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>
41 #include <sys/syscall.h>
42 #include <sys/signalvar.h>
43 #include <sys/vnode.h>
44 #include <sys/linker.h>
47 #include <vm/vm_param.h>
49 #include <machine/altivec.h>
50 #include <machine/cpu.h>
51 #include <machine/fpu.h>
52 #include <machine/elf.h>
53 #include <machine/md_var.h>
55 static void exec_setregs_funcdesc(struct thread *td, struct image_params *imgp,
58 struct sysentvec elf64_freebsd_sysvec_v1 = {
59 .sv_size = SYS_MAXSYSCALL,
65 .sv_fixup = __elfN(freebsd_fixup),
66 .sv_sendsig = sendsig,
67 .sv_sigcode = sigcode64,
68 .sv_szsigcode = &szsigcode64,
69 .sv_name = "FreeBSD ELF64",
70 .sv_coredump = __elfN(coredump),
71 .sv_imgact_try = NULL,
72 .sv_minsigstksz = MINSIGSTKSZ,
73 .sv_pagesize = PAGE_SIZE,
74 .sv_minuser = VM_MIN_ADDRESS,
75 .sv_maxuser = VM_MAXUSER_ADDRESS,
76 .sv_usrstack = USRSTACK,
77 .sv_psstrings = PS_STRINGS,
78 .sv_stackprot = VM_PROT_ALL,
79 .sv_copyout_strings = exec_copyout_strings,
80 .sv_setregs = exec_setregs_funcdesc,
83 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
84 .sv_set_syscall_retval = cpu_set_syscall_retval,
85 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
86 .sv_syscallnames = syscallnames,
87 .sv_shared_page_base = SHAREDPAGE,
88 .sv_shared_page_len = PAGE_SIZE,
90 .sv_thread_detach = NULL,
92 .sv_hwcap = &cpu_features,
93 .sv_hwcap2 = &cpu_features2,
95 INIT_SYSENTVEC(elf64_sysvec_v1, &elf64_freebsd_sysvec_v1);
97 struct sysentvec elf64_freebsd_sysvec_v2 = {
98 .sv_size = SYS_MAXSYSCALL,
103 .sv_transtrap = NULL,
104 .sv_fixup = __elfN(freebsd_fixup),
105 .sv_sendsig = sendsig,
106 .sv_sigcode = sigcode64_elfv2,
107 .sv_szsigcode = &szsigcode64_elfv2,
108 .sv_name = "FreeBSD ELF64 V2",
109 .sv_coredump = __elfN(coredump),
110 .sv_imgact_try = NULL,
111 .sv_minsigstksz = MINSIGSTKSZ,
112 .sv_pagesize = PAGE_SIZE,
113 .sv_minuser = VM_MIN_ADDRESS,
114 .sv_maxuser = VM_MAXUSER_ADDRESS,
115 .sv_usrstack = USRSTACK,
116 .sv_psstrings = PS_STRINGS,
117 .sv_stackprot = VM_PROT_ALL,
118 .sv_copyout_strings = exec_copyout_strings,
119 .sv_setregs = exec_setregs,
122 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP,
123 .sv_set_syscall_retval = cpu_set_syscall_retval,
124 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
125 .sv_syscallnames = syscallnames,
126 .sv_shared_page_base = SHAREDPAGE,
127 .sv_shared_page_len = PAGE_SIZE,
128 .sv_schedtail = NULL,
129 .sv_thread_detach = NULL,
131 INIT_SYSENTVEC(elf64_sysvec_v2, &elf64_freebsd_sysvec_v2);
133 static boolean_t ppc64_elfv1_header_match(struct image_params *params);
134 static boolean_t ppc64_elfv2_header_match(struct image_params *params);
136 static Elf64_Brandinfo freebsd_brand_info_elfv1 = {
137 .brand = ELFOSABI_FREEBSD,
139 .compat_3_brand = "FreeBSD",
141 .interp_path = "/libexec/ld-elf.so.1",
142 .sysvec = &elf64_freebsd_sysvec_v1,
143 .interp_newpath = NULL,
144 .brand_note = &elf64_freebsd_brandnote,
145 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
146 .header_supported = &ppc64_elfv1_header_match
149 SYSINIT(elf64v1, SI_SUB_EXEC, SI_ORDER_ANY,
150 (sysinit_cfunc_t) elf64_insert_brand_entry,
151 &freebsd_brand_info_elfv1);
153 static Elf64_Brandinfo freebsd_brand_info_elfv2 = {
154 .brand = ELFOSABI_FREEBSD,
156 .compat_3_brand = "FreeBSD",
158 .interp_path = "/libexec/ld-elf.so.1",
159 .sysvec = &elf64_freebsd_sysvec_v2,
160 .interp_newpath = NULL,
161 .brand_note = &elf64_freebsd_brandnote,
162 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
163 .header_supported = &ppc64_elfv2_header_match
166 SYSINIT(elf64v2, SI_SUB_EXEC, SI_ORDER_ANY,
167 (sysinit_cfunc_t) elf64_insert_brand_entry,
168 &freebsd_brand_info_elfv2);
170 static Elf64_Brandinfo freebsd_brand_oinfo = {
171 .brand = ELFOSABI_FREEBSD,
173 .compat_3_brand = "FreeBSD",
175 .interp_path = "/usr/libexec/ld-elf.so.1",
176 .sysvec = &elf64_freebsd_sysvec_v1,
177 .interp_newpath = NULL,
178 .brand_note = &elf64_freebsd_brandnote,
179 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
180 .header_supported = &ppc64_elfv1_header_match
183 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
184 (sysinit_cfunc_t) elf64_insert_brand_entry,
185 &freebsd_brand_oinfo);
187 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
190 ppc64_elfv1_header_match(struct image_params *params)
192 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
193 int abi = (hdr->e_flags & 3);
195 return (abi == 0 || abi == 1);
199 ppc64_elfv2_header_match(struct image_params *params)
201 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
202 int abi = (hdr->e_flags & 3);
208 exec_setregs_funcdesc(struct thread *td, struct image_params *imgp,
211 struct trapframe *tf;
212 register_t entry_desc[3];
215 exec_setregs(td, imgp, stack);
218 * For 64-bit ELFv1, we need to disentangle the function
223 * 2. Environment pointer (r11)
226 (void)copyin((void *)imgp->entry_addr, entry_desc,
228 tf->srr0 = entry_desc[0] + imgp->reloc_base;
229 tf->fixreg[2] = entry_desc[1] + imgp->reloc_base;
230 tf->fixreg[11] = entry_desc[2] + imgp->reloc_base;
234 elf64_dump_thread(struct thread *td, void *dst, size_t *off)
245 if (pcb->pcb_flags & PCB_VEC) {
248 len += elf64_populate_note(NT_PPC_VMX,
249 &pcb->pcb_vec, (char *)dst + len,
250 sizeof(pcb->pcb_vec), NULL);
252 len += elf64_populate_note(NT_PPC_VMX, NULL, NULL,
253 sizeof(pcb->pcb_vec), NULL);
256 if (pcb->pcb_flags & PCB_VSX) {
260 * Doubleword 0 of VSR0-VSR31 overlap with FPR0-FPR31 and
261 * VSR32-VSR63 overlap with VR0-VR31, so we only copy
262 * the non-overlapping data, which is doubleword 1 of VSR0-VSR31.
264 for (vsr_idx = 0; vsr_idx < nitems(vshr); vsr_idx++) {
265 vsr_dw1 = (uint64_t *)&pcb->pcb_fpu.fpr[vsr_idx].vsr[2];
266 vshr[vsr_idx] = *vsr_dw1;
268 len += elf64_populate_note(NT_PPC_VSX,
269 vshr, (char *)dst + len,
272 len += elf64_populate_note(NT_PPC_VSX, NULL, NULL,
280 /* Process one elf relocation with addend. */
282 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
283 int type, int local, elf_lookup_fn lookup)
288 Elf_Word rtype, symidx;
289 const Elf_Rela *rela;
294 panic("PPC only supports RELA relocations");
297 rela = (const Elf_Rela *)data;
298 where = (Elf_Addr *) (relocbase + rela->r_offset);
299 addend = rela->r_addend;
300 rtype = ELF_R_TYPE(rela->r_info);
301 symidx = ELF_R_SYM(rela->r_info);
304 panic("elf_reloc: unknown relocation mode %d\n", type);
312 case R_PPC64_ADDR64: /* doubleword64 S + A */
313 error = lookup(lf, symidx, 1, &addr);
320 case R_PPC_RELATIVE: /* doubleword64 B + A */
321 *where = elf_relocaddr(lf, relocbase + addend);
324 case R_PPC_JMP_SLOT: /* function descriptor copy */
325 lookup(lf, symidx, 1, &addr);
326 #if !defined(_CALL_ELF) || _CALL_ELF == 1
327 memcpy(where, (Elf_Addr *)addr, 3*sizeof(Elf_Addr));
329 memcpy(where, (Elf_Addr *)addr, sizeof(Elf_Addr));
331 __asm __volatile("dcbst 0,%0; sync" :: "r"(where) : "memory");
335 printf("kldload: unexpected relocation type %d\n",
343 elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase)
345 Elf_Rela *rela = NULL, *relalim;
350 * Extract the rela/relasz values from the dynamic section
352 for (; dynp->d_tag != DT_NULL; dynp++) {
353 switch (dynp->d_tag) {
355 rela = (Elf_Rela *)(relocbase+dynp->d_un.d_ptr);
358 relasz = dynp->d_un.d_val;
364 * Relocate these values
366 relalim = (Elf_Rela *)((caddr_t)rela + relasz);
367 for (; rela < relalim; rela++) {
368 if (ELF_R_TYPE(rela->r_info) != R_PPC_RELATIVE)
370 where = (Elf_Addr *)(relocbase + rela->r_offset);
371 *where = (Elf_Addr)(relocbase + rela->r_addend);
376 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
377 elf_lookup_fn lookup)
380 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
384 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
385 int type, elf_lookup_fn lookup)
388 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
392 elf_cpu_load_file(linker_file_t lf)
394 /* Only sync the cache for non-kernel modules */
396 __syncicache(lf->address, lf->size);
401 elf_cpu_unload_file(linker_file_t lf __unused)