/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. * Copyright (C) 2001 MIPS Technologies, Inc. */ #include <linux/a.out.h> #include <linux/errno.h> #include <linux/linkage.h> #include <linux/mm.h> #include <linux/smp.h> #include <linux/smp_lock.h> #include <linux/mman.h> #include <linux/ptrace.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/syscalls.h> #include <linux/file.h> #include <linux/slab.h> #include <linux/utsname.h> #include <linux/unistd.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/shm.h> #include <linux/compiler.h> #include <asm/branch.h> #include <asm/cachectl.h> #include <asm/cacheflush.h> #include <asm/ipc.h> #include <asm/offset.h> #include <asm/signal.h> #include <asm/sim.h> #include <asm/shmparam.h> #include <asm/sysmips.h> #include <asm/uaccess.h> asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs) { int fd[2]; int error, res; error = do_pipe(fd); if (error) { res = error; goto out; } regs.regs[3] = fd[1]; res = fd[0]; out: return res; } unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */ #define COLOUR_ALIGN(addr,pgoff) \ ((((addr) + shm_align_mask) & ~shm_align_mask) + \ (((pgoff) << PAGE_SHIFT) & shm_align_mask)) unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct vm_area_struct * vmm; int do_color_align; unsigned long task_size; task_size = STACK_TOP; if (flags & MAP_FIXED) { /* * We do not accept a shared mapping if it would violate * cache aliasing constraints. */ if ((flags & MAP_SHARED) && (addr & shm_align_mask)) return -EINVAL; return addr; } if (len > task_size) return -ENOMEM; do_color_align = 0; if (filp || (flags & MAP_SHARED)) do_color_align = 1; if (addr) { if (do_color_align) addr = COLOUR_ALIGN(addr, pgoff); else addr = PAGE_ALIGN(addr); vmm = find_vma(current->mm, addr); if (task_size - len >= addr && (!vmm || addr + len <= vmm->vm_start)) return addr; } addr = TASK_UNMAPPED_BASE; if (do_color_align) addr = COLOUR_ALIGN(addr, pgoff); else addr = PAGE_ALIGN(addr); for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { /* At this point: (!vmm || addr < vmm->vm_end). */ if (task_size - len < addr) return -ENOMEM; if (!vmm || addr + len <= vmm->vm_start) return addr; addr = vmm->vm_end; if (do_color_align) addr = COLOUR_ALIGN(addr, pgoff); } } /* common code for old and new mmaps */ static inline unsigned long do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { unsigned long error = -EBADF; struct file * file = NULL; flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); if (!(flags & MAP_ANONYMOUS)) { file = fget(fd); if (!file) goto out; } down_write(¤t->mm->mmap_sem); error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); up_write(¤t->mm->mmap_sem); if (file) fput(file); out: return error; } asmlinkage unsigned long old_mmap(unsigned long addr, unsigned long len, int prot, int flags, int fd, off_t offset) { unsigned long result; result = -EINVAL; if (offset & ~PAGE_MASK) goto out; result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); out: return result; } asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { return do_mmap2(addr, len, prot, flags, fd, pgoff); } save_static_function(sys_fork); __attribute_used__ noinline static int _sys_fork(nabi_no_regargs struct pt_regs regs) { return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL); } save_static_function(sys_clone); __attribute_used__ noinline static int _sys_clone(nabi_no_regargs struct pt_regs regs) { unsigned long clone_flags; unsigned long newsp; int *parent_tidptr, *child_tidptr; clone_flags = regs.regs[4]; newsp = regs.regs[5]; if (!newsp) newsp = regs.regs[29]; parent_tidptr = (int *) regs.regs[6]; child_tidptr = (int *) regs.regs[7]; return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr); } /* * sys_execve() executes a new program. */ asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs) { int error; char * filename; filename = getname((char *) (long)regs.regs[4]); error = PTR_ERR(filename); if (IS_ERR(filename)) goto out; error = do_execve(filename, (char **) (long)regs.regs[5], (char **) (long)regs.regs[6], ®s); putname(filename); out: return error; } /* * Compacrapability ... */ asmlinkage int sys_uname(struct old_utsname * name) { if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) return 0; return -EFAULT; } /* * Compacrapability ... */ asmlinkage int sys_olduname(struct oldold_utsname * name) { int error; if (!name) return -EFAULT; if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) return -EFAULT; error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); error -= __put_user(0,name->sysname+__OLD_UTS_LEN); error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); error -= __put_user(0,name->nodename+__OLD_UTS_LEN); error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); error -= __put_user(0,name->release+__OLD_UTS_LEN); error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); error -= __put_user(0,name->version+__OLD_UTS_LEN); error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN); error = __put_user(0,name->machine+__OLD_UTS_LEN); error = error ? -EFAULT : 0; return error; } asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) { int tmp, len; char *name; switch(cmd) { case SETNAME: { char nodename[__NEW_UTS_LEN + 1]; if (!capable(CAP_SYS_ADMIN)) return -EPERM; name = (char *) arg1; len = strncpy_from_user(nodename, name, __NEW_UTS_LEN); if (len < 0) return -EFAULT; down_write(&uts_sem); strncpy(system_utsname.nodename, nodename, len); nodename[__NEW_UTS_LEN] = '\0'; strlcpy(system_utsname.nodename, nodename, sizeof(system_utsname.nodename)); up_write(&uts_sem); return 0; } case MIPS_ATOMIC_SET: printk(KERN_CRIT "How did I get here?\n"); return -EINVAL; case MIPS_FIXADE: tmp = current->thread.mflags & ~3; current->thread.mflags = tmp | (arg1 & 3); return 0; case FLUSH_CACHE: __flush_cache_all(); return 0; case MIPS_RDNVRAM: return -EIO; } return -EINVAL; } /* * sys_ipc() is the de-multiplexer for the SysV IPC calls.. * * This is really horribly ugly. */ asmlinkage int sys_ipc (uint call, int first, int second, unsigned long third, void *ptr, long fifth) { int version, ret; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMOP: return sys_semtimedop (first, (struct sembuf *)ptr, second, NULL); case SEMTIMEDOP: return sys_semtimedop (first, (struct sembuf *)ptr, second, (const struct timespec __user *)fifth); case SEMGET: return sys_semget (first, second, third); case SEMCTL: { union semun fourth; if (!ptr) return -EINVAL; if (get_user(fourth.__pad, (void **) ptr)) return -EFAULT; return sys_semctl (first, second, third, fourth); } case MSGSND: return sys_msgsnd (first, (struct msgbuf *) ptr, second, third); case MSGRCV: switch (version) { case 0: { struct ipc_kludge tmp; if (!ptr) return -EINVAL; if (copy_from_user(&tmp, (struct ipc_kludge *) ptr, sizeof (tmp))) return -EFAULT; return sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third); } default: return sys_msgrcv (first, (struct msgbuf *) ptr, second, fifth, third); } case MSGGET: return sys_msgget ((key_t) first, second); case MSGCTL: return sys_msgctl (first, second, (struct msqid_ds *) ptr); case SHMAT: switch (version) { default: { ulong raddr; ret = do_shmat (first, (char *) ptr, second, &raddr); if (ret) return ret; return put_user (raddr, (ulong *) third); } case 1: /* iBCS2 emulator entry point */ if (!segment_eq(get_fs(), get_ds())) return -EINVAL; return do_shmat (first, (char *) ptr, second, (ulong *) third); } case SHMDT: return sys_shmdt ((char *)ptr); case SHMGET: return sys_shmget (first, second, third); case SHMCTL: return sys_shmctl (first, second, (struct shmid_ds *) ptr); default: return -ENOSYS; } } /* * No implemented yet ... */ asmlinkage int sys_cachectl(char *addr, int nbytes, int op) { return -ENOSYS; } /* * If we ever come here the user sp is bad. Zap the process right away. * Due to the bad stack signaling wouldn't work. */ asmlinkage void bad_stack(void) { do_exit(SIGSEGV); }