mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
ad2f35cb39
Recognize the uint64_t type in addition to the current int32_t and size_t. This allows addition of tunables of uint64_t types. In addition to adding the uint64_t type, this patch also consolidates validation and reading of integer types in tunables. One notable change is that of overflow computation in tunables_strtoul. The function was lifted from __internal_strtoul, but it does not need the boundary condition check (i.e. result == ULONG_MAX) since it does not need to set errno. As a result the check can be simplified, which I have now done. * elf/dl-tunable-types.h (tunable_type_code_t): New type TUNABLE_TYPE_UINT_64. * elf/dl-tunables.c (tunables_strtoul): Return uint64_t. Simplify computation of overflow. (tunable_set_val_if_valid_range_signed, tunable_set_val_if_valid_range_unsigned): Remove and replace with this... (TUNABLE_SET_VAL_IF_VALID_RANGE): ... New macro. (tunable_initialize): Adjust. Add uint64_t support. (__tunable_set_val): Add uint64_t support. * README.tunables: Document it.
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Tunable type information.
|
|
|
|
Copyright (C) 2016-2017 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/>. */
|
|
|
|
#ifndef _TUNABLE_TYPES_H_
|
|
# define _TUNABLE_TYPES_H_
|
|
#include <stddef.h>
|
|
|
|
typedef enum
|
|
{
|
|
TUNABLE_TYPE_INT_32,
|
|
TUNABLE_TYPE_UINT_64,
|
|
TUNABLE_TYPE_SIZE_T,
|
|
TUNABLE_TYPE_STRING
|
|
} tunable_type_code_t;
|
|
|
|
typedef struct
|
|
{
|
|
tunable_type_code_t type_code;
|
|
int64_t min;
|
|
int64_t max;
|
|
} tunable_type_t;
|
|
|
|
typedef union
|
|
{
|
|
int64_t numval;
|
|
const char *strval;
|
|
} tunable_val_t;
|
|
|
|
typedef void (*tunable_callback_t) (tunable_val_t *);
|
|
|
|
/* Security level for tunables. This decides what to do with individual
|
|
tunables for AT_SECURE binaries. */
|
|
typedef enum
|
|
{
|
|
/* Erase the tunable for AT_SECURE binaries so that child processes don't
|
|
read it. */
|
|
TUNABLE_SECLEVEL_SXID_ERASE = 0,
|
|
/* Ignore the tunable for AT_SECURE binaries, but don't erase it, so that
|
|
child processes can read it. */
|
|
TUNABLE_SECLEVEL_SXID_IGNORE = 1,
|
|
/* Read the tunable. */
|
|
TUNABLE_SECLEVEL_NONE = 2,
|
|
} tunable_seclevel_t;
|
|
|
|
|
|
#endif
|