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.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
31 * from: NetBSD: mdreloc.c,v 1.42 2008/04/28 20:23:04 martin Exp
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/systm.h>
41 #include <sys/imgact.h>
42 #include <sys/linker.h>
44 #include <sys/sysent.h>
45 #include <sys/imgact_elf.h>
46 #include <sys/syscall.h>
47 #include <sys/signalvar.h>
48 #include <sys/vnode.h>
51 #include <vm/vm_param.h>
53 #include <machine/elf.h>
55 #include "linker_if.h"
57 static struct sysentvec elf64_freebsd_sysvec = {
58 .sv_size = SYS_MAXSYSCALL,
66 .sv_fixup = __elfN(freebsd_fixup),
67 .sv_sendsig = sendsig,
70 .sv_prepsyscall = NULL,
71 .sv_name = "FreeBSD ELF64",
72 .sv_coredump = __elfN(coredump),
73 .sv_imgact_try = NULL,
74 .sv_minsigstksz = MINSIGSTKSZ,
75 .sv_pagesize = PAGE_SIZE,
76 .sv_minuser = VM_MIN_ADDRESS,
77 .sv_maxuser = VM_MAXUSER_ADDRESS,
78 .sv_usrstack = USRSTACK,
79 .sv_psstrings = PS_STRINGS,
80 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
81 .sv_copyout_strings = exec_copyout_strings,
82 .sv_setregs = exec_setregs,
85 .sv_flags = SV_ABI_FREEBSD | SV_LP64,
86 .sv_set_syscall_retval = cpu_set_syscall_retval,
87 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
88 .sv_syscallnames = syscallnames,
90 .sv_thread_detach = NULL,
94 static Elf64_Brandinfo freebsd_brand_info = {
95 .brand = ELFOSABI_FREEBSD,
96 .machine = EM_SPARCV9,
97 .compat_3_brand = "FreeBSD",
99 .interp_path = "/libexec/ld-elf.so.1",
100 .sysvec = &elf64_freebsd_sysvec,
101 .interp_newpath = NULL,
102 .brand_note = &elf64_freebsd_brandnote,
103 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
106 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
107 (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_info);
109 static Elf64_Brandinfo freebsd_brand_oinfo = {
110 .brand = ELFOSABI_FREEBSD,
111 .machine = EM_SPARCV9,
112 .compat_3_brand = "FreeBSD",
114 .interp_path = "/usr/libexec/ld-elf.so.1",
115 .sysvec = &elf64_freebsd_sysvec,
116 .interp_newpath = NULL,
117 .brand_note = &elf64_freebsd_brandnote,
118 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
121 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
122 (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_oinfo);
125 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
126 size_t *off __unused)
132 * The following table holds for each relocation type:
133 * - the width in bits of the memory location the relocation
134 * applies to (not currently used)
135 * - the number of bits the relocation value must be shifted to the
136 * right (i.e. discard least significant bits) to fit into
137 * the appropriate field in the instruction word.
138 * - flags indicating whether
139 * * the relocation involves a symbol
140 * * the relocation is relative to the current position
141 * * the relocation is for a GOT entry
142 * * the relocation is relative to the load address
145 #define _RF_S 0x80000000 /* Resolve symbol */
146 #define _RF_A 0x40000000 /* Use addend */
147 #define _RF_P 0x20000000 /* Location relative */
148 #define _RF_G 0x10000000 /* GOT offset */
149 #define _RF_B 0x08000000 /* Load address relative */
150 #define _RF_U 0x04000000 /* Unaligned */
151 #define _RF_X 0x02000000 /* Bare symbols, needs proc */
152 #define _RF_D 0x01000000 /* Use dynamic TLS offset */
153 #define _RF_O 0x00800000 /* Use static TLS offset */
154 #define _RF_I 0x00400000 /* Use TLS object ID */
155 #define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
156 #define _RF_RS(s) ( (s) & 0xff) /* right shift */
157 static const int reloc_target_flags[] = {
159 _RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* 8 */
160 _RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* 16 */
161 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 32 */
162 _RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
163 _RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
164 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
165 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
166 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
167 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HI22 */
168 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 22 */
169 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 13 */
170 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LO10 */
171 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
172 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
173 _RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
174 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
175 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
176 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
177 _RF_SZ(32) | _RF_RS(0), /* COPY */
178 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
179 _RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
180 _RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */
181 _RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */
183 _RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
184 _RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
185 _RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
186 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
187 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
188 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
189 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 10 */
190 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 11 */
191 _RF_S|_RF_A|_RF_X| _RF_SZ(64) | _RF_RS(0), /* 64 */
192 _RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
193 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(42), /* HH22 */
194 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(32), /* HM10 */
195 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* LM22 */
196 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
197 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
198 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
199 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
200 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
201 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
202 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 7 */
203 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 5 */
204 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* 6 */
205 _RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
206 _RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
207 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
208 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
209 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(22), /* H44 */
210 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(12), /* M44 */
211 _RF_S|_RF_A|_RF_X| _RF_SZ(32) | _RF_RS(0), /* L44 */
212 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
213 _RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
214 _RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
218 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* GD_HI22 */
219 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GD_LO10 */
221 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* GD_CALL */
222 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDM_HI22 */
223 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDM_LO10 */
225 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* LDM_CALL */
226 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LDO_HIX22 */
227 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LDO_LOX10 */
229 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* IE_HI22 */
230 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* IE_LO10 */
234 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(10), /* LE_HIX22 */
235 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* LE_LOX10 */
236 _RF_S| _RF_I| _RF_SZ(32) | _RF_RS(0), /* DTPMOD32 */
237 _RF_S| _RF_I| _RF_SZ(64) | _RF_RS(0), /* DTPMOD64 */
238 _RF_S|_RF_A| _RF_D| _RF_SZ(32) | _RF_RS(0), /* DTPOFF32 */
239 _RF_S|_RF_A| _RF_D| _RF_SZ(64) | _RF_RS(0), /* DTPOFF64 */
240 _RF_S|_RF_A| _RF_O| _RF_SZ(32) | _RF_RS(0), /* TPOFF32 */
241 _RF_S|_RF_A| _RF_O| _RF_SZ(64) | _RF_RS(0) /* TPOFF64 */
246 static const char *const reloc_names[] = {
247 "NONE", "8", "16", "32", "DISP_8", "DISP_16", "DISP_32", "WDISP_30",
248 "WDISP_22", "HI22", "22", "13", "LO10", "GOT10", "GOT13", "GOT22",
249 "PC10", "PC22", "WPLT30", "COPY", "GLOB_DAT", "JMP_SLOT", "RELATIVE",
250 "UA_32", "PLT32", "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22",
251 "PCPLT32", "10", "11", "64", "OLO10", "HH22", "HM10", "LM22",
252 "PC_HH22", "PC_HM10", "PC_LM22", "WDISP16", "WDISP19", "GLOB_JMP",
253 "7", "5", "6", "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44",
254 "L44", "REGISTER", "UA64", "UA16", "GD_HI22", "GD_LO10", "GD_ADD",
255 "GD_CALL", "LDM_HI22", "LDMO10", "LDM_ADD", "LDM_CALL", "LDO_HIX22",
256 "LDO_LOX10", "LDO_ADD", "IE_HI22", "IE_LO10", "IE_LD", "IE_LDX",
257 "IE_ADD", "LE_HIX22", "LE_LOX10", "DTPMOD32", "DTPMOD64", "DTPOFF32",
258 "DTPOFF64", "TPOFF32", "TPOFF64"
262 #define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
263 #define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
264 #define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
265 #define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
266 #define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
267 #define RELOC_BARE_SYMBOL(t) ((reloc_target_flags[t] & _RF_X) != 0)
268 #define RELOC_USE_TLS_DOFF(t) ((reloc_target_flags[t] & _RF_D) != 0)
269 #define RELOC_USE_TLS_OFF(t) ((reloc_target_flags[t] & _RF_O) != 0)
270 #define RELOC_USE_TLS_ID(t) ((reloc_target_flags[t] & _RF_I) != 0)
271 #define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
272 #define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
274 static const long reloc_target_bitmask[] = {
275 #define _BM(x) (~(-(1ULL << (x))))
277 _BM(8), _BM(16), _BM(32), /* 8, 16, 32 */
278 _BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
279 _BM(30), _BM(22), /* WDISP30, WDISP22 */
280 _BM(22), _BM(22), /* HI22, 22 */
281 _BM(13), _BM(10), /* 13, LO10 */
282 _BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
283 _BM(10), _BM(22), /* PC10, PC22 */
284 _BM(30), 0, /* WPLT30, COPY */
285 _BM(32), _BM(32), _BM(32), /* GLOB_DAT, JMP_SLOT, RELATIVE */
286 _BM(32), _BM(32), /* UA32, PLT32 */
287 _BM(22), _BM(10), /* HIPLT22, LOPLT10 */
288 _BM(32), _BM(22), _BM(10), /* PCPLT32, PCPLT22, PCPLT10 */
289 _BM(10), _BM(11), -1, /* 10, 11, 64 */
290 _BM(13), _BM(22), /* OLO10, HH22 */
291 _BM(10), _BM(22), /* HM10, LM22 */
292 _BM(22), _BM(10), _BM(22), /* PC_HH22, PC_HM10, PC_LM22 */
293 _BM(16), _BM(19), /* WDISP16, WDISP19 */
295 _BM(7), _BM(5), _BM(6), /* 7, 5, 6 */
296 -1, -1, /* DISP64, PLT64 */
297 _BM(22), _BM(13), /* HIX22, LOX10 */
298 _BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
299 -1, -1, _BM(16), /* REGISTER, UA64, UA16 */
301 _BM(22), _BM(10), 0, _BM(30), /* GD_HI22, GD_LO10, GD_ADD, GD_CALL */
302 _BM(22), _BM(10), 0, /* LDM_HI22, LDMO10, LDM_ADD */
303 _BM(30), /* LDM_CALL */
304 _BM(22), _BM(10), 0, /* LDO_HIX22, LDO_LOX10, LDO_ADD */
305 _BM(22), _BM(10), 0, 0, /* IE_HI22, IE_LO10, IE_LD, IE_LDX */
307 _BM(22), _BM(13), /* LE_HIX22, LE_LOX10 */
308 _BM(32), -1, /* DTPMOD32, DTPMOD64 */
309 _BM(32), -1, /* DTPOFF32, DTPOFF64 */
310 _BM(32), -1 /* TPOFF32, TPOFF64 */
314 #define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
317 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
318 int type, elf_lookup_fn lookup __unused)
320 const Elf_Rela *rela;
323 if (type != ELF_RELOC_RELA)
326 rela = (const Elf_Rela *)data;
327 if (ELF64_R_TYPE_ID(rela->r_info) != R_SPARC_RELATIVE)
330 where = (Elf_Addr *)(relocbase + rela->r_offset);
331 *where = elf_relocaddr(lf, rela->r_addend + relocbase);
336 /* Process one elf relocation with addend. */
338 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
339 elf_lookup_fn lookup)
341 const Elf_Rela *rela;
344 Elf_Size rtype, symidx;
350 if (type != ELF_RELOC_RELA)
353 rela = (const Elf_Rela *)data;
354 where = (Elf_Addr *)(relocbase + rela->r_offset);
355 where32 = (Elf_Word *)where;
356 rtype = ELF64_R_TYPE_ID(rela->r_info);
357 symidx = ELF_R_SYM(rela->r_info);
359 if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE)
362 if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
363 rtype >= sizeof(reloc_target_bitmask) /
364 sizeof(*reloc_target_bitmask)) {
365 printf("kldload: unexpected relocation type %ld\n", rtype);
369 if (RELOC_UNALIGNED(rtype)) {
370 printf("kldload: unaligned relocation type %ld\n", rtype);
374 value = rela->r_addend;
376 if (RELOC_RESOLVE_SYMBOL(rtype)) {
377 error = lookup(lf, symidx, 1, &addr);
381 if (RELOC_BARE_SYMBOL(rtype))
382 value = elf_relocaddr(lf, value);
385 if (rtype == R_SPARC_OLO10)
386 value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
388 if (rtype == R_SPARC_HIX22)
389 value ^= 0xffffffffffffffff;
391 if (RELOC_PC_RELATIVE(rtype))
392 value -= (Elf_Addr)where;
394 if (RELOC_BASE_RELATIVE(rtype))
395 value = elf_relocaddr(lf, value + relocbase);
397 mask = RELOC_VALUE_BITMASK(rtype);
398 value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
401 if (rtype == R_SPARC_LOX10)
404 if (RELOC_TARGET_SIZE(rtype) > 32) {
416 elf_cpu_load_file(linker_file_t lf __unused)
423 elf_cpu_unload_file(linker_file_t lf __unused)