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, 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