patch-2.4.19 linux-2.4.19/arch/ppc64/kernel/syscalls.c

• Lines: 317
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ppc64/kernel/syscalls.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ppc64/kernel/syscalls.c linux-2.4.19/arch/ppc64/kernel/syscalls.c
@@ -0,0 +1,316 @@
+/*
+ * linux/arch/ppc/kernel/sys_ppc.c
+ *
+ *  PowerPC version 
+ *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * Derived from "arch/i386/kernel/sys_i386.c"
+ * Adapted from the i386 version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras (paulus@cs.anu.edu.au).
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/PPC
+ * platform.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+#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/mman.h>
+#include <linux/sys.h>
+#include <linux/ipc.h>
+#include <linux/utsname.h>
+#include <linux/file.h>
+#include <linux/init.h>
+#include <linux/personality.h>
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+#include <asm/semaphore.h>
+#include <asm/ppcdebug.h>
+
+#include <asm/time.h>
+
+extern unsigned long wall_jiffies;
+#define USEC_PER_SEC (1000000)
+
+void
+check_bugs(void)
+{
+}
+
+asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
+{
+	printk(KERN_ERR "sys_ioperm()\n");
+	return -EIO;
+}
+
+int sys_iopl(int a1, int a2, int a3, int a4)
+{
+	printk(KERN_ERR "sys_iopl(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
+	return (-ENOSYS);
+}
+
+int sys_vm86(int a1, int a2, int a3, int a4)
+{
+	printk(KERN_ERR "sys_vm86(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
+	return (-ENOSYS);
+}
+
+int sys_modify_ldt(int a1, int a2, int a3, int a4)
+{
+	printk(KERN_ERR "sys_modify_ldt(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
+	return (-ENOSYS);
+}
+
+/*
+ * 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, long third, void *ptr, long fifth)
+{
+	int version, ret;
+
+	PPCDBG(PPCDBG_SYS64X, "sys_ipc - entered - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	ret = -EINVAL;
+	switch (call) {
+	case SEMOP:
+		ret = sys_semop (first, (struct sembuf *)ptr, second);
+		break;
+	case SEMGET:
+		ret = sys_semget (first, second, third);
+		break;
+	case SEMCTL: {
+		union semun fourth;
+
+		if (!ptr)
+			break;
+		if ((ret = verify_area (VERIFY_READ, ptr, sizeof(long)))
+		    || (ret = get_user(fourth.__pad, (void **)ptr)))
+			break;
+		ret = sys_semctl (first, second, third, fourth);
+		break;
+	}
+	case MSGSND:
+		ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third);
+		break;
+	case MSGRCV:
+		switch (version) {
+		case 0: {
+			struct ipc_kludge tmp;
+
+			if (!ptr)
+				break;
+			if ((ret = verify_area (VERIFY_READ, ptr, sizeof(tmp)))
+			    || (ret = copy_from_user(&tmp,
+						(struct ipc_kludge *) ptr,
+						sizeof (tmp))))
+				break;
+			ret = sys_msgrcv (first, (struct msgbuf *)(unsigned long)tmp.msgp,
+						second, tmp.msgtyp, third);
+			break;
+		}
+		default:
+			ret = sys_msgrcv (first, (struct msgbuf *) ptr,
+					  second, fifth, third);
+			break;
+		}
+		break;
+	case MSGGET:
+		ret = sys_msgget ((key_t) first, second);
+		break;
+	case MSGCTL:
+		ret = sys_msgctl (first, second, (struct msqid_ds *) ptr);
+		break;
+	case SHMAT:
+		switch (version) {
+		default: {
+			ulong raddr;
+
+			if ((ret = verify_area(VERIFY_WRITE, (ulong*) third,
+					       sizeof(ulong))))
+				break;
+			ret = sys_shmat (first, (char *) ptr, second, &raddr);
+			if (ret)
+				break;
+			ret = put_user (raddr, (ulong *) third);
+			break;
+		}
+		case 1:	/* iBCS2 emulator entry point */
+			if (!segment_eq(get_fs(), get_ds()))
+				break;
+			ret = sys_shmat (first, (char *) ptr, second,
+					 (ulong *) third);
+			break;
+		}
+		break;
+	case SHMDT: 
+		ret = sys_shmdt ((char *)ptr);
+		break;
+	case SHMGET:
+		ret = sys_shmget (first, second, third);
+		break;
+	case SHMCTL:
+		ret = sys_shmctl (first, second, (struct shmid_ds *) ptr);
+		break;
+	}
+
+	PPCDBG(PPCDBG_SYS64X, "sys_ipc - exited - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	return ret;
+}
+
+/*
+ * 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(int *fildes)
+{
+	int fd[2];
+	int error;
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_pipe - entered - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+
+	error = do_pipe(fd);
+	if (!error) {
+		if (copy_to_user(fildes, fd, 2*sizeof(int)))
+			error = -EFAULT;
+	}
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_pipe - exited - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	return error;
+}
+
+asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
+				  unsigned long prot, unsigned long flags,
+				  unsigned long fd, off_t offset)
+{
+	struct file * file = NULL;
+	unsigned long ret = -EBADF;
+
+	PPCDBG(PPCDBG_SYS64X, "sys_mmap - entered - addr=%lx, len=%lx - pid=%ld, comm=%s \n", addr, len, current->pid, current->comm);
+	
+	if (!(flags & MAP_ANONYMOUS)) {
+		if (!(file = fget(fd)))
+			goto out;
+	}
+	
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	down_write(&current->mm->mmap_sem);
+	ret = do_mmap(file, addr, len, prot, flags, offset);
+	up_write(&current->mm->mmap_sem);
+	if (file)
+		fput(file);
+
+out:
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_mmap - exited - ret=%x \n", ret);
+	
+	return ret;
+}
+
+asmlinkage int sys_pause(void)
+{
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_pause - entered - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_pause - exited - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	return -ERESTARTNOHAND;
+}
+
+static int __init set_fakeppc(char *str)
+{
+	if (*str)
+		return 0;
+	init_task.personality = PER_LINUX32;
+	return 1;
+}
+__setup("fakeppc", set_fakeppc);
+
+asmlinkage int sys_uname(struct old_utsname * name)
+{
+	int err = -EFAULT;
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_uname - entered - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+
+	down_read(&uts_sem);
+	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
+		err = 0;
+	up_read(&uts_sem);
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_uname - exited - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	return err;
+}
+
+asmlinkage int sys_olduname(struct oldold_utsname * name)
+{
+	int error;
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_olduname - entered - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+
+	if (!name)
+		return -EFAULT;
+	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+		return -EFAULT;
+  
+	down_read(&uts_sem);
+	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
+	error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
+	error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+	error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
+	error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+	error -= __put_user(0,name->release+__OLD_UTS_LEN);
+	error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+	error -= __put_user(0,name->version+__OLD_UTS_LEN);
+	error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
+	error = __put_user(0,name->machine+__OLD_UTS_LEN);
+	up_read(&uts_sem);
+
+	error = error ? -EFAULT : 0;
+	
+	PPCDBG(PPCDBG_SYS64X, "sys_olduname - exited - pid=%ld current=%lx comm=%s \n", current->pid, current, current->comm);
+	return error;
+}
+
+asmlinkage time_t sys64_time(time_t* tloc)
+{
+	time_t secs;
+	time_t usecs;
+
+	long tb_delta = tb_ticks_since(tb_last_stamp);
+	tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy;
+
+	secs  = xtime.tv_sec;  
+	usecs = xtime.tv_usec + tb_delta / tb_ticks_per_usec;
+	while (usecs >= USEC_PER_SEC) {
+		++secs;
+		usecs -= USEC_PER_SEC;
+	}
+
+	if (tloc) {
+		if (put_user(secs,tloc))
+			secs = -EFAULT;
+	}
+
+	return secs;
+}