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26#include <asm/uaccess.h>
27#include <asm/elf.h>
28#include <linux/file.h>
29#include <linux/fs.h>
30#include <linux/linkage.h>
31#include <linux/mm.h>
32#include <linux/mman.h>
33#include <linux/shm.h>
34#include <linux/syscalls.h>
35#include <linux/utsname.h>
36#include <linux/personality.h>
37#include <linux/random.h>
38
39
40
41#define GET_LAST_MMAP(filp) \
42 (filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL)
43#define SET_LAST_MMAP(filp, val) \
44 { }
45
46static int get_offset(unsigned int last_mmap)
47{
48 return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
49}
50
51static unsigned long shared_align_offset(unsigned int last_mmap,
52 unsigned long pgoff)
53{
54 return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT;
55}
56
57static inline unsigned long COLOR_ALIGN(unsigned long addr,
58 unsigned int last_mmap, unsigned long pgoff)
59{
60 unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
61 unsigned long off = (SHM_COLOUR-1) &
62 (shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);
63
64 return base + off;
65}
66
67
68
69
70
71static unsigned long mmap_upper_limit(void)
72{
73 unsigned long stack_base;
74
75
76 stack_base = rlimit_max(RLIMIT_STACK);
77 if (stack_base > STACK_SIZE_MAX)
78 stack_base = STACK_SIZE_MAX;
79
80
81 stack_base += (STACK_RND_MASK << PAGE_SHIFT);
82
83 return PAGE_ALIGN(STACK_TOP - stack_base);
84}
85
86
87unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
88 unsigned long len, unsigned long pgoff, unsigned long flags)
89{
90 struct mm_struct *mm = current->mm;
91 struct vm_area_struct *vma;
92 unsigned long task_size = TASK_SIZE;
93 int do_color_align, last_mmap;
94 struct vm_unmapped_area_info info;
95
96 if (len > task_size)
97 return -ENOMEM;
98
99 do_color_align = 0;
100 if (filp || (flags & MAP_SHARED))
101 do_color_align = 1;
102 last_mmap = GET_LAST_MMAP(filp);
103
104 if (flags & MAP_FIXED) {
105 if ((flags & MAP_SHARED) && last_mmap &&
106 (addr - shared_align_offset(last_mmap, pgoff))
107 & (SHM_COLOUR - 1))
108 return -EINVAL;
109 goto found_addr;
110 }
111
112 if (addr) {
113 if (do_color_align && last_mmap)
114 addr = COLOR_ALIGN(addr, last_mmap, pgoff);
115 else
116 addr = PAGE_ALIGN(addr);
117
118 vma = find_vma(mm, addr);
119 if (task_size - len >= addr &&
120 (!vma || addr + len <= vma->vm_start))
121 goto found_addr;
122 }
123
124 info.flags = 0;
125 info.length = len;
126 info.low_limit = mm->mmap_legacy_base;
127 info.high_limit = mmap_upper_limit();
128 info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
129 info.align_offset = shared_align_offset(last_mmap, pgoff);
130 addr = vm_unmapped_area(&info);
131
132found_addr:
133 if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
134 SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
135
136 return addr;
137}
138
139unsigned long
140arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
141 const unsigned long len, const unsigned long pgoff,
142 const unsigned long flags)
143{
144 struct vm_area_struct *vma;
145 struct mm_struct *mm = current->mm;
146 unsigned long addr = addr0;
147 int do_color_align, last_mmap;
148 struct vm_unmapped_area_info info;
149
150#ifdef CONFIG_64BIT
151
152 BUG_ON(!test_thread_flag(TIF_32BIT));
153#endif
154
155
156 if (len > TASK_SIZE)
157 return -ENOMEM;
158
159 do_color_align = 0;
160 if (filp || (flags & MAP_SHARED))
161 do_color_align = 1;
162 last_mmap = GET_LAST_MMAP(filp);
163
164 if (flags & MAP_FIXED) {
165 if ((flags & MAP_SHARED) && last_mmap &&
166 (addr - shared_align_offset(last_mmap, pgoff))
167 & (SHM_COLOUR - 1))
168 return -EINVAL;
169 goto found_addr;
170 }
171
172
173 if (addr) {
174 if (do_color_align && last_mmap)
175 addr = COLOR_ALIGN(addr, last_mmap, pgoff);
176 else
177 addr = PAGE_ALIGN(addr);
178 vma = find_vma(mm, addr);
179 if (TASK_SIZE - len >= addr &&
180 (!vma || addr + len <= vma->vm_start))
181 goto found_addr;
182 }
183
184 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
185 info.length = len;
186 info.low_limit = PAGE_SIZE;
187 info.high_limit = mm->mmap_base;
188 info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
189 info.align_offset = shared_align_offset(last_mmap, pgoff);
190 addr = vm_unmapped_area(&info);
191 if (!(addr & ~PAGE_MASK))
192 goto found_addr;
193 VM_BUG_ON(addr != -ENOMEM);
194
195
196
197
198
199
200
201 return arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
202
203found_addr:
204 if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
205 SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
206
207 return addr;
208}
209
210static int mmap_is_legacy(void)
211{
212 if (current->personality & ADDR_COMPAT_LAYOUT)
213 return 1;
214
215
216
217
218
219
220
221 return sysctl_legacy_va_layout;
222}
223
224static unsigned long mmap_rnd(void)
225{
226 unsigned long rnd = 0;
227
228
229
230
231
232 if (current->flags & PF_RANDOMIZE) {
233 if (is_32bit_task())
234 rnd = get_random_int() % (1<<8);
235 else
236 rnd = get_random_int() % (1<<28);
237 }
238 return rnd << PAGE_SHIFT;
239}
240
241static unsigned long mmap_legacy_base(void)
242{
243 return TASK_UNMAPPED_BASE + mmap_rnd();
244}
245
246
247
248
249
250void arch_pick_mmap_layout(struct mm_struct *mm)
251{
252 mm->mmap_legacy_base = mmap_legacy_base();
253 mm->mmap_base = mmap_upper_limit();
254
255 if (mmap_is_legacy()) {
256 mm->mmap_base = mm->mmap_legacy_base;
257 mm->get_unmapped_area = arch_get_unmapped_area;
258 } else {
259 mm->get_unmapped_area = arch_get_unmapped_area_topdown;
260 }
261}
262
263
264asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
265 unsigned long prot, unsigned long flags, unsigned long fd,
266 unsigned long pgoff)
267{
268
269
270 return sys_mmap_pgoff(addr, len, prot, flags, fd,
271 pgoff >> (PAGE_SHIFT - 12));
272}
273
274asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
275 unsigned long prot, unsigned long flags, unsigned long fd,
276 unsigned long offset)
277{
278 if (!(offset & ~PAGE_MASK)) {
279 return sys_mmap_pgoff(addr, len, prot, flags, fd,
280 offset >> PAGE_SHIFT);
281 } else {
282 return -EINVAL;
283 }
284}
285
286
287
288#ifdef CONFIG_64BIT
289asmlinkage long parisc_truncate64(const char __user * path,
290 unsigned int high, unsigned int low)
291{
292 return sys_truncate(path, (long)high << 32 | low);
293}
294
295asmlinkage long parisc_ftruncate64(unsigned int fd,
296 unsigned int high, unsigned int low)
297{
298 return sys_ftruncate(fd, (long)high << 32 | low);
299}
300
301
302
303asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
304{
305 return sys_truncate(path, length);
306}
307asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
308{
309 return sys_ftruncate(fd, length);
310}
311asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
312{
313 return sys_fcntl(fd, cmd, arg);
314}
315#else
316
317asmlinkage long parisc_truncate64(const char __user * path,
318 unsigned int high, unsigned int low)
319{
320 return sys_truncate64(path, (loff_t)high << 32 | low);
321}
322
323asmlinkage long parisc_ftruncate64(unsigned int fd,
324 unsigned int high, unsigned int low)
325{
326 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
327}
328#endif
329
330asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
331 unsigned int high, unsigned int low)
332{
333 return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
334}
335
336asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
337 size_t count, unsigned int high, unsigned int low)
338{
339 return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
340}
341
342asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
343 size_t count)
344{
345 return sys_readahead(fd, (loff_t)high << 32 | low, count);
346}
347
348asmlinkage long parisc_fadvise64_64(int fd,
349 unsigned int high_off, unsigned int low_off,
350 unsigned int high_len, unsigned int low_len, int advice)
351{
352 return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
353 (loff_t)high_len << 32 | low_len, advice);
354}
355
356asmlinkage long parisc_sync_file_range(int fd,
357 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
358 unsigned int flags)
359{
360 return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
361 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
362}
363
364asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
365 u32 lenhi, u32 lenlo)
366{
367 return sys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
368 ((u64)lenhi << 32) | lenlo);
369}
370
371asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
372{
373 return -ENOMEM;
374}
375
376asmlinkage int sys_free_hugepages(unsigned long addr)
377{
378 return -EINVAL;
379}
380
381long parisc_personality(unsigned long personality)
382{
383 long err;
384
385 if (personality(current->personality) == PER_LINUX32
386 && personality(personality) == PER_LINUX)
387 personality = (personality & ~PER_MASK) | PER_LINUX32;
388
389 err = sys_personality(personality);
390 if (personality(err) == PER_LINUX32)
391 err = (err & ~PER_MASK) | PER_LINUX;
392
393 return err;
394}
395