1 #ifndef _STDIO_IMPL_H 2 #define _STDIO_IMPL_H 3 4 #include <assert.h> 5 #include <stdio.h> 6 7 #define UNGET 8 8 9 #if defined(TRUSTY_USERSPACE) 10 #define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0) 11 #define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0) 12 #define FUNLOCK(f) do { if (__need_unlock) __unlockfile((f)); } while (0) 13 #else 14 /* Trusty only supports the std streams which all have `lock = -1`, so these 15 * macros are unnecessary. Defining them as no-ops lets us avoid compiling 16 * __lockfile.c which makes use of __pthread_self which is not defined in the 17 * kernel. */ 18 #define FFINALLOCK(f) do { DEBUG_ASSERT((f)->lock == -1); } while (0) 19 #define FLOCK(f) do { DEBUG_ASSERT((f)->lock == -1); } while (0) 20 #define FUNLOCK(f) do { DEBUG_ASSERT((f)->lock == -1); } while (0) 21 #endif 22 23 #define F_PERM 1 24 #define F_NORD 4 25 #define F_NOWR 8 26 #define F_EOF 16 27 #define F_ERR 32 28 #define F_SVB 64 29 #define F_APP 128 30 31 struct _IO_FILE { 32 unsigned flags; 33 unsigned char *rpos, *rend; 34 int (*close)(FILE *); 35 unsigned char *wend, *wpos; 36 unsigned char *mustbezero_1; 37 unsigned char *wbase; 38 size_t (*read)(FILE *, unsigned char *, size_t); 39 size_t (*write)(FILE *, const unsigned char *, size_t); 40 off_t (*seek)(FILE *, off_t, int); 41 unsigned char *buf; 42 size_t buf_size; 43 FILE *prev, *next; 44 int fd; 45 int pipe_pid; 46 long lockcount; 47 int mode; 48 volatile int lock; 49 int lbf; 50 void *cookie; 51 off_t off; 52 char *getln_buf; 53 void *mustbezero_2; 54 unsigned char *shend; 55 off_t shlim, shcnt; 56 FILE *prev_locked, *next_locked; 57 struct __locale_struct *locale; 58 }; 59 60 extern hidden FILE *volatile __stdin_used; 61 extern hidden FILE *volatile __stdout_used; 62 extern hidden FILE *volatile __stderr_used; 63 64 hidden int __lockfile(FILE *); 65 hidden void __unlockfile(FILE *); 66 67 hidden size_t __stdio_read(FILE *, unsigned char *, size_t); 68 hidden size_t __stdio_write(FILE *, const unsigned char *, size_t); 69 hidden size_t __stdout_write(FILE *, const unsigned char *, size_t); 70 hidden off_t __stdio_seek(FILE *, off_t, int); 71 hidden int __stdio_close(FILE *); 72 73 hidden size_t __string_read(FILE *, unsigned char *, size_t); 74 75 hidden int __toread(FILE *); 76 hidden int __towrite(FILE *); 77 78 hidden void __stdio_exit(void); 79 hidden void __stdio_exit_needed(void); 80 81 #if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303) 82 __attribute__((visibility("protected"))) 83 #endif 84 int __overflow(FILE *, int), __uflow(FILE *); 85 86 hidden int __fseeko(FILE *, off_t, int); 87 hidden int __fseeko_unlocked(FILE *, off_t, int); 88 hidden off_t __ftello(FILE *); 89 hidden off_t __ftello_unlocked(FILE *); 90 hidden size_t __fwritex(const unsigned char *, size_t, FILE *); 91 hidden int __putc_unlocked(int, FILE *); 92 93 hidden FILE *__fdopen(int, const char *); 94 hidden int __fmodeflags(const char *); 95 96 hidden FILE *__ofl_add(FILE *f); 97 hidden FILE **__ofl_lock(void); 98 hidden void __ofl_unlock(void); 99 100 struct __pthread; 101 hidden void __register_locked_file(FILE *, struct __pthread *); 102 hidden void __unlist_locked_file(FILE *); 103 hidden void __do_orphaned_stdio_locks(void); 104 105 #define MAYBE_WAITERS 0x40000000 106 107 hidden void __getopt_msg(const char *, const char *, const char *, size_t); 108 109 #define feof(f) ((f)->flags & F_EOF) 110 #define ferror(f) ((f)->flags & F_ERR) 111 112 #define getc_unlocked(f) \ 113 ( ((f)->rpos != (f)->rend) ? *(f)->rpos++ : __uflow((f)) ) 114 115 #define putc_unlocked(c, f) \ 116 ( (((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend)) \ 117 ? *(f)->wpos++ = (unsigned char)(c) \ 118 : __overflow((f),(unsigned char)(c)) ) 119 120 /* Caller-allocated FILE * operations */ 121 hidden FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t); 122 hidden int __fclose_ca(FILE *); 123 124 #endif 125