linux-user/qemu.h

   1 #ifndef QEMU_H
   2 #define QEMU_H
   3
   4 #include <signal.h>
   5 #include <string.h>
   6
   7 #include "cpu.h"
   8
   9 #ifdef TARGET_ABI32
  10 typedef uint32_t abi_ulong;
  11 typedef int32_t abi_long;
  12 #define TARGET_ABI_BITS 32
  13 #else
  14 typedef target_ulong abi_ulong;
  15 typedef target_long abi_long;
  16 #define TARGET_ABI_BITS TARGET_LONG_BITS
  17 #endif
  18
  19 #include "thunk.h"
  20 #include "syscall_defs.h"
  21 #include "syscall.h"
  22 #include "target_signal.h"
  23 #include "gdbstub.h"
  24
  25 /* This struct is used to hold certain information about the image.
  26  * Basically, it replicates in user space what would be certain
  27  * task_struct fields in the kernel
  28  */
  29 struct image_info {
  30         abi_ulong       load_addr;
  31         abi_ulong       start_code;
  32         abi_ulong       end_code;
  33         abi_ulong       start_data;
  34         abi_ulong       end_data;
  35         abi_ulong       start_brk;
  36         abi_ulong       brk;
  37         abi_ulong       start_mmap;
  38         abi_ulong       mmap;
  39         abi_ulong       rss;
  40         abi_ulong       start_stack;
  41         abi_ulong       entry;
  42         abi_ulong       code_offset;
  43         abi_ulong       data_offset;
  44         char            **host_argv;
  45         int             personality;
  46 };
  47
  48 #ifdef TARGET_I386
  49 /* Information about the current linux thread */
  50 struct vm86_saved_state {
  51     uint32_t eax; /* return code */
  52     uint32_t ebx;
  53     uint32_t ecx;
  54     uint32_t edx;
  55     uint32_t esi;
  56     uint32_t edi;
  57     uint32_t ebp;
  58     uint32_t esp;
  59     uint32_t eflags;
  60     uint32_t eip;
  61     uint16_t cs, ss, ds, es, fs, gs;
  62 };
  63 #endif
  64
  65 #ifdef TARGET_ARM
  66 /* FPU emulator */
  67 #include "nwfpe/fpa11.h"
  68 #endif
  69
  70 /* NOTE: we force a big alignment so that the stack stored after is
  71    aligned too */
  72 typedef struct TaskState {
  73     struct TaskState *next;
  74 #ifdef TARGET_ARM
  75     /* FPA state */
  76     FPA11 fpa;
  77     int swi_errno;
  78 #endif
  79 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
  80     abi_ulong target_v86;
  81     struct vm86_saved_state vm86_saved_regs;
  82     struct target_vm86plus_struct vm86plus;
  83     uint32_t v86flags;
  84     uint32_t v86mask;
  85 #endif
  86 #ifdef TARGET_M68K
  87     int sim_syscalls;
  88 #endif
  89 #if defined(TARGET_ARM) || defined(TARGET_M68K)
  90     /* Extra fields for semihosted binaries.  */
  91     uint32_t stack_base;
  92     uint32_t heap_base;
  93     uint32_t heap_limit;
  94 #endif
  95     int used; /* non zero if used */
  96     struct image_info *info;
  97     uint8_t stack[0];
  98 } __attribute__((aligned(16))) TaskState;
  99
 100 extern TaskState *first_task_state;
 101 extern const char *qemu_uname_release;
 102
 103 /* ??? See if we can avoid exposing so much of the loader internals.  */
 104 /*
 105  * MAX_ARG_PAGES defines the number of pages allocated for arguments
 106  * and envelope for the new program. 32 should suffice, this gives
 107  * a maximum env+arg of 128kB w/4KB pages!
 108  */
 109 #define MAX_ARG_PAGES 32
 110
 111 /*
 112  * This structure is used to hold the arguments that are
 113  * used when loading binaries.
 114  */
 115 struct linux_binprm {
 116         char buf[128];
 117         void *page[MAX_ARG_PAGES];
 118         abi_ulong p;
 119         int fd;
 120         int e_uid, e_gid;
 121         int argc, envc;
 122         char **argv;
 123         char **envp;
 124         char * filename;        /* Name of binary */
 125 };
 126
 127 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
 128 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
 129                               abi_ulong stringp, int push_ptr);
 130 int loader_exec(const char * filename, char ** argv, char ** envp,
 131              struct target_pt_regs * regs, struct image_info *infop);
 132
 133 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
 134                     struct image_info * info);
 135 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
 136                     struct image_info * info);
 137 #ifdef TARGET_HAS_ELFLOAD32
 138 int load_elf_binary_multi(struct linux_binprm *bprm,
 139                           struct target_pt_regs *regs,
 140                           struct image_info *info);
 141 #endif
 142
 143 void memcpy_to_target(abi_ulong dest, const void *src,
 144                       unsigned long len);
 145 void target_set_brk(abi_ulong new_brk);
 146 abi_long do_brk(abi_ulong new_brk);
 147 void syscall_init(void);
 148 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 149                     abi_long arg2, abi_long arg3, abi_long arg4,
 150                     abi_long arg5, abi_long arg6);
 151 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
 152 extern CPUState *global_env;
 153 void cpu_loop(CPUState *env);
 154 void init_paths(const char *prefix);
 155 const char *path(const char *pathname);
 156 char *target_strerror(int err);
 157
 158 extern int loglevel;
 159 extern FILE *logfile;
 160
 161 /* strace.c */
 162 void print_syscall(int num,
 163                    target_long arg1, target_long arg2, target_long arg3,
 164                    target_long arg4, target_long arg5, target_long arg6);
 165 void print_syscall_ret(int num, target_long arg1);
 166 extern int do_strace;
 167
 168 /* signal.c */
 169 void process_pending_signals(void *cpu_env);
 170 void signal_init(void);
 171 int queue_signal(int sig, target_siginfo_t *info);
 172 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
 173 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
 174 long do_sigreturn(CPUState *env);
 175 long do_rt_sigreturn(CPUState *env);
 176 int do_sigaltstack(const struct target_sigaltstack *uss,
 177                    struct target_sigaltstack *uoss,
 178                    abi_ulong sp);
 179
 180 #ifdef TARGET_I386
 181 /* vm86.c */
 182 void save_v86_state(CPUX86State *env);
 183 void handle_vm86_trap(CPUX86State *env, int trapno);
 184 void handle_vm86_fault(CPUX86State *env);
 185 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
 186 #elif defined(TARGET_SPARC64)
 187 void sparc64_set_context(CPUSPARCState *env);
 188 void sparc64_get_context(CPUSPARCState *env);
 189 #endif
 190
 191 /* mmap.c */
 192 int target_mprotect(abi_ulong start, abi_ulong len, int prot);
 193 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
 194                      int flags, int fd, abi_ulong offset);
 195 int target_munmap(abi_ulong start, abi_ulong len);
 196 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
 197                        abi_ulong new_size, unsigned long flags,
 198                        abi_ulong new_addr);
 199 int target_msync(abi_ulong start, abi_ulong len, int flags);
 200
 201 /* user access */
 202
 203 #define VERIFY_READ 0
 204 #define VERIFY_WRITE 1
 205
 206 #define access_ok(type,addr,size) \
 207     (page_check_range((target_ulong)addr,size,(type==VERIFY_READ)?PAGE_READ:PAGE_WRITE)==0)
 208
 209 /* NOTE __get_user and __put_user use host pointers and don't check access. */
 210 #define __put_user(x, hptr)\
 211 ({\
 212     int size = sizeof(*hptr);\
 213     switch(size) {\
 214     case 1:\
 215         *(uint8_t *)(hptr) = (typeof(*hptr))(x);\
 216         break;\
 217     case 2:\
 218         *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
 219         break;\
 220     case 4:\
 221         *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
 222         break;\
 223     case 8:\
 224         *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
 225         break;\
 226     default:\
 227         abort();\
 228     }\
 229     0;\
 230 })
 231
 232 #define __get_user(x, hptr) \
 233 ({\
 234     int size = sizeof(*hptr);\
 235     switch(size) {\
 236     case 1:\
 237         x = (typeof(*hptr))*(uint8_t *)(hptr);\
 238         break;\
 239     case 2:\
 240         x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
 241         break;\
 242     case 4:\
 243         x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
 244         break;\
 245     case 8:\
 246         x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
 247         break;\
 248     default:\
 249         abort();\
 250     }\
 251     0;\
 252 })
 253
 254 #define put_user(x,ptr)\
 255 ({\
 256     int __ret;\
 257     if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
 258         __ret = __put_user(x, ptr);\
 259     else\
 260         __ret = -EFAULT;\
 261     __ret;\
 262 })
 263
 264 #define get_user(x,ptr)\
 265 ({\
 266     int __ret;\
 267     if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
 268         __ret = __get_user(x, ptr);\
 269     else\
 270         __ret = -EFAULT;\
 271     __ret;\
 272 })
 273
 274 /* Functions for accessing guest memory.  The tget and tput functions
 275    read/write single values, byteswapping as neccessary.  The lock_user
 276    gets a pointer to a contiguous area of guest memory, but does not perform
 277    and byteswapping.  lock_user may return either a pointer to the guest
 278    memory, or a temporary buffer.  */
 279
 280 /* Lock an area of guest memory into the host.  If copy is true then the
 281    host area will have the same contents as the guest.  */
 282 static inline void *lock_user(abi_ulong guest_addr, long len, int copy)
 283 {
 284 #ifdef DEBUG_REMAP
 285     void *addr;
 286     addr = malloc(len);
 287     if (copy)
 288         memcpy(addr, g2h(guest_addr), len);
 289     else
 290         memset(addr, 0, len);
 291     return addr;
 292 #else
 293     return g2h(guest_addr);
 294 #endif
 295 }
 296
 297 /* Unlock an area of guest memory.  The first LEN bytes must be flushed back
 298    to guest memory.  */
 299 static inline void unlock_user(void *host_addr, abi_ulong guest_addr,
 300                                long len)
 301 {
 302 #ifdef DEBUG_REMAP
 303     if (host_addr == g2h(guest_addr))
 304         return;
 305     if (len > 0)
 306         memcpy(g2h(guest_addr), host_addr, len);
 307     free(host_addr);
 308 #endif
 309 }
 310
 311 /* Return the length of a string in target memory.  */
 312 static inline int target_strlen(abi_ulong ptr)
 313 {
 314   return strlen(g2h(ptr));
 315 }
 316
 317 /* Like lock_user but for null terminated strings.  */
 318 static inline void *lock_user_string(abi_ulong guest_addr)
 319 {
 320     long len;
 321     len = target_strlen(guest_addr) + 1;
 322     return lock_user(guest_addr, len, 1);
 323 }
 324
 325 /* Helper macros for locking/ulocking a target struct.  */
 326 #define lock_user_struct(host_ptr, guest_addr, copy) \
 327     host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
 328 #define unlock_user_struct(host_ptr, guest_addr, copy) \
 329     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
 330
 331 #define tget8(addr) ldub(addr)
 332 #define tput8(addr, val) stb(addr, val)
 333 #define tget16(addr) lduw(addr)
 334 #define tput16(addr, val) stw(addr, val)
 335 #define tget32(addr) ldl(addr)
 336 #define tput32(addr, val) stl(addr, val)
 337 #define tget64(addr) ldq(addr)
 338 #define tput64(addr, val) stq(addr, val)
 339 #if TARGET_ABI_BITS == 64
 340 #define tgetl(addr) ldq(addr)
 341 #define tputl(addr, val) stq(addr, val)
 342 #else
 343 #define tgetl(addr) ldl(addr)
 344 #define tputl(addr, val) stl(addr, val)
 345 #endif
 346
 347 #endif /* QEMU_H */