2 * Copyright (c) 2001 Jake Burkholder.
3 * Copyright (c) 2000 Eduardo Horvath.
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
38 * from: NetBSD: mdreloc.c,v 1.5 2001/04/25 12:24:51 kleink Exp
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/systm.h>
48 #include <sys/imgact.h>
49 #include <sys/linker.h>
51 #include <sys/sysent.h>
52 #include <sys/imgact_elf.h>
53 #include <sys/syscall.h>
54 #include <sys/signalvar.h>
55 #include <sys/vnode.h>
58 #include <vm/vm_param.h>
60 #include <machine/elf.h>
62 #include "linker_if.h"
64 static struct sysentvec elf64_freebsd_sysvec = {
65 .sv_size = SYS_MAXSYSCALL,
73 .sv_fixup = __elfN(freebsd_fixup),
74 .sv_sendsig = sendsig,
77 .sv_prepsyscall = NULL,
78 .sv_name = "FreeBSD ELF64",
79 .sv_coredump = __elfN(coredump),
80 .sv_imgact_try = NULL,
81 .sv_minsigstksz = MINSIGSTKSZ,
82 .sv_pagesize = PAGE_SIZE,
83 .sv_minuser = VM_MIN_ADDRESS,
84 .sv_maxuser = VM_MAXUSER_ADDRESS,
85 .sv_usrstack = USRSTACK,
86 .sv_psstrings = PS_STRINGS,
87 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
88 .sv_copyout_strings = exec_copyout_strings,
89 .sv_setregs = exec_setregs,
92 .sv_flags = SV_ABI_FREEBSD | SV_LP64,
93 .sv_set_syscall_retval = cpu_set_syscall_retval,
94 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
95 .sv_syscallnames = syscallnames,
98 static Elf64_Brandinfo freebsd_brand_info = {
99 .brand = ELFOSABI_FREEBSD,
100 .machine = EM_SPARCV9,
101 .compat_3_brand = "FreeBSD",
103 .interp_path = "/libexec/ld-elf.so.1",
104 .sysvec = &elf64_freebsd_sysvec,
105 .interp_newpath = NULL,
106 .brand_note = &elf64_freebsd_brandnote,
107 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
110 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
111 (sysinit_cfunc_t) elf64_insert_brand_entry,
112 &freebsd_brand_info);
114 static Elf64_Brandinfo freebsd_brand_oinfo = {
115 .brand = ELFOSABI_FREEBSD,
116 .machine = EM_SPARCV9,
117 .compat_3_brand = "FreeBSD",
119 .interp_path = "/usr/libexec/ld-elf.so.1",
120 .sysvec = &elf64_freebsd_sysvec,
121 .interp_newpath = NULL,
122 .brand_note = &elf64_freebsd_brandnote,
123 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
126 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
127 (sysinit_cfunc_t) elf64_insert_brand_entry,
128 &freebsd_brand_oinfo);
132 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
133 size_t *off __unused)
139 * The following table holds for each relocation type:
140 * - the width in bits of the memory location the relocation
141 * applies to (not currently used)
142 * - the number of bits the relocation value must be shifted to the
143 * right (i.e. discard least significant bits) to fit into
144 * the appropriate field in the instruction word.
145 * - flags indicating whether
146 * * the relocation involves a symbol
147 * * the relocation is relative to the current position
148 * * the relocation is for a GOT entry
149 * * the relocation is relative to the load address
152 #define _RF_S 0x80000000 /* Resolve symbol */
153 #define _RF_A 0x40000000 /* Use addend */
154 #define _RF_P 0x20000000 /* Location relative */
155 #define _RF_G 0x10000000 /* GOT offset */
156 #define _RF_B 0x08000000 /* Load address relative */
157 #define _RF_U 0x04000000 /* Unaligned */
158 #define _RF_X 0x02000000 /* Bare symbols, needs proc */
159 #define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
160 #define _RF_RS(s) ( (s) & 0xff) /* right shift */
161 static const int reloc_target_flags[] = {
163 _RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* RELOC_8 */
164 _RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* RELOC_16 */
165 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* RELOC_32 */
166 _RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
167 _RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
168 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
169 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
170 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
171 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HI22 */
172 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 22 */
173 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 13 */
174 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LO10 */
175 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
176 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
177 _RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
178 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
179 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
180 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
181 _RF_SZ(32) | _RF_RS(0), /* COPY */
182 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
183 _RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
184 _RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */
185 _RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */
187 _RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
188 _RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
189 _RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
190 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
191 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
192 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
193 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 10 */
194 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 11 */
195 _RF_S|_RF_A|_RF_X| _RF_SZ(64) | _RF_RS(0), /* 64 */
196 _RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
197 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(42), /* HH22 */
198 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(32), /* HM10 */
199 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* LM22 */
200 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
201 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
202 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
203 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
204 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
205 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
206 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 7 */
207 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 5 */
208 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 6 */
209 _RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
210 _RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
211 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
212 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
213 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(22), /* H44 */
214 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(12), /* M44 */
215 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* L44 */
216 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
217 _RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
218 _RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
222 static const char *const reloc_names[] = {
223 "NONE", "RELOC_8", "RELOC_16", "RELOC_32", "DISP_8",
224 "DISP_16", "DISP_32", "WDISP_30", "WDISP_22", "HI22",
225 "22", "13", "LO10", "GOT10", "GOT13",
226 "GOT22", "PC10", "PC22", "WPLT30", "COPY",
227 "GLOB_DAT", "JMP_SLOT", "RELATIVE", "UA_32", "PLT32",
228 "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22", "PCPLT32",
229 "10", "11", "64", "OLO10", "HH22",
230 "HM10", "LM22", "PC_HH22", "PC_HM10", "PC_LM22",
231 "WDISP16", "WDISP19", "GLOB_JMP", "7", "5", "6",
232 "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44",
233 "L44", "REGISTER", "UA64", "UA16"
237 #define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
238 #define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
239 #define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
240 #define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
241 #define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
242 #define RELOC_BARE_SYMBOL(t) ((reloc_target_flags[t] & _RF_X) != 0)
243 #define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
244 #define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
246 static const long reloc_target_bitmask[] = {
247 #define _BM(x) (~(-(1ULL << (x))))
249 _BM(8), _BM(16), _BM(32), /* RELOC_8, _16, _32 */
250 _BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
251 _BM(30), _BM(22), /* WDISP30, WDISP22 */
252 _BM(22), _BM(22), /* HI22, _22 */
253 _BM(13), _BM(10), /* RELOC_13, _LO10 */
254 _BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
255 _BM(10), _BM(22), /* _PC10, _PC22 */
256 _BM(30), 0, /* _WPLT30, _COPY */
257 _BM(32), _BM(32), _BM(32), /* _GLOB_DAT, JMP_SLOT, _RELATIVE */
258 _BM(32), _BM(32), /* _UA32, PLT32 */
259 _BM(22), _BM(10), /* _HIPLT22, LOPLT10 */
260 _BM(32), _BM(22), _BM(10), /* _PCPLT32, _PCPLT22, _PCPLT10 */
261 _BM(10), _BM(11), -1, /* _10, _11, _64 */
262 _BM(13), _BM(22), /* _OLO10, _HH22 */
263 _BM(10), _BM(22), /* _HM10, _LM22 */
264 _BM(22), _BM(10), _BM(22), /* _PC_HH22, _PC_HM10, _PC_LM22 */
265 _BM(16), _BM(19), /* _WDISP16, _WDISP19 */
267 _BM(7), _BM(5), _BM(6) /* _7, _5, _6 */
268 -1, -1, /* DISP64, PLT64 */
269 _BM(22), _BM(13), /* HIX22, LOX10 */
270 _BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
271 -1, -1, _BM(16), /* REGISTER, UA64, UA16 */
274 #define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
277 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
278 int type, elf_lookup_fn lookup __unused)
280 const Elf_Rela *rela;
283 if (type != ELF_RELOC_RELA)
286 rela = (const Elf_Rela *)data;
287 if (ELF64_R_TYPE_ID(rela->r_info) != R_SPARC_RELATIVE)
290 where = (Elf_Addr *)(relocbase + rela->r_offset);
291 *where = elf_relocaddr(lf, rela->r_addend + relocbase);
296 /* Process one elf relocation with addend. */
298 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
299 elf_lookup_fn lookup)
301 const Elf_Rela *rela;
304 Elf_Size rtype, symidx;
309 if (type != ELF_RELOC_RELA)
312 rela = (const Elf_Rela *)data;
313 where = (Elf_Addr *)(relocbase + rela->r_offset);
314 where32 = (Elf_Word *)where;
315 rtype = ELF64_R_TYPE_ID(rela->r_info);
316 symidx = ELF_R_SYM(rela->r_info);
318 if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE)
321 if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
322 rtype >= sizeof(reloc_target_bitmask) /
323 sizeof(*reloc_target_bitmask))
326 if (RELOC_UNALIGNED(rtype))
329 value = rela->r_addend;
331 if (RELOC_RESOLVE_SYMBOL(rtype)) {
332 addr = lookup(lf, symidx, 1);
336 if (RELOC_BARE_SYMBOL(rtype))
337 value = elf_relocaddr(lf, value);
340 if (rtype == R_SPARC_OLO10)
341 value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
343 if (RELOC_PC_RELATIVE(rtype))
344 value -= (Elf_Addr)where;
346 if (RELOC_BASE_RELATIVE(rtype))
347 value = elf_relocaddr(lf, value + relocbase);
349 mask = RELOC_VALUE_BITMASK(rtype);
350 value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
353 if (RELOC_TARGET_SIZE(rtype) > 32) {
365 elf_cpu_load_file(linker_file_t lf __unused)
372 elf_cpu_unload_file(linker_file_t lf __unused)