Annotation of qemu/bsd-user/qemu.h, revision 1.1.1.4

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: };
1.1.1.3   root       21: extern enum BSDType bsd_type;
1.1       root       22: 
                     23: #include "syscall_defs.h"
                     24: #include "syscall.h"
                     25: #include "target_signal.h"
                     26: #include "gdbstub.h"
                     27: 
1.1.1.3   root       28: #if defined(CONFIG_USE_NPTL)
1.1       root       29: #define THREAD __thread
                     30: #else
                     31: #define THREAD
                     32: #endif
                     33: 
                     34: /* This struct is used to hold certain information about the image.
                     35:  * Basically, it replicates in user space what would be certain
                     36:  * task_struct fields in the kernel
                     37:  */
                     38: struct image_info {
                     39:     abi_ulong load_addr;
                     40:     abi_ulong start_code;
                     41:     abi_ulong end_code;
                     42:     abi_ulong start_data;
                     43:     abi_ulong end_data;
                     44:     abi_ulong start_brk;
                     45:     abi_ulong brk;
                     46:     abi_ulong start_mmap;
                     47:     abi_ulong mmap;
                     48:     abi_ulong rss;
                     49:     abi_ulong start_stack;
                     50:     abi_ulong entry;
                     51:     abi_ulong code_offset;
                     52:     abi_ulong data_offset;
                     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;
1.1.1.3   root       87: #if defined(CONFIG_USE_GUEST_BASE)
                     88: extern unsigned long mmap_min_addr;
                     89: #endif
1.1       root       90: 
                     91: /* ??? See if we can avoid exposing so much of the loader internals.  */
                     92: /*
                     93:  * MAX_ARG_PAGES defines the number of pages allocated for arguments
                     94:  * and envelope for the new program. 32 should suffice, this gives
                     95:  * a maximum env+arg of 128kB w/4KB pages!
                     96:  */
                     97: #define MAX_ARG_PAGES 32
                     98: 
                     99: /*
                    100:  * This structure is used to hold the arguments that are
                    101:  * used when loading binaries.
                    102:  */
                    103: struct linux_binprm {
                    104:         char buf[128];
                    105:         void *page[MAX_ARG_PAGES];
                    106:         abi_ulong p;
                    107:         int fd;
                    108:         int e_uid, e_gid;
                    109:         int argc, envc;
                    110:         char **argv;
                    111:         char **envp;
                    112:         char * filename;        /* Name of binary */
                    113: };
                    114: 
                    115: void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
                    116: abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
                    117:                               abi_ulong stringp, int push_ptr);
                    118: int loader_exec(const char * filename, char ** argv, char ** envp,
                    119:              struct target_pt_regs * regs, struct image_info *infop);
                    120: 
                    121: int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                    122:                     struct image_info * info);
                    123: int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                    124:                     struct image_info * info);
                    125: 
                    126: abi_long memcpy_to_target(abi_ulong dest, const void *src,
                    127:                           unsigned long len);
                    128: void target_set_brk(abi_ulong new_brk);
                    129: abi_long do_brk(abi_ulong new_brk);
                    130: void syscall_init(void);
                    131: abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
                    132:                             abi_long arg2, abi_long arg3, abi_long arg4,
1.1.1.3   root      133:                             abi_long arg5, abi_long arg6, abi_long arg7,
                    134:                             abi_long arg8);
1.1       root      135: abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
                    136:                            abi_long arg2, abi_long arg3, abi_long arg4,
                    137:                            abi_long arg5, abi_long arg6);
                    138: abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
                    139:                             abi_long arg2, abi_long arg3, abi_long arg4,
                    140:                             abi_long arg5, abi_long arg6);
1.1.1.4 ! root      141: void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
1.1       root      142: extern THREAD CPUState *thread_env;
1.1.1.3   root      143: void cpu_loop(CPUState *env);
1.1       root      144: char *target_strerror(int err);
                    145: int get_osversion(void);
                    146: void fork_start(void);
                    147: void fork_end(int child);
                    148: 
                    149: #include "qemu-log.h"
                    150: 
                    151: /* strace.c */
                    152: void
                    153: print_freebsd_syscall(int num,
                    154:                       abi_long arg1, abi_long arg2, abi_long arg3,
                    155:                       abi_long arg4, abi_long arg5, abi_long arg6);
                    156: void print_freebsd_syscall_ret(int num, abi_long ret);
                    157: void
                    158: print_netbsd_syscall(int num,
                    159:                      abi_long arg1, abi_long arg2, abi_long arg3,
                    160:                      abi_long arg4, abi_long arg5, abi_long arg6);
                    161: void print_netbsd_syscall_ret(int num, abi_long ret);
                    162: void
                    163: print_openbsd_syscall(int num,
                    164:                       abi_long arg1, abi_long arg2, abi_long arg3,
                    165:                       abi_long arg4, abi_long arg5, abi_long arg6);
                    166: void print_openbsd_syscall_ret(int num, abi_long ret);
                    167: extern int do_strace;
                    168: 
                    169: /* signal.c */
                    170: void process_pending_signals(CPUState *cpu_env);
                    171: void signal_init(void);
                    172: //int queue_signal(CPUState *env, int sig, target_siginfo_t *info);
                    173: //void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
                    174: //void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
                    175: long do_sigreturn(CPUState *env);
                    176: long do_rt_sigreturn(CPUState *env);
                    177: abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
                    178: 
                    179: /* mmap.c */
                    180: int target_mprotect(abi_ulong start, abi_ulong len, int prot);
                    181: abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
                    182:                      int flags, int fd, abi_ulong offset);
                    183: int target_munmap(abi_ulong start, abi_ulong len);
                    184: abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
                    185:                        abi_ulong new_size, unsigned long flags,
                    186:                        abi_ulong new_addr);
                    187: int target_msync(abi_ulong start, abi_ulong len, int flags);
                    188: extern unsigned long last_brk;
                    189: void mmap_lock(void);
                    190: void mmap_unlock(void);
1.1.1.2   root      191: void cpu_list_lock(void);
                    192: void cpu_list_unlock(void);
1.1.1.3   root      193: #if defined(CONFIG_USE_NPTL)
1.1       root      194: void mmap_fork_start(void);
                    195: void mmap_fork_end(int child);
                    196: #endif
                    197: 
1.1.1.2   root      198: /* main.c */
                    199: extern unsigned long x86_stack_size;
                    200: 
1.1       root      201: /* user access */
                    202: 
                    203: #define VERIFY_READ 0
                    204: #define VERIFY_WRITE 1 /* implies read access */
                    205: 
                    206: static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
                    207: {
                    208:     return page_check_range((target_ulong)addr, size,
                    209:                             (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
                    210: }
                    211: 
                    212: /* NOTE __get_user and __put_user use host pointers and don't check access. */
                    213: /* These are usually used to access struct data members once the
                    214:  * struct has been locked - usually with lock_user_struct().
                    215:  */
                    216: #define __put_user(x, hptr)\
                    217: ({\
                    218:     int size = sizeof(*hptr);\
                    219:     switch(size) {\
                    220:     case 1:\
                    221:         *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
                    222:         break;\
                    223:     case 2:\
                    224:         *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
                    225:         break;\
                    226:     case 4:\
                    227:         *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
                    228:         break;\
                    229:     case 8:\
                    230:         *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
                    231:         break;\
                    232:     default:\
                    233:         abort();\
                    234:     }\
                    235:     0;\
                    236: })
                    237: 
                    238: #define __get_user(x, hptr) \
                    239: ({\
                    240:     int size = sizeof(*hptr);\
                    241:     switch(size) {\
                    242:     case 1:\
                    243:         x = (typeof(*hptr))*(uint8_t *)(hptr);\
                    244:         break;\
                    245:     case 2:\
                    246:         x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
                    247:         break;\
                    248:     case 4:\
                    249:         x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
                    250:         break;\
                    251:     case 8:\
                    252:         x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
                    253:         break;\
                    254:     default:\
                    255:         /* avoid warning */\
                    256:         x = 0;\
                    257:         abort();\
                    258:     }\
                    259:     0;\
                    260: })
                    261: 
                    262: /* put_user()/get_user() take a guest address and check access */
                    263: /* These are usually used to access an atomic data type, such as an int,
                    264:  * that has been passed by address.  These internally perform locking
                    265:  * and unlocking on the data type.
                    266:  */
                    267: #define put_user(x, gaddr, target_type)                                 \
                    268: ({                                                                      \
                    269:     abi_ulong __gaddr = (gaddr);                                        \
                    270:     target_type *__hptr;                                                \
                    271:     abi_long __ret;                                                     \
                    272:     if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
                    273:         __ret = __put_user((x), __hptr);                                \
                    274:         unlock_user(__hptr, __gaddr, sizeof(target_type));              \
                    275:     } else                                                              \
                    276:         __ret = -TARGET_EFAULT;                                         \
                    277:     __ret;                                                              \
                    278: })
                    279: 
                    280: #define get_user(x, gaddr, target_type)                                 \
                    281: ({                                                                      \
                    282:     abi_ulong __gaddr = (gaddr);                                        \
                    283:     target_type *__hptr;                                                \
                    284:     abi_long __ret;                                                     \
                    285:     if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
                    286:         __ret = __get_user((x), __hptr);                                \
                    287:         unlock_user(__hptr, __gaddr, 0);                                \
                    288:     } else {                                                            \
                    289:         /* avoid warning */                                             \
                    290:         (x) = 0;                                                        \
                    291:         __ret = -TARGET_EFAULT;                                         \
                    292:     }                                                                   \
                    293:     __ret;                                                              \
                    294: })
                    295: 
                    296: #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
                    297: #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
                    298: #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
                    299: #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
                    300: #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
                    301: #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
                    302: #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
                    303: #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
                    304: #define put_user_u8(x, gaddr)  put_user((x), (gaddr), uint8_t)
                    305: #define put_user_s8(x, gaddr)  put_user((x), (gaddr), int8_t)
                    306: 
                    307: #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
                    308: #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
                    309: #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
                    310: #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
                    311: #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
                    312: #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
                    313: #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
                    314: #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
                    315: #define get_user_u8(x, gaddr)  get_user((x), (gaddr), uint8_t)
                    316: #define get_user_s8(x, gaddr)  get_user((x), (gaddr), int8_t)
                    317: 
                    318: /* copy_from_user() and copy_to_user() are usually used to copy data
                    319:  * buffers between the target and host.  These internally perform
                    320:  * locking/unlocking of the memory.
                    321:  */
                    322: abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
                    323: abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
                    324: 
                    325: /* Functions for accessing guest memory.  The tget and tput functions
                    326:    read/write single values, byteswapping as neccessary.  The lock_user
                    327:    gets a pointer to a contiguous area of guest memory, but does not perform
                    328:    and byteswapping.  lock_user may return either a pointer to the guest
                    329:    memory, or a temporary buffer.  */
                    330: 
                    331: /* Lock an area of guest memory into the host.  If copy is true then the
                    332:    host area will have the same contents as the guest.  */
                    333: static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
                    334: {
                    335:     if (!access_ok(type, guest_addr, len))
                    336:         return NULL;
                    337: #ifdef DEBUG_REMAP
                    338:     {
                    339:         void *addr;
                    340:         addr = malloc(len);
                    341:         if (copy)
                    342:             memcpy(addr, g2h(guest_addr), len);
                    343:         else
                    344:             memset(addr, 0, len);
                    345:         return addr;
                    346:     }
                    347: #else
                    348:     return g2h(guest_addr);
                    349: #endif
                    350: }
                    351: 
                    352: /* Unlock an area of guest memory.  The first LEN bytes must be
                    353:    flushed back to guest memory. host_ptr = NULL is explicitly
                    354:    allowed and does nothing. */
                    355: static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
                    356:                                long len)
                    357: {
                    358: 
                    359: #ifdef DEBUG_REMAP
                    360:     if (!host_ptr)
                    361:         return;
                    362:     if (host_ptr == g2h(guest_addr))
                    363:         return;
                    364:     if (len > 0)
                    365:         memcpy(g2h(guest_addr), host_ptr, len);
                    366:     free(host_ptr);
                    367: #endif
                    368: }
                    369: 
                    370: /* Return the length of a string in target memory or -TARGET_EFAULT if
                    371:    access error. */
                    372: abi_long target_strlen(abi_ulong gaddr);
                    373: 
                    374: /* Like lock_user but for null terminated strings.  */
                    375: static inline void *lock_user_string(abi_ulong guest_addr)
                    376: {
                    377:     abi_long len;
                    378:     len = target_strlen(guest_addr);
                    379:     if (len < 0)
                    380:         return NULL;
                    381:     return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
                    382: }
                    383: 
                    384: /* Helper macros for locking/ulocking a target struct.  */
                    385: #define lock_user_struct(type, host_ptr, guest_addr, copy)      \
                    386:     (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
                    387: #define unlock_user_struct(host_ptr, guest_addr, copy)          \
                    388:     unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
                    389: 
1.1.1.3   root      390: #if defined(CONFIG_USE_NPTL)
1.1       root      391: #include <pthread.h>
                    392: #endif
                    393: 
                    394: #endif /* QEMU_H */

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