8 #include "syscall_defs.h"
14 /* This struct is used to hold certain information about the image.
15 * Basically, it replicates in user space what would be certain
16 * task_struct fields in the kernel
19 unsigned long start_code
;
20 unsigned long end_code
;
21 unsigned long end_data
;
22 unsigned long start_brk
;
24 unsigned long start_mmap
;
27 unsigned long start_stack
;
28 unsigned long arg_start
;
29 unsigned long arg_end
;
30 unsigned long env_start
;
31 unsigned long env_end
;
37 /* Information about the current linux thread */
38 struct vm86_saved_state
{
39 uint32_t eax
; /* return code */
49 uint16_t cs
, ss
, ds
, es
, fs
, gs
;
55 #include "nwfpe/fpa11.h"
58 /* NOTE: we force a big alignment so that the stack stored after is
60 typedef struct TaskState
{
61 struct TaskState
*next
;
65 /* Extra fields for semihosted binaries. */
72 struct target_vm86plus_struct
*target_v86
;
73 struct vm86_saved_state vm86_saved_regs
;
74 struct target_vm86plus_struct vm86plus
;
78 int used
; /* non zero if used */
80 } __attribute__((aligned(16))) TaskState
;
82 extern TaskState
*first_task_state
;
84 int elf_exec(const char * filename
, char ** argv
, char ** envp
,
85 struct target_pt_regs
* regs
, struct image_info
*infop
);
87 void target_set_brk(char *new_brk
);
88 long do_brk(char *new_brk
);
89 void syscall_init(void);
90 long do_syscall(void *cpu_env
, int num
, long arg1
, long arg2
, long arg3
,
91 long arg4
, long arg5
, long arg6
);
92 void gemu_log(const char *fmt
, ...) __attribute__((format(printf
,1,2)));
93 extern CPUState
*global_env
;
94 void cpu_loop(CPUState
*env
);
95 void init_paths(const char *prefix
);
96 const char *path(const char *pathname
);
102 void process_pending_signals(void *cpu_env
);
103 void signal_init(void);
104 int queue_signal(int sig
, target_siginfo_t
*info
);
105 void host_to_target_siginfo(target_siginfo_t
*tinfo
, const siginfo_t
*info
);
106 void target_to_host_siginfo(siginfo_t
*info
, const target_siginfo_t
*tinfo
);
107 long do_sigreturn(CPUState
*env
);
108 long do_rt_sigreturn(CPUState
*env
);
112 void save_v86_state(CPUX86State
*env
);
113 void handle_vm86_trap(CPUX86State
*env
, int trapno
);
114 void handle_vm86_fault(CPUX86State
*env
);
115 int do_vm86(CPUX86State
*env
, long subfunction
,
116 struct target_vm86plus_struct
* target_v86
);
120 int target_mprotect(unsigned long start
, unsigned long len
, int prot
);
121 long target_mmap(unsigned long start
, unsigned long len
, int prot
,
122 int flags
, int fd
, unsigned long offset
);
123 int target_munmap(unsigned long start
, unsigned long len
);
124 long target_mremap(unsigned long old_addr
, unsigned long old_size
,
125 unsigned long new_size
, unsigned long flags
,
126 unsigned long new_addr
);
127 int target_msync(unsigned long start
, unsigned long len
, int flags
);
131 #define VERIFY_READ 0
132 #define VERIFY_WRITE 1
134 #define access_ok(type,addr,size) (1)
136 #define __put_user(x,ptr)\
138 int size = sizeof(*ptr);\
141 stb(ptr, (typeof(*ptr))(x));\
144 stw(ptr, (typeof(*ptr))(x));\
147 stl(ptr, (typeof(*ptr))(x));\
150 stq(ptr, (typeof(*ptr))(x));\
158 #define __get_user(x, ptr) \
160 int size = sizeof(*ptr);\
163 x = (typeof(*ptr))ldub((void *)ptr);\
166 x = (typeof(*ptr))lduw((void *)ptr);\
169 x = (typeof(*ptr))ldl((void *)ptr);\
172 x = (typeof(*ptr))ldq((void *)ptr);\
180 static inline unsigned long __copy_to_user(void *dst
, const void *src
,
183 memcpy(dst
, src
, size
);
187 static inline unsigned long __copy_from_user(void *dst
, const void *src
,
190 memcpy(dst
, src
, size
);
194 static inline unsigned long __clear_user(void *dst
, unsigned long size
)
196 memset(dst
, 0, size
);
200 #define put_user(x,ptr)\
203 if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
204 __ret = __put_user(x, ptr);\
210 #define get_user(x,ptr)\
213 if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
214 __ret = __get_user(x, ptr);\
220 static inline unsigned long copy_to_user(void *dst
, const void *src
,
223 if (access_ok(VERIFY_WRITE
, dst
, size
))
224 return __copy_to_user(dst
, src
, size
);
229 static inline unsigned long copy_from_user(void *dst
, const void *src
,
232 if (access_ok(VERIFY_READ
, src
, size
))
233 return __copy_from_user(dst
, src
, size
);
238 static inline unsigned long clear_user(void *dst
, unsigned long size
)
240 if (access_ok(VERIFY_WRITE
, dst
, size
))
241 return __clear_user(dst
, size
);