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author | Ka Ho Ng <khng@FreeBSD.org> | 2024-10-08 19:40:20 +0000 |
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committer | Ka Ho Ng <khng@FreeBSD.org> | 2024-10-08 19:40:20 +0000 |
commit | 50c64df2a1739dca84c0e3bc795b70e5991b7010 (patch) | |
tree | 746783f1ad520233f8722d87516543723a3383d5 /usr.sbin/kldxref/ef_aarch64.c | |
parent | 7007de7d1095e2bc45111756b3e5d3bc6f446a9d (diff) | |
download | src-50c64df2a1739dca84c0e3bc795b70e5991b7010.tar.gz src-50c64df2a1739dca84c0e3bc795b70e5991b7010.zip |
Revert "libkldelf: add a private library for kernel/kld-related ELF parsing"
This reverts commit 0a2cfd653e86ac41c4e6e32a449d133c0ee6d677.
Diffstat (limited to 'usr.sbin/kldxref/ef_aarch64.c')
-rw-r--r-- | usr.sbin/kldxref/ef_aarch64.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/usr.sbin/kldxref/ef_aarch64.c b/usr.sbin/kldxref/ef_aarch64.c new file mode 100644 index 000000000000..b61de3b032ab --- /dev/null +++ b/usr.sbin/kldxref/ef_aarch64.c @@ -0,0 +1,81 @@ +/*- + * Copyright (c) 2005 Peter Grehan. + * Copyright 1996-1998 John D. Polstra. + * All rights reserved. + * + * 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 obtained from the file. `relbase' is the + * target relocation address of the section, and `dataoff/len' is the region + * that is to be relocated, and has been copied to *dest + */ +static int +ef_aarch64_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_Rela *rela; + + switch (reltype) { + 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); + + switch (rtype) { + case R_AARCH64_RELATIVE: + addr = relbase + addend; + le64enc(where, addr); + break; + case R_AARCH64_ABS64: + addr = EF_SYMADDR(ef, symidx) + addend; + le64enc(where, addr); + break; + default: + warnx("unhandled relocation type %d", (int)rtype); + break; + } + return (0); +} + +ELF_RELOC(ELFCLASS64, ELFDATA2LSB, EM_AARCH64, ef_aarch64_reloc); |