sh: sys_sh consolidation for arch_get_unmapped_area().

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

5 files changed, 108 insertions, 326 deletions

diff --git a/arch/sh/kernel/Makefile_32 b/arch/sh/kernel/Makefile_32
index 17216f5..34e8fa0 100644
--- a/arch/sh/kernel/Makefile_32
+++ b/arch/sh/kernel/Makefile_32
@@ -5,7 +5,7 @@
 extra-y	:= head_32.o init_task.o vmlinux.lds
 
 obj-y	:= debugtraps.o io.o io_generic.o irq.o machvec.o process_32.o \
-	   ptrace_32.o semaphore.o setup.o signal_32.o sys_sh.o \
+	   ptrace_32.o semaphore.o setup.o signal_32.o sys_sh.o sys_sh32.o \
 	   syscalls_32.o time.o topology.o traps_32.o
 
 obj-y				+= cpu/ timers/
diff --git a/arch/sh/kernel/Makefile_64 b/arch/sh/kernel/Makefile_64
index 1211e86..aeac400 100644
--- a/arch/sh/kernel/Makefile_64
+++ b/arch/sh/kernel/Makefile_64
@@ -1,7 +1,7 @@
 extra-y	:= head_64.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_sh64.o \
+	   ptrace_64.o semaphore.o setup.o signal_64.o sys_sh.o sys_sh64.o \
 	   syscalls_64.o time.o topology.o traps_64.o
 
 obj-y				+= cpu/ timers/
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index d545a68..59cd285 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -7,7 +7,6 @@
  *
  * Taken from i386 version.
  */
-
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
@@ -27,28 +26,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
-/*
- * sys_pipe() is the normal C calling standard for creating
- * a pipe. It's not the way Unix traditionally does this, though.
- */
-asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
-	unsigned long r6, unsigned long r7,
-	struct pt_regs __regs)
-{
-	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
-	int fd[2];
-	int error;
-
-	error = do_pipe(fd);
-	if (!error) {
-		regs->regs[1] = fd[1];
-		return fd[0];
-	}
-	return error;
-}
-
 unsigned long shm_align_mask = PAGE_SIZE - 1;	/* Sane caches */
-
 EXPORT_SYMBOL(shm_align_mask);
 
 #ifdef CONFIG_MMU
@@ -140,7 +118,7 @@ full_search:
 #endif /* CONFIG_MMU */
 
 static inline long
-do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, 
+do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
 	 unsigned long flags, int fd, unsigned long pgoff)
 {
 	int error = -EBADF;
@@ -195,12 +173,13 @@ asmlinkage int sys_ipc(uint call, int first, int second,
 	if (call <= SEMCTL)
 		switch (call) {
 		case SEMOP:
-			return sys_semtimedop(first, (struct sembuf __user *)ptr,
+			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);
+			return sys_semtimedop(first,
+				(struct sembuf __user *)ptr, second,
+			        (const struct timespec __user *)fifth);
 		case SEMGET:
 			return sys_semget (first, second, third);
 		case SEMCTL: {
@@ -215,25 +194,28 @@ asmlinkage int sys_ipc(uint call, int first, int second,
 			return -EINVAL;
 		}
 
-	if (call <= MSGCTL) 
+	if (call <= MSGCTL)
 		switch (call) {
 		case MSGSND:
-			return sys_msgsnd (first, (struct msgbuf __user *) ptr, 
+			return sys_msgsnd (first, (struct msgbuf __user *) ptr,
 					  second, third);
 		case MSGRCV:
 			switch (version) {
-			case 0: {
+			case 0:
+			{
 				struct ipc_kludge tmp;
+
 				if (!ptr)
 					return -EINVAL;
-				
+
 				if (copy_from_user(&tmp,
-						   (struct ipc_kludge __user *) ptr, 
+					(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,
@@ -247,7 +229,7 @@ asmlinkage int sys_ipc(uint call, int first, int second,
 		default:
 			return -EINVAL;
 		}
-	if (call <= SHMCTL) 
+	if (call <= SHMCTL)
 		switch (call) {
 		case SHMAT:
 			switch (version) {
@@ -265,7 +247,7 @@ asmlinkage int sys_ipc(uint call, int first, int second,
 				return do_shmat (first, (char __user *) ptr,
 						  second, (ulong *) third);
 			}
-		case SHMDT: 
+		case SHMDT:
 			return sys_shmdt ((char __user *)ptr);
 		case SHMGET:
 			return sys_shmget (first, second, third);
@@ -275,7 +257,7 @@ asmlinkage int sys_ipc(uint call, int first, int second,
 		default:
 			return -EINVAL;
 		}
-	
+
 	return -EINVAL;
 }
 
@@ -289,49 +271,3 @@ asmlinkage int sys_uname(struct old_utsname * name)
 	up_read(&uts_sem);
 	return err?-EFAULT:0;
 }
-
-asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char * buf,
-			     size_t count, long dummy, loff_t pos)
-{
-	return sys_pread64(fd, buf, count, pos);
-}
-
-asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char * buf,
-			      size_t count, long dummy, loff_t pos)
-{
-	return sys_pwrite64(fd, buf, count, pos);
-}
-
-asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
-				u32 len0, u32 len1, int advice)
-{
-#ifdef  __LITTLE_ENDIAN__
-	return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
-				(u64)len1 << 32 | len0,	advice);
-#else
-	return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
-				(u64)len0 << 32 | len1,	advice);
-#endif
-}
-
-#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A)
-#define SYSCALL_ARG3	"trapa #0x23"
-#else
-#define SYSCALL_ARG3	"trapa #0x13"
-#endif
-
-/*
- * 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 long __sc0 __asm__ ("r3") = __NR_execve;
-	register long __sc4 __asm__ ("r4") = (long) filename;
-	register long __sc5 __asm__ ("r5") = (long) argv;
-	register long __sc6 __asm__ ("r6") = (long) envp;
-	__asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0)	
-			: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
-			: "memory");
-	return __sc0;
-}
diff --git a/arch/sh/kernel/sys_sh32.c b/arch/sh/kernel/sys_sh32.c
new file mode 100644
index 0000000..125e493
--- /dev/null
+++ b/arch/sh/kernel/sys_sh32.c
@@ -0,0 +1,84 @@
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ipc.h>
+#include <asm/cacheflush.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
+	unsigned long r6, unsigned long r7,
+	struct pt_regs __regs)
+{
+	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (!error) {
+		regs->regs[1] = fd[1];
+		return fd[0];
+	}
+	return error;
+}
+
+asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char * buf,
+			     size_t count, long dummy, loff_t pos)
+{
+	return sys_pread64(fd, buf, count, pos);
+}
+
+asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char * buf,
+			      size_t count, long dummy, loff_t pos)
+{
+	return sys_pwrite64(fd, buf, count, pos);
+}
+
+asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
+				u32 len0, u32 len1, int advice)
+{
+#ifdef  __LITTLE_ENDIAN__
+	return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
+				(u64)len1 << 32 | len0,	advice);
+#else
+	return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
+				(u64)len0 << 32 | len1,	advice);
+#endif
+}
+
+#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A)
+#define SYSCALL_ARG3	"trapa #0x23"
+#else
+#define SYSCALL_ARG3	"trapa #0x13"
+#endif
+
+/*
+ * 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 long __sc0 __asm__ ("r3") = __NR_execve;
+	register long __sc4 __asm__ ("r4") = (long) filename;
+	register long __sc5 __asm__ ("r5") = (long) argv;
+	register long __sc6 __asm__ ("r6") = (long) envp;
+	__asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0)
+			: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
+			: "memory");
+	return __sc0;
+}
diff --git a/arch/sh/kernel/sys_sh64.c b/arch/sh/kernel/sys_sh64.c
index de0a303..578004d 100644
--- a/arch/sh/kernel/sys_sh64.c
+++ b/arch/sh/kernel/sys_sh64.c
@@ -1,9 +1,5 @@
 /*
- * 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
+ * arch/sh/kernel/sys_sh64.c
  *
  * Copyright (C) 2000, 2001  Paolo Alberelli
  *
@@ -11,10 +7,10 @@
  * have a non-standard calling sequence on the Linux/SH5
  * platform.
  *
- * Mostly taken from i386 version.
- *
+ * 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.
  */
-
 #include <linux/errno.h>
 #include <linux/rwsem.h>
 #include <linux/sched.h>
@@ -34,48 +30,10 @@
 #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];
@@ -89,202 +47,6 @@ asmlinkage int sys_pipe(unsigned long * fildes)
         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.