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,
66 .sv_fixup = __elfN(freebsd_fixup),
67 .sv_sendsig = sendsig,
68 .sv_sigcode = sigcode64,
69 .sv_szsigcode = &szsigcode64,
70 .sv_name = "FreeBSD ELF64",
71 .sv_coredump = __elfN(coredump),
72 .sv_imgact_try = NULL,
73 .sv_minsigstksz = MINSIGSTKSZ,
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_auxargs = __elfN(powerpc_copyout_auxargs),
80 .sv_copyout_strings = exec_copyout_strings,
81 .sv_setregs = exec_setregs_funcdesc,
84 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP | SV_ASLR |
85 SV_TIMEKEEP | SV_RNG_SEED_VER,
86 .sv_set_syscall_retval = cpu_set_syscall_retval,
87 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
88 .sv_syscallnames = syscallnames,
89 .sv_shared_page_base = SHAREDPAGE,
90 .sv_shared_page_len = PAGE_SIZE,
92 .sv_thread_detach = NULL,
94 .sv_hwcap = &cpu_features,
95 .sv_hwcap2 = &cpu_features2,
98 struct sysentvec elf64_freebsd_sysvec_v2 = {
99 .sv_size = SYS_MAXSYSCALL,
101 .sv_transtrap = NULL,
102 .sv_fixup = __elfN(freebsd_fixup),
103 .sv_sendsig = sendsig,
104 .sv_sigcode = sigcode64, /* Fixed up in ppc64_init_sysvecs(). */
105 .sv_szsigcode = &szsigcode64,
106 .sv_name = "FreeBSD ELF64 V2",
107 .sv_coredump = __elfN(coredump),
108 .sv_imgact_try = NULL,
109 .sv_minsigstksz = MINSIGSTKSZ,
110 .sv_minuser = VM_MIN_ADDRESS,
111 .sv_maxuser = VM_MAXUSER_ADDRESS,
112 .sv_usrstack = USRSTACK,
113 .sv_psstrings = PS_STRINGS,
114 .sv_stackprot = VM_PROT_ALL,
115 .sv_copyout_auxargs = __elfN(powerpc_copyout_auxargs),
116 .sv_copyout_strings = exec_copyout_strings,
117 .sv_setregs = exec_setregs,
120 .sv_flags = SV_ABI_FREEBSD | SV_LP64 | SV_SHP |
121 SV_TIMEKEEP | SV_RNG_SEED_VER,
122 .sv_set_syscall_retval = cpu_set_syscall_retval,
123 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
124 .sv_syscallnames = syscallnames,
125 .sv_shared_page_base = SHAREDPAGE,
126 .sv_shared_page_len = PAGE_SIZE,
127 .sv_schedtail = NULL,
128 .sv_thread_detach = NULL,
130 .sv_hwcap = &cpu_features,
131 .sv_hwcap2 = &cpu_features2,
134 static boolean_t ppc64_elfv1_header_match(struct image_params *params,
135 int32_t *, uint32_t *);
136 static boolean_t ppc64_elfv2_header_match(struct image_params *params,
137 int32_t *, uint32_t *);
139 static Elf64_Brandinfo freebsd_brand_info_elfv1 = {
140 .brand = ELFOSABI_FREEBSD,
142 .compat_3_brand = "FreeBSD",
144 .interp_path = "/libexec/ld-elf.so.1",
145 .sysvec = &elf64_freebsd_sysvec_v1,
146 .interp_newpath = NULL,
147 .brand_note = &elf64_freebsd_brandnote,
148 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
149 .header_supported = &ppc64_elfv1_header_match
152 SYSINIT(elf64v1, SI_SUB_EXEC, SI_ORDER_ANY,
153 (sysinit_cfunc_t) elf64_insert_brand_entry,
154 &freebsd_brand_info_elfv1);
156 static Elf64_Brandinfo freebsd_brand_info_elfv2 = {
157 .brand = ELFOSABI_FREEBSD,
159 .compat_3_brand = "FreeBSD",
161 .interp_path = "/libexec/ld-elf.so.1",
162 .sysvec = &elf64_freebsd_sysvec_v2,
163 .interp_newpath = NULL,
164 .brand_note = &elf64_freebsd_brandnote,
165 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
166 .header_supported = &ppc64_elfv2_header_match
169 SYSINIT(elf64v2, SI_SUB_EXEC, SI_ORDER_ANY,
170 (sysinit_cfunc_t) elf64_insert_brand_entry,
171 &freebsd_brand_info_elfv2);
173 static Elf64_Brandinfo freebsd_brand_oinfo = {
174 .brand = ELFOSABI_FREEBSD,
176 .compat_3_brand = "FreeBSD",
178 .interp_path = "/usr/libexec/ld-elf.so.1",
179 .sysvec = &elf64_freebsd_sysvec_v1,
180 .interp_newpath = NULL,
181 .brand_note = &elf64_freebsd_brandnote,
182 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE,
183 .header_supported = &ppc64_elfv1_header_match
186 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
187 (sysinit_cfunc_t) elf64_insert_brand_entry,
188 &freebsd_brand_oinfo);
190 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
193 ppc64_init_sysvecs(void *arg)
195 exec_sysvec_init(&elf64_freebsd_sysvec_v2);
196 exec_sysvec_init_secondary(&elf64_freebsd_sysvec_v2,
197 &elf64_freebsd_sysvec_v1);
199 * Adjust elfv2 sigcode after elfv1 sysvec is initialized.
200 * exec_sysvec_init_secondary() assumes secondary sysvecs use
201 * identical signal code, and skips allocating a second copy.
202 * Since the ELFv2 trampoline is a strict subset of the ELFv1 code,
203 * we can work around this by adjusting the base address. This also
204 * avoids two copies of the trampoline code being allocated!
206 elf64_freebsd_sysvec_v2.sv_sigcode_base +=
207 (uintptr_t)sigcode64_elfv2 - (uintptr_t)&sigcode64;
208 elf64_freebsd_sysvec_v2.sv_szsigcode = &szsigcode64_elfv2;
210 SYSINIT(elf64_sysvec, SI_SUB_EXEC, SI_ORDER_ANY, ppc64_init_sysvecs, NULL);
213 ppc64_elfv1_header_match(struct image_params *params, int32_t *osrel __unused,
214 uint32_t *fctl0 __unused)
216 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
217 int abi = (hdr->e_flags & 3);
219 return (abi == 0 || abi == 1);
223 ppc64_elfv2_header_match(struct image_params *params, int32_t *osrel __unused,
224 uint32_t *fctl0 __unused)
226 const Elf64_Ehdr *hdr = (const Elf64_Ehdr *)params->image_header;
227 int abi = (hdr->e_flags & 3);
233 exec_setregs_funcdesc(struct thread *td, struct image_params *imgp,
236 struct trapframe *tf;
237 register_t entry_desc[3];
240 exec_setregs(td, imgp, stack);
243 * For 64-bit ELFv1, we need to disentangle the function
248 * 2. Environment pointer (r11)
251 (void)copyin((void *)imgp->entry_addr, entry_desc,
253 tf->srr0 = entry_desc[0] + imgp->reloc_base;
254 tf->fixreg[2] = entry_desc[1] + imgp->reloc_base;
255 tf->fixreg[11] = entry_desc[2] + imgp->reloc_base;
259 elf64_dump_thread(struct thread *td, void *dst, size_t *off)
270 if (pcb->pcb_flags & PCB_VEC) {
273 len += elf64_populate_note(NT_PPC_VMX,
274 &pcb->pcb_vec, (char *)dst + len,
275 sizeof(pcb->pcb_vec), NULL);
277 len += elf64_populate_note(NT_PPC_VMX, NULL, NULL,
278 sizeof(pcb->pcb_vec), NULL);
281 if (pcb->pcb_flags & PCB_VSX) {
285 * Doubleword 0 of VSR0-VSR31 overlap with FPR0-FPR31 and
286 * VSR32-VSR63 overlap with VR0-VR31, so we only copy
287 * the non-overlapping data, which is doubleword 1 of VSR0-VSR31.
289 for (vsr_idx = 0; vsr_idx < nitems(vshr); vsr_idx++) {
290 vsr_dw1 = (uint64_t *)&pcb->pcb_fpu.fpr[vsr_idx].vsr[2];
291 vshr[vsr_idx] = *vsr_dw1;
293 len += elf64_populate_note(NT_PPC_VSX,
294 vshr, (char *)dst + len,
297 len += elf64_populate_note(NT_PPC_VSX, NULL, NULL,
305 elf_is_ifunc_reloc(Elf_Size r_info)
308 return (ELF_R_TYPE(r_info) == R_PPC_IRELATIVE);
311 /* Process one elf relocation with addend. */
313 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
314 int type, int local, elf_lookup_fn lookup)
318 Elf_Addr addend, val;
319 Elf_Word rtype, symidx;
320 const Elf_Rela *rela;
325 panic("PPC only supports RELA relocations");
328 rela = (const Elf_Rela *)data;
329 where = (Elf_Addr *) (relocbase + rela->r_offset);
330 addend = rela->r_addend;
331 rtype = ELF_R_TYPE(rela->r_info);
332 symidx = ELF_R_SYM(rela->r_info);
335 panic("elf_reloc: unknown relocation mode %d\n", type);
342 case R_PPC64_ADDR64: /* doubleword64 S + A */
343 error = lookup(lf, symidx, 1, &addr);
350 case R_PPC_RELATIVE: /* doubleword64 B + A */
351 *where = elf_relocaddr(lf, relocbase + addend);
354 case R_PPC_JMP_SLOT: /* function descriptor copy */
355 lookup(lf, symidx, 1, &addr);
356 #if !defined(_CALL_ELF) || _CALL_ELF == 1
357 memcpy(where, (Elf_Addr *)addr, 3*sizeof(Elf_Addr));
361 __asm __volatile("dcbst 0,%0; sync" :: "r"(where) : "memory");
364 case R_PPC_IRELATIVE:
365 addr = relocbase + addend;
366 val = ((Elf64_Addr (*)(void))addr)();
372 printf("kldload: unexpected relocation type %d, "
373 "symbol index %d\n", (int)rtype, symidx);
380 elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase)
382 Elf_Rela *rela = NULL, *relalim;
387 * Extract the rela/relasz values from the dynamic section
389 for (; dynp->d_tag != DT_NULL; dynp++) {
390 switch (dynp->d_tag) {
392 rela = (Elf_Rela *)(relocbase+dynp->d_un.d_ptr);
395 relasz = dynp->d_un.d_val;
401 * Relocate these values
403 relalim = (Elf_Rela *)((caddr_t)rela + relasz);
404 for (; rela < relalim; rela++) {
405 if (ELF_R_TYPE(rela->r_info) != R_PPC_RELATIVE)
407 where = (Elf_Addr *)(relocbase + rela->r_offset);
408 *where = (Elf_Addr)(relocbase + rela->r_addend);
413 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
414 elf_lookup_fn lookup)
417 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
421 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
422 int type, elf_lookup_fn lookup)
425 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
429 elf_cpu_load_file(linker_file_t lf)
431 /* Only sync the cache for non-kernel modules */
433 __syncicache(lf->address, lf->size);
438 elf_cpu_unload_file(linker_file_t lf __unused)
445 elf_cpu_parse_dynamic(caddr_t loadbase __unused, Elf_Dyn *dynamic __unused)