1 /*- 2 * Copyright (c) 2000 Doug Rabson 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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <bootstrap.h> 31 #include <efi.h> 32 #include <eficonsctl.h> 33 #include <efilib.h> 34 #include <stand.h> 35 36 static EFI_PHYSICAL_ADDRESS heap; 37 static UINTN heapsize; 38 39 void 40 efi_exit(EFI_STATUS exit_code) 41 { 42 43 if (boot_services_active) { 44 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 45 BS->Exit(IH, exit_code, 0, NULL); 46 } else { 47 RS->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL); 48 } 49 } 50 51 void 52 exit(int status) 53 { 54 55 efi_exit(EFI_LOAD_ERROR); 56 } 57 58 static CHAR16 * 59 arg_skipsep(CHAR16 *argp) 60 { 61 62 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 63 argp++; 64 return (argp); 65 } 66 67 static CHAR16 * 68 arg_skipword(CHAR16 *argp) 69 { 70 71 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 72 argp++; 73 return (argp); 74 } 75 76 EFI_STATUS 77 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 78 { 79 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 80 static EFI_GUID console_control_protocol = 81 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 82 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 83 EFI_LOADED_IMAGE *img; 84 CHAR16 *argp, *args, **argv; 85 EFI_STATUS status; 86 int argc, addprog; 87 88 IH = image_handle; 89 ST = system_table; 90 BS = ST->BootServices; 91 RS = ST->RuntimeServices; 92 93 status = BS->LocateProtocol(&console_control_protocol, NULL, 94 (VOID **)&console_control); 95 if (status == EFI_SUCCESS) 96 (void)console_control->SetMode(console_control, 97 EfiConsoleControlScreenText); 98 99 heapsize = 64 * 1024 * 1024; 100 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 101 EFI_SIZE_TO_PAGES(heapsize), &heap); 102 if (status != EFI_SUCCESS) { 103 ST->ConOut->OutputString(ST->ConOut, (CHAR16 *)L"Failed to allocate memory for heap.\r\n"); 104 BS->Exit(IH, status, 0, NULL); 105 } 106 107 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 108 109 /* Start tslog now that we have a heap.*/ 110 tslog_init(); 111 112 /* Use efi_exit() from here on... */ 113 114 status = OpenProtocolByHandle(IH, &image_protocol, (void**)&img); 115 if (status != EFI_SUCCESS) 116 efi_exit(status); 117 118 /* 119 * Pre-process the (optional) load options. If the option string 120 * is given as an ASCII string, we use a poor man's ASCII to 121 * Unicode-16 translation. The size of the option string as given 122 * to us includes the terminating null character. We assume the 123 * string is an ASCII string if strlen() plus the terminating 124 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 125 * characters have the upper 8 bits non-zero, the terminating 126 * null character will cause a one-off. 127 * If the string is already in Unicode-16, we make a copy so that 128 * we know we can always modify the string. 129 */ 130 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 131 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 132 args = malloc(img->LoadOptionsSize << 1); 133 for (argc = 0; argc < (int)img->LoadOptionsSize; argc++) 134 args[argc] = ((char*)img->LoadOptions)[argc]; 135 } else { 136 args = malloc(img->LoadOptionsSize); 137 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 138 } 139 } else 140 args = NULL; 141 142 /* 143 * Use a quick and dirty algorithm to build the argv vector. We 144 * first count the number of words. Then, after allocating the 145 * vector, we split the string up. We don't deal with quotes or 146 * other more advanced shell features. 147 * The EFI shell will pass the name of the image as the first 148 * word in the argument list. This does not happen if we're 149 * loaded by the boot manager. This is not so easy to figure 150 * out though. The ParentHandle is not always NULL, because 151 * there can be a function (=image) that will perform the task 152 * for the boot manager. 153 */ 154 /* Part 1: Figure out if we need to add our program name. */ 155 addprog = (args == NULL || img->ParentHandle == NULL || 156 img->FilePath == NULL) ? 1 : 0; 157 if (!addprog) { 158 addprog = 159 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 160 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 161 DevicePathNodeLength(img->FilePath) <= 162 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 163 if (!addprog) { 164 /* XXX todo. */ 165 } 166 } 167 /* Part 2: count words. */ 168 argc = (addprog) ? 1 : 0; 169 argp = args; 170 while (argp != NULL && *argp != 0) { 171 argp = arg_skipsep(argp); 172 if (*argp == 0) 173 break; 174 argc++; 175 argp = arg_skipword(argp); 176 } 177 /* Part 3: build vector. */ 178 argv = malloc((argc + 1) * sizeof(CHAR16*)); 179 argc = 0; 180 if (addprog) 181 argv[argc++] = (CHAR16 *)L"loader.efi"; 182 argp = args; 183 while (argp != NULL && *argp != 0) { 184 argp = arg_skipsep(argp); 185 if (*argp == 0) 186 break; 187 argv[argc++] = argp; 188 argp = arg_skipword(argp); 189 /* Terminate the words. */ 190 if (*argp != 0) 191 *argp++ = 0; 192 } 193 argv[argc] = NULL; 194 195 status = main(argc, argv); 196 efi_exit(status); 197 return (status); 198 } 199