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      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