/*

 * Helper routines to provide target memory access for semihosting

 * syscalls in system emulation mode.

 *

 * Copyright (c) 2007 CodeSourcery.

 *

 * This code is licenced under the GPL

 */

static inline uint32_t softmmu_tget32(CPUState *env, uint32_t addr)

{

    uint32_t val;

    cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0);

    return tswap32(val);

}

static inline uint32_t softmmu_tget8(CPUState *env, uint32_t addr)

{

    uint8_t val;

    cpu_memory_rw_debug(env, addr, &val, 1, 0);

    return val;

}

#define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; })

#define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; })

#define get_user_ual(arg, p) get_user_u32(arg, p)

static inline void softmmu_tput32(CPUState *env, uint32_t addr, uint32_t val)

{

    val = tswap32(val);

    cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 1);

}

#define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; })

#define put_user_ual(arg, p) put_user_u32(arg, p)

static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len,

                               int copy)

{

    uint8_t *p;

    /* TODO: Make this something that isn't fixed size.  */

    p = malloc(len);

    if (copy)

        cpu_memory_rw_debug(env, addr, p, len, 0);

    return p;

}

#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)

static char *softmmu_lock_user_string(CPUState *env, uint32_t addr)

{

    char *p;

    char *s;

    uint8_t c;

    /* TODO: Make this something that isn't fixed size.  */

    s = p = malloc(1024);

    do {

        cpu_memory_rw_debug(env, addr, &c, 1, 0);

        addr++;

        *(p++) = c;

    } while (c);

    return s;

}

#define lock_user_string(p) softmmu_lock_user_string(env, p)

static int softmmu_target_strlen(CPUState *env, target_ulong addr)

{

    uint8_t c;

    int len;

    len = 0;

    do {

        cpu_memory_rw_debug(env, addr + len, &c, 1, 0);

        len++;

    } while (c);

    return len - 1;

}

#define target_strlen(p) softmmu_target_strlen(env, p)

static void softmmu_unlock_user(CPUState *env, void *p, target_ulong addr,

                                target_ulong len)

{

    if (len)

        cpu_memory_rw_debug(env, addr, p, len, 1);

    free(p);

}

#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)