endif
obj-y = bug.o bugs_$(BITS).o delay_$(BITS).o fault.o ksyms.o ldt.o \
- ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal_$(BITS).o \
+ ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal.o \
stub_$(BITS).o stub_segv.o syscalls_$(BITS).o \
sys_call_table_$(BITS).o sysrq_$(BITS).o tls_$(BITS).o \
mem_$(BITS).o subarch.o os-$(OS)/
#define PT_REGS_ORIG_RAX(r) UPT_ORIG_RAX(&(r)->regs)
#define PT_REGS_RIP(r) UPT_IP(&(r)->regs)
-#define PT_REGS_RSP(r) UPT_SP(&(r)->regs)
+#define PT_REGS_SP(r) UPT_SP(&(r)->regs)
#define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)
--- /dev/null
+/*
+ * Copyright (C) 2003 PathScale, Inc.
+ * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/kernel.h>
+#include <asm/unistd.h>
+#include <asm/uaccess.h>
+#include <asm/ucontext.h>
+#include "frame_kern.h"
+#include "skas.h"
+
+#ifdef CONFIG_X86_32
+
+/*
+ * FPU tag word conversions.
+ */
+
+static inline unsigned short twd_i387_to_fxsr(unsigned short twd)
+{
+ unsigned int tmp; /* to avoid 16 bit prefixes in the code */
+
+ /* Transform each pair of bits into 01 (valid) or 00 (empty) */
+ tmp = ~twd;
+ tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
+ /* and move the valid bits to the lower byte. */
+ tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
+ tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
+ tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
+ return tmp;
+}
+
+static inline unsigned long twd_fxsr_to_i387(struct user_fxsr_struct *fxsave)
+{
+ struct _fpxreg *st = NULL;
+ unsigned long twd = (unsigned long) fxsave->twd;
+ unsigned long tag;
+ unsigned long ret = 0xffff0000;
+ int i;
+
+#define FPREG_ADDR(f, n) ((char *)&(f)->st_space + (n) * 16)
+
+ for (i = 0; i < 8; i++) {
+ if (twd & 0x1) {
+ st = (struct _fpxreg *) FPREG_ADDR(fxsave, i);
+
+ switch (st->exponent & 0x7fff) {
+ case 0x7fff:
+ tag = 2; /* Special */
+ break;
+ case 0x0000:
+ if ( !st->significand[0] &&
+ !st->significand[1] &&
+ !st->significand[2] &&
+ !st->significand[3] ) {
+ tag = 1; /* Zero */
+ } else {
+ tag = 2; /* Special */
+ }
+ break;
+ default:
+ if (st->significand[3] & 0x8000) {
+ tag = 0; /* Valid */
+ } else {
+ tag = 2; /* Special */
+ }
+ break;
+ }
+ } else {
+ tag = 3; /* Empty */
+ }
+ ret |= (tag << (2 * i));
+ twd = twd >> 1;
+ }
+ return ret;
+}
+
+static int convert_fxsr_to_user(struct _fpstate __user *buf,
+ struct user_fxsr_struct *fxsave)
+{
+ unsigned long env[7];
+ struct _fpreg __user *to;
+ struct _fpxreg *from;
+ int i;
+
+ env[0] = (unsigned long)fxsave->cwd | 0xffff0000ul;
+ env[1] = (unsigned long)fxsave->swd | 0xffff0000ul;
+ env[2] = twd_fxsr_to_i387(fxsave);
+ env[3] = fxsave->fip;
+ env[4] = fxsave->fcs | ((unsigned long)fxsave->fop << 16);
+ env[5] = fxsave->foo;
+ env[6] = fxsave->fos;
+
+ if (__copy_to_user(buf, env, 7 * sizeof(unsigned long)))
+ return 1;
+
+ to = &buf->_st[0];
+ from = (struct _fpxreg *) &fxsave->st_space[0];
+ for (i = 0; i < 8; i++, to++, from++) {
+ unsigned long __user *t = (unsigned long __user *)to;
+ unsigned long *f = (unsigned long *)from;
+
+ if (__put_user(*f, t) ||
+ __put_user(*(f + 1), t + 1) ||
+ __put_user(from->exponent, &to->exponent))
+ return 1;
+ }
+ return 0;
+}
+
+static int convert_fxsr_from_user(struct user_fxsr_struct *fxsave,
+ struct _fpstate __user *buf)
+{
+ unsigned long env[7];
+ struct _fpxreg *to;
+ struct _fpreg __user *from;
+ int i;
+
+ if (copy_from_user( env, buf, 7 * sizeof(long)))
+ return 1;
+
+ fxsave->cwd = (unsigned short)(env[0] & 0xffff);
+ fxsave->swd = (unsigned short)(env[1] & 0xffff);
+ fxsave->twd = twd_i387_to_fxsr((unsigned short)(env[2] & 0xffff));
+ fxsave->fip = env[3];
+ fxsave->fop = (unsigned short)((env[4] & 0xffff0000ul) >> 16);
+ fxsave->fcs = (env[4] & 0xffff);
+ fxsave->foo = env[5];
+ fxsave->fos = env[6];
+
+ to = (struct _fpxreg *) &fxsave->st_space[0];
+ from = &buf->_st[0];
+ for (i = 0; i < 8; i++, to++, from++) {
+ unsigned long *t = (unsigned long *)to;
+ unsigned long __user *f = (unsigned long __user *)from;
+
+ if (__get_user(*t, f) ||
+ __get_user(*(t + 1), f + 1) ||
+ __get_user(to->exponent, &from->exponent))
+ return 1;
+ }
+ return 0;
+}
+
+extern int have_fpx_regs;
+
+#endif
+
+static int copy_sc_from_user(struct pt_regs *regs,
+ struct sigcontext __user *from)
+{
+ struct sigcontext sc;
+ int err, pid;
+
+ err = copy_from_user(&sc, from, sizeof(sc));
+ if (err)
+ return err;
+
+#define GETREG(regno, regname) regs->regs.gp[HOST_##regno] = sc.regname
+
+#ifdef CONFIG_X86_32
+ GETREG(GS, gs);
+ GETREG(FS, fs);
+ GETREG(ES, es);
+ GETREG(DS, ds);
+#endif
+ GETREG(DI, di);
+ GETREG(SI, si);
+ GETREG(BP, bp);
+ GETREG(SP, sp);
+ GETREG(BX, bx);
+ GETREG(DX, dx);
+ GETREG(CX, cx);
+ GETREG(AX, ax);
+ GETREG(IP, ip);
+
+#ifdef CONFIG_X86_64
+ GETREG(R8, r8);
+ GETREG(R9, r9);
+ GETREG(R10, r10);
+ GETREG(R11, r11);
+ GETREG(R12, r12);
+ GETREG(R13, r13);
+ GETREG(R14, r14);
+ GETREG(R15, r15);
+#endif
+
+ GETREG(CS, cs);
+ GETREG(EFLAGS, flags);
+#ifdef CONFIG_X86_32
+ GETREG(SS, ss);
+#endif
+
+#undef GETREG
+
+ pid = userspace_pid[current_thread_info()->cpu];
+#ifdef CONFIG_X86_32
+ if (have_fpx_regs) {
+ struct user_fxsr_struct fpx;
+
+ err = copy_from_user(&fpx,
+ &((struct _fpstate __user *)sc.fpstate)->_fxsr_env[0],
+ sizeof(struct user_fxsr_struct));
+ if (err)
+ return 1;
+
+ err = convert_fxsr_from_user(&fpx, sc.fpstate);
+ if (err)
+ return 1;
+
+ err = restore_fpx_registers(pid, (unsigned long *) &fpx);
+ if (err < 0) {
+ printk(KERN_ERR "copy_sc_from_user - "
+ "restore_fpx_registers failed, errno = %d\n",
+ -err);
+ return 1;
+ }
+ } else
+#endif
+ {
+ struct user_i387_struct fp;
+
+ err = copy_from_user(&fp, sc.fpstate,
+ sizeof(struct user_i387_struct));
+ if (err)
+ return 1;
+
+ err = restore_fp_registers(pid, (unsigned long *) &fp);
+ if (err < 0) {
+ printk(KERN_ERR "copy_sc_from_user - "
+ "restore_fp_registers failed, errno = %d\n",
+ -err);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int copy_sc_to_user(struct sigcontext __user *to,
+ struct _fpstate __user *to_fp, struct pt_regs *regs,
+ unsigned long mask)
+{
+ struct sigcontext sc;
+ struct faultinfo * fi = ¤t->thread.arch.faultinfo;
+ int err, pid;
+ memset(&sc, 0, sizeof(struct sigcontext));
+
+#define PUTREG(regno, regname) sc.regname = regs->regs.gp[HOST_##regno]
+
+#ifdef CONFIG_X86_32
+ PUTREG(GS, gs);
+ PUTREG(FS, fs);
+ PUTREG(ES, es);
+ PUTREG(DS, ds);
+#endif
+ PUTREG(DI, di);
+ PUTREG(SI, si);
+ PUTREG(BP, bp);
+ PUTREG(SP, sp);
+ PUTREG(BX, bx);
+ PUTREG(DX, dx);
+ PUTREG(CX, cx);
+ PUTREG(AX, ax);
+#ifdef CONFIG_X86_64
+ PUTREG(R8, r8);
+ PUTREG(R9, r9);
+ PUTREG(R10, r10);
+ PUTREG(R11, r11);
+ PUTREG(R12, r12);
+ PUTREG(R13, r13);
+ PUTREG(R14, r14);
+ PUTREG(R15, r15);
+#endif
+
+ sc.cr2 = fi->cr2;
+ sc.err = fi->error_code;
+ sc.trapno = fi->trap_no;
+ PUTREG(IP, ip);
+ PUTREG(CS, cs);
+ PUTREG(EFLAGS, flags);
+#ifdef CONFIG_X86_32
+ PUTREG(SP, sp_at_signal);
+ PUTREG(SS, ss);
+#endif
+#undef PUTREG
+ sc.oldmask = mask;
+ sc.fpstate = to_fp;
+
+ err = copy_to_user(to, &sc, sizeof(struct sigcontext));
+ if (err)
+ return 1;
+
+ pid = userspace_pid[current_thread_info()->cpu];
+
+#ifdef CONFIG_X86_32
+ if (have_fpx_regs) {
+ struct user_fxsr_struct fpx;
+
+ err = save_fpx_registers(pid, (unsigned long *) &fpx);
+ if (err < 0){
+ printk(KERN_ERR "copy_sc_to_user - save_fpx_registers "
+ "failed, errno = %d\n", err);
+ return 1;
+ }
+
+ err = convert_fxsr_to_user(to_fp, &fpx);
+ if (err)
+ return 1;
+
+ err |= __put_user(fpx.swd, &to_fp->status);
+ err |= __put_user(X86_FXSR_MAGIC, &to_fp->magic);
+ if (err)
+ return 1;
+
+ if (copy_to_user(&to_fp->_fxsr_env[0], &fpx,
+ sizeof(struct user_fxsr_struct)))
+ return 1;
+ } else
+#endif
+ {
+ struct user_i387_struct fp;
+
+ err = save_fp_registers(pid, (unsigned long *) &fp);
+ if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
+ return 1;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_X86_32
+static int copy_ucontext_to_user(struct ucontext __user *uc,
+ struct _fpstate __user *fp, sigset_t *set,
+ unsigned long sp)
+{
+ int err = 0;
+
+ err |= put_user(current->sas_ss_sp, &uc->uc_stack.ss_sp);
+ err |= put_user(sas_ss_flags(sp), &uc->uc_stack.ss_flags);
+ err |= put_user(current->sas_ss_size, &uc->uc_stack.ss_size);
+ err |= copy_sc_to_user(&uc->uc_mcontext, fp, ¤t->thread.regs, 0);
+ err |= copy_to_user(&uc->uc_sigmask, set, sizeof(*set));
+ return err;
+}
+
+struct sigframe
+{
+ char __user *pretcode;
+ int sig;
+ struct sigcontext sc;
+ struct _fpstate fpstate;
+ unsigned long extramask[_NSIG_WORDS-1];
+ char retcode[8];
+};
+
+struct rt_sigframe
+{
+ char __user *pretcode;
+ int sig;
+ struct siginfo __user *pinfo;
+ void __user *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ struct _fpstate fpstate;
+ char retcode[8];
+};
+
+int setup_signal_stack_sc(unsigned long stack_top, int sig,
+ struct k_sigaction *ka, struct pt_regs *regs,
+ sigset_t *mask)
+{
+ struct sigframe __user *frame;
+ void __user *restorer;
+ int err = 0;
+
+ /* This is the same calculation as i386 - ((sp + 4) & 15) == 0 */
+ stack_top = ((stack_top + 4) & -16UL) - 4;
+ frame = (struct sigframe __user *) stack_top - 1;
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ return 1;
+
+ restorer = frame->retcode;
+ if (ka->sa.sa_flags & SA_RESTORER)
+ restorer = ka->sa.sa_restorer;
+
+ err |= __put_user(restorer, &frame->pretcode);
+ err |= __put_user(sig, &frame->sig);
+ err |= copy_sc_to_user(&frame->sc, &frame->fpstate, regs, mask->sig[0]);
+ if (_NSIG_WORDS > 1)
+ err |= __copy_to_user(&frame->extramask, &mask->sig[1],
+ sizeof(frame->extramask));
+
+ /*
+ * This is popl %eax ; movl $,%eax ; int $0x80
+ *
+ * WE DO NOT USE IT ANY MORE! It's only left here for historical
+ * reasons and because gdb uses it as a signature to notice
+ * signal handler stack frames.
+ */
+ err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
+ err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2));
+ err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
+
+ if (err)
+ return err;
+
+ PT_REGS_SP(regs) = (unsigned long) frame;
+ PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
+ PT_REGS_EAX(regs) = (unsigned long) sig;
+ PT_REGS_EDX(regs) = (unsigned long) 0;
+ PT_REGS_ECX(regs) = (unsigned long) 0;
+
+ if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED))
+ ptrace_notify(SIGTRAP);
+ return 0;
+}
+
+int setup_signal_stack_si(unsigned long stack_top, int sig,
+ struct k_sigaction *ka, struct pt_regs *regs,
+ siginfo_t *info, sigset_t *mask)
+{
+ struct rt_sigframe __user *frame;
+ void __user *restorer;
+ int err = 0;
+
+ stack_top &= -8UL;
+ frame = (struct rt_sigframe __user *) stack_top - 1;
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ return 1;
+
+ restorer = frame->retcode;
+ if (ka->sa.sa_flags & SA_RESTORER)
+ restorer = ka->sa.sa_restorer;
+
+ err |= __put_user(restorer, &frame->pretcode);
+ err |= __put_user(sig, &frame->sig);
+ err |= __put_user(&frame->info, &frame->pinfo);
+ err |= __put_user(&frame->uc, &frame->puc);
+ err |= copy_siginfo_to_user(&frame->info, info);
+ err |= copy_ucontext_to_user(&frame->uc, &frame->fpstate, mask,
+ PT_REGS_SP(regs));
+
+ /*
+ * This is movl $,%eax ; int $0x80
+ *
+ * WE DO NOT USE IT ANY MORE! It's only left here for historical
+ * reasons and because gdb uses it as a signature to notice
+ * signal handler stack frames.
+ */
+ err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
+ err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1));
+ err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
+
+ if (err)
+ return err;
+
+ PT_REGS_SP(regs) = (unsigned long) frame;
+ PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
+ PT_REGS_EAX(regs) = (unsigned long) sig;
+ PT_REGS_EDX(regs) = (unsigned long) &frame->info;
+ PT_REGS_ECX(regs) = (unsigned long) &frame->uc;
+
+ if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED))
+ ptrace_notify(SIGTRAP);
+ return 0;
+}
+
+long sys_sigreturn(struct pt_regs *regs)
+{
+ unsigned long sp = PT_REGS_SP(¤t->thread.regs);
+ struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
+ sigset_t set;
+ struct sigcontext __user *sc = &frame->sc;
+ unsigned long __user *oldmask = &sc->oldmask;
+ unsigned long __user *extramask = frame->extramask;
+ int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long);
+
+ if (copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) ||
+ copy_from_user(&set.sig[1], extramask, sig_size))
+ goto segfault;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ set_current_blocked(&set);
+
+ if (copy_sc_from_user(¤t->thread.regs, sc))
+ goto segfault;
+
+ /* Avoid ERESTART handling */
+ PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
+ return PT_REGS_SYSCALL_RET(¤t->thread.regs);
+
+ segfault:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+#else
+
+struct rt_sigframe
+{
+ char __user *pretcode;
+ struct ucontext uc;
+ struct siginfo info;
+ struct _fpstate fpstate;
+};
+
+int setup_signal_stack_si(unsigned long stack_top, int sig,
+ struct k_sigaction *ka, struct pt_regs * regs,
+ siginfo_t *info, sigset_t *set)
+{
+ struct rt_sigframe __user *frame;
+ int err = 0;
+ struct task_struct *me = current;
+
+ frame = (struct rt_sigframe __user *)
+ round_down(stack_top - sizeof(struct rt_sigframe), 16);
+ /* Subtract 128 for a red zone and 8 for proper alignment */
+ frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8);
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto out;
+
+ if (ka->sa.sa_flags & SA_SIGINFO) {
+ err |= copy_siginfo_to_user(&frame->info, info);
+ if (err)
+ goto out;
+ }
+
+ /* Create the ucontext. */
+ err |= __put_user(0, &frame->uc.uc_flags);
+ err |= __put_user(0, &frame->uc.uc_link);
+ err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(PT_REGS_SP(regs)),
+ &frame->uc.uc_stack.ss_flags);
+ err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= copy_sc_to_user(&frame->uc.uc_mcontext, &frame->fpstate, regs,
+ set->sig[0]);
+ err |= __put_user(&frame->fpstate, &frame->uc.uc_mcontext.fpstate);
+ if (sizeof(*set) == 16) {
+ __put_user(set->sig[0], &frame->uc.uc_sigmask.sig[0]);
+ __put_user(set->sig[1], &frame->uc.uc_sigmask.sig[1]);
+ }
+ else
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set,
+ sizeof(*set));
+
+ /*
+ * Set up to return from userspace. If provided, use a stub
+ * already in userspace.
+ */
+ /* x86-64 should always use SA_RESTORER. */
+ if (ka->sa.sa_flags & SA_RESTORER)
+ err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
+ else
+ /* could use a vstub here */
+ return err;
+
+ if (err)
+ return err;
+
+ /* Set up registers for signal handler */
+ {
+ struct exec_domain *ed = current_thread_info()->exec_domain;
+ if (unlikely(ed && ed->signal_invmap && sig < 32))
+ sig = ed->signal_invmap[sig];
+ }
+
+ PT_REGS_SP(regs) = (unsigned long) frame;
+ PT_REGS_RDI(regs) = sig;
+ /* In case the signal handler was declared without prototypes */
+ PT_REGS_RAX(regs) = 0;
+
+ /*
+ * This also works for non SA_SIGINFO handlers because they expect the
+ * next argument after the signal number on the stack.
+ */
+ PT_REGS_RSI(regs) = (unsigned long) &frame->info;
+ PT_REGS_RDX(regs) = (unsigned long) &frame->uc;
+ PT_REGS_RIP(regs) = (unsigned long) ka->sa.sa_handler;
+ out:
+ return err;
+}
+#endif
+
+long sys_rt_sigreturn(struct pt_regs *regs)
+{
+ unsigned long sp = PT_REGS_SP(¤t->thread.regs);
+ struct rt_sigframe __user *frame =
+ (struct rt_sigframe __user *)(sp - sizeof(long));
+ struct ucontext __user *uc = &frame->uc;
+ sigset_t set;
+
+ if (copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
+ goto segfault;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ set_current_blocked(&set);
+
+ if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext))
+ goto segfault;
+
+ /* Avoid ERESTART handling */
+ PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
+ return PT_REGS_SYSCALL_RET(¤t->thread.regs);
+
+ segfault:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+#ifdef CONFIG_X86_32
+long ptregs_sigreturn(void)
+{
+ return sys_sigreturn(NULL);
+}
+long ptregs_rt_sigreturn(void)
+{
+ return sys_rt_sigreturn(NULL);
+}
+#endif
+++ /dev/null
-/*
- * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <linux/ptrace.h>
-#include <asm/unistd.h>
-#include <asm/uaccess.h>
-#include <asm/ucontext.h>
-#include "frame_kern.h"
-#include "skas.h"
-
-/*
- * FPU tag word conversions.
- */
-
-static inline unsigned short twd_i387_to_fxsr(unsigned short twd)
-{
- unsigned int tmp; /* to avoid 16 bit prefixes in the code */
-
- /* Transform each pair of bits into 01 (valid) or 00 (empty) */
- tmp = ~twd;
- tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
- /* and move the valid bits to the lower byte. */
- tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
- tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
- tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
- return tmp;
-}
-
-static inline unsigned long twd_fxsr_to_i387(struct user_fxsr_struct *fxsave)
-{
- struct _fpxreg *st = NULL;
- unsigned long twd = (unsigned long) fxsave->twd;
- unsigned long tag;
- unsigned long ret = 0xffff0000;
- int i;
-
-#define FPREG_ADDR(f, n) ((char *)&(f)->st_space + (n) * 16)
-
- for (i = 0; i < 8; i++) {
- if (twd & 0x1) {
- st = (struct _fpxreg *) FPREG_ADDR(fxsave, i);
-
- switch (st->exponent & 0x7fff) {
- case 0x7fff:
- tag = 2; /* Special */
- break;
- case 0x0000:
- if ( !st->significand[0] &&
- !st->significand[1] &&
- !st->significand[2] &&
- !st->significand[3] ) {
- tag = 1; /* Zero */
- } else {
- tag = 2; /* Special */
- }
- break;
- default:
- if (st->significand[3] & 0x8000) {
- tag = 0; /* Valid */
- } else {
- tag = 2; /* Special */
- }
- break;
- }
- } else {
- tag = 3; /* Empty */
- }
- ret |= (tag << (2 * i));
- twd = twd >> 1;
- }
- return ret;
-}
-
-static int convert_fxsr_to_user(struct _fpstate __user *buf,
- struct user_fxsr_struct *fxsave)
-{
- unsigned long env[7];
- struct _fpreg __user *to;
- struct _fpxreg *from;
- int i;
-
- env[0] = (unsigned long)fxsave->cwd | 0xffff0000ul;
- env[1] = (unsigned long)fxsave->swd | 0xffff0000ul;
- env[2] = twd_fxsr_to_i387(fxsave);
- env[3] = fxsave->fip;
- env[4] = fxsave->fcs | ((unsigned long)fxsave->fop << 16);
- env[5] = fxsave->foo;
- env[6] = fxsave->fos;
-
- if (__copy_to_user(buf, env, 7 * sizeof(unsigned long)))
- return 1;
-
- to = &buf->_st[0];
- from = (struct _fpxreg *) &fxsave->st_space[0];
- for (i = 0; i < 8; i++, to++, from++) {
- unsigned long __user *t = (unsigned long __user *)to;
- unsigned long *f = (unsigned long *)from;
-
- if (__put_user(*f, t) ||
- __put_user(*(f + 1), t + 1) ||
- __put_user(from->exponent, &to->exponent))
- return 1;
- }
- return 0;
-}
-
-static int convert_fxsr_from_user(struct user_fxsr_struct *fxsave,
- struct _fpstate __user *buf)
-{
- unsigned long env[7];
- struct _fpxreg *to;
- struct _fpreg __user *from;
- int i;
-
- if (copy_from_user( env, buf, 7 * sizeof(long)))
- return 1;
-
- fxsave->cwd = (unsigned short)(env[0] & 0xffff);
- fxsave->swd = (unsigned short)(env[1] & 0xffff);
- fxsave->twd = twd_i387_to_fxsr((unsigned short)(env[2] & 0xffff));
- fxsave->fip = env[3];
- fxsave->fop = (unsigned short)((env[4] & 0xffff0000ul) >> 16);
- fxsave->fcs = (env[4] & 0xffff);
- fxsave->foo = env[5];
- fxsave->fos = env[6];
-
- to = (struct _fpxreg *) &fxsave->st_space[0];
- from = &buf->_st[0];
- for (i = 0; i < 8; i++, to++, from++) {
- unsigned long *t = (unsigned long *)to;
- unsigned long __user *f = (unsigned long __user *)from;
-
- if (__get_user(*t, f) ||
- __get_user(*(t + 1), f + 1) ||
- __get_user(to->exponent, &from->exponent))
- return 1;
- }
- return 0;
-}
-
-extern int have_fpx_regs;
-
-static int copy_sc_from_user(struct pt_regs *regs,
- struct sigcontext __user *from)
-{
- struct sigcontext sc;
- int err, pid;
-
- err = copy_from_user(&sc, from, sizeof(sc));
- if (err)
- return err;
-
- pid = userspace_pid[current_thread_info()->cpu];
-
-#define GETREG(regno, regname) regs->regs.gp[HOST_##regno] = sc.regname
-
- GETREG(GS, gs);
- GETREG(FS, fs);
- GETREG(ES, es);
- GETREG(DS, ds);
- GETREG(DI, di);
- GETREG(SI, si);
- GETREG(BP, bp);
- GETREG(SP, sp);
- GETREG(BX, bx);
- GETREG(DX, dx);
- GETREG(CX, cx);
- GETREG(AX, ax);
- GETREG(IP, ip);
- GETREG(CS, cs);
- GETREG(EFLAGS, flags);
- GETREG(SS, ss);
-
-#undef GETREG
- if (have_fpx_regs) {
- struct user_fxsr_struct fpx;
-
- err = copy_from_user(&fpx,
- &((struct _fpstate __user *)sc.fpstate)->_fxsr_env[0],
- sizeof(struct user_fxsr_struct));
- if (err)
- return 1;
-
- err = convert_fxsr_from_user(&fpx, sc.fpstate);
- if (err)
- return 1;
-
- err = restore_fpx_registers(pid, (unsigned long *) &fpx);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - "
- "restore_fpx_registers failed, errno = %d\n",
- -err);
- return 1;
- }
- } else {
- struct user_i387_struct fp;
-
- err = copy_from_user(&fp, sc.fpstate,
- sizeof(struct user_i387_struct));
- if (err)
- return 1;
-
- err = restore_fp_registers(pid, (unsigned long *) &fp);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - "
- "restore_fp_registers failed, errno = %d\n",
- -err);
- return 1;
- }
- }
-
- return 0;
-}
-
-static int copy_sc_to_user(struct sigcontext __user *to,
- struct _fpstate __user *to_fp, struct pt_regs *regs)
-{
- struct sigcontext sc;
- struct faultinfo * fi = ¤t->thread.arch.faultinfo;
- int err, pid;
- memset(&sc, 0, sizeof(struct sigcontext));
-
- sc.gs = REGS_GS(regs->regs.gp);
- sc.fs = REGS_FS(regs->regs.gp);
- sc.es = REGS_ES(regs->regs.gp);
- sc.ds = REGS_DS(regs->regs.gp);
- sc.di = REGS_EDI(regs->regs.gp);
- sc.si = REGS_ESI(regs->regs.gp);
- sc.bp = REGS_EBP(regs->regs.gp);
- sc.sp = REGS_SP(regs->regs.gp);
- sc.bx = REGS_EBX(regs->regs.gp);
- sc.dx = REGS_EDX(regs->regs.gp);
- sc.cx = REGS_ECX(regs->regs.gp);
- sc.ax = REGS_EAX(regs->regs.gp);
- sc.ip = REGS_IP(regs->regs.gp);
- sc.cs = REGS_CS(regs->regs.gp);
- sc.flags = REGS_EFLAGS(regs->regs.gp);
- sc.sp_at_signal = regs->regs.gp[UESP];
- sc.ss = regs->regs.gp[SS];
- sc.cr2 = fi->cr2;
- sc.err = fi->error_code;
- sc.trapno = fi->trap_no;
-
- to_fp = (to_fp ? to_fp : (struct _fpstate __user *) (to + 1));
- sc.fpstate = to_fp;
-
- pid = userspace_pid[current_thread_info()->cpu];
- if (have_fpx_regs) {
- struct user_fxsr_struct fpx;
-
- err = save_fpx_registers(pid, (unsigned long *) &fpx);
- if (err < 0){
- printk(KERN_ERR "copy_sc_to_user - save_fpx_registers "
- "failed, errno = %d\n", err);
- return 1;
- }
-
- err = convert_fxsr_to_user(to_fp, &fpx);
- if (err)
- return 1;
-
- err |= __put_user(fpx.swd, &to_fp->status);
- err |= __put_user(X86_FXSR_MAGIC, &to_fp->magic);
- if (err)
- return 1;
-
- if (copy_to_user(&to_fp->_fxsr_env[0], &fpx,
- sizeof(struct user_fxsr_struct)))
- return 1;
- }
- else {
- struct user_i387_struct fp;
-
- err = save_fp_registers(pid, (unsigned long *) &fp);
- if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
- return 1;
- }
-
- return copy_to_user(to, &sc, sizeof(sc));
-}
-
-static int copy_ucontext_to_user(struct ucontext __user *uc,
- struct _fpstate __user *fp, sigset_t *set,
- unsigned long sp)
-{
- int err = 0;
-
- err |= put_user(current->sas_ss_sp, &uc->uc_stack.ss_sp);
- err |= put_user(sas_ss_flags(sp), &uc->uc_stack.ss_flags);
- err |= put_user(current->sas_ss_size, &uc->uc_stack.ss_size);
- err |= copy_sc_to_user(&uc->uc_mcontext, fp, ¤t->thread.regs);
- err |= copy_to_user(&uc->uc_sigmask, set, sizeof(*set));
- return err;
-}
-
-struct sigframe
-{
- char __user *pretcode;
- int sig;
- struct sigcontext sc;
- struct _fpstate fpstate;
- unsigned long extramask[_NSIG_WORDS-1];
- char retcode[8];
-};
-
-struct rt_sigframe
-{
- char __user *pretcode;
- int sig;
- struct siginfo __user *pinfo;
- void __user *puc;
- struct siginfo info;
- struct ucontext uc;
- struct _fpstate fpstate;
- char retcode[8];
-};
-
-int setup_signal_stack_sc(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs *regs,
- sigset_t *mask)
-{
- struct sigframe __user *frame;
- void __user *restorer;
- int err = 0;
-
- /* This is the same calculation as i386 - ((sp + 4) & 15) == 0 */
- stack_top = ((stack_top + 4) & -16UL) - 4;
- frame = (struct sigframe __user *) stack_top - 1;
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- return 1;
-
- restorer = frame->retcode;
- if (ka->sa.sa_flags & SA_RESTORER)
- restorer = ka->sa.sa_restorer;
-
- err |= __put_user(restorer, &frame->pretcode);
- err |= __put_user(sig, &frame->sig);
- err |= copy_sc_to_user(&frame->sc, NULL, regs);
- err |= __put_user(mask->sig[0], &frame->sc.oldmask);
- if (_NSIG_WORDS > 1)
- err |= __copy_to_user(&frame->extramask, &mask->sig[1],
- sizeof(frame->extramask));
-
- /*
- * This is popl %eax ; movl $,%eax ; int $0x80
- *
- * WE DO NOT USE IT ANY MORE! It's only left here for historical
- * reasons and because gdb uses it as a signature to notice
- * signal handler stack frames.
- */
- err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
- err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
-
- if (err)
- return err;
-
- PT_REGS_SP(regs) = (unsigned long) frame;
- PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
- PT_REGS_EAX(regs) = (unsigned long) sig;
- PT_REGS_EDX(regs) = (unsigned long) 0;
- PT_REGS_ECX(regs) = (unsigned long) 0;
-
- if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED))
- ptrace_notify(SIGTRAP);
- return 0;
-}
-
-int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs *regs,
- siginfo_t *info, sigset_t *mask)
-{
- struct rt_sigframe __user *frame;
- void __user *restorer;
- int err = 0;
-
- stack_top &= -8UL;
- frame = (struct rt_sigframe __user *) stack_top - 1;
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- return 1;
-
- restorer = frame->retcode;
- if (ka->sa.sa_flags & SA_RESTORER)
- restorer = ka->sa.sa_restorer;
-
- err |= __put_user(restorer, &frame->pretcode);
- err |= __put_user(sig, &frame->sig);
- err |= __put_user(&frame->info, &frame->pinfo);
- err |= __put_user(&frame->uc, &frame->puc);
- err |= copy_siginfo_to_user(&frame->info, info);
- err |= copy_ucontext_to_user(&frame->uc, &frame->fpstate, mask,
- PT_REGS_SP(regs));
-
- /*
- * This is movl $,%eax ; int $0x80
- *
- * WE DO NOT USE IT ANY MORE! It's only left here for historical
- * reasons and because gdb uses it as a signature to notice
- * signal handler stack frames.
- */
- err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
- err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
-
- if (err)
- return err;
-
- PT_REGS_SP(regs) = (unsigned long) frame;
- PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler;
- PT_REGS_EAX(regs) = (unsigned long) sig;
- PT_REGS_EDX(regs) = (unsigned long) &frame->info;
- PT_REGS_ECX(regs) = (unsigned long) &frame->uc;
-
- if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED))
- ptrace_notify(SIGTRAP);
- return 0;
-}
-
-long sys_sigreturn(struct pt_regs regs)
-{
- unsigned long sp = PT_REGS_SP(¤t->thread.regs);
- struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
- sigset_t set;
- struct sigcontext __user *sc = &frame->sc;
- unsigned long __user *oldmask = &sc->oldmask;
- unsigned long __user *extramask = frame->extramask;
- int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long);
-
- if (copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) ||
- copy_from_user(&set.sig[1], extramask, sig_size))
- goto segfault;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- set_current_blocked(&set);
-
- if (copy_sc_from_user(¤t->thread.regs, sc))
- goto segfault;
-
- /* Avoid ERESTART handling */
- PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
- return PT_REGS_SYSCALL_RET(¤t->thread.regs);
-
- segfault:
- force_sig(SIGSEGV, current);
- return 0;
-}
-
-long sys_rt_sigreturn(struct pt_regs regs)
-{
- unsigned long sp = PT_REGS_SP(¤t->thread.regs);
- struct rt_sigframe __user *frame =
- (struct rt_sigframe __user *) (sp - 4);
- sigset_t set;
- struct ucontext __user *uc = &frame->uc;
- int sig_size = _NSIG_WORDS * sizeof(unsigned long);
-
- if (copy_from_user(&set, &uc->uc_sigmask, sig_size))
- goto segfault;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- set_current_blocked(&set);
-
- if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext))
- goto segfault;
-
- /* Avoid ERESTART handling */
- PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
- return PT_REGS_SYSCALL_RET(¤t->thread.regs);
-
- segfault:
- force_sig(SIGSEGV, current);
- return 0;
-}
+++ /dev/null
-/*
- * Copyright (C) 2003 PathScale, Inc.
- * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <linux/personality.h>
-#include <linux/ptrace.h>
-#include <linux/kernel.h>
-#include <asm/unistd.h>
-#include <asm/uaccess.h>
-#include <asm/ucontext.h>
-#include "frame_kern.h"
-#include "skas.h"
-
-static int copy_sc_from_user(struct pt_regs *regs,
- struct sigcontext __user *from)
-{
- struct sigcontext sc;
- struct user_i387_struct fp;
- void __user *buf;
- int err;
-
- err = copy_from_user(&sc, from, sizeof(sc));
- if (err)
- return err;
-
-#define GETREG(regno, regname) regs->regs.gp[HOST_##regno] = sc.regname
-
- GETREG(R8, r8);
- GETREG(R9, r9);
- GETREG(R10, r10);
- GETREG(R11, r11);
- GETREG(R12, r12);
- GETREG(R13, r13);
- GETREG(R14, r14);
- GETREG(R15, r15);
- GETREG(DI, di);
- GETREG(SI, si);
- GETREG(BP, bp);
- GETREG(BX, bx);
- GETREG(DX, dx);
- GETREG(AX, ax);
- GETREG(CX, cx);
- GETREG(SP, sp);
- GETREG(IP, ip);
- GETREG(EFLAGS, flags);
- GETREG(CS, cs);
-#undef GETREG
-
- buf = sc.fpstate;
-
- err = copy_from_user(&fp, buf, sizeof(struct user_i387_struct));
- if (err)
- return 1;
-
- err = restore_fp_registers(userspace_pid[current_thread_info()->cpu],
- (unsigned long *) &fp);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - "
- "restore_fp_registers failed, errno = %d\n",
- -err);
- return 1;
- }
-
- return 0;
-}
-
-static int copy_sc_to_user(struct sigcontext __user *to,
- struct _fpstate __user *to_fp, struct pt_regs *regs,
- unsigned long mask)
-{
- struct faultinfo * fi = ¤t->thread.arch.faultinfo;
- struct sigcontext sc;
- struct user_i387_struct fp;
- int err = 0;
- memset(&sc, 0, sizeof(struct sigcontext));
-
-#define PUTREG(regno, regname) sc.regname = regs->regs.gp[HOST_##regno]
-
- PUTREG(DI, di);
- PUTREG(SI, si);
- PUTREG(BP, bp);
- PUTREG(SP, sp);
- PUTREG(BX, bx);
- PUTREG(DX, dx);
- PUTREG(CX, cx);
- PUTREG(AX, ax);
- PUTREG(R8, r8);
- PUTREG(R9, r9);
- PUTREG(R10, r10);
- PUTREG(R11, r11);
- PUTREG(R12, r12);
- PUTREG(R13, r13);
- PUTREG(R14, r14);
- PUTREG(R15, r15);
- PUTREG(CS, cs); /* XXX x86_64 doesn't do this */
-
- sc.cr2 = fi->cr2;
- sc.err = fi->error_code;
- sc.trapno = fi->trap_no;
-
- PUTREG(IP, ip);
- PUTREG(EFLAGS, flags);
-#undef PUTREG
-
- sc.oldmask = mask;
-
- err = copy_to_user(to, &sc, sizeof(struct sigcontext));
- if (err)
- return 1;
-
- err = save_fp_registers(userspace_pid[current_thread_info()->cpu],
- (unsigned long *) &fp);
- if (err < 0) {
- printk(KERN_ERR "copy_sc_from_user - restore_fp_registers "
- "failed, errno = %d\n", -err);
- return 1;
- }
-
- if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct)))
- return 1;
-
- return err;
-}
-
-struct rt_sigframe
-{
- char __user *pretcode;
- struct ucontext uc;
- struct siginfo info;
- struct _fpstate fpstate;
-};
-
-int setup_signal_stack_si(unsigned long stack_top, int sig,
- struct k_sigaction *ka, struct pt_regs * regs,
- siginfo_t *info, sigset_t *set)
-{
- struct rt_sigframe __user *frame;
- int err = 0;
- struct task_struct *me = current;
-
- frame = (struct rt_sigframe __user *)
- round_down(stack_top - sizeof(struct rt_sigframe), 16);
- /* Subtract 128 for a red zone and 8 for proper alignment */
- frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8);
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto out;
-
- if (ka->sa.sa_flags & SA_SIGINFO) {
- err |= copy_siginfo_to_user(&frame->info, info);
- if (err)
- goto out;
- }
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(PT_REGS_RSP(regs)),
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= copy_sc_to_user(&frame->uc.uc_mcontext, &frame->fpstate, regs,
- set->sig[0]);
- err |= __put_user(&frame->fpstate, &frame->uc.uc_mcontext.fpstate);
- if (sizeof(*set) == 16) {
- __put_user(set->sig[0], &frame->uc.uc_sigmask.sig[0]);
- __put_user(set->sig[1], &frame->uc.uc_sigmask.sig[1]);
- }
- else
- err |= __copy_to_user(&frame->uc.uc_sigmask, set,
- sizeof(*set));
-
- /*
- * Set up to return from userspace. If provided, use a stub
- * already in userspace.
- */
- /* x86-64 should always use SA_RESTORER. */
- if (ka->sa.sa_flags & SA_RESTORER)
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
- else
- /* could use a vstub here */
- return err;
-
- if (err)
- return err;
-
- /* Set up registers for signal handler */
- {
- struct exec_domain *ed = current_thread_info()->exec_domain;
- if (unlikely(ed && ed->signal_invmap && sig < 32))
- sig = ed->signal_invmap[sig];
- }
-
- PT_REGS_RSP(regs) = (unsigned long) frame;
- PT_REGS_RDI(regs) = sig;
- /* In case the signal handler was declared without prototypes */
- PT_REGS_RAX(regs) = 0;
-
- /*
- * This also works for non SA_SIGINFO handlers because they expect the
- * next argument after the signal number on the stack.
- */
- PT_REGS_RSI(regs) = (unsigned long) &frame->info;
- PT_REGS_RDX(regs) = (unsigned long) &frame->uc;
- PT_REGS_RIP(regs) = (unsigned long) ka->sa.sa_handler;
- out:
- return err;
-}
-
-long sys_rt_sigreturn(struct pt_regs *regs)
-{
- unsigned long sp = PT_REGS_SP(¤t->thread.regs);
- struct rt_sigframe __user *frame =
- (struct rt_sigframe __user *)(sp - 8);
- struct ucontext __user *uc = &frame->uc;
- sigset_t set;
-
- if (copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
- goto segfault;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- set_current_blocked(&set);
-
- if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext))
- goto segfault;
-
- /* Avoid ERESTART handling */
- PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1;
- return PT_REGS_SYSCALL_RET(¤t->thread.regs);
-
- segfault:
- force_sig(SIGSEGV, current);
- return 0;
-}
#define ptregs_execve sys_execve
#define ptregs_iopl sys_iopl
#define ptregs_vm86old sys_vm86old
-#define ptregs_sigreturn sys_sigreturn
#define ptregs_clone sys_clone
#define ptregs_vm86 sys_vm86
-#define ptregs_rt_sigreturn sys_rt_sigreturn
#define ptregs_sigaltstack sys_sigaltstack
#define ptregs_vfork sys_vfork
current->comm, print_tainted(), init_utsname()->release);
printk(KERN_INFO "RIP: %04lx:[<%016lx>]\n", PT_REGS_CS(regs) & 0xffff,
PT_REGS_RIP(regs));
- printk(KERN_INFO "RSP: %016lx EFLAGS: %08lx\n", PT_REGS_RSP(regs),
+ printk(KERN_INFO "RSP: %016lx EFLAGS: %08lx\n", PT_REGS_SP(regs),
PT_REGS_EFLAGS(regs));
printk(KERN_INFO "RAX: %016lx RBX: %016lx RCX: %016lx\n",
PT_REGS_RAX(regs), PT_REGS_RBX(regs), PT_REGS_RCX(regs));
projects / openwrt / staging / blogic.git / commitdiff