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 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
39 struct vm_unmapped_area_info info;
41 if (flags & MAP_FIXED) {
42 /* We do not accept a shared mapping if it would violate
43 * cache aliasing constraints.
45 if ((flags & MAP_SHARED) &&
46 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
51 /* See asm-sparc/uaccess.h */
52 if (len > TASK_SIZE - PAGE_SIZE)
55 addr = TASK_UNMAPPED_BASE;
59 info.low_limit = addr;
60 info.high_limit = TASK_SIZE;
61 info.align_mask = (flags & MAP_SHARED) ?
62 (PAGE_MASK & (SHMLBA - 1)) : 0;
63 info.align_offset = pgoff << PAGE_SHIFT;
64 return vm_unmapped_area(&info);
68 * sys_pipe() is the normal C calling standard for creating
69 * a pipe. It's not the way unix traditionally does this, though.
71 asmlinkage int sparc_pipe(struct pt_regs *regs)
76 error = do_pipe_flags(fd, 0);
79 regs->u_regs[UREG_I1] = fd[1];
85 int sparc_mmap_check(unsigned long addr, unsigned long len)
87 /* See asm-sparc/uaccess.h */
88 if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
94 /* Linux version of mmap */
96 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
97 unsigned long prot, unsigned long flags, unsigned long fd,
100 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
102 return sys_mmap_pgoff(addr, len, prot, flags, fd,
103 pgoff >> (PAGE_SHIFT - 12));
106 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
107 unsigned long prot, unsigned long flags, unsigned long fd,
110 /* no alignment check? */
111 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
114 long sparc_remap_file_pages(unsigned long start, unsigned long size,
115 unsigned long prot, unsigned long pgoff,
118 /* This works on an existing mmap so we don't need to validate
119 * the range as that was done at the original mmap call.
121 return sys_remap_file_pages(start, size, prot,
122 (pgoff >> (PAGE_SHIFT - 12)), flags);
125 /* we come to here via sys_nis_syscall so it can setup the regs argument */
126 asmlinkage unsigned long
127 c_sys_nis_syscall (struct pt_regs *regs)
129 static int count = 0;
133 printk ("%s[%d]: Unimplemented SPARC system call %d\n",
134 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
135 #ifdef DEBUG_UNIMP_SYSCALL
141 /* #define DEBUG_SPARC_BREAKPOINT */
144 sparc_breakpoint (struct pt_regs *regs)
148 #ifdef DEBUG_SPARC_BREAKPOINT
149 printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
151 info.si_signo = SIGTRAP;
153 info.si_code = TRAP_BRKPT;
154 info.si_addr = (void __user *)regs->pc;
156 force_sig_info(SIGTRAP, &info, current);
158 #ifdef DEBUG_SPARC_BREAKPOINT
159 printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
163 SYSCALL_DEFINE3(sparc_sigaction, int, sig,
164 struct old_sigaction __user *,act,
165 struct old_sigaction __user *,oact)
167 WARN_ON_ONCE(sig >= 0);
168 return sys_sigaction(-sig, act, oact);
171 SYSCALL_DEFINE5(rt_sigaction, int, sig,
172 const struct sigaction __user *, act,
173 struct sigaction __user *, oact,
174 void __user *, restorer,
177 struct k_sigaction new_ka, old_ka;
180 /* XXX: Don't preclude handling different sized sigset_t's. */
181 if (sigsetsize != sizeof(sigset_t))
185 new_ka.ka_restorer = restorer;
186 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
190 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
193 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
200 asmlinkage int sys_getdomainname(char __user *name, int len)
209 nlen = strlen(utsname()->domainname) + 1;
215 if (!copy_to_user(name, utsname()->domainname, nlen))