1 files changed, 0 insertions, 322 deletions
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
deleted file mode 100644
index 862460c3b183..000000000000
--- a/arch/c6x/kernel/signal.c
+++ /dev/null
@@ -1,322 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  Port on Texas Instruments TMS320C6x architecture
- *
- *  Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
- *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
- *
- *  Updated for 2.6.34: Mark Salter <msalter@redhat.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/uaccess.h>
-#include <linux/syscalls.h>
-#include <linux/tracehook.h>
-
-#include <asm/asm-offsets.h>
-#include <asm/ucontext.h>
-#include <asm/cacheflush.h>
-
-
-/*
- * Do a signal return, undo the signal stack.
- */
-
-#define RETCODE_SIZE (9 << 2)	/* 9 instructions = 36 bytes */
-
-struct rt_sigframe {
-	struct siginfo __user *pinfo;
-	void __user *puc;
-	struct siginfo info;
-	struct ucontext uc;
-	unsigned long retcode[RETCODE_SIZE >> 2];
-};
-
-static int restore_sigcontext(struct pt_regs *regs,
-			      struct sigcontext __user *sc)
-{
-	int err = 0;
-
-	/* The access_ok check was done by caller, so use __get_user here */
-#define COPY(x)  (err |= __get_user(regs->x, &sc->sc_##x))
-
-	COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
-	COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
-
-	COPY(a16); COPY(a17); COPY(a18); COPY(a19);
-	COPY(a20); COPY(a21); COPY(a22); COPY(a23);
-	COPY(a24); COPY(a25); COPY(a26); COPY(a27);
-	COPY(a28); COPY(a29); COPY(a30); COPY(a31);
-	COPY(b16); COPY(b17); COPY(b18); COPY(b19);
-	COPY(b20); COPY(b21); COPY(b22); COPY(b23);
-	COPY(b24); COPY(b25); COPY(b26); COPY(b27);
-	COPY(b28); COPY(b29); COPY(b30); COPY(b31);
-
-	COPY(csr); COPY(pc);
-
-#undef COPY
-
-	return err;
-}
-
-asmlinkage int do_rt_sigreturn(struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	sigset_t set;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	/*
-	 * Since we stacked the signal on a dword boundary,
-	 * 'sp' should be dword aligned here.  If it's
-	 * not, then the user is trying to mess with us.
-	 */
-	if (regs->sp & 7)
-		goto badframe;
-
-	frame = (struct rt_sigframe __user *) ((unsigned long) regs->sp + 8);
-
-	if (!access_ok(frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
-		goto badframe;
-
-	return regs->a4;
-
-badframe:
-	force_sig(SIGSEGV);
-	return 0;
-}
-
-static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
-			    unsigned long mask)
-{
-	int err = 0;
-
-	err |= __put_user(mask, &sc->sc_mask);
-
-	/* The access_ok check was done by caller, so use __put_user here */
-#define COPY(x) (err |= __put_user(regs->x, &sc->sc_##x))
-
-	COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
-	COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
-
-	COPY(a16); COPY(a17); COPY(a18); COPY(a19);
-	COPY(a20); COPY(a21); COPY(a22); COPY(a23);
-	COPY(a24); COPY(a25); COPY(a26); COPY(a27);
-	COPY(a28); COPY(a29); COPY(a30); COPY(a31);
-	COPY(b16); COPY(b17); COPY(b18); COPY(b19);
-	COPY(b20); COPY(b21); COPY(b22); COPY(b23);
-	COPY(b24); COPY(b25); COPY(b26); COPY(b27);
-	COPY(b28); COPY(b29); COPY(b30); COPY(b31);
-
-	COPY(csr); COPY(pc);
-
-#undef COPY
-
-	return err;
-}
-
-static inline void __user *get_sigframe(struct ksignal *ksig,
-					struct pt_regs *regs,
-					unsigned long framesize)
-{
-	unsigned long sp = sigsp(regs->sp, ksig);
-
-	/*
-	 * No matter what happens, 'sp' must be dword
-	 * aligned. Otherwise, nasty things will happen
-	 */
-	return (void __user *)((sp - framesize) & ~7);
-}
-
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
-			  struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	unsigned long __user *retcode;
-	int err = 0;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(frame, sizeof(*frame)))
-		return -EFAULT;
-
-	err |= __put_user(&frame->info, &frame->pinfo);
-	err |= __put_user(&frame->uc, &frame->puc);
-	err |= copy_siginfo_to_user(&frame->info, &ksig->info);
-
-	/* Clear all the bits of the ucontext we don't use.  */
-	err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
-
-	err |= setup_sigcontext(&frame->uc.uc_mcontext,	regs, set->sig[0]);
-	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-
-	/* Set up to return from userspace */
-	retcode = (unsigned long __user *) &frame->retcode;
-
-	/* The access_ok check was done above, so use __put_user here */
-#define COPY(x) (err |= __put_user(x, retcode++))
-
-	COPY(0x0000002AUL | (__NR_rt_sigreturn << 7));
-				/* MVK __NR_rt_sigreturn,B0 */
-	COPY(0x10000000UL);	/* SWE */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-	COPY(0x00006000UL);	/* NOP 4 */
-
-#undef COPY
-
-	if (err)
-		return -EFAULT;
-
-	flush_icache_range((unsigned long) &frame->retcode,
-			   (unsigned long) &frame->retcode + RETCODE_SIZE);
-
-	retcode = (unsigned long __user *) &frame->retcode;
-
-	/* Change user context to branch to signal handler */
-	regs->sp = (unsigned long) frame - 8;
-	regs->b3 = (unsigned long) retcode;
-	regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
-
-	/* Give the signal number to the handler */
-	regs->a4 = ksig->sig;
-
-	/*
-	 * For realtime signals we must also set the second and third
-	 * arguments for the signal handler.
-	 *   -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
-	 */
-	regs->b4 = (unsigned long)&frame->info;
-	regs->a6 = (unsigned long)&frame->uc;
-
-	return 0;
-}
-
-static inline void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
-{
-	switch (regs->a4) {
-	case -ERESTARTNOHAND:
-		if (!has_handler)
-			goto do_restart;
-		regs->a4 = -EINTR;
-		break;
-
-	case -ERESTARTSYS:
-		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
-			regs->a4 = -EINTR;
-			break;
-		}
-		fallthrough;
-	case -ERESTARTNOINTR:
-do_restart:
-		regs->a4 = regs->orig_a4;
-		regs->pc -= 4;
-		break;
-	}
-}
-
-/*
- * handle the actual delivery of a signal to userspace
- */
-static void handle_signal(struct ksignal *ksig, struct pt_regs *regs,
-			  int syscall)
-{
-	int ret;
-
-	/* Are we from a system call? */
-	if (syscall) {
-		/* If so, check system call restarting.. */
-		switch (regs->a4) {
-		case -ERESTART_RESTARTBLOCK:
-		case -ERESTARTNOHAND:
-			regs->a4 = -EINTR;
-			break;
-
-		case -ERESTARTSYS:
-			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
-				regs->a4 = -EINTR;
-				break;
-			}
-
-			fallthrough;
-		case -ERESTARTNOINTR:
-			regs->a4 = regs->orig_a4;
-			regs->pc -= 4;
-		}
-	}
-
-	/* Set up the stack frame */
-	ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
-	signal_setup_done(ret, ksig, 0);
-}
-
-/*
- * handle a potential signal
- */
-static void do_signal(struct pt_regs *regs, int syscall)
-{
-	struct ksignal ksig;
-
-	/* we want the common case to go fast, which is why we may in certain
-	 * cases get here from kernel mode */
-	if (!user_mode(regs))
-		return;
-
-	if (get_signal(&ksig)) {
-		handle_signal(&ksig, regs, syscall);
-		return;
-	}
-
-	/* did we come from a system call? */
-	if (syscall) {
-		/* restart the system call - no handlers present */
-		switch (regs->a4) {
-		case -ERESTARTNOHAND:
-		case -ERESTARTSYS:
-		case -ERESTARTNOINTR:
-			regs->a4 = regs->orig_a4;
-			regs->pc -= 4;
-			break;
-
-		case -ERESTART_RESTARTBLOCK:
-			regs->a4 = regs->orig_a4;
-			regs->b0 = __NR_restart_syscall;
-			regs->pc -= 4;
-			break;
-		}
-	}
-
-	/* if there's no signal to deliver, we just put the saved sigmask
-	 * back */
-	restore_saved_sigmask();
-}
-
-/*
- * notification of userspace execution resumption
- * - triggered by current->work.notify_resume
- */
-asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags,
-				 int syscall)
-{
-	/* deal with pending signal delivery */
-	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
-		do_signal(regs, syscall);
-
-	if (thread_info_flags & (1 << TIF_NOTIFY_RESUME))
-		tracehook_notify_resume(regs);
-}