2 * Copyright 1996-1998 John D. Polstra.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/param.h>
29 #include <sys/kernel.h>
30 #include <sys/systm.h>
32 #define __ELF_WORD_SIZE 32
35 #include <sys/imgact.h>
36 #include <sys/malloc.h>
38 #include <sys/namei.h>
39 #include <sys/fcntl.h>
40 #include <sys/sysent.h>
41 #include <sys/imgact_elf.h>
42 #include <sys/syscall.h>
43 #include <sys/signalvar.h>
44 #include <sys/vnode.h>
45 #include <sys/linker.h>
48 #include <vm/vm_param.h>
50 #include <machine/altivec.h>
51 #include <machine/cpu.h>
52 #include <machine/elf.h>
53 #include <machine/reg.h>
54 #include <machine/md_var.h>
57 #include <compat/freebsd32/freebsd32_proto.h>
58 #include <compat/freebsd32/freebsd32_util.h>
60 extern const char *freebsd32_syscallnames[];
63 struct sysentvec elf32_freebsd_sysvec = {
64 .sv_size = SYS_MAXSYSCALL,
66 .sv_table = freebsd32_sysent,
74 .sv_fixup = __elfN(freebsd_fixup),
75 .sv_sendsig = sendsig,
76 .sv_sigcode = sigcode32,
77 .sv_szsigcode = &szsigcode32,
78 .sv_name = "FreeBSD ELF32",
79 .sv_coredump = __elfN(coredump),
80 .sv_imgact_try = NULL,
81 .sv_minsigstksz = MINSIGSTKSZ,
82 .sv_pagesize = PAGE_SIZE,
83 .sv_minuser = VM_MIN_ADDRESS,
84 .sv_stackprot = VM_PROT_ALL,
86 .sv_maxuser = VM_MAXUSER_ADDRESS,
87 .sv_usrstack = FREEBSD32_USRSTACK,
88 .sv_psstrings = FREEBSD32_PS_STRINGS,
89 .sv_copyout_strings = freebsd32_copyout_strings,
90 .sv_setregs = ppc32_setregs,
91 .sv_syscallnames = freebsd32_syscallnames,
93 .sv_maxuser = VM_MAXUSER_ADDRESS,
94 .sv_usrstack = USRSTACK,
95 .sv_psstrings = PS_STRINGS,
96 .sv_copyout_strings = exec_copyout_strings,
97 .sv_setregs = exec_setregs,
98 .sv_syscallnames = syscallnames,
102 .sv_flags = SV_ABI_FREEBSD | SV_ILP32 | SV_SHP,
103 .sv_set_syscall_retval = cpu_set_syscall_retval,
104 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
105 .sv_shared_page_base = FREEBSD32_SHAREDPAGE,
106 .sv_shared_page_len = PAGE_SIZE,
107 .sv_schedtail = NULL,
108 .sv_thread_detach = NULL,
110 INIT_SYSENTVEC(elf32_sysvec, &elf32_freebsd_sysvec);
112 static Elf32_Brandinfo freebsd_brand_info = {
113 .brand = ELFOSABI_FREEBSD,
115 .compat_3_brand = "FreeBSD",
117 .interp_path = "/libexec/ld-elf.so.1",
118 .sysvec = &elf32_freebsd_sysvec,
120 .interp_newpath = "/libexec/ld-elf32.so.1",
122 .interp_newpath = NULL,
124 .brand_note = &elf32_freebsd_brandnote,
125 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
128 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
129 (sysinit_cfunc_t) elf32_insert_brand_entry,
130 &freebsd_brand_info);
132 static Elf32_Brandinfo freebsd_brand_oinfo = {
133 .brand = ELFOSABI_FREEBSD,
135 .compat_3_brand = "FreeBSD",
137 .interp_path = "/usr/libexec/ld-elf.so.1",
138 .sysvec = &elf32_freebsd_sysvec,
139 .interp_newpath = NULL,
140 .brand_note = &elf32_freebsd_brandnote,
141 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
144 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
145 (sysinit_cfunc_t) elf32_insert_brand_entry,
146 &freebsd_brand_oinfo);
148 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
151 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
158 if (pcb->pcb_flags & PCB_VEC) {
161 len += elf32_populate_note(NT_PPC_VMX,
163 sizeof(pcb->pcb_vec), NULL);
165 len += elf32_populate_note(NT_PPC_VMX, NULL, NULL,
166 sizeof(pcb->pcb_vec), NULL);
171 #ifndef __powerpc64__
172 /* Process one elf relocation with addend. */
174 elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
175 int type, int local, elf_lookup_fn lookup)
181 Elf_Word rtype, symidx;
182 const Elf_Rela *rela;
187 panic("PPC only supports RELA relocations");
190 rela = (const Elf_Rela *)data;
191 where = (Elf_Addr *) ((uintptr_t)relocbase + rela->r_offset);
192 hwhere = (Elf_Half *) ((uintptr_t)relocbase + rela->r_offset);
193 addend = rela->r_addend;
194 rtype = ELF_R_TYPE(rela->r_info);
195 symidx = ELF_R_SYM(rela->r_info);
198 panic("elf_reloc: unknown relocation mode %d\n", type);
206 case R_PPC_ADDR32: /* word32 S + A */
207 error = lookup(lf, symidx, 1, &addr);
210 *where = elf_relocaddr(lf, addr + addend);
213 case R_PPC_ADDR16_LO: /* #lo(S) */
214 error = lookup(lf, symidx, 1, &addr);
218 * addend values are sometimes relative to sections
219 * (i.e. .rodata) in rela, where in reality they
220 * are relative to relocbase. Detect this condition.
222 if (addr > relocbase && addr <= (relocbase + addend))
224 addr = elf_relocaddr(lf, addr + addend);
225 *hwhere = addr & 0xffff;
228 case R_PPC_ADDR16_HA: /* #ha(S) */
229 error = lookup(lf, symidx, 1, &addr);
233 * addend values are sometimes relative to sections
234 * (i.e. .rodata) in rela, where in reality they
235 * are relative to relocbase. Detect this condition.
237 if (addr > relocbase && addr <= (relocbase + addend))
239 addr = elf_relocaddr(lf, addr + addend);
240 *hwhere = ((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
244 case R_PPC_RELATIVE: /* word32 B + A */
245 *where = elf_relocaddr(lf, relocbase + addend);
249 printf("kldload: unexpected relocation type %d\n",
257 elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase)
259 Elf_Rela *rela = 0, *relalim;
264 * Extract the rela/relasz values from the dynamic section
266 for (; dynp->d_tag != DT_NULL; dynp++) {
267 switch (dynp->d_tag) {
269 rela = (Elf_Rela *)(relocbase+dynp->d_un.d_ptr);
272 relasz = dynp->d_un.d_val;
278 * Relocate these values
280 relalim = (Elf_Rela *)((caddr_t)rela + relasz);
281 for (; rela < relalim; rela++) {
282 if (ELF_R_TYPE(rela->r_info) != R_PPC_RELATIVE)
284 where = (Elf_Addr *)(relocbase + rela->r_offset);
285 *where = (Elf_Addr)(relocbase + rela->r_addend);
290 elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
291 elf_lookup_fn lookup)
294 return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup));
298 elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
299 int type, elf_lookup_fn lookup)
302 return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup));
306 elf_cpu_load_file(linker_file_t lf)
308 /* Only sync the cache for non-kernel modules */
310 __syncicache(lf->address, lf->size);
315 elf_cpu_unload_file(linker_file_t lf __unused)