The branch main has been updated by jrtc27: URL: https://cgit.FreeBSD.org/src/commit/?id=c88f7d8fb54051366d91acfc6c80aca6154da3b4
commit c88f7d8fb54051366d91acfc6c80aca6154da3b4 Author: Jessica Clarke <[email protected]> AuthorDate: 2023-12-14 18:27:09 +0000 Commit: Jessica Clarke <[email protected]> CommitDate: 2023-12-14 18:27:09 +0000 kldxref: Add arm support --- usr.sbin/kldxref/Makefile | 1 + usr.sbin/kldxref/ef_arm.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 95 insertions(+) diff --git a/usr.sbin/kldxref/Makefile b/usr.sbin/kldxref/Makefile index 07451ba8f42b..7b392e020939 100644 --- a/usr.sbin/kldxref/Makefile +++ b/usr.sbin/kldxref/Makefile @@ -4,6 +4,7 @@ PROG= kldxref MAN= kldxref.8 SRCS= kldxref.c ef.c ef_obj.c elf.c SRCS+= ef_aarch64.c \ + ef_arm.c \ ef_amd64.c \ ef_i386.c \ ef_mips.c \ diff --git a/usr.sbin/kldxref/ef_arm.c b/usr.sbin/kldxref/ef_arm.c new file mode 100644 index 000000000000..4b926839ee5d --- /dev/null +++ b/usr.sbin/kldxref/ef_arm.c @@ -0,0 +1,94 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2003 Jake Burkholder. + * Copyright 1996-1998 John D. Polstra. + * All rights reserved. + * Copyright (c) 2023 Jessica Clarke <[email protected]> + * + * 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. + */ + +#include <sys/endian.h> + +#include <err.h> +#include <errno.h> +#include <gelf.h> + +#include "ef.h" + +/* + * Apply relocations to the values we got from the file. `relbase' is the + * target relocation address of the section, and `dataoff' is the target + * relocation address of the data in `dest'. + */ +static int +ef_arm_reloc(struct elf_file *ef, const void *reldata, Elf_Type reltype, + GElf_Addr relbase, GElf_Addr dataoff, size_t len, void *dest) +{ + char *where; + GElf_Addr addr, addend; + GElf_Size rtype, symidx; + const GElf_Rel *rel; + const GElf_Rela *rela; + + switch (reltype) { + case ELF_T_REL: + rel = (const GElf_Rel *)reldata; + where = (char *)dest + relbase + rel->r_offset - dataoff; + addend = 0; + rtype = GELF_R_TYPE(rel->r_info); + symidx = GELF_R_SYM(rel->r_info); + break; + case ELF_T_RELA: + rela = (const GElf_Rela *)reldata; + where = (char *)dest + relbase + rela->r_offset - dataoff; + addend = rela->r_addend; + rtype = GELF_R_TYPE(rela->r_info); + symidx = GELF_R_SYM(rela->r_info); + break; + default: + return (EINVAL); + } + + if (where < (char *)dest || where >= (char *)dest + len) + return (0); + + if (reltype == ELF_T_REL) + addend = le32dec(where); + + switch (rtype) { + case R_ARM_ABS32: /* S + A */ + addr = EF_SYMADDR(ef, symidx) + addend; + le32enc(where, addr); + break; + case R_ARM_RELATIVE: /* B + A */ + addr = addend + relbase; + le32enc(where, addr); + break; + default: + warnx("unhandled relocation type %d", (int)rtype); + } + return (0); +} + +ELF_RELOC(ELFCLASS32, ELFDATA2LSB, EM_ARM, ef_arm_reloc);
