2 * qemu bsd user mode definition
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "exec/cpu_ldst.h"
26 #endif /* DEBUG_REMAP */
28 #include "exec/user/abitypes.h"
35 extern enum BSDType bsd_type
;
37 #include "syscall_defs.h"
38 #include "target_syscall.h"
39 #include "target_signal.h"
40 #include "exec/gdbstub.h"
42 #if defined(CONFIG_USE_NPTL)
43 #define THREAD __thread
48 /* This struct is used to hold certain information about the image.
49 * Basically, it replicates in user space what would be certain
50 * task_struct fields in the kernel
63 abi_ulong start_stack
;
65 abi_ulong code_offset
;
66 abi_ulong data_offset
;
70 #define MAX_SIGQUEUE_SIZE 1024
73 struct sigqueue
*next
;
74 //target_siginfo_t info;
77 struct emulated_sigtable
{
78 int pending
; /* true if signal is pending */
79 struct sigqueue
*first
;
80 struct sigqueue info
; /* in order to always have memory for the
81 first signal, we put it here */
84 /* NOTE: we force a big alignment so that the stack stored after is
86 typedef struct TaskState
{
87 struct TaskState
*next
;
88 int used
; /* non zero if used */
89 struct image_info
*info
;
91 struct emulated_sigtable sigtab
[TARGET_NSIG
];
92 struct sigqueue sigqueue_table
[MAX_SIGQUEUE_SIZE
]; /* siginfo queue */
93 struct sigqueue
*first_free
; /* first free siginfo queue entry */
94 int signal_pending
; /* non zero if a signal may be pending */
97 } __attribute__((aligned(16))) TaskState
;
99 void init_task_state(TaskState
*ts
);
100 extern const char *qemu_uname_release
;
101 extern unsigned long mmap_min_addr
;
103 /* ??? See if we can avoid exposing so much of the loader internals. */
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!
109 #define MAX_ARG_PAGES 32
112 * This structure is used to hold the arguments that are
113 * used when loading binaries.
115 struct linux_binprm
{
117 void *page
[MAX_ARG_PAGES
];
123 char * filename
; /* Name of binary */
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
);
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
);
138 abi_long
memcpy_to_target(abi_ulong dest
, const void *src
,
140 void target_set_brk(abi_ulong new_brk
);
141 abi_long
do_brk(abi_ulong new_brk
);
142 void syscall_init(void);
143 abi_long
do_freebsd_syscall(void *cpu_env
, int num
, abi_long arg1
,
144 abi_long arg2
, abi_long arg3
, abi_long arg4
,
145 abi_long arg5
, abi_long arg6
, abi_long arg7
,
147 abi_long
do_netbsd_syscall(void *cpu_env
, int num
, abi_long arg1
,
148 abi_long arg2
, abi_long arg3
, abi_long arg4
,
149 abi_long arg5
, abi_long arg6
);
150 abi_long
do_openbsd_syscall(void *cpu_env
, int num
, abi_long arg1
,
151 abi_long arg2
, abi_long arg3
, abi_long arg4
,
152 abi_long arg5
, abi_long arg6
);
153 void gemu_log(const char *fmt
, ...) GCC_FMT_ATTR(1, 2);
154 extern THREAD CPUState
*thread_cpu
;
155 void QEMU_NORETURN
cpu_loop(CPUArchState
*env
);
156 char *target_strerror(int err
);
157 int get_osversion(void);
158 void fork_start(void);
159 void fork_end(int child
);
161 #include "qemu/log.h"
168 void (*call
)(const struct syscallname
*,
169 abi_long
, abi_long
, abi_long
,
170 abi_long
, abi_long
, abi_long
);
171 void (*result
)(const struct syscallname
*, abi_long
);
175 print_freebsd_syscall(int num
,
176 abi_long arg1
, abi_long arg2
, abi_long arg3
,
177 abi_long arg4
, abi_long arg5
, abi_long arg6
);
178 void print_freebsd_syscall_ret(int num
, abi_long ret
);
180 print_netbsd_syscall(int num
,
181 abi_long arg1
, abi_long arg2
, abi_long arg3
,
182 abi_long arg4
, abi_long arg5
, abi_long arg6
);
183 void print_netbsd_syscall_ret(int num
, abi_long ret
);
185 print_openbsd_syscall(int num
,
186 abi_long arg1
, abi_long arg2
, abi_long arg3
,
187 abi_long arg4
, abi_long arg5
, abi_long arg6
);
188 void print_openbsd_syscall_ret(int num
, abi_long ret
);
189 extern int do_strace
;
192 void process_pending_signals(CPUArchState
*cpu_env
);
193 void signal_init(void);
194 //int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info);
195 //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
196 //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
197 long do_sigreturn(CPUArchState
*env
);
198 long do_rt_sigreturn(CPUArchState
*env
);
199 abi_long
do_sigaltstack(abi_ulong uss_addr
, abi_ulong uoss_addr
, abi_ulong sp
);
202 int target_mprotect(abi_ulong start
, abi_ulong len
, int prot
);
203 abi_long
target_mmap(abi_ulong start
, abi_ulong len
, int prot
,
204 int flags
, int fd
, abi_ulong offset
);
205 int target_munmap(abi_ulong start
, abi_ulong len
);
206 abi_long
target_mremap(abi_ulong old_addr
, abi_ulong old_size
,
207 abi_ulong new_size
, unsigned long flags
,
209 int target_msync(abi_ulong start
, abi_ulong len
, int flags
);
210 extern unsigned long last_brk
;
211 void cpu_list_lock(void);
212 void cpu_list_unlock(void);
213 #if defined(CONFIG_USE_NPTL)
214 void mmap_fork_start(void);
215 void mmap_fork_end(int child
);
219 extern unsigned long x86_stack_size
;
223 #define VERIFY_READ 0
224 #define VERIFY_WRITE 1 /* implies read access */
226 static inline int access_ok(int type
, abi_ulong addr
, abi_ulong size
)
228 return page_check_range((target_ulong
)addr
, size
,
229 (type
== VERIFY_READ
) ? PAGE_READ
: (PAGE_READ
| PAGE_WRITE
)) == 0;
232 /* NOTE __get_user and __put_user use host pointers and don't check access. */
233 /* These are usually used to access struct data members once the
234 * struct has been locked - usually with lock_user_struct().
236 #define __put_user(x, hptr)\
238 int size = sizeof(*hptr);\
241 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
244 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
247 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
250 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
258 #define __get_user(x, hptr) \
260 int size = sizeof(*hptr);\
263 x = (typeof(*hptr))*(uint8_t *)(hptr);\
266 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
269 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
272 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
282 /* put_user()/get_user() take a guest address and check access */
283 /* These are usually used to access an atomic data type, such as an int,
284 * that has been passed by address. These internally perform locking
285 * and unlocking on the data type.
287 #define put_user(x, gaddr, target_type) \
289 abi_ulong __gaddr = (gaddr); \
290 target_type *__hptr; \
292 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
293 __ret = __put_user((x), __hptr); \
294 unlock_user(__hptr, __gaddr, sizeof(target_type)); \
296 __ret = -TARGET_EFAULT; \
300 #define get_user(x, gaddr, target_type) \
302 abi_ulong __gaddr = (gaddr); \
303 target_type *__hptr; \
305 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
306 __ret = __get_user((x), __hptr); \
307 unlock_user(__hptr, __gaddr, 0); \
309 /* avoid warning */ \
311 __ret = -TARGET_EFAULT; \
316 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
317 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
318 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
319 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
320 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
321 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
322 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
323 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
324 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
325 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
327 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
328 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
329 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
330 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
331 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
332 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
333 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
334 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
335 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
336 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
338 /* copy_from_user() and copy_to_user() are usually used to copy data
339 * buffers between the target and host. These internally perform
340 * locking/unlocking of the memory.
342 abi_long
copy_from_user(void *hptr
, abi_ulong gaddr
, size_t len
);
343 abi_long
copy_to_user(abi_ulong gaddr
, void *hptr
, size_t len
);
345 /* Functions for accessing guest memory. The tget and tput functions
346 read/write single values, byteswapping as necessary. The lock_user function
347 gets a pointer to a contiguous area of guest memory, but does not perform
348 any byteswapping. lock_user may return either a pointer to the guest
349 memory, or a temporary buffer. */
351 /* Lock an area of guest memory into the host. If copy is true then the
352 host area will have the same contents as the guest. */
353 static inline void *lock_user(int type
, abi_ulong guest_addr
, long len
, int copy
)
355 if (!access_ok(type
, guest_addr
, len
))
362 memcpy(addr
, g2h(guest_addr
), len
);
364 memset(addr
, 0, len
);
368 return g2h(guest_addr
);
372 /* Unlock an area of guest memory. The first LEN bytes must be
373 flushed back to guest memory. host_ptr = NULL is explicitly
374 allowed and does nothing. */
375 static inline void unlock_user(void *host_ptr
, abi_ulong guest_addr
,
382 if (host_ptr
== g2h(guest_addr
))
385 memcpy(g2h(guest_addr
), host_ptr
, len
);
390 /* Return the length of a string in target memory or -TARGET_EFAULT if
392 abi_long
target_strlen(abi_ulong gaddr
);
394 /* Like lock_user but for null terminated strings. */
395 static inline void *lock_user_string(abi_ulong guest_addr
)
398 len
= target_strlen(guest_addr
);
401 return lock_user(VERIFY_READ
, guest_addr
, (long)(len
+ 1), 1);
404 /* Helper macros for locking/unlocking a target struct. */
405 #define lock_user_struct(type, host_ptr, guest_addr, copy) \
406 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
407 #define unlock_user_struct(host_ptr, guest_addr, copy) \
408 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
410 #if defined(CONFIG_USE_NPTL)