2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
4 * Copyright (c) 2001 Jake Burkholder.
5 * Copyright (c) 2000 Eduardo Horvath.
6 * Copyright (c) 1999 The NetBSD Foundation, Inc.
9 * This code is derived from software contributed to The NetBSD Foundation
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
33 * from: NetBSD: mdreloc.c,v 1.42 2008/04/28 20:23:04 martin Exp
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/systm.h>
43 #include <sys/imgact.h>
44 #include <sys/linker.h>
46 #include <sys/sysent.h>
47 #include <sys/imgact_elf.h>
48 #include <sys/syscall.h>
49 #include <sys/signalvar.h>
50 #include <sys/vnode.h>
53 #include <vm/vm_param.h>
55 #include <machine/elf.h>
57 #include "linker_if.h"
59 static struct sysentvec elf64_freebsd_sysvec = {
60 .sv_size = SYS_MAXSYSCALL,
66 .sv_fixup = __elfN(freebsd_fixup),
67 .sv_sendsig = sendsig,
70 .sv_name = "FreeBSD ELF64",
71 .sv_coredump = __elfN(coredump),
72 .sv_imgact_try = NULL,
73 .sv_minsigstksz = MINSIGSTKSZ,
74 .sv_pagesize = PAGE_SIZE,
75 .sv_minuser = VM_MIN_ADDRESS,
76 .sv_maxuser = VM_MAXUSER_ADDRESS,
77 .sv_usrstack = USRSTACK,
78 .sv_psstrings = PS_STRINGS,
79 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
80 .sv_copyout_strings = exec_copyout_strings,
81 .sv_setregs = exec_setregs,
84 .sv_flags = SV_ABI_FREEBSD | SV_LP64,
85 .sv_set_syscall_retval = cpu_set_syscall_retval,
86 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
87 .sv_syscallnames = syscallnames,
89 .sv_thread_detach = NULL,
93 static Elf64_Brandinfo freebsd_brand_info = {
94 .brand = ELFOSABI_FREEBSD,
95 .machine = EM_SPARCV9,
96 .compat_3_brand = "FreeBSD",
98 .interp_path = "/libexec/ld-elf.so.1",
99 .sysvec = &elf64_freebsd_sysvec,
100 .interp_newpath = NULL,
101 .brand_note = &elf64_freebsd_brandnote,
102 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
105 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
106 (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_info);
108 static Elf64_Brandinfo freebsd_brand_oinfo = {
109 .brand = ELFOSABI_FREEBSD,
110 .machine = EM_SPARCV9,
111 .compat_3_brand = "FreeBSD",
113 .interp_path = "/usr/libexec/ld-elf.so.1",
114 .sysvec = &elf64_freebsd_sysvec,
115 .interp_newpath = NULL,
116 .brand_note = &elf64_freebsd_brandnote,
117 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
120 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
121 (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_oinfo);
124 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
125 size_t *off __unused)
131 * The following table holds for each relocation type:
132 * - the width in bits of the memory location the relocation
133 * applies to (not currently used)
134 * - the number of bits the relocation value must be shifted to the
135 * right (i.e. discard least significant bits) to fit into
136 * the appropriate field in the instruction word.
137 * - flags indicating whether
138 * * the relocation involves a symbol
139 * * the relocation is relative to the current position
140 * * the relocation is for a GOT entry
141 * * the relocation is relative to the load address
144 #define _RF_S 0x80000000 /* Resolve symbol */
145 #define _RF_A 0x40000000 /* Use addend */
146 #define _RF_P 0x20000000 /* Location relative */
147 #define _RF_G 0x10000000 /* GOT offset */
148 #define _RF_B 0x08000000 /* Load address relative */
149 #define _RF_U 0x04000000 /* Unaligned */
150 #define _RF_X 0x02000000 /* Bare symbols, needs proc */
151 #define _RF_D 0x01000000 /* Use dynamic TLS offset */
152 #define _RF_O 0x00800000 /* Use static TLS offset */
153 #define _RF_I 0x00400000 /* Use TLS object ID */
154 #define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
155 #define _RF_RS(s) ( (s) & 0xff) /* right shift */
156 static const int reloc_target_flags[] = {
158 _RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* 8 */
159 _RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* 16 */
160 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 32 */
161 _RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
162 _RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
163 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
164 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
165 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
166 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HI22 */
167 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 22 */
168 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 13 */
169 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LO10 */
170 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
171 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
172 _RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
173 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
174 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
175 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
176 _RF_SZ(32) | _RF_RS(0), /* COPY */
177 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
178 _RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
179 _RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */
180 _RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */
182 _RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
183 _RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
184 _RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
185 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
186 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
187 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
188 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 10 */
189 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 11 */
190 _RF_S|_RF_A|_RF_X| _RF_SZ(64) | _RF_RS(0), /* 64 */
191 _RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
192 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(42), /* HH22 */
193 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(32), /* HM10 */
194 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* LM22 */
195 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
196 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
197 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
198 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
199 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
200 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
201 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 7 */
202 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 5 */
203 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 6 */
204 _RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
205 _RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
206 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
207 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
208 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(22), /* H44 */
209 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(12), /* M44 */
210 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* L44 */
211 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
212 _RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
213 _RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
217 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* GD_HI22 */
218 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GD_LO10 */
220 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* GD_CALL */
221 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDM_HI22 */
222 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDM_LO10 */
224 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* LDM_CALL */
225 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDO_HIX22 */
226 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDO_LOX10 */
228 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* IE_HI22 */
229 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* IE_LO10 */
233 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(10), /* LE_HIX22 */
234 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* LE_LOX10 */
235 _RF_S| _RF_I| _RF_SZ(32) | _RF_RS(0), /* DTPMOD32 */
236 _RF_S| _RF_I| _RF_SZ(64) | _RF_RS(0), /* DTPMOD64 */
237 _RF_S|_RF_A| _RF_D| _RF_SZ(32) | _RF_RS(0), /* DTPOFF32 */
238 _RF_S|_RF_A| _RF_D| _RF_SZ(64) | _RF_RS(0), /* DTPOFF64 */
239 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* TPOFF32 */
240 _RF_S|_RF_A| _RF_O| _RF_SZ(64) | _RF_RS(0) /* TPOFF64 */
245 static const char *const reloc_names[] = {
246 "NONE", "8", "16", "32", "DISP_8", "DISP_16", "DISP_32", "WDISP_30",
247 "WDISP_22", "HI22", "22", "13", "LO10", "GOT10", "GOT13", "GOT22",
248 "PC10", "PC22", "WPLT30", "COPY", "GLOB_DAT", "JMP_SLOT", "RELATIVE",
249 "UA_32", "PLT32", "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22",
250 "PCPLT32", "10", "11", "64", "OLO10", "HH22", "HM10", "LM22",
251 "PC_HH22", "PC_HM10", "PC_LM22", "WDISP16", "WDISP19", "GLOB_JMP",
252 "7", "5", "6", "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44",
253 "L44", "REGISTER", "UA64", "UA16", "GD_HI22", "GD_LO10", "GD_ADD",
254 "GD_CALL", "LDM_HI22", "LDMO10", "LDM_ADD", "LDM_CALL", "LDO_HIX22",
255 "LDO_LOX10", "LDO_ADD", "IE_HI22", "IE_LO10", "IE_LD", "IE_LDX",
256 "IE_ADD", "LE_HIX22", "LE_LOX10", "DTPMOD32", "DTPMOD64", "DTPOFF32",
257 "DTPOFF64", "TPOFF32", "TPOFF64"
261 #define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
262 #define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
263 #define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
264 #define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
265 #define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
266 #define RELOC_BARE_SYMBOL(t) ((reloc_target_flags[t] & _RF_X) != 0)
267 #define RELOC_USE_TLS_DOFF(t) ((reloc_target_flags[t] & _RF_D) != 0)
268 #define RELOC_USE_TLS_OFF(t) ((reloc_target_flags[t] & _RF_O) != 0)
269 #define RELOC_USE_TLS_ID(t) ((reloc_target_flags[t] & _RF_I) != 0)
270 #define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
271 #define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
273 static const long reloc_target_bitmask[] = {
274 #define _BM(x) (~(-(1ULL << (x))))
276 _BM(8), _BM(16), _BM(32), /* 8, 16, 32 */
277 _BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
278 _BM(30), _BM(22), /* WDISP30, WDISP22 */
279 _BM(22), _BM(22), /* HI22, 22 */
280 _BM(13), _BM(10), /* 13, LO10 */
281 _BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
282 _BM(10), _BM(22), /* PC10, PC22 */
283 _BM(30), 0, /* WPLT30, COPY */
284 _BM(32), _BM(32), _BM(32), /* GLOB_DAT, JMP_SLOT, RELATIVE */
285 _BM(32), _BM(32), /* UA32, PLT32 */
286 _BM(22), _BM(10), /* HIPLT22, LOPLT10 */
287 _BM(32), _BM(22), _BM(10), /* PCPLT32, PCPLT22, PCPLT10 */
288 _BM(10), _BM(11), -1, /* 10, 11, 64 */
289 _BM(13), _BM(22), /* OLO10, HH22 */
290 _BM(10), _BM(22), /* HM10, LM22 */
291 _BM(22), _BM(10), _BM(22), /* PC_HH22, PC_HM10, PC_LM22 */
292 _BM(16), _BM(19), /* WDISP16, WDISP19 */
294 _BM(7), _BM(5), _BM(6), /* 7, 5, 6 */
295 -1, -1, /* DISP64, PLT64 */
296 _BM(22), _BM(13), /* HIX22, LOX10 */
297 _BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
298 -1, -1, _BM(16), /* REGISTER, UA64, UA16 */
300 _BM(22), _BM(10), 0, _BM(30), /* GD_HI22, GD_LO10, GD_ADD, GD_CALL */
301 _BM(22), _BM(10), 0, /* LDM_HI22, LDMO10, LDM_ADD */
302 _BM(30), /* LDM_CALL */
303 _BM(22), _BM(10), 0, /* LDO_HIX22, LDO_LOX10, LDO_ADD */
304 _BM(22), _BM(10), 0, 0, /* IE_HI22, IE_LO10, IE_LD, IE_LDX */
306 _BM(22), _BM(13), /* LE_HIX22, LE_LOX10 */
307 _BM(32), -1, /* DTPMOD32, DTPMOD64 */
308 _BM(32), -1, /* DTPOFF32, DTPOFF64 */
309 _BM(32), -1 /* TPOFF32, TPOFF64 */
313 #define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
316 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
317 int type, elf_lookup_fn lookup __unused)
319 const Elf_Rela *rela;
322 if (type != ELF_RELOC_RELA)
325 rela = (const Elf_Rela *)data;
326 if (ELF64_R_TYPE_ID(rela->r_info) != R_SPARC_RELATIVE)
329 where = (Elf_Addr *)(relocbase + rela->r_offset);
330 *where = elf_relocaddr(lf, rela->r_addend + relocbase);
335 /* Process one elf relocation with addend. */
337 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
338 elf_lookup_fn lookup)
340 const Elf_Rela *rela;
343 Elf_Size rtype, symidx;
349 if (type != ELF_RELOC_RELA)
352 rela = (const Elf_Rela *)data;
353 where = (Elf_Addr *)(relocbase + rela->r_offset);
354 where32 = (Elf_Word *)where;
355 rtype = ELF64_R_TYPE_ID(rela->r_info);
356 symidx = ELF_R_SYM(rela->r_info);
358 if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE)
361 if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
362 rtype >= nitems(reloc_target_bitmask)) {
363 printf("kldload: unexpected relocation type %ld\n", rtype);
367 if (RELOC_UNALIGNED(rtype)) {
368 printf("kldload: unaligned relocation type %ld\n", rtype);
372 value = rela->r_addend;
374 if (RELOC_RESOLVE_SYMBOL(rtype)) {
375 error = lookup(lf, symidx, 1, &addr);
379 if (RELOC_BARE_SYMBOL(rtype))
380 value = elf_relocaddr(lf, value);
383 if (rtype == R_SPARC_OLO10)
384 value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
386 if (rtype == R_SPARC_HIX22)
387 value ^= 0xffffffffffffffff;
389 if (RELOC_PC_RELATIVE(rtype))
390 value -= (Elf_Addr)where;
392 if (RELOC_BASE_RELATIVE(rtype))
393 value = elf_relocaddr(lf, value + relocbase);
395 mask = RELOC_VALUE_BITMASK(rtype);
396 value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
399 if (rtype == R_SPARC_LOX10)
402 if (RELOC_TARGET_SIZE(rtype) > 32) {
414 elf_cpu_load_file(linker_file_t lf __unused)
421 elf_cpu_unload_file(linker_file_t lf __unused)