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author | marcel <marcel@FreeBSD.org> | 1999-09-29 15:06:27 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 1999-09-29 15:06:27 +0000 |
commit | a16d76cb5680cf0afd1a3be9be9d1f7ea686a96c (patch) | |
tree | 01641d7a39068193783b082ecaf28021e39ce36c /sys/i386/include/ucontext.h | |
parent | d5e8d714b93b1824409b762780bec45541995276 (diff) | |
download | FreeBSD-src-a16d76cb5680cf0afd1a3be9be9d1f7ea686a96c.zip FreeBSD-src-a16d76cb5680cf0afd1a3be9be9d1f7ea686a96c.tar.gz |
sigset_t change (part 3 of 5)
-----------------------------
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.
Diffstat (limited to 'sys/i386/include/ucontext.h')
-rw-r--r-- | sys/i386/include/ucontext.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sys/i386/include/ucontext.h b/sys/i386/include/ucontext.h new file mode 100644 index 0000000..bdf2e1d --- /dev/null +++ b/sys/i386/include/ucontext.h @@ -0,0 +1,43 @@ +/*- + * Copyright (c) 1999 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_UCONTEXT_H_ +#define _MACHINE_UCONTEXT_H_ 1 + +#include <machine/frame.h> + +typedef struct { + int mc_gs; /* %gs */ + struct trapframe mc_tf; /* trapframe */ + int mc_fpregs[28]; /* env87 + fpacc87 + u_long */ + int __spare__[17]; +} mcontext_t; + +#endif /* _MACHINE_UCONTEXT_H_ */ |