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1// SPDX-License-Identifier: GPL-2.0-or-later
2
3/*
4 * PARISC specific syscalls
5 *
6 * Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
7 * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
8 * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
9 * Copyright (C) 1999-2020 Helge Deller <deller@gmx.de>
10 */
11
12#include <linux/uaccess.h>
13#include <asm/elf.h>
14#include <linux/file.h>
15#include <linux/fs.h>
16#include <linux/linkage.h>
17#include <linux/mm.h>
18#include <linux/mman.h>
19#include <linux/sched/signal.h>
20#include <linux/sched/mm.h>
21#include <linux/shm.h>
22#include <linux/syscalls.h>
23#include <linux/utsname.h>
24#include <linux/personality.h>
25#include <linux/random.h>
26#include <linux/compat.h>
27#include <linux/elf-randomize.h>
28
29/*
30 * Construct an artificial page offset for the mapping based on the physical
31 * address of the kernel file mapping variable.
32 */
33#define GET_FILP_PGOFF(filp) \
34 (filp ? (((unsigned long) filp->f_mapping) >> 8) \
35 & ((SHM_COLOUR-1) >> PAGE_SHIFT) : 0UL)
36
37static unsigned long shared_align_offset(unsigned long filp_pgoff,
38 unsigned long pgoff)
39{
40 return (filp_pgoff + pgoff) << PAGE_SHIFT;
41}
42
43static inline unsigned long COLOR_ALIGN(unsigned long addr,
44 unsigned long filp_pgoff, unsigned long pgoff)
45{
46 unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
47 unsigned long off = (SHM_COLOUR-1) &
48 shared_align_offset(filp_pgoff, pgoff);
49 return base + off;
50}
51
52
53#define STACK_SIZE_DEFAULT (USER_WIDE_MODE \
54 ? (1 << 30) /* 1 GB */ \
55 : (CONFIG_STACK_MAX_DEFAULT_SIZE_MB*1024*1024))
56
57unsigned long calc_max_stack_size(unsigned long stack_max)
58{
59#ifdef CONFIG_COMPAT
60 if (!USER_WIDE_MODE && (stack_max == COMPAT_RLIM_INFINITY))
61 stack_max = STACK_SIZE_DEFAULT;
62 else
63#endif
64 if (stack_max == RLIM_INFINITY)
65 stack_max = STACK_SIZE_DEFAULT;
66
67 return stack_max;
68}
69
70
71/*
72 * Top of mmap area (just below the process stack).
73 */
74
75/*
76 * When called from arch_get_unmapped_area(), rlim_stack will be NULL,
77 * indicating that "current" should be used instead of a passed-in
78 * value from the exec bprm as done with arch_pick_mmap_layout().
79 */
80unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
81{
82 unsigned long stack_base;
83
84 /* Limit stack size - see setup_arg_pages() in fs/exec.c */
85 stack_base = rlim_stack ? rlim_stack->rlim_max
86 : rlimit_max(RLIMIT_STACK);
87
88 stack_base = calc_max_stack_size(stack_base);
89
90 /* Add space for stack randomization. */
91 if (current->flags & PF_RANDOMIZE)
92 stack_base += (STACK_RND_MASK << PAGE_SHIFT);
93
94 return PAGE_ALIGN(STACK_TOP - stack_base);
95}
96
97enum mmap_allocation_direction {UP, DOWN};
98
99static unsigned long arch_get_unmapped_area_common(struct file *filp,
100 unsigned long addr, unsigned long len, unsigned long pgoff,
101 unsigned long flags, enum mmap_allocation_direction dir)
102{
103 struct mm_struct *mm = current->mm;
104 struct vm_area_struct *vma, *prev;
105 unsigned long filp_pgoff;
106 int do_color_align;
107 struct vm_unmapped_area_info info = {
108 .length = len
109 };
110
111 if (unlikely(len > TASK_SIZE))
112 return -ENOMEM;
113
114 do_color_align = 0;
115 if (filp || (flags & MAP_SHARED))
116 do_color_align = 1;
117 filp_pgoff = GET_FILP_PGOFF(filp);
118
119 if (flags & MAP_FIXED) {
120 /* Even MAP_FIXED mappings must reside within TASK_SIZE */
121 if (TASK_SIZE - len < addr)
122 return -EINVAL;
123
124 if ((flags & MAP_SHARED) && filp &&
125 (addr - shared_align_offset(filp_pgoff, pgoff))
126 & (SHM_COLOUR - 1))
127 return -EINVAL;
128 return addr;
129 }
130
131 if (addr) {
132 if (do_color_align)
133 addr = COLOR_ALIGN(addr, filp_pgoff, pgoff);
134 else
135 addr = PAGE_ALIGN(addr);
136
137 vma = find_vma_prev(mm, addr, &prev);
138 if (TASK_SIZE - len >= addr &&
139 (!vma || addr + len <= vm_start_gap(vma)) &&
140 (!prev || addr >= vm_end_gap(prev)))
141 return addr;
142 }
143
144 info.align_mask = do_color_align ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
145 info.align_offset = shared_align_offset(filp_pgoff, pgoff);
146
147 if (dir == DOWN) {
148 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
149 info.low_limit = PAGE_SIZE;
150 info.high_limit = mm->mmap_base;
151 addr = vm_unmapped_area(&info);
152 if (!(addr & ~PAGE_MASK))
153 return addr;
154 VM_BUG_ON(addr != -ENOMEM);
155
156 /*
157 * A failed mmap() very likely causes application failure,
158 * so fall back to the bottom-up function here. This scenario
159 * can happen with large stack limits and large mmap()
160 * allocations.
161 */
162 }
163
164 info.low_limit = mm->mmap_base;
165 info.high_limit = mmap_upper_limit(NULL);
166 return vm_unmapped_area(&info);
167}
168
169unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
170 unsigned long len, unsigned long pgoff, unsigned long flags,
171 vm_flags_t vm_flags)
172{
173 return arch_get_unmapped_area_common(filp,
174 addr, len, pgoff, flags, UP);
175}
176
177unsigned long arch_get_unmapped_area_topdown(struct file *filp,
178 unsigned long addr, unsigned long len, unsigned long pgoff,
179 unsigned long flags, vm_flags_t vm_flags)
180{
181 return arch_get_unmapped_area_common(filp,
182 addr, len, pgoff, flags, DOWN);
183}
184
185asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
186 unsigned long prot, unsigned long flags, unsigned long fd,
187 unsigned long pgoff)
188{
189 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
190 we have. */
191 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
192 pgoff >> (PAGE_SHIFT - 12));
193}
194
195asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
196 unsigned long prot, unsigned long flags, unsigned long fd,
197 unsigned long offset)
198{
199 if (!(offset & ~PAGE_MASK)) {
200 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
201 offset >> PAGE_SHIFT);
202 } else {
203 return -EINVAL;
204 }
205}
206
207/* Fucking broken ABI */
208
209#ifdef CONFIG_64BIT
210asmlinkage long parisc_truncate64(const char __user * path,
211 unsigned int high, unsigned int low)
212{
213 return ksys_truncate(path, (long)high << 32 | low);
214}
215
216asmlinkage long parisc_ftruncate64(unsigned int fd,
217 unsigned int high, unsigned int low)
218{
219 return ksys_ftruncate(fd, (long)high << 32 | low);
220}
221
222/* stubs for the benefit of the syscall_table since truncate64 and truncate
223 * are identical on LP64 */
224asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
225{
226 return ksys_truncate(path, length);
227}
228asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
229{
230 return ksys_ftruncate(fd, length);
231}
232asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
233{
234 return sys_fcntl(fd, cmd, arg);
235}
236#else
237
238asmlinkage long parisc_truncate64(const char __user * path,
239 unsigned int high, unsigned int low)
240{
241 return ksys_truncate(path, (loff_t)high << 32 | low);
242}
243
244asmlinkage long parisc_ftruncate64(unsigned int fd,
245 unsigned int high, unsigned int low)
246{
247 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
248}
249#endif
250
251asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
252 unsigned int high, unsigned int low)
253{
254 return ksys_pread64(fd, buf, count, (loff_t)high << 32 | low);
255}
256
257asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
258 size_t count, unsigned int high, unsigned int low)
259{
260 return ksys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
261}
262
263asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
264 size_t count)
265{
266 return ksys_readahead(fd, (loff_t)high << 32 | low, count);
267}
268
269asmlinkage long parisc_fadvise64_64(int fd,
270 unsigned int high_off, unsigned int low_off,
271 unsigned int high_len, unsigned int low_len, int advice)
272{
273 return ksys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
274 (loff_t)high_len << 32 | low_len, advice);
275}
276
277asmlinkage long parisc_sync_file_range(int fd,
278 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
279 unsigned int flags)
280{
281 return ksys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
282 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
283}
284
285asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
286 u32 lenhi, u32 lenlo)
287{
288 return ksys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
289 ((u64)lenhi << 32) | lenlo);
290}
291
292asmlinkage long parisc_personality(unsigned long personality)
293{
294 long err;
295
296 if (personality(current->personality) == PER_LINUX32
297 && personality(personality) == PER_LINUX)
298 personality = (personality & ~PER_MASK) | PER_LINUX32;
299
300 err = sys_personality(personality);
301 if (personality(err) == PER_LINUX32)
302 err = (err & ~PER_MASK) | PER_LINUX;
303
304 return err;
305}
306
307/*
308 * Up to kernel v5.9 we defined O_NONBLOCK as 000200004,
309 * since then O_NONBLOCK is defined as 000200000.
310 *
311 * The following wrapper functions mask out the old
312 * O_NDELAY bit from calls which use O_NONBLOCK.
313 *
314 * XXX: Remove those in year 2022 (or later)?
315 */
316
317#define O_NONBLOCK_OLD 000200004
318#define O_NONBLOCK_MASK_OUT (O_NONBLOCK_OLD & ~O_NONBLOCK)
319
320static int FIX_O_NONBLOCK(int flags)
321{
322 if ((flags & O_NONBLOCK_MASK_OUT) &&
323 !test_thread_flag(TIF_NONBLOCK_WARNING)) {
324 set_thread_flag(TIF_NONBLOCK_WARNING);
325 pr_warn("%s(%d) uses a deprecated O_NONBLOCK value."
326 " Please recompile with newer glibc.\n",
327 current->comm, current->pid);
328 }
329 return flags & ~O_NONBLOCK_MASK_OUT;
330}
331
332asmlinkage long parisc_timerfd_create(int clockid, int flags)
333{
334 flags = FIX_O_NONBLOCK(flags);
335 return sys_timerfd_create(clockid, flags);
336}
337
338asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask,
339 size_t sizemask, int flags)
340{
341 flags = FIX_O_NONBLOCK(flags);
342 return sys_signalfd4(ufd, user_mask, sizemask, flags);
343}
344
345#ifdef CONFIG_COMPAT
346asmlinkage long parisc_compat_signalfd4(int ufd,
347 compat_sigset_t __user *user_mask,
348 compat_size_t sizemask, int flags)
349{
350 flags = FIX_O_NONBLOCK(flags);
351 return compat_sys_signalfd4(ufd, user_mask, sizemask, flags);
352}
353#endif
354
355asmlinkage long parisc_eventfd2(unsigned int count, int flags)
356{
357 flags = FIX_O_NONBLOCK(flags);
358 return sys_eventfd2(count, flags);
359}
360
361asmlinkage long parisc_userfaultfd(int flags)
362{
363 flags = FIX_O_NONBLOCK(flags);
364 return sys_userfaultfd(flags);
365}
366
367asmlinkage long parisc_pipe2(int __user *fildes, int flags)
368{
369 flags = FIX_O_NONBLOCK(flags);
370 return sys_pipe2(fildes, flags);
371}
372
373asmlinkage long parisc_inotify_init1(int flags)
374{
375 flags = FIX_O_NONBLOCK(flags);
376 return sys_inotify_init1(flags);
377}
378
379/*
380 * madvise() wrapper
381 *
382 * Up to kernel v6.1 parisc has different values than all other
383 * platforms for the MADV_xxx flags listed below.
384 * To keep binary compatibility with existing userspace programs
385 * translate the former values to the new values.
386 *
387 * XXX: Remove this wrapper in year 2025 (or later)
388 */
389
390asmlinkage notrace long parisc_madvise(unsigned long start, size_t len_in, int behavior)
391{
392 switch (behavior) {
393 case 65: behavior = MADV_MERGEABLE; break;
394 case 66: behavior = MADV_UNMERGEABLE; break;
395 case 67: behavior = MADV_HUGEPAGE; break;
396 case 68: behavior = MADV_NOHUGEPAGE; break;
397 case 69: behavior = MADV_DONTDUMP; break;
398 case 70: behavior = MADV_DODUMP; break;
399 case 71: behavior = MADV_WIPEONFORK; break;
400 case 72: behavior = MADV_KEEPONFORK; break;
401 case 73: behavior = MADV_COLLAPSE; break;
402 }
403
404 return sys_madvise(start, len_in, behavior);
405}
1// SPDX-License-Identifier: GPL-2.0-or-later
2
3/*
4 * PARISC specific syscalls
5 *
6 * Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
7 * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
8 * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
9 * Copyright (C) 1999-2020 Helge Deller <deller@gmx.de>
10 */
11
12#include <linux/uaccess.h>
13#include <asm/elf.h>
14#include <linux/file.h>
15#include <linux/fs.h>
16#include <linux/linkage.h>
17#include <linux/mm.h>
18#include <linux/mman.h>
19#include <linux/sched/signal.h>
20#include <linux/sched/mm.h>
21#include <linux/shm.h>
22#include <linux/syscalls.h>
23#include <linux/utsname.h>
24#include <linux/personality.h>
25#include <linux/random.h>
26#include <linux/compat.h>
27
28/* we construct an artificial offset for the mapping based on the physical
29 * address of the kernel mapping variable */
30#define GET_LAST_MMAP(filp) \
31 (filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL)
32#define SET_LAST_MMAP(filp, val) \
33 { /* nothing */ }
34
35static int get_offset(unsigned int last_mmap)
36{
37 return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
38}
39
40static unsigned long shared_align_offset(unsigned int last_mmap,
41 unsigned long pgoff)
42{
43 return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT;
44}
45
46static inline unsigned long COLOR_ALIGN(unsigned long addr,
47 unsigned int last_mmap, unsigned long pgoff)
48{
49 unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
50 unsigned long off = (SHM_COLOUR-1) &
51 (shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);
52
53 return base + off;
54}
55
56
57#define STACK_SIZE_DEFAULT (USER_WIDE_MODE \
58 ? (1 << 30) /* 1 GB */ \
59 : (CONFIG_STACK_MAX_DEFAULT_SIZE_MB*1024*1024))
60
61unsigned long calc_max_stack_size(unsigned long stack_max)
62{
63#ifdef CONFIG_COMPAT
64 if (!USER_WIDE_MODE && (stack_max == COMPAT_RLIM_INFINITY))
65 stack_max = STACK_SIZE_DEFAULT;
66 else
67#endif
68 if (stack_max == RLIM_INFINITY)
69 stack_max = STACK_SIZE_DEFAULT;
70
71 return stack_max;
72}
73
74
75/*
76 * Top of mmap area (just below the process stack).
77 */
78
79/*
80 * When called from arch_get_unmapped_area(), rlim_stack will be NULL,
81 * indicating that "current" should be used instead of a passed-in
82 * value from the exec bprm as done with arch_pick_mmap_layout().
83 */
84static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
85{
86 unsigned long stack_base;
87
88 /* Limit stack size - see setup_arg_pages() in fs/exec.c */
89 stack_base = rlim_stack ? rlim_stack->rlim_max
90 : rlimit_max(RLIMIT_STACK);
91
92 stack_base = calc_max_stack_size(stack_base);
93
94 /* Add space for stack randomization. */
95 if (current->flags & PF_RANDOMIZE)
96 stack_base += (STACK_RND_MASK << PAGE_SHIFT);
97
98 return PAGE_ALIGN(STACK_TOP - stack_base);
99}
100
101
102unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
103 unsigned long len, unsigned long pgoff, unsigned long flags)
104{
105 struct mm_struct *mm = current->mm;
106 struct vm_area_struct *vma, *prev;
107 unsigned long task_size = TASK_SIZE;
108 int do_color_align, last_mmap;
109 struct vm_unmapped_area_info info;
110
111 if (len > task_size)
112 return -ENOMEM;
113
114 do_color_align = 0;
115 if (filp || (flags & MAP_SHARED))
116 do_color_align = 1;
117 last_mmap = GET_LAST_MMAP(filp);
118
119 if (flags & MAP_FIXED) {
120 if ((flags & MAP_SHARED) && last_mmap &&
121 (addr - shared_align_offset(last_mmap, pgoff))
122 & (SHM_COLOUR - 1))
123 return -EINVAL;
124 goto found_addr;
125 }
126
127 if (addr) {
128 if (do_color_align && last_mmap)
129 addr = COLOR_ALIGN(addr, last_mmap, pgoff);
130 else
131 addr = PAGE_ALIGN(addr);
132
133 vma = find_vma_prev(mm, addr, &prev);
134 if (task_size - len >= addr &&
135 (!vma || addr + len <= vm_start_gap(vma)) &&
136 (!prev || addr >= vm_end_gap(prev)))
137 goto found_addr;
138 }
139
140 info.flags = 0;
141 info.length = len;
142 info.low_limit = mm->mmap_legacy_base;
143 info.high_limit = mmap_upper_limit(NULL);
144 info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
145 info.align_offset = shared_align_offset(last_mmap, pgoff);
146 addr = vm_unmapped_area(&info);
147
148found_addr:
149 if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
150 SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
151
152 return addr;
153}
154
155unsigned long
156arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
157 const unsigned long len, const unsigned long pgoff,
158 const unsigned long flags)
159{
160 struct vm_area_struct *vma, *prev;
161 struct mm_struct *mm = current->mm;
162 unsigned long addr = addr0;
163 int do_color_align, last_mmap;
164 struct vm_unmapped_area_info info;
165
166 /* requested length too big for entire address space */
167 if (len > TASK_SIZE)
168 return -ENOMEM;
169
170 do_color_align = 0;
171 if (filp || (flags & MAP_SHARED))
172 do_color_align = 1;
173 last_mmap = GET_LAST_MMAP(filp);
174
175 if (flags & MAP_FIXED) {
176 if ((flags & MAP_SHARED) && last_mmap &&
177 (addr - shared_align_offset(last_mmap, pgoff))
178 & (SHM_COLOUR - 1))
179 return -EINVAL;
180 goto found_addr;
181 }
182
183 /* requesting a specific address */
184 if (addr) {
185 if (do_color_align && last_mmap)
186 addr = COLOR_ALIGN(addr, last_mmap, pgoff);
187 else
188 addr = PAGE_ALIGN(addr);
189
190 vma = find_vma_prev(mm, addr, &prev);
191 if (TASK_SIZE - len >= addr &&
192 (!vma || addr + len <= vm_start_gap(vma)) &&
193 (!prev || addr >= vm_end_gap(prev)))
194 goto found_addr;
195 }
196
197 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
198 info.length = len;
199 info.low_limit = PAGE_SIZE;
200 info.high_limit = mm->mmap_base;
201 info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
202 info.align_offset = shared_align_offset(last_mmap, pgoff);
203 addr = vm_unmapped_area(&info);
204 if (!(addr & ~PAGE_MASK))
205 goto found_addr;
206 VM_BUG_ON(addr != -ENOMEM);
207
208 /*
209 * A failed mmap() very likely causes application failure,
210 * so fall back to the bottom-up function here. This scenario
211 * can happen with large stack limits and large mmap()
212 * allocations.
213 */
214 return arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
215
216found_addr:
217 if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
218 SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
219
220 return addr;
221}
222
223static int mmap_is_legacy(void)
224{
225 if (current->personality & ADDR_COMPAT_LAYOUT)
226 return 1;
227
228 /* parisc stack always grows up - so a unlimited stack should
229 * not be an indicator to use the legacy memory layout.
230 * if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
231 * return 1;
232 */
233
234 return sysctl_legacy_va_layout;
235}
236
237static unsigned long mmap_rnd(void)
238{
239 unsigned long rnd = 0;
240
241 if (current->flags & PF_RANDOMIZE)
242 rnd = get_random_u32() & MMAP_RND_MASK;
243
244 return rnd << PAGE_SHIFT;
245}
246
247unsigned long arch_mmap_rnd(void)
248{
249 return (get_random_u32() & MMAP_RND_MASK) << PAGE_SHIFT;
250}
251
252static unsigned long mmap_legacy_base(void)
253{
254 return TASK_UNMAPPED_BASE + mmap_rnd();
255}
256
257/*
258 * This function, called very early during the creation of a new
259 * process VM image, sets up which VM layout function to use:
260 */
261void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
262{
263 mm->mmap_legacy_base = mmap_legacy_base();
264 mm->mmap_base = mmap_upper_limit(rlim_stack);
265
266 if (mmap_is_legacy()) {
267 mm->mmap_base = mm->mmap_legacy_base;
268 mm->get_unmapped_area = arch_get_unmapped_area;
269 } else {
270 mm->get_unmapped_area = arch_get_unmapped_area_topdown;
271 }
272}
273
274
275asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
276 unsigned long prot, unsigned long flags, unsigned long fd,
277 unsigned long pgoff)
278{
279 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
280 we have. */
281 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
282 pgoff >> (PAGE_SHIFT - 12));
283}
284
285asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
286 unsigned long prot, unsigned long flags, unsigned long fd,
287 unsigned long offset)
288{
289 if (!(offset & ~PAGE_MASK)) {
290 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
291 offset >> PAGE_SHIFT);
292 } else {
293 return -EINVAL;
294 }
295}
296
297/* Fucking broken ABI */
298
299#ifdef CONFIG_64BIT
300asmlinkage long parisc_truncate64(const char __user * path,
301 unsigned int high, unsigned int low)
302{
303 return ksys_truncate(path, (long)high << 32 | low);
304}
305
306asmlinkage long parisc_ftruncate64(unsigned int fd,
307 unsigned int high, unsigned int low)
308{
309 return ksys_ftruncate(fd, (long)high << 32 | low);
310}
311
312/* stubs for the benefit of the syscall_table since truncate64 and truncate
313 * are identical on LP64 */
314asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
315{
316 return ksys_truncate(path, length);
317}
318asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
319{
320 return ksys_ftruncate(fd, length);
321}
322asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
323{
324 return sys_fcntl(fd, cmd, arg);
325}
326#else
327
328asmlinkage long parisc_truncate64(const char __user * path,
329 unsigned int high, unsigned int low)
330{
331 return ksys_truncate(path, (loff_t)high << 32 | low);
332}
333
334asmlinkage long parisc_ftruncate64(unsigned int fd,
335 unsigned int high, unsigned int low)
336{
337 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
338}
339#endif
340
341asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
342 unsigned int high, unsigned int low)
343{
344 return ksys_pread64(fd, buf, count, (loff_t)high << 32 | low);
345}
346
347asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
348 size_t count, unsigned int high, unsigned int low)
349{
350 return ksys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
351}
352
353asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
354 size_t count)
355{
356 return ksys_readahead(fd, (loff_t)high << 32 | low, count);
357}
358
359asmlinkage long parisc_fadvise64_64(int fd,
360 unsigned int high_off, unsigned int low_off,
361 unsigned int high_len, unsigned int low_len, int advice)
362{
363 return ksys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
364 (loff_t)high_len << 32 | low_len, advice);
365}
366
367asmlinkage long parisc_sync_file_range(int fd,
368 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
369 unsigned int flags)
370{
371 return ksys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
372 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
373}
374
375asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
376 u32 lenhi, u32 lenlo)
377{
378 return ksys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
379 ((u64)lenhi << 32) | lenlo);
380}
381
382long parisc_personality(unsigned long personality)
383{
384 long err;
385
386 if (personality(current->personality) == PER_LINUX32
387 && personality(personality) == PER_LINUX)
388 personality = (personality & ~PER_MASK) | PER_LINUX32;
389
390 err = sys_personality(personality);
391 if (personality(err) == PER_LINUX32)
392 err = (err & ~PER_MASK) | PER_LINUX;
393
394 return err;
395}
396
397/*
398 * Up to kernel v5.9 we defined O_NONBLOCK as 000200004,
399 * since then O_NONBLOCK is defined as 000200000.
400 *
401 * The following wrapper functions mask out the old
402 * O_NDELAY bit from calls which use O_NONBLOCK.
403 *
404 * XXX: Remove those in year 2022 (or later)?
405 */
406
407#define O_NONBLOCK_OLD 000200004
408#define O_NONBLOCK_MASK_OUT (O_NONBLOCK_OLD & ~O_NONBLOCK)
409
410static int FIX_O_NONBLOCK(int flags)
411{
412 if ((flags & O_NONBLOCK_MASK_OUT) &&
413 !test_thread_flag(TIF_NONBLOCK_WARNING)) {
414 set_thread_flag(TIF_NONBLOCK_WARNING);
415 pr_warn("%s(%d) uses a deprecated O_NONBLOCK value."
416 " Please recompile with newer glibc.\n",
417 current->comm, current->pid);
418 }
419 return flags & ~O_NONBLOCK_MASK_OUT;
420}
421
422asmlinkage long parisc_timerfd_create(int clockid, int flags)
423{
424 flags = FIX_O_NONBLOCK(flags);
425 return sys_timerfd_create(clockid, flags);
426}
427
428asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask,
429 size_t sizemask, int flags)
430{
431 flags = FIX_O_NONBLOCK(flags);
432 return sys_signalfd4(ufd, user_mask, sizemask, flags);
433}
434
435#ifdef CONFIG_COMPAT
436asmlinkage long parisc_compat_signalfd4(int ufd,
437 compat_sigset_t __user *user_mask,
438 compat_size_t sizemask, int flags)
439{
440 flags = FIX_O_NONBLOCK(flags);
441 return compat_sys_signalfd4(ufd, user_mask, sizemask, flags);
442}
443#endif
444
445asmlinkage long parisc_eventfd2(unsigned int count, int flags)
446{
447 flags = FIX_O_NONBLOCK(flags);
448 return sys_eventfd2(count, flags);
449}
450
451asmlinkage long parisc_userfaultfd(int flags)
452{
453 flags = FIX_O_NONBLOCK(flags);
454 return sys_userfaultfd(flags);
455}
456
457asmlinkage long parisc_pipe2(int __user *fildes, int flags)
458{
459 flags = FIX_O_NONBLOCK(flags);
460 return sys_pipe2(fildes, flags);
461}
462
463asmlinkage long parisc_inotify_init1(int flags)
464{
465 flags = FIX_O_NONBLOCK(flags);
466 return sys_inotify_init1(flags);
467}
468
469/*
470 * madvise() wrapper
471 *
472 * Up to kernel v6.1 parisc has different values than all other
473 * platforms for the MADV_xxx flags listed below.
474 * To keep binary compatibility with existing userspace programs
475 * translate the former values to the new values.
476 *
477 * XXX: Remove this wrapper in year 2025 (or later)
478 */
479
480asmlinkage notrace long parisc_madvise(unsigned long start, size_t len_in, int behavior)
481{
482 switch (behavior) {
483 case 65: behavior = MADV_MERGEABLE; break;
484 case 66: behavior = MADV_UNMERGEABLE; break;
485 case 67: behavior = MADV_HUGEPAGE; break;
486 case 68: behavior = MADV_NOHUGEPAGE; break;
487 case 69: behavior = MADV_DONTDUMP; break;
488 case 70: behavior = MADV_DODUMP; break;
489 case 71: behavior = MADV_WIPEONFORK; break;
490 case 72: behavior = MADV_KEEPONFORK; break;
491 case 73: behavior = MADV_COLLAPSE; break;
492 }
493
494 return sys_madvise(start, len_in, behavior);
495}