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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 | static inline uint32_t softmmu_tget32(CPUState *env, uint32_t addr) | |
11 | { | |
12 | uint32_t val; | |
13 | ||
14 | cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0); | |
15 | return tswap32(val); | |
16 | } | |
17 | static inline uint32_t softmmu_tget8(CPUState *env, uint32_t addr) | |
18 | { | |
19 | uint8_t val; | |
20 | ||
21 | cpu_memory_rw_debug(env, addr, &val, 1, 0); | |
22 | return val; | |
23 | } | |
24 | ||
25 | #define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; }) | |
26 | #define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; }) | |
27 | #define get_user_ual(arg, p) get_user_u32(arg, p) | |
28 | ||
29 | static inline void softmmu_tput32(CPUState *env, uint32_t addr, uint32_t val) | |
30 | { | |
31 | val = tswap32(val); | |
32 | cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 1); | |
33 | } | |
34 | #define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; }) | |
35 | #define put_user_ual(arg, p) put_user_u32(arg, p) | |
36 | ||
37 | static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len, | |
38 | int copy) | |
39 | { | |
40 | uint8_t *p; | |
41 | /* TODO: Make this something that isn't fixed size. */ | |
42 | p = malloc(len); | |
43 | if (copy) | |
44 | cpu_memory_rw_debug(env, addr, p, len, 0); | |
45 | return p; | |
46 | } | |
47 | #define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy) | |
48 | static char *softmmu_lock_user_string(CPUState *env, uint32_t addr) | |
49 | { | |
50 | char *p; | |
51 | char *s; | |
52 | uint8_t c; | |
53 | /* TODO: Make this something that isn't fixed size. */ | |
54 | s = p = malloc(1024); | |
55 | do { | |
56 | cpu_memory_rw_debug(env, addr, &c, 1, 0); | |
57 | addr++; | |
58 | *(p++) = c; | |
59 | } while (c); | |
60 | return s; | |
61 | } | |
62 | #define lock_user_string(p) softmmu_lock_user_string(env, p) | |
63 | static void softmmu_unlock_user(CPUState *env, void *p, target_ulong addr, | |
64 | target_ulong len) | |
65 | { | |
66 | if (len) | |
67 | cpu_memory_rw_debug(env, addr, p, len, 1); | |
68 | free(p); | |
69 | } | |
70 | #define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len) |