1129198Scognet/*- 2129198Scognet * Copyright 1996-1998 John D. Polstra. 3129198Scognet * All rights reserved. 4129198Scognet * 5129198Scognet * Redistribution and use in source and binary forms, with or without 6129198Scognet * modification, are permitted provided that the following conditions 7129198Scognet * are met: 8129198Scognet * 1. Redistributions of source code must retain the above copyright 9129198Scognet * notice, this list of conditions and the following disclaimer. 10129198Scognet * 2. Redistributions in binary form must reproduce the above copyright 11129198Scognet * notice, this list of conditions and the following disclaimer in the 12129198Scognet * documentation and/or other materials provided with the distribution. 13129198Scognet * 14129198Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15129198Scognet * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16129198Scognet * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17129198Scognet * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18129198Scognet * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19129198Scognet * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20129198Scognet * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21129198Scognet * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22129198Scognet * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23129198Scognet * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24129198Scognet */ 25129198Scognet 26129198Scognet#include <sys/cdefs.h> 27129198Scognet__FBSDID("$FreeBSD$"); 28129198Scognet 29129198Scognet#include <sys/param.h> 30129198Scognet#include <sys/kernel.h> 31129198Scognet#include <sys/systm.h> 32129198Scognet#include <sys/exec.h> 33129198Scognet#include <sys/imgact.h> 34129198Scognet#include <sys/linker.h> 35129198Scognet#include <sys/sysent.h> 36129198Scognet#include <sys/imgact_elf.h> 37208453Skib#include <sys/proc.h> 38129198Scognet#include <sys/syscall.h> 39129198Scognet#include <sys/signalvar.h> 40129198Scognet#include <sys/vnode.h> 41129198Scognet 42129198Scognet#include <vm/vm.h> 43129198Scognet#include <vm/pmap.h> 44129198Scognet#include <vm/vm_param.h> 45129198Scognet 46129198Scognet#include <machine/elf.h> 47129198Scognet#include <machine/md_var.h> 48129198Scognet 49129198Scognetstruct sysentvec elf32_freebsd_sysvec = { 50183322Skib .sv_size = SYS_MAXSYSCALL, 51183322Skib .sv_table = sysent, 52183322Skib .sv_mask = 0, 53183322Skib .sv_sigsize = 0, 54183322Skib .sv_sigtbl = NULL, 55183322Skib .sv_errsize = 0, 56183322Skib .sv_errtbl = NULL, 57183322Skib .sv_transtrap = NULL, 58183322Skib .sv_fixup = __elfN(freebsd_fixup), 59183322Skib .sv_sendsig = sendsig, 60183322Skib .sv_sigcode = sigcode, 61183322Skib .sv_szsigcode = &szsigcode, 62183322Skib .sv_prepsyscall = NULL, 63183322Skib .sv_name = "FreeBSD ELF32", 64183322Skib .sv_coredump = __elfN(coredump), 65183322Skib .sv_imgact_try = NULL, 66183322Skib .sv_minsigstksz = MINSIGSTKSZ, 67183322Skib .sv_pagesize = PAGE_SIZE, 68183322Skib .sv_minuser = VM_MIN_ADDRESS, 69183322Skib .sv_maxuser = VM_MAXUSER_ADDRESS, 70183322Skib .sv_usrstack = USRSTACK, 71183322Skib .sv_psstrings = PS_STRINGS, 72183322Skib .sv_stackprot = VM_PROT_ALL, 73183322Skib .sv_copyout_strings = exec_copyout_strings, 74183322Skib .sv_setregs = exec_setregs, 75183322Skib .sv_fixlimit = NULL, 76185169Skib .sv_maxssiz = NULL, 77208453Skib .sv_flags = SV_ABI_FREEBSD | SV_ILP32, 78208453Skib .sv_set_syscall_retval = cpu_set_syscall_retval, 79225973Skib .sv_fetch_syscall_args = cpu_fetch_syscall_args, 80208453Skib .sv_syscallnames = syscallnames, 81219405Sdchagin .sv_schedtail = NULL, 82293490Sdchagin .sv_thread_detach = NULL, 83294136Sdchagin .sv_trap = NULL, 84129198Scognet}; 85129198Scognet 86129198Scognetstatic Elf32_Brandinfo freebsd_brand_info = { 87183322Skib .brand = ELFOSABI_FREEBSD, 88183322Skib .machine = EM_ARM, 89183322Skib .compat_3_brand = "FreeBSD", 90183322Skib .emul_path = NULL, 91183322Skib .interp_path = "/libexec/ld-elf.so.1", 92183322Skib .sysvec = &elf32_freebsd_sysvec, 93183322Skib .interp_newpath = NULL, 94189771Sdchagin .brand_note = &elf32_freebsd_brandnote, 95190708Sdchagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 96183322Skib}; 97129198Scognet 98197729SbzSYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST, 99129198Scognet (sysinit_cfunc_t) elf32_insert_brand_entry, 100129198Scognet &freebsd_brand_info); 101129198Scognet 102129198Scognetstatic Elf32_Brandinfo freebsd_brand_oinfo = { 103183322Skib .brand = ELFOSABI_FREEBSD, 104183322Skib .machine = EM_ARM, 105183322Skib .compat_3_brand = "FreeBSD", 106183322Skib .emul_path = NULL, 107183322Skib .interp_path = "/usr/libexec/ld-elf.so.1", 108183322Skib .sysvec = &elf32_freebsd_sysvec, 109183322Skib .interp_newpath = NULL, 110189771Sdchagin .brand_note = &elf32_freebsd_brandnote, 111190708Sdchagin .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 112183322Skib}; 113129198Scognet 114129198ScognetSYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY, 115129198Scognet (sysinit_cfunc_t) elf32_insert_brand_entry, 116129198Scognet &freebsd_brand_oinfo); 117129198Scognet 118133464Smarcel 119133464Smarcelvoid 120133464Smarcelelf32_dump_thread(struct thread *td __unused, void *dst __unused, 121133464Smarcel size_t *off __unused) 122133464Smarcel{ 123133464Smarcel} 124133464Smarcel 125133464Smarcel 126129198Scognet/* Process one elf relocation with addend. */ 127129198Scognetstatic int 128129282Speterelf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, 129129282Speter int type, int local, elf_lookup_fn lookup) 130129198Scognet{ 131129198Scognet Elf_Addr *where; 132129198Scognet Elf_Addr addr; 133129198Scognet Elf_Addr addend; 134129198Scognet Elf_Word rtype, symidx; 135129198Scognet const Elf_Rel *rel; 136129198Scognet const Elf_Rela *rela; 137288287Skib int error; 138129198Scognet 139129198Scognet switch (type) { 140129198Scognet case ELF_RELOC_REL: 141129198Scognet rel = (const Elf_Rel *)data; 142129198Scognet where = (Elf_Addr *) (relocbase + rel->r_offset); 143129198Scognet addend = *where; 144129198Scognet rtype = ELF_R_TYPE(rel->r_info); 145129198Scognet symidx = ELF_R_SYM(rel->r_info); 146129198Scognet break; 147129198Scognet case ELF_RELOC_RELA: 148129198Scognet rela = (const Elf_Rela *)data; 149129198Scognet where = (Elf_Addr *) (relocbase + rela->r_offset); 150129198Scognet addend = rela->r_addend; 151129198Scognet rtype = ELF_R_TYPE(rela->r_info); 152129198Scognet symidx = ELF_R_SYM(rela->r_info); 153129198Scognet break; 154129198Scognet default: 155129198Scognet panic("unknown reloc type %d\n", type); 156129198Scognet } 157129198Scognet 158129198Scognet if (local) { 159129198Scognet if (rtype == R_ARM_RELATIVE) { /* A + B */ 160194784Sjeff addr = elf_relocaddr(lf, relocbase + addend); 161129198Scognet if (*where != addr) 162129198Scognet *where = addr; 163129198Scognet } 164129198Scognet return (0); 165129198Scognet } 166129198Scognet 167129198Scognet switch (rtype) { 168129198Scognet 169129198Scognet case R_ARM_NONE: /* none */ 170129198Scognet break; 171129198Scognet 172137211Scognet case R_ARM_ABS32: 173288287Skib error = lookup(lf, symidx, 1, &addr); 174288287Skib if (error != 0) 175129198Scognet return -1; 176218780Smarcel *where += addr; 177129198Scognet break; 178129198Scognet 179129198Scognet case R_ARM_COPY: /* none */ 180129198Scognet /* 181129198Scognet * There shouldn't be copy relocations in kernel 182129198Scognet * objects. 183129198Scognet */ 184129198Scognet printf("kldload: unexpected R_COPY relocation\n"); 185129198Scognet return -1; 186129198Scognet break; 187129198Scognet 188137211Scognet case R_ARM_JUMP_SLOT: 189288287Skib error = lookup(lf, symidx, 1, &addr); 190288287Skib if (error == 0) { 191129198Scognet *where = addr; 192137211Scognet return (0); 193137211Scognet } 194137211Scognet return (-1); 195129198Scognet case R_ARM_RELATIVE: 196129198Scognet break; 197129198Scognet 198129198Scognet default: 199129198Scognet printf("kldload: unexpected relocation type %d\n", 200129198Scognet rtype); 201129198Scognet return -1; 202129198Scognet } 203129198Scognet return(0); 204129198Scognet} 205129198Scognet 206129198Scognetint 207129282Speterelf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, 208129282Speter elf_lookup_fn lookup) 209129198Scognet{ 210129198Scognet 211129282Speter return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); 212129198Scognet} 213129198Scognet 214129198Scognetint 215129282Speterelf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, 216129282Speter int type, elf_lookup_fn lookup) 217129198Scognet{ 218129198Scognet 219129282Speter return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); 220129198Scognet} 221129198Scognet 222129198Scognetint 223129198Scognetelf_cpu_load_file(linker_file_t lf __unused) 224129198Scognet{ 225129198Scognet 226266373Sian /* 227266373Sian * The pmap code does not do an icache sync upon establishing executable 228266373Sian * mappings in the kernel pmap. It's an optimization based on the fact 229266373Sian * that kernel memory allocations always have EXECUTABLE protection even 230266373Sian * when the memory isn't going to hold executable code. The only time 231266373Sian * kernel memory holding instructions does need a sync is after loading 232266373Sian * a kernel module, and that's when this function gets called. Normal 233266373Sian * data cache maintenance has already been done by the IO code, and TLB 234266373Sian * maintenance has been done by the pmap code, so all we have to do here 235266373Sian * is invalidate the instruction cache (which also invalidates the 236266373Sian * branch predictor cache on platforms that have one). 237266373Sian */ 238266373Sian cpu_icache_sync_all(); 239129198Scognet return (0); 240129198Scognet} 241129198Scognet 242129198Scognetint 243129198Scognetelf_cpu_unload_file(linker_file_t lf __unused) 244129198Scognet{ 245129198Scognet 246129198Scognet return (0); 247129198Scognet} 248