include/exec/softmmu-semi.h

   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 SOFTMMU_SEMI_H
  11 #define SOFTMMU_SEMI_H
  12
  13 static inline uint64_t softmmu_tget64(CPUArchState *env, target_ulong addr)
  14 {
  15     uint64_t val;
  16
  17     cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 8, 0);
  18     return tswap64(val);
  19 }
  20
  21 static inline uint32_t softmmu_tget32(CPUArchState *env, target_ulong addr)
  22 {
  23     uint32_t val;
  24
  25     cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 4, 0);
  26     return tswap32(val);
  27 }
  28
  29 static inline uint32_t softmmu_tget8(CPUArchState *env, target_ulong addr)
  30 {
  31     uint8_t val;
  32
  33     cpu_memory_rw_debug(ENV_GET_CPU(env), addr, &val, 1, 0);
  34     return val;
  35 }
  36
  37 #define get_user_u64(arg, p) ({ arg = softmmu_tget64(env, p); 0; })
  38 #define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; })
  39 #define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; })
  40 #define get_user_ual(arg, p) get_user_u32(arg, p)
  41
  42 static inline void softmmu_tput64(CPUArchState *env,
  43                                   target_ulong addr, uint64_t val)
  44 {
  45     val = tswap64(val);
  46     cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 8, 1);
  47 }
  48
  49 static inline void softmmu_tput32(CPUArchState *env,
  50                                   target_ulong addr, uint32_t val)
  51 {
  52     val = tswap32(val);
  53     cpu_memory_rw_debug(ENV_GET_CPU(env), addr, (uint8_t *)&val, 4, 1);
  54 }
  55 #define put_user_u64(arg, p) ({ softmmu_tput64(env, p, arg) ; 0; })
  56 #define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; })
  57 #define put_user_ual(arg, p) put_user_u32(arg, p)
  58
  59 static void *softmmu_lock_user(CPUArchState *env,
  60                                target_ulong addr, target_ulong len, int copy)
  61 {
  62     uint8_t *p;
  63     /* TODO: Make this something that isn't fixed size.  */
  64     p = malloc(len);
  65     if (p && copy) {
  66         cpu_memory_rw_debug(ENV_GET_CPU(env), addr, p, len, 0);
  67     }
  68     return p;
  69 }
  70 #define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
  71 static char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr)
  72 {
  73     char *p;
  74     char *s;
  75     uint8_t c;
  76     /* TODO: Make this something that isn't fixed size.  */
  77     s = p = malloc(1024);
  78     if (!s) {
  79         return NULL;
  80     }
  81     do {
  82         cpu_memory_rw_debug(ENV_GET_CPU(env), addr, &c, 1, 0);
  83         addr++;
  84         *(p++) = c;
  85     } while (c);
  86     return s;
  87 }
  88 #define lock_user_string(p) softmmu_lock_user_string(env, p)
  89 static void softmmu_unlock_user(CPUArchState *env, void *p, target_ulong addr,
  90                                 target_ulong len)
  91 {
  92     if (len) {
  93         cpu_memory_rw_debug(ENV_GET_CPU(env), addr, p, len, 1);
  94     }
  95     free(p);
  96 }
  97 #define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
  98
  99 #endif