xref: /illumos-kvm-cmd/softmmu-semi.h (revision 68396ea9)
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 licenced under the GPL
8  */
9 
softmmu_tget32(CPUState * env,uint32_t addr)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 }
softmmu_tget8(CPUState * env,uint32_t addr)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 
softmmu_tput32(CPUState * env,uint32_t addr,uint32_t val)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 
softmmu_lock_user(CPUState * env,uint32_t addr,uint32_t len,int copy)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)
softmmu_lock_user_string(CPUState * env,uint32_t addr)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)
softmmu_unlock_user(CPUState * env,void * p,target_ulong addr,target_ulong len)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)
71