1 /* 2 * Helper routines to provide target memory access for semihosting 3 * syscalls in system emulation mode. 4 * 5 * Copyright (c) 2007 CodeSourcery. 6 * 7 * This code is licensed under the GPL 8 */ 9 10 #ifndef SEMIHOSTING_UACCESS_H 11 #define SEMIHOSTING_UACCESS_H 12 13 #ifdef CONFIG_USER_ONLY 14 #error Cannot include semihosting/uaccess.h from user emulation 15 #endif 16 17 #include "exec/cpu-common.h" 18 #include "exec/cpu-defs.h" 19 #include "exec/tswap.h" 20 #include "exec/page-protection.h" 21 22 /** 23 * get_user_u64: 24 * 25 * Returns: 0 on success, -1 on error. 26 */ 27 #define get_user_u64(val, addr) \ 28 ({ uint64_t val_ = 0; \ 29 int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \ 30 &val_, sizeof(val_), 0); \ 31 (val) = tswap64(val_); ret_; }) 32 33 /** 34 * get_user_u32: 35 * 36 * Returns: 0 on success, -1 on error. 37 */ 38 #define get_user_u32(val, addr) \ 39 ({ uint32_t val_ = 0; \ 40 int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \ 41 &val_, sizeof(val_), 0); \ 42 (val) = tswap32(val_); ret_; }) 43 44 /** 45 * get_user_u8: 46 * 47 * Returns: 0 on success, -1 on error. 48 */ 49 #define get_user_u8(val, addr) \ 50 ({ uint8_t val_ = 0; \ 51 int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \ 52 &val_, sizeof(val_), 0); \ 53 (val) = val_; ret_; }) 54 55 /** 56 * get_user_ual: 57 * 58 * Returns: 0 on success, -1 on error. 59 */ 60 #define get_user_ual(arg, p) get_user_u32(arg, p) 61 62 /** 63 * put_user_u64: 64 * 65 * Returns: 0 on success, -1 on error. 66 */ 67 #define put_user_u64(val, addr) \ 68 ({ uint64_t val_ = tswap64(val); \ 69 cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); }) 70 71 /** 72 * put_user_u32: 73 * 74 * Returns: 0 on success, -1 on error. 75 */ 76 #define put_user_u32(val, addr) \ 77 ({ uint32_t val_ = tswap32(val); \ 78 cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); }) 79 80 /** 81 * put_user_ual: 82 * 83 * Returns: 0 on success, -1 on error. 84 */ 85 #define put_user_ual(arg, p) put_user_u32(arg, p) 86 87 /** 88 * uaccess_lock_user: 89 * 90 * The returned pointer should be freed using uaccess_unlock_user(). 91 */ 92 void *uaccess_lock_user(CPUArchState *env, target_ulong addr, 93 target_ulong len, bool copy); 94 /** 95 * lock_user: 96 * 97 * The returned pointer should be freed using unlock_user(). 98 */ 99 #define lock_user(type, p, len, copy) uaccess_lock_user(env, p, len, copy) 100 101 /** 102 * uaccess_lock_user_string: 103 * 104 * The returned string should be freed using uaccess_unlock_user(). 105 */ 106 char *uaccess_lock_user_string(CPUArchState *env, target_ulong addr); 107 /** 108 * uaccess_lock_user_string: 109 * 110 * The returned string should be freed using unlock_user(). 111 */ 112 #define lock_user_string(p) uaccess_lock_user_string(env, p) 113 114 void uaccess_unlock_user(CPUArchState *env, void *p, 115 target_ulong addr, target_ulong len); 116 #define unlock_user(s, args, len) uaccess_unlock_user(env, s, args, len) 117 118 ssize_t uaccess_strlen_user(CPUArchState *env, target_ulong addr); 119 #define target_strlen(p) uaccess_strlen_user(env, p) 120 121 #endif /* SEMIHOSTING_SOFTMMU_UACCESS_H */ 122