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/*-
* 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 ``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 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/namei.h>
#include <sys/fcntl.h>
#include <sys/sysent.h>
#include <sys/imgact_elf.h>
#include <sys/syscall.h>
#include <sys/signalvar.h>
#include <sys/vnode.h>
#include <sys/linker.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <machine/elf.h>
#include <machine/md_var.h>
struct sysentvec elf32_freebsd_sysvec = {
SYS_MAXSYSCALL,
sysent,
0,
0,
NULL,
0,
NULL,
NULL,
__elfN(freebsd_fixup),
sendsig,
sigcode,
&szsigcode,
NULL,
"FreeBSD ELF32",
__elfN(coredump),
NULL,
MINSIGSTKSZ,
PAGE_SIZE,
VM_MIN_ADDRESS,
VM_MAXUSER_ADDRESS,
USRSTACK,
PS_STRINGS,
VM_PROT_ALL,
exec_copyout_strings,
exec_setregs
};
static Elf32_Brandinfo freebsd_brand_info = {
ELFOSABI_FREEBSD,
EM_PPC,
"FreeBSD",
"",
"/libexec/ld-elf.so.1",
&elf32_freebsd_sysvec
};
SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_ANY,
(sysinit_cfunc_t) elf32_insert_brand_entry,
&freebsd_brand_info);
/* Process one elf relocation with addend. */
static int
elf_reloc_internal(linker_file_t lf, const void *data, int type, int local)
{
Elf_Addr relocbase = (Elf_Addr) lf->address;
Elf_Addr *where;
Elf_Addr addr;
Elf_Addr addend;
Elf_Word rtype, symidx;
const Elf_Rel *rel;
const Elf_Rela *rela;
switch (type) {
case ELF_RELOC_REL:
rel = (const Elf_Rel *)data;
where = (Elf_Addr *) (relocbase + rel->r_offset);
addend = *where;
rtype = ELF_R_TYPE(rel->r_info);
symidx = ELF_R_SYM(rel->r_info);
break;
case ELF_RELOC_RELA:
rela = (const Elf_Rela *)data;
where = (Elf_Addr *) (relocbase + rela->r_offset);
addend = rela->r_addend;
rtype = ELF_R_TYPE(rela->r_info);
symidx = ELF_R_SYM(rela->r_info);
break;
default:
panic("elf_reloc: unknown relocation mode %d\n", type);
}
switch (rtype) {
case R_PPC_NONE:
break;
case R_PPC_GLOB_DAT:
addr = elf_lookup(lf, symidx, 1);
if (addr == 0)
return -1;
addr += addend;
if (*where != addr)
*where = addr;
break;
case R_PPC_JMP_SLOT:
/* No point in lazy binding for kernel modules. */
addr = elf_lookup(lf, symidx, 1);
if (addr == 0)
return -1;
if (*where != addr)
*where = addr;
break;
case R_PPC_RELATIVE:
addr = relocbase + addend + *where;
if (*where != addr)
*where = addr;
break;
case R_PPC_COPY:
/*
* There shouldn't be copy relocations in kernel
* objects.
*/
printf("kldload: unexpected R_COPY relocation\n");
return -1;
default:
printf("kldload: unexpected relocation type %d\n",
(int) rtype);
return -1;
}
return(0);
}
int
elf_reloc(linker_file_t lf, const void *data, int type)
{
return (elf_reloc_internal(lf, data, type, 0));
}
int
elf_reloc_local(linker_file_t lf, const void *data, int type)
{
return (elf_reloc_internal(lf, data, type, 1));
}
int
elf_cpu_load_file(linker_file_t lf __unused)
{
return (0);
}
int
elf_cpu_unload_file(linker_file_t lf __unused)
{
return (0);
}
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