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/* Machine-dependent signal context structure for FreeBSD. i386 version.
Copyright (C) 1991-1992,1994,1997,2001-2002 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif
#ifndef _BITS_SIGCONTEXT_H
#define _BITS_SIGCONTEXT_H 1
/* State of this thread when the signal was taken.
The unions below are for compatibility with Linux (whose sigcontext
components don't have sc_ prefix) */
__extension__ struct sigcontext
{
__sigset_t sc_mask; /* Blocked signals to restore. */
int sc_onstack; /* Nonzero if running on sigstack. */
/* Segment registers. */
union { int sc_gs; int gs; };
union { int sc_fs; int fs; };
union { int sc_es; int es; };
union { int sc_ds; int ds; };
/* "General" registers. These members are in the order that the i386
`pusha' and `popa' instructions use (`popa' ignores %esp). */
union { int sc_edi; int edi; };
union { int sc_esi; int esi; };
union { int sc_ebp; int ebp; };
union { int sc_isp; int isp; }; /* Not used; sc_esp is used instead. */
union { int sc_ebx; int ebx; };
union { int sc_edx; int edx; };
union { int sc_ecx; int ecx; };
union { int sc_eax; int eax; };
union { int sc_trapno; int trapno; };
union { int sc_err; int err; };
union { int sc_eip; int eip; }; /* Instruction pointer. */
union { int sc_cs; int cs; }; /* Code segment register. */
union { int sc_efl; int eflags; }; /* Processor flags. */
union { int sc_esp; int esp; }; /* This stack pointer is used. */
union { int sc_ss; int ss; }; /* Stack segment register. */
int sc_len; /* sizeof(mcontext_t) */
/*
* XXX - See <machine/ucontext.h> and <machine/npx.h> for
* the following fields.
*/
int sc_fpformat;
int sc_ownedfp;
int sc_spare1[1];
int sc_fpstate[128] __attribute__((aligned(16)));
int sc_spare2[8];
};
/* Traditional BSD names for some members. */
#define sc_sp sc_esp /* Stack pointer. */
#define sc_fp sc_ebp /* Frame pointer. */
#define sc_pc sc_eip /* Process counter. */
#define sc_ps sc_efl
#define sc_eflags sc_efl
#if 1 /* FIXME: These need verification. */
/* Codes for SIGILL. */
#define ILL_PRIVIN_FAULT 1
#define ILL_ALIGN_FAULT 14
#define ILL_FPOP_FAULT 24
/* Codes for SIGBUS. */
#define BUS_PAGE_FAULT 12
#define BUS_SEGNP_FAULT 26
#define BUS_STK_FAULT 27
#define BUS_SEGM_FAULT 29
#endif
#endif /* _BITS_SIGCONTEXT_H */
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