sh: Move arch/sh64/kernel/sys_sh64.c to arch/sh/kernel/

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 305 insertions, 1 deletions

diff --git a/arch/sh/kernel/Makefile_64 b/arch/sh/kernel/Makefile_64
index 5f2711ae5468..1f27d5fd99a8 100644
--- a/arch/sh/kernel/Makefile_64
+++ b/arch/sh/kernel/Makefile_64
@@ -1,7 +1,7 @@
 extra-y	:= head.o init_task.o vmlinux.lds
 
 obj-y	:= debugtraps.o io.o io_generic.o irq.o machvec.o process_64.o \
-	   ptrace_64.o semaphore.o setup.o signal_64.o sys_sh.o syscalls.o \
+	   ptrace_64.o semaphore.o setup.o signal_64.o sys_sh64.o syscalls.o \
 	   time.o topology.o traps.o
 
 obj-y				+= cpu/ timers/
diff --git a/arch/sh/kernel/sys_sh64.c b/arch/sh/kernel/sys_sh64.c
new file mode 100644
index 000000000000..de0a303ba26f
--- /dev/null
+++ b/arch/sh/kernel/sys_sh64.c
@@ -0,0 +1,304 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/sh64/kernel/sys_sh64.c
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/SH5
+ * platform.
+ *
+ * Mostly taken from i386 version.
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/syscalls.h>
+#include <linux/ipc.h>
+#include <asm/uaccess.h>
+#include <asm/ptrace.h>
+#include <asm/unistd.h>
+
+#define REG_3	3
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+#ifdef NEW_PIPE_IMPLEMENTATION
+asmlinkage int sys_pipe(unsigned long * fildes,
+			unsigned long   dummy_r3,
+			unsigned long   dummy_r4,
+			unsigned long   dummy_r5,
+			unsigned long   dummy_r6,
+			unsigned long   dummy_r7,
+			struct pt_regs * regs)	   /* r8 = pt_regs  forced by entry.S */
+{
+	int fd[2];
+	int ret;
+
+	ret = do_pipe(fd);
+	if (ret == 0)
+		/*
+		 ***********************************************************************
+		 *   To avoid the copy_to_user we prefer to break the ABIs convention, *
+		 *   packing the valid pair of file IDs into a single register (r3);   *
+		 *   while r2 is the return code as defined by the sh5-ABIs.	       *
+		 *   BE CAREFUL: pipe stub, into glibc, must be aware of this solution *
+		 ***********************************************************************
+
+#ifdef __LITTLE_ENDIAN__
+		regs->regs[REG_3] = (((unsigned long long) fd[1]) << 32) | ((unsigned long long) fd[0]);
+#else
+		regs->regs[REG_3] = (((unsigned long long) fd[0]) << 32) | ((unsigned long long) fd[1]);
+#endif
+
+		*/
+	       /* although not very clever this is endianess independent */
+		regs->regs[REG_3] = (unsigned long long) *((unsigned long long *) fd);
+
+	return ret;
+}
+
+#else
+asmlinkage int sys_pipe(unsigned long * fildes)
+{
+        int fd[2];
+        int error;
+
+        error = do_pipe(fd);
+        if (!error) {
+                if (copy_to_user(fildes, fd, 2*sizeof(int)))
+                        error = -EFAULT;
+        }
+        return error;
+}
+
+#endif
+
+/*
+ * To avoid cache alias, we map the shard page with same color.
+ */
+#define COLOUR_ALIGN(addr)	(((addr)+SHMLBA-1)&~(SHMLBA-1))
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+	unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	struct vm_area_struct *vma;
+
+	if (flags & MAP_FIXED) {
+		/* We do not accept a shared mapping if it would violate
+		 * cache aliasing constraints.
+		 */
+		if ((flags & MAP_SHARED) && (addr & (SHMLBA - 1)))
+			return -EINVAL;
+		return addr;
+	}
+
+	if (len > TASK_SIZE)
+		return -ENOMEM;
+	if (!addr)
+		addr = TASK_UNMAPPED_BASE;
+
+	if (flags & MAP_PRIVATE)
+		addr = PAGE_ALIGN(addr);
+	else
+		addr = COLOUR_ALIGN(addr);
+
+	for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+		/* At this point:  (!vma || addr < vma->vm_end). */
+		if (TASK_SIZE - len < addr)
+			return -ENOMEM;
+		if (!vma || addr + len <= vma->vm_start)
+			return addr;
+		addr = vma->vm_end;
+		if (!(flags & MAP_PRIVATE))
+			addr = COLOUR_ALIGN(addr);
+	}
+}
+
+/* common code for old and new mmaps */
+static inline long do_mmap2(
+	unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	int error = -EBADF;
+	struct file * file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			goto out;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+
+	if (file)
+		fput(file);
+out:
+	return error;
+}
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	return do_mmap2(addr, len, prot, flags, fd, pgoff);
+}
+
+asmlinkage int old_mmap(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	int fd, unsigned long off)
+{
+	if (off & ~PAGE_MASK)
+		return -EINVAL;
+	return do_mmap2(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc(uint call, int first, int second,
+		       int third, void __user *ptr, long fifth)
+{
+	int version, ret;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	if (call <= SEMCTL)
+		switch (call) {
+		case SEMOP:
+			return sys_semtimedop(first, (struct sembuf __user *)ptr,
+					      second, NULL);
+		case SEMTIMEDOP:
+			return sys_semtimedop(first, (struct sembuf __user *)ptr,
+					      second,
+					      (const struct timespec __user *)fifth);
+		case SEMGET:
+			return sys_semget (first, second, third);
+		case SEMCTL: {
+			union semun fourth;
+			if (!ptr)
+				return -EINVAL;
+			if (get_user(fourth.__pad, (void * __user *) ptr))
+				return -EFAULT;
+			return sys_semctl (first, second, third, fourth);
+			}
+		default:
+			return -EINVAL;
+		}
+
+	if (call <= MSGCTL)
+		switch (call) {
+		case MSGSND:
+			return sys_msgsnd (first, (struct msgbuf __user *) ptr,
+					  second, third);
+		case MSGRCV:
+			switch (version) {
+			case 0: {
+				struct ipc_kludge tmp;
+				if (!ptr)
+					return -EINVAL;
+
+				if (copy_from_user(&tmp,
+						   (struct ipc_kludge __user *) ptr,
+						   sizeof (tmp)))
+					return -EFAULT;
+				return sys_msgrcv (first, tmp.msgp, second,
+						   tmp.msgtyp, third);
+				}
+			default:
+				return sys_msgrcv (first,
+						   (struct msgbuf __user *) ptr,
+						   second, fifth, third);
+			}
+		case MSGGET:
+			return sys_msgget ((key_t) first, second);
+		case MSGCTL:
+			return sys_msgctl (first, second,
+					   (struct msqid_ds __user *) ptr);
+		default:
+			return -EINVAL;
+		}
+	if (call <= SHMCTL)
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			default: {
+				ulong raddr;
+				ret = do_shmat (first, (char __user *) ptr,
+						 second, &raddr);
+				if (ret)
+					return ret;
+				return put_user (raddr, (ulong __user *) third);
+			}
+			case 1:	/* iBCS2 emulator entry point */
+				if (!segment_eq(get_fs(), get_ds()))
+					return -EINVAL;
+				return do_shmat (first, (char __user *) ptr,
+						  second, (ulong *) third);
+			}
+		case SHMDT:
+			return sys_shmdt ((char __user *)ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second,
+					   (struct shmid_ds __user *) ptr);
+		default:
+			return -EINVAL;
+		}
+
+	return -EINVAL;
+}
+
+asmlinkage int sys_uname(struct old_utsname * name)
+{
+	int err;
+	if (!name)
+		return -EFAULT;
+	down_read(&uts_sem);
+	err = copy_to_user(name, utsname(), sizeof (*name));
+	up_read(&uts_sem);
+	return err?-EFAULT:0;
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+	register unsigned long __sc0 __asm__ ("r9") = ((0x13 << 16) | __NR_execve);
+	register unsigned long __sc2 __asm__ ("r2") = (unsigned long) filename;
+	register unsigned long __sc3 __asm__ ("r3") = (unsigned long) argv;
+	register unsigned long __sc4 __asm__ ("r4") = (unsigned long) envp;
+	__asm__ __volatile__ ("trapa	%1 !\t\t\t execve(%2,%3,%4)"
+	: "=r" (__sc0)
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) );
+	__asm__ __volatile__ ("!dummy	%0 %1 %2 %3"
+	: : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) : "memory");
+	return __sc0;
+}