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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/s390/kernel/sys_s390.c | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/s390/kernel/sys_s390.c')
-rw-r--r-- | arch/s390/kernel/sys_s390.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c new file mode 100644 index 000000000000..efe6b83b53f7 --- /dev/null +++ b/arch/s390/kernel/sys_s390.c @@ -0,0 +1,270 @@ +/* + * arch/s390/kernel/sys_s390.c + * + * S390 version + * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), + * Thomas Spatzier (tspat@de.ibm.com) + * + * Derived from "arch/i386/kernel/sys_i386.c" + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/s390 + * 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> +#ifdef CONFIG_ARCH_S390X +#include <linux/personality.h> +#endif /* CONFIG_ARCH_S390X */ + +#include <asm/uaccess.h> +#include <asm/ipc.h> + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way Unix traditionally does this, though. + */ +asmlinkage long sys_pipe(unsigned long __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; +} + +/* 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) +{ + long error = -EBADF; + struct file * file = NULL; + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + if (!(flags & MAP_ANONYMOUS)) { + file = fget(fd); + if (!file) + goto out; + } + + down_write(¤t->mm->mmap_sem); + error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->mm->mmap_sem); + + if (file) + fput(file); +out: + return error; +} + +/* + * Perform the select(nd, in, out, ex, tv) and mmap() system + * calls. Linux for S/390 isn't able to handle more than 5 + * 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 long sys_mmap2(struct mmap_arg_struct __user *arg) +{ + struct mmap_arg_struct a; + int error = -EFAULT; + + if (copy_from_user(&a, arg, sizeof(a))) + goto out; + error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); +out: + return error; +} + +asmlinkage long old_mmap(struct mmap_arg_struct __user *arg) +{ + struct mmap_arg_struct a; + long error = -EFAULT; + + if (copy_from_user(&a, arg, sizeof(a))) + goto out; + + error = -EINVAL; + if (a.offset & ~PAGE_MASK) + goto out; + + error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); +out: + return error; +} + +#ifndef CONFIG_ARCH_S390X +struct sel_arg_struct { + unsigned long n; + fd_set *inp, *outp, *exp; + struct timeval *tvp; +}; + +asmlinkage long old_select(struct sel_arg_struct __user *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); + +} +#endif /* CONFIG_ARCH_S390X */ + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +asmlinkage long sys_ipc(uint call, int first, unsigned long second, + unsigned long third, void __user *ptr) +{ + struct ipc_kludge tmp; + int ret; + + switch (call) { + case SEMOP: + return sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, NULL); + case SEMTIMEDOP: + return sys_semtimedop(first, (struct sembuf __user *)ptr, + (unsigned)second, + (const struct timespec __user *) third); + case SEMGET: + return sys_semget(first, (int)second, third); + case SEMCTL: { + union semun fourth; + if (!ptr) + return -EINVAL; + if (get_user(fourth.__pad, (void __user * __user *) ptr)) + return -EFAULT; + return sys_semctl(first, (int)second, third, fourth); + } + case MSGSND: + return sys_msgsnd (first, (struct msgbuf __user *) ptr, + (size_t)second, third); + break; + case MSGRCV: + if (!ptr) + return -EINVAL; + if (copy_from_user (&tmp, (struct ipc_kludge __user *) ptr, + sizeof (struct ipc_kludge))) + return -EFAULT; + return sys_msgrcv (first, tmp.msgp, + (size_t)second, tmp.msgtyp, third); + case MSGGET: + return sys_msgget((key_t)first, (int)second); + case MSGCTL: + return sys_msgctl(first, (int)second, + (struct msqid_ds __user *)ptr); + + case SHMAT: { + ulong raddr; + ret = do_shmat(first, (char __user *)ptr, + (int)second, &raddr); + if (ret) + return ret; + return put_user (raddr, (ulong __user *) third); + break; + } + case SHMDT: + return sys_shmdt ((char __user *)ptr); + case SHMGET: + return sys_shmget(first, (size_t)second, third); + case SHMCTL: + return sys_shmctl(first, (int)second, + (struct shmid_ds __user *) ptr); + default: + return -ENOSYS; + + } + + return -EINVAL; +} + +#ifdef CONFIG_ARCH_S390X +asmlinkage long s390x_newuname(struct new_utsname __user *name) +{ + int ret = sys_newuname(name); + + if (current->personality == PER_LINUX32 && !ret) { + ret = copy_to_user(name->machine, "s390\0\0\0\0", 8); + if (ret) ret = -EFAULT; + } + return ret; +} + +asmlinkage long s390x_personality(unsigned long personality) +{ + int ret; + + if (current->personality == PER_LINUX32 && personality == PER_LINUX) + personality = PER_LINUX32; + ret = sys_personality(personality); + if (ret == PER_LINUX32) + ret = PER_LINUX; + + return ret; +} +#endif /* CONFIG_ARCH_S390X */ + +/* + * Wrapper function for sys_fadvise64/fadvise64_64 + */ +#ifndef CONFIG_ARCH_S390X + +asmlinkage long +s390_fadvise64(int fd, u32 offset_high, u32 offset_low, size_t len, int advice) +{ + return sys_fadvise64(fd, (u64) offset_high << 32 | offset_low, + len, advice); +} + +#endif + +struct fadvise64_64_args { + int fd; + long long offset; + long long len; + int advice; +}; + +asmlinkage long +s390_fadvise64_64(struct fadvise64_64_args __user *args) +{ + struct fadvise64_64_args a; + + if ( copy_from_user(&a, args, sizeof(a)) ) + return -EFAULT; + return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); +} + |