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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-15 20:17:52 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-15 20:17:52 +0200 |
commit | 89cbec71fead552fdd1fa38c57186669dfbba734 (patch) | |
tree | 0e8e235b23b0fc1cd2d32bb28cafdee636e62d51 /arch/mips/include/asm/uaccess.h | |
parent | Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/v... (diff) | |
parent | kill {__,}{get,put}_user_unaligned() (diff) | |
download | linux-89cbec71fead552fdd1fa38c57186669dfbba734.tar.xz linux-89cbec71fead552fdd1fa38c57186669dfbba734.zip |
Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uacess-unaligned removal from Al Viro:
"That stuff had just one user, and an exotic one, at that - binfmt_flat
on arm and m68k"
* 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
kill {__,}{get,put}_user_unaligned()
binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail
Diffstat (limited to 'arch/mips/include/asm/uaccess.h')
-rw-r--r-- | arch/mips/include/asm/uaccess.h | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h index 9700251159b1..b71306947290 100644 --- a/arch/mips/include/asm/uaccess.h +++ b/arch/mips/include/asm/uaccess.h @@ -497,283 +497,6 @@ do { \ extern void __put_user_unknown(void); /* - * ul{b,h,w} are macros and there are no equivalent macros for EVA. - * EVA unaligned access is handled in the ADE exception handler. - */ -#ifndef CONFIG_EVA -/* - * put_user_unaligned: - Write a simple value into user space. - * @x: Value to copy to user space. - * @ptr: Destination address, in user space. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * This macro copies a single simple value from kernel space to user - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and @x must be assignable - * to the result of dereferencing @ptr. - * - * Returns zero on success, or -EFAULT on error. - */ -#define put_user_unaligned(x,ptr) \ - __put_user_unaligned_check((x),(ptr),sizeof(*(ptr))) - -/* - * get_user_unaligned: - Get a simple variable from user space. - * @x: Variable to store result. - * @ptr: Source address, in user space. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * This macro copies a single simple variable from user space to kernel - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and the result of - * dereferencing @ptr must be assignable to @x without a cast. - * - * Returns zero on success, or -EFAULT on error. - * On error, the variable @x is set to zero. - */ -#define get_user_unaligned(x,ptr) \ - __get_user_unaligned_check((x),(ptr),sizeof(*(ptr))) - -/* - * __put_user_unaligned: - Write a simple value into user space, with less checking. - * @x: Value to copy to user space. - * @ptr: Destination address, in user space. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * This macro copies a single simple value from kernel space to user - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and @x must be assignable - * to the result of dereferencing @ptr. - * - * Caller must check the pointer with access_ok() before calling this - * function. - * - * Returns zero on success, or -EFAULT on error. - */ -#define __put_user_unaligned(x,ptr) \ - __put_user_unaligned_nocheck((x),(ptr),sizeof(*(ptr))) - -/* - * __get_user_unaligned: - Get a simple variable from user space, with less checking. - * @x: Variable to store result. - * @ptr: Source address, in user space. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * This macro copies a single simple variable from user space to kernel - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and the result of - * dereferencing @ptr must be assignable to @x without a cast. - * - * Caller must check the pointer with access_ok() before calling this - * function. - * - * Returns zero on success, or -EFAULT on error. - * On error, the variable @x is set to zero. - */ -#define __get_user_unaligned(x,ptr) \ - __get_user_unaligned_nocheck((x),(ptr),sizeof(*(ptr))) - -/* - * Yuck. We need two variants, one for 64bit operation and one - * for 32 bit mode and old iron. - */ -#ifdef CONFIG_32BIT -#define __GET_USER_UNALIGNED_DW(val, ptr) \ - __get_user_unaligned_asm_ll32(val, ptr) -#endif -#ifdef CONFIG_64BIT -#define __GET_USER_UNALIGNED_DW(val, ptr) \ - __get_user_unaligned_asm(val, "uld", ptr) -#endif - -extern void __get_user_unaligned_unknown(void); - -#define __get_user_unaligned_common(val, size, ptr) \ -do { \ - switch (size) { \ - case 1: __get_data_asm(val, "lb", ptr); break; \ - case 2: __get_data_unaligned_asm(val, "ulh", ptr); break; \ - case 4: __get_data_unaligned_asm(val, "ulw", ptr); break; \ - case 8: __GET_USER_UNALIGNED_DW(val, ptr); break; \ - default: __get_user_unaligned_unknown(); break; \ - } \ -} while (0) - -#define __get_user_unaligned_nocheck(x,ptr,size) \ -({ \ - int __gu_err; \ - \ - __get_user_unaligned_common((x), size, ptr); \ - __gu_err; \ -}) - -#define __get_user_unaligned_check(x,ptr,size) \ -({ \ - int __gu_err = -EFAULT; \ - const __typeof__(*(ptr)) __user * __gu_ptr = (ptr); \ - \ - if (likely(access_ok(VERIFY_READ, __gu_ptr, size))) \ - __get_user_unaligned_common((x), size, __gu_ptr); \ - \ - __gu_err; \ -}) - -#define __get_data_unaligned_asm(val, insn, addr) \ -{ \ - long __gu_tmp; \ - \ - __asm__ __volatile__( \ - "1: " insn " %1, %3 \n" \ - "2: \n" \ - " .insn \n" \ - " .section .fixup,\"ax\" \n" \ - "3: li %0, %4 \n" \ - " move %1, $0 \n" \ - " j 2b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " "__UA_ADDR "\t1b, 3b \n" \ - " "__UA_ADDR "\t1b + 4, 3b \n" \ - " .previous \n" \ - : "=r" (__gu_err), "=r" (__gu_tmp) \ - : "0" (0), "o" (__m(addr)), "i" (-EFAULT)); \ - \ - (val) = (__typeof__(*(addr))) __gu_tmp; \ -} - -/* - * Get a long long 64 using 32 bit registers. - */ -#define __get_user_unaligned_asm_ll32(val, addr) \ -{ \ - unsigned long long __gu_tmp; \ - \ - __asm__ __volatile__( \ - "1: ulw %1, (%3) \n" \ - "2: ulw %D1, 4(%3) \n" \ - " move %0, $0 \n" \ - "3: \n" \ - " .insn \n" \ - " .section .fixup,\"ax\" \n" \ - "4: li %0, %4 \n" \ - " move %1, $0 \n" \ - " move %D1, $0 \n" \ - " j 3b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " " __UA_ADDR " 1b, 4b \n" \ - " " __UA_ADDR " 1b + 4, 4b \n" \ - " " __UA_ADDR " 2b, 4b \n" \ - " " __UA_ADDR " 2b + 4, 4b \n" \ - " .previous \n" \ - : "=r" (__gu_err), "=&r" (__gu_tmp) \ - : "0" (0), "r" (addr), "i" (-EFAULT)); \ - (val) = (__typeof__(*(addr))) __gu_tmp; \ -} - -/* - * Yuck. We need two variants, one for 64bit operation and one - * for 32 bit mode and old iron. - */ -#ifdef CONFIG_32BIT -#define __PUT_USER_UNALIGNED_DW(ptr) __put_user_unaligned_asm_ll32(ptr) -#endif -#ifdef CONFIG_64BIT -#define __PUT_USER_UNALIGNED_DW(ptr) __put_user_unaligned_asm("usd", ptr) -#endif - -#define __put_user_unaligned_common(ptr, size) \ -do { \ - switch (size) { \ - case 1: __put_data_asm("sb", ptr); break; \ - case 2: __put_user_unaligned_asm("ush", ptr); break; \ - case 4: __put_user_unaligned_asm("usw", ptr); break; \ - case 8: __PUT_USER_UNALIGNED_DW(ptr); break; \ - default: __put_user_unaligned_unknown(); break; \ -} while (0) - -#define __put_user_unaligned_nocheck(x,ptr,size) \ -({ \ - __typeof__(*(ptr)) __pu_val; \ - int __pu_err = 0; \ - \ - __pu_val = (x); \ - __put_user_unaligned_common(ptr, size); \ - __pu_err; \ -}) - -#define __put_user_unaligned_check(x,ptr,size) \ -({ \ - __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ - __typeof__(*(ptr)) __pu_val = (x); \ - int __pu_err = -EFAULT; \ - \ - if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ - __put_user_unaligned_common(__pu_addr, size); \ - \ - __pu_err; \ -}) - -#define __put_user_unaligned_asm(insn, ptr) \ -{ \ - __asm__ __volatile__( \ - "1: " insn " %z2, %3 # __put_user_unaligned_asm\n" \ - "2: \n" \ - " .insn \n" \ - " .section .fixup,\"ax\" \n" \ - "3: li %0, %4 \n" \ - " j 2b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " " __UA_ADDR " 1b, 3b \n" \ - " .previous \n" \ - : "=r" (__pu_err) \ - : "0" (0), "Jr" (__pu_val), "o" (__m(ptr)), \ - "i" (-EFAULT)); \ -} - -#define __put_user_unaligned_asm_ll32(ptr) \ -{ \ - __asm__ __volatile__( \ - "1: sw %2, (%3) # __put_user_unaligned_asm_ll32 \n" \ - "2: sw %D2, 4(%3) \n" \ - "3: \n" \ - " .insn \n" \ - " .section .fixup,\"ax\" \n" \ - "4: li %0, %4 \n" \ - " j 3b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " " __UA_ADDR " 1b, 4b \n" \ - " " __UA_ADDR " 1b + 4, 4b \n" \ - " " __UA_ADDR " 2b, 4b \n" \ - " " __UA_ADDR " 2b + 4, 4b \n" \ - " .previous" \ - : "=r" (__pu_err) \ - : "0" (0), "r" (__pu_val), "r" (ptr), \ - "i" (-EFAULT)); \ -} - -extern void __put_user_unaligned_unknown(void); -#endif - -/* * We're generating jump to subroutines which will be outside the range of * jump instructions */ |