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8cb69e0543
IO_VTABLES_LEN is the size of the struct array in bytes, not the number
of __IO_jump_t's in the array. Drops just under 384kb from .rodata on
LP64 machines.
Fixes: 3020f72618 ("libio: Remove the usage of __libc_IO_vtables")
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Tested-by: Florian Weimer <fweimer@redhat.com>
564 lines
20 KiB
C
564 lines
20 KiB
C
/* libio vtable validation.
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Copyright (C) 2016-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <libioP.h>
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#include <stdio.h>
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#include <ldsodefs.h>
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#include <array_length.h>
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#include <pointer_guard.h>
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#include <libio-macros.h>
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/* Both _IO_str_* and _IO_new_file functions are pulled into every link (from
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stdio initialization). */
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#ifndef SHARED
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/* NB: the following directives do add pragma weak for _IO_default _* and
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_IO_wdefault_* symbols to potentially avoid link failures, since they
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are always used when the __io_vtables is used. */
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# pragma weak _IO_wstr_finish
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# pragma weak _IO_wstr_overflow
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# pragma weak _IO_wstr_pbackfail
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# pragma weak _IO_wstr_seekoff
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# pragma weak _IO_wstr_underflow
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# pragma weak _IO_file_close
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# pragma weak _IO_file_close_mmap
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# pragma weak _IO_file_doallocate
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# pragma weak _IO_file_finish
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# pragma weak _IO_file_overflow
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# pragma weak _IO_file_read
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# pragma weak _IO_file_seek
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# pragma weak _IO_file_seekoff_maybe_mmap
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# pragma weak _IO_file_seekoff_mmap
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# pragma weak _IO_file_setbuf
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# pragma weak _IO_file_setbuf_mmap
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# pragma weak _IO_file_setbuf_mmap
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# pragma weak _IO_file_stat
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# pragma weak _IO_file_sync
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# pragma weak _IO_file_sync_mmap
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# pragma weak _IO_file_underflow
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# pragma weak _IO_file_underflow_maybe_mmap
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# pragma weak _IO_file_underflow_mmap
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# pragma weak _IO_file_xsgetn
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# pragma weak _IO_file_xsgetn_maybe_mmap
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# pragma weak _IO_file_xsgetn_mmap
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# pragma weak _IO_file_xsputn
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# pragma weak _IO_wfile_overflow
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# pragma weak _IO_wfile_sync
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# pragma weak _IO_wfile_underflow
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# pragma weak _IO_wfile_underflow_maybe_mmap
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# pragma weak _IO_wfile_underflow_mmap
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# pragma weak _IO_wfile_doallocate
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# pragma weak _IO_wfile_seekoff
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# pragma weak _IO_wfile_xsputn
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# pragma weak _IO_new_proc_close
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# pragma weak _IO_cookie_close
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# pragma weak _IO_cookie_read
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# pragma weak _IO_cookie_seek
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# pragma weak _IO_cookie_seekoff
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# pragma weak _IO_cookie_write
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# pragma weak _IO_mem_finish
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# pragma weak _IO_mem_sync
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# pragma weak _IO_wmem_finish
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# pragma weak _IO_wmem_sync
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# pragma weak __printf_buffer_as_file_overflow
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# pragma weak __printf_buffer_as_file_xsputn
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# pragma weak __wprintf_buffer_as_file_overflow
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# pragma weak __wprintf_buffer_as_file_xsputn
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#endif
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const struct _IO_jump_t __io_vtables[] attribute_relro =
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{
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/* _IO_str_jumps */
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[IO_STR_JUMPS] =
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{
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_str_finish),
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JUMP_INIT (overflow, _IO_str_overflow),
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JUMP_INIT (underflow, _IO_str_underflow),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_str_pbackfail),
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JUMP_INIT (xsputn, _IO_default_xsputn),
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JUMP_INIT (xsgetn, _IO_default_xsgetn),
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JUMP_INIT (seekoff, _IO_str_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_default_setbuf),
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JUMP_INIT (sync, _IO_default_sync),
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JUMP_INIT (doallocate, _IO_default_doallocate),
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JUMP_INIT (read, _IO_default_read),
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JUMP_INIT (write, _IO_default_write),
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JUMP_INIT (seek, _IO_default_seek),
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JUMP_INIT (close, _IO_default_close),
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JUMP_INIT (stat, _IO_default_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_wstr_jumps */
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[IO_WSTR_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_wstr_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wstr_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wstr_underflow),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail),
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JUMP_INIT (xsputn, _IO_wdefault_xsputn),
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JUMP_INIT (xsgetn, _IO_wdefault_xsgetn),
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JUMP_INIT (seekoff, _IO_wstr_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_default_setbuf),
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JUMP_INIT (sync, _IO_default_sync),
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JUMP_INIT (doallocate, _IO_wdefault_doallocate),
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JUMP_INIT (read, _IO_default_read),
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JUMP_INIT (write, _IO_default_write),
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JUMP_INIT (seek, _IO_default_seek),
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JUMP_INIT (close, _IO_default_close),
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JUMP_INIT (stat, _IO_default_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_file_jumps */
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[IO_FILE_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_file_finish),
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JUMP_INIT (overflow, _IO_file_overflow),
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JUMP_INIT (underflow, _IO_file_underflow),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_default_pbackfail),
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JUMP_INIT (xsputn, _IO_file_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn),
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JUMP_INIT (seekoff, _IO_new_file_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_new_file_setbuf),
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JUMP_INIT (sync, _IO_new_file_sync),
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JUMP_INIT (doallocate, _IO_file_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_file_jumps_mmap */
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[IO_FILE_JUMPS_MMAP] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_file_finish),
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JUMP_INIT (overflow, _IO_file_overflow),
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JUMP_INIT (underflow, _IO_file_underflow_mmap),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_default_pbackfail),
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JUMP_INIT (xsputn, _IO_new_file_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn_mmap),
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JUMP_INIT (seekoff, _IO_file_seekoff_mmap),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap),
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JUMP_INIT (sync, _IO_file_sync_mmap),
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JUMP_INIT (doallocate, _IO_file_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close_mmap),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_file_jumps_maybe_mmap */
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[IO_FILE_JUMPS_MAYBE_MMAP] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_file_finish),
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JUMP_INIT (overflow, _IO_file_overflow),
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JUMP_INIT (underflow, _IO_file_underflow_maybe_mmap),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_default_pbackfail),
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JUMP_INIT (xsputn, _IO_new_file_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn_maybe_mmap),
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JUMP_INIT (seekoff, _IO_file_seekoff_maybe_mmap),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap),
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JUMP_INIT (sync, _IO_new_file_sync),
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JUMP_INIT (doallocate, _IO_file_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_wfile_jumps */
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[IO_WFILE_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_new_file_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wfile_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wfile_underflow),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
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JUMP_INIT (xsputn, _IO_wfile_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn),
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JUMP_INIT (seekoff, _IO_wfile_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_new_file_setbuf),
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JUMP_INIT (sync, (_IO_sync_t) _IO_wfile_sync),
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JUMP_INIT (doallocate, _IO_wfile_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_wfile_jumps_mmap */
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[IO_WFILE_JUMPS_MMAP] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_new_file_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wfile_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wfile_underflow_mmap),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
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JUMP_INIT (xsputn, _IO_wfile_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn),
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JUMP_INIT (seekoff, _IO_wfile_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_file_setbuf_mmap),
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JUMP_INIT (sync, (_IO_sync_t) _IO_wfile_sync),
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JUMP_INIT (doallocate, _IO_wfile_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close_mmap),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_wfile_jumps_maybe_mmap */
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[IO_WFILE_JUMPS_MAYBE_MMAP] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_new_file_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wfile_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wfile_underflow_maybe_mmap),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
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JUMP_INIT (xsputn, _IO_wfile_xsputn),
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JUMP_INIT (xsgetn, _IO_file_xsgetn),
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JUMP_INIT (seekoff, _IO_wfile_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_file_setbuf_mmap),
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JUMP_INIT (sync, (_IO_sync_t) _IO_wfile_sync),
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JUMP_INIT (doallocate, _IO_wfile_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_file_close),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_cookie_jumps */
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[IO_COOKIE_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_file_finish),
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JUMP_INIT (overflow, _IO_file_overflow),
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JUMP_INIT (underflow, _IO_file_underflow),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_default_pbackfail),
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JUMP_INIT (xsputn, _IO_file_xsputn),
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JUMP_INIT (xsgetn, _IO_default_xsgetn),
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JUMP_INIT (seekoff, _IO_cookie_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_file_setbuf),
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JUMP_INIT (sync, _IO_file_sync),
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JUMP_INIT (doallocate, _IO_file_doallocate),
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JUMP_INIT (read, _IO_cookie_read),
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JUMP_INIT (write, _IO_cookie_write),
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JUMP_INIT (seek, _IO_cookie_seek),
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JUMP_INIT (close, _IO_cookie_close),
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JUMP_INIT (stat, _IO_default_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue),
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},
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/* _IO_proc_jumps */
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[IO_PROC_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_new_file_finish),
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JUMP_INIT (overflow, _IO_new_file_overflow),
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JUMP_INIT (underflow, _IO_new_file_underflow),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_default_pbackfail),
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JUMP_INIT (xsputn, _IO_new_file_xsputn),
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JUMP_INIT (xsgetn, _IO_default_xsgetn),
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JUMP_INIT (seekoff, _IO_new_file_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_new_file_setbuf),
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JUMP_INIT (sync, _IO_new_file_sync),
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JUMP_INIT (doallocate, _IO_file_doallocate),
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JUMP_INIT (read, _IO_file_read),
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JUMP_INIT (write, _IO_new_file_write),
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JUMP_INIT (seek, _IO_file_seek),
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JUMP_INIT (close, _IO_new_proc_close),
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JUMP_INIT (stat, _IO_file_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_mem_jumps */
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[IO_MEM_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_mem_finish),
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JUMP_INIT (overflow, _IO_str_overflow),
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JUMP_INIT (underflow, _IO_str_underflow),
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JUMP_INIT (uflow, _IO_default_uflow),
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JUMP_INIT (pbackfail, _IO_str_pbackfail),
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JUMP_INIT (xsputn, _IO_default_xsputn),
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JUMP_INIT (xsgetn, _IO_default_xsgetn),
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JUMP_INIT (seekoff, _IO_str_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_default_setbuf),
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JUMP_INIT (sync, _IO_mem_sync),
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JUMP_INIT (doallocate, _IO_default_doallocate),
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JUMP_INIT (read, _IO_default_read),
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JUMP_INIT (write, _IO_default_write),
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JUMP_INIT (seek, _IO_default_seek),
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JUMP_INIT (close, _IO_default_close),
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JUMP_INIT (stat, _IO_default_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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},
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/* _IO_wmem_jumps */
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[IO_WMEM_JUMPS] = {
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_wmem_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wstr_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wstr_underflow),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail),
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JUMP_INIT (xsputn, _IO_wdefault_xsputn),
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JUMP_INIT (xsgetn, _IO_wdefault_xsgetn),
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JUMP_INIT (seekoff, _IO_wstr_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_default_setbuf),
|
|
JUMP_INIT (sync, _IO_wmem_sync),
|
|
JUMP_INIT (doallocate, _IO_wdefault_doallocate),
|
|
JUMP_INIT (read, _IO_default_read),
|
|
JUMP_INIT (write, _IO_default_write),
|
|
JUMP_INIT (seek, _IO_default_seek),
|
|
JUMP_INIT (close, _IO_default_close),
|
|
JUMP_INIT (stat, _IO_default_stat),
|
|
JUMP_INIT (showmanyc, _IO_default_showmanyc),
|
|
JUMP_INIT (imbue, _IO_default_imbue)
|
|
},
|
|
[IO_PRINTF_BUFFER_AS_FILE_JUMPS] = {
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT (finish, NULL),
|
|
JUMP_INIT (overflow, __printf_buffer_as_file_overflow),
|
|
JUMP_INIT (underflow, NULL),
|
|
JUMP_INIT (uflow, NULL),
|
|
JUMP_INIT (pbackfail, NULL),
|
|
JUMP_INIT (xsputn, __printf_buffer_as_file_xsputn),
|
|
JUMP_INIT (xsgetn, NULL),
|
|
JUMP_INIT (seekoff, NULL),
|
|
JUMP_INIT (seekpos, NULL),
|
|
JUMP_INIT (setbuf, NULL),
|
|
JUMP_INIT (sync, NULL),
|
|
JUMP_INIT (doallocate, NULL),
|
|
JUMP_INIT (read, NULL),
|
|
JUMP_INIT (write, NULL),
|
|
JUMP_INIT (seek, NULL),
|
|
JUMP_INIT (close, NULL),
|
|
JUMP_INIT (stat, NULL),
|
|
JUMP_INIT (showmanyc, NULL),
|
|
JUMP_INIT (imbue, NULL)
|
|
},
|
|
[IO_WPRINTF_BUFFER_AS_FILE_JUMPS] = {
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT (finish, NULL),
|
|
JUMP_INIT (overflow, (_IO_overflow_t) __wprintf_buffer_as_file_overflow),
|
|
JUMP_INIT (underflow, NULL),
|
|
JUMP_INIT (uflow, NULL),
|
|
JUMP_INIT (pbackfail, NULL),
|
|
JUMP_INIT (xsputn, __wprintf_buffer_as_file_xsputn),
|
|
JUMP_INIT (xsgetn, NULL),
|
|
JUMP_INIT (seekoff, NULL),
|
|
JUMP_INIT (seekpos, NULL),
|
|
JUMP_INIT (setbuf, NULL),
|
|
JUMP_INIT (sync, NULL),
|
|
JUMP_INIT (doallocate, NULL),
|
|
JUMP_INIT (read, NULL),
|
|
JUMP_INIT (write, NULL),
|
|
JUMP_INIT (seek, NULL),
|
|
JUMP_INIT (close, NULL),
|
|
JUMP_INIT (stat, NULL),
|
|
JUMP_INIT (showmanyc, NULL),
|
|
JUMP_INIT (imbue, NULL)
|
|
},
|
|
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
|
|
/* _IO_old_file_jumps */
|
|
[IO_OLD_FILE_JUMPS] = {
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT (finish, _IO_old_file_finish),
|
|
JUMP_INIT (overflow, _IO_old_file_overflow),
|
|
JUMP_INIT (underflow, _IO_old_file_underflow),
|
|
JUMP_INIT (uflow, _IO_default_uflow),
|
|
JUMP_INIT (pbackfail, _IO_default_pbackfail),
|
|
JUMP_INIT (xsputn, _IO_old_file_xsputn),
|
|
JUMP_INIT (xsgetn, _IO_default_xsgetn),
|
|
JUMP_INIT (seekoff, _IO_old_file_seekoff),
|
|
JUMP_INIT (seekpos, _IO_default_seekpos),
|
|
JUMP_INIT (setbuf, _IO_old_file_setbuf),
|
|
JUMP_INIT (sync, _IO_old_file_sync),
|
|
JUMP_INIT (doallocate, _IO_file_doallocate),
|
|
JUMP_INIT (read, _IO_file_read),
|
|
JUMP_INIT (write, _IO_old_file_write),
|
|
JUMP_INIT (seek, _IO_file_seek),
|
|
JUMP_INIT (close, _IO_file_close),
|
|
JUMP_INIT (stat, _IO_file_stat)
|
|
},
|
|
/* _IO_old_proc_jumps */
|
|
[IO_OLD_PROC_JUMPS] = {
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT (finish, _IO_old_file_finish),
|
|
JUMP_INIT (overflow, _IO_old_file_overflow),
|
|
JUMP_INIT (underflow, _IO_old_file_underflow),
|
|
JUMP_INIT (uflow, _IO_default_uflow),
|
|
JUMP_INIT (pbackfail, _IO_default_pbackfail),
|
|
JUMP_INIT (xsputn, _IO_old_file_xsputn),
|
|
JUMP_INIT (xsgetn, _IO_default_xsgetn),
|
|
JUMP_INIT (seekoff, _IO_old_file_seekoff),
|
|
JUMP_INIT (seekpos, _IO_default_seekpos),
|
|
JUMP_INIT (setbuf, _IO_old_file_setbuf),
|
|
JUMP_INIT (sync, _IO_old_file_sync),
|
|
JUMP_INIT (doallocate, _IO_file_doallocate),
|
|
JUMP_INIT (read, _IO_file_read),
|
|
JUMP_INIT (write, _IO_old_file_write),
|
|
JUMP_INIT (seek, _IO_file_seek),
|
|
JUMP_INIT (close, _IO_old_proc_close),
|
|
JUMP_INIT (stat, _IO_file_stat),
|
|
JUMP_INIT (showmanyc, _IO_default_showmanyc),
|
|
JUMP_INIT (imbue, _IO_default_imbue)
|
|
},
|
|
#endif
|
|
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
|
|
/* _IO_old_cookie_jumps */
|
|
[IO_OLD_COOKIED_JUMPS] = {
|
|
JUMP_INIT_DUMMY,
|
|
JUMP_INIT (finish, _IO_file_finish),
|
|
JUMP_INIT (overflow, _IO_file_overflow),
|
|
JUMP_INIT (underflow, _IO_file_underflow),
|
|
JUMP_INIT (uflow, _IO_default_uflow),
|
|
JUMP_INIT (pbackfail, _IO_default_pbackfail),
|
|
JUMP_INIT (xsputn, _IO_file_xsputn),
|
|
JUMP_INIT (xsgetn, _IO_default_xsgetn),
|
|
JUMP_INIT (seekoff, _IO_cookie_seekoff),
|
|
JUMP_INIT (seekpos, _IO_default_seekpos),
|
|
JUMP_INIT (setbuf, _IO_file_setbuf),
|
|
JUMP_INIT (sync, _IO_file_sync),
|
|
JUMP_INIT (doallocate, _IO_file_doallocate),
|
|
JUMP_INIT (read, _IO_cookie_read),
|
|
JUMP_INIT (write, _IO_cookie_write),
|
|
JUMP_INIT (seek, _IO_old_cookie_seek),
|
|
JUMP_INIT (close, _IO_cookie_close),
|
|
JUMP_INIT (stat, _IO_default_stat),
|
|
JUMP_INIT (showmanyc, _IO_default_showmanyc),
|
|
JUMP_INIT (imbue, _IO_default_imbue),
|
|
},
|
|
#endif
|
|
};
|
|
_Static_assert (array_length (__io_vtables) == IO_VTABLES_NUM,
|
|
"initializer count");
|
|
|
|
#ifdef SHARED
|
|
|
|
void (*IO_accept_foreign_vtables) (void) attribute_hidden;
|
|
|
|
#else /* !SHARED */
|
|
|
|
/* Used to check whether static dlopen support is needed. */
|
|
# pragma weak __dlopen
|
|
|
|
#endif
|
|
|
|
void attribute_hidden
|
|
_IO_vtable_check (void)
|
|
{
|
|
#ifdef SHARED
|
|
/* Honor the compatibility flag. */
|
|
void (*flag) (void) = atomic_load_relaxed (&IO_accept_foreign_vtables);
|
|
PTR_DEMANGLE (flag);
|
|
if (flag == &_IO_vtable_check)
|
|
return;
|
|
|
|
/* In case this libc copy is in a non-default namespace, we always
|
|
need to accept foreign vtables because there is always a
|
|
possibility that FILE * objects are passed across the linking
|
|
boundary. */
|
|
{
|
|
Dl_info di;
|
|
struct link_map *l;
|
|
if (!rtld_active ()
|
|
|| (_dl_addr (_IO_vtable_check, &di, &l, NULL) != 0
|
|
&& l->l_ns != LM_ID_BASE))
|
|
return;
|
|
}
|
|
|
|
#else /* !SHARED */
|
|
/* We cannot perform vtable validation in the static dlopen case
|
|
because FILE * handles might be passed back and forth across the
|
|
boundary. Therefore, we disable checking in this case. */
|
|
if (__dlopen != NULL)
|
|
return;
|
|
#endif
|
|
|
|
__libc_fatal ("Fatal error: glibc detected an invalid stdio handle\n");
|
|
}
|
|
|
|
/* Some variants of libstdc++ interpose _IO_2_1_stdin_ etc. and
|
|
install their own vtables directly, without calling _IO_init or
|
|
other functions. Detect this by looking at the vtables values
|
|
during startup, and disable vtable validation in this case. */
|
|
#ifdef SHARED
|
|
__attribute__ ((constructor))
|
|
static void
|
|
check_stdfiles_vtables (void)
|
|
{
|
|
if (_IO_2_1_stdin_.vtable != &_IO_file_jumps
|
|
|| _IO_2_1_stdout_.vtable != &_IO_file_jumps
|
|
|| _IO_2_1_stderr_.vtable != &_IO_file_jumps)
|
|
IO_set_accept_foreign_vtables (&_IO_vtable_check);
|
|
}
|
|
#endif
|
|
|
|
#define STR(s) XSTR(s)
|
|
#define XSTR(s) #s
|
|
|
|
#undef _IO_file_jumps
|
|
#define _IO_file_jumps_alias "__io_vtables + " STR(IO_FILE_JUMPS_OFFSET)
|
|
declare_object_symbol_alias (_IO_file_jumps, _IO_file_jumps_alias,
|
|
IO_JUMP_T_SIZE)
|
|
#undef _IO_wfile_jumps
|
|
#define _IO_wfile_jumps_alias "__io_vtables + " STR(IO_WFILE_JUMPS_OFFSET)
|
|
declare_object_symbol_alias (_IO_wfile_jumps, _IO_wfile_jumps_alias,
|
|
IO_JUMP_T_SIZE)
|