/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_UACCESS_H #define _ASM_UACCESS_H /* * User space memory access functions */ #include <linux/compiler.h> #include <linux/string.h> #include <asm/asi.h> #include <asm/spitfire.h> #include <asm/extable_64.h> #include <asm/processor.h> /* * Sparc64 is segmented, though more like the M68K than the I386. * We use the secondary ASI to address user memory, which references a * completely different VM map, thus there is zero chance of the user * doing something queer and tricking us into poking kernel memory. * * What is left here is basically what is needed for the other parts of * the kernel that expect to be able to manipulate, erum, "segments". * Or perhaps more properly, permissions. * * "For historical reasons, these macros are grossly misnamed." -Linus */ #define KERNEL_DS ((mm_segment_t) { ASI_P }) #define USER_DS ((mm_segment_t) { ASI_AIUS }) /* har har har */ #define get_fs() ((mm_segment_t){(current_thread_info()->current_ds)}) #define get_ds() (KERNEL_DS) #define segment_eq(a, b) ((a).seg == (b).seg) #define set_fs(val) \ do { \ current_thread_info()->current_ds = (val).seg; \ __asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \ } while(0) /* * Test whether a block of memory is a valid user space address. * Returns 0 if the range is valid, nonzero otherwise. */ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, unsigned long limit) { if (__builtin_constant_p(size)) return addr > limit - size; addr += size; if (addr < size) return true; return addr > limit; } #define __range_not_ok(addr, size, limit) \ ({ \ __chk_user_ptr(addr); \ __chk_range_not_ok((unsigned long __force)(addr), size, limit); \ }) static inline int __access_ok(const void __user * addr, unsigned long size) { return 1; } static inline int access_ok(int type, const void __user * addr, unsigned long size) { return 1; } void __retl_efault(void); /* Uh, these should become the main single-value transfer routines.. * They automatically use the right size if we just have the right * pointer type.. * * This gets kind of ugly. We want to return _two_ values in "get_user()" * and yet we don't want to do any pointers, because that is too much * of a performance impact. Thus we have a few rather ugly macros here, * and hide all the ugliness from the user. */ #define put_user(x, ptr) ({ \ unsigned long __pu_addr = (unsigned long)(ptr); \ __chk_user_ptr(ptr); \ __put_user_nocheck((__typeof__(*(ptr)))(x), __pu_addr, sizeof(*(ptr)));\ }) #define get_user(x, ptr) ({ \ unsigned long __gu_addr = (unsigned long)(ptr); \ __chk_user_ptr(ptr); \ __get_user_nocheck((x), __gu_addr, sizeof(*(ptr)), __typeof__(*(ptr)));\ }) #define __put_user(x, ptr) put_user(x, ptr) #define __get_user(x, ptr) get_user(x, ptr) struct __large_struct { unsigned long buf[100]; }; #define __m(x) ((struct __large_struct *)(x)) #define __put_user_nocheck(data, addr, size) ({ \ register int __pu_ret; \ switch (size) { \ case 1: __put_user_asm(data, b, addr, __pu_ret); break; \ case 2: __put_user_asm(data, h, addr, __pu_ret); break; \ case 4: __put_user_asm(data, w, addr, __pu_ret); break; \ case 8: __put_user_asm(data, x, addr, __pu_ret); break; \ default: __pu_ret = __put_user_bad(); break; \ } \ __pu_ret; \ }) #define __put_user_asm(x, size, addr, ret) \ __asm__ __volatile__( \ "/* Put user asm, inline. */\n" \ "1:\t" "st"#size "a %1, [%2] %%asi\n\t" \ "clr %0\n" \ "2:\n\n\t" \ ".section .fixup,#alloc,#execinstr\n\t" \ ".align 4\n" \ "3:\n\t" \ "sethi %%hi(2b), %0\n\t" \ "jmpl %0 + %%lo(2b), %%g0\n\t" \ " mov %3, %0\n\n\t" \ ".previous\n\t" \ ".section __ex_table,\"a\"\n\t" \ ".align 4\n\t" \ ".word 1b, 3b\n\t" \ ".previous\n\n\t" \ : "=r" (ret) : "r" (x), "r" (__m(addr)), \ "i" (-EFAULT)) int __put_user_bad(void); #define __get_user_nocheck(data, addr, size, type) ({ \ register int __gu_ret; \ register unsigned long __gu_val; \ switch (size) { \ case 1: __get_user_asm(__gu_val, ub, addr, __gu_ret); break; \ case 2: __get_user_asm(__gu_val, uh, addr, __gu_ret); break; \ case 4: __get_user_asm(__gu_val, uw, addr, __gu_ret); break; \ case 8: __get_user_asm(__gu_val, x, addr, __gu_ret); break; \ default: \ __gu_val = 0; \ __gu_ret = __get_user_bad(); \ break; \ } \ data = (__force type) __gu_val; \ __gu_ret; \ }) #define __get_user_asm(x, size, addr, ret) \ __asm__ __volatile__( \ "/* Get user asm, inline. */\n" \ "1:\t" "ld"#size "a [%2] %%asi, %1\n\t" \ "clr %0\n" \ "2:\n\n\t" \ ".section .fixup,#alloc,#execinstr\n\t" \ ".align 4\n" \ "3:\n\t" \ "sethi %%hi(2b), %0\n\t" \ "clr %1\n\t" \ "jmpl %0 + %%lo(2b), %%g0\n\t" \ " mov %3, %0\n\n\t" \ ".previous\n\t" \ ".section __ex_table,\"a\"\n\t" \ ".align 4\n\t" \ ".word 1b, 3b\n\n\t" \ ".previous\n\t" \ : "=r" (ret), "=r" (x) : "r" (__m(addr)), \ "i" (-EFAULT)) int __get_user_bad(void); unsigned long __must_check raw_copy_from_user(void *to, const void __user *from, unsigned long size); unsigned long __must_check raw_copy_to_user(void __user *to, const void *from, unsigned long size); #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER unsigned long __must_check raw_copy_in_user(void __user *to, const void __user *from, unsigned long size); unsigned long __must_check __clear_user(void __user *, unsigned long); #define clear_user __clear_user __must_check long strnlen_user(const char __user *str, long n); struct pt_regs; unsigned long compute_effective_address(struct pt_regs *, unsigned int insn, unsigned int rd); #endif /* _ASM_UACCESS_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 491 B | 0644 |
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agp.h | File | 434 B | 0644 |
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apb.h | File | 1.06 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 727 B | 0644 |
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asm.h | File | 1.08 KB | 0644 |
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asmmacro.h | File | 1.16 KB | 0644 |
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atomic.h | File | 219 B | 0644 |
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atomic_32.h | File | 2.26 KB | 0644 |
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atomic_64.h | File | 3.34 KB | 0644 |
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auxio.h | File | 310 B | 0644 |
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auxio_32.h | File | 2.55 KB | 0644 |
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auxio_64.h | File | 3.18 KB | 0644 |
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backoff.h | File | 2.7 KB | 0644 |
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barrier.h | File | 223 B | 0644 |
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barrier_32.h | File | 160 B | 0644 |
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barrier_64.h | File | 1.96 KB | 0644 |
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bbc.h | File | 9.76 KB | 0644 |
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bitext.h | File | 631 B | 0644 |
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bitops.h | File | 219 B | 0644 |
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bitops_32.h | File | 2.79 KB | 0644 |
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bitops_64.h | File | 1.64 KB | 0644 |
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btext.h | File | 145 B | 0644 |
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bug.h | File | 588 B | 0644 |
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bugs.h | File | 404 B | 0644 |
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cache.h | File | 649 B | 0644 |
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cacheflush.h | File | 373 B | 0644 |
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cacheflush_32.h | File | 1.97 KB | 0644 |
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cacheflush_64.h | File | 2.56 KB | 0644 |
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cachetlb_32.h | File | 882 B | 0644 |
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chafsr.h | File | 9.48 KB | 0644 |
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checksum.h | File | 227 B | 0644 |
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checksum_32.h | File | 6.81 KB | 0644 |
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checksum_64.h | File | 4.4 KB | 0644 |
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chmctrl.h | File | 7.91 KB | 0644 |
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clock.h | File | 231 B | 0644 |
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clocksource.h | File | 407 B | 0644 |
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cmpxchg.h | File | 223 B | 0644 |
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cmpxchg_32.h | File | 2.4 KB | 0644 |
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cmpxchg_64.h | File | 5.13 KB | 0644 |
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compat.h | File | 6.45 KB | 0644 |
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compat_signal.h | File | 565 B | 0644 |
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contregs.h | File | 1.9 KB | 0644 |
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cpu_type.h | File | 579 B | 0644 |
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cpudata.h | File | 378 B | 0644 |
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cpudata_32.h | File | 729 B | 0644 |
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cpudata_64.h | File | 1.13 KB | 0644 |
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current.h | File | 991 B | 0644 |
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dcr.h | File | 728 B | 0644 |
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dcu.h | File | 1.48 KB | 0644 |
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delay.h | File | 215 B | 0644 |
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delay_32.h | File | 907 B | 0644 |
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delay_64.h | File | 403 B | 0644 |
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device.h | File | 565 B | 0644 |
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dma-mapping.h | File | 632 B | 0644 |
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dma.h | File | 6.6 KB | 0644 |
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ebus_dma.h | File | 1.07 KB | 0644 |
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ecc.h | File | 4.34 KB | 0644 |
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eeprom.h | File | 254 B | 0644 |
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elf.h | File | 207 B | 0644 |
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elf_32.h | File | 3.19 KB | 0644 |
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elf_64.h | File | 6.47 KB | 0644 |
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estate.h | File | 2.23 KB | 0644 |
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extable_64.h | File | 727 B | 0644 |
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fb.h | File | 680 B | 0644 |
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fbio.h | File | 2.26 KB | 0644 |
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fhc.h | File | 4.43 KB | 0644 |
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floppy.h | File | 219 B | 0644 |
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floppy_32.h | File | 9.74 KB | 0644 |
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floppy_64.h | File | 18.83 KB | 0644 |
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fpumacro.h | File | 710 B | 0644 |
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ftrace.h | File | 800 B | 0644 |
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futex.h | File | 215 B | 0644 |
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futex_32.h | File | 82 B | 0644 |
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futex_64.h | File | 2.15 KB | 0644 |
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hardirq.h | File | 223 B | 0644 |
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hardirq_32.h | File | 334 B | 0644 |
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hardirq_64.h | File | 417 B | 0644 |
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head.h | File | 211 B | 0644 |
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head_32.h | File | 2.56 KB | 0644 |
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head_64.h | File | 2.13 KB | 0644 |
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hibernate.h | File | 421 B | 0644 |
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highmem.h | File | 2.02 KB | 0644 |
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hugetlb.h | File | 2.09 KB | 0644 |
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hvtramp.h | File | 782 B | 0644 |
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hw_irq.h | File | 88 B | 0644 |
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hypervisor.h | File | 110.71 KB | 0644 |
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ide.h | File | 2.19 KB | 0644 |
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idprom.h | File | 656 B | 0644 |
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intr_queue.h | File | 794 B | 0644 |
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io-unit.h | File | 2.41 KB | 0644 |
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io.h | File | 620 B | 0644 |
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io_32.h | File | 3.51 KB | 0644 |
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io_64.h | File | 10.66 KB | 0644 |
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ioctls.h | File | 358 B | 0644 |
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iommu.h | File | 215 B | 0644 |
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iommu_32.h | File | 5.73 KB | 0644 |
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iommu_64.h | File | 2.43 KB | 0644 |
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irq.h | File | 207 B | 0644 |
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irq_32.h | File | 526 B | 0644 |
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irq_64.h | File | 3.06 KB | 0644 |
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irqflags.h | File | 227 B | 0644 |
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irqflags_32.h | File | 1.03 KB | 0644 |
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irqflags_64.h | File | 1.91 KB | 0644 |
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jump_label.h | File | 1.01 KB | 0644 |
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kdebug.h | File | 219 B | 0644 |
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kdebug_32.h | File | 1.99 KB | 0644 |
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kdebug_64.h | File | 393 B | 0644 |
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kgdb.h | File | 1014 B | 0644 |
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kmap_types.h | File | 233 B | 0644 |
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kprobes.h | File | 1.41 KB | 0644 |
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ldc.h | File | 4.37 KB | 0644 |
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leon.h | File | 7.37 KB | 0644 |
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leon_amba.h | File | 8.09 KB | 0644 |
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leon_pci.h | File | 512 B | 0644 |
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lsu.h | File | 1.04 KB | 0644 |
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machines.h | File | 1.5 KB | 0644 |
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mbus.h | File | 2.93 KB | 0644 |
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mc146818rtc.h | File | 298 B | 0644 |
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mc146818rtc_32.h | File | 699 B | 0644 |
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mc146818rtc_64.h | File | 689 B | 0644 |
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mdesc.h | File | 2.99 KB | 0644 |
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memctrl.h | File | 311 B | 0644 |
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mman.h | File | 304 B | 0644 |
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mmu.h | File | 207 B | 0644 |
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mmu_32.h | File | 209 B | 0644 |
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mmu_64.h | File | 3.14 KB | 0644 |
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mmu_context.h | File | 239 B | 0644 |
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mmu_context_32.h | File | 1.07 KB | 0644 |
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mmu_context_64.h | File | 4.15 KB | 0644 |
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mmzone.h | File | 393 B | 0644 |
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msi.h | File | 774 B | 0644 |
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mxcc.h | File | 4.33 KB | 0644 |
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nmi.h | File | 354 B | 0644 |
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ns87303.h | File | 3.22 KB | 0644 |
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obio.h | File | 6.26 KB | 0644 |
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openprom.h | File | 7.3 KB | 0644 |
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oplib.h | File | 215 B | 0644 |
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oplib_32.h | File | 5.92 KB | 0644 |
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oplib_64.h | File | 8.12 KB | 0644 |
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page.h | File | 274 B | 0644 |
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page_32.h | File | 3.91 KB | 0644 |
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page_64.h | File | 4.49 KB | 0644 |
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parport.h | File | 5.68 KB | 0644 |
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pbm.h | File | 1.47 KB | 0644 |
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pci.h | File | 207 B | 0644 |
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pci_32.h | File | 1.09 KB | 0644 |
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pci_64.h | File | 1.49 KB | 0644 |
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pcic.h | File | 5.77 KB | 0644 |
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pcr.h | File | 1.85 KB | 0644 |
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percpu.h | File | 219 B | 0644 |
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percpu_32.h | File | 168 B | 0644 |
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percpu_64.h | File | 515 B | 0644 |
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perf_event.h | File | 802 B | 0644 |
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pgalloc.h | File | 223 B | 0644 |
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pgalloc_32.h | File | 1.91 KB | 0644 |
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pgalloc_64.h | File | 2.85 KB | 0644 |
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pgtable.h | File | 223 B | 0644 |
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pgtable_32.h | File | 11.35 KB | 0644 |
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pgtable_64.h | File | 30.71 KB | 0644 |
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pgtsrmmu.h | File | 6.05 KB | 0644 |
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pil.h | File | 1.08 KB | 0644 |
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processor.h | File | 231 B | 0644 |
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processor_32.h | File | 3.13 KB | 0644 |
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processor_64.h | File | 7.58 KB | 0644 |
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prom.h | File | 2.02 KB | 0644 |
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psr.h | File | 1.38 KB | 0644 |
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ptrace.h | File | 4.19 KB | 0644 |
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qrwlock.h | File | 205 B | 0644 |
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qspinlock.h | File | 215 B | 0644 |
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ross.h | File | 5.52 KB | 0644 |
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sbi.h | File | 3.34 KB | 0644 |
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scratchpad.h | File | 547 B | 0644 |
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seccomp.h | File | 225 B | 0644 |
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sections.h | File | 289 B | 0644 |
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setup.h | File | 1.52 KB | 0644 |
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sfafsr.h | File | 3.14 KB | 0644 |
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sfp-machine.h | File | 239 B | 0644 |
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sfp-machine_32.h | File | 6.79 KB | 0644 |
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sfp-machine_64.h | File | 3.1 KB | 0644 |
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shmparam.h | File | 227 B | 0644 |
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shmparam_32.h | File | 253 B | 0644 |
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shmparam_64.h | File | 306 B | 0644 |
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sigcontext.h | File | 2.55 KB | 0644 |
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signal.h | File | 835 B | 0644 |
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smp.h | File | 207 B | 0644 |
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smp_32.h | File | 3.29 KB | 0644 |
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smp_64.h | File | 1.84 KB | 0644 |
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sparsemem.h | File | 349 B | 0644 |
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spinlock.h | File | 227 B | 0644 |
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spinlock_32.h | File | 4.22 KB | 0644 |
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spinlock_64.h | File | 409 B | 0644 |
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spinlock_types.h | File | 549 B | 0644 |
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spitfire.h | File | 9.73 KB | 0644 |
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stacktrace.h | File | 166 B | 0644 |
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starfire.h | File | 418 B | 0644 |
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string.h | File | 1.13 KB | 0644 |
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string_32.h | File | 405 B | 0644 |
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string_64.h | File | 505 B | 0644 |
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sunbpp.h | File | 3.27 KB | 0644 |
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swift.h | File | 3.07 KB | 0644 |
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switch_to.h | File | 231 B | 0644 |
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switch_to_32.h | File | 3.53 KB | 0644 |
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switch_to_64.h | File | 2.58 KB | 0644 |
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syscall.h | File | 3.41 KB | 0644 |
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syscalls.h | File | 307 B | 0644 |
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termbits.h | File | 198 B | 0644 |
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termios.h | File | 4.94 KB | 0644 |
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thread_info.h | File | 239 B | 0644 |
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thread_info_32.h | File | 3.66 KB | 0644 |
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thread_info_64.h | File | 7.84 KB | 0644 |
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timer.h | File | 215 B | 0644 |
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timer_32.h | File | 1.18 KB | 0644 |
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timer_64.h | File | 2.37 KB | 0644 |
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timex.h | File | 215 B | 0644 |
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timex_32.h | File | 266 B | 0644 |
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timex_64.h | File | 423 B | 0644 |
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tlb.h | File | 207 B | 0644 |
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tlb_32.h | File | 520 B | 0644 |
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tlb_64.h | File | 913 B | 0644 |
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tlbflush.h | File | 227 B | 0644 |
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tlbflush_32.h | File | 621 B | 0644 |
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tlbflush_64.h | File | 1.73 KB | 0644 |
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topology.h | File | 227 B | 0644 |
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topology_32.h | File | 170 B | 0644 |
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topology_64.h | File | 1.51 KB | 0644 |
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trap_block.h | File | 6.51 KB | 0644 |
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traps.h | File | 577 B | 0644 |
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tsb.h | File | 12.17 KB | 0644 |
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tsunami.h | File | 1.85 KB | 0644 |
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ttable.h | File | 20.08 KB | 0644 |
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turbosparc.h | File | 3.78 KB | 0644 |
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uaccess.h | File | 363 B | 0644 |
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uaccess_32.h | File | 8.31 KB | 0644 |
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uaccess_64.h | File | 6.05 KB | 0644 |
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unaligned.h | File | 339 B | 0644 |
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unistd.h | File | 1.37 KB | 0644 |
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upa.h | File | 3.72 KB | 0644 |
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uprobes.h | File | 1.86 KB | 0644 |
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user.h | File | 102 B | 0644 |
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vaddrs.h | File | 2.02 KB | 0644 |
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vdso.h | File | 662 B | 0644 |
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vga.h | File | 964 B | 0644 |
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viking.h | File | 8.14 KB | 0644 |
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vio.h | File | 11.81 KB | 0644 |
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visasm.h | File | 1.51 KB | 0644 |
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vvar.h | File | 1.52 KB | 0644 |
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winmacro.h | File | 4.66 KB | 0644 |
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xor.h | File | 207 B | 0644 |
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xor_32.h | File | 7.31 KB | 0644 |
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xor_64.h | File | 2.5 KB | 0644 |
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