17fb2856c3
The above commit fixed handling overaligned TLS segments in libc's TLS Variant I implementation, but rtld provides its own implementation for dynamically-linked executables which lacks these fixes. Thus, port these changes to rtld. This was previously commited as r337978 and reverted in r338149 due to exposing a bug the ARM rtld. This bug was fixed in r338317 by mmel. Submitted by: James Clarke Approved by: re (kib) Reviewed by: kbowling Testing by: kbowling (powerpc64), br (riscv), kevans (armv7) Obtained from: CheriBSD Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D16510
90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999, 2000 John D. Polstra.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef RTLD_MACHDEP_H
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#define RTLD_MACHDEP_H 1
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#include <sys/types.h>
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#include <machine/atomic.h>
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#include <machine/acle-compat.h>
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struct Struct_Obj_Entry;
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/* Return the address of the .dynamic section in the dynamic linker. */
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#define rtld_dynamic(obj) (&_DYNAMIC)
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Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
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const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
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const Elf_Rel *rel);
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#define make_function_pointer(def, defobj) \
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((defobj)->relocbase + (def)->st_value)
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#define call_initfini_pointer(obj, target) \
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(((InitFunc)(target))())
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#define call_init_pointer(obj, target) \
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(((InitArrFunc)(target))(main_argc, main_argv, environ))
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#define call_ifunc_resolver(ptr) \
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(((Elf_Addr (*)(void))ptr)())
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#define TLS_TCB_SIZE 8
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typedef struct {
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unsigned long ti_module;
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unsigned long ti_offset;
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} tls_index;
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#define round(size, align) \
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(((size) + (align) - 1) & ~((align) - 1))
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#define calculate_first_tls_offset(size, align) \
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round(8, align)
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#define calculate_tls_offset(prev_offset, prev_size, size, align) \
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round(prev_offset + prev_size, align)
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#define calculate_tls_end(off, size) ((off) + (size))
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#define calculate_tls_post_size(align) \
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round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE
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extern void *__tls_get_addr(tls_index *ti);
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#define RTLD_DEFAULT_STACK_PF_EXEC PF_X
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#define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
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extern void arm_abi_variant_hook(Elf_Auxinfo **);
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#ifdef __ARM_FP
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#define md_abi_variant_hook(x) arm_abi_variant_hook(x)
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#define RTLD_VARIANT_ENV_NAMES
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#else
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#define md_abi_variant_hook(x)
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#endif
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#endif
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