1 |
1275 |
phoenix |
/*
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2 |
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* IA32 Architecture-specific signal handling support.
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3 |
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*
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4 |
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* Copyright (C) 1999, 2001 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
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* Copyright (C) 2000 VA Linux Co
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* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
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*
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* Derived from i386 and Alpha versions.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/personality.h>
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17 |
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#include <linux/ptrace.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/wait.h>
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#include <asm/uaccess.h>
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27 |
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#include <asm/rse.h>
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#include <asm/sigcontext.h>
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#include <asm/segment.h>
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#include <asm/ia32.h>
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32 |
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#include "../kernel/sigframe.h"
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33 |
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34 |
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#define A(__x) ((unsigned long)(__x))
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35 |
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36 |
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#define DEBUG_SIG 0
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37 |
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#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
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38 |
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39 |
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#define __IA32_NR_sigreturn 119
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40 |
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#define __IA32_NR_rt_sigreturn 173
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41 |
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42 |
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register double f16 asm ("f16"); register double f17 asm ("f17");
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43 |
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register double f18 asm ("f18"); register double f19 asm ("f19");
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44 |
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register double f20 asm ("f20"); register double f21 asm ("f21");
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45 |
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register double f22 asm ("f22"); register double f23 asm ("f23");
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46 |
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47 |
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register double f24 asm ("f24"); register double f25 asm ("f25");
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48 |
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register double f26 asm ("f26"); register double f27 asm ("f27");
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49 |
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register double f28 asm ("f28"); register double f29 asm ("f29");
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register double f30 asm ("f30"); register double f31 asm ("f31");
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52 |
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struct sigframe_ia32
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{
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int pretcode;
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int sig;
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struct sigcontext_ia32 sc;
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57 |
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struct _fpstate_ia32 fpstate;
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58 |
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unsigned int extramask[_IA32_NSIG_WORDS-1];
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59 |
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char retcode[8];
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60 |
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};
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struct rt_sigframe_ia32
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{
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64 |
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int pretcode;
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int sig;
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66 |
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int pinfo;
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67 |
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int puc;
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68 |
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siginfo_t32 info;
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struct ucontext_ia32 uc;
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struct _fpstate_ia32 fpstate;
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71 |
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char retcode[8];
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};
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int
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copy_siginfo_from_user32 (siginfo_t *to, siginfo_t32 *from)
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{
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unsigned long tmp;
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int err;
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if (!access_ok(VERIFY_READ, from, sizeof(siginfo_t32)))
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return -EFAULT;
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err = __get_user(to->si_signo, &from->si_signo);
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err |= __get_user(to->si_errno, &from->si_errno);
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err |= __get_user(to->si_code, &from->si_code);
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if (from->si_code < 0)
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err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
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else {
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90 |
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switch (from->si_code >> 16) {
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case __SI_CHLD >> 16:
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err |= __get_user(to->si_utime, &from->si_utime);
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err |= __get_user(to->si_stime, &from->si_stime);
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err |= __get_user(to->si_status, &from->si_status);
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default:
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err |= __get_user(to->si_pid, &from->si_pid);
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err |= __get_user(to->si_uid, &from->si_uid);
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break;
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case __SI_FAULT >> 16:
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err |= __get_user(tmp, &from->si_addr);
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to->si_addr = (void *) tmp;
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break;
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case __SI_POLL >> 16:
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err |= __get_user(to->si_band, &from->si_band);
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err |= __get_user(to->si_fd, &from->si_fd);
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break;
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/* case __SI_RT: This is not generated by the kernel as of now. */
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}
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}
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return err;
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}
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int
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copy_siginfo_to_user32 (siginfo_t32 *to, siginfo_t *from)
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{
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int err;
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if (!access_ok(VERIFY_WRITE, to, sizeof(siginfo_t32)))
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return -EFAULT;
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/* If you change siginfo_t structure, please be sure
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this code is fixed accordingly.
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It should never copy any pad contained in the structure
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to avoid security leaks, but must copy the generic
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3 ints plus the relevant union member.
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This routine must convert siginfo from 64bit to 32bit as well
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at the same time. */
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err = __put_user(from->si_signo, &to->si_signo);
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err |= __put_user(from->si_errno, &to->si_errno);
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err |= __put_user((short)from->si_code, &to->si_code);
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if (from->si_code < 0)
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err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
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else {
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switch (from->si_code >> 16) {
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case __SI_CHLD >> 16:
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err |= __put_user(from->si_utime, &to->si_utime);
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err |= __put_user(from->si_stime, &to->si_stime);
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err |= __put_user(from->si_status, &to->si_status);
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default:
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err |= __put_user(from->si_pid, &to->si_pid);
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err |= __put_user(from->si_uid, &to->si_uid);
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break;
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case __SI_FAULT >> 16:
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err |= __put_user((long)from->si_addr, &to->si_addr);
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break;
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case __SI_POLL >> 16:
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err |= __put_user(from->si_band, &to->si_band);
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err |= __put_user(from->si_fd, &to->si_fd);
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break;
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/* case __SI_RT: This is not generated by the kernel as of now. */
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}
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}
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return err;
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}
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157 |
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/*
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* SAVE and RESTORE of ia32 fpstate info, from ia64 current state
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* Used in exception handler to pass the fpstate to the user, and restore
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* the fpstate while returning from the exception handler.
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*
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* fpstate info and their mapping to IA64 regs:
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* fpstate REG(BITS) Attribute Comments
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* cw ar.fcr(0:12) with bits 7 and 6 not used
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* sw ar.fsr(0:15)
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* tag ar.fsr(16:31) with odd numbered bits not used
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* (read returns 0, writes ignored)
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* ipoff ar.fir(0:31)
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* cssel ar.fir(32:47)
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* dataoff ar.fdr(0:31)
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* datasel ar.fdr(32:47)
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*
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* _st[(0+TOS)%8] f8
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* _st[(1+TOS)%8] f9
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* _st[(2+TOS)%8] f10
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* _st[(3+TOS)%8] f11 (f8..f11 from ptregs)
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* : : : (f12..f15 from live reg)
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* : : :
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* _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13)
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*
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* status Same as sw RO
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* magic 0 as X86_FXSR_MAGIC in ia32
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* mxcsr Bits(7:15)=ar.fcr(39:47)
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* Bits(0:5) =ar.fsr(32:37) with bit 6 reserved
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* _xmm[0..7] f16..f31 (live registers)
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* with _xmm[0]
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* Bit(64:127)=f17(0:63)
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* Bit(0:63)=f16(0:63)
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* All other fields unused...
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*/
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#define __ldfe(regnum, x) \
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({ \
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register double __f__ asm ("f"#regnum); \
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__asm__ __volatile__ ("ldfe %0=[%1] ;;" :"=f"(__f__): "r"(x)); \
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})
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198 |
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#define __ldf8(regnum, x) \
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({ \
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register double __f__ asm ("f"#regnum); \
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__asm__ __volatile__ ("ldf8 %0=[%1] ;;" :"=f"(__f__): "r"(x)); \
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})
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204 |
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#define __stfe(x, regnum) \
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({ \
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register double __f__ asm ("f"#regnum); \
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__asm__ __volatile__ ("stfe [%0]=%1" :: "r"(x), "f"(__f__) : "memory"); \
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})
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210 |
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#define __stf8(x, regnum) \
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({ \
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register double __f__ asm ("f"#regnum); \
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__asm__ __volatile__ ("stf8 [%0]=%1" :: "r"(x), "f"(__f__) : "memory"); \
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})
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215 |
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216 |
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static int
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save_ia32_fpstate_live (struct _fpstate_ia32 *save)
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{
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219 |
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struct task_struct *tsk = current;
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struct pt_regs *ptp;
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struct _fpreg_ia32 *fpregp;
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char buf[32];
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unsigned long fsr, fcr, fir, fdr;
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224 |
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unsigned long new_fsr;
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225 |
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unsigned long num128[2];
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226 |
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unsigned long mxcsr=0;
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227 |
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int fp_tos, fr8_st_map;
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228 |
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229 |
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if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
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230 |
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return -EFAULT;
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231 |
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232 |
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/* Readin fsr, fcr, fir, fdr and copy onto fpstate */
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233 |
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asm volatile ( "mov %0=ar.fsr;" : "=r"(fsr));
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234 |
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asm volatile ( "mov %0=ar.fcr;" : "=r"(fcr));
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235 |
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asm volatile ( "mov %0=ar.fir;" : "=r"(fir));
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236 |
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asm volatile ( "mov %0=ar.fdr;" : "=r"(fdr));
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237 |
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/*
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238 |
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* We need to clear the exception state before calling the signal handler. Clear
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239 |
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* the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
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240 |
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* instruction.
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241 |
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*/
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242 |
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new_fsr = fsr & ~0x80ff;
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243 |
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asm volatile ( "mov ar.fsr=%0;" :: "r"(new_fsr));
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244 |
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245 |
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__put_user(fcr & 0xffff, &save->cw);
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246 |
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__put_user(fsr & 0xffff, &save->sw);
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247 |
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__put_user((fsr>>16) & 0xffff, &save->tag);
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248 |
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__put_user(fir, &save->ipoff);
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249 |
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__put_user((fir>>32) & 0xffff, &save->cssel);
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250 |
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__put_user(fdr, &save->dataoff);
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251 |
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__put_user((fdr>>32) & 0xffff, &save->datasel);
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252 |
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__put_user(fsr & 0xffff, &save->status);
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253 |
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254 |
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mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
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255 |
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__put_user(mxcsr & 0xffff, &save->mxcsr);
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256 |
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__put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000
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257 |
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|
258 |
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/*
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259 |
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* save f8..f11 from pt_regs
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260 |
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* save f12..f15 from live register set
|
261 |
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*/
|
262 |
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/*
|
263 |
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* Find the location where f8 has to go in fp reg stack. This depends on
|
264 |
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* TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
|
265 |
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* to.
|
266 |
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*/
|
267 |
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fp_tos = (fsr>>11)&0x7;
|
268 |
|
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fr8_st_map = (8-fp_tos)&0x7;
|
269 |
|
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ptp = ia64_task_regs(tsk);
|
270 |
|
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fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
|
271 |
|
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ia64f2ia32f(fpregp, &ptp->f8);
|
272 |
|
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copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
273 |
|
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ia64f2ia32f(fpregp, &ptp->f9);
|
274 |
|
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copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
275 |
|
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ia64f2ia32f(fpregp, &ptp->f10);
|
276 |
|
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copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
277 |
|
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ia64f2ia32f(fpregp, &ptp->f11);
|
278 |
|
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copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
279 |
|
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|
280 |
|
|
__stfe(fpregp, 12);
|
281 |
|
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copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
282 |
|
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__stfe(fpregp, 13);
|
283 |
|
|
copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
284 |
|
|
__stfe(fpregp, 14);
|
285 |
|
|
copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
286 |
|
|
__stfe(fpregp, 15);
|
287 |
|
|
copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
|
288 |
|
|
|
289 |
|
|
__stf8(&num128[0], 16);
|
290 |
|
|
__stf8(&num128[1], 17);
|
291 |
|
|
copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
|
292 |
|
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|
293 |
|
|
__stf8(&num128[0], 18);
|
294 |
|
|
__stf8(&num128[1], 19);
|
295 |
|
|
copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
|
296 |
|
|
|
297 |
|
|
__stf8(&num128[0], 20);
|
298 |
|
|
__stf8(&num128[1], 21);
|
299 |
|
|
copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
|
300 |
|
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|
301 |
|
|
__stf8(&num128[0], 22);
|
302 |
|
|
__stf8(&num128[1], 23);
|
303 |
|
|
copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
|
304 |
|
|
|
305 |
|
|
__stf8(&num128[0], 24);
|
306 |
|
|
__stf8(&num128[1], 25);
|
307 |
|
|
copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
|
308 |
|
|
|
309 |
|
|
__stf8(&num128[0], 26);
|
310 |
|
|
__stf8(&num128[1], 27);
|
311 |
|
|
copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
|
312 |
|
|
|
313 |
|
|
__stf8(&num128[0], 28);
|
314 |
|
|
__stf8(&num128[1], 29);
|
315 |
|
|
copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
|
316 |
|
|
|
317 |
|
|
__stf8(&num128[0], 30);
|
318 |
|
|
__stf8(&num128[1], 31);
|
319 |
|
|
copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
|
320 |
|
|
return 0;
|
321 |
|
|
}
|
322 |
|
|
|
323 |
|
|
static int
|
324 |
|
|
restore_ia32_fpstate_live (struct _fpstate_ia32 *save)
|
325 |
|
|
{
|
326 |
|
|
struct task_struct *tsk = current;
|
327 |
|
|
struct pt_regs *ptp;
|
328 |
|
|
unsigned int lo, hi;
|
329 |
|
|
unsigned long num128[2];
|
330 |
|
|
unsigned long num64, mxcsr;
|
331 |
|
|
struct _fpreg_ia32 *fpregp;
|
332 |
|
|
char buf[32];
|
333 |
|
|
unsigned long fsr, fcr, fir, fdr;
|
334 |
|
|
int fp_tos, fr8_st_map;
|
335 |
|
|
|
336 |
|
|
if (!access_ok(VERIFY_READ, save, sizeof(*save)))
|
337 |
|
|
return(-EFAULT);
|
338 |
|
|
|
339 |
|
|
/*
|
340 |
|
|
* Updating fsr, fcr, fir, fdr.
|
341 |
|
|
* Just a bit more complicated than save.
|
342 |
|
|
* - Need to make sure that we dont write any value other than the
|
343 |
|
|
* specific fpstate info
|
344 |
|
|
* - Need to make sure that the untouched part of frs, fdr, fir, fcr
|
345 |
|
|
* should remain same while writing.
|
346 |
|
|
* So, we do a read, change specific fields and write.
|
347 |
|
|
*/
|
348 |
|
|
asm volatile ( "mov %0=ar.fsr;" : "=r"(fsr));
|
349 |
|
|
asm volatile ( "mov %0=ar.fcr;" : "=r"(fcr));
|
350 |
|
|
asm volatile ( "mov %0=ar.fir;" : "=r"(fir));
|
351 |
|
|
asm volatile ( "mov %0=ar.fdr;" : "=r"(fdr));
|
352 |
|
|
|
353 |
|
|
__get_user(mxcsr, (unsigned int *)&save->mxcsr);
|
354 |
|
|
/* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
|
355 |
|
|
__get_user(lo, (unsigned int *)&save->cw);
|
356 |
|
|
num64 = mxcsr & 0xff10;
|
357 |
|
|
num64 = (num64 << 32) | (lo & 0x1f3f);
|
358 |
|
|
fcr = (fcr & (~0xff1000001f3f)) | num64;
|
359 |
|
|
|
360 |
|
|
/* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
|
361 |
|
|
__get_user(lo, (unsigned int *)&save->sw);
|
362 |
|
|
/* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
|
363 |
|
|
if ( !(lo & 0x7f) )
|
364 |
|
|
lo &= (~0x8080);
|
365 |
|
|
__get_user(hi, (unsigned int *)&save->tag);
|
366 |
|
|
num64 = mxcsr & 0x3f;
|
367 |
|
|
num64 = (num64 << 16) | (hi & 0xffff);
|
368 |
|
|
num64 = (num64 << 16) | (lo & 0xffff);
|
369 |
|
|
fsr = (fsr & (~0x3fffffffff)) | num64;
|
370 |
|
|
|
371 |
|
|
/* setting bits 0..47 with cssel and ipoff */
|
372 |
|
|
__get_user(lo, (unsigned int *)&save->ipoff);
|
373 |
|
|
__get_user(hi, (unsigned int *)&save->cssel);
|
374 |
|
|
num64 = hi & 0xffff;
|
375 |
|
|
num64 = (num64 << 32) | lo;
|
376 |
|
|
fir = (fir & (~0xffffffffffff)) | num64;
|
377 |
|
|
|
378 |
|
|
/* setting bits 0..47 with datasel and dataoff */
|
379 |
|
|
__get_user(lo, (unsigned int *)&save->dataoff);
|
380 |
|
|
__get_user(hi, (unsigned int *)&save->datasel);
|
381 |
|
|
num64 = hi & 0xffff;
|
382 |
|
|
num64 = (num64 << 32) | lo;
|
383 |
|
|
fdr = (fdr & (~0xffffffffffff)) | num64;
|
384 |
|
|
|
385 |
|
|
asm volatile ( "mov ar.fsr=%0;" :: "r"(fsr));
|
386 |
|
|
asm volatile ( "mov ar.fcr=%0;" :: "r"(fcr));
|
387 |
|
|
asm volatile ( "mov ar.fir=%0;" :: "r"(fir));
|
388 |
|
|
asm volatile ( "mov ar.fdr=%0;" :: "r"(fdr));
|
389 |
|
|
|
390 |
|
|
/*
|
391 |
|
|
* restore f8..f11 onto pt_regs
|
392 |
|
|
* restore f12..f15 onto live registers
|
393 |
|
|
*/
|
394 |
|
|
/*
|
395 |
|
|
* Find the location where f8 has to go in fp reg stack. This depends on
|
396 |
|
|
* TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
|
397 |
|
|
* to.
|
398 |
|
|
*/
|
399 |
|
|
fp_tos = (fsr>>11)&0x7;
|
400 |
|
|
fr8_st_map = (8-fp_tos)&0x7;
|
401 |
|
|
fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
|
402 |
|
|
|
403 |
|
|
ptp = ia64_task_regs(tsk);
|
404 |
|
|
copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
405 |
|
|
ia32f2ia64f(&ptp->f8, fpregp);
|
406 |
|
|
copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
407 |
|
|
ia32f2ia64f(&ptp->f9, fpregp);
|
408 |
|
|
copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
409 |
|
|
ia32f2ia64f(&ptp->f10, fpregp);
|
410 |
|
|
copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
411 |
|
|
ia32f2ia64f(&ptp->f11, fpregp);
|
412 |
|
|
|
413 |
|
|
copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
414 |
|
|
__ldfe(12, fpregp);
|
415 |
|
|
copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
416 |
|
|
__ldfe(13, fpregp);
|
417 |
|
|
copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
418 |
|
|
__ldfe(14, fpregp);
|
419 |
|
|
copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
|
420 |
|
|
__ldfe(15, fpregp);
|
421 |
|
|
|
422 |
|
|
copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
|
423 |
|
|
__ldf8(16, &num128[0]);
|
424 |
|
|
__ldf8(17, &num128[1]);
|
425 |
|
|
|
426 |
|
|
copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
|
427 |
|
|
__ldf8(18, &num128[0]);
|
428 |
|
|
__ldf8(19, &num128[1]);
|
429 |
|
|
|
430 |
|
|
copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
|
431 |
|
|
__ldf8(20, &num128[0]);
|
432 |
|
|
__ldf8(21, &num128[1]);
|
433 |
|
|
|
434 |
|
|
copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
|
435 |
|
|
__ldf8(22, &num128[0]);
|
436 |
|
|
__ldf8(23, &num128[1]);
|
437 |
|
|
|
438 |
|
|
copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
|
439 |
|
|
__ldf8(24, &num128[0]);
|
440 |
|
|
__ldf8(25, &num128[1]);
|
441 |
|
|
|
442 |
|
|
copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
|
443 |
|
|
__ldf8(26, &num128[0]);
|
444 |
|
|
__ldf8(27, &num128[1]);
|
445 |
|
|
|
446 |
|
|
copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
|
447 |
|
|
__ldf8(28, &num128[0]);
|
448 |
|
|
__ldf8(29, &num128[1]);
|
449 |
|
|
|
450 |
|
|
copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
|
451 |
|
|
__ldf8(30, &num128[0]);
|
452 |
|
|
__ldf8(31, &num128[1]);
|
453 |
|
|
return 0;
|
454 |
|
|
}
|
455 |
|
|
|
456 |
|
|
static inline void
|
457 |
|
|
sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
|
458 |
|
|
{
|
459 |
|
|
if (handler + 1 <= 2)
|
460 |
|
|
/* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
|
461 |
|
|
sa->sa.sa_handler = (__sighandler_t) A((int) handler);
|
462 |
|
|
else
|
463 |
|
|
sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
|
464 |
|
|
}
|
465 |
|
|
|
466 |
|
|
asmlinkage long
|
467 |
|
|
ia32_rt_sigsuspend (sigset32_t *uset, unsigned int sigsetsize, struct sigscratch *scr)
|
468 |
|
|
{
|
469 |
|
|
extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
|
470 |
|
|
sigset_t oldset, set;
|
471 |
|
|
|
472 |
|
|
scr->scratch_unat = 0; /* avoid leaking kernel bits to user level */
|
473 |
|
|
memset(&set, 0, sizeof(&set));
|
474 |
|
|
|
475 |
|
|
if (sigsetsize > sizeof(sigset_t))
|
476 |
|
|
return -EINVAL;
|
477 |
|
|
|
478 |
|
|
if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
|
479 |
|
|
return -EFAULT;
|
480 |
|
|
|
481 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
482 |
|
|
|
483 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
484 |
|
|
{
|
485 |
|
|
oldset = current->blocked;
|
486 |
|
|
current->blocked = set;
|
487 |
|
|
recalc_sigpending(current);
|
488 |
|
|
}
|
489 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
490 |
|
|
|
491 |
|
|
/*
|
492 |
|
|
* The return below usually returns to the signal handler. We need to pre-set the
|
493 |
|
|
* correct error code here to ensure that the right values get saved in sigcontext
|
494 |
|
|
* by ia64_do_signal.
|
495 |
|
|
*/
|
496 |
|
|
scr->pt.r8 = -EINTR;
|
497 |
|
|
while (1) {
|
498 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
499 |
|
|
schedule();
|
500 |
|
|
if (ia64_do_signal(&oldset, scr, 1))
|
501 |
|
|
return -EINTR;
|
502 |
|
|
}
|
503 |
|
|
}
|
504 |
|
|
|
505 |
|
|
asmlinkage long
|
506 |
|
|
ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
|
507 |
|
|
{
|
508 |
|
|
return ia32_rt_sigsuspend((sigset32_t *)&mask, sizeof(mask), scr);
|
509 |
|
|
}
|
510 |
|
|
|
511 |
|
|
asmlinkage long
|
512 |
|
|
sys32_signal (int sig, unsigned int handler)
|
513 |
|
|
{
|
514 |
|
|
struct k_sigaction new_sa, old_sa;
|
515 |
|
|
int ret;
|
516 |
|
|
|
517 |
|
|
sigact_set_handler(&new_sa, handler, 0);
|
518 |
|
|
new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
|
519 |
|
|
|
520 |
|
|
ret = do_sigaction(sig, &new_sa, &old_sa);
|
521 |
|
|
|
522 |
|
|
return ret ? ret : IA32_SA_HANDLER(&old_sa);
|
523 |
|
|
}
|
524 |
|
|
|
525 |
|
|
asmlinkage long
|
526 |
|
|
sys32_rt_sigaction (int sig, struct sigaction32 *act,
|
527 |
|
|
struct sigaction32 *oact, unsigned int sigsetsize)
|
528 |
|
|
{
|
529 |
|
|
struct k_sigaction new_ka, old_ka;
|
530 |
|
|
unsigned int handler, restorer;
|
531 |
|
|
int ret;
|
532 |
|
|
|
533 |
|
|
/* XXX: Don't preclude handling different sized sigset_t's. */
|
534 |
|
|
if (sigsetsize != sizeof(sigset32_t))
|
535 |
|
|
return -EINVAL;
|
536 |
|
|
|
537 |
|
|
if (act) {
|
538 |
|
|
ret = get_user(handler, &act->sa_handler);
|
539 |
|
|
ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
540 |
|
|
ret |= get_user(restorer, &act->sa_restorer);
|
541 |
|
|
ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(sigset32_t));
|
542 |
|
|
if (ret)
|
543 |
|
|
return -EFAULT;
|
544 |
|
|
|
545 |
|
|
sigact_set_handler(&new_ka, handler, restorer);
|
546 |
|
|
}
|
547 |
|
|
|
548 |
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
549 |
|
|
|
550 |
|
|
if (!ret && oact) {
|
551 |
|
|
ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
|
552 |
|
|
ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
553 |
|
|
ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
|
554 |
|
|
ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(sigset32_t));
|
555 |
|
|
}
|
556 |
|
|
return ret;
|
557 |
|
|
}
|
558 |
|
|
|
559 |
|
|
|
560 |
|
|
extern asmlinkage long sys_rt_sigprocmask (int how, sigset_t *set, sigset_t *oset,
|
561 |
|
|
size_t sigsetsize);
|
562 |
|
|
|
563 |
|
|
asmlinkage long
|
564 |
|
|
sys32_rt_sigprocmask (int how, sigset32_t *set, sigset32_t *oset, unsigned int sigsetsize)
|
565 |
|
|
{
|
566 |
|
|
mm_segment_t old_fs = get_fs();
|
567 |
|
|
sigset_t s;
|
568 |
|
|
long ret;
|
569 |
|
|
|
570 |
|
|
if (sigsetsize > sizeof(s))
|
571 |
|
|
return -EINVAL;
|
572 |
|
|
|
573 |
|
|
if (set) {
|
574 |
|
|
memset(&s, 0, sizeof(s));
|
575 |
|
|
if (copy_from_user(&s.sig, set, sigsetsize))
|
576 |
|
|
return -EFAULT;
|
577 |
|
|
}
|
578 |
|
|
set_fs(KERNEL_DS);
|
579 |
|
|
ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL, sizeof(s));
|
580 |
|
|
set_fs(old_fs);
|
581 |
|
|
if (ret)
|
582 |
|
|
return ret;
|
583 |
|
|
if (oset) {
|
584 |
|
|
if (copy_to_user(oset, &s.sig, sigsetsize))
|
585 |
|
|
return -EFAULT;
|
586 |
|
|
}
|
587 |
|
|
return 0;
|
588 |
|
|
}
|
589 |
|
|
|
590 |
|
|
asmlinkage long
|
591 |
|
|
sys32_sigprocmask (int how, unsigned int *set, unsigned int *oset)
|
592 |
|
|
{
|
593 |
|
|
return sys32_rt_sigprocmask(how, (sigset32_t *) set, (sigset32_t *) oset, sizeof(*set));
|
594 |
|
|
}
|
595 |
|
|
|
596 |
|
|
asmlinkage long
|
597 |
|
|
sys32_rt_sigtimedwait (sigset32_t *uthese, siginfo_t32 *uinfo, struct timespec32 *uts,
|
598 |
|
|
unsigned int sigsetsize)
|
599 |
|
|
{
|
600 |
|
|
extern asmlinkage long sys_rt_sigtimedwait (const sigset_t *, siginfo_t *,
|
601 |
|
|
const struct timespec *, size_t);
|
602 |
|
|
extern int copy_siginfo_to_user32 (siginfo_t32 *, siginfo_t *);
|
603 |
|
|
mm_segment_t old_fs = get_fs();
|
604 |
|
|
struct timespec t;
|
605 |
|
|
siginfo_t info;
|
606 |
|
|
sigset_t s;
|
607 |
|
|
int ret;
|
608 |
|
|
|
609 |
|
|
if (copy_from_user(&s.sig, uthese, sizeof(sigset32_t)))
|
610 |
|
|
return -EFAULT;
|
611 |
|
|
if (uts) {
|
612 |
|
|
ret = get_user(t.tv_sec, &uts->tv_sec);
|
613 |
|
|
ret |= get_user(t.tv_nsec, &uts->tv_nsec);
|
614 |
|
|
if (ret)
|
615 |
|
|
return -EFAULT;
|
616 |
|
|
}
|
617 |
|
|
set_fs(KERNEL_DS);
|
618 |
|
|
ret = sys_rt_sigtimedwait(&s, uinfo ? &info : NULL, uts ? &t : NULL, sigsetsize);
|
619 |
|
|
set_fs(old_fs);
|
620 |
|
|
if (ret >= 0 && uinfo) {
|
621 |
|
|
if (copy_siginfo_to_user32(uinfo, &info))
|
622 |
|
|
return -EFAULT;
|
623 |
|
|
}
|
624 |
|
|
return ret;
|
625 |
|
|
}
|
626 |
|
|
|
627 |
|
|
asmlinkage long
|
628 |
|
|
sys32_rt_sigqueueinfo (int pid, int sig, siginfo_t32 *uinfo)
|
629 |
|
|
{
|
630 |
|
|
extern asmlinkage long sys_rt_sigqueueinfo (int, int, siginfo_t *);
|
631 |
|
|
extern int copy_siginfo_from_user32 (siginfo_t *to, siginfo_t32 *from);
|
632 |
|
|
mm_segment_t old_fs = get_fs();
|
633 |
|
|
siginfo_t info;
|
634 |
|
|
int ret;
|
635 |
|
|
|
636 |
|
|
if (copy_siginfo_from_user32(&info, uinfo))
|
637 |
|
|
return -EFAULT;
|
638 |
|
|
set_fs(KERNEL_DS);
|
639 |
|
|
ret = sys_rt_sigqueueinfo(pid, sig, &info);
|
640 |
|
|
set_fs(old_fs);
|
641 |
|
|
return ret;
|
642 |
|
|
}
|
643 |
|
|
|
644 |
|
|
asmlinkage long
|
645 |
|
|
sys32_sigaction (int sig, struct old_sigaction32 *act, struct old_sigaction32 *oact)
|
646 |
|
|
{
|
647 |
|
|
struct k_sigaction new_ka, old_ka;
|
648 |
|
|
unsigned int handler, restorer;
|
649 |
|
|
int ret;
|
650 |
|
|
|
651 |
|
|
if (act) {
|
652 |
|
|
old_sigset32_t mask;
|
653 |
|
|
|
654 |
|
|
ret = get_user(handler, &act->sa_handler);
|
655 |
|
|
ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
656 |
|
|
ret |= get_user(restorer, &act->sa_restorer);
|
657 |
|
|
ret |= get_user(mask, &act->sa_mask);
|
658 |
|
|
if (ret)
|
659 |
|
|
return ret;
|
660 |
|
|
|
661 |
|
|
sigact_set_handler(&new_ka, handler, restorer);
|
662 |
|
|
siginitset(&new_ka.sa.sa_mask, mask);
|
663 |
|
|
}
|
664 |
|
|
|
665 |
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
666 |
|
|
|
667 |
|
|
if (!ret && oact) {
|
668 |
|
|
ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
|
669 |
|
|
ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
670 |
|
|
ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
|
671 |
|
|
ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
|
672 |
|
|
}
|
673 |
|
|
|
674 |
|
|
return ret;
|
675 |
|
|
}
|
676 |
|
|
|
677 |
|
|
static int
|
678 |
|
|
setup_sigcontext_ia32 (struct sigcontext_ia32 *sc, struct _fpstate_ia32 *fpstate,
|
679 |
|
|
struct pt_regs *regs, unsigned long mask)
|
680 |
|
|
{
|
681 |
|
|
int err = 0;
|
682 |
|
|
unsigned long flag;
|
683 |
|
|
|
684 |
|
|
if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc)))
|
685 |
|
|
return -EFAULT;
|
686 |
|
|
|
687 |
|
|
err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int *)&sc->fs);
|
688 |
|
|
err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int *)&sc->gs);
|
689 |
|
|
err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int *)&sc->es);
|
690 |
|
|
err |= __put_user(regs->r16 & 0xffff, (unsigned int *)&sc->ds);
|
691 |
|
|
err |= __put_user(regs->r15, &sc->edi);
|
692 |
|
|
err |= __put_user(regs->r14, &sc->esi);
|
693 |
|
|
err |= __put_user(regs->r13, &sc->ebp);
|
694 |
|
|
err |= __put_user(regs->r12, &sc->esp);
|
695 |
|
|
err |= __put_user(regs->r11, &sc->ebx);
|
696 |
|
|
err |= __put_user(regs->r10, &sc->edx);
|
697 |
|
|
err |= __put_user(regs->r9, &sc->ecx);
|
698 |
|
|
err |= __put_user(regs->r8, &sc->eax);
|
699 |
|
|
#if 0
|
700 |
|
|
err |= __put_user(current->tss.trap_no, &sc->trapno);
|
701 |
|
|
err |= __put_user(current->tss.error_code, &sc->err);
|
702 |
|
|
#endif
|
703 |
|
|
err |= __put_user(regs->cr_iip, &sc->eip);
|
704 |
|
|
err |= __put_user(regs->r17 & 0xffff, (unsigned int *)&sc->cs);
|
705 |
|
|
/*
|
706 |
|
|
* `eflags' is in an ar register for this context
|
707 |
|
|
*/
|
708 |
|
|
asm volatile ("mov %0=ar.eflag ;;" : "=r"(flag));
|
709 |
|
|
err |= __put_user((unsigned int)flag, &sc->eflags);
|
710 |
|
|
err |= __put_user(regs->r12, &sc->esp_at_signal);
|
711 |
|
|
err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int *)&sc->ss);
|
712 |
|
|
|
713 |
|
|
if ( save_ia32_fpstate_live(fpstate) < 0 )
|
714 |
|
|
err = -EFAULT;
|
715 |
|
|
else
|
716 |
|
|
err |= __put_user((u32)(u64)fpstate, &sc->fpstate);
|
717 |
|
|
|
718 |
|
|
#if 0
|
719 |
|
|
tmp = save_i387(fpstate);
|
720 |
|
|
if (tmp < 0)
|
721 |
|
|
err = 1;
|
722 |
|
|
else
|
723 |
|
|
err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
|
724 |
|
|
|
725 |
|
|
/* non-iBCS2 extensions.. */
|
726 |
|
|
#endif
|
727 |
|
|
err |= __put_user(mask, &sc->oldmask);
|
728 |
|
|
#if 0
|
729 |
|
|
err |= __put_user(current->tss.cr2, &sc->cr2);
|
730 |
|
|
#endif
|
731 |
|
|
return err;
|
732 |
|
|
}
|
733 |
|
|
|
734 |
|
|
static int
|
735 |
|
|
restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 *sc, int *peax)
|
736 |
|
|
{
|
737 |
|
|
unsigned int err = 0;
|
738 |
|
|
|
739 |
|
|
if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
|
740 |
|
|
return(-EFAULT);
|
741 |
|
|
|
742 |
|
|
#define COPY(ia64x, ia32x) err |= __get_user(regs->ia64x, &sc->ia32x)
|
743 |
|
|
|
744 |
|
|
#define copyseg_gs(tmp) (regs->r16 |= (unsigned long) (tmp) << 48)
|
745 |
|
|
#define copyseg_fs(tmp) (regs->r16 |= (unsigned long) (tmp) << 32)
|
746 |
|
|
#define copyseg_cs(tmp) (regs->r17 |= tmp)
|
747 |
|
|
#define copyseg_ss(tmp) (regs->r17 |= (unsigned long) (tmp) << 16)
|
748 |
|
|
#define copyseg_es(tmp) (regs->r16 |= (unsigned long) (tmp) << 16)
|
749 |
|
|
#define copyseg_ds(tmp) (regs->r16 |= tmp)
|
750 |
|
|
|
751 |
|
|
#define COPY_SEG(seg) \
|
752 |
|
|
{ \
|
753 |
|
|
unsigned short tmp; \
|
754 |
|
|
err |= __get_user(tmp, &sc->seg); \
|
755 |
|
|
copyseg_##seg(tmp); \
|
756 |
|
|
}
|
757 |
|
|
#define COPY_SEG_STRICT(seg) \
|
758 |
|
|
{ \
|
759 |
|
|
unsigned short tmp; \
|
760 |
|
|
err |= __get_user(tmp, &sc->seg); \
|
761 |
|
|
copyseg_##seg(tmp|3); \
|
762 |
|
|
}
|
763 |
|
|
|
764 |
|
|
/* To make COPY_SEGs easier, we zero r16, r17 */
|
765 |
|
|
regs->r16 = 0;
|
766 |
|
|
regs->r17 = 0;
|
767 |
|
|
|
768 |
|
|
COPY_SEG(gs);
|
769 |
|
|
COPY_SEG(fs);
|
770 |
|
|
COPY_SEG(es);
|
771 |
|
|
COPY_SEG(ds);
|
772 |
|
|
COPY(r15, edi);
|
773 |
|
|
COPY(r14, esi);
|
774 |
|
|
COPY(r13, ebp);
|
775 |
|
|
COPY(r12, esp);
|
776 |
|
|
COPY(r11, ebx);
|
777 |
|
|
COPY(r10, edx);
|
778 |
|
|
COPY(r9, ecx);
|
779 |
|
|
COPY(cr_iip, eip);
|
780 |
|
|
COPY_SEG_STRICT(cs);
|
781 |
|
|
COPY_SEG_STRICT(ss);
|
782 |
|
|
ia32_load_segment_descriptors(current);
|
783 |
|
|
{
|
784 |
|
|
unsigned int tmpflags;
|
785 |
|
|
unsigned long flag;
|
786 |
|
|
|
787 |
|
|
/*
|
788 |
|
|
* IA32 `eflags' is not part of `pt_regs', it's in an ar register which
|
789 |
|
|
* is part of the thread context. Fortunately, we are executing in the
|
790 |
|
|
* IA32 process's context.
|
791 |
|
|
*/
|
792 |
|
|
err |= __get_user(tmpflags, &sc->eflags);
|
793 |
|
|
asm volatile ("mov %0=ar.eflag ;;" : "=r"(flag));
|
794 |
|
|
flag &= ~0x40DD5;
|
795 |
|
|
flag |= (tmpflags & 0x40DD5);
|
796 |
|
|
asm volatile ("mov ar.eflag=%0 ;;" :: "r"(flag));
|
797 |
|
|
|
798 |
|
|
regs->r1 = -1; /* disable syscall checks, r1 is orig_eax */
|
799 |
|
|
}
|
800 |
|
|
|
801 |
|
|
{
|
802 |
|
|
struct _fpstate_ia32 *buf = NULL;
|
803 |
|
|
u32 fpstate_ptr;
|
804 |
|
|
err |= get_user(fpstate_ptr, &(sc->fpstate));
|
805 |
|
|
buf = (struct _fpstate_ia32 *)(u64)fpstate_ptr;
|
806 |
|
|
if (buf) {
|
807 |
|
|
err |= restore_ia32_fpstate_live(buf);
|
808 |
|
|
}
|
809 |
|
|
}
|
810 |
|
|
|
811 |
|
|
#if 0
|
812 |
|
|
{
|
813 |
|
|
struct _fpstate * buf;
|
814 |
|
|
err |= __get_user(buf, &sc->fpstate);
|
815 |
|
|
if (buf) {
|
816 |
|
|
if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
|
817 |
|
|
goto badframe;
|
818 |
|
|
err |= restore_i387(buf);
|
819 |
|
|
}
|
820 |
|
|
}
|
821 |
|
|
#endif
|
822 |
|
|
|
823 |
|
|
err |= __get_user(*peax, &sc->eax);
|
824 |
|
|
return err;
|
825 |
|
|
|
826 |
|
|
#if 0
|
827 |
|
|
badframe:
|
828 |
|
|
return 1;
|
829 |
|
|
#endif
|
830 |
|
|
}
|
831 |
|
|
|
832 |
|
|
/*
|
833 |
|
|
* Determine which stack to use..
|
834 |
|
|
*/
|
835 |
|
|
static inline void *
|
836 |
|
|
get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
|
837 |
|
|
{
|
838 |
|
|
unsigned long esp;
|
839 |
|
|
|
840 |
|
|
/* Default to using normal stack (truncate off sign-extension of bit 31: */
|
841 |
|
|
esp = (unsigned int) regs->r12;
|
842 |
|
|
|
843 |
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
844 |
|
|
if (ka->sa.sa_flags & SA_ONSTACK) {
|
845 |
|
|
if (!on_sig_stack(esp))
|
846 |
|
|
esp = current->sas_ss_sp + current->sas_ss_size;
|
847 |
|
|
}
|
848 |
|
|
/* Legacy stack switching not supported */
|
849 |
|
|
|
850 |
|
|
return (void *)((esp - frame_size) & -8ul);
|
851 |
|
|
}
|
852 |
|
|
|
853 |
|
|
static int
|
854 |
|
|
setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
|
855 |
|
|
{
|
856 |
|
|
struct exec_domain *ed = current->exec_domain;
|
857 |
|
|
struct sigframe_ia32 *frame;
|
858 |
|
|
int err = 0;
|
859 |
|
|
|
860 |
|
|
frame = get_sigframe(ka, regs, sizeof(*frame));
|
861 |
|
|
|
862 |
|
|
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
|
863 |
|
|
goto give_sigsegv;
|
864 |
|
|
|
865 |
|
|
err |= __put_user((ed && ed->signal_invmap
|
866 |
|
|
&& sig < 32 ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig);
|
867 |
|
|
|
868 |
|
|
err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]);
|
869 |
|
|
|
870 |
|
|
if (_IA32_NSIG_WORDS > 1)
|
871 |
|
|
err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4,
|
872 |
|
|
sizeof(frame->extramask));
|
873 |
|
|
|
874 |
|
|
/* Set up to return from userspace. If provided, use a stub
|
875 |
|
|
already in userspace. */
|
876 |
|
|
if (ka->sa.sa_flags & SA_RESTORER) {
|
877 |
|
|
unsigned int restorer = IA32_SA_RESTORER(ka);
|
878 |
|
|
err |= __put_user(restorer, &frame->pretcode);
|
879 |
|
|
} else {
|
880 |
|
|
err |= __put_user((long)frame->retcode, &frame->pretcode);
|
881 |
|
|
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
882 |
|
|
err |= __put_user(0xb858, (short *)(frame->retcode+0));
|
883 |
|
|
err |= __put_user(__IA32_NR_sigreturn & 0xffff, (short *)(frame->retcode+2));
|
884 |
|
|
err |= __put_user(__IA32_NR_sigreturn >> 16, (short *)(frame->retcode+4));
|
885 |
|
|
err |= __put_user(0x80cd, (short *)(frame->retcode+6));
|
886 |
|
|
}
|
887 |
|
|
|
888 |
|
|
if (err)
|
889 |
|
|
goto give_sigsegv;
|
890 |
|
|
|
891 |
|
|
/* Set up registers for signal handler */
|
892 |
|
|
regs->r12 = (unsigned long) frame;
|
893 |
|
|
regs->cr_iip = IA32_SA_HANDLER(ka);
|
894 |
|
|
|
895 |
|
|
set_fs(USER_DS);
|
896 |
|
|
regs->r16 = (__USER_DS << 16) | (__USER_DS); /* ES == DS, GS, FS are zero */
|
897 |
|
|
regs->r17 = (__USER_DS << 16) | __USER_CS;
|
898 |
|
|
|
899 |
|
|
#if 0
|
900 |
|
|
regs->eflags &= ~TF_MASK;
|
901 |
|
|
#endif
|
902 |
|
|
|
903 |
|
|
#if 0
|
904 |
|
|
printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n",
|
905 |
|
|
current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode);
|
906 |
|
|
#endif
|
907 |
|
|
|
908 |
|
|
return 1;
|
909 |
|
|
|
910 |
|
|
give_sigsegv:
|
911 |
|
|
if (sig == SIGSEGV)
|
912 |
|
|
ka->sa.sa_handler = SIG_DFL;
|
913 |
|
|
force_sig(SIGSEGV, current);
|
914 |
|
|
return 0;
|
915 |
|
|
}
|
916 |
|
|
|
917 |
|
|
static int
|
918 |
|
|
setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info,
|
919 |
|
|
sigset_t *set, struct pt_regs * regs)
|
920 |
|
|
{
|
921 |
|
|
struct exec_domain *ed = current->exec_domain;
|
922 |
|
|
struct rt_sigframe_ia32 *frame;
|
923 |
|
|
int err = 0;
|
924 |
|
|
|
925 |
|
|
frame = get_sigframe(ka, regs, sizeof(*frame));
|
926 |
|
|
|
927 |
|
|
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
|
928 |
|
|
goto give_sigsegv;
|
929 |
|
|
|
930 |
|
|
err |= __put_user((ed && ed->signal_invmap
|
931 |
|
|
&& sig < 32 ? ed->signal_invmap[sig] : sig),
|
932 |
|
|
&frame->sig);
|
933 |
|
|
err |= __put_user((long)&frame->info, &frame->pinfo);
|
934 |
|
|
err |= __put_user((long)&frame->uc, &frame->puc);
|
935 |
|
|
err |= copy_siginfo_to_user32(&frame->info, info);
|
936 |
|
|
|
937 |
|
|
/* Create the ucontext. */
|
938 |
|
|
err |= __put_user(0, &frame->uc.uc_flags);
|
939 |
|
|
err |= __put_user(0, &frame->uc.uc_link);
|
940 |
|
|
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
|
941 |
|
|
err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags);
|
942 |
|
|
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
|
943 |
|
|
err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]);
|
944 |
|
|
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
|
945 |
|
|
if (err)
|
946 |
|
|
goto give_sigsegv;
|
947 |
|
|
|
948 |
|
|
/* Set up to return from userspace. If provided, use a stub
|
949 |
|
|
already in userspace. */
|
950 |
|
|
if (ka->sa.sa_flags & SA_RESTORER) {
|
951 |
|
|
unsigned int restorer = IA32_SA_RESTORER(ka);
|
952 |
|
|
err |= __put_user(restorer, &frame->pretcode);
|
953 |
|
|
} else {
|
954 |
|
|
err |= __put_user((long)frame->retcode, &frame->pretcode);
|
955 |
|
|
/* This is movl $,%eax ; int $0x80 */
|
956 |
|
|
err |= __put_user(0xb8, (char *)(frame->retcode+0));
|
957 |
|
|
err |= __put_user(__IA32_NR_rt_sigreturn, (int *)(frame->retcode+1));
|
958 |
|
|
err |= __put_user(0x80cd, (short *)(frame->retcode+5));
|
959 |
|
|
}
|
960 |
|
|
|
961 |
|
|
if (err)
|
962 |
|
|
goto give_sigsegv;
|
963 |
|
|
|
964 |
|
|
/* Set up registers for signal handler */
|
965 |
|
|
regs->r12 = (unsigned long) frame;
|
966 |
|
|
regs->cr_iip = IA32_SA_HANDLER(ka);
|
967 |
|
|
|
968 |
|
|
set_fs(USER_DS);
|
969 |
|
|
|
970 |
|
|
regs->r16 = (__USER_DS << 16) | (__USER_DS); /* ES == DS, GS, FS are zero */
|
971 |
|
|
regs->r17 = (__USER_DS << 16) | __USER_CS;
|
972 |
|
|
|
973 |
|
|
#if 0
|
974 |
|
|
regs->eflags &= ~TF_MASK;
|
975 |
|
|
#endif
|
976 |
|
|
|
977 |
|
|
#if 0
|
978 |
|
|
printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n",
|
979 |
|
|
current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode);
|
980 |
|
|
#endif
|
981 |
|
|
|
982 |
|
|
return 1;
|
983 |
|
|
|
984 |
|
|
give_sigsegv:
|
985 |
|
|
if (sig == SIGSEGV)
|
986 |
|
|
ka->sa.sa_handler = SIG_DFL;
|
987 |
|
|
force_sig(SIGSEGV, current);
|
988 |
|
|
return 0;
|
989 |
|
|
}
|
990 |
|
|
|
991 |
|
|
int
|
992 |
|
|
ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
|
993 |
|
|
sigset_t *set, struct pt_regs *regs)
|
994 |
|
|
{
|
995 |
|
|
/* Set up the stack frame */
|
996 |
|
|
if (ka->sa.sa_flags & SA_SIGINFO)
|
997 |
|
|
return setup_rt_frame_ia32(sig, ka, info, set, regs);
|
998 |
|
|
else
|
999 |
|
|
return setup_frame_ia32(sig, ka, set, regs);
|
1000 |
|
|
}
|
1001 |
|
|
|
1002 |
|
|
asmlinkage long
|
1003 |
|
|
sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7,
|
1004 |
|
|
unsigned long stack)
|
1005 |
|
|
{
|
1006 |
|
|
struct pt_regs *regs = (struct pt_regs *) &stack;
|
1007 |
|
|
unsigned long esp = (unsigned int) regs->r12;
|
1008 |
|
|
struct sigframe_ia32 *frame = (struct sigframe_ia32 *)(esp - 8);
|
1009 |
|
|
sigset_t set;
|
1010 |
|
|
int eax;
|
1011 |
|
|
|
1012 |
|
|
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
|
1013 |
|
|
goto badframe;
|
1014 |
|
|
|
1015 |
|
|
if (__get_user(set.sig[0], &frame->sc.oldmask)
|
1016 |
|
|
|| (_IA32_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask,
|
1017 |
|
|
sizeof(frame->extramask))))
|
1018 |
|
|
goto badframe;
|
1019 |
|
|
|
1020 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
1021 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
1022 |
|
|
current->blocked = (sigset_t) set;
|
1023 |
|
|
recalc_sigpending(current);
|
1024 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
1025 |
|
|
|
1026 |
|
|
if (restore_sigcontext_ia32(regs, &frame->sc, &eax))
|
1027 |
|
|
goto badframe;
|
1028 |
|
|
return eax;
|
1029 |
|
|
|
1030 |
|
|
badframe:
|
1031 |
|
|
force_sig(SIGSEGV, current);
|
1032 |
|
|
return 0;
|
1033 |
|
|
}
|
1034 |
|
|
|
1035 |
|
|
asmlinkage long
|
1036 |
|
|
sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7,
|
1037 |
|
|
unsigned long stack)
|
1038 |
|
|
{
|
1039 |
|
|
struct pt_regs *regs = (struct pt_regs *) &stack;
|
1040 |
|
|
unsigned long esp = (unsigned int) regs->r12;
|
1041 |
|
|
struct rt_sigframe_ia32 *frame = (struct rt_sigframe_ia32 *)(esp - 4);
|
1042 |
|
|
sigset_t set;
|
1043 |
|
|
stack_t st;
|
1044 |
|
|
int eax;
|
1045 |
|
|
|
1046 |
|
|
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
|
1047 |
|
|
goto badframe;
|
1048 |
|
|
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
|
1049 |
|
|
goto badframe;
|
1050 |
|
|
|
1051 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
1052 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
1053 |
|
|
current->blocked = set;
|
1054 |
|
|
recalc_sigpending(current);
|
1055 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
1056 |
|
|
|
1057 |
|
|
if (restore_sigcontext_ia32(regs, &frame->uc.uc_mcontext, &eax))
|
1058 |
|
|
goto badframe;
|
1059 |
|
|
|
1060 |
|
|
if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
|
1061 |
|
|
goto badframe;
|
1062 |
|
|
/* It is more difficult to avoid calling this function than to
|
1063 |
|
|
call it and ignore errors. */
|
1064 |
|
|
do_sigaltstack(&st, NULL, esp);
|
1065 |
|
|
|
1066 |
|
|
return eax;
|
1067 |
|
|
|
1068 |
|
|
badframe:
|
1069 |
|
|
force_sig(SIGSEGV, current);
|
1070 |
|
|
return 0;
|
1071 |
|
|
}
|