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+/* Machine-dependent signal context structure for GNU Hurd. Alpha version.
+Copyright (C) 1994 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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/* 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. */
+ };