1 /*
2 * Implements HPUX syscalls.
3 *
4 * Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
5 * Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
6 * Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
7 * Copyright (C) 2000 Philipp Rumpf
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/mm.h>
26 #include <linux/fs.h>
27 #include <linux/sched.h>
28 #include <linux/file.h>
29 #include <linux/slab.h>
30 #include <linux/ptrace.h>
31 #include <asm/errno.h>
32 #include <asm/uaccess.h>
33
hpux_execve(struct pt_regs * regs)34 int hpux_execve(struct pt_regs *regs)
35 {
36 int error;
37 char *filename;
38
39 filename = getname((char __user *) regs->gr[26]);
40 error = PTR_ERR(filename);
41 if (IS_ERR(filename))
42 goto out;
43
44 error = do_execve(filename, (char __user * __user *) regs->gr[25],
45 (char __user * __user *) regs->gr[24], regs);
46
47 if (error == 0) {
48 task_lock(current);
49 current->ptrace &= ~PT_DTRACE;
50 task_unlock(current);
51 }
52 putname(filename);
53
54 out:
55 return error;
56 }
57
58 struct hpux_dirent {
59 loff_t d_off;
60 ino_t d_ino;
61 short d_reclen;
62 short d_namlen;
63 char d_name[1];
64 };
65
66 struct getdents_callback {
67 struct hpux_dirent __user *current_dir;
68 struct hpux_dirent __user *previous;
69 int count;
70 int error;
71 };
72
73 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
74
filldir(void * __buf,const char * name,int namlen,loff_t offset,u64 ino,unsigned d_type)75 static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
76 u64 ino, unsigned d_type)
77 {
78 struct hpux_dirent __user * dirent;
79 struct getdents_callback * buf = (struct getdents_callback *) __buf;
80 ino_t d_ino;
81 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));
82
83 buf->error = -EINVAL; /* only used if we fail.. */
84 if (reclen > buf->count)
85 return -EINVAL;
86 d_ino = ino;
87 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
88 buf->error = -EOVERFLOW;
89 return -EOVERFLOW;
90 }
91 dirent = buf->previous;
92 if (dirent)
93 if (put_user(offset, &dirent->d_off))
94 goto Efault;
95 dirent = buf->current_dir;
96 if (put_user(d_ino, &dirent->d_ino) ||
97 put_user(reclen, &dirent->d_reclen) ||
98 put_user(namlen, &dirent->d_namlen) ||
99 copy_to_user(dirent->d_name, name, namlen) ||
100 put_user(0, dirent->d_name + namlen))
101 goto Efault;
102 buf->previous = dirent;
103 buf->current_dir = (void __user *)dirent + reclen;
104 buf->count -= reclen;
105 return 0;
106 Efault:
107 buf->error = -EFAULT;
108 return -EFAULT;
109 }
110
111 #undef NAME_OFFSET
112
hpux_getdents(unsigned int fd,struct hpux_dirent __user * dirent,unsigned int count)113 int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
114 {
115 struct file * file;
116 struct hpux_dirent __user * lastdirent;
117 struct getdents_callback buf;
118 int error = -EBADF;
119
120 file = fget(fd);
121 if (!file)
122 goto out;
123
124 buf.current_dir = dirent;
125 buf.previous = NULL;
126 buf.count = count;
127 buf.error = 0;
128
129 error = vfs_readdir(file, filldir, &buf);
130 if (error >= 0)
131 error = buf.error;
132 lastdirent = buf.previous;
133 if (lastdirent) {
134 if (put_user(file->f_pos, &lastdirent->d_off))
135 error = -EFAULT;
136 else
137 error = count - buf.count;
138 }
139
140 fput(file);
141 out:
142 return error;
143 }
144
hpux_mount(const char * fs,const char * path,int mflag,const char * fstype,const char * dataptr,int datalen)145 int hpux_mount(const char *fs, const char *path, int mflag,
146 const char *fstype, const char *dataptr, int datalen)
147 {
148 return -ENOSYS;
149 }
150
cp_hpux_stat(struct kstat * stat,struct hpux_stat64 __user * statbuf)151 static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
152 {
153 struct hpux_stat64 tmp;
154
155 /* we probably want a different split here - is hpux 12:20? */
156
157 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
158 return -EOVERFLOW;
159
160 memset(&tmp, 0, sizeof(tmp));
161 tmp.st_dev = new_encode_dev(stat->dev);
162 tmp.st_ino = stat->ino;
163 tmp.st_mode = stat->mode;
164 tmp.st_nlink = stat->nlink;
165 tmp.st_uid = stat->uid;
166 tmp.st_gid = stat->gid;
167 tmp.st_rdev = new_encode_dev(stat->rdev);
168 tmp.st_size = stat->size;
169 tmp.st_atime = stat->atime.tv_sec;
170 tmp.st_mtime = stat->mtime.tv_sec;
171 tmp.st_ctime = stat->ctime.tv_sec;
172 tmp.st_blocks = stat->blocks;
173 tmp.st_blksize = stat->blksize;
174 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
175 }
176
hpux_stat64(char __user * filename,struct hpux_stat64 __user * statbuf)177 long hpux_stat64(char __user *filename, struct hpux_stat64 __user *statbuf)
178 {
179 struct kstat stat;
180 int error = vfs_stat(filename, &stat);
181
182 if (!error)
183 error = cp_hpux_stat(&stat, statbuf);
184
185 return error;
186 }
187
hpux_fstat64(unsigned int fd,struct hpux_stat64 __user * statbuf)188 long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
189 {
190 struct kstat stat;
191 int error = vfs_fstat(fd, &stat);
192
193 if (!error)
194 error = cp_hpux_stat(&stat, statbuf);
195
196 return error;
197 }
198
hpux_lstat64(char __user * filename,struct hpux_stat64 __user * statbuf)199 long hpux_lstat64(char __user *filename, struct hpux_stat64 __user *statbuf)
200 {
201 struct kstat stat;
202 int error = vfs_lstat(filename, &stat);
203
204 if (!error)
205 error = cp_hpux_stat(&stat, statbuf);
206
207 return error;
208 }
209