1 /* linux/arch/sparc/kernel/sys_sparc.c
3 * This file contains various random system calls that
4 * have a non-standard calling sequence on the Linux/sparc
8 #include <linux/errno.h>
9 #include <linux/types.h>
10 #include <linux/sched.h>
13 #include <linux/file.h>
14 #include <linux/sem.h>
15 #include <linux/msg.h>
16 #include <linux/shm.h>
17 #include <linux/stat.h>
18 #include <linux/syscalls.h>
19 #include <linux/mman.h>
20 #include <linux/utsname.h>
21 #include <linux/smp.h>
22 #include <linux/ipc.h>
24 #include <asm/uaccess.h>
25 #include <asm/unistd.h>
27 /* #define DEBUG_UNIMP_SYSCALL */
29 /* XXX Make this per-binary type, this way we can detect the type of
30 * XXX a binary. Every Sparc executable calls this very early on.
32 asmlinkage unsigned long sys_getpagesize(void)
34 return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
37 #define COLOUR_ALIGN(addr) (((addr)+SHMLBA-1)&~(SHMLBA-1))
39 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
41 struct vm_area_struct * vmm;
42 struct vm_unmapped_area_info info;
44 if (flags & MAP_FIXED) {
45 /* We do not accept a shared mapping if it would violate
46 * cache aliasing constraints.
48 if ((flags & MAP_SHARED) &&
49 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
54 /* See asm-sparc/uaccess.h */
55 if (len > TASK_SIZE - PAGE_SIZE)
58 addr = TASK_UNMAPPED_BASE;
62 info.low_limit = addr;
63 info.high_limit = TASK_SIZE;
64 info.align_mask = (flags & MAP_SHARED) ?
65 (PAGE_MASK & (SHMLBA - 1)) : 0;
66 info.align_offset = pgoff << PAGE_SHIFT;
67 return vm_unmapped_area(&info);
71 * sys_pipe() is the normal C calling standard for creating
72 * a pipe. It's not the way unix traditionally does this, though.
74 asmlinkage int sparc_pipe(struct pt_regs *regs)
79 error = do_pipe_flags(fd, 0);
82 regs->u_regs[UREG_I1] = fd[1];
88 int sparc_mmap_check(unsigned long addr, unsigned long len)
90 /* See asm-sparc/uaccess.h */
91 if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
97 /* Linux version of mmap */
99 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
100 unsigned long prot, unsigned long flags, unsigned long fd,
103 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
105 return sys_mmap_pgoff(addr, len, prot, flags, fd,
106 pgoff >> (PAGE_SHIFT - 12));
109 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
110 unsigned long prot, unsigned long flags, unsigned long fd,
113 /* no alignment check? */
114 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
117 long sparc_remap_file_pages(unsigned long start, unsigned long size,
118 unsigned long prot, unsigned long pgoff,
121 /* This works on an existing mmap so we don't need to validate
122 * the range as that was done at the original mmap call.
124 return sys_remap_file_pages(start, size, prot,
125 (pgoff >> (PAGE_SHIFT - 12)), flags);
128 /* we come to here via sys_nis_syscall so it can setup the regs argument */
129 asmlinkage unsigned long
130 c_sys_nis_syscall (struct pt_regs *regs)
132 static int count = 0;
136 printk ("%s[%d]: Unimplemented SPARC system call %d\n",
137 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
138 #ifdef DEBUG_UNIMP_SYSCALL
144 /* #define DEBUG_SPARC_BREAKPOINT */
147 sparc_breakpoint (struct pt_regs *regs)
151 #ifdef DEBUG_SPARC_BREAKPOINT
152 printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
154 info.si_signo = SIGTRAP;
156 info.si_code = TRAP_BRKPT;
157 info.si_addr = (void __user *)regs->pc;
159 force_sig_info(SIGTRAP, &info, current);
161 #ifdef DEBUG_SPARC_BREAKPOINT
162 printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
167 sparc_sigaction (int sig, const struct old_sigaction __user *act,
168 struct old_sigaction __user *oact)
170 struct k_sigaction new_ka, old_ka;
173 WARN_ON_ONCE(sig >= 0);
179 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
180 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
181 __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))
185 siginitset(&new_ka.sa.sa_mask, mask);
186 new_ka.ka_restorer = NULL;
189 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
192 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
193 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
194 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
195 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
196 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
204 sys_rt_sigaction(int sig,
205 const struct sigaction __user *act,
206 struct sigaction __user *oact,
207 void __user *restorer,
210 struct k_sigaction new_ka, old_ka;
213 /* XXX: Don't preclude handling different sized sigset_t's. */
214 if (sigsetsize != sizeof(sigset_t))
218 new_ka.ka_restorer = restorer;
219 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
223 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
226 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
233 asmlinkage int sys_getdomainname(char __user *name, int len)
242 nlen = strlen(utsname()->domainname) + 1;
248 if (!copy_to_user(name, utsname()->domainname, nlen))