LXR qemu/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
  12static 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
  20static 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
  28static 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
  41static 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
  48static 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
  58static 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)
  70static 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)
  88static 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
  99