2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
6 #include "linux/sched.h"
10 #include "asm/uaccess.h"
11 #include "asm/unistd.h"
14 * Perform the select(nd, in, out, ex, tv) and mmap() system
15 * calls. Linux/i386 didn't use to be able to handle more than
16 * 4 system call parameters, so these system calls used a memory
17 * block for parameter passing..
20 struct mmap_arg_struct {
29 extern int old_mmap(unsigned long addr, unsigned long len,
30 unsigned long prot, unsigned long flags,
31 unsigned long fd, unsigned long offset);
33 long old_mmap_i386(struct mmap_arg_struct __user *arg)
35 struct mmap_arg_struct a;
38 if (copy_from_user(&a, arg, sizeof(a)))
41 err = old_mmap(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
46 struct sel_arg_struct {
51 struct timeval __user *tvp;
54 long old_select(struct sel_arg_struct __user *arg)
56 struct sel_arg_struct a;
58 if (copy_from_user(&a, arg, sizeof(a)))
60 /* sys_select() does the appropriate kernel locking */
61 return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
64 /* The i386 version skips reading from %esi, the fourth argument. So we must do
67 long sys_clone(unsigned long clone_flags, unsigned long newsp,
68 int __user *parent_tid, int unused, int __user *child_tid)
72 /* XXX: normal arch do here this pass, and also pass the regs to
73 * do_fork, instead of NULL. Currently the arch-independent code
74 * ignores these values, while the UML code (actually it's
75 * copy_thread) does the right thing. But this should change,
78 newsp = UPT_SP(current->thread.regs);*/
79 current->thread.forking = 1;
80 ret = do_fork(clone_flags, newsp, NULL, 0, parent_tid, child_tid);
81 current->thread.forking = 0;
86 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
88 * This is really horribly ugly.
90 long sys_ipc (uint call, int first, int second,
91 int third, void __user *ptr, long fifth)
95 version = call >> 16; /* hack for backward compatibility */
100 return sys_semtimedop(first, (struct sembuf *) ptr, second,
103 return sys_semtimedop(first, (struct sembuf *) ptr, second,
104 (const struct timespec *) fifth);
106 return sys_semget (first, second, third);
111 if (get_user(fourth.__pad, (void **) ptr))
113 return sys_semctl (first, second, third, fourth);
117 return sys_msgsnd (first, (struct msgbuf *) ptr,
122 struct ipc_kludge tmp;
126 if (copy_from_user(&tmp,
127 (struct ipc_kludge *) ptr,
130 return sys_msgrcv (first, tmp.msgp, second,
134 panic("msgrcv with version != 0");
135 return sys_msgrcv (first,
136 (struct msgbuf *) ptr,
137 second, fifth, third);
140 return sys_msgget ((key_t) first, second);
142 return sys_msgctl (first, second, (struct msqid_ds *) ptr);
148 ret = do_shmat (first, (char *) ptr, second, &raddr);
151 return put_user (raddr, (ulong *) third);
153 case 1: /* iBCS2 emulator entry point */
154 if (!segment_eq(get_fs(), get_ds()))
156 return do_shmat (first, (char *) ptr, second, (ulong *) third);
159 return sys_shmdt ((char *)ptr);
161 return sys_shmget (first, second, third);
163 return sys_shmctl (first, second,
164 (struct shmid_ds *) ptr);
170 long sys_sigaction(int sig, const struct old_sigaction __user *act,
171 struct old_sigaction __user *oact)
173 struct k_sigaction new_ka, old_ka;
178 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
179 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
180 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
182 __get_user(new_ka.sa.sa_flags, &act->sa_flags);
183 __get_user(mask, &act->sa_mask);
184 siginitset(&new_ka.sa.sa_mask, mask);
187 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
190 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
191 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
192 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
194 __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
195 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
202 * Overrides for Emacs so that we follow Linus's tabbing style.
203 * Emacs will notice this stuff at the end of the file and automatically
204 * adjust the settings for this buffer only. This must remain at the end
206 * ---------------------------------------------------------------------------
208 * c-file-style: "linux"