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 start_data
;
22 unsigned long end_data
;
23 unsigned long start_brk
;
25 unsigned long start_mmap
;
28 unsigned long start_stack
;
34 /* Information about the current linux thread */
35 struct vm86_saved_state
{
36 uint32_t eax
; /* return code */
46 uint16_t cs
, ss
, ds
, es
, fs
, gs
;
52 #include "nwfpe/fpa11.h"
55 /* NOTE: we force a big alignment so that the stack stored after is
57 typedef struct TaskState
{
58 struct TaskState
*next
;
62 /* Extra fields for semihosted binaries. */
69 target_ulong target_v86
;
70 struct vm86_saved_state vm86_saved_regs
;
71 struct target_vm86plus_struct vm86plus
;
75 int used
; /* non zero if used */
77 } __attribute__((aligned(16))) TaskState
;
79 extern TaskState
*first_task_state
;
80 extern const char *qemu_uname_release
;
82 /* ??? See if we can avoid exposing so much of the loader internals. */
84 * MAX_ARG_PAGES defines the number of pages allocated for arguments
85 * and envelope for the new program. 32 should suffice, this gives
86 * a maximum env+arg of 128kB w/4KB pages!
88 #define MAX_ARG_PAGES 32
91 * This structure is used to hold the arguments that are
92 * used when loading binaries.
96 void *page
[MAX_ARG_PAGES
];
103 char * filename
; /* Name of binary */
106 void do_init_thread(struct target_pt_regs
*regs
, struct image_info
*infop
);
107 target_ulong
loader_build_argptr(int envc
, int argc
, target_ulong sp
,
108 target_ulong stringp
, int push_ptr
);
109 int loader_exec(const char * filename
, char ** argv
, char ** envp
,
110 struct target_pt_regs
* regs
, struct image_info
*infop
);
112 int load_elf_binary(struct linux_binprm
* bprm
, struct target_pt_regs
* regs
,
113 struct image_info
* info
);
114 int load_flt_binary(struct linux_binprm
* bprm
, struct target_pt_regs
* regs
,
115 struct image_info
* info
);
117 void memcpy_to_target(target_ulong dest
, const void *src
,
119 void target_set_brk(target_ulong new_brk
);
120 long do_brk(target_ulong new_brk
);
121 void syscall_init(void);
122 long do_syscall(void *cpu_env
, int num
, long arg1
, long arg2
, long arg3
,
123 long arg4
, long arg5
, long arg6
);
124 void gemu_log(const char *fmt
, ...) __attribute__((format(printf
,1,2)));
125 extern CPUState
*global_env
;
126 void cpu_loop(CPUState
*env
);
127 void init_paths(const char *prefix
);
128 const char *path(const char *pathname
);
131 extern FILE *logfile
;
134 void process_pending_signals(void *cpu_env
);
135 void signal_init(void);
136 int queue_signal(int sig
, target_siginfo_t
*info
);
137 void host_to_target_siginfo(target_siginfo_t
*tinfo
, const siginfo_t
*info
);
138 void target_to_host_siginfo(siginfo_t
*info
, const target_siginfo_t
*tinfo
);
139 long do_sigreturn(CPUState
*env
);
140 long do_rt_sigreturn(CPUState
*env
);
144 void save_v86_state(CPUX86State
*env
);
145 void handle_vm86_trap(CPUX86State
*env
, int trapno
);
146 void handle_vm86_fault(CPUX86State
*env
);
147 int do_vm86(CPUX86State
*env
, long subfunction
, target_ulong v86_addr
);
151 int target_mprotect(target_ulong start
, target_ulong len
, int prot
);
152 long target_mmap(target_ulong start
, target_ulong len
, int prot
,
153 int flags
, int fd
, target_ulong offset
);
154 int target_munmap(target_ulong start
, target_ulong len
);
155 long target_mremap(target_ulong old_addr
, target_ulong old_size
,
156 target_ulong new_size
, unsigned long flags
,
157 target_ulong new_addr
);
158 int target_msync(target_ulong start
, target_ulong len
, int flags
);
162 #define VERIFY_READ 0
163 #define VERIFY_WRITE 1
165 #define access_ok(type,addr,size) (1)
167 /* NOTE get_user and put_user use host addresses. */
168 #define __put_user(x,ptr)\
170 int size = sizeof(*ptr);\
173 *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
176 *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
179 *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
182 *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
190 #define __get_user(x, ptr) \
192 int size = sizeof(*ptr);\
195 x = (typeof(*ptr))*(uint8_t *)(ptr);\
198 x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
201 x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
204 x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
212 #define put_user(x,ptr)\
215 if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
216 __ret = __put_user(x, ptr);\
222 #define get_user(x,ptr)\
225 if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
226 __ret = __get_user(x, ptr);\
232 /* Functions for accessing guest memory. The tget and tput functions
233 read/write single values, byteswapping as neccessary. The lock_user
234 gets a pointer to a contiguous area of guest memory, but does not perform
235 and byteswapping. lock_user may return either a pointer to the guest
236 memory, or a temporary buffer. */
238 /* Lock an area of guest memory into the host. If copy is true then the
239 host area will have the same contents as the guest. */
240 static inline void *lock_user(target_ulong guest_addr
, long len
, int copy
)
246 memcpy(addr
, g2h(guest_addr
), len
);
248 memset(addr
, 0, len
);
251 return g2h(guest_addr
);
255 /* Unlock an area of guest memory. The first LEN bytes must be flushed back
257 static inline void unlock_user(void *host_addr
, target_ulong guest_addr
,
261 if (host_addr
== g2h(guest_addr
))
264 memcpy(g2h(guest_addr
), host_addr
, len
);
269 /* Return the length of a string in target memory. */
270 static inline int target_strlen(target_ulong ptr
)
272 return strlen(g2h(ptr
));
275 /* Like lock_user but for null terminated strings. */
276 static inline void *lock_user_string(target_ulong guest_addr
)
279 len
= target_strlen(guest_addr
) + 1;
280 return lock_user(guest_addr
, len
, 1);
283 /* Helper macros for locking/ulocking a target struct. */
284 #define lock_user_struct(host_ptr, guest_addr, copy) \
285 host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
286 #define unlock_user_struct(host_ptr, guest_addr, copy) \
287 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
289 #define tget8(addr) ldub(addr)
290 #define tput8(addr, val) stb(addr, val)
291 #define tget16(addr) lduw(addr)
292 #define tput16(addr, val) stw(addr, val)
293 #define tget32(addr) ldl(addr)
294 #define tput32(addr, val) stl(addr, val)
295 #define tget64(addr) ldq(addr)
296 #define tput64(addr, val) stq(addr, val)
297 #if TARGET_LONG_BITS == 64
298 #define tgetl(addr) ldq(addr)
299 #define tputl(addr, val) stq(addr, val)
301 #define tgetl(addr) ldl(addr)
302 #define tputl(addr, val) stl(addr, val)