1 files changed, 0 insertions, 452 deletions

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
deleted file mode 100644
index c439ac9ced09..000000000000
--- a/arch/s390/kernel/compat_signal.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
- *    Copyright IBM Corp. 2000, 2006
- *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- *               Gerhard Tonn (ton@de.ibm.com)                  
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  1997-11-28  Modified for POSIX.1b signals by Richard Henderson
- */
-
-#include <linux/compat.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/tty.h>
-#include <linux/personality.h>
-#include <linux/binfmts.h>
-#include <asm/ucontext.h>
-#include <asm/uaccess.h>
-#include <asm/lowcore.h>
-#include <asm/switch_to.h>
-#include "compat_linux.h"
-#include "compat_ptrace.h"
-#include "entry.h"
-
-typedef struct 
-{
-	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
-	struct sigcontext32 sc;
-	_sigregs32 sregs;
-	int signo;
-	__u32 gprs_high[NUM_GPRS];
-	__u8 retcode[S390_SYSCALL_SIZE];
-} sigframe32;
-
-typedef struct 
-{
-	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
-	__u8 retcode[S390_SYSCALL_SIZE];
-	compat_siginfo_t info;
-	struct ucontext32 uc;
-	__u32 gprs_high[NUM_GPRS];
-} rt_sigframe32;
-
-int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
-{
-	int err;
-
-	/* 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_RT >> 16: /* This is not generated by the kernel as of now.  */
-		case __SI_MESGQ >> 16:
-			err |= __put_user(from->si_int, &to->si_int);
-			/* fallthrough */
-		case __SI_KILL >> 16:
-			err |= __put_user(from->si_pid, &to->si_pid);
-			err |= __put_user(from->si_uid, &to->si_uid);
-			break;
-		case __SI_CHLD >> 16:
-			err |= __put_user(from->si_pid, &to->si_pid);
-			err |= __put_user(from->si_uid, &to->si_uid);
-			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);
-			break;
-		case __SI_FAULT >> 16:
-			err |= __put_user((unsigned long) from->si_addr,
-					  &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);
-			err |= __put_user(from->si_int, &to->si_int);
-			break;
-		default:
-			break;
-		}
-	}
-	return err;
-}
-
-int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
-{
-	int err;
-	u32 tmp;
-
-	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_RT >> 16: /* This is not generated by the kernel as of now.  */
-		case __SI_MESGQ >> 16:
-			err |= __get_user(to->si_int, &from->si_int);
-			/* fallthrough */
-		case __SI_KILL >> 16:
-			err |= __get_user(to->si_pid, &from->si_pid);
-			err |= __get_user(to->si_uid, &from->si_uid);
-			break;
-		case __SI_CHLD >> 16:
-			err |= __get_user(to->si_pid, &from->si_pid);
-			err |= __get_user(to->si_uid, &from->si_uid);
-			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);
-			break;
-		case __SI_FAULT >> 16:
-			err |= __get_user(tmp, &from->si_addr);
-			to->si_addr = (void __force __user *)
-				(u64) (tmp & PSW32_ADDR_INSN);
-			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_TIMER >> 16:
-			err |= __get_user(to->si_tid, &from->si_tid);
-			err |= __get_user(to->si_overrun, &from->si_overrun);
-			err |= __get_user(to->si_int, &from->si_int);
-			break;
-		default:
-			break;
-		}
-	}
-	return err;
-}
-
-static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
-{
-	_s390_regs_common32 regs32;
-	int err, i;
-
-	regs32.psw.mask = psw32_user_bits |
-		((__u32)(regs->psw.mask >> 32) & PSW32_MASK_USER);
-	regs32.psw.addr = (__u32) regs->psw.addr |
-		(__u32)(regs->psw.mask & PSW_MASK_BA);
-	for (i = 0; i < NUM_GPRS; i++)
-		regs32.gprs[i] = (__u32) regs->gprs[i];
-	save_access_regs(current->thread.acrs);
-	memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs));
-	err = __copy_to_user(&sregs->regs, &regs32, sizeof(regs32));
-	if (err)
-		return err;
-	save_fp_regs(&current->thread.fp_regs);
-	/* s390_fp_regs and _s390_fp_regs32 are the same ! */
-	return __copy_to_user(&sregs->fpregs, &current->thread.fp_regs,
-			      sizeof(_s390_fp_regs32));
-}
-
-static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
-{
-	_s390_regs_common32 regs32;
-	int err, i;
-
-	/* Alwys make any pending restarted system call return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-	err = __copy_from_user(&regs32, &sregs->regs, sizeof(regs32));
-	if (err)
-		return err;
-	regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
-		(__u64)(regs32.psw.mask & PSW32_MASK_USER) << 32 |
-		(__u64)(regs32.psw.addr & PSW32_ADDR_AMODE);
-	/* Check for invalid user address space control. */
-	if ((regs->psw.mask & PSW_MASK_ASC) >= (psw_kernel_bits & PSW_MASK_ASC))
-		regs->psw.mask = (psw_user_bits & PSW_MASK_ASC) |
-			(regs->psw.mask & ~PSW_MASK_ASC);
-	regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN);
-	for (i = 0; i < NUM_GPRS; i++)
-		regs->gprs[i] = (__u64) regs32.gprs[i];
-	memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs));
-	restore_access_regs(current->thread.acrs);
-
-	err = __copy_from_user(&current->thread.fp_regs, &sregs->fpregs,
-			       sizeof(_s390_fp_regs32));
-	current->thread.fp_regs.fpc &= FPC_VALID_MASK;
-	if (err)
-		return err;
-
-	restore_fp_regs(&current->thread.fp_regs);
-	clear_thread_flag(TIF_SYSCALL);	/* No longer in a system call */
-	return 0;
-}
-
-static int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
-{
-	__u32 gprs_high[NUM_GPRS];
-	int i;
-
-	for (i = 0; i < NUM_GPRS; i++)
-		gprs_high[i] = regs->gprs[i] >> 32;
-
-	return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high));
-}
-
-static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
-{
-	__u32 gprs_high[NUM_GPRS];
-	int err, i;
-
-	err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high));
-	if (err)
-		return err;
-	for (i = 0; i < NUM_GPRS; i++)
-		*(__u32 *)&regs->gprs[i] = gprs_high[i];
-	return 0;
-}
-
-asmlinkage long sys32_sigreturn(void)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
-	sigset_t set;
-
-	if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
-		goto badframe;
-	set_current_blocked(&set);
-	if (restore_sigregs32(regs, &frame->sregs))
-		goto badframe;
-	if (restore_sigregs_gprs_high(regs, frame->gprs_high))
-		goto badframe;
-	return regs->gprs[2];
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-asmlinkage long sys32_rt_sigreturn(void)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
-	sigset_t set;
-
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-	set_current_blocked(&set);
-	if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
-		goto badframe;
-	if (restore_sigregs_gprs_high(regs, frame->gprs_high))
-		goto badframe;
-	if (compat_restore_altstack(&frame->uc.uc_stack))
-		goto badframe; 
-	return regs->gprs[2];
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}	
-
-/*
- * Set up a signal frame.
- */
-
-
-/*
- * 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 sp;
-
-	/* Default to using normal stack */
-	sp = (unsigned long) A(regs->gprs[15]);
-
-	/* Overflow on alternate signal stack gives SIGSEGV. */
-	if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL))
-		return (void __user *) -1UL;
-
-	/* This is the X/Open sanctioned signal stack switching.  */
-	if (ka->sa.sa_flags & SA_ONSTACK) {
-		if (! sas_ss_flags(sp))
-			sp = current->sas_ss_sp + current->sas_ss_size;
-	}
-
-	return (void __user *)((sp - frame_size) & -8ul);
-}
-
-static inline int map_signal(int sig)
-{
-	if (current_thread_info()->exec_domain
-	    && current_thread_info()->exec_domain->signal_invmap
-	    && sig < 32)
-		return current_thread_info()->exec_domain->signal_invmap[sig];
-        else
-		return sig;
-}
-
-static int setup_frame32(int sig, struct k_sigaction *ka,
-			sigset_t *set, struct pt_regs * regs)
-{
-	sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));
-
-	if (frame == (void __user *) -1UL)
-		goto give_sigsegv;
-
-	if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32))
-		goto give_sigsegv;
-
-	if (save_sigregs32(regs, &frame->sregs))
-		goto give_sigsegv;
-	if (save_sigregs_gprs_high(regs, frame->gprs_high))
-		goto give_sigsegv;
-	if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs))
-		goto give_sigsegv;
-
-	/* Set up to return from userspace.  If provided, use a stub
-	   already in userspace.  */
-	if (ka->sa.sa_flags & SA_RESTORER) {
-		regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE;
-	} else {
-		regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE;
-		if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,
-			       (u16 __force __user *)(frame->retcode)))
-			goto give_sigsegv;
-        }
-
-	/* Set up backchain. */
-	if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
-		goto give_sigsegv;
-
-	/* Set up registers for signal handler */
-	regs->gprs[15] = (__force __u64) frame;
-	/* Force 31 bit amode and default user address space control. */
-	regs->psw.mask = PSW_MASK_BA |
-		(psw_user_bits & PSW_MASK_ASC) |
-		(regs->psw.mask & ~PSW_MASK_ASC);
-	regs->psw.addr = (__force __u64) ka->sa.sa_handler;
-
-	regs->gprs[2] = map_signal(sig);
-	regs->gprs[3] = (__force __u64) &frame->sc;
-
-	/* We forgot to include these in the sigcontext.
-	   To avoid breaking binary compatibility, they are passed as args. */
-	if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
-	    sig == SIGTRAP || sig == SIGFPE) {
-		/* set extra registers only for synchronous signals */
-		regs->gprs[4] = regs->int_code & 127;
-		regs->gprs[5] = regs->int_parm_long;
-		regs->gprs[6] = task_thread_info(current)->last_break;
-	}
-
-	/* Place signal number on stack to allow backtrace from handler.  */
-	if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo))
-		goto give_sigsegv;
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return -EFAULT;
-}
-
-static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
-			   sigset_t *set, struct pt_regs * regs)
-{
-	int err = 0;
-	rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32));
-
-	if (frame == (void __user *) -1UL)
-		goto give_sigsegv;
-
-	if (copy_siginfo_to_user32(&frame->info, info))
-		goto give_sigsegv;
-
-	/* Create the ucontext.  */
-	err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
-	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
-	err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
-	err |= save_sigregs_gprs_high(regs, frame->gprs_high);
-	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) {
-		regs->gprs[14] = (__u64) ka->sa.sa_restorer | PSW32_ADDR_AMODE;
-	} else {
-		regs->gprs[14] = (__u64) frame->retcode | PSW32_ADDR_AMODE;
-		err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,
-				  (u16 __force __user *)(frame->retcode));
-	}
-
-	/* Set up backchain. */
-	if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))
-		goto give_sigsegv;
-
-	/* Set up registers for signal handler */
-	regs->gprs[15] = (__force __u64) frame;
-	/* Force 31 bit amode and default user address space control. */
-	regs->psw.mask = PSW_MASK_BA |
-		(psw_user_bits & PSW_MASK_ASC) |
-		(regs->psw.mask & ~PSW_MASK_ASC);
-	regs->psw.addr = (__u64) ka->sa.sa_handler;
-
-	regs->gprs[2] = map_signal(sig);
-	regs->gprs[3] = (__force __u64) &frame->info;
-	regs->gprs[4] = (__force __u64) &frame->uc;
-	regs->gprs[5] = task_thread_info(current)->last_break;
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return -EFAULT;
-}
-
-/*
- * OK, we're invoking a handler
- */	
-
-void handle_signal32(unsigned long sig, struct k_sigaction *ka,
-		    siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
-{
-	int ret;
-
-	/* Set up the stack frame */
-	if (ka->sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame32(sig, ka, info, oldset, regs);
-	else
-		ret = setup_frame32(sig, ka, oldset, regs);
-	if (ret)
-		return;
-	signal_delivered(sig, info, ka, regs,
-				 test_thread_flag(TIF_SINGLE_STEP));
-}
-