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 #include "gdbstub.h"
  13
  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
  17  */
  18 struct image_info {
  19         unsigned long   start_code;
  20         unsigned long   end_code;
  21         unsigned long   end_data;
  22         unsigned long   start_brk;
  23         unsigned long   brk;
  24         unsigned long   start_mmap;
  25         unsigned long   mmap;
  26         unsigned long   rss;
  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;
  32         unsigned long   entry;
  33         int             personality;
  34 };
  35
  36 #ifdef TARGET_I386
  37 /* Information about the current linux thread */
  38 struct vm86_saved_state {
  39     uint32_t eax; /* return code */
  40     uint32_t ebx;
  41     uint32_t ecx;
  42     uint32_t edx;
  43     uint32_t esi;
  44     uint32_t edi;
  45     uint32_t ebp;
  46     uint32_t esp;
  47     uint32_t eflags;
  48     uint32_t eip;
  49     uint16_t cs, ss, ds, es, fs, gs;
  50 };
  51 #endif
  52
  53 #ifdef TARGET_ARM
  54 /* FPU emulator */
  55 #include "nwfpe/fpa11.h"
  56 #endif
  57
  58 /* NOTE: we force a big alignment so that the stack stored after is
  59    aligned too */
  60 typedef struct TaskState {
  61     struct TaskState *next;
  62 #ifdef TARGET_ARM
  63     /* FPA state */
  64     FPA11 fpa;
  65     /* Extra fields for semihosted binaries.  */
  66     uint32_t stack_base;
  67     uint32_t heap_base;
  68     uint32_t heap_limit;
  69     int swi_errno;
  70 #endif
  71 #ifdef TARGET_I386
  72     struct target_vm86plus_struct *target_v86;
  73     struct vm86_saved_state vm86_saved_regs;
  74     struct target_vm86plus_struct vm86plus;
  75     uint32_t v86flags;
  76     uint32_t v86mask;
  77 #endif
  78     int used; /* non zero if used */
  79     uint8_t stack[0];
  80 } __attribute__((aligned(16))) TaskState;
  81
  82 extern TaskState *first_task_state;
  83
  84 int elf_exec(const char * filename, char ** argv, char ** envp,
  85              struct target_pt_regs * regs, struct image_info *infop);
  86
  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);
  97
  98 extern int loglevel;
  99 extern FILE *logfile;
 100
 101 /* signal.c */
 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);
 109
 110 #ifdef TARGET_I386
 111 /* vm86.c */
 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);
 117 #endif
 118
 119 /* mmap.c */
 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);
 128
 129 /* user access */
 130
 131 #define VERIFY_READ 0
 132 #define VERIFY_WRITE 1
 133
 134 #define access_ok(type,addr,size) (1)
 135
 136 #define __put_user(x,ptr)\
 137 ({\
 138     int size = sizeof(*ptr);\
 139     switch(size) {\
 140     case 1:\
 141         stb(ptr, (typeof(*ptr))(x));\
 142         break;\
 143     case 2:\
 144         stw(ptr, (typeof(*ptr))(x));\
 145         break;\
 146     case 4:\
 147         stl(ptr, (typeof(*ptr))(x));\
 148         break;\
 149     case 8:\
 150         stq(ptr, (typeof(*ptr))(x));\
 151         break;\
 152     default:\
 153         abort();\
 154     }\
 155     0;\
 156 })
 157
 158 #define __get_user(x, ptr) \
 159 ({\
 160     int size = sizeof(*ptr);\
 161     switch(size) {\
 162     case 1:\
 163         x = (typeof(*ptr))ldub((void *)ptr);\
 164         break;\
 165     case 2:\
 166         x = (typeof(*ptr))lduw((void *)ptr);\
 167         break;\
 168     case 4:\
 169         x = (typeof(*ptr))ldl((void *)ptr);\
 170         break;\
 171     case 8:\
 172         x = (typeof(*ptr))ldq((void *)ptr);\
 173         break;\
 174     default:\
 175         abort();\
 176     }\
 177     0;\
 178 })
 179
 180 static inline unsigned long __copy_to_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 __copy_from_user(void *dst, const void *src,
 188                                              unsigned long size)
 189 {
 190     memcpy(dst, src, size);
 191     return 0;
 192 }
 193
 194 static inline unsigned long __clear_user(void *dst, unsigned long size)
 195 {
 196     memset(dst, 0, size);
 197     return 0;
 198 }
 199
 200 #define put_user(x,ptr)\
 201 ({\
 202     int __ret;\
 203     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 204         __ret = __put_user(x, ptr);\
 205     else\
 206         __ret = -EFAULT;\
 207     __ret;\
 208 })
 209
 210 #define get_user(x,ptr)\
 211 ({\
 212     int __ret;\
 213     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 214         __ret = __get_user(x, ptr);\
 215     else\
 216         __ret = -EFAULT;\
 217     __ret;\
 218 })
 219
 220 static inline unsigned long copy_to_user(void *dst, const void *src,
 221                                          unsigned long size)
 222 {
 223     if (access_ok(VERIFY_WRITE, dst, size))
 224         return __copy_to_user(dst, src, size);
 225     else
 226         return size;
 227 }
 228
 229 static inline unsigned long copy_from_user(void *dst, const void *src,
 230                                              unsigned long size)
 231 {
 232     if (access_ok(VERIFY_READ, src, size))
 233         return __copy_from_user(dst, src, size);
 234     else
 235         return size;
 236 }
 237
 238 static inline unsigned long clear_user(void *dst, unsigned long size)
 239 {
 240     if (access_ok(VERIFY_WRITE, dst, size))
 241         return __clear_user(dst, size);
 242     else
 243         return size;
 244 }
 245
 246 #endif /* QEMU_H */