1 /* 2 * QEMU page protection definitions. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * SPDX-License-Identifier: LGPL-2.1+ 7 */ 8 #ifndef EXEC_PAGE_PROT_COMMON_H 9 #define EXEC_PAGE_PROT_COMMON_H 10 11 /* same as PROT_xxx */ 12 #define PAGE_READ 0x0001 13 #define PAGE_WRITE 0x0002 14 #define PAGE_EXEC 0x0004 15 #define PAGE_RWX (PAGE_READ | PAGE_WRITE | PAGE_EXEC) 16 #define PAGE_VALID 0x0008 17 /* 18 * Original state of the write flag (used when tracking self-modifying code) 19 */ 20 #define PAGE_WRITE_ORG 0x0010 21 /* 22 * Invalidate the TLB entry immediately, helpful for s390x 23 * Low-Address-Protection. Used with PAGE_WRITE in tlb_set_page_with_attrs() 24 */ 25 #define PAGE_WRITE_INV 0x0020 26 /* For use with page_set_flags: page is being replaced; target_data cleared. */ 27 #define PAGE_RESET 0x0040 28 /* For linux-user, indicates that the page is MAP_ANON. */ 29 #define PAGE_ANON 0x0080 30 31 /* Target-specific bits that will be used via page_get_flags(). */ 32 #define PAGE_TARGET_1 0x0200 33 #define PAGE_TARGET_2 0x0400 34 35 /* 36 * For linux-user, indicates that the page is mapped with the same semantics 37 * in both guest and host. 38 */ 39 #define PAGE_PASSTHROUGH 0x0800 40 41 #ifdef CONFIG_USER_ONLY 42 43 void TSA_NO_TSA mmap_lock(void); 44 void TSA_NO_TSA mmap_unlock(void); 45 bool have_mmap_lock(void); 46 47 static inline void mmap_unlock_guard(void *unused) 48 { 49 mmap_unlock(); 50 } 51 52 #define WITH_MMAP_LOCK_GUARD() \ 53 for (int _mmap_lock_iter __attribute__((cleanup(mmap_unlock_guard))) \ 54 = (mmap_lock(), 0); _mmap_lock_iter == 0; _mmap_lock_iter = 1) 55 #else 56 57 static inline void mmap_lock(void) {} 58 static inline void mmap_unlock(void) {} 59 #define WITH_MMAP_LOCK_GUARD() 60 61 #endif /* !CONFIG_USER_ONLY */ 62 63 #endif 64