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91078fca0c
-----------------------------
By introducing a new sigframe so that the signal handler operates
on the new siginfo_t and on ucontext_t instead of sigcontext, we
now need two version of sendsig and sigreturn.
A flag in struct proc determines whether the process expects an
old sigframe or a new sigframe. The signal trampoline handles
which sigreturn to call. It does this by testing for a magic
cookie in the frame.
The alpha uses osigreturn to implement longjmp. This means that
osigreturn is not only used for compatibility with existing
binaries. To handle the new sigset_t, setjmp saves it in
sc_reserved (see NOTE).
the struct sigframe has been moved from frame.h to sigframe.h
to handle the complex header dependencies that was caused by
the new sigframe.
NOTE: For the i386, the size of jmp_buf has been increased to hold
the new sigset_t. On the alpha this has been prevented by
using sc_reserved in sigcontext.
164 lines
4.1 KiB
C
164 lines
4.1 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FRAME_H_
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#define _MACHINE_FRAME_H_ 1
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/*
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* System stack frames.
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*/
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/*
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* Exception/Trap Stack Frame
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*/
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struct trapframe {
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int tf_fs;
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int tf_es;
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int tf_ds;
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int tf_edi;
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int tf_esi;
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int tf_ebp;
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int tf_isp;
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int tf_ebx;
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int tf_edx;
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int tf_ecx;
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int tf_eax;
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int tf_trapno;
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/* below portion defined in 386 hardware */
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int tf_err;
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int tf_eip;
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int tf_cs;
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int tf_eflags;
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/* below only when crossing rings (e.g. user to kernel) */
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int tf_esp;
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int tf_ss;
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};
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/* Superset of trap frame, for traps from virtual-8086 mode */
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struct trapframe_vm86 {
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int tf_fs;
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int tf_es;
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int tf_ds;
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int tf_edi;
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int tf_esi;
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int tf_ebp;
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int tf_isp;
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int tf_ebx;
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int tf_edx;
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int tf_ecx;
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int tf_eax;
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int tf_trapno;
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/* below portion defined in 386 hardware */
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int tf_err;
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int tf_eip;
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int tf_cs;
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int tf_eflags;
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/* below only when crossing rings (e.g. user to kernel) */
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int tf_esp;
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int tf_ss;
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/* below only when switching out of VM86 mode */
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int tf_vm86_es;
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int tf_vm86_ds;
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int tf_vm86_fs;
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int tf_vm86_gs;
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};
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/* Interrupt stack frame */
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struct intrframe {
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int if_vec;
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int if_ppl;
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int if_fs;
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int if_es;
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int if_ds;
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int if_edi;
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int if_esi;
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int if_ebp;
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int :32;
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int if_ebx;
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int if_edx;
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int if_ecx;
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int if_eax;
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int :32; /* for compat with trap frame - trapno */
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int :32; /* for compat with trap frame - err */
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/* below portion defined in 386 hardware */
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int if_eip;
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int if_cs;
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int if_eflags;
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/* below only when crossing rings (e.g. user to kernel) */
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int if_esp;
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int if_ss;
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};
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/* frame of clock (same as interrupt frame) */
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struct clockframe {
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int cf_vec;
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int cf_ppl;
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int cf_fs;
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int cf_es;
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int cf_ds;
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int cf_edi;
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int cf_esi;
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int cf_ebp;
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int :32;
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int cf_ebx;
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int cf_edx;
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int cf_ecx;
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int cf_eax;
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int :32; /* for compat with trap frame - trapno */
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int :32; /* for compat with trap frame - err */
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/* below portion defined in 386 hardware */
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int cf_eip;
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int cf_cs;
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int cf_eflags;
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/* below only when crossing rings (e.g. user to kernel) */
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int cf_esp;
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int cf_ss;
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};
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int kdb_trap __P((int, int, struct trapframe *));
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extern int (*pmath_emulate) __P((struct trapframe *));
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#define INTR_TO_TRAPFRAME(frame) ((struct trapframe *)&(frame)->if_fs)
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#endif /* _MACHINE_FRAME_H_ */
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