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
  10 #ifndef SOFTMMU_SEMI_H
  11 #define SOFTMMU_SEMI_H
  12
  13 #include "cpu.h"
  14
  15 static inline uint64_t softmmu_tget64(CPUArchState *env, target_ulong addr)
  16 {
  17     uint64_t val;
  18
  19     cpu_memory_rw_debug(env_cpu(env), addr, (uint8_t *)&val, 8, 0);
  20     return tswap64(val);
  21 }
  22
  23 static inline uint32_t softmmu_tget32(CPUArchState *env, target_ulong addr)
  24 {
  25     uint32_t val;
  26
  27     cpu_memory_rw_debug(env_cpu(env), addr, (uint8_t *)&val, 4, 0);
  28     return tswap32(val);
  29 }
  30
  31 static inline uint32_t softmmu_tget8(CPUArchState *env, target_ulong addr)
  32 {
  33     uint8_t val;
  34
  35     cpu_memory_rw_debug(env_cpu(env), addr, &val, 1, 0);
  36     return val;
  37 }
  38
  39 #define get_user_u64(arg, p) ({ arg = softmmu_tget64(env, p); 0; })
  40 #define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; })
  41 #define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; })
  42 #define get_user_ual(arg, p) get_user_u32(arg, p)
  43
  44 static inline void softmmu_tput64(CPUArchState *env,
  45                                   target_ulong addr, uint64_t val)
  46 {
  47     val = tswap64(val);
  48     cpu_memory_rw_debug(env_cpu(env), addr, (uint8_t *)&val, 8, 1);
  49 }
  50
  51 static inline void softmmu_tput32(CPUArchState *env,
  52                                   target_ulong addr, uint32_t val)
  53 {
  54     val = tswap32(val);
  55     cpu_memory_rw_debug(env_cpu(env), addr, (uint8_t *)&val, 4, 1);
  56 }
  57 #define put_user_u64(arg, p) ({ softmmu_tput64(env, p, arg) ; 0; })
  58 #define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; })
  59 #define put_user_ual(arg, p) put_user_u32(arg, p)
  60
  61 static void *softmmu_lock_user(CPUArchState *env,
  62                                target_ulong addr, target_ulong len, int copy)
  63 {
  64     uint8_t *p;
  65     /* TODO: Make this something that isn't fixed size.  */
  66     p = malloc(len);
  67     if (p && copy) {
  68         cpu_memory_rw_debug(env_cpu(env), addr, p, len, 0);
  69     }
  70     return p;
  71 }
  72 #define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
  73 static char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr)
  74 {
  75     char *p;
  76     char *s;
  77     uint8_t c;
  78     /* TODO: Make this something that isn't fixed size.  */
  79     s = p = malloc(1024);
  80     if (!s) {
  81         return NULL;
  82     }
  83     do {
  84         cpu_memory_rw_debug(env_cpu(env), addr, &c, 1, 0);
  85         addr++;
  86         *(p++) = c;
  87     } while (c);
  88     return s;
  89 }
  90 #define lock_user_string(p) softmmu_lock_user_string(env, p)
  91 static void softmmu_unlock_user(CPUArchState *env, void *p, target_ulong addr,
  92                                 target_ulong len)
  93 {
  94     if (len) {
  95         cpu_memory_rw_debug(env_cpu(env), addr, p, len, 1);
  96     }
  97     free(p);
  98 }
  99 #define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
 100
 101 #endif