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>
50 #include <sys/sysent.h>
51 #include <sys/imgact_elf.h>
52 #include <sys/syscall.h>
53 #include <sys/signalvar.h>
54 #include <sys/vnode.h>
57 #include <vm/vm_param.h>
59 #include <machine/elf.h>
61 #include "linker_if.h"
63 static struct sysentvec elf64_freebsd_sysvec = {
64 .sv_size = SYS_MAXSYSCALL,
72 .sv_fixup = __elfN(freebsd_fixup),
73 .sv_sendsig = sendsig,
76 .sv_prepsyscall = NULL,
77 .sv_name = "FreeBSD ELF64",
78 .sv_coredump = __elfN(coredump),
79 .sv_imgact_try = NULL,
80 .sv_minsigstksz = MINSIGSTKSZ,
81 .sv_pagesize = PAGE_SIZE,
82 .sv_minuser = VM_MIN_ADDRESS,
83 .sv_maxuser = VM_MAXUSER_ADDRESS,
84 .sv_usrstack = USRSTACK,
85 .sv_psstrings = PS_STRINGS,
86 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
87 .sv_copyout_strings = exec_copyout_strings,
88 .sv_setregs = exec_setregs,
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
105 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY,
106 (sysinit_cfunc_t) elf64_insert_brand_entry,
107 &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
121 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
122 (sysinit_cfunc_t) elf64_insert_brand_entry,
123 &freebsd_brand_oinfo);
127 elf64_dump_thread(struct thread *td __unused, void *dst __unused,
128 size_t *off __unused)
134 * The following table holds for each relocation type:
135 * - the width in bits of the memory location the relocation
136 * applies to (not currently used)
137 * - the number of bits the relocation value must be shifted to the
138 * right (i.e. discard least significant bits) to fit into
139 * the appropriate field in the instruction word.
140 * - flags indicating whether
141 * * the relocation involves a symbol
142 * * the relocation is relative to the current position
143 * * the relocation is for a GOT entry
144 * * the relocation is relative to the load address
147 #define _RF_S 0x80000000 /* Resolve symbol */
148 #define _RF_A 0x40000000 /* Use addend */
149 #define _RF_P 0x20000000 /* Location relative */
150 #define _RF_G 0x10000000 /* GOT offset */
151 #define _RF_B 0x08000000 /* Load address relative */
152 #define _RF_U 0x04000000 /* Unaligned */
153 #define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */
154 #define _RF_RS(s) ( (s) & 0xff) /* right shift */
155 static const int reloc_target_flags[] = {
157 _RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* RELOC_8 */
158 _RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* RELOC_16 */
159 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* RELOC_32 */
160 _RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */
161 _RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */
162 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */
163 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */
164 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */
165 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* HI22 */
166 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 22 */
167 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 13 */
168 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LO10 */
169 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */
170 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */
171 _RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */
172 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */
173 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */
174 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */
175 _RF_SZ(32) | _RF_RS(0), /* COPY */
176 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */
177 _RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */
178 _RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */
179 _RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */
181 _RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */
182 _RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */
183 _RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */
184 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */
185 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */
186 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */
187 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 10 */
188 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 11 */
189 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* 64 */
190 _RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */
191 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(42), /* HH22 */
192 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(32), /* HM10 */
193 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LM22 */
194 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */
195 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */
196 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */
197 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */
198 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */
199 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */
200 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 7 */
201 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 5 */
202 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 6 */
203 _RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */
204 _RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */
205 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* HIX22 */
206 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LOX10 */
207 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(22), /* H44 */
208 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(12), /* M44 */
209 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* L44 */
210 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */
211 _RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */
212 _RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */
216 static const char *reloc_names[] = {
217 "NONE", "RELOC_8", "RELOC_16", "RELOC_32", "DISP_8",
218 "DISP_16", "DISP_32", "WDISP_30", "WDISP_22", "HI22",
219 "22", "13", "LO10", "GOT10", "GOT13",
220 "GOT22", "PC10", "PC22", "WPLT30", "COPY",
221 "GLOB_DAT", "JMP_SLOT", "RELATIVE", "UA_32", "PLT32",
222 "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22", "PCPLT32",
223 "10", "11", "64", "OLO10", "HH22",
224 "HM10", "LM22", "PC_HH22", "PC_HM10", "PC_LM22",
225 "WDISP16", "WDISP19", "GLOB_JMP", "7", "5", "6",
226 "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44",
227 "L44", "REGISTER", "UA64", "UA16"
231 #define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0)
232 #define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0)
233 #define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0)
234 #define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0)
235 #define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0)
236 #define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff)
237 #define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff)
239 static const long reloc_target_bitmask[] = {
240 #define _BM(x) (~(-(1ULL << (x))))
242 _BM(8), _BM(16), _BM(32), /* RELOC_8, _16, _32 */
243 _BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */
244 _BM(30), _BM(22), /* WDISP30, WDISP22 */
245 _BM(22), _BM(22), /* HI22, _22 */
246 _BM(13), _BM(10), /* RELOC_13, _LO10 */
247 _BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */
248 _BM(10), _BM(22), /* _PC10, _PC22 */
249 _BM(30), 0, /* _WPLT30, _COPY */
250 _BM(32), _BM(32), _BM(32), /* _GLOB_DAT, JMP_SLOT, _RELATIVE */
251 _BM(32), _BM(32), /* _UA32, PLT32 */
252 _BM(22), _BM(10), /* _HIPLT22, LOPLT10 */
253 _BM(32), _BM(22), _BM(10), /* _PCPLT32, _PCPLT22, _PCPLT10 */
254 _BM(10), _BM(11), -1, /* _10, _11, _64 */
255 _BM(13), _BM(22), /* _OLO10, _HH22 */
256 _BM(10), _BM(22), /* _HM10, _LM22 */
257 _BM(22), _BM(10), _BM(22), /* _PC_HH22, _PC_HM10, _PC_LM22 */
258 _BM(16), _BM(19), /* _WDISP16, _WDISP19 */
260 _BM(7), _BM(5), _BM(6) /* _7, _5, _6 */
261 -1, -1, /* DISP64, PLT64 */
262 _BM(22), _BM(13), /* HIX22, LOX10 */
263 _BM(22), _BM(10), _BM(13), /* H44, M44, L44 */
264 -1, -1, _BM(16), /* REGISTER, UA64, UA16 */
267 #define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t])
270 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
271 int type, elf_lookup_fn lookup)
273 const Elf_Rela *rela;
277 if (type != ELF_RELOC_RELA)
280 rela = (const Elf_Rela *)data;
281 if (ELF64_R_TYPE_ID(rela->r_info) != R_SPARC_RELATIVE)
284 value = rela->r_addend + (Elf_Addr)lf->address;
285 where = (Elf_Addr *)((Elf_Addr)lf->address + rela->r_offset);
292 /* Process one elf relocation with addend. */
294 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
295 elf_lookup_fn lookup)
297 const Elf_Rela *rela;
300 Elf_Size rtype, symidx;
305 if (type != ELF_RELOC_RELA)
308 rela = (const Elf_Rela *)data;
309 where = (Elf_Addr *)(relocbase + rela->r_offset);
310 where32 = (Elf_Word *)where;
311 rtype = ELF64_R_TYPE_ID(rela->r_info);
312 symidx = ELF_R_SYM(rela->r_info);
314 if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE)
317 if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY ||
318 rtype >= sizeof(reloc_target_bitmask) /
319 sizeof(*reloc_target_bitmask))
322 if (RELOC_UNALIGNED(rtype))
325 value = rela->r_addend;
327 if (RELOC_RESOLVE_SYMBOL(rtype)) {
328 addr = lookup(lf, symidx, 1);
334 if (rtype == R_SPARC_OLO10)
335 value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
337 if (RELOC_PC_RELATIVE(rtype))
338 value -= (Elf_Addr)where;
340 if (RELOC_BASE_RELATIVE(rtype))
343 mask = RELOC_VALUE_BITMASK(rtype);
344 value >>= RELOC_VALUE_RIGHTSHIFT(rtype);
347 if (RELOC_TARGET_SIZE(rtype) > 32) {
359 elf_cpu_load_file(linker_file_t lf __unused)
366 elf_cpu_unload_file(linker_file_t lf __unused)