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     target_ulong 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 extern const char *qemu_uname_release;
  84
  85 int elf_exec(const char * filename, char ** argv, char ** envp,
  86              struct target_pt_regs * regs, struct image_info *infop);
  87
  88 void target_set_brk(target_ulong new_brk);
  89 long do_brk(target_ulong new_brk);
  90 void syscall_init(void);
  91 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
  92                 long arg4, long arg5, long arg6);
  93 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
  94 extern CPUState *global_env;
  95 void cpu_loop(CPUState *env);
  96 void init_paths(const char *prefix);
  97 const char *path(const char *pathname);
  98
  99 extern int loglevel;
 100 extern FILE *logfile;
 101
 102 /* signal.c */
 103 void process_pending_signals(void *cpu_env);
 104 void signal_init(void);
 105 int queue_signal(int sig, target_siginfo_t *info);
 106 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 107 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 108 long do_sigreturn(CPUState *env);
 109 long do_rt_sigreturn(CPUState *env);
 110
 111 #ifdef TARGET_I386
 112 /* vm86.c */
 113 void save_v86_state(CPUX86State *env);
 114 void handle_vm86_trap(CPUX86State *env, int trapno);
 115 void handle_vm86_fault(CPUX86State *env);
 116 int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
 117 #endif
 118
 119 /* mmap.c */
 120 int target_mprotect(target_ulong start, target_ulong len, int prot);
 121 long target_mmap(target_ulong start, target_ulong len, int prot,
 122                  int flags, int fd, target_ulong offset);
 123 int target_munmap(target_ulong start, target_ulong len);
 124 long target_mremap(target_ulong old_addr, target_ulong old_size,
 125                    target_ulong new_size, unsigned long flags,
 126                    target_ulong new_addr);
 127 int target_msync(target_ulong start, target_ulong 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 /* NOTE get_user and put_user use host addresses.  */
 137 #define __put_user(x,ptr)\
 138 ({\
 139     int size = sizeof(*ptr);\
 140     switch(size) {\
 141     case 1:\
 142         *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
 143         break;\
 144     case 2:\
 145         *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
 146         break;\
 147     case 4:\
 148         *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
 149         break;\
 150     case 8:\
 151         *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
 152         break;\
 153     default:\
 154         abort();\
 155     }\
 156     0;\
 157 })
 158
 159 #define __get_user(x, ptr) \
 160 ({\
 161     int size = sizeof(*ptr);\
 162     switch(size) {\
 163     case 1:\
 164         x = (typeof(*ptr))*(uint8_t *)(ptr);\
 165         break;\
 166     case 2:\
 167         x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
 168         break;\
 169     case 4:\
 170         x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
 171         break;\
 172     case 8:\
 173         x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
 174         break;\
 175     default:\
 176         abort();\
 177     }\
 178     0;\
 179 })
 180
 181 #define put_user(x,ptr)\
 182 ({\
 183     int __ret;\
 184     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 185         __ret = __put_user(x, ptr);\
 186     else\
 187         __ret = -EFAULT;\
 188     __ret;\
 189 })
 190
 191 #define get_user(x,ptr)\
 192 ({\
 193     int __ret;\
 194     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 195         __ret = __get_user(x, ptr);\
 196     else\
 197         __ret = -EFAULT;\
 198     __ret;\
 199 })
 200
 201 /* Functions for accessing guest memory.  The tget and tput functions
 202    read/write single values, byteswapping as neccessary.  The lock_user
 203    gets a pointer to a contiguous area of guest memory, but does not perform
 204    and byteswapping.  lock_user may return either a pointer to the guest
 205    memory, or a temporary buffer.  */
 206
 207 /* Lock an area of guest memory into the host.  If copy is true then the
 208    host area will have the same contents as the guest.  */
 209 static inline void *lock_user(target_ulong guest_addr, long len, int copy)
 210 {
 211 #ifdef DEBUG_REMAP
 212     void *addr;
 213     addr = malloc(len);
 214     if (copy)
 215         memcpy(addr, g2h(guest_addr), len);
 216     else
 217         memset(addr, 0, len);
 218     return addr;
 219 #else
 220     return g2h(guest_addr);
 221 #endif
 222 }
 223
 224 /* Unlock an area of guest memory.  The first LEN bytes must be flushed back
 225    to guest memory.  */
 226 static inline void unlock_user(void *host_addr, target_ulong guest_addr,
 227                                 long len)
 228 {
 229 #ifdef DEBUG_REMAP
 230     if (host_addr == g2h(guest_addr))
 231         return;
 232     if (len > 0)
 233         memcpy(g2h(guest_addr), host_addr, len);
 234     free(host_addr);
 235 #endif
 236 }
 237
 238 /* Return the length of a string in target memory.  */
 239 static inline int target_strlen(target_ulong ptr)
 240 {
 241   return strlen(g2h(ptr));
 242 }
 243
 244 /* Like lock_user but for null terminated strings.  */
 245 static inline void *lock_user_string(target_ulong guest_addr)
 246 {
 247     long len;
 248     len = target_strlen(guest_addr) + 1;
 249     return lock_user(guest_addr, len, 1);
 250 }
 251
 252 /* Helper macros for locking/ulocking a target struct.  */
 253 #define lock_user_struct(host_ptr, guest_addr, copy) \
 254     host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
 255 #define unlock_user_struct(host_ptr, guest_addr, copy) \
 256     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 257
 258 #define tget8(addr) ldub(addr)
 259 #define tput8(addr, val) stb(addr, val)
 260 #define tget16(addr) lduw(addr)
 261 #define tput16(addr, val) stw(addr, val)
 262 #define tget32(addr) ldl(addr)
 263 #define tput32(addr, val) stl(addr, val)
 264 #define tget64(addr) ldq(addr)
 265 #define tput64(addr, val) stq(addr, val)
 266 #if TARGET_LONG_BITS == 64
 267 #define tgetl(addr) ldq(addr)
 268 #define tputl(addr, val) stq(addr, val)
 269 #else
 270 #define tgetl(addr) ldl(addr)
 271 #define tputl(addr, val) stl(addr, val)
 272 #endif
 273
 274 #endif /* QEMU_H */