[linux-block.git] / arch / parisc / kernel / sys_parisc.c

// SPDX-License-Identifier: GPL-2.0-or-later

/*
 *    PARISC specific syscalls
 *
 *    Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
 *    Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
 *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
 *    Copyright (C) 1999-2014 Helge Deller <deller@gmx.de>
 */

#include <linux/uaccess.h>
#include <asm/elf.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/linkage.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/sched/signal.h>
#include <linux/sched/mm.h>
#include <linux/shm.h>
#include <linux/syscalls.h>
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/random.h>

/* we construct an artificial offset for the mapping based on the physical
 * address of the kernel mapping variable */
#define GET_LAST_MMAP(filp)		\
	(filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL)
#define SET_LAST_MMAP(filp, val)	\
	 { /* nothing */ }

static int get_offset(unsigned int last_mmap)
{
	return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
}

static unsigned long shared_align_offset(unsigned int last_mmap,
					 unsigned long pgoff)
{
	return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT;
}

static inline unsigned long COLOR_ALIGN(unsigned long addr,
			 unsigned int last_mmap, unsigned long pgoff)
{
	unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
	unsigned long off  = (SHM_COLOUR-1) &
		(shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);

	return base + off;
}

/*
 * Top of mmap area (just below the process stack).
 */

/*
 * When called from arch_get_unmapped_area(), rlim_stack will be NULL,
 * indicating that "current" should be used instead of a passed-in
 * value from the exec bprm as done with arch_pick_mmap_layout().
 */
static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
{
	unsigned long stack_base;

	/* Limit stack size - see setup_arg_pages() in fs/exec.c */
	stack_base = rlim_stack ? rlim_stack->rlim_max
				: rlimit_max(RLIMIT_STACK);
	if (stack_base > STACK_SIZE_MAX)
		stack_base = STACK_SIZE_MAX;

	/* Add space for stack randomization. */
	if (current->flags & PF_RANDOMIZE)
		stack_base += (STACK_RND_MASK << PAGE_SHIFT);

	return PAGE_ALIGN(STACK_TOP - stack_base);
}


unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
		unsigned long len, unsigned long pgoff, unsigned long flags)
{
	struct mm_struct *mm = current->mm;
	struct vm_area_struct *vma, *prev;
	unsigned long task_size = TASK_SIZE;
	int do_color_align, last_mmap;
	struct vm_unmapped_area_info info;

	if (len > task_size)
		return -ENOMEM;

	do_color_align = 0;
	if (filp || (flags & MAP_SHARED))
		do_color_align = 1;
	last_mmap = GET_LAST_MMAP(filp);

	if (flags & MAP_FIXED) {
		if ((flags & MAP_SHARED) && last_mmap &&
		    (addr - shared_align_offset(last_mmap, pgoff))
				& (SHM_COLOUR - 1))
			return -EINVAL;
		goto found_addr;
	}

	if (addr) {
		if (do_color_align && last_mmap)
			addr = COLOR_ALIGN(addr, last_mmap, pgoff);
		else
			addr = PAGE_ALIGN(addr);

		vma = find_vma_prev(mm, addr, &prev);
		if (task_size - len >= addr &&
		    (!vma || addr + len <= vm_start_gap(vma)) &&
		    (!prev || addr >= vm_end_gap(prev)))
			goto found_addr;
	}

	info.flags = 0;
	info.length = len;
	info.low_limit = mm->mmap_legacy_base;
	info.high_limit = mmap_upper_limit(NULL);
	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
	info.align_offset = shared_align_offset(last_mmap, pgoff);
	addr = vm_unmapped_area(&info);

found_addr:
	if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
		SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));

	return addr;
}

unsigned long
arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
			  const unsigned long len, const unsigned long pgoff,
			  const unsigned long flags)
{
	struct vm_area_struct *vma, *prev;
	struct mm_struct *mm = current->mm;
	unsigned long addr = addr0;
	int do_color_align, last_mmap;
	struct vm_unmapped_area_info info;

	/* requested length too big for entire address space */
	if (len > TASK_SIZE)
		return -ENOMEM;

	do_color_align = 0;
	if (filp || (flags & MAP_SHARED))
		do_color_align = 1;
	last_mmap = GET_LAST_MMAP(filp);

	if (flags & MAP_FIXED) {
		if ((flags & MAP_SHARED) && last_mmap &&
		    (addr - shared_align_offset(last_mmap, pgoff))
			& (SHM_COLOUR - 1))
			return -EINVAL;
		goto found_addr;
	}

	/* requesting a specific address */
	if (addr) {
		if (do_color_align && last_mmap)
			addr = COLOR_ALIGN(addr, last_mmap, pgoff);
		else
			addr = PAGE_ALIGN(addr);

		vma = find_vma_prev(mm, addr, &prev);
		if (TASK_SIZE - len >= addr &&
		    (!vma || addr + len <= vm_start_gap(vma)) &&
		    (!prev || addr >= vm_end_gap(prev)))
			goto found_addr;
	}

	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
	info.length = len;
	info.low_limit = PAGE_SIZE;
	info.high_limit = mm->mmap_base;
	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
	info.align_offset = shared_align_offset(last_mmap, pgoff);
	addr = vm_unmapped_area(&info);
	if (!(addr & ~PAGE_MASK))
		goto found_addr;
	VM_BUG_ON(addr != -ENOMEM);

	/*
	 * A failed mmap() very likely causes application failure,
	 * so fall back to the bottom-up function here. This scenario
	 * can happen with large stack limits and large mmap()
	 * allocations.
	 */
	return arch_get_unmapped_area(filp, addr0, len, pgoff, flags);

found_addr:
	if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
		SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));

	return addr;
}

static int mmap_is_legacy(void)
{
	if (current->personality & ADDR_COMPAT_LAYOUT)
		return 1;

	/* parisc stack always grows up - so a unlimited stack should
	 * not be an indicator to use the legacy memory layout.
	 * if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
	 *	return 1;
	 */

	return sysctl_legacy_va_layout;
}

static unsigned long mmap_rnd(void)
{
	unsigned long rnd = 0;

	if (current->flags & PF_RANDOMIZE)
		rnd = get_random_int() & MMAP_RND_MASK;

	return rnd << PAGE_SHIFT;
}

unsigned long arch_mmap_rnd(void)
{
	return (get_random_int() & MMAP_RND_MASK) << PAGE_SHIFT;
}

static unsigned long mmap_legacy_base(void)
{
	return TASK_UNMAPPED_BASE + mmap_rnd();
}

/*
 * This function, called very early during the creation of a new
 * process VM image, sets up which VM layout function to use:
 */
void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
{
	mm->mmap_legacy_base = mmap_legacy_base();
	mm->mmap_base = mmap_upper_limit(rlim_stack);

	if (mmap_is_legacy()) {
		mm->mmap_base = mm->mmap_legacy_base;
		mm->get_unmapped_area = arch_get_unmapped_area;
	} else {
		mm->get_unmapped_area = arch_get_unmapped_area_topdown;
	}
}


asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
	unsigned long prot, unsigned long flags, unsigned long fd,
	unsigned long pgoff)
{
	/* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
	   we have. */
	return ksys_mmap_pgoff(addr, len, prot, flags, fd,
			       pgoff >> (PAGE_SHIFT - 12));
}

asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
		unsigned long prot, unsigned long flags, unsigned long fd,
		unsigned long offset)
{
	if (!(offset & ~PAGE_MASK)) {
		return ksys_mmap_pgoff(addr, len, prot, flags, fd,
					offset >> PAGE_SHIFT);
	} else {
		return -EINVAL;
	}
}

/* Fucking broken ABI */

#ifdef CONFIG_64BIT
asmlinkage long parisc_truncate64(const char __user * path,
					unsigned int high, unsigned int low)
{
	return ksys_truncate(path, (long)high << 32 | low);
}

asmlinkage long parisc_ftruncate64(unsigned int fd,
					unsigned int high, unsigned int low)
{
	return ksys_ftruncate(fd, (long)high << 32 | low);
}

/* stubs for the benefit of the syscall_table since truncate64 and truncate 
 * are identical on LP64 */
asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
{
	return ksys_truncate(path, length);
}
asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
{
	return ksys_ftruncate(fd, length);
}
asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	return sys_fcntl(fd, cmd, arg);
}
#else

asmlinkage long parisc_truncate64(const char __user * path,
					unsigned int high, unsigned int low)
{
	return ksys_truncate(path, (loff_t)high << 32 | low);
}

asmlinkage long parisc_ftruncate64(unsigned int fd,
					unsigned int high, unsigned int low)
{
	return sys_ftruncate64(fd, (loff_t)high << 32 | low);
}
#endif

asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
					unsigned int high, unsigned int low)
{
	return ksys_pread64(fd, buf, count, (loff_t)high << 32 | low);
}

asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
			size_t count, unsigned int high, unsigned int low)
{
	return ksys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
}

asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
		                    size_t count)
{
	return ksys_readahead(fd, (loff_t)high << 32 | low, count);
}

asmlinkage long parisc_fadvise64_64(int fd,
			unsigned int high_off, unsigned int low_off,
			unsigned int high_len, unsigned int low_len, int advice)
{
	return ksys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
			(loff_t)high_len << 32 | low_len, advice);
}

asmlinkage long parisc_sync_file_range(int fd,
			u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
			unsigned int flags)
{
	return ksys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
			(loff_t)hi_nbytes << 32 | lo_nbytes, flags);
}

asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				u32 lenhi, u32 lenlo)
{
	return ksys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
			      ((u64)lenhi << 32) | lenlo);
}

long parisc_personality(unsigned long personality)
{
	long err;

	if (personality(current->personality) == PER_LINUX32
	    && personality(personality) == PER_LINUX)
		personality = (personality & ~PER_MASK) | PER_LINUX32;

	err = sys_personality(personality);
	if (personality(err) == PER_LINUX32)
		err = (err & ~PER_MASK) | PER_LINUX;

	return err;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	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>
9dabf60d	9	* Copyright (C) 1999-2014 Helge Deller <deller@gmx.de>
1da177e4 LT	10	*/
1da177e4 LT	11
7c0f6ba6	12	#include <linux/uaccess.h>
9dabf60d	13	#include <asm/elf.h>
1da177e4 LT	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>
3f07c014	19	#include <linux/sched/signal.h>
01042607	20	#include <linux/sched/mm.h>
1da177e4	21	#include <linux/shm.h>
1da177e4	22	#include <linux/syscalls.h>
75a49581 KM	23	#include <linux/utsname.h>
75a49581 KM	24	#include <linux/personality.h>
9dabf60d	25	#include <linux/random.h>
1da177e4	26
9dabf60d HD	27	/* we construct an artificial offset for the mapping based on the physical
	28	* address of the kernel mapping variable */
	29	#define GET_LAST_MMAP(filp) \
	30	(filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL)
	31	#define SET_LAST_MMAP(filp, val) \
	32	{ /* nothing */ }
	33
	34	static int get_offset(unsigned int last_mmap)
1da177e4	35	{
0ef36bd2	36	return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
9dabf60d	37	}
1da177e4	38
9dabf60d HD	39	static unsigned long shared_align_offset(unsigned int last_mmap,
	40	unsigned long pgoff)
	41	{
	42	return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT;
1da177e4 LT	43	}
1da177e4 LT	44
9dabf60d HD	45	static inline unsigned long COLOR_ALIGN(unsigned long addr,
9dabf60d HD	46	unsigned int last_mmap, unsigned long pgoff)
1da177e4	47	{
0ef36bd2 HD	48	unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
0ef36bd2 HD	49	unsigned long off = (SHM_COLOUR-1) &
9dabf60d HD	50	(shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);
	51
	52	return base + off;
1da177e4 LT	53	}
1da177e4 LT	54
9dabf60d HD	55	/*
	56	* Top of mmap area (just below the process stack).
	57	*/
	58
8f2af155 KC	59	/*
	60	* When called from arch_get_unmapped_area(), rlim_stack will be NULL,
	61	* indicating that "current" should be used instead of a passed-in
	62	* value from the exec bprm as done with arch_pick_mmap_layout().
	63	*/
	64	static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
0576da2c	65	{
9dabf60d	66	unsigned long stack_base;
0576da2c	67
042d27ac	68	/* Limit stack size - see setup_arg_pages() in fs/exec.c */
8f2af155 KC	69	stack_base = rlim_stack ? rlim_stack->rlim_max
8f2af155 KC	70	: rlimit_max(RLIMIT_STACK);
042d27ac HD	71	if (stack_base > STACK_SIZE_MAX)
042d27ac HD	72	stack_base = STACK_SIZE_MAX;
9dabf60d	73
d045c77c	74	/* Add space for stack randomization. */
17d9822d AG	75	if (current->flags & PF_RANDOMIZE)
17d9822d AG	76	stack_base += (STACK_RND_MASK << PAGE_SHIFT);
d045c77c	77
9dabf60d	78	return PAGE_ALIGN(STACK_TOP - stack_base);
0576da2c HD	79	}
0576da2c HD	80
9dabf60d HD	81
	82	unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
	83	unsigned long len, unsigned long pgoff, unsigned long flags)
1da177e4	84	{
9dabf60d	85	struct mm_struct *mm = current->mm;
1be7107f	86	struct vm_area_struct vma, prev;
9dabf60d HD	87	unsigned long task_size = TASK_SIZE;
9dabf60d HD	88	int do_color_align, last_mmap;
a0031197	89	struct vm_unmapped_area_info info;
1da177e4	90
9dabf60d HD	91	if (len > task_size)
	92	return -ENOMEM;
	93
	94	do_color_align = 0;
	95	if (filp \|\| (flags & MAP_SHARED))
	96	do_color_align = 1;
	97	last_mmap = GET_LAST_MMAP(filp);
	98
	99	if (flags & MAP_FIXED) {
	100	if ((flags & MAP_SHARED) && last_mmap &&
	101	(addr - shared_align_offset(last_mmap, pgoff))
0ef36bd2	102	& (SHM_COLOUR - 1))
9dabf60d HD	103	return -EINVAL;
	104	goto found_addr;
	105	}
	106
	107	if (addr) {
	108	if (do_color_align && last_mmap)
	109	addr = COLOR_ALIGN(addr, last_mmap, pgoff);
	110	else
	111	addr = PAGE_ALIGN(addr);
	112
1be7107f	113	vma = find_vma_prev(mm, addr, &prev);
9dabf60d	114	if (task_size - len >= addr &&
1be7107f HD	115	(!vma \|\| addr + len <= vm_start_gap(vma)) &&
1be7107f HD	116	(!prev \|\| addr >= vm_end_gap(prev)))
9dabf60d HD	117	goto found_addr;
	118	}
	119
a0031197 ML	120	info.flags = 0;
a0031197 ML	121	info.length = len;
9dabf60d	122	info.low_limit = mm->mmap_legacy_base;
8f2af155	123	info.high_limit = mmap_upper_limit(NULL);
0ef36bd2	124	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
9dabf60d HD	125	info.align_offset = shared_align_offset(last_mmap, pgoff);
	126	addr = vm_unmapped_area(&info);
	127
	128	found_addr:
	129	if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
	130	SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
	131
	132	return addr;
1da177e4 LT	133	}
1da177e4 LT	134
9dabf60d HD	135	unsigned long
	136	arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
	137	const unsigned long len, const unsigned long pgoff,
	138	const unsigned long flags)
1da177e4	139	{
1be7107f	140	struct vm_area_struct vma, prev;
9dabf60d HD	141	struct mm_struct *mm = current->mm;
	142	unsigned long addr = addr0;
	143	int do_color_align, last_mmap;
	144	struct vm_unmapped_area_info info;
	145
9dabf60d	146	/* requested length too big for entire address space */
1da177e4 LT	147	if (len > TASK_SIZE)
1da177e4 LT	148	return -ENOMEM;
9dabf60d HD	149
	150	do_color_align = 0;
	151	if (filp \|\| (flags & MAP_SHARED))
	152	do_color_align = 1;
	153	last_mmap = GET_LAST_MMAP(filp);
	154
5ca8b91d	155	if (flags & MAP_FIXED) {
9dabf60d HD	156	if ((flags & MAP_SHARED) && last_mmap &&
9dabf60d HD	157	(addr - shared_align_offset(last_mmap, pgoff))
0ef36bd2	158	& (SHM_COLOUR - 1))
5ca8b91d	159	return -EINVAL;
9dabf60d	160	goto found_addr;
5ca8b91d	161	}
1da177e4	162
9dabf60d HD	163	/* requesting a specific address */
	164	if (addr) {
	165	if (do_color_align && last_mmap)
	166	addr = COLOR_ALIGN(addr, last_mmap, pgoff);
	167	else
	168	addr = PAGE_ALIGN(addr);
1be7107f HD	169
1be7107f HD	170	vma = find_vma_prev(mm, addr, &prev);
9dabf60d	171	if (TASK_SIZE - len >= addr &&
1be7107f HD	172	(!vma \|\| addr + len <= vm_start_gap(vma)) &&
1be7107f HD	173	(!prev \|\| addr >= vm_end_gap(prev)))
9dabf60d HD	174	goto found_addr;
	175	}
	176
	177	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
	178	info.length = len;
	179	info.low_limit = PAGE_SIZE;
	180	info.high_limit = mm->mmap_base;
0ef36bd2	181	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
9dabf60d HD	182	info.align_offset = shared_align_offset(last_mmap, pgoff);
	183	addr = vm_unmapped_area(&info);
	184	if (!(addr & ~PAGE_MASK))
	185	goto found_addr;
	186	VM_BUG_ON(addr != -ENOMEM);
	187
	188	/*
	189	* A failed mmap() very likely causes application failure,
	190	* so fall back to the bottom-up function here. This scenario
	191	* can happen with large stack limits and large mmap()
	192	* allocations.
	193	*/
	194	return arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
	195
	196	found_addr:
	197	if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK))
	198	SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT));
0576da2c	199
1da177e4 LT	200	return addr;
	201	}
	202
9dabf60d HD	203	static int mmap_is_legacy(void)
	204	{
	205	if (current->personality & ADDR_COMPAT_LAYOUT)
	206	return 1;
	207
	208	/* parisc stack always grows up - so a unlimited stack should
	209	* not be an indicator to use the legacy memory layout.
	210	* if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
	211	* return 1;
	212	*/
	213
	214	return sysctl_legacy_va_layout;
	215	}
	216
	217	static unsigned long mmap_rnd(void)
	218	{
	219	unsigned long rnd = 0;
	220
18d98a79 HD	221	if (current->flags & PF_RANDOMIZE)
	222	rnd = get_random_int() & MMAP_RND_MASK;
	223
9dabf60d HD	224	return rnd << PAGE_SHIFT;
	225	}
	226
18d98a79 HD	227	unsigned long arch_mmap_rnd(void)
	228	{
	229	return (get_random_int() & MMAP_RND_MASK) << PAGE_SHIFT;
	230	}
	231
9dabf60d HD	232	static unsigned long mmap_legacy_base(void)
	233	{
	234	return TASK_UNMAPPED_BASE + mmap_rnd();
	235	}
	236
	237	/*
	238	* This function, called very early during the creation of a new
	239	* process VM image, sets up which VM layout function to use:
	240	*/
8f2af155	241	void arch_pick_mmap_layout(struct mm_struct mm, struct rlimit rlim_stack)
9dabf60d HD	242	{
9dabf60d HD	243	mm->mmap_legacy_base = mmap_legacy_base();
8f2af155	244	mm->mmap_base = mmap_upper_limit(rlim_stack);
9dabf60d HD	245
	246	if (mmap_is_legacy()) {
	247	mm->mmap_base = mm->mmap_legacy_base;
	248	mm->get_unmapped_area = arch_get_unmapped_area;
	249	} else {
	250	mm->get_unmapped_area = arch_get_unmapped_area_topdown;
	251	}
	252	}
	253
	254
1da177e4 LT	255	asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
	256	unsigned long prot, unsigned long flags, unsigned long fd,
	257	unsigned long pgoff)
	258	{
	259	/* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
	260	we have. */
a90f590a DB	261	return ksys_mmap_pgoff(addr, len, prot, flags, fd,
a90f590a DB	262	pgoff >> (PAGE_SHIFT - 12));
1da177e4 LT	263	}
	264
	265	asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
	266	unsigned long prot, unsigned long flags, unsigned long fd,
	267	unsigned long offset)
	268	{
	269	if (!(offset & ~PAGE_MASK)) {
a90f590a	270	return ksys_mmap_pgoff(addr, len, prot, flags, fd,
f8b72560	271	offset >> PAGE_SHIFT);
1da177e4 LT	272	} else {
	273	return -EINVAL;
	274	}
	275	}
	276
1da177e4 LT	277	/* Fucking broken ABI */
	278
	279	#ifdef CONFIG_64BIT
	280	asmlinkage long parisc_truncate64(const char __user * path,
	281	unsigned int high, unsigned int low)
	282	{
df260e21	283	return ksys_truncate(path, (long)high << 32 \| low);
1da177e4 LT	284	}
	285
	286	asmlinkage long parisc_ftruncate64(unsigned int fd,
	287	unsigned int high, unsigned int low)
	288	{
411d9475	289	return ksys_ftruncate(fd, (long)high << 32 \| low);
1da177e4 LT	290	}
	291
	292	/* stubs for the benefit of the syscall_table since truncate64 and truncate
	293	* are identical on LP64 */
	294	asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
	295	{
df260e21	296	return ksys_truncate(path, length);
1da177e4 LT	297	}
	298	asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
	299	{
411d9475	300	return ksys_ftruncate(fd, length);
1da177e4 LT	301	}
	302	asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
	303	{
	304	return sys_fcntl(fd, cmd, arg);
	305	}
	306	#else
	307
	308	asmlinkage long parisc_truncate64(const char __user * path,
	309	unsigned int high, unsigned int low)
	310	{
df260e21	311	return ksys_truncate(path, (loff_t)high << 32 \| low);
1da177e4 LT	312	}
	313
	314	asmlinkage long parisc_ftruncate64(unsigned int fd,
	315	unsigned int high, unsigned int low)
	316	{
	317	return sys_ftruncate64(fd, (loff_t)high << 32 \| low);
	318	}
	319	#endif
	320
	321	asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
	322	unsigned int high, unsigned int low)
	323	{
36028d5d	324	return ksys_pread64(fd, buf, count, (loff_t)high << 32 \| low);
1da177e4 LT	325	}
	326
	327	asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
	328	size_t count, unsigned int high, unsigned int low)
	329	{
36028d5d	330	return ksys_pwrite64(fd, buf, count, (loff_t)high << 32 \| low);
1da177e4 LT	331	}
	332
	333	asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
	334	size_t count)
	335	{
c7b95d51	336	return ksys_readahead(fd, (loff_t)high << 32 \| low, count);
1da177e4 LT	337	}
	338
	339	asmlinkage long parisc_fadvise64_64(int fd,
	340	unsigned int high_off, unsigned int low_off,
	341	unsigned int high_len, unsigned int low_len, int advice)
	342	{
9d5b7c95	343	return ksys_fadvise64_64(fd, (loff_t)high_off << 32 \| low_off,
1da177e4 LT	344	(loff_t)high_len << 32 \| low_len, advice);
	345	}
	346
6ca773cf KM	347	asmlinkage long parisc_sync_file_range(int fd,
	348	u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
	349	unsigned int flags)
	350	{
806cbae1	351	return ksys_sync_file_range(fd, (loff_t)hi_off << 32 \| lo_off,
6ca773cf KM	352	(loff_t)hi_nbytes << 32 \| lo_nbytes, flags);
	353	}
	354
4474a331 HD	355	asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	356	u32 lenhi, u32 lenlo)
	357	{
edf292c7 DB	358	return ksys_fallocate(fd, mode, ((u64)offhi << 32) \| offlo,
edf292c7 DB	359	((u64)lenhi << 32) \| lenlo);
4474a331 HD	360	}
4474a331 HD	361
75a49581 KM	362	long parisc_personality(unsigned long personality)
	363	{
	364	long err;
	365
	366	if (personality(current->personality) == PER_LINUX32
5b24c421 JK	367	&& personality(personality) == PER_LINUX)
5b24c421 JK	368	personality = (personality & ~PER_MASK) \| PER_LINUX32;
75a49581 KM	369
75a49581 KM	370	err = sys_personality(personality);
5b24c421 JK	371	if (personality(err) == PER_LINUX32)
5b24c421 JK	372	err = (err & ~PER_MASK) \| PER_LINUX;
75a49581 KM	373
	374	return err;
	375	}