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/*-
* Copyright (c) 1999, 2000 John D. Polstra.
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef RTLD_MACHDEP_H
#define RTLD_MACHDEP_H 1
#include <sys/types.h>
#include <machine/atomic.h>
struct Struct_Obj_Entry;
uint64_t set_gp(struct Struct_Obj_Entry *obj);
/* Return the address of the .dynamic section in the dynamic linker. */
#define rtld_dynamic(obj) \
({ \
Elf_Addr _dynamic_addr; \
__asm __volatile("lla %0, _DYNAMIC" : "=r"(_dynamic_addr)); \
(const Elf_Dyn *)_dynamic_addr; \
})
#define RTLD_IS_DYNAMIC() (1)
Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
const struct Struct_Obj_Entry *defobj,
const struct Struct_Obj_Entry *obj,
const Elf_Rel *rel);
#define make_function_pointer(def, defobj) \
((defobj)->relocbase + (def)->st_value)
#define call_initfini_pointer(obj, target) \
({ \
uint64_t old0; \
old0 = set_gp(obj); \
(((InitFunc)(target))()); \
__asm __volatile("mv gp, %0" :: "r"(old0)); \
})
#define call_init_pointer(obj, target) \
({ \
uint64_t old1; \
old1 = set_gp(obj); \
(((InitArrFunc)(target))(main_argc, main_argv, environ)); \
__asm __volatile("mv gp, %0" :: "r"(old1)); \
})
/*
* Lazy binding entry point, called via PLT.
*/
void _rtld_bind_start(void);
/*
* TLS
*/
#define TLS_TP_OFFSET 0x0
#define TLS_DTV_OFFSET 0x800
#define TLS_TCB_SIZE 16
#define round(size, align) \
(((size) + (align) - 1) & ~((align) - 1))
#define calculate_first_tls_offset(size, align) \
round(16, align)
#define calculate_tls_offset(prev_offset, prev_size, size, align) \
round(prev_offset + prev_size, align)
#define calculate_tls_end(off, size) ((off) + (size))
typedef struct {
unsigned long ti_module;
unsigned long ti_offset;
} tls_index;
extern void *__tls_get_addr(tls_index* ti);
#define RTLD_DEFAULT_STACK_PF_EXEC PF_X
#define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
#endif
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