8bcdb144eb
- Include <machine/tls.h> in MD rtld_machdep.h headers. - Remove local definitions of TLS_* constants from rtld_machdep.h headers and libc using the values from <machine/tls.h> instead. - Use _tcb_set() instead of inlined versions in MD allocate_initial_tls() routines in rtld. The one exception is amd64 whose _tcb_set() invokes the amd64_set_fsbase ifunc. rtld cannot use ifuncs, so amd64 inlines the logic to optionally write to fsbase directly. - Use _tcb_set() instead of _set_tp() in libc. - Use '&_tcb_get()->tcb_dtv' instead of _get_tp() in both rtld and libc. This permits removing _get_tp.c from rtld. - Use TLS_TCB_SIZE and TLS_TCB_ALIGN with allocate_tls() in MD allocate_initial_tls() routines in rtld. Reviewed by: kib, jrtc27 (earlier version) Differential Revision: https://reviews.freebsd.org/D33353
82 lines
2.9 KiB
C
82 lines
2.9 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/tls.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) \
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((const Elf_Dyn *)((obj)->relocbase + (Elf_Addr)&_DYNAMIC))
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Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
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const struct Struct_Obj_Entry *obj, const struct Struct_Obj_Entry *refobj,
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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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extern uint32_t cpu_feature;
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extern uint32_t cpu_feature2;
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extern uint32_t cpu_stdext_feature;
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extern uint32_t cpu_stdext_feature2;
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#define call_ifunc_resolver(ptr) \
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(((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t))(ptr))( \
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cpu_feature, cpu_feature2, cpu_stdext_feature, cpu_stdext_feature2))
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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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void *___tls_get_addr(tls_index *ti) __attribute__((__regparm__(1))) __exported;
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void *__tls_get_addr(tls_index *ti) __exported;
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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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#define md_abi_variant_hook(x)
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size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset);
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size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size,
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size_t align, size_t offset);
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#endif
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