 114   {
 115     unsigned long int __ctx(uc_flags);
 116     struct ucontext_t *uc_link;
 117     stack_t uc_stack;
 118     mcontext_t uc_mcontext;
 119     sigset_t uc_sigmask;
 120   } ucontext_t;
 121
 122 #undef __ctx
 123
 124 #endif /* sys/ucontext.h */