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_GET_CPU(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_GET_CPU(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_GET_CPU(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_GET_CPU(env), addr, p, len, 0);
47    }
48    return p;
49}
50#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
51static char *softmmu_lock_user_string(CPUArchState *env, uint32_t addr)
52{
53    char *p;
54    char *s;
55    uint8_t c;
56    /* TODO: Make this something that isn't fixed size.  */
57    s = p = malloc(1024);
58    if (!s) {
59        return NULL;
60    }
61    do {
62        cpu_memory_rw_debug(ENV_GET_CPU(env), addr, &c, 1, 0);
63        addr++;
64        *(p++) = c;
65    } while (c);
66    return s;
67}
68#define lock_user_string(p) softmmu_lock_user_string(env, p)
69static void softmmu_unlock_user(CPUArchState *env, void *p, target_ulong addr,
70                                target_ulong len)
71{
72    if (len) {
73        cpu_memory_rw_debug(ENV_GET_CPU(env), addr, p, len, 1);
74    }
75    free(p);
76}
77#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
78
79#endif
80