diff options
Diffstat (limited to 'sysdeps/nacl/nacl-interfaces.c')
| -rw-r--r-- | sysdeps/nacl/nacl-interfaces.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/sysdeps/nacl/nacl-interfaces.c b/sysdeps/nacl/nacl-interfaces.c deleted file mode 100644 index bf1cf19523..0000000000 --- a/sysdeps/nacl/nacl-interfaces.c +++ /dev/null @@ -1,165 +0,0 @@ -/* Using NaCl interface tables. - Copyright (C) 2015-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <nacl-interfaces.h> -#include <ldsodefs.h> - - -/* These magic symbols are provided implicitly by the linker to - give us the bounds of the specially-named sections. */ - -extern const struct nacl_interface __start_nacl_mandatory_interface_names[] - attribute_hidden; -extern const struct nacl_interface __stop_nacl_mandatory_interface_names[] - attribute_hidden; - -extern uintptr_t __start_nacl_mandatory_interface_tables[] - attribute_hidden; -extern uintptr_t __stop_nacl_mandatory_interface_tables[] - attribute_hidden; - -/* We use weak references for the optional ones, since they - might not be included at all in any given statically-linked program. */ - -extern const struct nacl_interface __start_nacl_optional_interface_names[] - attribute_hidden __attribute__ ((weak)); -extern const struct nacl_interface __stop_nacl_optional_interface_names[] - attribute_hidden __attribute__ ((weak)); - -extern uintptr_t __start_nacl_optional_interface_tables[] - attribute_hidden __attribute__ ((weak)); -extern uintptr_t __stop_nacl_optional_interface_tables[] - attribute_hidden __attribute__ ((weak)); - -static uintptr_t * -next_nacl_table (uintptr_t *t, const struct nacl_interface *i) -{ - return (void *) t + i->table_size; -} - -static void __attribute__ ((noreturn)) -missing_mandatory_interface (const struct nacl_interface *i) -{ - static const char before[] = - "FATAL: NaCl IRT interface query failed for essential interface \""; - static const char after[] = - "\"\n"; - - if (__nacl_irt_fdio.write != NULL) - { - size_t wrote; - (*__nacl_irt_fdio.write) (2, before, sizeof before - 1, &wrote); - (*__nacl_irt_fdio.write) (2, i->name, i->namelen - 1, &wrote); - (*__nacl_irt_fdio.write) (2, after, sizeof after - 1, &wrote); - } - - if (__nacl_irt_basic.exit != NULL) - (*__nacl_irt_basic.exit) (-1); - - __builtin_trap (); -} - -static void -initialize_mandatory_interfaces (void) -{ - const struct nacl_interface *i = __start_nacl_mandatory_interface_names; - uintptr_t *t = __start_nacl_mandatory_interface_tables; - while (i < __stop_nacl_mandatory_interface_names) - { - if (__nacl_irt_query (i->name, t, i->table_size) != i->table_size) - missing_mandatory_interface (i); - - t = next_nacl_table (t, i); - i = next_nacl_interface (i); - } -} - - -static int -nacl_missing_optional_interface (void) -{ - return ENOSYS; -} - -static void -initialize_optional_interfaces (void) -{ - const struct nacl_interface *i = __start_nacl_optional_interface_names; - uintptr_t *t = __start_nacl_optional_interface_tables; - while (i < __stop_nacl_optional_interface_names) - { - size_t filled = __nacl_irt_query (i->name, t, i->table_size); - if (filled != i->table_size) - for (size_t slot = 0; slot < i->table_size / sizeof *t; ++slot) - t[slot] = (uintptr_t) &nacl_missing_optional_interface; - - t = next_nacl_table (t, i); - i = next_nacl_interface (i); - } -} - - -void attribute_hidden -__nacl_initialize_interfaces (void) -{ - initialize_mandatory_interfaces (); - initialize_optional_interfaces (); -} - - -static bool -try_supply (const struct nacl_interface *const start, - const struct nacl_interface *const stop, - uintptr_t *all_tables, - const char *ident, size_t ident_len, - const void *table, size_t tablesize) -{ - const struct nacl_interface *i = start; - uintptr_t *t = all_tables; - while (i < stop) - { - if (i->table_size == tablesize - && i->namelen == ident_len - && !memcmp (i->name, ident, ident_len)) - { - memcpy (t, table, tablesize); - return true; - } - - t = next_nacl_table (t, i); - i = next_nacl_interface (i); - } - - return false; -} - -internal_function -bool -PASTE_NAME (__nacl_supply_interface_, MODULE_NAME) - (const char *ident, size_t ident_len, const void *table, size_t tablesize) -{ - return (try_supply (__start_nacl_mandatory_interface_names, - __stop_nacl_mandatory_interface_names, - __start_nacl_mandatory_interface_tables, - ident, ident_len, table, tablesize) - || try_supply (__start_nacl_optional_interface_names, - __stop_nacl_optional_interface_names, - __start_nacl_optional_interface_tables, - ident, ident_len, table, tablesize)); -} |