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 #ifndef SOFTMMU_SEMI_H 10 #define SOFTMMU_SEMI_H 1 11 12 static inline uint32_t softmmu_tget32(CPUArchState *env, uint32_t addr) 13 { 14 uint32_t val; 15 16 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 4, 0); 17 return tswap32(val); 18 } 19 static inline uint32_t softmmu_tget8(CPUArchState *env, uint32_t addr) 20 { 21 uint8_t val; 22 23 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, &val, 1, 0); 24 return val; 25 } 26 27 #define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; }) 28 #define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; }) 29 #define get_user_ual(arg, p) get_user_u32(arg, p) 30 31 static inline void softmmu_tput32(CPUArchState *env, uint32_t addr, uint32_t val) 32 { 33 val = tswap32(val); 34 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 4, 1); 35 } 36 #define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; }) 37 #define put_user_ual(arg, p) put_user_u32(arg, p) 38 39 static void *softmmu_lock_user(CPUArchState *env, uint32_t addr, uint32_t len, 40 int copy) 41 { 42 uint8_t *p; 43 /* TODO: Make this something that isn't fixed size. */ 44 p = malloc(len); 45 if (p && copy) { 46 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, p, len, 0); 47 } 48 return p; 49 } 50 #define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy) 51 static char *softmmu_lock_user_string(CPUArchState *env, uint32_t addr) 52 { 53 char *p; 54 char *s; 55 uint8_t c; 56 /* TODO: Make this something that isn't fixed size. */ 57 s = p = malloc(1024); 58 if (!s) { 59 return NULL; 60 } 61 do { 62 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, &c, 1, 0); 63 addr++; 64 *(p++) = c; 65 } while (c); 66 return s; 67 } 68 #define lock_user_string(p) softmmu_lock_user_string(env, p) 69 static void softmmu_unlock_user(CPUArchState *env, void *p, target_ulong addr, 70 target_ulong len) 71 { 72 if (len) { 73 cpu_memory_rw_debug(ENV_GET_CPU(env), addr, p, len, 1); 74 } 75 free(p); 76 } 77 #define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len) 78 79 #endif 80