8 #include "syscall_defs.h"
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
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;
25 unsigned long start_mmap;
28 unsigned long start_stack;
30 target_ulong code_offset;
31 target_ulong data_offset;
37 /* Information about the current linux thread */
38 struct vm86_saved_state {
39 uint32_t eax; /* return code */
49 uint16_t cs, ss, ds, es, fs, gs;
55 #include "nwfpe/fpa11.h"
58 /* NOTE: we force a big alignment so that the stack stored after is
60 typedef struct TaskState {
61 struct TaskState *next;
65 /* Extra fields for semihosted binaries. */
71 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
72 target_ulong target_v86;
73 struct vm86_saved_state vm86_saved_regs;
74 struct target_vm86plus_struct vm86plus;
81 int used; /* non zero if used */
82 struct image_info *info;
84 } __attribute__((aligned(16))) TaskState;
86 extern TaskState *first_task_state;
87 extern const char *qemu_uname_release;
89 /* ??? See if we can avoid exposing so much of the loader internals. */
91 * MAX_ARG_PAGES defines the number of pages allocated for arguments
92 * and envelope for the new program. 32 should suffice, this gives
93 * a maximum env+arg of 128kB w/4KB pages!
95 #define MAX_ARG_PAGES 32
98 * This structure is used to hold the arguments that are
99 * used when loading binaries.
101 struct linux_binprm {
103 void *page[MAX_ARG_PAGES];
110 char * filename; /* Name of binary */
113 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
114 target_ulong loader_build_argptr(int envc, int argc, target_ulong sp,
115 target_ulong stringp, int push_ptr);
116 int loader_exec(const char * filename, char ** argv, char ** envp,
117 struct target_pt_regs * regs, struct image_info *infop);
119 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
120 struct image_info * info);
121 int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
122 struct image_info * info);
124 void memcpy_to_target(target_ulong dest, const void *src,
126 void target_set_brk(target_ulong new_brk);
127 long do_brk(target_ulong new_brk);
128 void syscall_init(void);
129 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
130 long arg4, long arg5, long arg6);
131 void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
132 extern CPUState *global_env;
133 void cpu_loop(CPUState *env);
134 void init_paths(const char *prefix);
135 const char *path(const char *pathname);
138 extern FILE *logfile;
141 void process_pending_signals(void *cpu_env);
142 void signal_init(void);
143 int queue_signal(int sig, target_siginfo_t *info);
144 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
145 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
146 long do_sigreturn(CPUState *env);
147 long do_rt_sigreturn(CPUState *env);
151 void save_v86_state(CPUX86State *env);
152 void handle_vm86_trap(CPUX86State *env, int trapno);
153 void handle_vm86_fault(CPUX86State *env);
154 int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
158 int target_mprotect(target_ulong start, target_ulong len, int prot);
159 long target_mmap(target_ulong start, target_ulong len, int prot,
160 int flags, int fd, target_ulong offset);
161 int target_munmap(target_ulong start, target_ulong len);
162 long target_mremap(target_ulong old_addr, target_ulong old_size,
163 target_ulong new_size, unsigned long flags,
164 target_ulong new_addr);
165 int target_msync(target_ulong start, target_ulong len, int flags);
169 #define VERIFY_READ 0
170 #define VERIFY_WRITE 1
172 #define access_ok(type,addr,size) (1)
174 /* NOTE get_user and put_user use host addresses. */
175 #define __put_user(x,ptr)\
177 int size = sizeof(*ptr);\
180 *(uint8_t *)(ptr) = (typeof(*ptr))(x);\
183 *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
186 *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
189 *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
197 #define __get_user(x, ptr) \
199 int size = sizeof(*ptr);\
202 x = (typeof(*ptr))*(uint8_t *)(ptr);\
205 x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
208 x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
211 x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
219 #define put_user(x,ptr)\
222 if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
223 __ret = __put_user(x, ptr);\
229 #define get_user(x,ptr)\
232 if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
233 __ret = __get_user(x, ptr);\
239 /* Functions for accessing guest memory. The tget and tput functions
240 read/write single values, byteswapping as neccessary. The lock_user
241 gets a pointer to a contiguous area of guest memory, but does not perform
242 and byteswapping. lock_user may return either a pointer to the guest
243 memory, or a temporary buffer. */
245 /* Lock an area of guest memory into the host. If copy is true then the
246 host area will have the same contents as the guest. */
247 static inline void *lock_user(target_ulong guest_addr, long len, int copy)
253 memcpy(addr, g2h(guest_addr), len);
255 memset(addr, 0, len);
258 return g2h(guest_addr);
262 /* Unlock an area of guest memory. The first LEN bytes must be flushed back
264 static inline void unlock_user(void *host_addr, target_ulong guest_addr,
268 if (host_addr == g2h(guest_addr))
271 memcpy(g2h(guest_addr), host_addr, len);
276 /* Return the length of a string in target memory. */
277 static inline int target_strlen(target_ulong ptr)
279 return strlen(g2h(ptr));
282 /* Like lock_user but for null terminated strings. */
283 static inline void *lock_user_string(target_ulong guest_addr)
286 len = target_strlen(guest_addr) + 1;
287 return lock_user(guest_addr, len, 1);
290 /* Helper macros for locking/ulocking a target struct. */
291 #define lock_user_struct(host_ptr, guest_addr, copy) \
292 host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
293 #define unlock_user_struct(host_ptr, guest_addr, copy) \
294 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
296 #define tget8(addr) ldub(addr)
297 #define tput8(addr, val) stb(addr, val)
298 #define tget16(addr) lduw(addr)
299 #define tput16(addr, val) stw(addr, val)
300 #define tget32(addr) ldl(addr)
301 #define tput32(addr, val) stl(addr, val)
302 #define tget64(addr) ldq(addr)
303 #define tput64(addr, val) stq(addr, val)
304 #if TARGET_LONG_BITS == 64
305 #define tgetl(addr) ldq(addr)
306 #define tputl(addr, val) stq(addr, val)
308 #define tgetl(addr) ldl(addr)
309 #define tputl(addr, val) stl(addr, val)