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Diffstat (limited to 'arch/m32r/lib/usercopy.c')
-rw-r--r--arch/m32r/lib/usercopy.c362
1 files changed, 0 insertions, 362 deletions
diff --git a/arch/m32r/lib/usercopy.c b/arch/m32r/lib/usercopy.c
deleted file mode 100644
index 0892a4341b3a..000000000000
--- a/arch/m32r/lib/usercopy.c
+++ /dev/null
@@ -1,362 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * User address space access functions.
- * The non inlined parts of asm-m32r/uaccess.h are here.
- *
- * Copyright 1997 Andi Kleen <ak@muc.de>
- * Copyright 1997 Linus Torvalds
- * Copyright 2001, 2002, 2004 Hirokazu Takata
- */
-#include <linux/prefetch.h>
-#include <linux/string.h>
-#include <linux/thread_info.h>
-#include <linux/uaccess.h>
-
-/*
- * Copy a null terminated string from userspace.
- */
-
-#ifdef CONFIG_ISA_DUAL_ISSUE
-
-#define __do_strncpy_from_user(dst,src,count,res) \
-do { \
- int __d0, __d1, __d2; \
- __asm__ __volatile__( \
- " beqz %1, 2f\n" \
- " .fillinsn\n" \
- "0: ldb r14, @%3 || addi %3, #1\n" \
- " stb r14, @%4 || addi %4, #1\n" \
- " beqz r14, 1f\n" \
- " addi %1, #-1\n" \
- " bnez %1, 0b\n" \
- " .fillinsn\n" \
- "1: sub %0, %1\n" \
- " .fillinsn\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "3: seth r14, #high(2b)\n" \
- " or3 r14, r14, #low(2b)\n" \
- " jmp r14 || ldi %0, #%5\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- ".previous" \
- : "=&r"(res), "=&r"(count), "=&r" (__d0), "=&r" (__d1), \
- "=&r" (__d2) \
- : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), \
- "4"(dst) \
- : "r14", "cbit", "memory"); \
-} while (0)
-
-#else /* not CONFIG_ISA_DUAL_ISSUE */
-
-#define __do_strncpy_from_user(dst,src,count,res) \
-do { \
- int __d0, __d1, __d2; \
- __asm__ __volatile__( \
- " beqz %1, 2f\n" \
- " .fillinsn\n" \
- "0: ldb r14, @%3\n" \
- " stb r14, @%4\n" \
- " addi %3, #1\n" \
- " addi %4, #1\n" \
- " beqz r14, 1f\n" \
- " addi %1, #-1\n" \
- " bnez %1, 0b\n" \
- " .fillinsn\n" \
- "1: sub %0, %1\n" \
- " .fillinsn\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "3: ldi %0, #%5\n" \
- " seth r14, #high(2b)\n" \
- " or3 r14, r14, #low(2b)\n" \
- " jmp r14\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- ".previous" \
- : "=&r"(res), "=&r"(count), "=&r" (__d0), "=&r" (__d1), \
- "=&r" (__d2) \
- : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), \
- "4"(dst) \
- : "r14", "cbit", "memory"); \
-} while (0)
-
-#endif /* CONFIG_ISA_DUAL_ISSUE */
-
-long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-
-/*
- * Zero Userspace
- */
-
-#ifdef CONFIG_ISA_DUAL_ISSUE
-
-#define __do_clear_user(addr,size) \
-do { \
- int __dst, __c; \
- __asm__ __volatile__( \
- " beqz %1, 9f\n" \
- " and3 r14, %0, #3\n" \
- " bnez r14, 2f\n" \
- " and3 r14, %1, #3\n" \
- " bnez r14, 2f\n" \
- " and3 %1, %1, #3\n" \
- " beqz %2, 2f\n" \
- " addi %0, #-4\n" \
- " .fillinsn\n" \
- "0: ; word clear \n" \
- " st %6, @+%0 || addi %2, #-1\n" \
- " bnez %2, 0b\n" \
- " beqz %1, 9f\n" \
- " .fillinsn\n" \
- "2: ; byte clear \n" \
- " stb %6, @%0 || addi %1, #-1\n" \
- " addi %0, #1\n" \
- " bnez %1, 2b\n" \
- " .fillinsn\n" \
- "9:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "4: slli %2, #2\n" \
- " seth r14, #high(9b)\n" \
- " or3 r14, r14, #low(9b)\n" \
- " jmp r14 || add %1, %2\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,4b\n" \
- " .long 2b,9b\n" \
- ".previous\n" \
- : "=&r"(__dst), "=&r"(size), "=&r"(__c) \
- : "0"(addr), "1"(size), "2"(size / 4), "r"(0) \
- : "r14", "cbit", "memory"); \
-} while (0)
-
-#else /* not CONFIG_ISA_DUAL_ISSUE */
-
-#define __do_clear_user(addr,size) \
-do { \
- int __dst, __c; \
- __asm__ __volatile__( \
- " beqz %1, 9f\n" \
- " and3 r14, %0, #3\n" \
- " bnez r14, 2f\n" \
- " and3 r14, %1, #3\n" \
- " bnez r14, 2f\n" \
- " and3 %1, %1, #3\n" \
- " beqz %2, 2f\n" \
- " addi %0, #-4\n" \
- " .fillinsn\n" \
- "0: st %6, @+%0 ; word clear \n" \
- " addi %2, #-1\n" \
- " bnez %2, 0b\n" \
- " beqz %1, 9f\n" \
- " .fillinsn\n" \
- "2: stb %6, @%0 ; byte clear \n" \
- " addi %1, #-1\n" \
- " addi %0, #1\n" \
- " bnez %1, 2b\n" \
- " .fillinsn\n" \
- "9:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "4: slli %2, #2\n" \
- " add %1, %2\n" \
- " seth r14, #high(9b)\n" \
- " or3 r14, r14, #low(9b)\n" \
- " jmp r14\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,4b\n" \
- " .long 2b,9b\n" \
- ".previous\n" \
- : "=&r"(__dst), "=&r"(size), "=&r"(__c) \
- : "0"(addr), "1"(size), "2"(size / 4), "r"(0) \
- : "r14", "cbit", "memory"); \
-} while (0)
-
-#endif /* not CONFIG_ISA_DUAL_ISSUE */
-
-unsigned long
-clear_user(void __user *to, unsigned long n)
-{
- if (access_ok(VERIFY_WRITE, to, n))
- __do_clear_user(to, n);
- return n;
-}
-
-unsigned long
-__clear_user(void __user *to, unsigned long n)
-{
- __do_clear_user(to, n);
- return n;
-}
-
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-
-#ifdef CONFIG_ISA_DUAL_ISSUE
-
-long strnlen_user(const char __user *s, long n)
-{
- unsigned long mask = -__addr_ok(s);
- unsigned long res;
-
- __asm__ __volatile__(
- " and %0, %5 || mv r1, %1\n"
- " beqz %0, strnlen_exit\n"
- " and3 r0, %1, #3\n"
- " bnez r0, strnlen_byte_loop\n"
- " cmpui %0, #4\n"
- " bc strnlen_byte_loop\n"
- "strnlen_word_loop:\n"
- "0: ld r0, @%1+\n"
- " pcmpbz r0\n"
- " bc strnlen_last_bytes_fixup\n"
- " addi %0, #-4\n"
- " beqz %0, strnlen_exit\n"
- " bgtz %0, strnlen_word_loop\n"
- "strnlen_last_bytes:\n"
- " mv %0, %4\n"
- "strnlen_last_bytes_fixup:\n"
- " addi %1, #-4\n"
- "strnlen_byte_loop:\n"
- "1: ldb r0, @%1 || addi %0, #-1\n"
- " beqz r0, strnlen_exit\n"
- " addi %1, #1\n"
- " bnez %0, strnlen_byte_loop\n"
- "strnlen_exit:\n"
- " sub %1, r1\n"
- " add3 %0, %1, #1\n"
- " .fillinsn\n"
- "9:\n"
- ".section .fixup,\"ax\"\n"
- " .balign 4\n"
- "4: addi %1, #-4\n"
- " .fillinsn\n"
- "5: seth r1, #high(9b)\n"
- " or3 r1, r1, #low(9b)\n"
- " jmp r1 || ldi %0, #0\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .balign 4\n"
- " .long 0b,4b\n"
- " .long 1b,5b\n"
- ".previous"
- : "=&r" (res), "=r" (s)
- : "0" (n), "1" (s), "r" (n & 3), "r" (mask), "r"(0x01010101)
- : "r0", "r1", "cbit");
-
- /* NOTE: strnlen_user() algorithm:
- * {
- * char *p;
- * for (p = s; n-- && *p != '\0'; ++p)
- * ;
- * return p - s + 1;
- * }
- */
-
- /* NOTE: If a null char. exists, return 0.
- * if ((x - 0x01010101) & ~x & 0x80808080)\n"
- * return 0;\n"
- */
-
- return res & mask;
-}
-
-#else /* not CONFIG_ISA_DUAL_ISSUE */
-
-long strnlen_user(const char __user *s, long n)
-{
- unsigned long mask = -__addr_ok(s);
- unsigned long res;
-
- __asm__ __volatile__(
- " and %0, %5\n"
- " mv r1, %1\n"
- " beqz %0, strnlen_exit\n"
- " and3 r0, %1, #3\n"
- " bnez r0, strnlen_byte_loop\n"
- " cmpui %0, #4\n"
- " bc strnlen_byte_loop\n"
- " sll3 r3, %6, #7\n"
- "strnlen_word_loop:\n"
- "0: ld r0, @%1+\n"
- " not r2, r0\n"
- " sub r0, %6\n"
- " and r2, r3\n"
- " and r2, r0\n"
- " bnez r2, strnlen_last_bytes_fixup\n"
- " addi %0, #-4\n"
- " beqz %0, strnlen_exit\n"
- " bgtz %0, strnlen_word_loop\n"
- "strnlen_last_bytes:\n"
- " mv %0, %4\n"
- "strnlen_last_bytes_fixup:\n"
- " addi %1, #-4\n"
- "strnlen_byte_loop:\n"
- "1: ldb r0, @%1\n"
- " addi %0, #-1\n"
- " beqz r0, strnlen_exit\n"
- " addi %1, #1\n"
- " bnez %0, strnlen_byte_loop\n"
- "strnlen_exit:\n"
- " sub %1, r1\n"
- " add3 %0, %1, #1\n"
- " .fillinsn\n"
- "9:\n"
- ".section .fixup,\"ax\"\n"
- " .balign 4\n"
- "4: addi %1, #-4\n"
- " .fillinsn\n"
- "5: ldi %0, #0\n"
- " seth r1, #high(9b)\n"
- " or3 r1, r1, #low(9b)\n"
- " jmp r1\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .balign 4\n"
- " .long 0b,4b\n"
- " .long 1b,5b\n"
- ".previous"
- : "=&r" (res), "=r" (s)
- : "0" (n), "1" (s), "r" (n & 3), "r" (mask), "r"(0x01010101)
- : "r0", "r1", "r2", "r3", "cbit");
-
- /* NOTE: strnlen_user() algorithm:
- * {
- * char *p;
- * for (p = s; n-- && *p != '\0'; ++p)
- * ;
- * return p - s + 1;
- * }
- */
-
- /* NOTE: If a null char. exists, return 0.
- * if ((x - 0x01010101) & ~x & 0x80808080)\n"
- * return 0;\n"
- */
-
- return res & mask;
-}
-
-#endif /* CONFIG_ISA_DUAL_ISSUE */
-
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