Fix vga on PPC
[qemu/mini2440.git] / linux-user / qemu.h
blob9fddd0519ca011aba38f8baee1bca0ffb359073d
1 #ifndef QEMU_H
2 #define QEMU_H
4 #include <signal.h>
5 #include <string.h>
7 #include "cpu.h"
9 #undef DEBUG_REMAP
10 #ifdef DEBUG_REMAP
11 #include <stdlib.h>
12 #endif /* DEBUG_REMAP */
14 #include "qemu-types.h"
16 #include "thunk.h"
17 #include "syscall_defs.h"
18 #include "syscall.h"
19 #include "target_signal.h"
20 #include "gdbstub.h"
22 #if defined(USE_NPTL)
23 #define THREAD __thread
24 #else
25 #define THREAD
26 #endif
28 /* This struct is used to hold certain information about the image.
29 * Basically, it replicates in user space what would be certain
30 * task_struct fields in the kernel
32 struct image_info {
33 abi_ulong load_addr;
34 abi_ulong start_code;
35 abi_ulong end_code;
36 abi_ulong start_data;
37 abi_ulong end_data;
38 abi_ulong start_brk;
39 abi_ulong brk;
40 abi_ulong start_mmap;
41 abi_ulong mmap;
42 abi_ulong rss;
43 abi_ulong start_stack;
44 abi_ulong entry;
45 abi_ulong code_offset;
46 abi_ulong data_offset;
47 char **host_argv;
48 int personality;
51 #ifdef TARGET_I386
52 /* Information about the current linux thread */
53 struct vm86_saved_state {
54 uint32_t eax; /* return code */
55 uint32_t ebx;
56 uint32_t ecx;
57 uint32_t edx;
58 uint32_t esi;
59 uint32_t edi;
60 uint32_t ebp;
61 uint32_t esp;
62 uint32_t eflags;
63 uint32_t eip;
64 uint16_t cs, ss, ds, es, fs, gs;
66 #endif
68 #ifdef TARGET_ARM
69 /* FPU emulator */
70 #include "nwfpe/fpa11.h"
71 #endif
73 #define MAX_SIGQUEUE_SIZE 1024
75 struct sigqueue {
76 struct sigqueue *next;
77 target_siginfo_t info;
80 struct emulated_sigtable {
81 int pending; /* true if signal is pending */
82 struct sigqueue *first;
83 struct sigqueue info; /* in order to always have memory for the
84 first signal, we put it here */
87 /* NOTE: we force a big alignment so that the stack stored after is
88 aligned too */
89 typedef struct TaskState {
90 struct TaskState *next;
91 #ifdef TARGET_ARM
92 /* FPA state */
93 FPA11 fpa;
94 int swi_errno;
95 #endif
96 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
97 abi_ulong target_v86;
98 struct vm86_saved_state vm86_saved_regs;
99 struct target_vm86plus_struct vm86plus;
100 uint32_t v86flags;
101 uint32_t v86mask;
102 #endif
103 #ifdef TARGET_M68K
104 int sim_syscalls;
105 #endif
106 #if defined(TARGET_ARM) || defined(TARGET_M68K)
107 /* Extra fields for semihosted binaries. */
108 uint32_t stack_base;
109 uint32_t heap_base;
110 uint32_t heap_limit;
111 #endif
112 int used; /* non zero if used */
113 struct image_info *info;
115 struct emulated_sigtable sigtab[TARGET_NSIG];
116 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
117 struct sigqueue *first_free; /* first free siginfo queue entry */
118 int signal_pending; /* non zero if a signal may be pending */
120 uint8_t stack[0];
121 } __attribute__((aligned(16))) TaskState;
123 void init_task_state(TaskState *ts);
124 extern const char *qemu_uname_release;
126 /* ??? See if we can avoid exposing so much of the loader internals. */
128 * MAX_ARG_PAGES defines the number of pages allocated for arguments
129 * and envelope for the new program. 32 should suffice, this gives
130 * a maximum env+arg of 128kB w/4KB pages!
132 #define MAX_ARG_PAGES 32
135 * This structure is used to hold the arguments that are
136 * used when loading binaries.
138 struct linux_binprm {
139 char buf[128];
140 void *page[MAX_ARG_PAGES];
141 abi_ulong p;
142 int fd;
143 int e_uid, e_gid;
144 int argc, envc;
145 char **argv;
146 char **envp;
147 char * filename; /* Name of binary */
150 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
151 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
152 abi_ulong stringp, int push_ptr);
153 int loader_exec(const char * filename, char ** argv, char ** envp,
154 struct target_pt_regs * regs, struct image_info *infop);
156 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
157 struct image_info * info);
158 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
159 struct image_info * info);
160 #ifdef TARGET_HAS_ELFLOAD32
161 int load_elf_binary_multi(struct linux_binprm *bprm,
162 struct target_pt_regs *regs,
163 struct image_info *info);
164 #endif
166 abi_long memcpy_to_target(abi_ulong dest, const void *src,
167 unsigned long len);
168 void target_set_brk(abi_ulong new_brk);
169 abi_long do_brk(abi_ulong new_brk);
170 void syscall_init(void);
171 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
172 abi_long arg2, abi_long arg3, abi_long arg4,
173 abi_long arg5, abi_long arg6);
174 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
175 extern THREAD CPUState *thread_env;
176 void cpu_loop(CPUState *env);
177 void init_paths(const char *prefix);
178 const char *path(const char *pathname);
179 char *target_strerror(int err);
180 int get_osversion(void);
181 void fork_start(void);
182 void fork_end(int child);
184 #include "qemu-log.h"
186 /* strace.c */
187 void print_syscall(int num,
188 abi_long arg1, abi_long arg2, abi_long arg3,
189 abi_long arg4, abi_long arg5, abi_long arg6);
190 void print_syscall_ret(int num, abi_long arg1);
191 extern int do_strace;
193 /* signal.c */
194 void process_pending_signals(CPUState *cpu_env);
195 void signal_init(void);
196 int queue_signal(CPUState *env, int sig, target_siginfo_t *info);
197 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
198 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
199 int target_to_host_signal(int sig);
200 long do_sigreturn(CPUState *env);
201 long do_rt_sigreturn(CPUState *env);
202 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
204 #ifdef TARGET_I386
205 /* vm86.c */
206 void save_v86_state(CPUX86State *env);
207 void handle_vm86_trap(CPUX86State *env, int trapno);
208 void handle_vm86_fault(CPUX86State *env);
209 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
210 #elif defined(TARGET_SPARC64)
211 void sparc64_set_context(CPUSPARCState *env);
212 void sparc64_get_context(CPUSPARCState *env);
213 #endif
215 /* mmap.c */
216 int target_mprotect(abi_ulong start, abi_ulong len, int prot);
217 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
218 int flags, int fd, abi_ulong offset);
219 int target_munmap(abi_ulong start, abi_ulong len);
220 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
221 abi_ulong new_size, unsigned long flags,
222 abi_ulong new_addr);
223 int target_msync(abi_ulong start, abi_ulong len, int flags);
224 extern unsigned long last_brk;
225 void mmap_lock(void);
226 void mmap_unlock(void);
227 #if defined(USE_NPTL)
228 void mmap_fork_start(void);
229 void mmap_fork_end(int child);
230 #endif
232 /* main.c */
233 extern unsigned long x86_stack_size;
235 /* user access */
237 #define VERIFY_READ 0
238 #define VERIFY_WRITE 1 /* implies read access */
240 static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
242 return page_check_range((target_ulong)addr, size,
243 (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
246 /* NOTE __get_user and __put_user use host pointers and don't check access. */
247 /* These are usually used to access struct data members once the
248 * struct has been locked - usually with lock_user_struct().
250 #define __put_user(x, hptr)\
252 int size = sizeof(*hptr);\
253 switch(size) {\
254 case 1:\
255 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
256 break;\
257 case 2:\
258 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
259 break;\
260 case 4:\
261 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
262 break;\
263 case 8:\
264 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
265 break;\
266 default:\
267 abort();\
272 #define __get_user(x, hptr) \
274 int size = sizeof(*hptr);\
275 switch(size) {\
276 case 1:\
277 x = (typeof(*hptr))*(uint8_t *)(hptr);\
278 break;\
279 case 2:\
280 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
281 break;\
282 case 4:\
283 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
284 break;\
285 case 8:\
286 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
287 break;\
288 default:\
289 /* avoid warning */\
290 x = 0;\
291 abort();\
296 /* put_user()/get_user() take a guest address and check access */
297 /* These are usually used to access an atomic data type, such as an int,
298 * that has been passed by address. These internally perform locking
299 * and unlocking on the data type.
301 #define put_user(x, gaddr, target_type) \
302 ({ \
303 abi_ulong __gaddr = (gaddr); \
304 target_type *__hptr; \
305 abi_long __ret; \
306 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
307 __ret = __put_user((x), __hptr); \
308 unlock_user(__hptr, __gaddr, sizeof(target_type)); \
309 } else \
310 __ret = -TARGET_EFAULT; \
311 __ret; \
314 #define get_user(x, gaddr, target_type) \
315 ({ \
316 abi_ulong __gaddr = (gaddr); \
317 target_type *__hptr; \
318 abi_long __ret; \
319 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
320 __ret = __get_user((x), __hptr); \
321 unlock_user(__hptr, __gaddr, 0); \
322 } else { \
323 /* avoid warning */ \
324 (x) = 0; \
325 __ret = -TARGET_EFAULT; \
327 __ret; \
330 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
331 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
332 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
333 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
334 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
335 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
336 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
337 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
338 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
339 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
341 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
342 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
343 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
344 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
345 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
346 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
347 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
348 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
349 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
350 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
352 /* copy_from_user() and copy_to_user() are usually used to copy data
353 * buffers between the target and host. These internally perform
354 * locking/unlocking of the memory.
356 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
357 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
359 /* Functions for accessing guest memory. The tget and tput functions
360 read/write single values, byteswapping as neccessary. The lock_user
361 gets a pointer to a contiguous area of guest memory, but does not perform
362 and byteswapping. lock_user may return either a pointer to the guest
363 memory, or a temporary buffer. */
365 /* Lock an area of guest memory into the host. If copy is true then the
366 host area will have the same contents as the guest. */
367 static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
369 if (!access_ok(type, guest_addr, len))
370 return NULL;
371 #ifdef DEBUG_REMAP
373 void *addr;
374 addr = malloc(len);
375 if (copy)
376 memcpy(addr, g2h(guest_addr), len);
377 else
378 memset(addr, 0, len);
379 return addr;
381 #else
382 return g2h(guest_addr);
383 #endif
386 /* Unlock an area of guest memory. The first LEN bytes must be
387 flushed back to guest memory. host_ptr = NULL is explicitly
388 allowed and does nothing. */
389 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
390 long len)
393 #ifdef DEBUG_REMAP
394 if (!host_ptr)
395 return;
396 if (host_ptr == g2h(guest_addr))
397 return;
398 if (len > 0)
399 memcpy(g2h(guest_addr), host_ptr, len);
400 free(host_ptr);
401 #endif
404 /* Return the length of a string in target memory or -TARGET_EFAULT if
405 access error. */
406 abi_long target_strlen(abi_ulong gaddr);
408 /* Like lock_user but for null terminated strings. */
409 static inline void *lock_user_string(abi_ulong guest_addr)
411 abi_long len;
412 len = target_strlen(guest_addr);
413 if (len < 0)
414 return NULL;
415 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
418 /* Helper macros for locking/ulocking a target struct. */
419 #define lock_user_struct(type, host_ptr, guest_addr, copy) \
420 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
421 #define unlock_user_struct(host_ptr, guest_addr, copy) \
422 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
424 #if defined(USE_NPTL)
425 #include <pthread.h>
426 #endif
428 #endif /* QEMU_H */