linux-user/qemu.h

   1 #ifndef QEMU_H
   2 #define QEMU_H
   3
   4 #include "thunk.h"
   5
   6 #include <signal.h>
   7 #include <string.h>
   8 #include "syscall_defs.h"
   9
  10 #include "cpu.h"
  11 #include "syscall.h"
  12
  13 /* This struct is used to hold certain information about the image.
  14  * Basically, it replicates in user space what would be certain
  15  * task_struct fields in the kernel
  16  */
  17 struct image_info {
  18         unsigned long   start_code;
  19         unsigned long   end_code;
  20         unsigned long   end_data;
  21         unsigned long   start_brk;
  22         unsigned long   brk;
  23         unsigned long   start_mmap;
  24         unsigned long   mmap;
  25         unsigned long   rss;
  26         unsigned long   start_stack;
  27         unsigned long   arg_start;
  28         unsigned long   arg_end;
  29         unsigned long   env_start;
  30         unsigned long   env_end;
  31         unsigned long   entry;
  32         int             personality;
  33 };
  34
  35 #ifdef TARGET_I386
  36 /* Information about the current linux thread */
  37 struct vm86_saved_state {
  38     uint32_t eax; /* return code */
  39     uint32_t ebx;
  40     uint32_t ecx;
  41     uint32_t edx;
  42     uint32_t esi;
  43     uint32_t edi;
  44     uint32_t ebp;
  45     uint32_t esp;
  46     uint32_t eflags;
  47     uint32_t eip;
  48     uint16_t cs, ss, ds, es, fs, gs;
  49 };
  50 #endif
  51
  52 #ifdef TARGET_ARM
  53 /* FPU emulator */
  54 #include "nwfpe/fpa11.h"
  55 #endif
  56
  57 /* NOTE: we force a big alignment so that the stack stored after is
  58    aligned too */
  59 typedef struct TaskState {
  60     struct TaskState *next;
  61 #ifdef TARGET_ARM
  62     /* FPA state */
  63     FPA11 fpa;
  64 #endif
  65 #ifdef TARGET_I386
  66     struct target_vm86plus_struct *target_v86;
  67     struct vm86_saved_state vm86_saved_regs;
  68     struct target_vm86plus_struct vm86plus;
  69     uint32_t v86flags;
  70     uint32_t v86mask;
  71 #endif
  72     int used; /* non zero if used */
  73     uint8_t stack[0];
  74 } __attribute__((aligned(16))) TaskState;
  75
  76 extern TaskState *first_task_state;
  77
  78 int elf_exec(const char * filename, char ** argv, char ** envp,
  79              struct target_pt_regs * regs, struct image_info *infop);
  80
  81 void target_set_brk(char *new_brk);
  82 void syscall_init(void);
  83 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
  84                 long arg4, long arg5, long arg6);
  85 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
  86 extern CPUState *global_env;
  87 void cpu_loop(CPUState *env);
  88 void init_paths(const char *prefix);
  89 const char *path(const char *pathname);
  90
  91 extern int loglevel;
  92 extern FILE *logfile;
  93
  94 /* signal.c */
  95 void process_pending_signals(void *cpu_env);
  96 void signal_init(void);
  97 int queue_signal(int sig, target_siginfo_t *info);
  98 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
  99 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 100 long do_sigreturn(CPUState *env);
 101 long do_rt_sigreturn(CPUState *env);
 102
 103 #ifdef TARGET_I386
 104 /* vm86.c */
 105 void save_v86_state(CPUX86State *env);
 106 void handle_vm86_trap(CPUX86State *env, int trapno);
 107 void handle_vm86_fault(CPUX86State *env);
 108 int do_vm86(CPUX86State *env, long subfunction,
 109             struct target_vm86plus_struct * target_v86);
 110 #endif
 111
 112 /* mmap.c */
 113 int target_mprotect(unsigned long start, unsigned long len, int prot);
 114 long target_mmap(unsigned long start, unsigned long len, int prot,
 115                  int flags, int fd, unsigned long offset);
 116 int target_munmap(unsigned long start, unsigned long len);
 117 long target_mremap(unsigned long old_addr, unsigned long old_size,
 118                    unsigned long new_size, unsigned long flags,
 119                    unsigned long new_addr);
 120 int target_msync(unsigned long start, unsigned long len, int flags);
 121
 122 /* user access */
 123
 124 #define VERIFY_READ 0
 125 #define VERIFY_WRITE 1
 126
 127 #define access_ok(type,addr,size) (1)
 128
 129 #define __put_user(x,ptr)\
 130 ({\
 131     int size = sizeof(*ptr);\
 132     switch(size) {\
 133     case 1:\
 134         stb(ptr, (typeof(*ptr))(x));\
 135         break;\
 136     case 2:\
 137         stw(ptr, (typeof(*ptr))(x));\
 138         break;\
 139     case 4:\
 140         stl(ptr, (typeof(*ptr))(x));\
 141         break;\
 142     case 8:\
 143         stq(ptr, (typeof(*ptr))(x));\
 144         break;\
 145     default:\
 146         abort();\
 147     }\
 148     0;\
 149 })
 150
 151 #define __get_user(x, ptr) \
 152 ({\
 153     int size = sizeof(*ptr);\
 154     switch(size) {\
 155     case 1:\
 156         x = (typeof(*ptr))ldub((void *)ptr);\
 157         break;\
 158     case 2:\
 159         x = (typeof(*ptr))lduw((void *)ptr);\
 160         break;\
 161     case 4:\
 162         x = (typeof(*ptr))ldl((void *)ptr);\
 163         break;\
 164     case 8:\
 165         x = (typeof(*ptr))ldq((void *)ptr);\
 166         break;\
 167     default:\
 168         abort();\
 169     }\
 170     0;\
 171 })
 172
 173 static inline unsigned long __copy_to_user(void *dst, const void *src,
 174                                            unsigned long size)
 175 {
 176     memcpy(dst, src, size);
 177     return 0;
 178 }
 179
 180 static inline unsigned long __copy_from_user(void *dst, const void *src,
 181                                              unsigned long size)
 182 {
 183     memcpy(dst, src, size);
 184     return 0;
 185 }
 186
 187 static inline unsigned long __clear_user(void *dst, unsigned long size)
 188 {
 189     memset(dst, 0, size);
 190     return 0;
 191 }
 192
 193 #define put_user(x,ptr)\
 194 ({\
 195     int __ret;\
 196     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 197         __ret = __put_user(x, ptr);\
 198     else\
 199         __ret = -EFAULT;\
 200     __ret;\
 201 })
 202
 203 #define get_user(x,ptr)\
 204 ({\
 205     int __ret;\
 206     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 207         __ret = __get_user(x, ptr);\
 208     else\
 209         __ret = -EFAULT;\
 210     __ret;\
 211 })
 212
 213 static inline unsigned long copy_to_user(void *dst, const void *src,
 214                                          unsigned long size)
 215 {
 216     if (access_ok(VERIFY_WRITE, dst, size))
 217         return __copy_to_user(dst, src, size);
 218     else
 219         return size;
 220 }
 221
 222 static inline unsigned long copy_from_user(void *dst, const void *src,
 223                                              unsigned long size)
 224 {
 225     if (access_ok(VERIFY_READ, src, size))
 226         return __copy_from_user(dst, src, size);
 227     else
 228         return size;
 229 }
 230
 231 static inline unsigned long clear_user(void *dst, unsigned long size)
 232 {
 233     if (access_ok(VERIFY_WRITE, dst, size))
 234         return __clear_user(dst, size);
 235     else
 236         return size;
 237 }
 238
 239 #endif /* QEMU_H */