1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6 27 */ 28#include <stand.h> 29#include <sys/param.h> 30#include <sys/linker.h> 31#include <sys/boot.h> 32#include <sys/reboot.h> 33#if defined(LOADER_FDT_SUPPORT) 34#include <fdt_platform.h> 35#endif 36 37#ifdef __arm__ 38#include <machine/elf.h> 39#endif 40#include <machine/metadata.h> 41 42#include "bootstrap.h" 43#include "modinfo.h" 44 45/* 46 * Copy module-related data into the load area, where it can be 47 * used as a directory for loaded modules. 48 * 49 * Module data is presented in a self-describing format. Each datum 50 * is preceded by a 32-bit identifier and a 32-bit size field. 51 * 52 * Currently, the following data are saved: 53 * 54 * MOD_NAME (variable) module name (string) 55 * MOD_TYPE (variable) module type (string) 56 * MOD_ARGS (variable) module parameters (string) 57 * MOD_ADDR sizeof(vm_offset_t) module load address 58 * MOD_SIZE sizeof(size_t) module size 59 * MOD_METADATA (variable) type-specific metadata 60 * 61 * Clients are required to define a MOD_ALIGN(l) macro which rounds the passed 62 * in length to the required alignment for the kernel being booted. 63 */ 64 65#define COPY32(v, a, c) { \ 66 uint32_t x = (v); \ 67 if (c) \ 68 archsw.arch_copyin(&x, a, sizeof(x)); \ 69 a += sizeof(x); \ 70} 71 72#define MOD_STR(t, a, s, c) { \ 73 COPY32(t, a, c); \ 74 COPY32(strlen(s) + 1, a, c) \ 75 if (c) \ 76 archsw.arch_copyin(s, a, strlen(s) + 1);\ 77 a += MOD_ALIGN(strlen(s) + 1); \ 78} 79 80#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c) 81#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c) 82#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c) 83 84#define MOD_VAR(t, a, s, c) { \ 85 COPY32(t, a, c); \ 86 COPY32(sizeof(s), a, c); \ 87 if (c) \ 88 archsw.arch_copyin(&s, a, sizeof(s)); \ 89 a += MOD_ALIGN(sizeof(s)); \ 90} 91 92#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c) 93#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c) 94 95#define MOD_METADATA(a, mm, c) { \ 96 COPY32(MODINFO_METADATA | mm->md_type, a, c);\ 97 COPY32(mm->md_size, a, c); \ 98 if (c) { \ 99 archsw.arch_copyin(mm->md_data, a, mm->md_size);\ 100 mm->md_addr = a; \ 101 } \ 102 a += MOD_ALIGN(mm->md_size); \ 103} 104 105#define MOD_END(a, c) { \ 106 COPY32(MODINFO_END, a, c); \ 107 COPY32(0, a, c); \ 108} 109 110#define MOD_ALIGN(l) roundup(l, align) 111 112vm_offset_t 113md_copymodules(vm_offset_t addr, bool kern64) 114{ 115 struct preloaded_file *fp; 116 struct file_metadata *md; 117 uint64_t scratch64; 118 uint32_t scratch32; 119 int c; 120 int align; 121 122 align = kern64 ? sizeof(uint64_t) : sizeof(uint32_t); 123 c = addr != 0; 124 /* start with the first module on the list, should be the kernel */ 125 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) { 126 127 MOD_NAME(addr, fp->f_name, c); /* this field must come first */ 128 MOD_TYPE(addr, fp->f_type, c); 129 if (fp->f_args) 130 MOD_ARGS(addr, fp->f_args, c); 131 if (kern64) { 132 scratch64 = fp->f_addr; 133 MOD_ADDR(addr, scratch64, c); 134 scratch64 = fp->f_size; 135 MOD_SIZE(addr, scratch64, c); 136 } else { 137 scratch32 = fp->f_addr; 138#ifdef __arm__ 139 scratch32 -= __elfN(relocation_offset); 140#endif 141 MOD_ADDR(addr, scratch32, c); 142 MOD_SIZE(addr, fp->f_size, c); 143 } 144 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 145 if (!(md->md_type & MODINFOMD_NOCOPY)) { 146 MOD_METADATA(addr, md, c); 147 } 148 } 149 } 150 MOD_END(addr, c); 151 return(addr); 152} 153 154/* 155 * Copy the environment into the load area starting at (addr). 156 * Each variable is formatted as <name>=<value>, with a single nul 157 * separating each variable, and a double nul terminating the environment. 158 */ 159vm_offset_t 160md_copyenv(vm_offset_t start) 161{ 162 struct env_var *ep; 163 vm_offset_t addr, last; 164 size_t len; 165 166 addr = last = start; 167 168 /* Traverse the environment. */ 169 for (ep = environ; ep != NULL; ep = ep->ev_next) { 170 len = strlen(ep->ev_name); 171 if ((size_t)archsw.arch_copyin(ep->ev_name, addr, len) != len) 172 break; 173 addr += len; 174 if (archsw.arch_copyin("=", addr, 1) != 1) 175 break; 176 addr++; 177 if (ep->ev_value != NULL) { 178 len = strlen(ep->ev_value); 179 if ((size_t)archsw.arch_copyin(ep->ev_value, addr, len) != len) 180 break; 181 addr += len; 182 } 183 if (archsw.arch_copyin("", addr, 1) != 1) 184 break; 185 last = ++addr; 186 } 187 188 if (archsw.arch_copyin("", last++, 1) != 1) 189 last = start; 190 return(last); 191} 192