1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright 2025 Oxide Computer Company 29 */ 30 31 /* 32 * Miscellaneous ISA-specific code. 33 */ 34 #include <sys/types.h> 35 #include <sys/elf.h> 36 #include <sys/kobj.h> 37 #include <sys/kobj_impl.h> 38 39 /* 40 * Check that an ELF header corresponds to this machine's 41 * instruction set architecture. Used by kobj_load_module() 42 * to not get confused by a misplaced driver or kernel module 43 * built for a different ISA. 44 */ 45 int 46 elf_mach_ok(Elf64_Ehdr *h) 47 { 48 return ((h->e_ident[EI_DATA] == ELFDATA2LSB) && 49 (h->e_machine == EM_AMD64)); 50 } 51 52 /* 53 * return non-zero for a bad address 54 */ 55 int 56 kobj_addrcheck(void *xmp, caddr_t adr) 57 { 58 struct module *mp; 59 60 mp = (struct module *)xmp; 61 62 if ((adr >= mp->text && adr < mp->text + mp->text_size) || 63 (adr >= mp->data && adr < mp->data + mp->data_size)) 64 return (0); /* ok */ 65 if (mp->bss && adr >= (caddr_t)mp->bss && 66 adr < (caddr_t)mp->bss + mp->bss_size) 67 return (0); 68 return (1); 69 } 70 71 72 /* 73 * Flush instruction cache after updating text 74 * This is a nop for this machine arch. 75 */ 76 /*ARGSUSED*/ 77 void 78 kobj_sync_instruction_memory(caddr_t addr, size_t len) 79 {} 80 81 /* 82 * Calculate memory image required for relocable object. 83 */ 84 /* ARGSUSED3 */ 85 int 86 get_progbits_size(struct module *mp, struct proginfo *tp, struct proginfo *dp, 87 struct proginfo *sdp) 88 { 89 struct proginfo *pp; 90 uint_t shn; 91 Shdr *shp; 92 93 /* 94 * loop through sections to find out how much space we need 95 * for text, data, (also bss that is already assigned) 96 */ 97 for (shn = 1; shn < mp->shnum; shn++) { 98 shp = (Shdr *)(mp->shdrs + shn * mp->hdr.e_shentsize); 99 if (!(shp->sh_flags & SHF_ALLOC)) 100 continue; 101 if (shp->sh_addr != 0) { 102 _kobj_printf(ops, 103 "%s non-zero sect addr in input file\n", 104 mp->filename); 105 return (-1); 106 } 107 pp = (shp->sh_flags & SHF_WRITE)? dp : tp; 108 109 if (shp->sh_addralign > pp->align) 110 pp->align = shp->sh_addralign; 111 pp->size = ALIGN(pp->size, shp->sh_addralign); 112 pp->size += ALIGN(shp->sh_size, 8); 113 } 114 tp->size = ALIGN(tp->size, 8); 115 dp->size = ALIGN(dp->size, 8); 116 return (0); 117 } 118