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Diffstat (limited to '')
| -rw-r--r-- | arch/alpha/kernel/osf_sys.c | 1369 |
1 files changed, 1369 insertions, 0 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c new file mode 100644 index 000000000..d5367a1c6 --- /dev/null +++ b/arch/alpha/kernel/osf_sys.c @@ -0,0 +1,1369 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/arch/alpha/kernel/osf_sys.c + * + * Copyright (C) 1995 Linus Torvalds + */ + +/* + * This file handles some of the stranger OSF/1 system call interfaces. + * Some of the system calls expect a non-C calling standard, others have + * special parameter blocks.. + */ + +#include <linux/errno.h> +#include <linux/sched/signal.h> +#include <linux/sched/mm.h> +#include <linux/sched/task_stack.h> +#include <linux/sched/cputime.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/stddef.h> +#include <linux/syscalls.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/user.h> +#include <linux/utsname.h> +#include <linux/time.h> +#include <linux/timex.h> +#include <linux/major.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/shm.h> +#include <linux/poll.h> +#include <linux/file.h> +#include <linux/types.h> +#include <linux/ipc.h> +#include <linux/namei.h> +#include <linux/uio.h> +#include <linux/vfs.h> +#include <linux/rcupdate.h> +#include <linux/slab.h> + +#include <asm/fpu.h> +#include <asm/io.h> +#include <linux/uaccess.h> +#include <asm/sysinfo.h> +#include <asm/thread_info.h> +#include <asm/hwrpb.h> +#include <asm/processor.h> + +/* + * Brk needs to return an error. Still support Linux's brk(0) query idiom, + * which OSF programs just shouldn't be doing. We're still not quite + * identical to OSF as we don't return 0 on success, but doing otherwise + * would require changes to libc. Hopefully this is good enough. + */ +SYSCALL_DEFINE1(osf_brk, unsigned long, brk) +{ + unsigned long retval = sys_brk(brk); + if (brk && brk != retval) + retval = -ENOMEM; + return retval; +} + +/* + * This is pure guess-work.. + */ +SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, + unsigned long, text_len, unsigned long, bss_start, + unsigned long, bss_len) +{ + struct mm_struct *mm; + + mm = current->mm; + mm->end_code = bss_start + bss_len; + mm->start_brk = bss_start + bss_len; + mm->brk = bss_start + bss_len; +#if 0 + printk("set_program_attributes(%lx %lx %lx %lx)\n", + text_start, text_len, bss_start, bss_len); +#endif + return 0; +} + +/* + * OSF/1 directory handling functions... + * + * The "getdents()" interface is much more sane: the "basep" stuff is + * braindamage (it can't really handle filesystems where the directory + * offset differences aren't the same as "d_reclen"). + */ +#define NAME_OFFSET offsetof (struct osf_dirent, d_name) + +struct osf_dirent { + unsigned int d_ino; + unsigned short d_reclen; + unsigned short d_namlen; + char d_name[1]; +}; + +struct osf_dirent_callback { + struct dir_context ctx; + struct osf_dirent __user *dirent; + long __user *basep; + unsigned int count; + int error; +}; + +static int +osf_filldir(struct dir_context *ctx, const char *name, int namlen, + loff_t offset, u64 ino, unsigned int d_type) +{ + struct osf_dirent __user *dirent; + struct osf_dirent_callback *buf = + container_of(ctx, struct osf_dirent_callback, ctx); + unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); + unsigned int d_ino; + + buf->error = -EINVAL; /* only used if we fail */ + if (reclen > buf->count) + return -EINVAL; + d_ino = ino; + if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { + buf->error = -EOVERFLOW; + return -EOVERFLOW; + } + if (buf->basep) { + if (put_user(offset, buf->basep)) + goto Efault; + buf->basep = NULL; + } + dirent = buf->dirent; + if (put_user(d_ino, &dirent->d_ino) || + put_user(namlen, &dirent->d_namlen) || + put_user(reclen, &dirent->d_reclen) || + copy_to_user(dirent->d_name, name, namlen) || + put_user(0, dirent->d_name + namlen)) + goto Efault; + dirent = (void __user *)dirent + reclen; + buf->dirent = dirent; + buf->count -= reclen; + return 0; +Efault: + buf->error = -EFAULT; + return -EFAULT; +} + +SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, + struct osf_dirent __user *, dirent, unsigned int, count, + long __user *, basep) +{ + int error; + struct fd arg = fdget_pos(fd); + struct osf_dirent_callback buf = { + .ctx.actor = osf_filldir, + .dirent = dirent, + .basep = basep, + .count = count + }; + + if (!arg.file) + return -EBADF; + + error = iterate_dir(arg.file, &buf.ctx); + if (error >= 0) + error = buf.error; + if (count != buf.count) + error = count - buf.count; + + fdput_pos(arg); + return error; +} + +#undef NAME_OFFSET + +SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, unsigned long, fd, + unsigned long, off) +{ + unsigned long ret = -EINVAL; + +#if 0 + if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) + printk("%s: unimplemented OSF mmap flags %04lx\n", + current->comm, flags); +#endif + if ((off + PAGE_ALIGN(len)) < off) + goto out; + if (off & ~PAGE_MASK) + goto out; + ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + out: + return ret; +} + +struct osf_stat { + int st_dev; + int st_pad1; + unsigned st_mode; + unsigned short st_nlink; + short st_nlink_reserved; + unsigned st_uid; + unsigned st_gid; + int st_rdev; + int st_ldev; + long st_size; + int st_pad2; + int st_uatime; + int st_pad3; + int st_umtime; + int st_pad4; + int st_uctime; + int st_pad5; + int st_pad6; + unsigned st_flags; + unsigned st_gen; + long st_spare[4]; + unsigned st_ino; + int st_ino_reserved; + int st_atime; + int st_atime_reserved; + int st_mtime; + int st_mtime_reserved; + int st_ctime; + int st_ctime_reserved; + long st_blksize; + long st_blocks; +}; + +/* + * The OSF/1 statfs structure is much larger, but this should + * match the beginning, at least. + */ +struct osf_statfs { + short f_type; + short f_flags; + int f_fsize; + int f_bsize; + int f_blocks; + int f_bfree; + int f_bavail; + int f_files; + int f_ffree; + __kernel_fsid_t f_fsid; +}; + +struct osf_statfs64 { + short f_type; + short f_flags; + int f_pad1; + int f_pad2; + int f_pad3; + int f_pad4; + int f_pad5; + int f_pad6; + int f_pad7; + __kernel_fsid_t f_fsid; + u_short f_namemax; + short f_reserved1; + int f_spare[8]; + char f_pad8[90]; + char f_pad9[90]; + long mount_info[10]; + u_long f_flags2; + long f_spare2[14]; + long f_fsize; + long f_bsize; + long f_blocks; + long f_bfree; + long f_bavail; + long f_files; + long f_ffree; +}; + +static int +linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) +{ + struct osf_stat tmp = { 0 }; + + tmp.st_dev = lstat->dev; + tmp.st_mode = lstat->mode; + tmp.st_nlink = lstat->nlink; + tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); + tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); + tmp.st_rdev = lstat->rdev; + tmp.st_ldev = lstat->rdev; + tmp.st_size = lstat->size; + tmp.st_uatime = lstat->atime.tv_nsec / 1000; + tmp.st_umtime = lstat->mtime.tv_nsec / 1000; + tmp.st_uctime = lstat->ctime.tv_nsec / 1000; + tmp.st_ino = lstat->ino; + tmp.st_atime = lstat->atime.tv_sec; + tmp.st_mtime = lstat->mtime.tv_sec; + tmp.st_ctime = lstat->ctime.tv_sec; + tmp.st_blksize = lstat->blksize; + tmp.st_blocks = lstat->blocks; + + return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; +} + +static int +linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, + unsigned long bufsiz) +{ + struct osf_statfs tmp_stat; + + tmp_stat.f_type = linux_stat->f_type; + tmp_stat.f_flags = 0; /* mount flags */ + tmp_stat.f_fsize = linux_stat->f_frsize; + tmp_stat.f_bsize = linux_stat->f_bsize; + tmp_stat.f_blocks = linux_stat->f_blocks; + tmp_stat.f_bfree = linux_stat->f_bfree; + tmp_stat.f_bavail = linux_stat->f_bavail; + tmp_stat.f_files = linux_stat->f_files; + tmp_stat.f_ffree = linux_stat->f_ffree; + tmp_stat.f_fsid = linux_stat->f_fsid; + if (bufsiz > sizeof(tmp_stat)) + bufsiz = sizeof(tmp_stat); + return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; +} + +static int +linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, + unsigned long bufsiz) +{ + struct osf_statfs64 tmp_stat = { 0 }; + + tmp_stat.f_type = linux_stat->f_type; + tmp_stat.f_fsize = linux_stat->f_frsize; + tmp_stat.f_bsize = linux_stat->f_bsize; + tmp_stat.f_blocks = linux_stat->f_blocks; + tmp_stat.f_bfree = linux_stat->f_bfree; + tmp_stat.f_bavail = linux_stat->f_bavail; + tmp_stat.f_files = linux_stat->f_files; + tmp_stat.f_ffree = linux_stat->f_ffree; + tmp_stat.f_fsid = linux_stat->f_fsid; + if (bufsiz > sizeof(tmp_stat)) + bufsiz = sizeof(tmp_stat); + return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; +} + +SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, + struct osf_statfs __user *, buffer, unsigned long, bufsiz) +{ + struct kstatfs linux_stat; + int error = user_statfs(pathname, &linux_stat); + if (!error) + error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); + return error; +} + +SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) +{ + struct kstat stat; + int error; + + error = vfs_stat(name, &stat); + if (error) + return error; + + return linux_to_osf_stat(&stat, buf); +} + +SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) +{ + struct kstat stat; + int error; + + error = vfs_lstat(name, &stat); + if (error) + return error; + + return linux_to_osf_stat(&stat, buf); +} + +SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) +{ + struct kstat stat; + int error; + + error = vfs_fstat(fd, &stat); + if (error) + return error; + + return linux_to_osf_stat(&stat, buf); +} + +SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, + struct osf_statfs __user *, buffer, unsigned long, bufsiz) +{ + struct kstatfs linux_stat; + int error = fd_statfs(fd, &linux_stat); + if (!error) + error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); + return error; +} + +SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, + struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) +{ + struct kstatfs linux_stat; + int error = user_statfs(pathname, &linux_stat); + if (!error) + error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); + return error; +} + +SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, + struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) +{ + struct kstatfs linux_stat; + int error = fd_statfs(fd, &linux_stat); + if (!error) + error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); + return error; +} + +/* + * Uhh.. OSF/1 mount parameters aren't exactly obvious.. + * + * Although to be frank, neither are the native Linux/i386 ones.. + */ +struct ufs_args { + char __user *devname; + int flags; + uid_t exroot; +}; + +struct cdfs_args { + char __user *devname; + int flags; + uid_t exroot; + + /* This has lots more here, which Linux handles with the option block + but I'm too lazy to do the translation into ASCII. */ +}; + +struct procfs_args { + char __user *devname; + int flags; + uid_t exroot; +}; + +/* + * We can't actually handle ufs yet, so we translate UFS mounts to + * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS + * layout is so braindead it's a major headache doing it. + * + * Just how long ago was it written? OTOH our UFS driver may be still + * unhappy with OSF UFS. [CHECKME] + */ +static int +osf_ufs_mount(const char __user *dirname, + struct ufs_args __user *args, int flags) +{ + int retval; + struct cdfs_args tmp; + struct filename *devname; + + retval = -EFAULT; + if (copy_from_user(&tmp, args, sizeof(tmp))) + goto out; + devname = getname(tmp.devname); + retval = PTR_ERR(devname); + if (IS_ERR(devname)) + goto out; + retval = do_mount(devname->name, dirname, "ext2", flags, NULL); + putname(devname); + out: + return retval; +} + +static int +osf_cdfs_mount(const char __user *dirname, + struct cdfs_args __user *args, int flags) +{ + int retval; + struct cdfs_args tmp; + struct filename *devname; + + retval = -EFAULT; + if (copy_from_user(&tmp, args, sizeof(tmp))) + goto out; + devname = getname(tmp.devname); + retval = PTR_ERR(devname); + if (IS_ERR(devname)) + goto out; + retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); + putname(devname); + out: + return retval; +} + +static int +osf_procfs_mount(const char __user *dirname, + struct procfs_args __user *args, int flags) +{ + struct procfs_args tmp; + + if (copy_from_user(&tmp, args, sizeof(tmp))) + return -EFAULT; + + return do_mount("", dirname, "proc", flags, NULL); +} + +SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, + int, flag, void __user *, data) +{ + int retval; + + switch (typenr) { + case 1: + retval = osf_ufs_mount(path, data, flag); + break; + case 6: + retval = osf_cdfs_mount(path, data, flag); + break; + case 9: + retval = osf_procfs_mount(path, data, flag); + break; + default: + retval = -EINVAL; + printk("osf_mount(%ld, %x)\n", typenr, flag); + } + + return retval; +} + +SYSCALL_DEFINE1(osf_utsname, char __user *, name) +{ + char tmp[5 * 32]; + + down_read(&uts_sem); + memcpy(tmp + 0 * 32, utsname()->sysname, 32); + memcpy(tmp + 1 * 32, utsname()->nodename, 32); + memcpy(tmp + 2 * 32, utsname()->release, 32); + memcpy(tmp + 3 * 32, utsname()->version, 32); + memcpy(tmp + 4 * 32, utsname()->machine, 32); + up_read(&uts_sem); + + if (copy_to_user(name, tmp, sizeof(tmp))) + return -EFAULT; + return 0; +} + +SYSCALL_DEFINE0(getpagesize) +{ + return PAGE_SIZE; +} + +SYSCALL_DEFINE0(getdtablesize) +{ + return sysctl_nr_open; +} + +/* + * For compatibility with OSF/1 only. Use utsname(2) instead. + */ +SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) +{ + int len; + char *kname; + char tmp[32]; + + if (namelen < 0 || namelen > 32) + namelen = 32; + + down_read(&uts_sem); + kname = utsname()->domainname; + len = strnlen(kname, namelen); + len = min(len + 1, namelen); + memcpy(tmp, kname, len); + up_read(&uts_sem); + + if (copy_to_user(name, tmp, len)) + return -EFAULT; + return 0; +} + +/* + * The following stuff should move into a header file should it ever + * be labeled "officially supported." Right now, there is just enough + * support to avoid applications (such as tar) printing error + * messages. The attributes are not really implemented. + */ + +/* + * Values for Property list entry flag + */ +#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry + by default */ +#define PLE_FLAG_MASK 0x1 /* Valid flag values */ +#define PLE_FLAG_ALL -1 /* All flag value */ + +struct proplistname_args { + unsigned int pl_mask; + unsigned int pl_numnames; + char **pl_names; +}; + +union pl_args { + struct setargs { + char __user *path; + long follow; + long nbytes; + char __user *buf; + } set; + struct fsetargs { + long fd; + long nbytes; + char __user *buf; + } fset; + struct getargs { + char __user *path; + long follow; + struct proplistname_args __user *name_args; + long nbytes; + char __user *buf; + int __user *min_buf_size; + } get; + struct fgetargs { + long fd; + struct proplistname_args __user *name_args; + long nbytes; + char __user *buf; + int __user *min_buf_size; + } fget; + struct delargs { + char __user *path; + long follow; + struct proplistname_args __user *name_args; + } del; + struct fdelargs { + long fd; + struct proplistname_args __user *name_args; + } fdel; +}; + +enum pl_code { + PL_SET = 1, PL_FSET = 2, + PL_GET = 3, PL_FGET = 4, + PL_DEL = 5, PL_FDEL = 6 +}; + +SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, + union pl_args __user *, args) +{ + long error; + int __user *min_buf_size_ptr; + + switch (code) { + case PL_SET: + if (get_user(error, &args->set.nbytes)) + error = -EFAULT; + break; + case PL_FSET: + if (get_user(error, &args->fset.nbytes)) + error = -EFAULT; + break; + case PL_GET: + error = get_user(min_buf_size_ptr, &args->get.min_buf_size); + if (error) + break; + error = put_user(0, min_buf_size_ptr); + break; + case PL_FGET: + error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); + if (error) + break; + error = put_user(0, min_buf_size_ptr); + break; + case PL_DEL: + case PL_FDEL: + error = 0; + break; + default: + error = -EOPNOTSUPP; + break; + } + return error; +} + +SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, + struct sigstack __user *, uoss) +{ + unsigned long usp = rdusp(); + unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; + unsigned long oss_os = on_sig_stack(usp); + int error; + + if (uss) { + void __user *ss_sp; + + error = -EFAULT; + if (get_user(ss_sp, &uss->ss_sp)) + goto out; + + /* If the current stack was set with sigaltstack, don't + swap stacks while we are on it. */ + error = -EPERM; + if (current->sas_ss_sp && on_sig_stack(usp)) + goto out; + + /* Since we don't know the extent of the stack, and we don't + track onstack-ness, but rather calculate it, we must + presume a size. Ho hum this interface is lossy. */ + current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; + current->sas_ss_size = SIGSTKSZ; + } + + if (uoss) { + error = -EFAULT; + if (put_user(oss_sp, &uoss->ss_sp) || + put_user(oss_os, &uoss->ss_onstack)) + goto out; + } + + error = 0; + out: + return error; +} + +SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) +{ + const char *sysinfo_table[] = { + utsname()->sysname, + utsname()->nodename, + utsname()->release, + utsname()->version, + utsname()->machine, + "alpha", /* instruction set architecture */ + "dummy", /* hardware serial number */ + "dummy", /* hardware manufacturer */ + "dummy", /* secure RPC domain */ + }; + unsigned long offset; + const char *res; + long len; + char tmp[__NEW_UTS_LEN + 1]; + + offset = command-1; + if (offset >= ARRAY_SIZE(sysinfo_table)) { + /* Digital UNIX has a few unpublished interfaces here */ + printk("sysinfo(%d)", command); + return -EINVAL; + } + + down_read(&uts_sem); + res = sysinfo_table[offset]; + len = strlen(res)+1; + if ((unsigned long)len > (unsigned long)count) + len = count; + memcpy(tmp, res, len); + up_read(&uts_sem); + if (copy_to_user(buf, tmp, len)) + return -EFAULT; + return 0; +} + +SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, + unsigned long, nbytes, int __user *, start, void __user *, arg) +{ + unsigned long w; + struct percpu_struct *cpu; + + switch (op) { + case GSI_IEEE_FP_CONTROL: + /* Return current software fp control & status bits. */ + /* Note that DU doesn't verify available space here. */ + + w = current_thread_info()->ieee_state & IEEE_SW_MASK; + w = swcr_update_status(w, rdfpcr()); + if (put_user(w, (unsigned long __user *) buffer)) + return -EFAULT; + return 0; + + case GSI_IEEE_STATE_AT_SIGNAL: + /* + * Not sure anybody will ever use this weird stuff. These + * ops can be used (under OSF/1) to set the fpcr that should + * be used when a signal handler starts executing. + */ + break; + + case GSI_UACPROC: + if (nbytes < sizeof(unsigned int)) + return -EINVAL; + w = current_thread_info()->status & UAC_BITMASK; + if (put_user(w, (unsigned int __user *)buffer)) + return -EFAULT; + return 1; + + case GSI_PROC_TYPE: + if (nbytes < sizeof(unsigned long)) + return -EINVAL; + cpu = (struct percpu_struct*) + ((char*)hwrpb + hwrpb->processor_offset); + w = cpu->type; + if (put_user(w, (unsigned long __user*)buffer)) + return -EFAULT; + return 1; + + case GSI_GET_HWRPB: + if (nbytes > sizeof(*hwrpb)) + return -EINVAL; + if (copy_to_user(buffer, hwrpb, nbytes) != 0) + return -EFAULT; + return 1; + + default: + break; + } + + return -EOPNOTSUPP; +} + +SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, + unsigned long, nbytes, int __user *, start, void __user *, arg) +{ + switch (op) { + case SSI_IEEE_FP_CONTROL: { + unsigned long swcr, fpcr; + unsigned int *state; + + /* + * Alpha Architecture Handbook 4.7.7.3: + * To be fully IEEE compiant, we must track the current IEEE + * exception state in software, because spurious bits can be + * set in the trap shadow of a software-complete insn. + */ + + if (get_user(swcr, (unsigned long __user *)buffer)) + return -EFAULT; + state = ¤t_thread_info()->ieee_state; + + /* Update softare trap enable bits. */ + *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); + + /* Update the real fpcr. */ + fpcr = rdfpcr() & FPCR_DYN_MASK; + fpcr |= ieee_swcr_to_fpcr(swcr); + wrfpcr(fpcr); + + return 0; + } + + case SSI_IEEE_RAISE_EXCEPTION: { + unsigned long exc, swcr, fpcr, fex; + unsigned int *state; + + if (get_user(exc, (unsigned long __user *)buffer)) + return -EFAULT; + state = ¤t_thread_info()->ieee_state; + exc &= IEEE_STATUS_MASK; + + /* Update softare trap enable bits. */ + swcr = (*state & IEEE_SW_MASK) | exc; + *state |= exc; + + /* Update the real fpcr. */ + fpcr = rdfpcr(); + fpcr |= ieee_swcr_to_fpcr(swcr); + wrfpcr(fpcr); + + /* If any exceptions set by this call, and are unmasked, + send a signal. Old exceptions are not signaled. */ + fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; + if (fex) { + int si_code = FPE_FLTUNK; + + if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; + if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; + if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; + if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; + if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; + if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; + + send_sig_fault(SIGFPE, si_code, + (void __user *)NULL, /* FIXME */ + 0, current); + } + return 0; + } + + case SSI_IEEE_STATE_AT_SIGNAL: + case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: + /* + * Not sure anybody will ever use this weird stuff. These + * ops can be used (under OSF/1) to set the fpcr that should + * be used when a signal handler starts executing. + */ + break; + + case SSI_NVPAIRS: { + unsigned __user *p = buffer; + unsigned i; + + for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { + unsigned v, w, status; + + if (get_user(v, p) || get_user(w, p + 1)) + return -EFAULT; + switch (v) { + case SSIN_UACPROC: + w &= UAC_BITMASK; + status = current_thread_info()->status; + status = (status & ~UAC_BITMASK) | w; + current_thread_info()->status = status; + break; + + default: + return -EOPNOTSUPP; + } + } + return 0; + } + + case SSI_LMF: + return 0; + + default: + break; + } + + return -EOPNOTSUPP; +} + +/* Translations due to the fact that OSF's time_t is an int. Which + affects all sorts of things, like timeval and itimerval. */ + +extern struct timezone sys_tz; + +struct timeval32 +{ + int tv_sec, tv_usec; +}; + +struct itimerval32 +{ + struct timeval32 it_interval; + struct timeval32 it_value; +}; + +static inline long +get_tv32(struct timespec64 *o, struct timeval32 __user *i) +{ + struct timeval32 tv; + if (copy_from_user(&tv, i, sizeof(struct timeval32))) + return -EFAULT; + o->tv_sec = tv.tv_sec; + o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; + return 0; +} + +static inline long +put_tv32(struct timeval32 __user *o, struct timespec64 *i) +{ + return copy_to_user(o, &(struct timeval32){ + .tv_sec = i->tv_sec, + .tv_usec = i->tv_nsec / NSEC_PER_USEC}, + sizeof(struct timeval32)); +} + +static inline long +put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i) +{ + return copy_to_user(o, &(struct timeval32){ + .tv_sec = i->tv_sec, + .tv_usec = i->tv_usec}, + sizeof(struct timeval32)); +} + +static inline void +jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) +{ + value->tv_usec = (jiffies % HZ) * (1000000L / HZ); + value->tv_sec = jiffies / HZ; +} + +SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, + struct timezone __user *, tz) +{ + if (tv) { + struct timespec64 kts; + + ktime_get_real_ts64(&kts); + if (put_tv32(tv, &kts)) + return -EFAULT; + } + if (tz) { + if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) + return -EFAULT; + } + return 0; +} + +SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, + struct timezone __user *, tz) +{ + struct timespec64 kts; + struct timezone ktz; + + if (tv) { + if (get_tv32(&kts, tv)) + return -EFAULT; + } + if (tz) { + if (copy_from_user(&ktz, tz, sizeof(*tz))) + return -EFAULT; + } + + return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); +} + +asmlinkage long sys_ni_posix_timers(void); + +SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, + struct timeval32 __user *, tvs) +{ + struct timespec64 tv[2]; + + if (tvs) { + if (get_tv32(&tv[0], &tvs[0]) || + get_tv32(&tv[1], &tvs[1])) + return -EFAULT; + + if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || + tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) + return -EINVAL; + } + + return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); +} + +SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, + fd_set __user *, exp, struct timeval32 __user *, tvp) +{ + struct timespec64 end_time, *to = NULL; + if (tvp) { + struct timespec64 tv; + to = &end_time; + + if (get_tv32(&tv, tvp)) + return -EFAULT; + + if (tv.tv_sec < 0 || tv.tv_nsec < 0) + return -EINVAL; + + if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) + return -EINVAL; + + } + + /* OSF does not copy back the remaining time. */ + return core_sys_select(n, inp, outp, exp, to); +} + +struct rusage32 { + struct timeval32 ru_utime; /* user time used */ + struct timeval32 ru_stime; /* system time used */ + long ru_maxrss; /* maximum resident set size */ + long ru_ixrss; /* integral shared memory size */ + long ru_idrss; /* integral unshared data size */ + long ru_isrss; /* integral unshared stack size */ + long ru_minflt; /* page reclaims */ + long ru_majflt; /* page faults */ + long ru_nswap; /* swaps */ + long ru_inblock; /* block input operations */ + long ru_oublock; /* block output operations */ + long ru_msgsnd; /* messages sent */ + long ru_msgrcv; /* messages received */ + long ru_nsignals; /* signals received */ + long ru_nvcsw; /* voluntary context switches */ + long ru_nivcsw; /* involuntary " */ +}; + +SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) +{ + struct rusage32 r; + u64 utime, stime; + unsigned long utime_jiffies, stime_jiffies; + + if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) + return -EINVAL; + + memset(&r, 0, sizeof(r)); + switch (who) { + case RUSAGE_SELF: + task_cputime(current, &utime, &stime); + utime_jiffies = nsecs_to_jiffies(utime); + stime_jiffies = nsecs_to_jiffies(stime); + jiffies_to_timeval32(utime_jiffies, &r.ru_utime); + jiffies_to_timeval32(stime_jiffies, &r.ru_stime); + r.ru_minflt = current->min_flt; + r.ru_majflt = current->maj_flt; + break; + case RUSAGE_CHILDREN: + utime_jiffies = nsecs_to_jiffies(current->signal->cutime); + stime_jiffies = nsecs_to_jiffies(current->signal->cstime); + jiffies_to_timeval32(utime_jiffies, &r.ru_utime); + jiffies_to_timeval32(stime_jiffies, &r.ru_stime); + r.ru_minflt = current->signal->cmin_flt; + r.ru_majflt = current->signal->cmaj_flt; + break; + } + + return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; +} + +SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, + struct rusage32 __user *, ur) +{ + struct rusage r; + long err = kernel_wait4(pid, ustatus, options, &r); + if (err <= 0) + return err; + if (!ur) + return err; + if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) + return -EFAULT; + if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) + return -EFAULT; + if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, + sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) + return -EFAULT; + return err; +} + +/* + * I don't know what the parameters are: the first one + * seems to be a timeval pointer, and I suspect the second + * one is the time remaining.. Ho humm.. No documentation. + */ +SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, + struct timeval32 __user *, remain) +{ + struct timespec64 tmp; + unsigned long ticks; + + if (get_tv32(&tmp, sleep)) + goto fault; + + ticks = timespec64_to_jiffies(&tmp); + + ticks = schedule_timeout_interruptible(ticks); + + if (remain) { + jiffies_to_timespec64(ticks, &tmp); + if (put_tv32(remain, &tmp)) + goto fault; + } + + return 0; + fault: + return -EFAULT; +} + + +struct timex32 { + unsigned int modes; /* mode selector */ + long offset; /* time offset (usec) */ + long freq; /* frequency offset (scaled ppm) */ + long maxerror; /* maximum error (usec) */ + long esterror; /* estimated error (usec) */ + int status; /* clock command/status */ + long constant; /* pll time constant */ + long precision; /* clock precision (usec) (read only) */ + long tolerance; /* clock frequency tolerance (ppm) + * (read only) + */ + struct timeval32 time; /* (read only) */ + long tick; /* (modified) usecs between clock ticks */ + + long ppsfreq; /* pps frequency (scaled ppm) (ro) */ + long jitter; /* pps jitter (us) (ro) */ + int shift; /* interval duration (s) (shift) (ro) */ + long stabil; /* pps stability (scaled ppm) (ro) */ + long jitcnt; /* jitter limit exceeded (ro) */ + long calcnt; /* calibration intervals (ro) */ + long errcnt; /* calibration errors (ro) */ + long stbcnt; /* stability limit exceeded (ro) */ + + int :32; int :32; int :32; int :32; + int :32; int :32; int :32; int :32; + int :32; int :32; int :32; int :32; +}; + +SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) +{ + struct __kernel_timex txc; + int ret; + + /* copy relevant bits of struct timex. */ + if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || + copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - + offsetof(struct timex32, tick))) + return -EFAULT; + + ret = do_adjtimex(&txc); + if (ret < 0) + return ret; + + /* copy back to timex32 */ + if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || + (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - + offsetof(struct timex32, tick))) || + (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || + (put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) + return -EFAULT; + + return ret; +} + +/* Get an address range which is currently unmapped. Similar to the + generic version except that we know how to honor ADDR_LIMIT_32BIT. */ + +static unsigned long +arch_get_unmapped_area_1(unsigned long addr, unsigned long len, + unsigned long limit) +{ + struct vm_unmapped_area_info info; + + info.flags = 0; + info.length = len; + info.low_limit = addr; + info.high_limit = limit; + info.align_mask = 0; + info.align_offset = 0; + return vm_unmapped_area(&info); +} + +unsigned long +arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + unsigned long limit; + + /* "32 bit" actually means 31 bit, since pointers sign extend. */ + if (current->personality & ADDR_LIMIT_32BIT) + limit = 0x80000000; + else + limit = TASK_SIZE; + + if (len > limit) + return -ENOMEM; + + if (flags & MAP_FIXED) + return addr; + + /* First, see if the given suggestion fits. + + The OSF/1 loader (/sbin/loader) relies on us returning an + address larger than the requested if one exists, which is + a terribly broken way to program. + + That said, I can see the use in being able to suggest not + merely specific addresses, but regions of memory -- perhaps + this feature should be incorporated into all ports? */ + + if (addr) { + addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); + if (addr != (unsigned long) -ENOMEM) + return addr; + } + + /* Next, try allocating at TASK_UNMAPPED_BASE. */ + addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), + len, limit); + if (addr != (unsigned long) -ENOMEM) + return addr; + + /* Finally, try allocating in low memory. */ + addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); + + return addr; +} + +#ifdef CONFIG_OSF4_COMPAT +/* Clear top 32 bits of iov_len in the user's buffer for + compatibility with old versions of OSF/1 where iov_len + was defined as int. */ +static int +osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) +{ + unsigned long i; + + for (i = 0 ; i < count ; i++) { + int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; + + if (put_user(0, iov_len_high)) + return -EFAULT; + } + return 0; +} +#endif + +SYSCALL_DEFINE3(osf_readv, unsigned long, fd, + const struct iovec __user *, vector, unsigned long, count) +{ +#ifdef CONFIG_OSF4_COMPAT + if (unlikely(personality(current->personality) == PER_OSF4)) + if (osf_fix_iov_len(vector, count)) + return -EFAULT; +#endif + + return sys_readv(fd, vector, count); +} + +SYSCALL_DEFINE3(osf_writev, unsigned long, fd, + const struct iovec __user *, vector, unsigned long, count) +{ +#ifdef CONFIG_OSF4_COMPAT + if (unlikely(personality(current->personality) == PER_OSF4)) + if (osf_fix_iov_len(vector, count)) + return -EFAULT; +#endif + return sys_writev(fd, vector, count); +} + +SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) +{ + int prio = sys_getpriority(which, who); + if (prio >= 0) { + /* Return value is the unbiased priority, i.e. 20 - prio. + This does result in negative return values, so signal + no error */ + force_successful_syscall_return(); + prio = 20 - prio; + } + return prio; +} + +SYSCALL_DEFINE0(getxuid) +{ + current_pt_regs()->r20 = sys_geteuid(); + return sys_getuid(); +} + +SYSCALL_DEFINE0(getxgid) +{ + current_pt_regs()->r20 = sys_getegid(); + return sys_getgid(); +} + +SYSCALL_DEFINE0(getxpid) +{ + current_pt_regs()->r20 = sys_getppid(); + return sys_getpid(); +} + +SYSCALL_DEFINE0(alpha_pipe) +{ + int fd[2]; + int res = do_pipe_flags(fd, 0); + if (!res) { + /* The return values are in $0 and $20. */ + current_pt_regs()->r20 = fd[1]; + res = fd[0]; + } + return res; +} + +SYSCALL_DEFINE1(sethae, unsigned long, val) +{ + current_pt_regs()->hae = val; + return 0; +} |