cf98bc28d3
The syscall number is stored in the same register as the syscall return on amd64 (and possibly other architectures) and so it is impossible to recover in the signal handler after the call has returned. This small tweak delivers it in the `si_value` field of the signal, which is sufficient to catch capability violations and emulate them with a call to a more-privileged process in the signal handler. This reapplies 3a522ba1bc852c3d4660a4fa32e4a94999d09a47 with a fix for the static assertion failure on i386. Approved by: markj (mentor) Reviewed by: kib, bcr (manpages) Differential Revision: https://reviews.freebsd.org/D29185
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/* $OpenBSD: proc.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. 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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* Ralph Campbell.
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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. 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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* @(#)proc.h 8.1 (Berkeley) 6/10/93
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* JNPR: proc.h,v 1.7.2.1 2007/09/10 06:25:24 girish
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROC_H_
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#define _MACHINE_PROC_H_
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#ifdef CPU_CNMIPS
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#include <machine/octeon_cop2.h>
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#endif
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/*
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* Machine-dependent part of the proc structure.
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*/
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struct mdthread {
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int md_flags; /* machine-dependent flags */
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#if defined(__mips_n64) || defined(__mips_n32) /* PHYSADDR_64_BIT */
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uint64_t md_upte[KSTACK_PAGES]; /* ptes for mapping u pcb */
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#else
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int md_upte[KSTACK_PAGES];
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#endif
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uintptr_t md_ss_addr; /* single step address for ptrace */
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int md_ss_instr; /* single step instruction for ptrace */
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register_t md_saved_intr;
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u_int md_spinlock_count;
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/* The following is CPU dependent, but kept in for compatibility */
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int md_pc_ctrl; /* performance counter control */
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int md_pc_count; /* performance counter */
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int md_pc_spill; /* performance counter spill */
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void *md_tls;
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#ifdef CPU_CNMIPS
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struct octeon_cop2_state *md_cop2; /* kernel context */
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struct octeon_cop2_state *md_ucop2; /* userland context */
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#define COP2_OWNER_USERLAND 0x0000 /* Userland owns COP2 */
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#define COP2_OWNER_KERNEL 0x0001 /* Kernel owns COP2 */
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int md_cop2owner;
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#endif
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};
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/* md_flags */
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#define MDTD_FPUSED 0x0001 /* Process used the FPU */
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#define MDTD_COP2USED 0x0002 /* Process used the COP2 */
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struct mdproc {
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size_t md_tls_tcb_offset; /* TCB offset */
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};
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#define MAXARGS 8
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struct syscall_args {
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u_int code;
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u_int original_code;
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struct sysent *callp;
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register_t args[MAXARGS];
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};
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#ifdef __mips_n64
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#define KINFO_PROC_SIZE 1088
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#define KINFO_PROC32_SIZE 816
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#else
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#define KINFO_PROC_SIZE 816
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#endif
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#endif /* !_MACHINE_PROC_H_ */
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