mirror of
https://github.com/torvalds/linux
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d6a428fb58
__clear_user() (and clear_user() which uses it), always access the user mode address space, which results in EVA store instructions when EVA is enabled even if the current user address limit is KERNEL_DS. Fix this by adding a new symbol __bzero_kernel for the normal kernel address space bzero in EVA mode, and call that from __clear_user() if eva_kernel_access(). Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10844/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* Export MIPS-specific functions needed for loadable modules.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 97, 98, 99, 2000, 01, 03, 04, 05, 12 by Ralf Baechle
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* Copyright (C) 1999, 2000, 01 Silicon Graphics, Inc.
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*/
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#include <linux/interrupt.h>
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#include <linux/export.h>
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#include <asm/checksum.h>
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#include <linux/mm.h>
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#include <asm/uaccess.h>
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#include <asm/ftrace.h>
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#include <asm/fpu.h>
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#include <asm/msa.h>
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extern void *__bzero_kernel(void *__s, size_t __count);
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extern void *__bzero(void *__s, size_t __count);
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extern long __strncpy_from_kernel_nocheck_asm(char *__to,
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const char *__from, long __len);
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extern long __strncpy_from_kernel_asm(char *__to, const char *__from,
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long __len);
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extern long __strncpy_from_user_nocheck_asm(char *__to,
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const char *__from, long __len);
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extern long __strncpy_from_user_asm(char *__to, const char *__from,
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long __len);
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extern long __strlen_kernel_asm(const char *s);
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extern long __strlen_user_asm(const char *s);
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extern long __strnlen_kernel_nocheck_asm(const char *s);
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extern long __strnlen_kernel_asm(const char *s);
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extern long __strnlen_user_nocheck_asm(const char *s);
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extern long __strnlen_user_asm(const char *s);
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/*
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* Core architecture code
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*/
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EXPORT_SYMBOL_GPL(_save_fp);
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#ifdef CONFIG_CPU_HAS_MSA
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EXPORT_SYMBOL_GPL(_save_msa);
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#endif
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/*
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* String functions
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*/
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EXPORT_SYMBOL(memset);
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(memmove);
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/*
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* Functions that operate on entire pages. Mostly used by memory management.
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*/
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EXPORT_SYMBOL(clear_page);
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EXPORT_SYMBOL(copy_page);
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/*
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* Userspace access stuff.
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*/
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EXPORT_SYMBOL(__copy_user);
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EXPORT_SYMBOL(__copy_user_inatomic);
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#ifdef CONFIG_EVA
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EXPORT_SYMBOL(__copy_from_user_eva);
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EXPORT_SYMBOL(__copy_in_user_eva);
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EXPORT_SYMBOL(__copy_to_user_eva);
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EXPORT_SYMBOL(__copy_user_inatomic_eva);
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EXPORT_SYMBOL(__bzero_kernel);
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#endif
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EXPORT_SYMBOL(__bzero);
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EXPORT_SYMBOL(__strncpy_from_kernel_nocheck_asm);
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EXPORT_SYMBOL(__strncpy_from_kernel_asm);
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EXPORT_SYMBOL(__strncpy_from_user_nocheck_asm);
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EXPORT_SYMBOL(__strncpy_from_user_asm);
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EXPORT_SYMBOL(__strlen_kernel_asm);
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EXPORT_SYMBOL(__strlen_user_asm);
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EXPORT_SYMBOL(__strnlen_kernel_nocheck_asm);
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EXPORT_SYMBOL(__strnlen_kernel_asm);
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EXPORT_SYMBOL(__strnlen_user_nocheck_asm);
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EXPORT_SYMBOL(__strnlen_user_asm);
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#ifndef CONFIG_CPU_MIPSR6
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EXPORT_SYMBOL(csum_partial);
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EXPORT_SYMBOL(csum_partial_copy_nocheck);
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EXPORT_SYMBOL(__csum_partial_copy_kernel);
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EXPORT_SYMBOL(__csum_partial_copy_to_user);
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EXPORT_SYMBOL(__csum_partial_copy_from_user);
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#endif
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EXPORT_SYMBOL(invalid_pte_table);
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#ifdef CONFIG_FUNCTION_TRACER
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/* _mcount is defined in arch/mips/kernel/mcount.S */
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EXPORT_SYMBOL(_mcount);
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#endif
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