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