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 start_data; 22 unsigned long end_data; 23 unsigned long start_brk; 24 unsigned long brk; 25 unsigned long start_mmap; 26 unsigned long mmap; 27 unsigned long rss; 28 unsigned long start_stack; 29 unsigned long entry; 30 target_ulong code_offset; 31 target_ulong data_offset; 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 /* Extra fields for semihosted binaries. */ 65 uint32_t stack_base; 66 uint32_t heap_base; 67 uint32_t heap_limit; 68 int swi_errno; 69 #endif 70 #ifdef TARGET_I386 71 target_ulong target_v86; 72 struct vm86_saved_state vm86_saved_regs; 73 struct target_vm86plus_struct vm86plus; 74 uint32_t v86flags; 75 uint32_t v86mask; 76 #endif 77 #ifdef TARGET_M68K 78 int sim_syscalls; 79 #endif 80 int used; /* non zero if used */ 81 struct image_info *info; 82 uint8_t stack[0]; 83 } __attribute__((aligned(16))) TaskState; 84 85 extern TaskState *first_task_state; 86 extern const char *qemu_uname_release; 87 88 /* ??? See if we can avoid exposing so much of the loader internals. */ 89 /* 90 * MAX_ARG_PAGES defines the number of pages allocated for arguments 91 * and envelope for the new program. 32 should suffice, this gives 92 * a maximum env+arg of 128kB w/4KB pages! 93 */ 94 #define MAX_ARG_PAGES 32 95 96 /* 97 * This structure is used to hold the arguments that are 98 * used when loading binaries. 99 */ 100 struct linux_binprm { 101 char buf[128]; 102 void *page[MAX_ARG_PAGES]; 103 unsigned long p; 104 int fd; 105 int e_uid, e_gid; 106 int argc, envc; 107 char **argv; 108 char **envp; 109 char * filename; /* Name of binary */ 110 }; 111 112 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 113 target_ulong loader_build_argptr(int envc, int argc, target_ulong sp, 114 target_ulong stringp, int push_ptr); 115 int loader_exec(const char * filename, char ** argv, char ** envp, 116 struct target_pt_regs * regs, struct image_info *infop); 117 118 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 119 struct image_info * info); 120 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, 121 struct image_info * info); 122 123 void memcpy_to_target(target_ulong dest, const void *src, 124 unsigned long len); 125 void target_set_brk(target_ulong new_brk); 126 long do_brk(target_ulong new_brk); 127 void syscall_init(void); 128 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3, 129 long arg4, long arg5, long arg6); 130 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2))); 131 extern CPUState *global_env; 132 void cpu_loop(CPUState *env); 133 void init_paths(const char *prefix); 134 const char *path(const char *pathname); 135 136 extern int loglevel; 137 extern FILE *logfile; 138 139 /* signal.c */ 140 void process_pending_signals(void *cpu_env); 141 void signal_init(void); 142 int queue_signal(int sig, target_siginfo_t *info); 143 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); 144 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); 145 long do_sigreturn(CPUState *env); 146 long do_rt_sigreturn(CPUState *env); 147 148 #ifdef TARGET_I386 149 /* vm86.c */ 150 void save_v86_state(CPUX86State *env); 151 void handle_vm86_trap(CPUX86State *env, int trapno); 152 void handle_vm86_fault(CPUX86State *env); 153 int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr); 154 #endif 155 156 /* mmap.c */ 157 int target_mprotect(target_ulong start, target_ulong len, int prot); 158 long target_mmap(target_ulong start, target_ulong len, int prot, 159 int flags, int fd, target_ulong offset); 160 int target_munmap(target_ulong start, target_ulong len); 161 long target_mremap(target_ulong old_addr, target_ulong old_size, 162 target_ulong new_size, unsigned long flags, 163 target_ulong new_addr); 164 int target_msync(target_ulong start, target_ulong len, int flags); 165 166 /* user access */ 167 168 #define VERIFY_READ 0 169 #define VERIFY_WRITE 1 170 171 #define access_ok(type,addr,size) (1) 172 173 /* NOTE get_user and put_user use host addresses. */ 174 #define __put_user(x,ptr)\ 175 ({\ 176 int size = sizeof(*ptr);\ 177 switch(size) {\ 178 case 1:\ 179 *(uint8_t *)(ptr) = (typeof(*ptr))(x);\ 180 break;\ 181 case 2:\ 182 *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\ 183 break;\ 184 case 4:\ 185 *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\ 186 break;\ 187 case 8:\ 188 *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\ 189 break;\ 190 default:\ 191 abort();\ 192 }\ 193 0;\ 194 }) 195 196 #define __get_user(x, ptr) \ 197 ({\ 198 int size = sizeof(*ptr);\ 199 switch(size) {\ 200 case 1:\ 201 x = (typeof(*ptr))*(uint8_t *)(ptr);\ 202 break;\ 203 case 2:\ 204 x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\ 205 break;\ 206 case 4:\ 207 x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\ 208 break;\ 209 case 8:\ 210 x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\ 211 break;\ 212 default:\ 213 abort();\ 214 }\ 215 0;\ 216 }) 217 218 #define put_user(x,ptr)\ 219 ({\ 220 int __ret;\ 221 if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\ 222 __ret = __put_user(x, ptr);\ 223 else\ 224 __ret = -EFAULT;\ 225 __ret;\ 226 }) 227 228 #define get_user(x,ptr)\ 229 ({\ 230 int __ret;\ 231 if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\ 232 __ret = __get_user(x, ptr);\ 233 else\ 234 __ret = -EFAULT;\ 235 __ret;\ 236 }) 237 238 /* Functions for accessing guest memory. The tget and tput functions 239 read/write single values, byteswapping as neccessary. The lock_user 240 gets a pointer to a contiguous area of guest memory, but does not perform 241 and byteswapping. lock_user may return either a pointer to the guest 242 memory, or a temporary buffer. */ 243 244 /* Lock an area of guest memory into the host. If copy is true then the 245 host area will have the same contents as the guest. */ 246 static inline void *lock_user(target_ulong guest_addr, long len, int copy) 247 { 248 #ifdef DEBUG_REMAP 249 void *addr; 250 addr = malloc(len); 251 if (copy) 252 memcpy(addr, g2h(guest_addr), len); 253 else 254 memset(addr, 0, len); 255 return addr; 256 #else 257 return g2h(guest_addr); 258 #endif 259 } 260 261 /* Unlock an area of guest memory. The first LEN bytes must be flushed back 262 to guest memory. */ 263 static inline void unlock_user(void *host_addr, target_ulong guest_addr, 264 long len) 265 { 266 #ifdef DEBUG_REMAP 267 if (host_addr == g2h(guest_addr)) 268 return; 269 if (len > 0) 270 memcpy(g2h(guest_addr), host_addr, len); 271 free(host_addr); 272 #endif 273 } 274 275 /* Return the length of a string in target memory. */ 276 static inline int target_strlen(target_ulong ptr) 277 { 278 return strlen(g2h(ptr)); 279 } 280 281 /* Like lock_user but for null terminated strings. */ 282 static inline void *lock_user_string(target_ulong guest_addr) 283 { 284 long len; 285 len = target_strlen(guest_addr) + 1; 286 return lock_user(guest_addr, len, 1); 287 } 288 289 /* Helper macros for locking/ulocking a target struct. */ 290 #define lock_user_struct(host_ptr, guest_addr, copy) \ 291 host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy) 292 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 293 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 294 295 #define tget8(addr) ldub(addr) 296 #define tput8(addr, val) stb(addr, val) 297 #define tget16(addr) lduw(addr) 298 #define tput16(addr, val) stw(addr, val) 299 #define tget32(addr) ldl(addr) 300 #define tput32(addr, val) stl(addr, val) 301 #define tget64(addr) ldq(addr) 302 #define tput64(addr, val) stq(addr, val) 303 #if TARGET_LONG_BITS == 64 304 #define tgetl(addr) ldq(addr) 305 #define tputl(addr, val) stq(addr, val) 306 #else 307 #define tgetl(addr) ldl(addr) 308 #define tputl(addr, val) stl(addr, val) 309 #endif 310 311 #endif /* QEMU_H */ 312