2ee8325f42
ABIs: - Store the FPU initial control word in the pcb for each thread. - When first using the FPU, load the initial control word after restoring the clean state if it is not the standard control word. - Provide a correct control word for Linux/i386 binaries under FreeBSD/amd64. - Adjust the control word returned for fpugetregs()/npxgetregs() when a thread hasn't used the FPU yet to reflect the real initial control word for the current ABI. - The Linux/i386 ABI for FreeBSD/i386 now properly sets the right control word instead of trashing whatever the current state of the FPU is. Reviewed by: bde
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*-
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* Copyright (c) 2006 Roman Divacky
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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 _LINUX_MISC_H_
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#define _LINUX_MISC_H_
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/* defines for prctl */
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#define LINUX_PR_SET_PDEATHSIG 1 /* Second arg is a signal. */
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#define LINUX_PR_GET_PDEATHSIG 2 /*
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* Second arg is a ptr to return the
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* signal.
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*/
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#define LINUX_PR_SET_NAME 15 /* Set process name. */
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#define LINUX_PR_GET_NAME 16 /* Get process name. */
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#define LINUX_MAX_COMM_LEN 16 /* Maximum length of the process name. */
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#define LINUX_MREMAP_MAYMOVE 1
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#define LINUX_MREMAP_FIXED 2
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extern const char *linux_platform;
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/*
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* Non-standard aux entry types used in Linux ELF binaries.
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*/
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#define LINUX_AT_PLATFORM 15 /* String identifying CPU */
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#define LINUX_AT_HWCAP 16 /* CPU capabilities */
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#define LINUX_AT_CLKTCK 17 /* frequency at which times() increments */
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#define LINUX_AT_SECURE 23 /* secure mode boolean */
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#define LINUX_AT_BASE_PLATFORM 24 /* string identifying real platform, may
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* differ from AT_PLATFORM.
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*/
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#define LINUX_AT_EXECFN 31 /* filename of program */
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/* Linux sets the i387 to extended precision. */
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#if defined(__i386__) || defined(__amd64__)
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#define __LINUX_NPXCW__ 0x37f
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#endif
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#endif /* _LINUX_MISC_H_ */
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