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35f1e82763
* configure.in: Add --enable-stackguard-randomization option.
(ENABLE_STACKGUARD_RANDOMIZE): New define.
* config.h.in (ENABLE_STACKGUARD_RANDOMIZE): Add.
* sysdeps/unix/sysv/linux/dl-osinfo.h: Include stdint.h.
(_dl_setup_stack_chk_guard): New inline function.
* sysdeps/generic/dl-osinfo.h: Include stdint.h.
(_dl_setup_stack_chk_guard): New inline function.
* elf/rtld.c (__stack_chk_guard): New variable.
(dl_main): Remove all traces of TLS_INIT_TP_EXPENSIVE.
Set __stack_chk_guard to _dl_setup_stack_chk_guard (),
use THREAD_SET_STACK_GUARD if defined.
* elf/Versions (ld): Export __stack_chk_guard@@GLIBC_2.4.
* sysdeps/generic/libc-start.c (__stack_chk_guard): New variable.
(__libc_start_main): Set __stack_chk_guard to
_dl_setup_stack_chk_guard (), use THREAD_SET_STACK_GUARD if defined.
* sysdeps/generic/libc-tls.c (__libc_setup_tls): Remove all
traces of TLS_INIT_TP_EXPENSIVE.
* debug/Versions (libc): Export __stack_chk_fail@@GLIBC_2.4.
* debug/Makefile (routines): Add stack_chk_fail.
(static-only-routines): Add stack_chk_fail_local.
* debug/stack_chk_fail_local.c: New file.
* debug/stack_chk_fail.c: New file.
* elf/Makefile: Add rules to build and run tst-stackguard1{,-static}
tests.
* elf/tst-stackguard1.c: New file.
* elf/tst-stackguard1-static.c: New file.
* elf/stackguard-macros.h: New file.
141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/* Definitions for thread-local data handling. NPTL/sparc version.
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Copyright (C) 2003, 2005 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _TLS_H
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#define _TLS_H
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#include <dl-sysdep.h>
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#ifndef __ASSEMBLER__
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# include <stdbool.h>
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# include <stddef.h>
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# include <stdint.h>
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# include <stdlib.h>
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# include <list.h>
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/* Type for the dtv. */
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typedef union dtv
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{
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size_t counter;
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struct
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{
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void *val;
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bool is_static;
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} pointer;
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} dtv_t;
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typedef struct
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{
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void *tcb; /* Pointer to the TCB. Not necessary the
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thread descriptor used by libpthread. */
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dtv_t *dtv;
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void *self;
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int multiple_threads;
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uintptr_t sysinfo;
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uintptr_t stack_guard;
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} tcbhead_t;
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#else /* __ASSEMBLER__ */
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# include <tcb-offsets.h>
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#endif /* __ASSEMBLER__ */
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/* We require TLS support in the tools. */
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#ifndef HAVE_TLS_SUPPORT
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# error "TLS support is required."
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#endif
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/* Signal that TLS support is available. */
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#define USE_TLS 1
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#ifndef __ASSEMBLER__
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/* Get system call information. */
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# include <sysdep.h>
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/* Get the thread descriptor definition. */
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# include <nptl/descr.h>
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register struct pthread *__thread_self __asm__("%g7");
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/* This is the size of the initial TCB. Can't be just sizeof (tcbhead_t),
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because NPTL getpid, __libc_alloca_cutoff etc. need (almost) the whole
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struct pthread even when not linked with -lpthread. */
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# define TLS_INIT_TCB_SIZE sizeof (struct pthread)
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/* Alignment requirements for the initial TCB. */
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# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
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/* This is the size of the TCB. */
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# define TLS_TCB_SIZE sizeof (struct pthread)
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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN __alignof__ (struct pthread)
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/* The TCB can have any size and the memory following the address the
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thread pointer points to is unspecified. Allocate the TCB there. */
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# define TLS_TCB_AT_TP 1
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/* Install the dtv pointer. The pointer passed is to the element with
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index -1 which contain the length. */
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# define INSTALL_DTV(descr, dtvp) \
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((tcbhead_t *) (descr))->dtv = (dtvp) + 1
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/* Install new dtv for current thread. */
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# define INSTALL_NEW_DTV(DTV) \
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(((tcbhead_t *) __thread_self)->dtv = (DTV))
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(descr) \
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(((tcbhead_t *) (descr))->dtv)
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/* Code to initially initialize the thread pointer. */
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# define TLS_INIT_TP(descr, secondcall) \
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(__thread_self = (__typeof (__thread_self)) (descr), NULL)
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/* Return the address of the dtv for the current thread. */
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# define THREAD_DTV() \
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(((tcbhead_t *) __thread_self)->dtv)
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/* Return the thread descriptor for the current thread. */
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#define THREAD_SELF __thread_self
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/* Magic for libthread_db to know how to do THREAD_SELF. */
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# define DB_THREAD_SELF_INCLUDE <sys/ucontext.h>
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# define DB_THREAD_SELF \
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REGISTER (32, 32, REG_G7 * 4, 0) REGISTER (64, 64, REG_G7 * 8, 0)
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/* Access to data in the thread descriptor is easy. */
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#define THREAD_GETMEM(descr, member) \
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descr->member
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#define THREAD_GETMEM_NC(descr, member, idx) \
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descr->member[idx]
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#define THREAD_SETMEM(descr, member, value) \
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descr->member = (value)
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#define THREAD_SETMEM_NC(descr, member, idx, value) \
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descr->member[idx] = (value)
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/* Set the stack guard field in TCB head. */
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#define THREAD_SET_STACK_GUARD(value) \
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THREAD_SETMEM (THREAD_SELF, header.stack_guard, value)
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# define THREAD_COPY_STACK_GUARD(descr) \
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((descr)->header.stack_guard \
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= THREAD_GETMEM (THREAD_SELF, header.stack_guard))
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#endif /* !ASSEMBLER */
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#endif /* tls.h */
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