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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
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*-
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* Copyright (c) 1999 Marcel Moolenaar
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* All rights reserved.
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_UCONTEXT_H_
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#define _MACHINE_UCONTEXT_H_
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typedef struct __mcontext {
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/*
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* The first 20 fields must match the definition of
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* sigcontext. So that we can support sigcontext
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* and ucontext_t at the same time.
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*/
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int mc_onstack; /* XXX - sigcontext compat. */
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int mc_gs;
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int mc_fs;
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int mc_es;
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int mc_ds;
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int mc_edi;
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int mc_esi;
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int mc_ebp;
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int mc_isp;
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int mc_ebx;
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int mc_edx;
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int mc_ecx;
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int mc_eax;
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int mc_trapno;
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int mc_err;
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int mc_eip;
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int mc_cs;
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int mc_eflags;
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int mc_esp; /* machine state */
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int mc_ss;
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int mc_len; /* sizeof(mcontext_t) */
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#define _MC_FPFMT_NODEV 0x10000 /* device not present or configured */
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#define _MC_FPFMT_387 0x10001
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#define _MC_FPFMT_XMM 0x10002
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int mc_fpformat;
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#define _MC_FPOWNED_NONE 0x20000 /* FP state not used */
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#define _MC_FPOWNED_FPU 0x20001 /* FP state came from FPU */
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#define _MC_FPOWNED_PCB 0x20002 /* FP state came from PCB */
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int mc_ownedfp;
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int mc_spare1[1]; /* align next field to 16 bytes */
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int mc_fpstate[128]; /* must be multiple of 16 bytes */
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int mc_spare2[8];
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} mcontext_t;
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#ifdef _KERNEL
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#ifdef COMPAT_FREEBSD4
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/* For 4.x binaries */
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struct mcontext4 {
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int mc_onstack; /* XXX - sigcontext compat. */
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int mc_gs;
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int mc_fs;
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int mc_es;
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int mc_ds;
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int mc_edi;
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int mc_esi;
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int mc_ebp;
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int mc_isp;
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int mc_ebx;
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int mc_edx;
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int mc_ecx;
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int mc_eax;
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int mc_trapno;
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int mc_err;
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int mc_eip;
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int mc_cs;
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int mc_eflags;
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int mc_esp; /* machine state */
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int mc_ss;
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int mc_fpregs[28]; /* env87 + fpacc87 + u_long */
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int __spare__[17];
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};
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#endif
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struct thread;
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void get_mcontext(struct thread *td, mcontext_t *mcp);
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int set_mcontext(struct thread *td, const mcontext_t *mcp);
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#endif
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#endif /* !_MACHINE_UCONTEXT_H_ */
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