1 files changed, 0 insertions, 420 deletions

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
deleted file mode 100644
index 5a86b9d1da71..000000000000
--- a/arch/s390/kernel/compat_signal.c
+++ /dev/null
@@ -1,420 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *    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/sched/task_stack.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/vdso-symbols.h>
-#include <asm/access-regs.h>
-#include <asm/ucontext.h>
-#include <linux/uaccess.h>
-#include <asm/lowcore.h>
-#include <asm/fpu.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;
-	_sigregs_ext32 sregs_ext;
-	__u16 svc_insn;		/* Offset of svc_insn is NOT fixed! */
-} sigframe32;
-
-typedef struct 
-{
-	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
-	__u16 svc_insn;
-	compat_siginfo_t info;
-	struct ucontext32 uc;
-} rt_sigframe32;
-
-/* Store registers needed to create the signal frame */
-static void store_sigregs(void)
-{
-	save_access_regs(current->thread.acrs);
-	save_user_fpu_regs();
-}
-
-/* Load registers after signal return */
-static void load_sigregs(void)
-{
-	restore_access_regs(current->thread.acrs);
-}
-
-static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
-{
-	_sigregs32 user_sregs;
-	int i;
-
-	user_sregs.regs.psw.mask = (__u32)(regs->psw.mask >> 32);
-	user_sregs.regs.psw.mask &= PSW32_MASK_USER | PSW32_MASK_RI;
-	user_sregs.regs.psw.mask |= PSW32_USER_BITS;
-	user_sregs.regs.psw.addr = (__u32) regs->psw.addr |
-		(__u32)(regs->psw.mask & PSW_MASK_BA);
-	for (i = 0; i < NUM_GPRS; i++)
-		user_sregs.regs.gprs[i] = (__u32) regs->gprs[i];
-	memcpy(&user_sregs.regs.acrs, current->thread.acrs,
-	       sizeof(user_sregs.regs.acrs));
-	fpregs_store((_s390_fp_regs *) &user_sregs.fpregs, &current->thread.ufpu);
-	if (__copy_to_user(sregs, &user_sregs, sizeof(_sigregs32)))
-		return -EFAULT;
-	return 0;
-}
-
-static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
-{
-	_sigregs32 user_sregs;
-	int i;
-
-	/* Always make any pending restarted system call return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	if (__copy_from_user(&user_sregs, &sregs->regs, sizeof(user_sregs)))
-		return -EFAULT;
-
-	if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI))
-		return -EINVAL;
-
-	/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */
-	regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
-		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 |
-		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_RI) << 32 |
-		(__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_AMODE);
-	/* Check for invalid user address space control. */
-	if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_HOME)
-		regs->psw.mask = PSW_ASC_PRIMARY |
-			(regs->psw.mask & ~PSW_MASK_ASC);
-	regs->psw.addr = (__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_INSN);
-	for (i = 0; i < NUM_GPRS; i++)
-		regs->gprs[i] = (__u64) user_sregs.regs.gprs[i];
-	memcpy(&current->thread.acrs, &user_sregs.regs.acrs,
-	       sizeof(current->thread.acrs));
-	fpregs_load((_s390_fp_regs *)&user_sregs.fpregs, &current->thread.ufpu);
-
-	clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
-	return 0;
-}
-
-static int save_sigregs_ext32(struct pt_regs *regs,
-			      _sigregs_ext32 __user *sregs_ext)
-{
-	__u32 gprs_high[NUM_GPRS];
-	__u64 vxrs[__NUM_VXRS_LOW];
-	int i;
-
-	/* Save high gprs to signal stack */
-	for (i = 0; i < NUM_GPRS; i++)
-		gprs_high[i] = regs->gprs[i] >> 32;
-	if (__copy_to_user(&sregs_ext->gprs_high, &gprs_high,
-			   sizeof(sregs_ext->gprs_high)))
-		return -EFAULT;
-
-	/* Save vector registers to signal stack */
-	if (cpu_has_vx()) {
-		for (i = 0; i < __NUM_VXRS_LOW; i++)
-			vxrs[i] = current->thread.ufpu.vxrs[i].low;
-		if (__copy_to_user(&sregs_ext->vxrs_low, vxrs,
-				   sizeof(sregs_ext->vxrs_low)) ||
-		    __copy_to_user(&sregs_ext->vxrs_high,
-				   current->thread.ufpu.vxrs + __NUM_VXRS_LOW,
-				   sizeof(sregs_ext->vxrs_high)))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-static int restore_sigregs_ext32(struct pt_regs *regs,
-				 _sigregs_ext32 __user *sregs_ext)
-{
-	__u32 gprs_high[NUM_GPRS];
-	__u64 vxrs[__NUM_VXRS_LOW];
-	int i;
-
-	/* Restore high gprs from signal stack */
-	if (__copy_from_user(&gprs_high, &sregs_ext->gprs_high,
-			     sizeof(sregs_ext->gprs_high)))
-		return -EFAULT;
-	for (i = 0; i < NUM_GPRS; i++)
-		*(__u32 *)&regs->gprs[i] = gprs_high[i];
-
-	/* Restore vector registers from signal stack */
-	if (cpu_has_vx()) {
-		if (__copy_from_user(vxrs, &sregs_ext->vxrs_low,
-				     sizeof(sregs_ext->vxrs_low)) ||
-		    __copy_from_user(current->thread.ufpu.vxrs + __NUM_VXRS_LOW,
-				     &sregs_ext->vxrs_high,
-				     sizeof(sregs_ext->vxrs_high)))
-			return -EFAULT;
-		for (i = 0; i < __NUM_VXRS_LOW; i++)
-			current->thread.ufpu.vxrs[i].low = vxrs[i];
-	}
-	return 0;
-}
-
-COMPAT_SYSCALL_DEFINE0(sigreturn)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
-	sigset_t set;
-
-	if (get_compat_sigset(&set, (compat_sigset_t __user *)frame->sc.oldmask))
-		goto badframe;
-	set_current_blocked(&set);
-	save_user_fpu_regs();
-	if (restore_sigregs32(regs, &frame->sregs))
-		goto badframe;
-	if (restore_sigregs_ext32(regs, &frame->sregs_ext))
-		goto badframe;
-	load_sigregs();
-	return regs->gprs[2];
-badframe:
-	force_sig(SIGSEGV);
-	return 0;
-}
-
-COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
-	sigset_t set;
-
-	if (get_compat_sigset(&set, &frame->uc.uc_sigmask))
-		goto badframe;
-	set_current_blocked(&set);
-	if (compat_restore_altstack(&frame->uc.uc_stack))
-		goto badframe;
-	save_user_fpu_regs();
-	if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
-		goto badframe;
-	if (restore_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
-		goto badframe;
-	load_sigregs();
-	return regs->gprs[2];
-badframe:
-	force_sig(SIGSEGV);
-	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 int setup_frame32(struct ksignal *ksig, sigset_t *set,
-			 struct pt_regs *regs)
-{
-	int sig = ksig->sig;
-	sigframe32 __user *frame;
-	unsigned long restorer;
-	size_t frame_size;
-
-	/*
-	 * gprs_high are always present for 31-bit compat tasks.
-	 * The space for vector registers is only allocated if
-	 * the machine supports it
-	 */
-	frame_size = sizeof(*frame) - sizeof(frame->sregs_ext.__reserved);
-	if (!cpu_has_vx())
-		frame_size -= sizeof(frame->sregs_ext.vxrs_low) +
-			      sizeof(frame->sregs_ext.vxrs_high);
-	frame = get_sigframe(&ksig->ka, regs, frame_size);
-	if (frame == (void __user *) -1UL)
-		return -EFAULT;
-
-	/* Set up backchain. */
-	if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
-		return -EFAULT;
-
-	/* Create struct sigcontext32 on the signal stack */
-	if (put_compat_sigset((compat_sigset_t __user *)frame->sc.oldmask,
-			      set, sizeof(compat_sigset_t)))
-		return -EFAULT;
-	if (__put_user(ptr_to_compat(&frame->sregs), &frame->sc.sregs))
-		return -EFAULT;
-
-	/* Store registers needed to create the signal frame */
-	store_sigregs();
-
-	/* Create _sigregs32 on the signal stack */
-	if (save_sigregs32(regs, &frame->sregs))
-		return -EFAULT;
-
-	/* Place signal number on stack to allow backtrace from handler.  */
-	if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo))
-		return -EFAULT;
-
-	/* Create _sigregs_ext32 on the signal stack */
-	if (save_sigregs_ext32(regs, &frame->sregs_ext))
-		return -EFAULT;
-
-	/* Set up to return from userspace.  If provided, use a stub
-	   already in userspace.  */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		restorer = (unsigned long __force)
-			ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
-	} else {
-		restorer = VDSO32_SYMBOL(current, sigreturn);
-        }
-
-	/* Set up registers for signal handler */
-	regs->gprs[14] = restorer;
-	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) ksig->ka.sa.sa_handler;
-
-	regs->gprs[2] = 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] = current->thread.last_break;
-	}
-
-	return 0;
-}
-
-static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
-			    struct pt_regs *regs)
-{
-	rt_sigframe32 __user *frame;
-	unsigned long restorer;
-	size_t frame_size;
-	u32 uc_flags;
-
-	frame_size = sizeof(*frame) -
-		     sizeof(frame->uc.uc_mcontext_ext.__reserved);
-	/*
-	 * gprs_high are always present for 31-bit compat tasks.
-	 * The space for vector registers is only allocated if
-	 * the machine supports it
-	 */
-	uc_flags = UC_GPRS_HIGH;
-	if (cpu_has_vx()) {
-		uc_flags |= UC_VXRS;
-	} else {
-		frame_size -= sizeof(frame->uc.uc_mcontext_ext.vxrs_low) +
-			      sizeof(frame->uc.uc_mcontext_ext.vxrs_high);
-	}
-	frame = get_sigframe(&ksig->ka, regs, frame_size);
-	if (frame == (void __user *) -1UL)
-		return -EFAULT;
-
-	/* Set up backchain. */
-	if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))
-		return -EFAULT;
-
-	/* Set up to return from userspace.  If provided, use a stub
-	   already in userspace.  */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		restorer = (unsigned long __force)
-			ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
-	} else {
-		restorer = VDSO32_SYMBOL(current, rt_sigreturn);
-	}
-
-	/* Create siginfo on the signal stack */
-	if (copy_siginfo_to_user32(&frame->info, &ksig->info))
-		return -EFAULT;
-
-	/* Store registers needed to create the signal frame */
-	store_sigregs();
-
-	/* Create ucontext on the signal stack. */
-	if (__put_user(uc_flags, &frame->uc.uc_flags) ||
-	    __put_user(0, &frame->uc.uc_link) ||
-	    __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]) ||
-	    save_sigregs32(regs, &frame->uc.uc_mcontext) ||
-	    put_compat_sigset(&frame->uc.uc_sigmask, set, sizeof(compat_sigset_t)) ||
-	    save_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
-		return -EFAULT;
-
-	/* Set up registers for signal handler */
-	regs->gprs[14] = restorer;
-	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 __force) ksig->ka.sa.sa_handler;
-
-	regs->gprs[2] = ksig->sig;
-	regs->gprs[3] = (__force __u64) &frame->info;
-	regs->gprs[4] = (__force __u64) &frame->uc;
-	regs->gprs[5] = current->thread.last_break;
-	return 0;
-}
-
-/*
- * OK, we're invoking a handler
- */	
-
-void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
-		     struct pt_regs *regs)
-{
-	int ret;
-
-	/* Set up the stack frame */
-	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame32(ksig, oldset, regs);
-	else
-		ret = setup_frame32(ksig, oldset, regs);
-
-	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP));
-}
-