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