Edit File: mpx.h
#ifndef _ASM_X86_MPX_H #define _ASM_X86_MPX_H #include <linux/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 #ifdef CONFIG_X86_INTEL_MPX siginfo_t *mpx_generate_siginfo(struct pt_regs *regs); int mpx_handle_bd_fault(void); static inline int kernel_managing_mpx_tables(struct mm_struct *mm) { return (mm->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->bd_addr = MPX_INVALID_BOUNDS_DIR; } void mpx_notify_unmap(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long start, unsigned long end); #else static inline siginfo_t *mpx_generate_siginfo(struct pt_regs *regs) { return NULL; } 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, struct vm_area_struct *vma, unsigned long start, unsigned long end) { } #endif /* CONFIG_X86_INTEL_MPX */ #endif /* _ASM_X86_MPX_H */