sysdeps/mach/hurd/mips/bits/sigcontext.h

   1 /* Machine-dependent signal context structure for GNU Hurd.  MIPS version.
   2    Copyright (C) 1994,97,2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
  21 # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
  22 #endif
  23
  24 #ifndef sc_mips_thread_state
  25
  26 /* Signal handlers are actually called:
  27    void handler (int sig, int code, struct sigcontext *scp);  */
  28
  29 /* State of this thread when the signal was taken.  */
  30 struct sigcontext
  31   {
  32     /* These first members are machine-independent.  */
  33
  34     int sc_onstack;             /* Nonzero if running on sigstack.  */
  35     __sigset_t sc_mask;         /* Blocked signals to restore.  */
  36
  37     /* MiG reply port this thread is using.  */
  38     unsigned int sc_reply_port;
  39
  40     /* Port this thread is doing an interruptible RPC on.  */
  41     unsigned int sc_intr_port;
  42
  43     /* Error code associated with this signal (interpreted as `error_t').  */
  44     int sc_error;
  45
  46     /* All following members are machine-dependent.  The rest of this
  47        structure is written to be laid out identically to:
  48         {
  49           struct mips_thread_state ts;
  50           struct mips_exc_state es;
  51           struct mips_float_state fs;
  52         }
  53        trampoline.c knows this, so it must be changed if this changes.  */
  54 #define sc_mips_thread_state sc_gpr /* Beginning of correspondence.  */
  55     int sc_gpr[31];             /* "General" registers; [0] is r1.  */
  56     int sc_mdlo, sc_mdhi;       /* Low and high multiplication results.  */
  57     int sc_pc;                  /* Instruction pointer.  */
  58
  59     /* struct mips_exc_state */
  60 #define sc_mips_exc_state sc_cause
  61     unsigned int sc_cause;      /* Machine-level trap code.  */
  62 #define SC_CAUSE_SST    0x00000044
  63     unsigned int sc_badvaddr;
  64     unsigned int sc_coproc_used; /* Which coprocessors the thread has used.  */
  65 #define SC_COPROC_USE_COP0      1 /* (by definition) */
  66 #define SC_COPROC_USE_COP1      2 /* FPA */
  67 #define SC_COPROC_USE_FPU       SC_COPROC_USE_COP1
  68 #define SC_COPROC_USE_COP2      4
  69 #define SC_COPROC_USE_COP3      8
  70
  71     /* struct mips_float_state
  72        This is only filled in if the SC_COPROC_USE_FPU bit
  73        is set in sc_coproc_used.  */
  74 #define sc_mips_float_state sc_fpr
  75     int sc_fpr[32];             /* FP registers.  */
  76     int sc_fpcsr;               /* FPU status register.  */
  77     int sc_fpeir;               /* FP exception instruction register.  */
  78   };
  79
  80 #endif /* sc_mips_thread_state */