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;
30 target_ulong code_offset;
31 target_ulong data_offset;
36 /* Information about the current linux thread */
37 struct vm86_saved_state {
38 uint32_t eax; /* return code */
48 uint16_t cs, ss, ds, es, fs, gs;
54 #include "nwfpe/fpa11.h"
57 /* NOTE: we force a big alignment so that the stack stored after is
59 typedef struct TaskState {
60 struct TaskState *next;
64 /* Extra fields for semihosted binaries. */
71 target_ulong target_v86;
72 struct vm86_saved_state vm86_saved_regs;
73 struct target_vm86plus_struct vm86plus;
77 int used; /* non zero if used */
78 struct image_info *info;
80 } __attribute__((aligned(16))) TaskState;
82 extern TaskState *first_task_state;
83 extern const char *qemu_uname_release;
85 /* ??? See if we can avoid exposing so much of the loader internals. */
87 * MAX_ARG_PAGES defines the number of pages allocated for arguments
88 * and envelope for the new program. 32 should suffice, this gives
89 * a maximum env+arg of 128kB w/4KB pages!
91 #define MAX_ARG_PAGES 32
94 * This structure is used to hold the arguments that are
95 * used when loading binaries.
99 void *page[MAX_ARG_PAGES];
106 char * filename; /* Name of binary */
109 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
110 target_ulong loader_build_argptr(int envc, int argc, target_ulong sp,
111 target_ulong stringp, int push_ptr);
112 int loader_exec(const char * filename, char ** argv, char ** envp,
113 struct target_pt_regs * regs, struct image_info *infop);
115 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
116 struct image_info * info);
117 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
118 struct image_info * info);
120 void memcpy_to_target(target_ulong dest, const void *src,
122 void target_set_brk(target_ulong new_brk);
123 long do_brk(target_ulong new_brk);
124 void syscall_init(void);
125 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
126 long arg4, long arg5, long arg6);
127 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
128 extern CPUState *global_env;
129 void cpu_loop(CPUState *env);
130 void init_paths(const char *prefix);
131 const char *path(const char *pathname);
134 extern FILE *logfile;
137 void process_pending_signals(void *cpu_env);
138 void signal_init(void);
139 int queue_signal(int sig, target_siginfo_t *info);
140 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
141 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
142 long do_sigreturn(CPUState *env);
143 long do_rt_sigreturn(CPUState *env);
147 void save_v86_state(CPUX86State *env);
148 void handle_vm86_trap(CPUX86State *env, int trapno);
149 void handle_vm86_fault(CPUX86State *env);
150 int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
154 int target_mprotect(target_ulong start, target_ulong len, int prot);
155 long target_mmap(target_ulong start, target_ulong len, int prot,
156 int flags, int fd, target_ulong offset);
157 int target_munmap(target_ulong start, target_ulong len);
158 long target_mremap(target_ulong old_addr, target_ulong old_size,
159 target_ulong new_size, unsigned long flags,
160 target_ulong new_addr);
161 int target_msync(target_ulong start, target_ulong len, int flags);
165 #define VERIFY_READ 0
166 #define VERIFY_WRITE 1
168 #define access_ok(type,addr,size) (1)
170 /* NOTE get_user and put_user use host addresses. */
171 #define __put_user(x,ptr)\
173 int size = sizeof(*ptr);\
176 *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
179 *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
182 *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
185 *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
193 #define __get_user(x, ptr) \
195 int size = sizeof(*ptr);\
198 x = (typeof(*ptr))*(uint8_t *)(ptr);\
201 x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
204 x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
207 x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
215 #define put_user(x,ptr)\
218 if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
219 __ret = __put_user(x, ptr);\
225 #define get_user(x,ptr)\
228 if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
229 __ret = __get_user(x, ptr);\
235 /* Functions for accessing guest memory. The tget and tput functions
236 read/write single values, byteswapping as neccessary. The lock_user
237 gets a pointer to a contiguous area of guest memory, but does not perform
238 and byteswapping. lock_user may return either a pointer to the guest
239 memory, or a temporary buffer. */
241 /* Lock an area of guest memory into the host. If copy is true then the
242 host area will have the same contents as the guest. */
243 static inline void *lock_user(target_ulong guest_addr, long len, int copy)
249 memcpy(addr, g2h(guest_addr), len);
251 memset(addr, 0, len);
254 return g2h(guest_addr);
258 /* Unlock an area of guest memory. The first LEN bytes must be flushed back
260 static inline void unlock_user(void *host_addr, target_ulong guest_addr,
264 if (host_addr == g2h(guest_addr))
267 memcpy(g2h(guest_addr), host_addr, len);
272 /* Return the length of a string in target memory. */
273 static inline int target_strlen(target_ulong ptr)
275 return strlen(g2h(ptr));
278 /* Like lock_user but for null terminated strings. */
279 static inline void *lock_user_string(target_ulong guest_addr)
282 len = target_strlen(guest_addr) + 1;
283 return lock_user(guest_addr, len, 1);
286 /* Helper macros for locking/ulocking a target struct. */
287 #define lock_user_struct(host_ptr, guest_addr, copy) \
288 host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
289 #define unlock_user_struct(host_ptr, guest_addr, copy) \
290 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
292 #define tget8(addr) ldub(addr)
293 #define tput8(addr, val) stb(addr, val)
294 #define tget16(addr) lduw(addr)
295 #define tput16(addr, val) stw(addr, val)
296 #define tget32(addr) ldl(addr)
297 #define tput32(addr, val) stl(addr, val)
298 #define tget64(addr) ldq(addr)
299 #define tput64(addr, val) stq(addr, val)
300 #if TARGET_LONG_BITS == 64
301 #define tgetl(addr) ldq(addr)
302 #define tputl(addr, val) stq(addr, val)
304 #define tgetl(addr) ldl(addr)
305 #define tputl(addr, val) stl(addr, val)