powerpc: Merge syscalls.c and sys_ppc32.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 351 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c
new file mode 100644
index 000000000000..3e3a4f67de96
--- /dev/null
+++ b/arch/powerpc/kernel/syscalls.c
@@ -0,0 +1,351 @@
+/*
+ *  Implementation of various system calls for Linux/PowerPC
+ *
+ *    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/syscalls.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/time.h>
+#include <asm/unistd.h>
+
+extern unsigned long wall_jiffies;
+
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+int sys_ipc(uint call, int first, unsigned long second, long third,
+            void __user *ptr, long fifth)
+{
+        int version, ret;
+
+        version = call >> 16; /* hack for backward compatibility */
+        call &= 0xffff;
+
+        ret = -ENOSYS;
+        switch (call) {
+        case SEMOP:
+                ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
+                                      (unsigned)second, NULL);
+                break;
+        case SEMTIMEDOP:
+                ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
+                                      (unsigned)second,
+                                      (const struct timespec __user *) fifth);
+                break;
+        case SEMGET:
+                ret = sys_semget (first, (int)second, third);
+                break;
+        case SEMCTL: {
+                union semun fourth;
+
+                ret = -EINVAL;
+                if (!ptr)
+                        break;
+                if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))
+                        break;
+                ret = sys_semctl(first, (int)second, third, fourth);
+                break;
+        }
+        case MSGSND:
+                ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
+                                 (size_t)second, third);
+                break;
+        case MSGRCV:
+                switch (version) {
+                case 0: {
+                        struct ipc_kludge tmp;
+
+                        ret = -EINVAL;
+                        if (!ptr)
+                                break;
+                        if ((ret = copy_from_user(&tmp,
+                                                (struct ipc_kludge __user *) ptr,
+                                                sizeof (tmp)) ? -EFAULT : 0))
+                                break;
+                        ret = sys_msgrcv(first, tmp.msgp, (size_t) second,
+                                          tmp.msgtyp, third);
+                        break;
+                }
+                default:
+                        ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
+                                          (size_t)second, fifth, third);
+                        break;
+                }
+                break;
+        case MSGGET:
+                ret = sys_msgget((key_t)first, (int)second);
+                break;
+        case MSGCTL:
+                ret = sys_msgctl(first, (int)second,
+                                  (struct msqid_ds __user *)ptr);
+                break;
+        case SHMAT: {
+                ulong raddr;
+                ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
+                if (ret)
+                        break;
+                ret = put_user(raddr, (ulong __user *) third);
+                break;
+        }
+        case SHMDT:
+                ret = sys_shmdt((char __user *)ptr);
+                break;
+        case SHMGET:
+                ret = sys_shmget(first, (size_t)second, third);
+                break;
+        case SHMCTL:
+                ret = sys_shmctl(first, (int)second,
+                                 (struct shmid_ds __user *)ptr);
+                break;
+        }
+
+        return ret;
+}
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+int sys_pipe(int __user *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;
+}
+
+static inline unsigned long do_mmap2(unsigned long addr, size_t len,
+                        unsigned long prot, unsigned long flags,
+                        unsigned long fd, unsigned long off, int shift)
+{
+        struct file * file = NULL;
+        int ret = -EINVAL;
+
+        if (shift) {
+                if (off & ((1 << shift) - 1))
+                        goto out;
+                off >>= shift;
+        }
+                
+        ret = -EBADF;
+        if (!(flags & MAP_ANONYMOUS)) {
+                if (!(file = fget(fd)))
+                        goto out;
+        }
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+        down_write(&current->mm->mmap_sem);
+        ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
+        up_write(&current->mm->mmap_sem);
+        if (file)
+                fput(file);
+out:
+        return ret;
+}
+
+unsigned long sys_mmap2(unsigned long addr, size_t len,
+                        unsigned long prot, unsigned long flags,
+                        unsigned long fd, unsigned long pgoff)
+{
+        return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
+}
+
+unsigned long sys_mmap(unsigned long addr, size_t len,
+                       unsigned long prot, unsigned long flags,
+                       unsigned long fd, off_t offset)
+{
+        return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
+}
+
+#ifdef CONFIG_PPC32
+/*
+ * Due to some executables calling the wrong select we sometimes
+ * get wrong args.  This determines how the args are being passed
+ * (a single ptr to them all args passed) then calls
+ * sys_select() with the appropriate args. -- Cort
+ */
+int
+ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
+{
+        if ( (unsigned long)n >= 4096 )
+        {
+                unsigned long __user *buffer = (unsigned long __user *)n;
+                if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
+                    || __get_user(n, buffer)
+                    || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
+                    || __get_user(outp, ((fd_set  __user * __user *)(buffer+2)))
+                    || __get_user(exp, ((fd_set  __user * __user *)(buffer+3)))
+                    || __get_user(tvp, ((struct timeval  __user * __user *)(buffer+4))))
+                        return -EFAULT;
+        }
+        return sys_select(n, inp, outp, exp, tvp);
+}
+#endif
+
+#ifdef CONFIG_PPC64
+long ppc64_personality(unsigned long personality)
+{
+        long ret;
+
+        if (personality(current->personality) == PER_LINUX32
+            && personality == PER_LINUX)
+                personality = PER_LINUX32;
+        ret = sys_personality(personality);
+        if (ret == PER_LINUX32)
+                ret = PER_LINUX;
+        return ret;
+}
+#endif
+
+#ifdef CONFIG_PPC64
+#define OVERRIDE_MACHINE    (personality(current->personality) == PER_LINUX32)
+#else
+#define OVERRIDE_MACHINE    0
+#endif
+
+static inline int override_machine(char *mach)
+{
+        if (OVERRIDE_MACHINE) {
+                /* change ppc64 to ppc */
+                if (__put_user(0, mach+3) || __put_user(0, mach+4))
+                        return -EFAULT;
+        }
+        return 0;
+}
+
+long ppc_newuname(struct new_utsname __user * name)
+{
+        int err = 0;
+
+        down_read(&uts_sem);
+        if (copy_to_user(name, &system_utsname, sizeof(*name)))
+                err = -EFAULT;
+        up_read(&uts_sem);
+        if (!err)
+                err = override_machine(name->machine);
+        return err;
+}
+
+int sys_uname(struct old_utsname __user *name)
+{
+        int err = 0;
+        
+        down_read(&uts_sem);
+        if (copy_to_user(name, &system_utsname, sizeof(*name)))
+                err = -EFAULT;
+        up_read(&uts_sem);
+        if (!err)
+                err = override_machine(name->machine);
+        return err;
+}
+
+int sys_olduname(struct oldold_utsname __user *name)
+{
+        int error;
+
+        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 |= override_machine(name->machine);
+        up_read(&uts_sem);
+
+        return error? -EFAULT: 0;
+}
+
+#ifdef CONFIG_PPC64
+time_t sys64_time(time_t __user * 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_nsec/1000) + 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;
+}
+#endif
+
+void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
+                     unsigned long r6, unsigned long r7, unsigned long r8,
+                     struct pt_regs *regs)
+{
+        printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
+               " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
+               current, smp_processor_id());
+}
+
+void do_show_syscall_exit(unsigned long r3)
+{
+        printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());
+}