677a88cec2
handling. For statically linked apps this uses the __exidx_start/end
symbols set up by the linker. For dynamically linked apps it finds the
shared object that contains the given address and returns the location and
size of the exidx section in that shared object.
The dl_unwind_find_exidx() name is used by other BSD projects and Android,
and is mentioned in clang 3.5 comments as "the BSD interface" for finding
exidx data. GCC (in libgcc_s) expects the exact same API and functionality
to be provided by a function named __gnu_Unwind_Find_exidx(), so we provide
that with an alias ("strong reference").
Reviewed by: kib@
MFC after: 1 week
115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
/*-
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* Copyright (c) 2001 David E. O'Brien
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* Copyright (c) 1996-1997 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 _MACHINE_ELF_H_
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#define _MACHINE_ELF_H_ 1
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/*
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* EABI ELF definitions for the StrongARM architecture.
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* See "ARM ELF", document no. `SWS ESPC 0003 A-08' for details.
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*/
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#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
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#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */
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#include <sys/elf_generic.h>
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typedef struct { /* Auxiliary vector entry on initial stack */
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int a_type; /* Entry type. */
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union {
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long a_val; /* Integer value. */
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void *a_ptr; /* Address. */
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void (*a_fcn)(void); /* Function pointer (not used). */
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} a_un;
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} Elf32_Auxinfo;
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__ElfType(Auxinfo);
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#define ELF_ARCH EM_ARM
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#define ELF_MACHINE_OK(x) ((x) == EM_ARM)
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/* Unwind info section type */
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#define PT_ARM_EXIDX (PT_LOPROC + 1)
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/*
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* Relocation types.
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*/
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/* Values for a_type. */
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#define AT_NULL 0 /* Terminates the vector. */
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#define AT_IGNORE 1 /* Ignored entry. */
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#define AT_EXECFD 2 /* File descriptor of program to load. */
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#define AT_PHDR 3 /* Program header of program already loaded. */
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#define AT_PHENT 4 /* Size of each program header entry. */
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#define AT_PHNUM 5 /* Number of program header entries. */
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#define AT_PAGESZ 6 /* Page size in bytes. */
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#define AT_BASE 7 /* Interpreter's base address. */
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#define AT_FLAGS 8 /* Flags (unused). */
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#define AT_ENTRY 9 /* Where interpreter should transfer control. */
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#define AT_NOTELF 10 /* Program is not ELF ?? */
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#define AT_UID 11 /* Real uid. */
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#define AT_EUID 12 /* Effective uid. */
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#define AT_GID 13 /* Real gid. */
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#define AT_EGID 14 /* Effective gid. */
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#define AT_EXECPATH 15 /* Path to the executable. */
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#define AT_CANARY 16 /* Canary for SSP */
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#define AT_CANARYLEN 17 /* Length of the canary. */
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#define AT_OSRELDATE 18 /* OSRELDATE. */
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#define AT_NCPUS 19 /* Number of CPUs. */
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#define AT_PAGESIZES 20 /* Pagesizes. */
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#define AT_PAGESIZESLEN 21 /* Number of pagesizes. */
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#define AT_TIMEKEEP 22 /* Pointer to timehands. */
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#define AT_STACKPROT 23 /* Initial stack protection. */
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#define AT_COUNT 24 /* Count of defined aux entry types. */
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#define R_ARM_COUNT 33 /* Count of defined relocation types. */
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/* Define "machine" characteristics */
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#define ELF_TARG_CLASS ELFCLASS32
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#ifdef __ARMEB__
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#define ELF_TARG_DATA ELFDATA2MSB
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#else
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#define ELF_TARG_DATA ELFDATA2LSB
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#endif
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#define ELF_TARG_MACH EM_ARM
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#define ELF_TARG_VER 1
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/*
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* Magic number for the elf trampoline, chosen wisely to be an immediate
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* value.
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*/
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#define MAGIC_TRAMP_NUMBER 0x5c000003
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#define ET_DYN_LOAD_ADDR 0x12000
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#endif /* !_MACHINE_ELF_H_ */
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