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/*-
* Copyright (c) 2001 Jake Burkholder.
* Copyright (c) 2000 Eduardo Horvath.
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*
* from: NetBSD: mdreloc.c,v 1.42 2008/04/28 20:23:04 martin Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/sparc64/elf_machdep.c 219533 2011-03-11 21:08:02Z marius $");
#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/proc.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/vm_param.h>
#include <machine/elf.h>
#include "linker_if.h"
static struct sysentvec elf64_freebsd_sysvec = {
.sv_size = SYS_MAXSYSCALL,
.sv_table = sysent,
.sv_mask = 0,
.sv_sigsize = 0,
.sv_sigtbl = NULL,
.sv_errsize = 0,
.sv_errtbl = NULL,
.sv_transtrap = NULL,
.sv_fixup = __elfN(freebsd_fixup),
.sv_sendsig = sendsig,
.sv_sigcode = NULL,
.sv_szsigcode = NULL,
.sv_prepsyscall = NULL,
.sv_name = "FreeBSD ELF64",
.sv_coredump = __elfN(coredump),
.sv_imgact_try = NULL,
.sv_minsigstksz = MINSIGSTKSZ,
.sv_pagesize = PAGE_SIZE,
.sv_minuser = VM_MIN_ADDRESS,
.sv_maxuser = VM_MAXUSER_ADDRESS,
.sv_usrstack = USRSTACK,
.sv_psstrings = PS_STRINGS,
.sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
.sv_copyout_strings = exec_copyout_strings,
.sv_setregs = exec_setregs,
.sv_fixlimit = NULL,
.sv_maxssiz = NULL,
.sv_flags = SV_ABI_FREEBSD | SV_LP64,
.sv_set_syscall_retval = cpu_set_syscall_retval,
.sv_fetch_syscall_args = cpu_fetch_syscall_args,
.sv_syscallnames = syscallnames,
.sv_schedtail = NULL,
};
static Elf64_Brandinfo freebsd_brand_info = {
.brand = ELFOSABI_FREEBSD,
.machine = EM_SPARCV9,
.compat_3_brand = "FreeBSD",
.emul_path = NULL,
.interp_path = "/libexec/ld-elf.so.1",
.sysvec = &elf64_freebsd_sysvec,
.interp_newpath = NULL,
.brand_note = &elf64_freebsd_brandnote,
.flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
};
SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
(sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_info);
static Elf64_Brandinfo freebsd_brand_oinfo = {
.brand = ELFOSABI_FREEBSD,
.machine = EM_SPARCV9,
.compat_3_brand = "FreeBSD",
.emul_path = NULL,
.interp_path = "/usr/libexec/ld-elf.so.1",
.sysvec = &elf64_freebsd_sysvec,
.interp_newpath = NULL,
.brand_note = &elf64_freebsd_brandnote,
.flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
};
SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
(sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_oinfo);
void
elf64_dump_thread(struct thread *td __unused, void *dst __unused,
size_t *off __unused)
{
}
/*
* The following table holds for each relocation type:
* - the width in bits of the memory location the relocation
* applies to (not currently used)
* - the number of bits the relocation value must be shifted to the
* right (i.e. discard least significant bits) to fit into
* the appropriate field in the instruction word.
* - flags indicating whether
* * the relocation involves a symbol
* * the relocation is relative to the current position
* * the relocation is for a GOT entry
* * the relocation is relative to the load address
*
*/
#define _RF_S 0x80000000 /* Resolve symbol */
#define _RF_A 0x40000000 /* Use addend */
#define _RF_P 0x20000000 /* Location relative */
#define _RF_G 0x10000000 /* GOT offset */
#define _RF_B 0x08000000 /* Load address relative */
#define _RF_U 0x04000000 /* Unaligned */
#define _RF_X 0x02000000 /* Bare symbols, needs proc */
#define _RF_D 0x01000000 /* Use dynamic TLS offset */
#define _RF_O 0x00800000 /* Use static TLS offset */
#define _RF_I 0x00400000 /* Use TLS object ID */
#define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
#define _RF_RS(s) ( (s) & 0xff) /* right shift */
static const int reloc_target_flags[] = {
0, /* NONE */
_RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* 8 */
_RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* 16 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 32 */
_RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
_RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HI22 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 22 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 13 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LO10 */
_RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
_RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
_RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
_RF_SZ(32) | _RF_RS(0), /* COPY */
_RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
_RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
_RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */
_RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */
_RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
_RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
_RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 10 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 11 */
_RF_S|_RF_A|_RF_X| _RF_SZ(64) | _RF_RS(0), /* 64 */
_RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(42), /* HH22 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(32), /* HM10 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* LM22 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
_RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 7 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 5 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 6 */
_RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
_RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(22), /* H44 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(12), /* M44 */
_RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* L44 */
_RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
_RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
_RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
#if 0
/* TLS */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* GD_HI22 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GD_LO10 */
0, /* GD_ADD */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* GD_CALL */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDM_HI22 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDM_LO10 */
0, /* LDM_ADD */
_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* LDM_CALL */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDO_HIX22 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDO_LOX10 */
0, /* LDO_ADD */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* IE_HI22 */
_RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* IE_LO10 */
0, /* IE_LD */
0, /* IE_LDX */
0, /* IE_ADD */
_RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(10), /* LE_HIX22 */
_RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* LE_LOX10 */
_RF_S| _RF_I| _RF_SZ(32) | _RF_RS(0), /* DTPMOD32 */
_RF_S| _RF_I| _RF_SZ(64) | _RF_RS(0), /* DTPMOD64 */
_RF_S|_RF_A| _RF_D| _RF_SZ(32) | _RF_RS(0), /* DTPOFF32 */
_RF_S|_RF_A| _RF_D| _RF_SZ(64) | _RF_RS(0), /* DTPOFF64 */
_RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* TPOFF32 */
_RF_S|_RF_A| _RF_O| _RF_SZ(64) | _RF_RS(0) /* TPOFF64 */
#endif
};
#if 0
static const char *const reloc_names[] = {
"NONE", "8", "16", "32", "DISP_8", "DISP_16", "DISP_32", "WDISP_30",
"WDISP_22", "HI22", "22", "13", "LO10", "GOT10", "GOT13", "GOT22",
"PC10", "PC22", "WPLT30", "COPY", "GLOB_DAT", "JMP_SLOT", "RELATIVE",
"UA_32", "PLT32", "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22",
"PCPLT32", "10", "11", "64", "OLO10", "HH22", "HM10", "LM22",
"PC_HH22", "PC_HM10", "PC_LM22", "WDISP16", "WDISP19", "GLOB_JMP",
"7", "5", "6", "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44",
"L44", "REGISTER", "UA64", "UA16", "GD_HI22", "GD_LO10", "GD_ADD",
"GD_CALL", "LDM_HI22", "LDMO10", "LDM_ADD", "LDM_CALL", "LDO_HIX22",
"LDO_LOX10", "LDO_ADD", "IE_HI22", "IE_LO10", "IE_LD", "IE_LDX",
"IE_ADD", "LE_HIX22", "LE_LOX10", "DTPMOD32", "DTPMOD64", "DTPOFF32",
"DTPOFF64", "TPOFF32", "TPOFF64"
};
#endif
#define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
#define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
#define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
#define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
#define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
#define RELOC_BARE_SYMBOL(t) ((reloc_target_flags[t] & _RF_X) != 0)
#define RELOC_USE_TLS_DOFF(t) ((reloc_target_flags[t] & _RF_D) != 0)
#define RELOC_USE_TLS_OFF(t) ((reloc_target_flags[t] & _RF_O) != 0)
#define RELOC_USE_TLS_ID(t) ((reloc_target_flags[t] & _RF_I) != 0)
#define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
#define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
static const long reloc_target_bitmask[] = {
#define _BM(x) (~(-(1ULL << (x))))
0, /* NONE */
_BM(8), _BM(16), _BM(32), /* 8, 16, 32 */
_BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
_BM(30), _BM(22), /* WDISP30, WDISP22 */
_BM(22), _BM(22), /* HI22, 22 */
_BM(13), _BM(10), /* 13, LO10 */
_BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
_BM(10), _BM(22), /* PC10, PC22 */
_BM(30), 0, /* WPLT30, COPY */
_BM(32), _BM(32), _BM(32), /* GLOB_DAT, JMP_SLOT, RELATIVE */
_BM(32), _BM(32), /* UA32, PLT32 */
_BM(22), _BM(10), /* HIPLT22, LOPLT10 */
_BM(32), _BM(22), _BM(10), /* PCPLT32, PCPLT22, PCPLT10 */
_BM(10), _BM(11), -1, /* 10, 11, 64 */
_BM(13), _BM(22), /* OLO10, HH22 */
_BM(10), _BM(22), /* HM10, LM22 */
_BM(22), _BM(10), _BM(22), /* PC_HH22, PC_HM10, PC_LM22 */
_BM(16), _BM(19), /* WDISP16, WDISP19 */
-1, /* GLOB_JMP */
_BM(7), _BM(5), _BM(6), /* 7, 5, 6 */
-1, -1, /* DISP64, PLT64 */
_BM(22), _BM(13), /* HIX22, LOX10 */
_BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
-1, -1, _BM(16), /* REGISTER, UA64, UA16 */
#if 0
_BM(22), _BM(10), 0, _BM(30), /* GD_HI22, GD_LO10, GD_ADD, GD_CALL */
_BM(22), _BM(10), 0, /* LDM_HI22, LDMO10, LDM_ADD */
_BM(30), /* LDM_CALL */
_BM(22), _BM(10), 0, /* LDO_HIX22, LDO_LOX10, LDO_ADD */
_BM(22), _BM(10), 0, 0, /* IE_HI22, IE_LO10, IE_LD, IE_LDX */
0, /* IE_ADD */
_BM(22), _BM(13), /* LE_HIX22, LE_LOX10 */
_BM(32), -1, /* DTPMOD32, DTPMOD64 */
_BM(32), -1, /* DTPOFF32, DTPOFF64 */
_BM(32), -1 /* TPOFF32, TPOFF64 */
#endif
#undef _BM
};
#define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
int
elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
int type, elf_lookup_fn lookup __unused)
{
const Elf_Rela *rela;
Elf_Addr *where;
if (type != ELF_RELOC_RELA)
return (-1);
rela = (const Elf_Rela *)data;
if (ELF64_R_TYPE_ID(rela->r_info) != R_SPARC_RELATIVE)
return (-1);
where = (Elf_Addr *)(relocbase + rela->r_offset);
*where = elf_relocaddr(lf, rela->r_addend + relocbase);
return (0);
}
/* Process one elf relocation with addend. */
int
elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
elf_lookup_fn lookup)
{
const Elf_Rela *rela;
Elf_Word *where32;
Elf_Addr *where;
Elf_Size rtype, symidx;
Elf_Addr value;
Elf_Addr mask;
Elf_Addr addr;
if (type != ELF_RELOC_RELA)
return (-1);
rela = (const Elf_Rela *)data;
where = (Elf_Addr *)(relocbase + rela->r_offset);
where32 = (Elf_Word *)where;
rtype = ELF64_R_TYPE_ID(rela->r_info);
symidx = ELF_R_SYM(rela->r_info);
if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE)
return (0);
if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
rtype >= sizeof(reloc_target_bitmask) /
sizeof(*reloc_target_bitmask)) {
printf("kldload: unexpected relocation type %ld\n", rtype);
return (-1);
}
if (RELOC_UNALIGNED(rtype)) {
printf("kldload: unaligned relocation type %ld\n", rtype);
return (-1);
}
value = rela->r_addend;
if (RELOC_RESOLVE_SYMBOL(rtype)) {
addr = lookup(lf, symidx, 1);
if (addr == 0)
return (-1);
value += addr;
if (RELOC_BARE_SYMBOL(rtype))
value = elf_relocaddr(lf, value);
}
if (rtype == R_SPARC_OLO10)
value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
if (rtype == R_SPARC_HIX22)
value ^= 0xffffffffffffffff;
if (RELOC_PC_RELATIVE(rtype))
value -= (Elf_Addr)where;
if (RELOC_BASE_RELATIVE(rtype))
value = elf_relocaddr(lf, value + relocbase);
mask = RELOC_VALUE_BITMASK(rtype);
value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
value &= mask;
if (rtype == R_SPARC_LOX10)
value |= 0x1c00;
if (RELOC_TARGET_SIZE(rtype) > 32) {
*where &= ~mask;
*where |= value;
} else {
*where32 &= ~mask;
*where32 |= value;
}
return (0);
}
int
elf_cpu_load_file(linker_file_t lf __unused)
{
return (0);
}
int
elf_cpu_unload_file(linker_file_t lf __unused)
{
return (0);
}