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