e5c3405ce8
This is continuation of D21163/r359634, which handled the alignment for global mode. Non-x86 arches are not handled, maintainers are welcomed. Tested by: emaste Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D24366
111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/*-
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* Copyright (c) 1999, 2000 John D. Polstra.
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* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Portions of this software were developed by the University of Cambridge
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* Computer Laboratory as part of the CTSRD Project, with support from the
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* UK Higher Education Innovation Fund (HEIF).
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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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struct Struct_Obj_Entry;
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uint64_t set_gp(struct Struct_Obj_Entry *obj);
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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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({ \
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Elf_Addr _dynamic_addr; \
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__asm __volatile("lla %0, _DYNAMIC" : "=r"(_dynamic_addr)); \
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(const Elf_Dyn *)_dynamic_addr; \
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})
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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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({ \
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uint64_t old0; \
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old0 = set_gp(obj); \
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(((InitFunc)(target))()); \
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__asm __volatile("mv gp, %0" :: "r"(old0)); \
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})
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#define call_init_pointer(obj, target) \
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({ \
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uint64_t old1; \
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old1 = set_gp(obj); \
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(((InitArrFunc)(target))(main_argc, main_argv, environ)); \
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__asm __volatile("mv gp, %0" :: "r"(old1)); \
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})
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#define call_ifunc_resolver(ptr) \
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(((Elf_Addr (*)(void))ptr)())
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/*
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* TLS
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*/
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#define TLS_TP_OFFSET 0x0
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#define TLS_DTV_OFFSET 0x800
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#define TLS_TCB_SIZE 16
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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, offset) \
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TLS_TCB_SIZE
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#define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
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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) 0
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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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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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#define md_abi_variant_hook(x)
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#endif
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