Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/m68knommu/kernel/sys_m68k.c |
| 3 | * |
| 4 | * This file contains various random system calls that |
| 5 | * have a non-standard calling sequence on the Linux/m68k |
| 6 | * platform. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/errno.h> |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/sem.h> |
| 14 | #include <linux/msg.h> |
| 15 | #include <linux/shm.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/syscalls.h> |
| 18 | #include <linux/mman.h> |
| 19 | #include <linux/file.h> |
| 20 | #include <linux/utsname.h> |
Adrian Bunk | cba4fbb | 2007-10-16 23:29:24 -0700 | [diff] [blame] | 21 | #include <linux/ipc.h> |
Greg Ungerer | 405d296 | 2007-08-24 09:26:12 +1000 | [diff] [blame] | 22 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <asm/setup.h> |
| 25 | #include <asm/uaccess.h> |
| 26 | #include <asm/cachectl.h> |
| 27 | #include <asm/traps.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/cacheflush.h> |
Arnd Bergmann | fe74290 | 2006-10-02 02:18:34 -0700 | [diff] [blame] | 29 | #include <asm/unistd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | /* |
| 32 | * sys_pipe() is the normal C calling standard for creating |
| 33 | * a pipe. It's not the way unix traditionally does this, though. |
| 34 | */ |
| 35 | asmlinkage int sys_pipe(unsigned long * fildes) |
| 36 | { |
| 37 | int fd[2]; |
| 38 | int error; |
| 39 | |
| 40 | error = do_pipe(fd); |
| 41 | if (!error) { |
| 42 | if (copy_to_user(fildes, fd, 2*sizeof(int))) |
| 43 | error = -EFAULT; |
| 44 | } |
| 45 | return error; |
| 46 | } |
| 47 | |
| 48 | /* common code for old and new mmaps */ |
| 49 | static inline long do_mmap2( |
| 50 | unsigned long addr, unsigned long len, |
| 51 | unsigned long prot, unsigned long flags, |
| 52 | unsigned long fd, unsigned long pgoff) |
| 53 | { |
| 54 | int error = -EBADF; |
| 55 | struct file * file = NULL; |
| 56 | |
| 57 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 58 | if (!(flags & MAP_ANONYMOUS)) { |
| 59 | file = fget(fd); |
| 60 | if (!file) |
| 61 | goto out; |
| 62 | } |
| 63 | |
| 64 | down_write(¤t->mm->mmap_sem); |
| 65 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 66 | up_write(¤t->mm->mmap_sem); |
| 67 | |
| 68 | if (file) |
| 69 | fput(file); |
| 70 | out: |
| 71 | return error; |
| 72 | } |
| 73 | |
| 74 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
| 75 | unsigned long prot, unsigned long flags, |
| 76 | unsigned long fd, unsigned long pgoff) |
| 77 | { |
| 78 | return do_mmap2(addr, len, prot, flags, fd, pgoff); |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | * Perform the select(nd, in, out, ex, tv) and mmap() system |
| 83 | * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to |
| 84 | * handle more than 4 system call parameters, so these system calls |
| 85 | * used a memory block for parameter passing.. |
| 86 | */ |
| 87 | |
| 88 | struct mmap_arg_struct { |
| 89 | unsigned long addr; |
| 90 | unsigned long len; |
| 91 | unsigned long prot; |
| 92 | unsigned long flags; |
| 93 | unsigned long fd; |
| 94 | unsigned long offset; |
| 95 | }; |
| 96 | |
| 97 | asmlinkage int old_mmap(struct mmap_arg_struct *arg) |
| 98 | { |
| 99 | struct mmap_arg_struct a; |
| 100 | int error = -EFAULT; |
| 101 | |
| 102 | if (copy_from_user(&a, arg, sizeof(a))) |
| 103 | goto out; |
| 104 | |
| 105 | error = -EINVAL; |
| 106 | if (a.offset & ~PAGE_MASK) |
| 107 | goto out; |
| 108 | |
| 109 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 110 | |
| 111 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); |
| 112 | out: |
| 113 | return error; |
| 114 | } |
| 115 | |
| 116 | struct sel_arg_struct { |
| 117 | unsigned long n; |
| 118 | fd_set *inp, *outp, *exp; |
| 119 | struct timeval *tvp; |
| 120 | }; |
| 121 | |
| 122 | asmlinkage int old_select(struct sel_arg_struct *arg) |
| 123 | { |
| 124 | struct sel_arg_struct a; |
| 125 | |
| 126 | if (copy_from_user(&a, arg, sizeof(a))) |
| 127 | return -EFAULT; |
| 128 | /* sys_select() does the appropriate kernel locking */ |
| 129 | return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. |
| 134 | * |
| 135 | * This is really horribly ugly. |
| 136 | */ |
| 137 | asmlinkage int sys_ipc (uint call, int first, int second, |
| 138 | int third, void *ptr, long fifth) |
| 139 | { |
David Wu | 1bddcc5 | 2006-12-04 17:27:22 +1000 | [diff] [blame] | 140 | int version, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | version = call >> 16; /* hack for backward compatibility */ |
| 143 | call &= 0xffff; |
| 144 | |
| 145 | if (call <= SEMCTL) |
| 146 | switch (call) { |
| 147 | case SEMOP: |
| 148 | return sys_semop (first, (struct sembuf *)ptr, second); |
| 149 | case SEMGET: |
| 150 | return sys_semget (first, second, third); |
| 151 | case SEMCTL: { |
| 152 | union semun fourth; |
| 153 | if (!ptr) |
| 154 | return -EINVAL; |
| 155 | if (get_user(fourth.__pad, (void **) ptr)) |
| 156 | return -EFAULT; |
| 157 | return sys_semctl (first, second, third, fourth); |
| 158 | } |
| 159 | default: |
| 160 | return -EINVAL; |
| 161 | } |
| 162 | if (call <= MSGCTL) |
| 163 | switch (call) { |
| 164 | case MSGSND: |
| 165 | return sys_msgsnd (first, (struct msgbuf *) ptr, |
| 166 | second, third); |
| 167 | case MSGRCV: |
| 168 | switch (version) { |
| 169 | case 0: { |
| 170 | struct ipc_kludge tmp; |
| 171 | if (!ptr) |
| 172 | return -EINVAL; |
| 173 | if (copy_from_user (&tmp, |
| 174 | (struct ipc_kludge *)ptr, |
| 175 | sizeof (tmp))) |
| 176 | return -EFAULT; |
| 177 | return sys_msgrcv (first, tmp.msgp, second, |
| 178 | tmp.msgtyp, third); |
| 179 | } |
| 180 | default: |
| 181 | return sys_msgrcv (first, |
| 182 | (struct msgbuf *) ptr, |
| 183 | second, fifth, third); |
| 184 | } |
| 185 | case MSGGET: |
| 186 | return sys_msgget ((key_t) first, second); |
| 187 | case MSGCTL: |
| 188 | return sys_msgctl (first, second, |
| 189 | (struct msqid_ds *) ptr); |
| 190 | default: |
| 191 | return -EINVAL; |
| 192 | } |
David Wu | 1bddcc5 | 2006-12-04 17:27:22 +1000 | [diff] [blame] | 193 | if (call <= SHMCTL) |
| 194 | switch (call) { |
| 195 | case SHMAT: |
| 196 | switch (version) { |
| 197 | default: { |
| 198 | ulong raddr; |
| 199 | ret = do_shmat (first, ptr, second, &raddr); |
| 200 | if (ret) |
| 201 | return ret; |
| 202 | return put_user (raddr, (ulong __user *) third); |
| 203 | } |
| 204 | } |
| 205 | case SHMDT: |
| 206 | return sys_shmdt (ptr); |
| 207 | case SHMGET: |
| 208 | return sys_shmget (first, second, third); |
| 209 | case SHMCTL: |
| 210 | return sys_shmctl (first, second, ptr); |
| 211 | default: |
| 212 | return -ENOSYS; |
| 213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | return -EINVAL; |
| 216 | } |
| 217 | |
| 218 | /* sys_cacheflush -- flush (part of) the processor cache. */ |
| 219 | asmlinkage int |
| 220 | sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) |
| 221 | { |
| 222 | flush_cache_all(); |
| 223 | return(0); |
| 224 | } |
| 225 | |
| 226 | asmlinkage int sys_getpagesize(void) |
| 227 | { |
| 228 | return PAGE_SIZE; |
| 229 | } |
| 230 | |
Arnd Bergmann | fe74290 | 2006-10-02 02:18:34 -0700 | [diff] [blame] | 231 | /* |
| 232 | * Do a system call from kernel instead of calling sys_execve so we |
| 233 | * end up with proper pt_regs. |
| 234 | */ |
| 235 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
| 236 | { |
| 237 | register long __res asm ("%d0") = __NR_execve; |
| 238 | register long __a asm ("%d1") = (long)(filename); |
| 239 | register long __b asm ("%d2") = (long)(argv); |
| 240 | register long __c asm ("%d3") = (long)(envp); |
| 241 | asm volatile ("trap #0" : "+d" (__res) |
| 242 | : "d" (__a), "d" (__b), "d" (__c)); |
| 243 | return __res; |
| 244 | } |