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Annotation of qemu/bsd-user/qemu.h, revision 1.1

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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