2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 1996-1998 John D. Polstra.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/systm.h>
34 #include <sys/imgact.h>
35 #include <sys/malloc.h>
37 #include <sys/namei.h>
38 #include <sys/fcntl.h>
39 #include <sys/sysent.h>
40 #include <sys/imgact_elf.h>
43 #include <sys/syscall.h>
44 #include <sys/signalvar.h>
45 #include <sys/vnode.h>
46 #include <sys/linker.h>
49 #include <vm/vm_param.h>
51 #include <machine/altivec.h>
52 #include <machine/cpu.h>
53 #include <machine/fpu.h>
54 #include <machine/elf.h>
55 #include <machine/md_var.h>
57 #include <powerpc/powerpc/elf_common.c>
59 static void exec_setregs_funcdesc(struct thread *td, struct image_params *imgp,
62 struct sysentvec elf64_freebsd_sysvec_v1 = {
63 .sv_size = SYS_MAXSYSCALL,
68 .sv_fixup = __elfN(freebsd_fixup),
69 .sv_sendsig = sendsig,
70 .sv_sigcode = sigcode64,
71 .sv_szsigcode = &szsigcode64,
72 .sv_name = "FreeBSD ELF64",
73 .sv_coredump = __elfN(coredump),
74 .sv_imgact_try = NULL,
75 .sv_minsigstksz = MINSIGSTKSZ,
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_ALL,
81 .sv_copyout_auxargs = __elfN(powerpc_copyout_auxargs),
82 .sv_copyout_strings = exec_copyout_strings,
83 .sv_setregs = exec_setregs_funcdesc,
86 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP | SV_ASLR,
87 .sv_set_syscall_retval = cpu_set_syscall_retval,
88 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
89 .sv_syscallnames = syscallnames,
90 .sv_shared_page_base = SHAREDPAGE,
91 .sv_shared_page_len = PAGE_SIZE,
93 .sv_thread_detach = NULL,
95 .sv_hwcap = &cpu_features,
96 .sv_hwcap2 = &cpu_features2,
98 INIT_SYSENTVEC(elf64_sysvec_v1, &elf64_freebsd_sysvec_v1);
100 struct sysentvec elf64_freebsd_sysvec_v2 = {
101 .sv_size = SYS_MAXSYSCALL,
105 .sv_transtrap = NULL,
106 .sv_fixup = __elfN(freebsd_fixup),
107 .sv_sendsig = sendsig,
108 .sv_sigcode = sigcode64_elfv2,
109 .sv_szsigcode = &szsigcode64_elfv2,
110 .sv_name = "FreeBSD ELF64 V2",
111 .sv_coredump = __elfN(coredump),
112 .sv_imgact_try = NULL,
113 .sv_minsigstksz = MINSIGSTKSZ,
114 .sv_minuser = VM_MIN_ADDRESS,
115 .sv_maxuser = VM_MAXUSER_ADDRESS,
116 .sv_usrstack = USRSTACK,
117 .sv_psstrings = PS_STRINGS,
118 .sv_stackprot = VM_PROT_ALL,
119 .sv_copyout_auxargs = __elfN(powerpc_copyout_auxargs),
120 .sv_copyout_strings = exec_copyout_strings,
121 .sv_setregs = exec_setregs,
124 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
125 .sv_set_syscall_retval = cpu_set_syscall_retval,
126 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
127 .sv_syscallnames = syscallnames,
128 .sv_shared_page_base = SHAREDPAGE,
129 .sv_shared_page_len = PAGE_SIZE,
130 .sv_schedtail = NULL,
131 .sv_thread_detach = NULL,
133 .sv_hwcap = &cpu_features,
134 .sv_hwcap2 = &cpu_features2,
136 INIT_SYSENTVEC(elf64_sysvec_v2, &elf64_freebsd_sysvec_v2);
138 static boolean_t ppc64_elfv1_header_match(struct image_params *params);
139 static boolean_t ppc64_elfv2_header_match(struct image_params *params);
141 static Elf64_Brandinfo freebsd_brand_info_elfv1 = {
142 .brand = ELFOSABI_FREEBSD,
144 .compat_3_brand = "FreeBSD",
146 .interp_path = "/libexec/ld-elf.so.1",
147 .sysvec = &elf64_freebsd_sysvec_v1,
148 .interp_newpath = NULL,
149 .brand_note = &elf64_freebsd_brandnote,
150 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
151 .header_supported = &ppc64_elfv1_header_match
154 SYSINIT(elf64v1, SI_SUB_EXEC, SI_ORDER_ANY,
155 (sysinit_cfunc_t) elf64_insert_brand_entry,
156 &freebsd_brand_info_elfv1);
158 static Elf64_Brandinfo freebsd_brand_info_elfv2 = {
159 .brand = ELFOSABI_FREEBSD,
161 .compat_3_brand = "FreeBSD",
163 .interp_path = "/libexec/ld-elf.so.1",
164 .sysvec = &elf64_freebsd_sysvec_v2,
165 .interp_newpath = NULL,
166 .brand_note = &elf64_freebsd_brandnote,
167 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
168 .header_supported = &ppc64_elfv2_header_match
171 SYSINIT(elf64v2, SI_SUB_EXEC, SI_ORDER_ANY,
172 (sysinit_cfunc_t) elf64_insert_brand_entry,
173 &freebsd_brand_info_elfv2);
175 static Elf64_Brandinfo freebsd_brand_oinfo = {
176 .brand = ELFOSABI_FREEBSD,
178 .compat_3_brand = "FreeBSD",
180 .interp_path = "/usr/libexec/ld-elf.so.1",
181 .sysvec = &elf64_freebsd_sysvec_v1,
182 .interp_newpath = NULL,
183 .brand_note = &elf64_freebsd_brandnote,
184 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
185 .header_supported = &ppc64_elfv1_header_match
188 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
189 (sysinit_cfunc_t) elf64_insert_brand_entry,
190 &freebsd_brand_oinfo);
192 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
195 ppc64_elfv1_header_match(struct image_params *params)
197 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
198 int abi = (hdr->e_flags & 3);
200 return (abi == 0 || abi == 1);
204 ppc64_elfv2_header_match(struct image_params *params)
206 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
207 int abi = (hdr->e_flags & 3);
213 exec_setregs_funcdesc(struct thread *td, struct image_params *imgp,
216 struct trapframe *tf;
217 register_t entry_desc[3];
220 exec_setregs(td, imgp, stack);
223 * For 64-bit ELFv1, we need to disentangle the function
228 * 2. Environment pointer (r11)
231 (void)copyin((void *)imgp->entry_addr, entry_desc,
233 tf->srr0 = entry_desc[0] + imgp->reloc_base;
234 tf->fixreg[2] = entry_desc[1] + imgp->reloc_base;
235 tf->fixreg[11] = entry_desc[2] + imgp->reloc_base;
239 elf64_dump_thread(struct thread *td, void *dst, size_t *off)
250 if (pcb->pcb_flags & PCB_VEC) {
253 len += elf64_populate_note(NT_PPC_VMX,
254 &pcb->pcb_vec, (char *)dst + len,
255 sizeof(pcb->pcb_vec), NULL);
257 len += elf64_populate_note(NT_PPC_VMX, NULL, NULL,
258 sizeof(pcb->pcb_vec), NULL);
261 if (pcb->pcb_flags & PCB_VSX) {
265 * Doubleword 0 of VSR0-VSR31 overlap with FPR0-FPR31 and
266 * VSR32-VSR63 overlap with VR0-VR31, so we only copy
267 * the non-overlapping data, which is doubleword 1 of VSR0-VSR31.
269 for (vsr_idx = 0; vsr_idx < nitems(vshr); vsr_idx++) {
270 vsr_dw1 = (uint64_t *)&pcb->pcb_fpu.fpr[vsr_idx].vsr[2];
271 vshr[vsr_idx] = *vsr_dw1;
273 len += elf64_populate_note(NT_PPC_VSX,
274 vshr, (char *)dst + len,
277 len += elf64_populate_note(NT_PPC_VSX, NULL, NULL,
285 elf_is_ifunc_reloc(Elf_Size r_info __unused)
291 /* Process one elf relocation with addend. */
293 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
294 int type, int local, elf_lookup_fn lookup)
299 Elf_Word rtype, symidx;
300 const Elf_Rela *rela;
305 panic("PPC only supports RELA relocations");
308 rela = (const Elf_Rela *)data;
309 where = (Elf_Addr *) (relocbase + rela->r_offset);
310 addend = rela->r_addend;
311 rtype = ELF_R_TYPE(rela->r_info);
312 symidx = ELF_R_SYM(rela->r_info);
315 panic("elf_reloc: unknown relocation mode %d\n", type);
323 case R_PPC64_ADDR64: /* doubleword64 S + A */
324 error = lookup(lf, symidx, 1, &addr);
331 case R_PPC_RELATIVE: /* doubleword64 B + A */
332 *where = elf_relocaddr(lf, relocbase + addend);
335 case R_PPC_JMP_SLOT: /* function descriptor copy */
336 lookup(lf, symidx, 1, &addr);
337 #if !defined(_CALL_ELF) || _CALL_ELF == 1
338 memcpy(where, (Elf_Addr *)addr, 3*sizeof(Elf_Addr));
342 __asm __volatile("dcbst 0,%0; sync" :: "r"(where) : "memory");
346 printf("kldload: unexpected relocation type %d\n",
354 elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase)
356 Elf_Rela *rela = NULL, *relalim;
361 * Extract the rela/relasz values from the dynamic section
363 for (; dynp->d_tag != DT_NULL; dynp++) {
364 switch (dynp->d_tag) {
366 rela = (Elf_Rela *)(relocbase+dynp->d_un.d_ptr);
369 relasz = dynp->d_un.d_val;
375 * Relocate these values
377 relalim = (Elf_Rela *)((caddr_t)rela + relasz);
378 for (; rela < relalim; rela++) {
379 if (ELF_R_TYPE(rela->r_info) != R_PPC_RELATIVE)
381 where = (Elf_Addr *)(relocbase + rela->r_offset);
382 *where = (Elf_Addr)(relocbase + rela->r_addend);
387 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
388 elf_lookup_fn lookup)
391 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
395 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
396 int type, elf_lookup_fn lookup)
399 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
403 elf_cpu_load_file(linker_file_t lf)
405 /* Only sync the cache for non-kernel modules */
407 __syncicache(lf->address, lf->size);
412 elf_cpu_unload_file(linker_file_t lf __unused)
419 elf_cpu_parse_dynamic(linker_file_t lf __unused, Elf_Dyn *dynamic __unused)