include/semihosting/uaccess.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 SEMIHOSTING_UACCESS_H
  11 #define SEMIHOSTING_UACCESS_H
  12
  13 #ifdef CONFIG_USER_ONLY
  14 #error Cannot include semihosting/uaccess.h from user emulation
  15 #endif
  16
  17 #include "cpu.h"
  18
  19 #define get_user_u64(val, addr)                                         \
  20     ({ uint64_t val_ = 0;                                               \
  21        int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
  22                                       &val_, sizeof(val_), 0);          \
  23        (val) = tswap64(val_); ret_; })
  24
  25 #define get_user_u32(val, addr)                                         \
  26     ({ uint32_t val_ = 0;                                               \
  27        int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
  28                                       &val_, sizeof(val_), 0);          \
  29        (val) = tswap32(val_); ret_; })
  30
  31 #define get_user_u8(val, addr)                                          \
  32     ({ uint8_t val_ = 0;                                                \
  33        int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
  34                                       &val_, sizeof(val_), 0);          \
  35        (val) = val_; ret_; })
  36
  37 #define get_user_ual(arg, p) get_user_u32(arg, p)
  38
  39 #define put_user_u64(val, addr)                                         \
  40     ({ uint64_t val_ = tswap64(val);                                    \
  41        cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
  42
  43 #define put_user_u32(val, addr)                                         \
  44     ({ uint32_t val_ = tswap32(val);                                    \
  45        cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
  46
  47 #define put_user_ual(arg, p) put_user_u32(arg, p)
  48
  49 void *uaccess_lock_user(CPUArchState *env, target_ulong addr,
  50                         target_ulong len, bool copy);
  51 #define lock_user(type, p, len, copy) uaccess_lock_user(env, p, len, copy)
  52
  53 char *uaccess_lock_user_string(CPUArchState *env, target_ulong addr);
  54 #define lock_user_string(p) uaccess_lock_user_string(env, p)
  55
  56 void uaccess_unlock_user(CPUArchState *env, void *p,
  57                          target_ulong addr, target_ulong len);
  58 #define unlock_user(s, args, len) uaccess_unlock_user(env, s, args, len)
  59
  60 ssize_t uaccess_strlen_user(CPUArchState *env, target_ulong addr);
  61 #define target_strlen(p) uaccess_strlen_user(env, p)
  62
  63 #endif /* SEMIHOSTING_SOFTMMU_UACCESS_H */