diff options
Diffstat (limited to 'libio/libioP.h')
| -rw-r--r-- | libio/libioP.h | 136 |
1 files changed, 109 insertions, 27 deletions
diff --git a/libio/libioP.h b/libio/libioP.h index 80941b763f..d777553cb0 100644 --- a/libio/libioP.h +++ b/libio/libioP.h @@ -469,19 +469,68 @@ extern int _IO_default_sync (FILE *) __THROW; extern int _IO_default_showmanyc (FILE *) __THROW; extern void _IO_default_imbue (FILE *, void *) __THROW; -extern const struct _IO_jump_t _IO_file_jumps; -libc_hidden_proto (_IO_file_jumps) -extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden; -extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden; -extern const struct _IO_jump_t _IO_wfile_jumps; -libc_hidden_proto (_IO_wfile_jumps) -extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden; -extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden; -extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden; -extern const struct _IO_jump_t _IO_streambuf_jumps; -extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden; -extern const struct _IO_jump_t _IO_str_jumps attribute_hidden; -extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden; +extern int __printf_buffer_as_file_overflow (FILE *fp, int ch); +extern size_t __printf_buffer_as_file_xsputn (FILE *fp, const void *buf, + size_t len); +extern wint_t __wprintf_buffer_as_file_overflow (FILE *fp, int ch); +extern size_t __wprintf_buffer_as_file_xsputn (FILE *fp, const void *buf, + size_t len); + +enum +{ + IO_STR_JUMPS = 0, + IO_WSTR_JUMPS = 1, + IO_FILE_JUMPS = 2, + IO_FILE_JUMPS_MMAP = 3, + IO_FILE_JUMPS_MAYBE_MMAP = 4, + IO_WFILE_JUMPS = 5, + IO_WFILE_JUMPS_MMAP = 6, + IO_WFILE_JUMPS_MAYBE_MMAP = 7, + IO_COOKIE_JUMPS = 8, + IO_PROC_JUMPS = 9, + IO_MEM_JUMPS = 10, + IO_WMEM_JUMPS = 11, + IO_PRINTF_BUFFER_AS_FILE_JUMPS = 12, + IO_WPRINTF_BUFFER_AS_FILE_JUMPS = 13, +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) + IO_OLD_FILE_JUMPS = 14, + IO_OLD_PROC_JUMPS = 15, + IO_OLD_COOKIED_JUMPS = 16, + IO_VTABLES_NUM = IO_OLD_COOKIED_JUMPS + 1, +#elif SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) + IO_OLD_COOKIED_JUMPS = 14, + IO_VTABLES_NUM = IO_OLD_COOKIED_JUMPS + 1, +#else + IO_VTABLES_NUM = IO_WPRINTF_BUFFER_AS_FILE_JUMPS + 1 +#endif +}; +#define IO_VTABLES_LEN (IO_VTABLES_NUM * sizeof (struct _IO_jump_t)) + +extern const struct _IO_jump_t __io_vtables[] attribute_hidden; +#define _IO_str_jumps (__io_vtables[IO_STR_JUMPS]) +#define _IO_wstr_jumps (__io_vtables[IO_WSTR_JUMPS]) +#define _IO_file_jumps (__io_vtables[IO_FILE_JUMPS]) +#define _IO_file_jumps_mmap (__io_vtables[IO_FILE_JUMPS_MMAP]) +#define _IO_file_jumps_maybe_mmap (__io_vtables[IO_FILE_JUMPS_MAYBE_MMAP]) +#define _IO_wfile_jumps (__io_vtables[IO_WFILE_JUMPS]) +#define _IO_wfile_jumps_mmap (__io_vtables[IO_WFILE_JUMPS_MMAP]) +#define _IO_wfile_jumps_maybe_mmap (__io_vtables[IO_WFILE_JUMPS_MAYBE_MMAP]) +#define _IO_cookie_jumps (__io_vtables[IO_COOKIE_JUMPS]) +#define _IO_proc_jumps (__io_vtables[IO_PROC_JUMPS]) +#define _IO_mem_jumps (__io_vtables[IO_MEM_JUMPS]) +#define _IO_wmem_jumps (__io_vtables[IO_WMEM_JUMPS]) +#define _IO_printf_buffer_as_file_jumps (__io_vtables[IO_PRINTF_BUFFER_AS_FILE_JUMPS]) +#define _IO_wprintf_buffer_as_file_jumps (__io_vtables[IO_WPRINTF_BUFFER_AS_FILE_JUMPS]) +#define _IO_old_file_jumps (__io_vtables[IO_OLD_FILE_JUMPS]) +#define _IO_old_proc_jumps (__io_vtables[IO_OLD_PROC_JUMPS]) +#define _IO_old_cookie_jumps (__io_vtables[IO_OLD_COOKIED_JUMPS]) + +#ifdef SHARED +# define libio_static_fn_required(name) +#else +# define libio_static_fn_required(name) __asm (".globl " #name); +#endif + extern int _IO_do_write (FILE *, const char *, size_t); libc_hidden_proto (_IO_do_write) extern int _IO_new_do_write (FILE *, const char *, size_t); @@ -593,6 +642,14 @@ extern void _IO_new_file_init_internal (struct _IO_FILE_plus *) extern FILE* _IO_new_file_setbuf (FILE *, char *, ssize_t); extern FILE* _IO_file_setbuf_mmap (FILE *, char *, ssize_t); extern int _IO_new_file_sync (FILE *); +extern int _IO_file_sync_mmap (FILE *) attribute_hidden; +extern size_t _IO_file_xsgetn_maybe_mmap (FILE *fp, void *data, size_t n) + attribute_hidden; +extern size_t _IO_file_xsgetn_mmap (FILE *fp, void *data, size_t n) + attribute_hidden; +extern off64_t _IO_file_seekoff_maybe_mmap (FILE *fp, off64_t offset, int dir, + int mode) + attribute_hidden; extern int _IO_new_file_underflow (FILE *); extern int _IO_new_file_overflow (FILE *, int); extern off64_t _IO_new_file_seekoff (FILE *, off64_t, int, int); @@ -625,6 +682,10 @@ extern wint_t _IO_wfile_overflow (FILE *, wint_t); libc_hidden_proto (_IO_wfile_overflow) extern off64_t _IO_wfile_seekoff (FILE *, off64_t, int, int); libc_hidden_proto (_IO_wfile_seekoff) +extern wint_t _IO_wfile_underflow_maybe_mmap (FILE *fp) + attribute_hidden; +extern wint_t _IO_wfile_underflow_mmap (FILE *fp) + attribute_hidden; /* Jumptable functions for proc_files. */ extern FILE* _IO_proc_open (FILE *, const char *, const char *) @@ -643,13 +704,41 @@ extern int _IO_str_overflow (FILE *, int) __THROW; libc_hidden_proto (_IO_str_overflow) extern int _IO_str_pbackfail (FILE *, int) __THROW; libc_hidden_proto (_IO_str_pbackfail) -extern off64_t _IO_str_seekoff (FILE *, off64_t, int, int) __THROW; +extern off64_t _IO_str_seekoff (FILE *, off64_t, int, int) __THROW + ; libc_hidden_proto (_IO_str_seekoff) extern void _IO_str_finish (FILE *, int) __THROW; +extern int _IO_str_chk_overflow (FILE *fp, int c) __THROW + attribute_hidden; + +/* Jumptable functions for fopencookie. */ +extern ssize_t _IO_cookie_read (FILE *fp, void *buf, ssize_t size) + attribute_hidden; +extern ssize_t _IO_cookie_write (FILE *fp, const void *buf, ssize_t size) + attribute_hidden; +extern off64_t _IO_cookie_seek (FILE *fp, off64_t offset, int dir) + attribute_hidden; +extern int _IO_cookie_close (FILE *fp) attribute_hidden; +extern off64_t _IO_cookie_seekoff (FILE *fp, off64_t offset, int dir, int mode) + attribute_hidden; +extern off64_t _IO_old_cookie_seek (FILE *fp, off64_t offset, int dir) + attribute_hidden; + +/* Jumptable functions for obstack. */ +extern int __IO_obstack_overflow (FILE *fp, int c) attribute_hidden; +extern size_t __IO_obstack_xsputn (FILE *fp, const void *data, size_t n) + attribute_hidden; + +/* Jumptable functions for open_{w}memstream. */ +extern int _IO_mem_sync (FILE* fp) __THROW attribute_hidden; +extern void _IO_mem_finish (FILE* fp, int) __THROW attribute_hidden; +extern int _IO_wmem_sync (FILE* fp) __THROW attribute_hidden; +extern void _IO_wmem_finish (FILE* fp, int) __THROW attribute_hidden; /* Other strfile functions */ struct _IO_strfile_; extern ssize_t _IO_str_count (FILE *) __THROW; +extern int _IO_strn_overflow (FILE *fp, int c) __THROW attribute_hidden; /* And the wide character versions. */ extern void _IO_wstr_init_static (FILE *, wchar_t *, size_t, wchar_t *) @@ -662,6 +751,10 @@ extern off64_t _IO_wstr_seekoff (FILE *, off64_t, int, int) extern wint_t _IO_wstr_pbackfail (FILE *, wint_t) __THROW; extern void _IO_wstr_finish (FILE *, int) __THROW; +/* Helper functions. */ +int _IO_helper_overflow (FILE *s, int c); +int _IO_whelper_overflow (FILE *s, int c); + /* Internal versions of v*printf that take an additional flags parameter. */ extern int __vfprintf_internal (FILE *fp, const char *format, va_list ap, @@ -895,14 +988,6 @@ _IO_acquire_lock_fct (FILE **p) } while (0) #endif -/* Collect all vtables in a special section for vtable verification. - These symbols cover the extent of this section. */ -symbol_set_declare (__libc_IO_vtables) - -/* libio vtables need to carry this attribute so that they pass - validation. */ -#define libio_vtable __attribute__ ((section ("__libc_IO_vtables"))) - #ifdef SHARED /* If equal to &_IO_vtable_check (with pointer guard protection), unknown vtable pointers are valid. This function pointer is solely @@ -937,12 +1022,9 @@ void _IO_vtable_check (void) attribute_hidden; static inline const struct _IO_jump_t * IO_validate_vtable (const struct _IO_jump_t *vtable) { - /* Fast path: The vtable pointer is within the __libc_IO_vtables - section. */ - uintptr_t section_length = __stop___libc_IO_vtables - __start___libc_IO_vtables; uintptr_t ptr = (uintptr_t) vtable; - uintptr_t offset = ptr - (uintptr_t) __start___libc_IO_vtables; - if (__glibc_unlikely (offset >= section_length)) + uintptr_t offset = ptr - (uintptr_t) &__io_vtables; + if (__glibc_unlikely (offset >= IO_VTABLES_LEN)) /* The vtable pointer is not in the expected section. Use the slow path, which will terminate the process if necessary. */ _IO_vtable_check (); |