freebsd-dev/sys/amd64/include/ucontext.h
Peter Wemm 23eeeff7be Split 4.x and 5.x signal handling so that we can keep 4.x signal
handling clean and functional as 5.x evolves.  This allows some of the
nasty bandaids in the 5.x codepaths to be unwound.

Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an
anti-foot-shooting measure in place, 5.x folks need this for a while) and
finish encapsulating the older stuff under COMPAT_43.  Since the ancient
stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *'
to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn
is supposed to take), add a compile time check to prevent foot shooting
there too.  Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc.

Tested on: i386, alpha, ia64.  Compiled on sparc64 (a few days ago).
Approved by: re
2002-10-25 19:10:58 +00:00

111 lines
3.2 KiB
C

/*-
* 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_
typedef struct __mcontext {
/*
* The first 20 fields must match the definition of
* sigcontext. So that we can support sigcontext
* and ucontext_t at the same time.
*/
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs;
int mc_fs;
int mc_es;
int mc_ds;
int mc_edi;
int mc_esi;
int mc_ebp;
int mc_isp;
int mc_ebx;
int mc_edx;
int mc_ecx;
int mc_eax;
int mc_trapno;
int mc_err;
int mc_eip;
int mc_cs;
int mc_eflags;
int mc_esp; /* machine state */
int mc_ss;
int mc_len; /* sizeof(mcontext_t) */
#define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
#define _MC_FPFMT_387 0x10001
#define _MC_FPFMT_XMM 0x10002
int mc_fpformat;
#define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
#define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
int mc_ownedfp;
int mc_spare1[1]; /* align next field to 16 bytes */
int mc_fpstate[128]; /* must be multiple of 16 bytes */
int mc_spare2[8];
} mcontext_t;
#ifdef _KERNEL
#ifdef COMPAT_FREEBSD4
/* For 4.x binaries */
struct mcontext4 {
int mc_onstack; /* XXX - sigcontext compat. */
int mc_gs;
int mc_fs;
int mc_es;
int mc_ds;
int mc_edi;
int mc_esi;
int mc_ebp;
int mc_isp;
int mc_ebx;
int mc_edx;
int mc_ecx;
int mc_eax;
int mc_trapno;
int mc_err;
int mc_eip;
int mc_cs;
int mc_eflags;
int mc_esp; /* machine state */
int mc_ss;
int mc_fpregs[28]; /* env87 + fpacc87 + u_long */
int __spare__[17];
};
#endif
struct thread;
void get_mcontext(struct thread *td, mcontext_t *mcp);
int set_mcontext(struct thread *td, const mcontext_t *mcp);
#endif
#endif /* !_MACHINE_UCONTEXT_H_ */