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