arch/h8300/kernel/sys_h8300.c - arm/linux-arm64-legacy - Git at Google

 /*
  * linux/arch/h8300/kernel/sys_h8300.c
  *
  * This file contains various random system calls that
  * have a non-standard calling sequence on the H8/300
  * platform.
  */

 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
 #include <linux/smp_lock.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 <asm/setup.h>
 #include <asm/uaccess.h>
 #include <asm/cachectl.h>
 #include <asm/traps.h>
 #include <asm/ipc.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 * 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;
 }

 /* 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);
 }

 /*
  * Perform the select(nd, in, out, ex, tv) and mmap() system
  * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
  * handle more than 4 system call parameters, so these system calls
  * used a memory block for parameter passing..
  */

 struct mmap_arg_struct {
 	unsigned long addr;
 	unsigned long len;
 	unsigned long prot;
 	unsigned long flags;
 	unsigned long fd;
 	unsigned long offset;
 };

 asmlinkage int old_mmap(struct mmap_arg_struct *arg)
 {
 	struct mmap_arg_struct a;
 	int error = -EFAULT;

 	if (copy_from_user(&a, arg, sizeof(a)))
 		goto out;

 	error = -EINVAL;
 	if (a.offset & ~PAGE_MASK)
 		goto out;

 	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

 	error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
 out:
 	return error;
 }

 #if 0 /* DAVIDM - do we want this */
 struct mmap_arg_struct64 {
 	__u32 addr;
 	__u32 len;
 	__u32 prot;
 	__u32 flags;
 	__u64 offset; /* 64 bits */
 	__u32 fd;
 };

 asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
 {
 	int error = -EFAULT;
 	struct file * file = NULL;
 	struct mmap_arg_struct64 a;
 	unsigned long pgoff;

 	if (copy_from_user(&a, arg, sizeof(a)))
 		return -EFAULT;

 	if ((long)a.offset & ~PAGE_MASK)
 		return -EINVAL;

 	pgoff = a.offset >> PAGE_SHIFT;
 	if ((a.offset >> PAGE_SHIFT) != pgoff)
 		return -EINVAL;

 	if (!(a.flags & MAP_ANONYMOUS)) {
 		error = -EBADF;
 		file = fget(a.fd);
 		if (!file)
 			goto out;
 	}
 	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

 	down_write(&current->mm->mmap_sem);
 	error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
 	up_write(&current->mm->mmap_sem);
 	if (file)
 		fput(file);
 out:
 	return error;
 }
 #endif

 struct sel_arg_struct {
 	unsigned long n;
 	fd_set *inp, *outp, *exp;
 	struct timeval *tvp;
 };

 asmlinkage int old_select(struct sel_arg_struct *arg)
 {
 	struct sel_arg_struct a;

 	if (copy_from_user(&a, arg, sizeof(a)))
 		return -EFAULT;
 	/* sys_select() does the appropriate kernel locking */
 	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
 }

 /*
  * 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 *ptr, long fifth)
 {
 	int version, ret;

 	version = call >> 16; /* hack for backward compatibility */
 	call &= 0xffff;

 	if (call <= SEMCTL)
 		switch (call) {
 		case SEMOP:
 			return sys_semop (first, (struct sembuf *)ptr, second);
 		case SEMGET:
 			return sys_semget (first, second, third);
 		case SEMCTL: {
 			union semun fourth;
 			if (!ptr)
 				return -EINVAL;
 			if (get_user(fourth.__pad, (void **) 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 *) 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 *)ptr,
 						    sizeof (tmp)))
 					return -EFAULT;
 				return sys_msgrcv (first, tmp.msgp, second,
 						   tmp.msgtyp, third);
 				}
 			default:
 				return sys_msgrcv (first,
 						   (struct msgbuf *) ptr,
 						   second, fifth, third);
 			}
 		case MSGGET:
 			return sys_msgget ((key_t) first, second);
 		case MSGCTL:
 			return sys_msgctl (first, second,
 					   (struct msqid_ds *) ptr);
 		default:
 			return -EINVAL;
 		}
 	if (call <= SHMCTL)
 		switch (call) {
 		case SHMAT:
 			switch (version) {
 			default: {
 				ulong raddr;
 				ret = do_shmat (first, (char *) ptr,
 						 second, &raddr);
 				if (ret)
 					return ret;
 				return put_user (raddr, (ulong *) third);
 			}
 			}
 		case SHMDT:
 			return sys_shmdt ((char *)ptr);
 		case SHMGET:
 			return sys_shmget (first, second, third);
 		case SHMCTL:
 			return sys_shmctl (first, second,
 					   (struct shmid_ds *) ptr);
 		default:
 			return -EINVAL;
 		}

 	return -EINVAL;
 }

 /* sys_cacheflush -- no support.  */
 asmlinkage int
 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 {
 	return -EINVAL;
 }

 asmlinkage int sys_getpagesize(void)
 {
 	return PAGE_SIZE;
 }

 #if defined(CONFIG_SYSCALL_PRINT)
 asmlinkage void syscall_print(void *dummy,...)
 {
 	struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
 	printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
                ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
 }
 #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 res __asm__("er0");
 	register const char * _a __asm__("er1") = filename;
 	register void *_b __asm__("er2") = argv;
 	register void *_c __asm__("er3") = envp;
 	__asm__ __volatile__ ("mov.l %1,er0\n\t"
 			"trapa	#0\n\t"
 			: "=r" (res)
 			: "g" (__NR_execve),
 			  "g" (_a),
 			  "g" (_b),
 			  "g" (_c)
 			: "cc", "memory");
 	return res;
 }
	/*
	* linux/arch/h8300/kernel/sys_h8300.c
	*
	* This file contains various random system calls that
	* have a non-standard calling sequence on the H8/300
	* platform.
	*/

	#include <linux/errno.h>
	#include <linux/sched.h>
	#include <linux/mm.h>
	#include <linux/smp.h>
	#include <linux/smp_lock.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 <asm/setup.h>
	#include <asm/uaccess.h>
	#include <asm/cachectl.h>
	#include <asm/traps.h>
	#include <asm/ipc.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 * 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;
	}

	/* 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);
	}

	/*
	* Perform the select(nd, in, out, ex, tv) and mmap() system
	* calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
	* handle more than 4 system call parameters, so these system calls
	* used a memory block for parameter passing..
	*/

	struct mmap_arg_struct {
	unsigned long addr;
	unsigned long len;
	unsigned long prot;
	unsigned long flags;
	unsigned long fd;
	unsigned long offset;
	};

	asmlinkage int old_mmap(struct mmap_arg_struct *arg)
	{
	struct mmap_arg_struct a;
	int error = -EFAULT;

	if (copy_from_user(&a, arg, sizeof(a)))
	goto out;

	error = -EINVAL;
	if (a.offset & ~PAGE_MASK)
	goto out;

	a.flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);

	error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
	out:
	return error;
	}

	#if 0 /* DAVIDM - do we want this */
	struct mmap_arg_struct64 {
	__u32 addr;
	__u32 len;
	__u32 prot;
	__u32 flags;
	__u64 offset; /* 64 bits */
	__u32 fd;
	};

	asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
	{
	int error = -EFAULT;
	struct file * file = NULL;
	struct mmap_arg_struct64 a;
	unsigned long pgoff;

	if (copy_from_user(&a, arg, sizeof(a)))
	return -EFAULT;

	if ((long)a.offset & ~PAGE_MASK)
	return -EINVAL;

	pgoff = a.offset >> PAGE_SHIFT;
	if ((a.offset >> PAGE_SHIFT) != pgoff)
	return -EINVAL;

	if (!(a.flags & MAP_ANONYMOUS)) {
	error = -EBADF;
	file = fget(a.fd);
	if (!file)
	goto out;
	}
	a.flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);

	down_write(&current->mm->mmap_sem);
	error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
	up_write(&current->mm->mmap_sem);
	if (file)
	fput(file);
	out:
	return error;
	}
	#endif

	struct sel_arg_struct {
	unsigned long n;
	fd_set inp, outp, *exp;
	struct timeval *tvp;
	};

	asmlinkage int old_select(struct sel_arg_struct *arg)
	{
	struct sel_arg_struct a;

	if (copy_from_user(&a, arg, sizeof(a)))
	return -EFAULT;
	/* sys_select() does the appropriate kernel locking */
	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
	}

	/*
	* 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 *ptr, long fifth)
	{
	int version, ret;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	if (call <= SEMCTL)
	switch (call) {
	case SEMOP:
	return sys_semop (first, (struct sembuf *)ptr, second);
	case SEMGET:
	return sys_semget (first, second, third);
	case SEMCTL: {
	union semun fourth;
	if (!ptr)
	return -EINVAL;
	if (get_user(fourth.__pad, (void **) 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 *) 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 *)ptr,
	sizeof (tmp)))
	return -EFAULT;
	return sys_msgrcv (first, tmp.msgp, second,
	tmp.msgtyp, third);
	}
	default:
	return sys_msgrcv (first,
	(struct msgbuf *) ptr,
	second, fifth, third);
	}
	case MSGGET:
	return sys_msgget ((key_t) first, second);
	case MSGCTL:
	return sys_msgctl (first, second,
	(struct msqid_ds *) ptr);
	default:
	return -EINVAL;
	}
	if (call <= SHMCTL)
	switch (call) {
	case SHMAT:
	switch (version) {
	default: {
	ulong raddr;
	ret = do_shmat (first, (char *) ptr,
	second, &raddr);
	if (ret)
	return ret;
	return put_user (raddr, (ulong *) third);
	}
	}
	case SHMDT:
	return sys_shmdt ((char *)ptr);
	case SHMGET:
	return sys_shmget (first, second, third);
	case SHMCTL:
	return sys_shmctl (first, second,
	(struct shmid_ds *) ptr);
	default:
	return -EINVAL;
	}

	return -EINVAL;
	}

	/* sys_cacheflush -- no support. */
	asmlinkage int
	sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
	{
	return -EINVAL;
	}

	asmlinkage int sys_getpagesize(void)
	{
	return PAGE_SIZE;
	}

	#if defined(CONFIG_SYSCALL_PRINT)
	asmlinkage void syscall_print(void *dummy,...)
	{
	struct pt_regs regs = (struct pt_regs ) ((unsigned char *)&dummy-4);
	printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
	((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
	}
	#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 res __asm__("er0");
	register const char * _a __asm__("er1") = filename;
	register void *_b __asm__("er2") = argv;
	register void *_c __asm__("er3") = envp;
	__asm__ __volatile__ ("mov.l %1,er0\n\t"
	"trapa #0\n\t"
	: "=r" (res)
	: "g" (__NR_execve),
	"g" (_a),
	"g" (_b),
	"g" (_c)
	: "cc", "memory");
	return res;
	}