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/arch/parisc/kernel/sys_parisc32.c

https://github.com/aicjofs/android_kernel_lge_v500_20d
C | 238 lines | 177 code | 41 blank | 20 comment | 19 complexity | 85add099ccfc9fe7598169dd2cb7924d MD5 | raw file
  1/*
  2 * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
  3 *
  4 * Copyright (C) 2000-2001 Hewlett Packard Company
  5 * Copyright (C) 2000 John Marvin
  6 * Copyright (C) 2001 Matthew Wilcox
  7 *
  8 * These routines maintain argument size conversion between 32bit and 64bit
  9 * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
 10 */
 11
 12#include <linux/compat.h>
 13#include <linux/kernel.h>
 14#include <linux/sched.h>
 15#include <linux/fs.h> 
 16#include <linux/mm.h> 
 17#include <linux/file.h> 
 18#include <linux/signal.h>
 19#include <linux/resource.h>
 20#include <linux/times.h>
 21#include <linux/time.h>
 22#include <linux/smp.h>
 23#include <linux/sem.h>
 24#include <linux/msg.h>
 25#include <linux/shm.h>
 26#include <linux/slab.h>
 27#include <linux/uio.h>
 28#include <linux/ncp_fs.h>
 29#include <linux/poll.h>
 30#include <linux/personality.h>
 31#include <linux/stat.h>
 32#include <linux/highmem.h>
 33#include <linux/highuid.h>
 34#include <linux/mman.h>
 35#include <linux/binfmts.h>
 36#include <linux/namei.h>
 37#include <linux/vfs.h>
 38#include <linux/ptrace.h>
 39#include <linux/swap.h>
 40#include <linux/syscalls.h>
 41
 42#include <asm/types.h>
 43#include <asm/uaccess.h>
 44#include <asm/mmu_context.h>
 45
 46#include "sys32.h"
 47
 48#undef DEBUG
 49
 50#ifdef DEBUG
 51#define DBG(x)	printk x
 52#else
 53#define DBG(x)
 54#endif
 55
 56/*
 57 * sys32_execve() executes a new program.
 58 */
 59
 60asmlinkage int sys32_execve(struct pt_regs *regs)
 61{
 62	int error;
 63	char *filename;
 64
 65	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
 66	filename = getname((const char __user *) regs->gr[26]);
 67	error = PTR_ERR(filename);
 68	if (IS_ERR(filename))
 69		goto out;
 70	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
 71				 compat_ptr(regs->gr[24]), regs);
 72	putname(filename);
 73out:
 74
 75	return error;
 76}
 77
 78asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
 79	int r22, int r21, int r20)
 80{
 81    printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 
 82    	current->comm, current->pid, r20);
 83    return -ENOSYS;
 84}
 85
 86asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
 87	struct compat_timespec __user *interval)
 88{
 89	struct timespec t;
 90	int ret;
 91
 92	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
 93	if (put_compat_timespec(&t, interval))
 94		return -EFAULT;
 95	return ret;
 96}
 97
 98struct msgbuf32 {
 99    int mtype;
100    char mtext[1];
101};
102
103asmlinkage long sys32_msgsnd(int msqid,
104				struct msgbuf32 __user *umsgp32,
105				size_t msgsz, int msgflg)
106{
107	struct msgbuf *mb;
108	struct msgbuf32 mb32;
109	int err;
110
111	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
112		return -ENOMEM;
113
114	err = get_user(mb32.mtype, &umsgp32->mtype);
115	mb->mtype = mb32.mtype;
116	err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
117
118	if (err)
119		err = -EFAULT;
120	else
121		KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
122
123	kfree(mb);
124	return err;
125}
126
127asmlinkage long sys32_msgrcv(int msqid,
128				struct msgbuf32 __user *umsgp32,
129				size_t msgsz, long msgtyp, int msgflg)
130{
131	struct msgbuf *mb;
132	struct msgbuf32 mb32;
133	int err, len;
134
135	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
136		return -ENOMEM;
137
138	KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
139
140	if (err >= 0) {
141		len = err;
142		mb32.mtype = mb->mtype;
143		err = put_user(mb32.mtype, &umsgp32->mtype);
144		err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
145		if (err)
146			err = -EFAULT;
147		else
148			err = len;
149	}
150
151	kfree(mb);
152	return err;
153}
154
155asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
156{
157        mm_segment_t old_fs = get_fs();
158        int ret;
159        off_t of;
160
161        if (offset && get_user(of, offset))
162                return -EFAULT;
163
164        set_fs(KERNEL_DS);
165        ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
166        set_fs(old_fs);
167
168        if (offset && put_user(of, offset))
169                return -EFAULT;
170
171        return ret;
172}
173
174asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
175{
176	mm_segment_t old_fs = get_fs();
177	int ret;
178	loff_t lof;
179	
180	if (offset && get_user(lof, offset))
181		return -EFAULT;
182		
183	set_fs(KERNEL_DS);
184	ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
185	set_fs(old_fs);
186	
187	if (offset && put_user(lof, offset))
188		return -EFAULT;
189		
190	return ret;
191}
192
193
194/* lseek() needs a wrapper because 'offset' can be negative, but the top
195 * half of the argument has been zeroed by syscall.S.
196 */
197
198asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
199{
200	return sys_lseek(fd, offset, origin);
201}
202
203asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
204{
205        union semun u;
206	
207        if (cmd == SETVAL) {
208                /* Ugh.  arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
209                 * The int should be in the first 4, but our argument
210                 * frobbing has left it in the last 4.
211                 */
212                u.val = *((int *)&arg + 1);
213                return sys_semctl (semid, semnum, cmd, u);
214	}
215	return sys_semctl (semid, semnum, cmd, arg);
216}
217
218long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
219			  size_t len)
220{
221	return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
222				  buf, len);
223}
224
225asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
226				u32 lenhi, u32 lenlo)
227{
228        return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
229                             ((loff_t)lenhi << 32) | lenlo);
230}
231
232asmlinkage long compat_sys_fanotify_mark(int fan_fd, int flags, u32 mask_hi,
233					 u32 mask_lo, int fd,
234					 const char __user *pathname)
235{
236	return sys_fanotify_mark(fan_fd, flags, ((u64)mask_hi << 32) | mask_lo,
237				 fd, pathname);
238}