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>
29 /* #define DEBUG_UNIMP_SYSCALL */
31 /* XXX Make this per-binary type, this way we can detect the type of
32 * XXX a binary. Every Sparc executable calls this very early on.
34 asmlinkage unsigned long sys_getpagesize(void)
36 return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */
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_unmapped_area_info info;
43 if (flags & MAP_FIXED) {
44 /* We do not accept a shared mapping if it would violate
45 * cache aliasing constraints.
47 if ((flags & MAP_SHARED) &&
48 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
53 /* See asm-sparc/uaccess.h */
54 if (len > TASK_SIZE - PAGE_SIZE)
57 addr = TASK_UNMAPPED_BASE;
61 info.low_limit = addr;
62 info.high_limit = TASK_SIZE;
63 info.align_mask = (flags & MAP_SHARED) ?
64 (PAGE_MASK & (SHMLBA - 1)) : 0;
65 info.align_offset = pgoff << PAGE_SHIFT;
66 return vm_unmapped_area(&info);
70 * sys_pipe() is the normal C calling standard for creating
71 * a pipe. It's not the way unix traditionally does this, though.
73 asmlinkage long sparc_pipe(struct pt_regs *regs)
78 error = do_pipe_flags(fd, 0);
81 regs->u_regs[UREG_I1] = fd[1];
87 int sparc_mmap_check(unsigned long addr, unsigned long len)
89 /* See asm-sparc/uaccess.h */
90 if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
96 /* Linux version of mmap */
98 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
99 unsigned long prot, unsigned long flags, unsigned long fd,
102 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
104 return sys_mmap_pgoff(addr, len, prot, flags, fd,
105 pgoff >> (PAGE_SHIFT - 12));
108 asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
109 unsigned long prot, unsigned long flags, unsigned long fd,
112 /* no alignment check? */
113 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
116 long sparc_remap_file_pages(unsigned long start, unsigned long size,
117 unsigned long prot, unsigned long pgoff,
120 /* This works on an existing mmap so we don't need to validate
121 * the range as that was done at the original mmap call.
123 return sys_remap_file_pages(start, size, prot,
124 (pgoff >> (PAGE_SHIFT - 12)), flags);
127 /* we come to here via sys_nis_syscall so it can setup the regs argument */
128 asmlinkage unsigned long
129 c_sys_nis_syscall (struct pt_regs *regs)
131 static int count = 0;
135 printk ("%s[%d]: Unimplemented SPARC system call %d\n",
136 current->comm, task_pid_nr(current), (int)regs->u_regs[1]);
137 #ifdef DEBUG_UNIMP_SYSCALL
143 /* #define DEBUG_SPARC_BREAKPOINT */
146 sparc_breakpoint (struct pt_regs *regs)
150 #ifdef DEBUG_SPARC_BREAKPOINT
151 printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
153 info.si_signo = SIGTRAP;
155 info.si_code = TRAP_BRKPT;
156 info.si_addr = (void __user *)regs->pc;
158 force_sig_info(SIGTRAP, &info, current);
160 #ifdef DEBUG_SPARC_BREAKPOINT
161 printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);
165 SYSCALL_DEFINE3(sparc_sigaction, int, sig,
166 struct old_sigaction __user *,act,
167 struct old_sigaction __user *,oact)
169 WARN_ON_ONCE(sig >= 0);
170 return sys_sigaction(-sig, act, oact);
173 SYSCALL_DEFINE5(rt_sigaction, int, sig,
174 const struct sigaction __user *, act,
175 struct sigaction __user *, oact,
176 void __user *, restorer,
179 struct k_sigaction new_ka, old_ka;
182 /* XXX: Don't preclude handling different sized sigset_t's. */
183 if (sigsetsize != sizeof(sigset_t))
187 new_ka.ka_restorer = restorer;
188 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
192 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
195 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
202 asmlinkage long sys_getdomainname(char __user *name, int len)
211 nlen = strlen(utsname()->domainname) + 1;
217 if (!copy_to_user(name, utsname()->domainname, nlen))