f36ba45234
sysentvec. Initialized all fields of all sysentvecs, which will allow them to be used instead of constants in more places. Provided stack fixup routines for emulations that previously used the default.
172 lines
4.0 KiB
C
172 lines
4.0 KiB
C
/*-
|
|
* 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/linker.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/imgact_elf.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.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_386,
|
|
"FreeBSD",
|
|
"",
|
|
"/usr/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. */
|
|
int
|
|
elf_reloc(linker_file_t lf, const void *data, int type)
|
|
{
|
|
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("unknown reloc type %d\n", type);
|
|
}
|
|
|
|
switch (rtype) {
|
|
|
|
case R_386_NONE: /* none */
|
|
break;
|
|
|
|
case R_386_32: /* S + A */
|
|
addr = elf_lookup(lf, symidx, 1);
|
|
if (addr == 0)
|
|
return -1;
|
|
addr += addend;
|
|
if (*where != addr)
|
|
*where = addr;
|
|
break;
|
|
|
|
case R_386_PC32: /* S + A - P */
|
|
addr = elf_lookup(lf, symidx, 1);
|
|
if (addr == 0)
|
|
return -1;
|
|
addr += addend - (Elf_Addr)where;
|
|
if (*where != addr)
|
|
*where = addr;
|
|
break;
|
|
|
|
case R_386_COPY: /* none */
|
|
/*
|
|
* There shouldn't be copy relocations in kernel
|
|
* objects.
|
|
*/
|
|
printf("kldload: unexpected R_COPY relocation\n");
|
|
return -1;
|
|
break;
|
|
|
|
case R_386_GLOB_DAT: /* S */
|
|
addr = elf_lookup(lf, symidx, 1);
|
|
if (addr == 0)
|
|
return -1;
|
|
if (*where != addr)
|
|
*where = addr;
|
|
break;
|
|
|
|
case R_386_RELATIVE: /* B + A */
|
|
addr = relocbase + addend;
|
|
if (*where != addr)
|
|
*where = addr;
|
|
break;
|
|
|
|
default:
|
|
printf("kldload: unexpected relocation type %d\n",
|
|
rtype);
|
|
return -1;
|
|
}
|
|
return(0);
|
|
}
|