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1.1 root 1: #ifndef QEMU_H
2: #define QEMU_H
3:
4: #include <signal.h>
5: #include <string.h>
6:
7: #include "cpu.h"
8:
9: #undef DEBUG_REMAP
10: #ifdef DEBUG_REMAP
11: #include <stdlib.h>
12: #endif /* DEBUG_REMAP */
13:
14: #include "qemu-types.h"
15:
16: enum BSDType {
17: target_freebsd,
18: target_netbsd,
19: target_openbsd,
20: };
21:
22: #include "syscall_defs.h"
23: #include "syscall.h"
24: #include "target_signal.h"
25: #include "gdbstub.h"
26:
27: #if defined(USE_NPTL)
28: #define THREAD __thread
29: #else
30: #define THREAD
31: #endif
32:
33: /* This struct is used to hold certain information about the image.
34: * Basically, it replicates in user space what would be certain
35: * task_struct fields in the kernel
36: */
37: struct image_info {
38: abi_ulong load_addr;
39: abi_ulong start_code;
40: abi_ulong end_code;
41: abi_ulong start_data;
42: abi_ulong end_data;
43: abi_ulong start_brk;
44: abi_ulong brk;
45: abi_ulong start_mmap;
46: abi_ulong mmap;
47: abi_ulong rss;
48: abi_ulong start_stack;
49: abi_ulong entry;
50: abi_ulong code_offset;
51: abi_ulong data_offset;
52: char **host_argv;
53: int personality;
54: };
55:
56: #define MAX_SIGQUEUE_SIZE 1024
57:
58: struct sigqueue {
59: struct sigqueue *next;
60: //target_siginfo_t info;
61: };
62:
63: struct emulated_sigtable {
64: int pending; /* true if signal is pending */
65: struct sigqueue *first;
66: struct sigqueue info; /* in order to always have memory for the
67: first signal, we put it here */
68: };
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: int used; /* non zero if used */
75: struct image_info *info;
76:
77: struct emulated_sigtable sigtab[TARGET_NSIG];
78: struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
79: struct sigqueue *first_free; /* first free siginfo queue entry */
80: int signal_pending; /* non zero if a signal may be pending */
81:
82: uint8_t stack[0];
83: } __attribute__((aligned(16))) TaskState;
84:
85: void init_task_state(TaskState *ts);
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: abi_ulong 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: abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
114: abi_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: abi_long memcpy_to_target(abi_ulong dest, const void *src,
124: unsigned long len);
125: void target_set_brk(abi_ulong new_brk);
126: abi_long do_brk(abi_ulong new_brk);
127: void syscall_init(void);
128: abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
129: abi_long arg2, abi_long arg3, abi_long arg4,
130: abi_long arg5, abi_long arg6);
131: abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
132: abi_long arg2, abi_long arg3, abi_long arg4,
133: abi_long arg5, abi_long arg6);
134: abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
135: abi_long arg2, abi_long arg3, abi_long arg4,
136: abi_long arg5, abi_long arg6);
137: void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
138: extern THREAD CPUState *thread_env;
139: void cpu_loop(CPUState *env, enum BSDType bsd_type);
140: void init_paths(const char *prefix);
141: const char *path(const char *pathname);
142: char *target_strerror(int err);
143: int get_osversion(void);
144: void fork_start(void);
145: void fork_end(int child);
146:
147: #include "qemu-log.h"
148:
149: /* strace.c */
150: void
151: print_freebsd_syscall(int num,
152: abi_long arg1, abi_long arg2, abi_long arg3,
153: abi_long arg4, abi_long arg5, abi_long arg6);
154: void print_freebsd_syscall_ret(int num, abi_long ret);
155: void
156: print_netbsd_syscall(int num,
157: abi_long arg1, abi_long arg2, abi_long arg3,
158: abi_long arg4, abi_long arg5, abi_long arg6);
159: void print_netbsd_syscall_ret(int num, abi_long ret);
160: void
161: print_openbsd_syscall(int num,
162: abi_long arg1, abi_long arg2, abi_long arg3,
163: abi_long arg4, abi_long arg5, abi_long arg6);
164: void print_openbsd_syscall_ret(int num, abi_long ret);
165: extern int do_strace;
166:
167: /* signal.c */
168: void process_pending_signals(CPUState *cpu_env);
169: void signal_init(void);
170: //int queue_signal(CPUState *env, int sig, target_siginfo_t *info);
171: //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
172: //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
173: long do_sigreturn(CPUState *env);
174: long do_rt_sigreturn(CPUState *env);
175: abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
176:
177: /* mmap.c */
178: int target_mprotect(abi_ulong start, abi_ulong len, int prot);
179: abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
180: int flags, int fd, abi_ulong offset);
181: int target_munmap(abi_ulong start, abi_ulong len);
182: abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
183: abi_ulong new_size, unsigned long flags,
184: abi_ulong new_addr);
185: int target_msync(abi_ulong start, abi_ulong len, int flags);
186: extern unsigned long last_brk;
187: void mmap_lock(void);
188: void mmap_unlock(void);
189: #if defined(USE_NPTL)
190: void mmap_fork_start(void);
191: void mmap_fork_end(int child);
192: #endif
193:
194: /* user access */
195:
196: #define VERIFY_READ 0
197: #define VERIFY_WRITE 1 /* implies read access */
198:
199: static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
200: {
201: return page_check_range((target_ulong)addr, size,
202: (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
203: }
204:
205: /* NOTE __get_user and __put_user use host pointers and don't check access. */
206: /* These are usually used to access struct data members once the
207: * struct has been locked - usually with lock_user_struct().
208: */
209: #define __put_user(x, hptr)\
210: ({\
211: int size = sizeof(*hptr);\
212: switch(size) {\
213: case 1:\
214: *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
215: break;\
216: case 2:\
217: *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
218: break;\
219: case 4:\
220: *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
221: break;\
222: case 8:\
223: *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
224: break;\
225: default:\
226: abort();\
227: }\
228: 0;\
229: })
230:
231: #define __get_user(x, hptr) \
232: ({\
233: int size = sizeof(*hptr);\
234: switch(size) {\
235: case 1:\
236: x = (typeof(*hptr))*(uint8_t *)(hptr);\
237: break;\
238: case 2:\
239: x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
240: break;\
241: case 4:\
242: x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
243: break;\
244: case 8:\
245: x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
246: break;\
247: default:\
248: /* avoid warning */\
249: x = 0;\
250: abort();\
251: }\
252: 0;\
253: })
254:
255: /* put_user()/get_user() take a guest address and check access */
256: /* These are usually used to access an atomic data type, such as an int,
257: * that has been passed by address. These internally perform locking
258: * and unlocking on the data type.
259: */
260: #define put_user(x, gaddr, target_type) \
261: ({ \
262: abi_ulong __gaddr = (gaddr); \
263: target_type *__hptr; \
264: abi_long __ret; \
265: if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
266: __ret = __put_user((x), __hptr); \
267: unlock_user(__hptr, __gaddr, sizeof(target_type)); \
268: } else \
269: __ret = -TARGET_EFAULT; \
270: __ret; \
271: })
272:
273: #define get_user(x, gaddr, target_type) \
274: ({ \
275: abi_ulong __gaddr = (gaddr); \
276: target_type *__hptr; \
277: abi_long __ret; \
278: if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
279: __ret = __get_user((x), __hptr); \
280: unlock_user(__hptr, __gaddr, 0); \
281: } else { \
282: /* avoid warning */ \
283: (x) = 0; \
284: __ret = -TARGET_EFAULT; \
285: } \
286: __ret; \
287: })
288:
289: #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
290: #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
291: #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
292: #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
293: #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
294: #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
295: #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
296: #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
297: #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
298: #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
299:
300: #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
301: #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
302: #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
303: #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
304: #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
305: #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
306: #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
307: #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
308: #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
309: #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
310:
311: /* copy_from_user() and copy_to_user() are usually used to copy data
312: * buffers between the target and host. These internally perform
313: * locking/unlocking of the memory.
314: */
315: abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
316: abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
317:
318: /* Functions for accessing guest memory. The tget and tput functions
319: read/write single values, byteswapping as neccessary. The lock_user
320: gets a pointer to a contiguous area of guest memory, but does not perform
321: and byteswapping. lock_user may return either a pointer to the guest
322: memory, or a temporary buffer. */
323:
324: /* Lock an area of guest memory into the host. If copy is true then the
325: host area will have the same contents as the guest. */
326: static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
327: {
328: if (!access_ok(type, guest_addr, len))
329: return NULL;
330: #ifdef DEBUG_REMAP
331: {
332: void *addr;
333: addr = malloc(len);
334: if (copy)
335: memcpy(addr, g2h(guest_addr), len);
336: else
337: memset(addr, 0, len);
338: return addr;
339: }
340: #else
341: return g2h(guest_addr);
342: #endif
343: }
344:
345: /* Unlock an area of guest memory. The first LEN bytes must be
346: flushed back to guest memory. host_ptr = NULL is explicitly
347: allowed and does nothing. */
348: static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
349: long len)
350: {
351:
352: #ifdef DEBUG_REMAP
353: if (!host_ptr)
354: return;
355: if (host_ptr == g2h(guest_addr))
356: return;
357: if (len > 0)
358: memcpy(g2h(guest_addr), host_ptr, len);
359: free(host_ptr);
360: #endif
361: }
362:
363: /* Return the length of a string in target memory or -TARGET_EFAULT if
364: access error. */
365: abi_long target_strlen(abi_ulong gaddr);
366:
367: /* Like lock_user but for null terminated strings. */
368: static inline void *lock_user_string(abi_ulong guest_addr)
369: {
370: abi_long len;
371: len = target_strlen(guest_addr);
372: if (len < 0)
373: return NULL;
374: return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
375: }
376:
377: /* Helper macros for locking/ulocking a target struct. */
378: #define lock_user_struct(type, host_ptr, guest_addr, copy) \
379: (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
380: #define unlock_user_struct(host_ptr, guest_addr, copy) \
381: unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
382:
383: #if defined(USE_NPTL)
384: #include <pthread.h>
385: #endif
386:
387: #endif /* QEMU_H */
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