2c66cccab7
the kernel on amd64. Fill and read segment registers for mcontext and signals. Handle traps caused by restoration of the invalidated selectors. Implement user-mode creation and manipulation of the process-specific LDT descriptors for amd64, see sysarch(2). Implement support for TSS i/o port access permission bitmap for amd64. Context-switch LDT and TSS. Do not save and restore segment registers on the context switch, that is handled by kernel enter/leave trampolines now. Remove segment restore code from the signal trampolines for freebsd/amd64, freebsd/ia32 and linux/i386 for the same reason. Implement amd64-specific compat shims for sysarch. Linuxolator (temporary ?) switched to use gsbase for thread_area pointer. TODO: Currently, gdb is not adapted to show segment registers from struct reg. Also, no machine-depended ptrace command is added to set segment registers for debugged process. In collaboration with: pho Discussed with: peter Reviewed by: jhb Linuxolator tested by: dchagin
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*-
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* Copyright (c) 1993 The Regents of the University of California.
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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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* 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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* 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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* $FreeBSD$
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*/
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/*
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* Architecture specific syscalls (AMD64)
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*/
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#ifndef _MACHINE_SYSARCH_H_
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#define _MACHINE_SYSARCH_H_
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#define I386_GET_LDT 0
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#define I386_SET_LDT 1
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#define LDT_AUTO_ALLOC 0xffffffff
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/* I386_IOPL */
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#define I386_GET_IOPERM 3
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#define I386_SET_IOPERM 4
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/* XXX Not implementable #define I386_VM86 6 */
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#define I386_GET_FSBASE 7
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#define I386_SET_FSBASE 8
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#define I386_GET_GSBASE 9
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#define I386_SET_GSBASE 10
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/* Leave space for 0-127 for to avoid translating syscalls */
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#define AMD64_GET_FSBASE 128
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#define AMD64_SET_FSBASE 129
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#define AMD64_GET_GSBASE 130
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#define AMD64_SET_GSBASE 131
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struct i386_ldt_args {
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unsigned int start;
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struct user_segment_descriptor *descs __packed;
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unsigned int num;
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};
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struct i386_ioperm_args {
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unsigned int start;
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unsigned int length;
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int enable;
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};
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int amd64_get_fsbase(void **);
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int amd64_get_gsbase(void **);
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int amd64_set_fsbase(void *);
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int amd64_set_gsbase(void *);
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int sysarch(int, void *);
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__END_DECLS
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#else
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struct thread;
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union descriptor;
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int amd64_get_ldt(struct thread *, struct i386_ldt_args *);
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int amd64_set_ldt(struct thread *, struct i386_ldt_args *,
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struct user_segment_descriptor *);
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int amd64_get_ioperm(struct thread *, struct i386_ioperm_args *);
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int amd64_set_ioperm(struct thread *, struct i386_ioperm_args *);
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#endif
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#endif /* !_MACHINE_SYSARCH_H_ */
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