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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_UACCESS_H
#define __ASM_SH_UACCESS_H

#include <asm/segment.h>
#include <asm/extable.h>

#define __addr_ok(addr) \
	((unsigned long __force)(addr) < current_thread_info()->addr_limit.seg)

/*
 * __access_ok: Check if address with size is OK or not.
 *
 * Uhhuh, this needs 33-bit arithmetic. We have a carry..
 *
 * sum := addr + size;  carry? --> flag = true;
 * if (sum >= addr_limit) flag = true;
 */
#define __access_ok(addr, size)	({				\
	unsigned long __ao_a = (addr), __ao_b = (size);		\
	unsigned long __ao_end = __ao_a + __ao_b - !!__ao_b;	\
	__ao_end >= __ao_a && __addr_ok(__ao_end); })

#define access_ok(type, addr, size)	\
	(__chk_user_ptr(addr),		\
	 __access_ok((unsigned long __force)(addr), (size)))

#define user_addr_max()	(current_thread_info()->addr_limit.seg)

/*
 * Uh, these should become the main single-value transfer routines ...
 * They automatically use the right size if we just have the right
 * pointer type ...
 *
 * As SuperH uses the same address space for kernel and user data, we
 * can just do these as direct assignments.
 *
 * Careful to not
 * (a) re-use the arguments for side effects (sizeof is ok)
 * (b) require any knowledge of processes at this stage
 */
#define put_user(x,ptr)		__put_user_check((x), (ptr), sizeof(*(ptr)))
#define get_user(x,ptr)		__get_user_check((x), (ptr), sizeof(*(ptr)))

/*
 * The "__xxx" versions do not do address space checking, useful when
 * doing multiple accesses to the same area (the user has to do the
 * checks by hand with "access_ok()")
 */
#define __put_user(x,ptr)	__put_user_nocheck((x), (ptr), sizeof(*(ptr)))
#define __get_user(x,ptr)	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))

struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct __user *)(x))

#define __get_user_nocheck(x,ptr,size)				\
({								\
	long __gu_err;						\
	unsigned long __gu_val;					\
	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
	__chk_user_ptr(ptr);					\
	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
	__gu_err;						\
})

#define __get_user_check(x,ptr,size)					\
({									\
	long __gu_err = -EFAULT;					\
	unsigned long __gu_val = 0;					\
	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
	if (likely(access_ok(VERIFY_READ, __gu_addr, (size))))		\
		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
	__gu_err;							\
})

#define __put_user_nocheck(x,ptr,size)				\
({								\
	long __pu_err;						\
	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
	__typeof__(*(ptr)) __pu_val = x;			\
	__chk_user_ptr(ptr);					\
	__put_user_size(__pu_val, __pu_addr, (size), __pu_err);	\
	__pu_err;						\
})

#define __put_user_check(x,ptr,size)				\
({								\
	long __pu_err = -EFAULT;				\
	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
	__typeof__(*(ptr)) __pu_val = x;			\
	if (likely(access_ok(VERIFY_WRITE, __pu_addr, size)))	\
		__put_user_size(__pu_val, __pu_addr, (size),	\
				__pu_err);			\
	__pu_err;						\
})

#ifdef CONFIG_SUPERH32
# include <asm/uaccess_32.h>
#else
# include <asm/uaccess_64.h>
#endif

extern long strncpy_from_user(char *dest, const char __user *src, long count);

extern __must_check long strnlen_user(const char __user *str, long n);

/* Generic arbitrary sized copy.  */
/* Return the number of bytes NOT copied */
__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);

static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
	return __copy_user(to, (__force void *)from, n);
}

static __always_inline unsigned long __must_check
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
	return __copy_user((__force void *)to, from, n);
}
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER

/*
 * Clear the area and return remaining number of bytes
 * (on failure.  Usually it's 0.)
 */
__kernel_size_t __clear_user(void *addr, __kernel_size_t size);

#define clear_user(addr,n)						\
({									\
	void __user * __cl_addr = (addr);				\
	unsigned long __cl_size = (n);					\
									\
	if (__cl_size && access_ok(VERIFY_WRITE,			\
		((unsigned long)(__cl_addr)), __cl_size))		\
		__cl_size = __clear_user(__cl_addr, __cl_size);		\
									\
	__cl_size;							\
})

extern void *set_exception_table_vec(unsigned int vec, void *handler);

static inline void *set_exception_table_evt(unsigned int evt, void *handler)
{
	return set_exception_table_vec(evt >> 5, handler);
}

struct mem_access {
	unsigned long (*from)(void *dst, const void __user *src, unsigned long cnt);
	unsigned long (*to)(void __user *dst, const void *src, unsigned long cnt);
};

int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
			    struct mem_access *ma, int, unsigned long address);

#endif /* __ASM_SH_UACCESS_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 467 B 0644
adc.h File 253 B 0644
addrspace.h File 2.03 KB 0644
alignment.h File 654 B 0644
asm-offsets.h File 35 B 0644
atomic-grb.h File 2.6 KB 0644
atomic-irq.h File 1.63 KB 0644
atomic-llsc.h File 2.12 KB 0644
atomic.h File 1.78 KB 0644
barrier.h File 1.52 KB 0644
bitops-cas.h File 1.73 KB 0644
bitops-grb.h File 6.21 KB 0644
bitops-llsc.h File 2.79 KB 0644
bitops-op32.h File 3.78 KB 0644
bitops.h File 2.38 KB 0644
bl_bit.h File 216 B 0644
bl_bit_32.h File 639 B 0644
bl_bit_64.h File 979 B 0644
bug.h File 2.77 KB 0644
bugs.h File 1.38 KB 0644
cache.h File 1.2 KB 0644
cache_insns.h File 242 B 0644
cache_insns_32.h File 642 B 0644
cache_insns_64.h File 839 B 0644
cacheflush.h File 3.58 KB 0644
checksum.h File 140 B 0644
checksum_32.h File 5.21 KB 0644
clock.h File 436 B 0644
cmpxchg-cas.h File 549 B 0644
cmpxchg-grb.h File 2.8 KB 0644
cmpxchg-irq.h File 1.04 KB 0644
cmpxchg-llsc.h File 1.06 KB 0644
cmpxchg-xchg.h File 1.33 KB 0644
cmpxchg.h File 1.77 KB 0644
device.h File 450 B 0644
dma-mapping.h File 694 B 0644
dma-register.h File 1.8 KB 0644
dma.h File 3.74 KB 0644
dmabrg.h File 536 B 0644
dwarf.h File 9.8 KB 0644
elf.h File 7.28 KB 0644
entry-macros.S File 1.85 KB 0644
extable.h File 227 B 0644
fb.h File 375 B 0644
fixmap.h File 2.92 KB 0644
flat.h File 1.23 KB 0644
fpu.h File 1.77 KB 0644
freq.h File 472 B 0644
ftrace.h File 1.11 KB 0644
futex-cas.h File 728 B 0644
futex-irq.h File 482 B 0644
futex-llsc.h File 870 B 0644
futex.h File 1.5 KB 0644
gpio.h File 1017 B 0644
hardirq.h File 440 B 0644
hd64461.h File 11.79 KB 0644
heartbeat.h File 383 B 0644
hugetlb.h File 1.96 KB 0644
hw_breakpoint.h File 1.88 KB 0644
hw_irq.h File 915 B 0644
i2c-sh7760.h File 406 B 0644
io.h File 11.33 KB 0644
io_generic.h File 661 B 0644
io_noioport.h File 1.09 KB 0644
io_trapped.h File 1.44 KB 0644
irq.h File 1.68 KB 0644
irqflags.h File 226 B 0644
kdebug.h File 406 B 0644
kexec.h File 2.61 KB 0644
kgdb.h File 851 B 0644
kmap_types.h File 265 B 0644
kprobes.h File 1.51 KB 0644
linkage.h File 154 B 0644
machvec.h File 939 B 0644
mmu.h File 2.18 KB 0644
mmu_context.h File 4.44 KB 0644
mmu_context_32.h File 1.28 KB 0644
mmu_context_64.h File 1.97 KB 0644
mmzone.h File 1.1 KB 0644
module.h File 1005 B 0644
page.h File 6.06 KB 0644
pci.h File 3.19 KB 0644
perf_event.h File 797 B 0644
pgalloc.h File 1.86 KB 0644
pgtable-2level.h File 598 B 0644
pgtable-3level.h File 1.54 KB 0644
pgtable.h File 4 KB 0644
pgtable_32.h File 16.37 KB 0644
pgtable_64.h File 11.32 KB 0644
posix_types.h File 146 B 0644
processor.h File 4.41 KB 0644
processor_32.h File 4.67 KB 0644
processor_64.h File 5.54 KB 0644
ptrace.h File 3.39 KB 0644
ptrace_32.h File 307 B 0644
ptrace_64.h File 312 B 0644
push-switch.h File 755 B 0644
reboot.h File 472 B 0644
romimage-macros.h File 1.1 KB 0644
rtc.h File 383 B 0644
seccomp.h File 280 B 0644
sections.h File 307 B 0644
segment.h File 879 B 0644
setup.h File 725 B 0644
sfp-machine.h File 3.43 KB 0644
sh7760fb.h File 5.61 KB 0644
sh_bios.h File 743 B 0644
shmparam.h File 629 B 0644
siu.h File 539 B 0644
smc37c93x.h File 5.56 KB 0644
smp-ops.h File 1012 B 0644
smp.h File 1.83 KB 0644
sparsemem.h File 443 B 0644
spi.h File 265 B 0644
spinlock-cas.h File 2.09 KB 0644
spinlock-llsc.h File 4.13 KB 0644
spinlock.h File 578 B 0644
spinlock_types.h File 463 B 0644
sram.h File 670 B 0644
stackprotector.h File 711 B 0644
stacktrace.h File 606 B 0644
string.h File 131 B 0644
string_32.h File 2.66 KB 0644
string_64.h File 499 B 0644
suspend.h File 2.52 KB 0644
switch_to.h File 492 B 0644
switch_to_32.h File 3.55 KB 0644
switch_to_64.h File 968 B 0644
syscall.h File 267 B 0644
syscall_32.h File 2.42 KB 0644
syscall_64.h File 1.79 KB 0644
syscalls.h File 564 B 0644
syscalls_32.h File 1022 B 0644
syscalls_64.h File 441 B 0644
thread_info.h File 5.32 KB 0644
timex.h File 637 B 0644
tlb.h File 4.12 KB 0644
tlb_64.h File 2.08 KB 0644
tlbflush.h File 1.77 KB 0644
topology.h File 645 B 0644
traps.h File 487 B 0644
traps_32.h File 1.31 KB 0644
traps_64.h File 851 B 0644
types.h File 411 B 0644
uaccess.h File 4.83 KB 0644
uaccess_32.h File 3.77 KB 0644
uaccess_64.h File 2.2 KB 0644
unaligned-sh4a.h File 4.51 KB 0644
unaligned.h File 359 B 0644
uncached.h File 1.34 KB 0644
unistd.h File 952 B 0644
unwinder.h File 856 B 0644
user.h File 2.52 KB 0644
vga.h File 98 B 0644
vmlinux.lds.h File 558 B 0644
watchdog.h File 4.14 KB 0644
word-at-a-time.h File 1.29 KB 0644