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/* Machine-dependent signal context structure for GNU Hurd. Alpha version.
Copyright (C) 1994, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SIGNAL_H
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif
/* Signal handlers are actually called:
void handler (int sig, int code, struct sigcontext *scp); */
/* State of this thread when the signal was taken. */
struct sigcontext
{
/* These first members are machine-independent. */
long int sc_onstack; /* Nonzero if running on sigstack. */
__sigset_t sc_mask; /* Blocked signals to restore. */
/* MiG reply port this thread is using. */
unsigned long int sc_reply_port;
/* Port this thread is doing an interruptible RPC on. */
unsigned long int sc_intr_port;
/* Error code associated with this signal (interpreted as `error_t'). */
int sc_error;
/* All following members are machine-dependent. The rest of this
structure is written to be laid out identically to:
{
struct alpha_thread_state basic;
struct alpha_exc_state exc;
struct alpha_float_state fpu;
}
trampoline.c knows this, so it must be changed if this changes. */
#define sc_alpha_thread_state sc_regs /* Beginning of correspondence. */
long int sc_regs[31]; /* General registers $0..$30. */
long int sc_pc; /* Program counter. */
/* struct alpha_exc_state */
#define sc_alpha_exc_state sc_badvaddr
unsigned long int sc_badvaddr;
unsigned int sc_cause; /* Machine-level trap code. */
#define SC_CAUSE_SET_SSTEP 1
int sc_used_fpa; /* Nonzero if FPU was used. */
/* struct alpha_float_state
This is only filled in if sc_used_fpa is nonzero. */
#define sc_alpha_float_state sc_fpregs
double sc_fpregs[31]; /* Floating point registers $f0..$f30. */
long int sc_fpcsr; /* Floating point control/status register. */
};
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