| /* |
| * 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/capability.h> |
| #include <linux/errno.h> |
| #include <linux/linkage.h> |
| #include <linux/mm.h> |
| #include <linux/fs.h> |
| #include <linux/smp.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 <linux/module.h> |
| |
| #include <asm/branch.h> |
| #include <asm/cachectl.h> |
| #include <asm/cacheflush.h> |
| #include <asm/ipc.h> |
| #include <asm/asm-offsets.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 */ |
| |
| EXPORT_SYMBOL(shm_align_mask); |
| |
| #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) |
| { |
| if (pgoff & (~PAGE_MASK >> 12)) |
| return -EINVAL; |
| |
| return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); |
| } |
| |
| save_static_function(sys_fork); |
| static int __used noinline |
| _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); |
| static int __used noinline |
| _sys_clone(nabi_no_regargs struct pt_regs regs) |
| { |
| unsigned long clone_flags; |
| unsigned long newsp; |
| int __user *parent_tidptr, *child_tidptr; |
| |
| clone_flags = regs.regs[4]; |
| newsp = regs.regs[5]; |
| if (!newsp) |
| newsp = regs.regs[29]; |
| parent_tidptr = (int __user *) regs.regs[6]; |
| #ifdef CONFIG_32BIT |
| /* We need to fetch the fifth argument off the stack. */ |
| child_tidptr = NULL; |
| if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) { |
| int __user *__user *usp = (int __user *__user *) regs.regs[29]; |
| if (regs.regs[2] == __NR_syscall) { |
| if (get_user (child_tidptr, &usp[5])) |
| return -EFAULT; |
| } |
| else if (get_user (child_tidptr, &usp[4])) |
| return -EFAULT; |
| } |
| #else |
| child_tidptr = (int __user *) regs.regs[8]; |
| #endif |
| 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 __user *) (long)regs.regs[4]); |
| error = PTR_ERR(filename); |
| if (IS_ERR(filename)) |
| goto out; |
| error = do_execve(filename, (char __user *__user *) (long)regs.regs[5], |
| (char __user *__user *) (long)regs.regs[6], ®s); |
| putname(filename); |
| |
| out: |
| return error; |
| } |
| |
| /* |
| * Compacrapability ... |
| */ |
| asmlinkage int sys_uname(struct old_utsname __user * name) |
| { |
| if (name && !copy_to_user(name, utsname(), sizeof (*name))) |
| return 0; |
| return -EFAULT; |
| } |
| |
| /* |
| * Compacrapability ... |
| */ |
| asmlinkage int sys_olduname(struct oldold_utsname __user * 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, &utsname()->sysname, |
| __OLD_UTS_LEN); |
| error -= __put_user(0, name->sysname + __OLD_UTS_LEN); |
| error -= __copy_to_user(&name->nodename, &utsname()->nodename, |
| __OLD_UTS_LEN); |
| error -= __put_user(0, name->nodename + __OLD_UTS_LEN); |
| error -= __copy_to_user(&name->release, &utsname()->release, |
| __OLD_UTS_LEN); |
| error -= __put_user(0, name->release + __OLD_UTS_LEN); |
| error -= __copy_to_user(&name->version, &utsname()->version, |
| __OLD_UTS_LEN); |
| error -= __put_user(0, name->version + __OLD_UTS_LEN); |
| error -= __copy_to_user(&name->machine, &utsname()->machine, |
| __OLD_UTS_LEN); |
| error = __put_user(0, name->machine + __OLD_UTS_LEN); |
| error = error ? -EFAULT : 0; |
| |
| return error; |
| } |
| |
| asmlinkage int sys_set_thread_area(unsigned long addr) |
| { |
| struct thread_info *ti = task_thread_info(current); |
| |
| ti->tp_value = addr; |
| if (cpu_has_userlocal) |
| write_c0_userlocal(addr); |
| |
| return 0; |
| } |
| |
| asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) |
| { |
| switch (cmd) { |
| case MIPS_ATOMIC_SET: |
| printk(KERN_CRIT "How did I get here?\n"); |
| return -EINVAL; |
| |
| case MIPS_FIXADE: |
| if (arg1 & ~3) |
| return -EINVAL; |
| |
| if (arg1 & 1) |
| set_thread_flag(TIF_FIXADE); |
| else |
| clear_thread_flag(TIF_FIXADE); |
| if (arg1 & 2) |
| set_thread_flag(TIF_LOGADE); |
| else |
| clear_thread_flag(TIF_FIXADE); |
| |
| return 0; |
| |
| case FLUSH_CACHE: |
| __flush_cache_all(); |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| /* |
| * sys_ipc() is the de-multiplexer for the SysV IPC calls.. |
| * |
| * This is really horribly ugly. |
| */ |
| asmlinkage int sys_ipc(unsigned int call, int first, int second, |
| unsigned long third, void __user *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 __user *)ptr, |
| second, NULL); |
| case SEMTIMEDOP: |
| return sys_semtimedop(first, (struct sembuf __user *)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 __user *__user *) ptr)) |
| return -EFAULT; |
| return sys_semctl(first, second, third, fourth); |
| } |
| |
| case MSGSND: |
| return sys_msgsnd(first, (struct msgbuf __user *) 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 __user *) ptr, |
| sizeof(tmp))) |
| return -EFAULT; |
| return sys_msgrcv(first, tmp.msgp, second, |
| tmp.msgtyp, third); |
| } |
| default: |
| return sys_msgrcv(first, |
| (struct msgbuf __user *) ptr, |
| second, fifth, third); |
| } |
| case MSGGET: |
| return sys_msgget((key_t) first, second); |
| case MSGCTL: |
| return sys_msgctl(first, second, |
| (struct msqid_ds __user *) ptr); |
| |
| case SHMAT: |
| switch (version) { |
| default: { |
| unsigned long raddr; |
| ret = do_shmat(first, (char __user *) ptr, second, |
| &raddr); |
| if (ret) |
| return ret; |
| return put_user(raddr, (unsigned long __user *) third); |
| } |
| case 1: /* iBCS2 emulator entry point */ |
| if (!segment_eq(get_fs(), get_ds())) |
| return -EINVAL; |
| return do_shmat(first, (char __user *) ptr, second, |
| (unsigned long *) third); |
| } |
| case SHMDT: |
| return sys_shmdt((char __user *)ptr); |
| case SHMGET: |
| return sys_shmget(first, second, third); |
| case SHMCTL: |
| return sys_shmctl(first, second, |
| (struct shmid_ds __user *) 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); |
| } |
| |
| /* |
| * Do a system call from kernel instead of calling sys_execve so we |
| * end up with proper pt_regs. |
| */ |
| int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
| { |
| register unsigned long __a0 asm("$4") = (unsigned long) filename; |
| register unsigned long __a1 asm("$5") = (unsigned long) argv; |
| register unsigned long __a2 asm("$6") = (unsigned long) envp; |
| register unsigned long __a3 asm("$7"); |
| unsigned long __v0; |
| |
| __asm__ volatile (" \n" |
| " .set noreorder \n" |
| " li $2, %5 # __NR_execve \n" |
| " syscall \n" |
| " move %0, $2 \n" |
| " .set reorder \n" |
| : "=&r" (__v0), "=r" (__a3) |
| : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve) |
| : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", |
| "memory"); |
| |
| if (__a3 == 0) |
| return __v0; |
| |
| return -__v0; |
| } |