diff options
Diffstat (limited to 'arch/ia64/ia32/ia32_signal.c')
| -rw-r--r-- | arch/ia64/ia32/ia32_signal.c | 1010 |
1 files changed, 0 insertions, 1010 deletions
diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c deleted file mode 100644 index b763ca19ef17..000000000000 --- a/arch/ia64/ia32/ia32_signal.c +++ /dev/null @@ -1,1010 +0,0 @@ -/* - * IA32 Architecture-specific signal handling support. - * - * Copyright (C) 1999, 2001-2002, 2005 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> - * Copyright (C) 2000 VA Linux Co - * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> - * - * Derived from i386 and Alpha versions. - */ - -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/personality.h> -#include <linux/ptrace.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/smp.h> -#include <linux/stddef.h> -#include <linux/syscalls.h> -#include <linux/unistd.h> -#include <linux/wait.h> -#include <linux/compat.h> - -#include <asm/intrinsics.h> -#include <asm/uaccess.h> -#include <asm/rse.h> -#include <asm/sigcontext.h> - -#include "ia32priv.h" - -#include "../kernel/sigframe.h" - -#define A(__x) ((unsigned long)(__x)) - -#define DEBUG_SIG 0 -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -#define __IA32_NR_sigreturn 119 -#define __IA32_NR_rt_sigreturn 173 - -struct sigframe_ia32 -{ - int pretcode; - int sig; - struct sigcontext_ia32 sc; - struct _fpstate_ia32 fpstate; - unsigned int extramask[_COMPAT_NSIG_WORDS-1]; - char retcode[8]; -}; - -struct rt_sigframe_ia32 -{ - int pretcode; - int sig; - int pinfo; - int puc; - compat_siginfo_t info; - struct ucontext_ia32 uc; - struct _fpstate_ia32 fpstate; - char retcode[8]; -}; - -int -copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from) -{ - unsigned long tmp; - int err; - - if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t))) - return -EFAULT; - - err = __get_user(to->si_signo, &from->si_signo); - err |= __get_user(to->si_errno, &from->si_errno); - err |= __get_user(to->si_code, &from->si_code); - - if (to->si_code < 0) - err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); - else { - switch (to->si_code >> 16) { - case __SI_CHLD >> 16: - err |= __get_user(to->si_utime, &from->si_utime); - err |= __get_user(to->si_stime, &from->si_stime); - err |= __get_user(to->si_status, &from->si_status); - default: - err |= __get_user(to->si_pid, &from->si_pid); - err |= __get_user(to->si_uid, &from->si_uid); - break; - case __SI_FAULT >> 16: - err |= __get_user(tmp, &from->si_addr); - to->si_addr = (void __user *) tmp; - break; - case __SI_POLL >> 16: - err |= __get_user(to->si_band, &from->si_band); - err |= __get_user(to->si_fd, &from->si_fd); - break; - case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ - case __SI_MESGQ >> 16: - err |= __get_user(to->si_pid, &from->si_pid); - err |= __get_user(to->si_uid, &from->si_uid); - err |= __get_user(to->si_int, &from->si_int); - break; - } - } - return err; -} - -int -copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from) -{ - unsigned int addr; - int err; - - if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) - return -EFAULT; - - /* If you change siginfo_t structure, please be sure - this code is fixed accordingly. - It should never copy any pad contained in the structure - to avoid security leaks, but must copy the generic - 3 ints plus the relevant union member. - This routine must convert siginfo from 64bit to 32bit as well - at the same time. */ - err = __put_user(from->si_signo, &to->si_signo); - err |= __put_user(from->si_errno, &to->si_errno); - err |= __put_user((short)from->si_code, &to->si_code); - if (from->si_code < 0) - err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); - else { - switch (from->si_code >> 16) { - case __SI_CHLD >> 16: - err |= __put_user(from->si_utime, &to->si_utime); - err |= __put_user(from->si_stime, &to->si_stime); - err |= __put_user(from->si_status, &to->si_status); - default: - err |= __put_user(from->si_pid, &to->si_pid); - err |= __put_user(from->si_uid, &to->si_uid); - break; - case __SI_FAULT >> 16: - /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */ - err |= __put_user(from->_sifields._pad[0], &to->si_addr); - break; - case __SI_POLL >> 16: - err |= __put_user(from->si_band, &to->si_band); - err |= __put_user(from->si_fd, &to->si_fd); - break; - case __SI_TIMER >> 16: - err |= __put_user(from->si_tid, &to->si_tid); - err |= __put_user(from->si_overrun, &to->si_overrun); - addr = (unsigned long) from->si_ptr; - err |= __put_user(addr, &to->si_ptr); - break; - case __SI_RT >> 16: /* Not generated by the kernel as of now. */ - case __SI_MESGQ >> 16: - err |= __put_user(from->si_uid, &to->si_uid); - err |= __put_user(from->si_pid, &to->si_pid); - addr = (unsigned long) from->si_ptr; - err |= __put_user(addr, &to->si_ptr); - break; - } - } - return err; -} - - -/* - * SAVE and RESTORE of ia32 fpstate info, from ia64 current state - * Used in exception handler to pass the fpstate to the user, and restore - * the fpstate while returning from the exception handler. - * - * fpstate info and their mapping to IA64 regs: - * fpstate REG(BITS) Attribute Comments - * cw ar.fcr(0:12) with bits 7 and 6 not used - * sw ar.fsr(0:15) - * tag ar.fsr(16:31) with odd numbered bits not used - * (read returns 0, writes ignored) - * ipoff ar.fir(0:31) - * cssel ar.fir(32:47) - * dataoff ar.fdr(0:31) - * datasel ar.fdr(32:47) - * - * _st[(0+TOS)%8] f8 - * _st[(1+TOS)%8] f9 - * _st[(2+TOS)%8] f10 - * _st[(3+TOS)%8] f11 (f8..f11 from ptregs) - * : : : (f12..f15 from live reg) - * : : : - * _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13) - * - * status Same as sw RO - * magic 0 as X86_FXSR_MAGIC in ia32 - * mxcsr Bits(7:15)=ar.fcr(39:47) - * Bits(0:5) =ar.fsr(32:37) with bit 6 reserved - * _xmm[0..7] f16..f31 (live registers) - * with _xmm[0] - * Bit(64:127)=f17(0:63) - * Bit(0:63)=f16(0:63) - * All other fields unused... - */ - -static int -save_ia32_fpstate_live (struct _fpstate_ia32 __user *save) -{ - struct task_struct *tsk = current; - struct pt_regs *ptp; - struct _fpreg_ia32 *fpregp; - char buf[32]; - unsigned long fsr, fcr, fir, fdr; - unsigned long new_fsr; - unsigned long num128[2]; - unsigned long mxcsr=0; - int fp_tos, fr8_st_map; - - if (!access_ok(VERIFY_WRITE, save, sizeof(*save))) - return -EFAULT; - - /* Read in fsr, fcr, fir, fdr and copy onto fpstate */ - fsr = ia64_getreg(_IA64_REG_AR_FSR); - fcr = ia64_getreg(_IA64_REG_AR_FCR); - fir = ia64_getreg(_IA64_REG_AR_FIR); - fdr = ia64_getreg(_IA64_REG_AR_FDR); - - /* - * We need to clear the exception state before calling the signal handler. Clear - * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex - * instruction. - */ - new_fsr = fsr & ~0x80ff; - ia64_setreg(_IA64_REG_AR_FSR, new_fsr); - - __put_user(fcr & 0xffff, &save->cw); - __put_user(fsr & 0xffff, &save->sw); - __put_user((fsr>>16) & 0xffff, &save->tag); - __put_user(fir, &save->ipoff); - __put_user((fir>>32) & 0xffff, &save->cssel); - __put_user(fdr, &save->dataoff); - __put_user((fdr>>32) & 0xffff, &save->datasel); - __put_user(fsr & 0xffff, &save->status); - - mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f); - __put_user(mxcsr & 0xffff, &save->mxcsr); - __put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000 - - /* - * save f8..f11 from pt_regs - * save f12..f15 from live register set - */ - /* - * Find the location where f8 has to go in fp reg stack. This depends on - * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps - * to. - */ - fp_tos = (fsr>>11)&0x7; - fr8_st_map = (8-fp_tos)&0x7; - ptp = task_pt_regs(tsk); - fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15); - ia64f2ia32f(fpregp, &ptp->f8); - copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64f2ia32f(fpregp, &ptp->f9); - copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64f2ia32f(fpregp, &ptp->f10); - copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64f2ia32f(fpregp, &ptp->f11); - copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - - ia64_stfe(fpregp, 12); - copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64_stfe(fpregp, 13); - copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64_stfe(fpregp, 14); - copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - ia64_stfe(fpregp, 15); - copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32)); - - ia64_stf8(&num128[0], 16); - ia64_stf8(&num128[1], 17); - copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 18); - ia64_stf8(&num128[1], 19); - copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 20); - ia64_stf8(&num128[1], 21); - copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 22); - ia64_stf8(&num128[1], 23); - copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 24); - ia64_stf8(&num128[1], 25); - copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 26); - ia64_stf8(&num128[1], 27); - copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 28); - ia64_stf8(&num128[1], 29); - copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32)); - - ia64_stf8(&num128[0], 30); - ia64_stf8(&num128[1], 31); - copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32)); - return 0; -} - -static int -restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save) -{ - struct task_struct *tsk = current; - struct pt_regs *ptp; - unsigned int lo, hi; - unsigned long num128[2]; - unsigned long num64, mxcsr; - struct _fpreg_ia32 *fpregp; - char buf[32]; - unsigned long fsr, fcr, fir, fdr; - int fp_tos, fr8_st_map; - - if (!access_ok(VERIFY_READ, save, sizeof(*save))) - return(-EFAULT); - - /* - * Updating fsr, fcr, fir, fdr. - * Just a bit more complicated than save. - * - Need to make sure that we don't write any value other than the - * specific fpstate info - * - Need to make sure that the untouched part of frs, fdr, fir, fcr - * should remain same while writing. - * So, we do a read, change specific fields and write. - */ - fsr = ia64_getreg(_IA64_REG_AR_FSR); - fcr = ia64_getreg(_IA64_REG_AR_FCR); - fir = ia64_getreg(_IA64_REG_AR_FIR); - fdr = ia64_getreg(_IA64_REG_AR_FDR); - - __get_user(mxcsr, (unsigned int __user *)&save->mxcsr); - /* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */ - __get_user(lo, (unsigned int __user *)&save->cw); - num64 = mxcsr & 0xff10; - num64 = (num64 << 32) | (lo & 0x1f3f); - fcr = (fcr & (~0xff1000001f3fUL)) | num64; - - /* setting bits 0..31 with sw and tag and 32..37 from mxcsr */ - __get_user(lo, (unsigned int __user *)&save->sw); - /* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */ - if ( !(lo & 0x7f) ) - lo &= (~0x8080); - __get_user(hi, (unsigned int __user *)&save->tag); - num64 = mxcsr & 0x3f; - num64 = (num64 << 16) | (hi & 0xffff); - num64 = (num64 << 16) | (lo & 0xffff); - fsr = (fsr & (~0x3fffffffffUL)) | num64; - - /* setting bits 0..47 with cssel and ipoff */ - __get_user(lo, (unsigned int __user *)&save->ipoff); - __get_user(hi, (unsigned int __user *)&save->cssel); - num64 = hi & 0xffff; - num64 = (num64 << 32) | lo; - fir = (fir & (~0xffffffffffffUL)) | num64; - - /* setting bits 0..47 with datasel and dataoff */ - __get_user(lo, (unsigned int __user *)&save->dataoff); - __get_user(hi, (unsigned int __user *)&save->datasel); - num64 = hi & 0xffff; - num64 = (num64 << 32) | lo; - fdr = (fdr & (~0xffffffffffffUL)) | num64; - - ia64_setreg(_IA64_REG_AR_FSR, fsr); - ia64_setreg(_IA64_REG_AR_FCR, fcr); - ia64_setreg(_IA64_REG_AR_FIR, fir); - ia64_setreg(_IA64_REG_AR_FDR, fdr); - - /* - * restore f8..f11 onto pt_regs - * restore f12..f15 onto live registers - */ - /* - * Find the location where f8 has to go in fp reg stack. This depends on - * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps - * to. - */ - fp_tos = (fsr>>11)&0x7; - fr8_st_map = (8-fp_tos)&0x7; - fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15); - - ptp = task_pt_regs(tsk); - copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia32f2ia64f(&ptp->f8, fpregp); - copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia32f2ia64f(&ptp->f9, fpregp); - copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia32f2ia64f(&ptp->f10, fpregp); - copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia32f2ia64f(&ptp->f11, fpregp); - - copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia64_ldfe(12, fpregp); - copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia64_ldfe(13, fpregp); - copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia64_ldfe(14, fpregp); - copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32)); - ia64_ldfe(15, fpregp); - - copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(16, &num128[0]); - ia64_ldf8(17, &num128[1]); - - copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(18, &num128[0]); - ia64_ldf8(19, &num128[1]); - - copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(20, &num128[0]); - ia64_ldf8(21, &num128[1]); - - copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(22, &num128[0]); - ia64_ldf8(23, &num128[1]); - - copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(24, &num128[0]); - ia64_ldf8(25, &num128[1]); - - copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(26, &num128[0]); - ia64_ldf8(27, &num128[1]); - - copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(28, &num128[0]); - ia64_ldf8(29, &num128[1]); - - copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32)); - ia64_ldf8(30, &num128[0]); - ia64_ldf8(31, &num128[1]); - return 0; -} - -static inline void -sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer) -{ - if (handler + 1 <= 2) - /* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */ - sa->sa.sa_handler = (__sighandler_t) A((int) handler); - else - sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler); -} - -asmlinkage long -sys32_sigsuspend (int history0, int history1, old_sigset_t mask) -{ - mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_restore_sigmask(); - return -ERESTARTNOHAND; -} - -asmlinkage long -sys32_signal (int sig, unsigned int handler) -{ - struct k_sigaction new_sa, old_sa; - int ret; - - sigact_set_handler(&new_sa, handler, 0); - new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK; - sigemptyset(&new_sa.sa.sa_mask); - - ret = do_sigaction(sig, &new_sa, &old_sa); - - return ret ? ret : IA32_SA_HANDLER(&old_sa); -} - -asmlinkage long -sys32_rt_sigaction (int sig, struct sigaction32 __user *act, - struct sigaction32 __user *oact, unsigned int sigsetsize) -{ - struct k_sigaction new_ka, old_ka; - unsigned int handler, restorer; - int ret; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - - if (act) { - ret = get_user(handler, &act->sa_handler); - ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags); - ret |= get_user(restorer, &act->sa_restorer); - ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(compat_sigset_t)); - if (ret) - return -EFAULT; - - sigact_set_handler(&new_ka, handler, restorer); - } - - ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); - - if (!ret && oact) { - ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler); - ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags); - ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer); - ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(compat_sigset_t)); - } - return ret; -} - - -asmlinkage long -sys32_rt_sigprocmask (int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, - unsigned int sigsetsize) -{ - mm_segment_t old_fs = get_fs(); - sigset_t s; - long ret; - - if (sigsetsize > sizeof(s)) - return -EINVAL; - - if (set) { - memset(&s, 0, sizeof(s)); - if (copy_from_user(&s.sig, set, sigsetsize)) - return -EFAULT; - } - set_fs(KERNEL_DS); - ret = sys_rt_sigprocmask(how, - set ? (sigset_t __user *) &s : NULL, - oset ? (sigset_t __user *) &s : NULL, sizeof(s)); - set_fs(old_fs); - if (ret) - return ret; - if (oset) { - if (copy_to_user(oset, &s.sig, sigsetsize)) - return -EFAULT; - } - return 0; -} - -asmlinkage long -sys32_rt_sigqueueinfo (int pid, int sig, compat_siginfo_t __user *uinfo) -{ - mm_segment_t old_fs = get_fs(); - siginfo_t info; - int ret; - - if (copy_siginfo_from_user32(&info, uinfo)) - return -EFAULT; - set_fs(KERNEL_DS); - ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info); - set_fs(old_fs); - return ret; -} - -asmlinkage long -sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) -{ - struct k_sigaction new_ka, old_ka; - unsigned int handler, restorer; - int ret; - - if (act) { - compat_old_sigset_t mask; - - ret = get_user(handler, &act->sa_handler); - ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags); - ret |= get_user(restorer, &act->sa_restorer); - ret |= get_user(mask, &act->sa_mask); - if (ret) - return ret; - - sigact_set_handler(&new_ka, handler, restorer); - siginitset(&new_ka.sa.sa_mask, mask); - } - - ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); - - if (!ret && oact) { - ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler); - ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags); - ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer); - ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); - } - - return ret; -} - -static int -setup_sigcontext_ia32 (struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate, - struct pt_regs *regs, unsigned long mask) -{ - int err = 0; - unsigned long flag; - - if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc))) - return -EFAULT; - - err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int __user *)&sc->fs); - err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int __user *)&sc->gs); - err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int __user *)&sc->es); - err |= __put_user(regs->r16 & 0xffff, (unsigned int __user *)&sc->ds); - err |= __put_user(regs->r15, &sc->edi); - err |= __put_user(regs->r14, &sc->esi); - err |= __put_user(regs->r13, &sc->ebp); - err |= __put_user(regs->r12, &sc->esp); - err |= __put_user(regs->r11, &sc->ebx); - err |= __put_user(regs->r10, &sc->edx); - err |= __put_user(regs->r9, &sc->ecx); - err |= __put_user(regs->r8, &sc->eax); -#if 0 - err |= __put_user(current->tss.trap_no, &sc->trapno); - err |= __put_user(current->tss.error_code, &sc->err); -#endif - err |= __put_user(regs->cr_iip, &sc->eip); - err |= __put_user(regs->r17 & 0xffff, (unsigned int __user *)&sc->cs); - /* - * `eflags' is in an ar register for this context - */ - flag = ia64_getreg(_IA64_REG_AR_EFLAG); - err |= __put_user((unsigned int)flag, &sc->eflags); - err |= __put_user(regs->r12, &sc->esp_at_signal); - err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int __user *)&sc->ss); - - if ( save_ia32_fpstate_live(fpstate) < 0 ) - err = -EFAULT; - else - err |= __put_user((u32)(u64)fpstate, &sc->fpstate); - -#if 0 - tmp = save_i387(fpstate); - if (tmp < 0) - err = 1; - else - err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate); - - /* non-iBCS2 extensions.. */ -#endif - err |= __put_user(mask, &sc->oldmask); -#if 0 - err |= __put_user(current->tss.cr2, &sc->cr2); -#endif - return err; -} - -static int -restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 __user *sc, int *peax) -{ - unsigned int err = 0; - - /* Always make any pending restarted system calls return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - if (!access_ok(VERIFY_READ, sc, sizeof(*sc))) - return(-EFAULT); - -#define COPY(ia64x, ia32x) err |= __get_user(regs->ia64x, &sc->ia32x) - -#define copyseg_gs(tmp) (regs->r16 |= (unsigned long) (tmp) << 48) -#define copyseg_fs(tmp) (regs->r16 |= (unsigned long) (tmp) << 32) -#define copyseg_cs(tmp) (regs->r17 |= tmp) -#define copyseg_ss(tmp) (regs->r17 |= (unsigned long) (tmp) << 16) -#define copyseg_es(tmp) (regs->r16 |= (unsigned long) (tmp) << 16) -#define copyseg_ds(tmp) (regs->r16 |= tmp) - -#define COPY_SEG(seg) \ - { \ - unsigned short tmp; \ - err |= __get_user(tmp, &sc->seg); \ - copyseg_##seg(tmp); \ - } -#define COPY_SEG_STRICT(seg) \ - { \ - unsigned short tmp; \ - err |= __get_user(tmp, &sc->seg); \ - copyseg_##seg(tmp|3); \ - } - - /* To make COPY_SEGs easier, we zero r16, r17 */ - regs->r16 = 0; - regs->r17 = 0; - - COPY_SEG(gs); - COPY_SEG(fs); - COPY_SEG(es); - COPY_SEG(ds); - COPY(r15, edi); - COPY(r14, esi); - COPY(r13, ebp); - COPY(r12, esp); - COPY(r11, ebx); - COPY(r10, edx); - COPY(r9, ecx); - COPY(cr_iip, eip); - COPY_SEG_STRICT(cs); - COPY_SEG_STRICT(ss); - ia32_load_segment_descriptors(current); - { - unsigned int tmpflags; - unsigned long flag; - - /* - * IA32 `eflags' is not part of `pt_regs', it's in an ar register which - * is part of the thread context. Fortunately, we are executing in the - * IA32 process's context. - */ - err |= __get_user(tmpflags, &sc->eflags); - flag = ia64_getreg(_IA64_REG_AR_EFLAG); - flag &= ~0x40DD5; - flag |= (tmpflags & 0x40DD5); - ia64_setreg(_IA64_REG_AR_EFLAG, flag); - - regs->r1 = -1; /* disable syscall checks, r1 is orig_eax */ - } - - { - struct _fpstate_ia32 __user *buf = NULL; - u32 fpstate_ptr; - err |= get_user(fpstate_ptr, &(sc->fpstate)); - buf = compat_ptr(fpstate_ptr); - if (buf) { - err |= restore_ia32_fpstate_live(buf); - } - } - -#if 0 - { - struct _fpstate * buf; - err |= __get_user(buf, &sc->fpstate); - if (buf) { - if (!access_ok(VERIFY_READ, buf, sizeof(*buf))) - goto badframe; - err |= restore_i387(buf); - } - } -#endif - - err |= __get_user(*peax, &sc->eax); - return err; - -#if 0 - badframe: - return 1; -#endif -} - -/* - * Determine which stack to use.. - */ -static inline void __user * -get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) -{ - unsigned long esp; - - /* Default to using normal stack (truncate off sign-extension of bit 31: */ - esp = (unsigned int) regs->r12; - - /* This is the X/Open sanctioned signal stack switching. */ - if (ka->sa.sa_flags & SA_ONSTACK) { - int onstack = sas_ss_flags(esp); - - if (onstack == 0) - esp = current->sas_ss_sp + current->sas_ss_size; - else if (onstack == SS_ONSTACK) { - /* - * If we are on the alternate signal stack and would - * overflow it, don't. Return an always-bogus address - * instead so we will die with SIGSEGV. - */ - if (!likely(on_sig_stack(esp - frame_size))) - return (void __user *) -1L; - } - } - /* Legacy stack switching not supported */ - - esp -= frame_size; - /* Align the stack pointer according to the i386 ABI, - * i.e. so that on function entry ((sp + 4) & 15) == 0. */ - esp = ((esp + 4) & -16ul) - 4; - return (void __user *) esp; -} - -static int -setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs) -{ - struct exec_domain *ed = current_thread_info()->exec_domain; - struct sigframe_ia32 __user *frame; - int err = 0; - - frame = get_sigframe(ka, regs, sizeof(*frame)); - - if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; - - err |= __put_user((ed && ed->signal_invmap && sig < 32 - ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig); - - err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]); - - if (_COMPAT_NSIG_WORDS > 1) - err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4, - sizeof(frame->extramask)); - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - unsigned int restorer = IA32_SA_RESTORER(ka); - err |= __put_user(restorer, &frame->pretcode); - } else { - /* Pointing to restorer in ia32 gate page */ - err |= __put_user(IA32_GATE_OFFSET, &frame->pretcode); - } - - /* This is popl %eax ; movl $,%eax ; int $0x80 - * and there for historical reasons only. - * See arch/i386/kernel/signal.c - */ - - err |= __put_user(0xb858, (short __user *)(frame->retcode+0)); - err |= __put_user(__IA32_NR_sigreturn, (int __user *)(frame->retcode+2)); - err |= __put_user(0x80cd, (short __user *)(frame->retcode+6)); - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - regs->r12 = (unsigned long) frame; - regs->cr_iip = IA32_SA_HANDLER(ka); - - set_fs(USER_DS); - -#if 0 - regs->eflags &= ~TF_MASK; -#endif - -#if 0 - printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n", - current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode); -#endif - - return 1; - - give_sigsegv: - force_sigsegv(sig, current); - return 0; -} - -static int -setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs * regs) -{ - struct exec_domain *ed = current_thread_info()->exec_domain; - compat_uptr_t pinfo, puc; - struct rt_sigframe_ia32 __user *frame; - int err = 0; - - frame = get_sigframe(ka, regs, sizeof(*frame)); - - if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; - - err |= __put_user((ed && ed->signal_invmap - && sig < 32 ? ed->signal_invmap[sig] : sig), &frame->sig); - - pinfo = (long __user) &frame->info; - puc = (long __user) &frame->uc; - err |= __put_user(pinfo, &frame->pinfo); - err |= __put_user(puc, &frame->puc); - err |= copy_siginfo_to_user32(&frame->info, info); - - /* Create the ucontext. */ - err |= __put_user(0, &frame->uc.uc_flags); - err |= __put_user(0, &frame->uc.uc_link); - err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); - err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]); - err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); - if (err) - goto give_sigsegv; - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - unsigned int restorer = IA32_SA_RESTORER(ka); - err |= __put_user(restorer, &frame->pretcode); - } else { - /* Pointing to rt_restorer in ia32 gate page */ - err |= __put_user(IA32_GATE_OFFSET + 8, &frame->pretcode); - } - - /* This is movl $,%eax ; int $0x80 - * and there for historical reasons only. - * See arch/i386/kernel/signal.c - */ - - err |= __put_user(0xb8, (char __user *)(frame->retcode+0)); - err |= __put_user(__IA32_NR_rt_sigreturn, (int __user *)(frame->retcode+1)); - err |= __put_user(0x80cd, (short __user *)(frame->retcode+5)); - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - regs->r12 = (unsigned long) frame; - regs->cr_iip = IA32_SA_HANDLER(ka); - - set_fs(USER_DS); - -#if 0 - regs->eflags &= ~TF_MASK; -#endif - -#if 0 - printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n", - current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode); -#endif - - return 1; - -give_sigsegv: - force_sigsegv(sig, current); - return 0; -} - -int -ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) -{ - /* Set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - return setup_rt_frame_ia32(sig, ka, info, set, regs); - else - return setup_frame_ia32(sig, ka, set, regs); -} - -asmlinkage long -sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, - int arg6, int arg7, struct pt_regs regs) -{ - unsigned long esp = (unsigned int) regs.r12; - struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(esp - 8); - sigset_t set; - int eax; - - if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) - goto badframe; - - if (__get_user(set.sig[0], &frame->sc.oldmask) - || (_COMPAT_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask, - sizeof(frame->extramask)))) - goto badframe; - - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - if (restore_sigcontext_ia32(®s, &frame->sc, &eax)) - goto badframe; - return eax; - - badframe: - force_sig(SIGSEGV, current); - return 0; -} - -asmlinkage long -sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, - int arg5, int arg6, int arg7, struct pt_regs regs) -{ - unsigned long esp = (unsigned int) regs.r12; - struct rt_sigframe_ia32 __user *frame = (struct rt_sigframe_ia32 __user *)(esp - 4); - sigset_t set; - int eax; - - if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) - goto badframe; - if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) - goto badframe; - - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - if (restore_sigcontext_ia32(®s, &frame->uc.uc_mcontext, &eax)) - goto badframe; - - /* It is more difficult to avoid calling this function than to - call it and ignore errors. */ - do_sigaltstack((stack_t __user *) &frame->uc.uc_stack, NULL, esp); - - return eax; - - badframe: - force_sig(SIGSEGV, current); - return 0; -} |
