mirror of
https://git.FreeBSD.org/src.git
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Implement elf_reloc. This makes klds work.
Obtained from: netbsd
This commit is contained in:
Jake Burkholder
parent
e754f9c7ef
commit
06c4f91f00
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=85586
@ -105,6 +105,62 @@ __ElfType(Hashelt);
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/*
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* Relocation types.
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*/
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#define R_SPARC_NONE 0
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#define R_SPARC_8 1
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#define R_SPARC_16 2
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#define R_SPARC_32 3
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#define R_SPARC_DISP8 4
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#define R_SPARC_DISP16 5
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#define R_SPARC_DISP32 6
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#define R_SPARC_WDISP30 7
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#define R_SPARC_WDISP22 8
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#define R_SPARC_HI22 9
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#define R_SPARC_22 10
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#define R_SPARC_13 11
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#define R_SPARC_LO10 12
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#define R_SPARC_GOT10 13
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#define R_SPARC_GOT13 14
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#define R_SPARC_GOT22 15
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#define R_SPARC_PC10 16
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#define R_SPARC_PC22 17
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#define R_SPARC_WPLT30 18
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#define R_SPARC_COPY 19
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#define R_SPARC_GLOB_DAT 20
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#define R_SPARC_JMP_SLOT 21
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#define R_SPARC_RELATIVE 22
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#define R_SPARC_UA32 23
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#define R_SPARC_PLT32 24
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#define R_SPARC_HIPLT22 25
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#define R_SPARC_LOPLT10 26
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#define R_SPARC_PCPLT32 27
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#define R_SPARC_PCPLT22 28
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#define R_SPARC_PCPLT10 29
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#define R_SPARC_10 30
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#define R_SPARC_11 31
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#define R_SPARC_64 32
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#define R_SPARC_OLO10 33
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#define R_SPARC_HH22 34
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#define R_SPARC_HM10 35
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#define R_SPARC_LM22 36
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#define R_SPARC_PC_HH22 37
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#define R_SPARC_PC_HM10 38
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#define R_SPARC_PC_LM22 39
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#define R_SPARC_WDISP16 40
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#define R_SPARC_WDISP19 41
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#define R_SPARC_GLOB_JMP 42
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#define R_SPARC_7 43
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#define R_SPARC_5 44
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#define R_SPARC_6 45
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#define R_SPARC_DISP64 46
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#define R_SPARC_PLT64 47
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#define R_SPARC_HIX22 48
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#define R_SPARC_LOX10 49
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#define R_SPARC_H44 50
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#define R_SPARC_M44 51
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#define R_SPARC_L44 52
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#define R_SPARC_REGISTER 53
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#define R_SPARC_UA64 54
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#define R_SPARC_UA16 55
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/* Define "machine" characteristics */
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#define ELF_TARG_CLASS ELFCLASS64
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@ -1,7 +1,12 @@
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/*-
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* Copyright (c) 2001 Jake Burkholder.
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* Copyright (c) 2000 Eduardo Horvath.
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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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@ -10,19 +15,27 @@
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* from: NetBSD: mdreloc.c,v 1.5 2001/04/25 12:24:51 kleink Exp
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* $FreeBSD$
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*/
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@ -31,9 +44,186 @@
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#include <sys/linker.h>
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#include <machine/elf.h>
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#include "linker_if.h"
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/*
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* The following table holds for each relocation type:
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* - the width in bits of the memory location the relocation
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* applies to (not currently used)
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* - the number of bits the relocation value must be shifted to the
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* right (i.e. discard least significant bits) to fit into
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* the appropriate field in the instruction word.
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* - flags indicating whether
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* * the relocation involves a symbol
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* * the relocation is relative to the current position
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* * the relocation is for a GOT entry
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* * the relocation is relative to the load address
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*
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*/
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#define _RF_S 0x80000000 /* Resolve symbol */
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#define _RF_A 0x40000000 /* Use addend */
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#define _RF_P 0x20000000 /* Location relative */
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#define _RF_G 0x10000000 /* GOT offset */
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#define _RF_B 0x08000000 /* Load address relative */
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#define _RF_U 0x04000000 /* Unaligned */
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#define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
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#define _RF_RS(s) ( (s) & 0xff) /* right shift */
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static int reloc_target_flags[] = {
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0, /* NONE */
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_RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* RELOC_8 */
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_RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* RELOC_16 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* RELOC_32 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
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_RF_A| _RF_B|_RF_SZ(32) | _RF_RS(10), /* HI22 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 22 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 13 */
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_RF_A| _RF_B|_RF_SZ(32) | _RF_RS(0), /* LO10 */
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_RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
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_RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
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_RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
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_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
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_RF_SZ(32) | _RF_RS(0), /* COPY */
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_RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
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_RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
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_RF_A| _RF_B|_RF_SZ(64) | _RF_RS(0), /* RELATIVE */
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_RF_S|_RF_A| _RF_U|_RF_SZ(32) | _RF_RS(0), /* UA_32 */
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_RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
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_RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
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_RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
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_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
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_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
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_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 10 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 11 */
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_RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* 64 */
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_RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(42), /* HH22 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(32), /* HM10 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LM22 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 7 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 5 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 6 */
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_RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
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_RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(22), /* H44 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(12), /* M44 */
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_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* L44 */
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_RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
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_RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
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_RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
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};
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#define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
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#define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
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#define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
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#define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
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#define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
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#define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
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#define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
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static long reloc_target_bitmask[] = {
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#define _BM(x) (~(-(1ULL << (x))))
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0, /* NONE */
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_BM(8), _BM(16), _BM(32), /* RELOC_8, _16, _32 */
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_BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
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_BM(30), _BM(22), /* WDISP30, WDISP22 */
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_BM(22), _BM(22), /* HI22, _22 */
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_BM(13), _BM(10), /* RELOC_13, _LO10 */
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_BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
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_BM(10), _BM(22), /* _PC10, _PC22 */
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_BM(30), 0, /* _WPLT30, _COPY */
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_BM(32), _BM(32), _BM(32), /* _GLOB_DAT, JMP_SLOT, _RELATIVE */
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_BM(32), _BM(32), /* _UA32, PLT32 */
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_BM(22), _BM(10), /* _HIPLT22, LOPLT10 */
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_BM(32), _BM(22), _BM(10), /* _PCPLT32, _PCPLT22, _PCPLT10 */
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_BM(10), _BM(11), -1, /* _10, _11, _64 */
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_BM(10), _BM(22), /* _OLO10, _HH22 */
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_BM(10), _BM(22), /* _HM10, _LM22 */
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_BM(22), _BM(10), _BM(22), /* _PC_HH22, _PC_HM10, _PC_LM22 */
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_BM(16), _BM(19), /* _WDISP16, _WDISP19 */
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-1, /* GLOB_JMP */
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_BM(7), _BM(5), _BM(6) /* _7, _5, _6 */
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-1, -1, /* DISP64, PLT64 */
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_BM(22), _BM(13), /* HIX22, LOX10 */
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_BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
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-1, -1, _BM(16), /* REGISTER, UA64, UA16 */
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#undef _BM
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};
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#define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
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/* Process one elf relocation with addend. */
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int
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elf_reloc(linker_file_t lf, const void *data, int type, const char *sym)
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elf_reloc(linker_file_t lf, const void *data, int type, const char *symname)
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{
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TODO;
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const Elf_Rela *rela;
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Elf_Addr relocbase;
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Elf_Half *where32;
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Elf_Addr *where;
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Elf_Word rtype;
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Elf_Addr value;
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Elf_Addr mask;
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caddr_t addr;
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if (type != ELF_RELOC_RELA)
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return (-1);
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relocbase = (Elf_Addr)lf->address;
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rela = (const Elf_Rela *)data;
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where = (Elf_Addr *)(relocbase + rela->r_offset);
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where32 = (Elf_Half *)where;
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rtype = ELF_R_TYPE(rela->r_info);
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if (rtype == R_SPARC_NONE)
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return (0);
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if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
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rtype > R_SPARC_UA16)
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return (-1);
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if (RELOC_UNALIGNED(rtype))
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return (-1);
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value = rela->r_addend;
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if (RELOC_RESOLVE_SYMBOL(rtype)) {
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addr = linker_file_lookup_symbol(lf, symname, 1);
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if (addr == 0)
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return (-1);
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value += (Elf_Addr)addr;
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}
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if (RELOC_PC_RELATIVE(rtype))
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value -= (Elf_Addr)where;
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if (RELOC_BASE_RELATIVE(rtype))
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value += (Elf_Addr)(relocbase);
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mask = RELOC_VALUE_BITMASK(rtype);
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value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
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value &= mask;
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if (RELOC_TARGET_SIZE(rtype) > 32) {
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*where &= ~mask;
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*where |= value;
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} else {
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*where32 &= ~mask;
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*where32 |= value;
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}
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return (0);
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}
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