projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fc4fb2ad CZ |
1 | /* |
| 2 | * arch/xtensa/kernel/syscall.c | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
| 9 | * Copyright (C) 2000 Silicon Graphics, Inc. | |
| 10 | * Copyright (C) 1995 - 2000 by Ralf Baechle | |
| 11 | * | |
| 12 | * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> | |
| 13 | * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> | |
| 14 | * Chris Zankel <chris@zankel.net> | |
| 15 | * Kevin Chea | |
| 16 | * | |
| 17 | */ | |
| 18 | #include <asm/uaccess.h> | |
| 1c0350bd | 19 | #include <asm/syscall.h> |
| fc4fb2ad CZ |
20 | #include <asm/unistd.h> |
| 21 | #include <linux/linkage.h> | |
| 22 | #include <linux/stringify.h> | |
| 23 | #include <linux/errno.h> | |
| 24 | #include <linux/syscalls.h> | |
| 25 | #include <linux/file.h> | |
| 26 | #include <linux/fs.h> | |
| 27 | #include <linux/mman.h> | |
| 28 | #include <linux/shm.h> | |
| 29 | ||
| 30 | typedef void (*syscall_t)(void); | |
| 31 | ||
| 32 | syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= { | |
| 33 | [0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall, | |
| 34 | ||
| fc4fb2ad | 35 | #define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol, |
| 2f72d4f6 | 36 | #include <uapi/asm/unistd.h> |
| fc4fb2ad CZ |
37 | }; |
| 38 | ||
| de73b6b1 MF |
39 | #define COLOUR_ALIGN(addr, pgoff) \ |
| 40 | ((((addr) + SHMLBA - 1) & ~(SHMLBA - 1)) + \ | |
| 41 | (((pgoff) << PAGE_SHIFT) & (SHMLBA - 1))) | |
| 42 | ||
| fc4fb2ad CZ |
43 | asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg) |
| 44 | { | |
| 45 | unsigned long ret; | |
| 46 | long err; | |
| 47 | ||
| 079a96ae | 48 | err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA); |
| fc4fb2ad CZ |
49 | if (err) |
| 50 | return err; | |
| 51 | return (long)ret; | |
| 52 | } | |
| 53 | ||
| 2f72d4f6 CZ |
54 | asmlinkage long xtensa_fadvise64_64(int fd, int advice, |
| 55 | unsigned long long offset, unsigned long long len) | |
| bc671aa9 CZ |
56 | { |
| 57 | return sys_fadvise64_64(fd, offset, len, advice); | |
| 58 | } | |
| de73b6b1 | 59 | |
| d10fa7cf | 60 | #ifdef CONFIG_MMU |
| de73b6b1 MF |
61 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, |
| 62 | unsigned long len, unsigned long pgoff, unsigned long flags) | |
| 63 | { | |
| 64 | struct vm_area_struct *vmm; | |
| 65 | ||
| 66 | if (flags & MAP_FIXED) { | |
| 67 | /* We do not accept a shared mapping if it would violate | |
| 68 | * cache aliasing constraints. | |
| 69 | */ | |
| 70 | if ((flags & MAP_SHARED) && | |
| 71 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
| 72 | return -EINVAL; | |
| 73 | return addr; | |
| 74 | } | |
| 75 | ||
| 76 | if (len > TASK_SIZE) | |
| 77 | return -ENOMEM; | |
| 78 | if (!addr) | |
| 79 | addr = TASK_UNMAPPED_BASE; | |
| 80 | ||
| 81 | if (flags & MAP_SHARED) | |
| 82 | addr = COLOUR_ALIGN(addr, pgoff); | |
| 83 | else | |
| 84 | addr = PAGE_ALIGN(addr); | |
| 85 | ||
| 86 | for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { | |
| 87 | /* At this point: (!vmm || addr < vmm->vm_end). */ | |
| 88 | if (TASK_SIZE - len < addr) | |
| 89 | return -ENOMEM; | |
| 90 | if (!vmm || addr + len <= vmm->vm_start) | |
| 91 | return addr; | |
| 92 | addr = vmm->vm_end; | |
| 93 | if (flags & MAP_SHARED) | |
| 94 | addr = COLOUR_ALIGN(addr, pgoff); | |
| 95 | } | |
| 96 | } | |
| d10fa7cf | 97 | #endif |