Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> |
| 3 | * Copyright (C) 2007-2009 PetaLogix |
| 4 | * Copyright (C) 2007 John Williams <john.williams@petalogix.com> |
| 5 | * |
| 6 | * Copyright (C) 2006 Atmark Techno, Inc. |
| 7 | * Yasushi SHOJI <yashi@atmark-techno.com> |
| 8 | * Tetsuya OHKAWA <tetsuya@atmark-techno.com> |
| 9 | * |
| 10 | * This file is subject to the terms and conditions of the GNU General Public |
| 11 | * License. See the file "COPYING" in the main directory of this archive |
| 12 | * for more details. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/mm.h> |
| 17 | #include <linux/smp.h> |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 18 | #include <linux/syscalls.h> |
| 19 | #include <linux/sem.h> |
| 20 | #include <linux/msg.h> |
| 21 | #include <linux/shm.h> |
| 22 | #include <linux/stat.h> |
| 23 | #include <linux/mman.h> |
| 24 | #include <linux/sys.h> |
| 25 | #include <linux/ipc.h> |
| 26 | #include <linux/utsname.h> |
| 27 | #include <linux/file.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/err.h> |
| 30 | #include <linux/fs.h> |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 31 | #include <linux/semaphore.h> |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 32 | #include <linux/uaccess.h> |
| 33 | #include <linux/unistd.h> |
| 34 | |
| 35 | #include <asm/syscalls.h> |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 36 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 37 | asmlinkage long microblaze_vfork(struct pt_regs *regs) |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 38 | { |
| 39 | return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, |
| 40 | regs, 0, NULL, NULL); |
| 41 | } |
| 42 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 43 | asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs) |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 44 | { |
| 45 | if (!stack) |
| 46 | stack = regs->r1; |
| 47 | return do_fork(flags, stack, regs, 0, NULL, NULL); |
| 48 | } |
| 49 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 50 | asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv, |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 51 | char __user *__user *envp, struct pt_regs *regs) |
| 52 | { |
| 53 | int error; |
| 54 | char *filename; |
| 55 | |
| 56 | filename = getname(filenamei); |
| 57 | error = PTR_ERR(filename); |
| 58 | if (IS_ERR(filename)) |
| 59 | goto out; |
| 60 | error = do_execve(filename, argv, envp, regs); |
| 61 | putname(filename); |
| 62 | out: |
| 63 | return error; |
| 64 | } |
| 65 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 66 | asmlinkage long |
| 67 | sys_mmap2(unsigned long addr, unsigned long len, |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 68 | unsigned long prot, unsigned long flags, |
| 69 | unsigned long fd, unsigned long pgoff) |
| 70 | { |
| 71 | struct file *file = NULL; |
| 72 | int ret = -EBADF; |
| 73 | |
| 74 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 75 | if (!(flags & MAP_ANONYMOUS)) { |
| 76 | file = fget(fd); |
| 77 | if (!file) { |
| 78 | printk(KERN_INFO "no fd in mmap\r\n"); |
| 79 | goto out; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | down_write(¤t->mm->mmap_sem); |
| 84 | ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 85 | up_write(¤t->mm->mmap_sem); |
| 86 | if (file) |
| 87 | fput(file); |
| 88 | out: |
| 89 | return ret; |
| 90 | } |
| 91 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 92 | asmlinkage long sys_mmap(unsigned long addr, unsigned long len, |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 93 | unsigned long prot, unsigned long flags, |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 94 | unsigned long fd, off_t pgoff) |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 95 | { |
| 96 | int err = -EINVAL; |
| 97 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 98 | if (pgoff & ~PAGE_MASK) { |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 99 | printk(KERN_INFO "no pagemask in mmap\r\n"); |
| 100 | goto out; |
| 101 | } |
| 102 | |
Arnd Bergmann | e513588 | 2009-06-18 19:55:30 +0200 | [diff] [blame] | 103 | err = sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); |
Michal Simek | 7dcbbb2 | 2009-03-27 14:25:28 +0100 | [diff] [blame] | 104 | out: |
| 105 | return err; |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * Do a system call from kernel instead of calling sys_execve so we |
| 110 | * end up with proper pt_regs. |
| 111 | */ |
| 112 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
| 113 | { |
| 114 | register const char *__a __asm__("r5") = filename; |
| 115 | register const void *__b __asm__("r6") = argv; |
| 116 | register const void *__c __asm__("r7") = envp; |
| 117 | register unsigned long __syscall __asm__("r12") = __NR_execve; |
| 118 | register unsigned long __ret __asm__("r3"); |
| 119 | __asm__ __volatile__ ("brki r14, 0x8" |
| 120 | : "=r" (__ret), "=r" (__syscall) |
| 121 | : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) |
| 122 | : "r4", "r8", "r9", |
| 123 | "r10", "r11", "r14", "cc", "memory"); |
| 124 | return __ret; |
| 125 | } |