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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/x86/include/asm/mpx.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef _ASM_X86_MPX_H #define _ASM_X86_MPX_H #include <linux/types.h> #include <linux/mm_types.h> #include <asm/ptrace.h> #include <asm/insn.h> / * NULL is theoretically a valid place to put the bounds * directory, so point this at an invalid address. / #define MPX_INVALID_BOUNDS_DIR ((void __user )-1) #define MPX_BNDCFG_ENABLE_FLAG 0x1 #define MPX_BD_ENTRY_VALID_FLAG 0x1 /* * The upper 28 bits [47:20] of the virtual address in 64-bit * are used to index into bounds directory (BD). * * The directory is 2G (2^31) in size, and with 8-byte entries * it has 2^28 entries. / #define MPX_BD_SIZE_BYTES_64 (1UL<<31) #define MPX_BD_ENTRY_BYTES_64 8 #define MPX_BD_NR_ENTRIES_64 (MPX_BD_SIZE_BYTES_64/MPX_BD_ENTRY_BYTES_64) / * The 32-bit directory is 4MB (2^22) in size, and with 4-byte * entries it has 2^20 entries. / #define MPX_BD_SIZE_BYTES_32 (1UL<<22) #define MPX_BD_ENTRY_BYTES_32 4 #define MPX_BD_NR_ENTRIES_32 (MPX_BD_SIZE_BYTES_32/MPX_BD_ENTRY_BYTES_32) / * A 64-bit table is 4MB total in size, and an entry is * 4 64-bit pointers in size. / #define MPX_BT_SIZE_BYTES_64 (1UL<<22) #define MPX_BT_ENTRY_BYTES_64 32 #define MPX_BT_NR_ENTRIES_64 (MPX_BT_SIZE_BYTES_64/MPX_BT_ENTRY_BYTES_64) / * A 32-bit table is 16kB total in size, and an entry is * 4 32-bit pointers in size. / #define MPX_BT_SIZE_BYTES_32 (1UL<<14) #define MPX_BT_ENTRY_BYTES_32 16 #define MPX_BT_NR_ENTRIES_32 (MPX_BT_SIZE_BYTES_32/MPX_BT_ENTRY_BYTES_32) #define MPX_BNDSTA_TAIL 2 #define MPX_BNDCFG_TAIL 12 #define MPX_BNDSTA_ADDR_MASK (~((1UL<<MPX_BNDSTA_TAIL)-1)) #define MPX_BNDCFG_ADDR_MASK (~((1UL<<MPX_BNDCFG_TAIL)-1)) #define MPX_BNDSTA_ERROR_CODE 0x3 struct mpx_fault_info { void __user addr; void __user lower; void __user upper; }; #ifdef CONFIG_X86_INTEL_MPX extern int mpx_fault_info(struct mpx_fault_info info, struct pt_regs regs); extern int mpx_handle_bd_fault(void); static inline int kernel_managing_mpx_tables(struct mm_struct mm) { return (mm->context.bd_addr != MPX_INVALID_BOUNDS_DIR); } static inline void mpx_mm_init(struct mm_struct mm) { /* * NULL is theoretically a valid place to put the bounds * directory, so point this at an invalid address. / mm->context.bd_addr = MPX_INVALID_BOUNDS_DIR; } extern void mpx_notify_unmap(struct mm_struct mm, unsigned long start, unsigned long end); extern unsigned long mpx_unmapped_area_check(unsigned long addr, unsigned long len, unsigned long flags); #else static inline int mpx_fault_info(struct mpx_fault_info info, struct pt_regs regs) { return -EINVAL; } static inline int mpx_handle_bd_fault(void) { return -EINVAL; } static inline int kernel_managing_mpx_tables(struct mm_struct mm) { return 0; } static inline void mpx_mm_init(struct mm_struct mm) { } static inline void mpx_notify_unmap(struct mm_struct mm, unsigned long start, unsigned long end) { } static inline unsigned long mpx_unmapped_area_check(unsigned long addr, unsigned long len, unsigned long flags) { return addr; } #endif / CONFIG_X86_INTEL_MPX / #endif / _ASM_X86_MPX_H */

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