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66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
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/* Machine-dependent signal context structure for GNU Hurd. Alpha version.
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Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* Signal handlers are actually called:
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void handler (int sig, int code, struct sigcontext *scp); */
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/* State of this thread when the signal was taken. */
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struct sigcontext
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{
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/* These first members are machine-independent. */
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long int sc_onstack; /* Nonzero if running on sigstack. */
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__sigset_t sc_mask; /* Blocked signals to restore. */
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/* MiG reply port this thread is using. */
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unsigned long int sc_reply_port;
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/* Port this thread is doing an interruptible RPC on. */
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unsigned long int sc_intr_port;
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/* Error code associated with this signal (interpreted as `error_t'). */
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int sc_error;
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/* All following members are machine-dependent. The rest of this
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structure is written to be laid out identically to:
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{
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struct alpha_thread_state basic;
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struct alpha_exc_state exc;
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struct alpha_float_state fpu;
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}
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trampoline.c knows this, so it must be changed if this changes. */
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#define sc_alpha_thread_state sc_regs /* Beginning of correspondence. */
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long int sc_regs[31]; /* General registers $0..$30. */
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long int sc_pc; /* Program counter. */
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/* struct alpha_exc_state */
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#define sc_alpha_exc_state sc_badvaddr
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unsigned long int sc_badvaddr;
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unsigned int sc_cause; /* Machine-level trap code. */
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#define SC_CAUSE_SET_SSTEP 1
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int sc_used_fpa; /* Nonzero if FPU was used. */
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/* struct alpha_float_state
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This is only filled in if sc_used_fpa is nonzero. */
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#define sc_alpha_float_state sc_fpregs
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double sc_fpregs[31]; /* Floating point registers $f0..$f30. */
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long int sc_fpcsr; /* Floating point control/status register. */
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};
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