2 * Copyright (c) 2000 Doug Rabson
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 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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
36 EFI_BOOT_SERVICES *BS;
37 EFI_RUNTIME_SERVICES *RS;
39 static EFI_PHYSICAL_ADDRESS heap;
40 static UINTN heapsize;
43 arg_skipsep(CHAR16 *argp)
46 while (*argp == ' ' || *argp == '\t')
52 arg_skipword(CHAR16 *argp)
55 while (*argp && *argp != ' ' && *argp != '\t')
61 efi_get_table(EFI_GUID *tbl)
66 for (i = 0; i < ST->NumberOfTableEntries; i++) {
67 id = &ST->ConfigurationTable[i].VendorGuid;
68 if (!memcmp(id, tbl, sizeof(EFI_GUID)))
69 return (ST->ConfigurationTable[i].VendorTable);
74 void exit(EFI_STATUS exit_code)
77 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize));
78 BS->Exit(IH, exit_code, 0, NULL);
82 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
84 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL;
85 EFI_LOADED_IMAGE *img;
86 CHAR16 *argp, *args, **argv;
92 BS = ST->BootServices;
93 RS = ST->RuntimeServices;
95 heapsize = 2 * 1024 * 1024;
96 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
97 EFI_SIZE_TO_PAGES(heapsize), &heap);
98 if (status != EFI_SUCCESS)
99 BS->Exit(IH, status, 0, NULL);
101 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize));
103 /* Use exit() from here on... */
105 status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img);
106 if (status != EFI_SUCCESS)
110 * Pre-process the (optional) load options. If the option string
111 * is given as an ASCII string, we use a poor man's ASCII to
112 * Unicode-16 translation. The size of the option string as given
113 * to us includes the terminating null character. We assume the
114 * string is an ASCII string if strlen() plus the terminating
115 * '\0' is less than LoadOptionsSize. Even if all Unicode-16
116 * characters have the upper 8 bits non-zero, the terminating
117 * null character will cause a one-off.
118 * If the string is already in Unicode-16, we make a copy so that
119 * we know we can always modify the string.
121 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) {
122 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) {
123 args = malloc(img->LoadOptionsSize << 1);
124 for (argc = 0; argc < img->LoadOptionsSize; argc++)
125 args[argc] = ((char*)img->LoadOptions)[argc];
127 args = malloc(img->LoadOptionsSize);
128 memcpy(args, img->LoadOptions, img->LoadOptionsSize);
134 * Use a quick and dirty algorithm to build the argv vector. We
135 * first count the number of words. Then, after allocating the
136 * vector, we split the string up. We don't deal with quotes or
137 * other more advanced shell features.
138 * The EFI shell will pas the name of the image as the first
139 * word in the argument list. This does not happen if we're
140 * loaded by the boot manager. This is not so easy to figure
141 * out though. The ParentHandle is not always NULL, because
142 * there can be a function (=image) that will perform the task
143 * for the boot manager.
145 /* Part 1: Figure out if we need to add our program name. */
146 addprog = (args == NULL || img->ParentHandle == NULL ||
147 img->FilePath == NULL) ? 1 : 0;
150 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH ||
151 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP ||
152 DevicePathNodeLength(img->FilePath) <=
153 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0;
158 /* Part 2: count words. */
159 argc = (addprog) ? 1 : 0;
161 while (argp != NULL && *argp != 0) {
162 argp = arg_skipsep(argp);
166 argp = arg_skipword(argp);
168 /* Part 3: build vector. */
169 argv = malloc((argc + 1) * sizeof(CHAR16*));
172 argv[argc++] = L"loader.efi";
174 while (argp != NULL && *argp != 0) {
175 argp = arg_skipsep(argp);
179 argp = arg_skipword(argp);
180 /* Terminate the words. */
186 status = main(argc, argv);