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 uint32_t softmmu_tget32(CPUArchState *env, uint32_t addr)
  13{
  14    uint32_t val;
  15
  16    cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0);
  17    return tswap32(val);
  18}
  19static inline uint32_t softmmu_tget8(CPUArchState *env, uint32_t addr)
  20{
  21    uint8_t val;
  22
  23    cpu_memory_rw_debug(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
  31static inline void softmmu_tput32(CPUArchState *env, uint32_t addr, uint32_t val)
  32{
  33    val = tswap32(val);
  34    cpu_memory_rw_debug(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
  39static 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, addr, p, len, 0);
  47    return p;
  48}
  49#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
  50static char *softmmu_lock_user_string(CPUArchState *env, uint32_t addr)
  51{
  52    char *p;
  53    char *s;
  54    uint8_t c;
  55    /* TODO: Make this something that isn't fixed size.  */
  56    s = p = malloc(1024);
  57    if (!s) {
  58        return NULL;
  59    }
  60    do {
  61        cpu_memory_rw_debug(env, addr, &c, 1, 0);
  62        addr++;
  63        *(p++) = c;
  64    } while (c);
  65    return s;
  66}
  67#define lock_user_string(p) softmmu_lock_user_string(env, p)
  68static void softmmu_unlock_user(CPUArchState *env, void *p, target_ulong addr,
  69                                target_ulong len)
  70{
  71    if (len)
  72        cpu_memory_rw_debug(env, addr, p, len, 1);
  73    free(p);
  74}
  75#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
  76
  77#endif
  78