7251b4bf93
metadata. This fixes module dependency resolution by the kernel linker on sparc64, where the relocations for the metadata are different than on other architectures; the relative offset is in the addend of an Elf_Rela record instead of the original value of the location being patched. Also fix printf formats in debug code. Submitted by: Hartmut Brandt <brandt@fokus.gmd.de> PR: 46732 Tested on: alpha (obrien), i386, sparc64
209 lines
4.6 KiB
C
209 lines
4.6 KiB
C
/*-
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* Copyright 1996-1998 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/exec.h>
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#include <sys/imgact.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/namei.h>
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#include <sys/fcntl.h>
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#include <sys/sysent.h>
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#include <sys/imgact_elf.h>
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#include <sys/syscall.h>
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#include <sys/signalvar.h>
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#include <sys/vnode.h>
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#include <sys/linker.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <machine/elf.h>
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#include <machine/md_var.h>
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struct sysentvec elf64_freebsd_sysvec = {
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SYS_MAXSYSCALL,
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sysent,
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0,
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0,
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NULL,
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0,
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NULL,
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NULL,
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__elfN(freebsd_fixup),
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sendsig,
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sigcode,
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&szsigcode,
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0,
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"FreeBSD ELF64",
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__elfN(coredump),
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NULL,
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MINSIGSTKSZ,
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PAGE_SIZE,
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VM_MIN_ADDRESS,
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VM_MAXUSER_ADDRESS,
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USRSTACK,
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PS_STRINGS,
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VM_PROT_ALL,
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exec_copyout_strings,
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exec_setregs
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};
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static Elf64_Brandinfo freebsd_brand_info = {
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ELFOSABI_FREEBSD,
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EM_ALPHA,
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"FreeBSD",
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"",
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"/usr/libexec/ld-elf.so.1",
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&elf64_freebsd_sysvec
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};
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SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY,
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(sysinit_cfunc_t) elf64_insert_brand_entry,
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&freebsd_brand_info);
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/* Process one elf relocation with addend. */
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static int
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elf_reloc_internal(linker_file_t lf, const void *data, int type, int local)
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{
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Elf_Addr relocbase = (Elf_Addr) lf->address;
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Elf_Addr *where;
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Elf_Addr addr;
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Elf_Addr addend;
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Elf_Word rtype, symidx;
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const Elf_Rel *rel;
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const Elf_Rela *rela;
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switch (type) {
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case ELF_RELOC_REL:
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rel = (const Elf_Rel *)data;
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where = (Elf_Addr *) (relocbase + rel->r_offset);
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addend = *where;
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rtype = ELF_R_TYPE(rel->r_info);
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symidx = ELF_R_SYM(rel->r_info);
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break;
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case ELF_RELOC_RELA:
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rela = (const Elf_Rela *)data;
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where = (Elf_Addr *) (relocbase + rela->r_offset);
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addend = rela->r_addend;
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rtype = ELF_R_TYPE(rela->r_info);
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symidx = ELF_R_SYM(rela->r_info);
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break;
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default:
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panic("elf_reloc: unknown relocation mode %d\n", type);
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}
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if (local) {
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if (rtype == R_ALPHA_RELATIVE) {
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addr = relocbase + addend;
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if (*where != addr)
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*where = addr;
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}
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return (0);
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}
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switch (rtype) {
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case R_ALPHA_NONE:
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break;
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case R_ALPHA_REFQUAD:
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addr = elf_lookup(lf, symidx, 1);
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if (addr == 0)
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return -1;
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addr += addend;
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if (*where != addr)
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*where = addr;
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break;
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case R_ALPHA_GLOB_DAT:
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addr = elf_lookup(lf, symidx, 1);
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if (addr == 0)
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return -1;
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addr += addend;
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if (*where != addr)
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*where = addr;
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break;
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case R_ALPHA_JMP_SLOT:
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/* No point in lazy binding for kernel modules. */
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addr = elf_lookup(lf, symidx, 1);
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if (addr == 0)
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return -1;
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if (*where != addr)
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*where = addr;
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break;
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case R_ALPHA_RELATIVE:
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break;
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case R_ALPHA_COPY:
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/*
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* There shouldn't be copy relocations in kernel
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* objects.
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*/
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printf("kldload: unexpected R_COPY relocation\n");
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return -1;
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default:
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printf("kldload: unexpected relocation type %d\n",
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(int) rtype);
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return -1;
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}
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return(0);
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}
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int
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elf_reloc(linker_file_t lf, const void *data, int type)
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{
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return (elf_reloc_internal(lf, data, type, 0));
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}
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int
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elf_reloc_local(linker_file_t lf, const void *data, int type)
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{
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return (elf_reloc_internal(lf, data, type, 1));
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}
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int
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elf_cpu_load_file(linker_file_t lf __unused)
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{
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return (0);
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}
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int
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elf_cpu_unload_file(linker_file_t lf __unused)
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{
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return (0);
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}
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