]>
Commit | Line | Data |
---|---|---|
1 | /** @file\r | |
2 | This program generates a hex array to be manually coppied into\r | |
3 | OvmfXen.fdf.\r | |
4 | \r | |
5 | The purpose is for the flash device image to be recognize as an ELF.\r | |
6 | \r | |
7 | Copyright (c) 2019, Citrix Systems, Inc.\r | |
8 | \r | |
9 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
10 | **/\r | |
11 | \r | |
12 | #include "elf.h"\r | |
13 | #include "fcntl.h"\r | |
14 | #include "stdbool.h"\r | |
15 | #include "stddef.h"\r | |
16 | #include "stdio.h"\r | |
17 | #include "stdlib.h"\r | |
18 | \r | |
19 | void\r | |
20 | print_hdr (\r | |
21 | FILE *file,\r | |
22 | void *s,\r | |
23 | size_t size,\r | |
24 | bool end_delimiter\r | |
25 | )\r | |
26 | {\r | |
27 | char *c = s;\r | |
28 | \r | |
29 | fprintf (file, " ");\r | |
30 | while (size-- > 1) {\r | |
31 | fprintf (file, "0x%02hhx, ", *(c++));\r | |
32 | }\r | |
33 | \r | |
34 | if (end_delimiter) {\r | |
35 | fprintf (file, "0x%02hhx,", *c);\r | |
36 | } else {\r | |
37 | fprintf (file, "0x%02hhx", *c);\r | |
38 | }\r | |
39 | }\r | |
40 | \r | |
41 | /* Format for the XEN_ELFNOTE_PHYS32_ENTRY program segment */\r | |
42 | #define XEN_ELFNOTE_PHYS32_ENTRY 18\r | |
43 | typedef struct {\r | |
44 | uint32_t name_size;\r | |
45 | uint32_t desc_size;\r | |
46 | uint32_t type;\r | |
47 | char name[4];\r | |
48 | uint32_t desc;\r | |
49 | } xen_elfnote_phys32_entry;\r | |
50 | \r | |
51 | #define LICENSE_HDR "\\r | |
52 | ## @file\r\n\\r | |
53 | # FDF include file that defines a PVH ELF header.\r\n\\r | |
54 | #\r\n\\r | |
55 | # Copyright (c) 2022, Intel Corporation. All rights reserved.\r\n\\r | |
56 | #\r\n\\r | |
57 | # SPDX-License-Identifier: BSD-2-Clause-Patent\r\n\\r | |
58 | #\r\n\\r | |
59 | ##\r\n\\r | |
60 | \r\n\\r | |
61 | "\r | |
62 | \r | |
63 | int\r | |
64 | main (\r | |
65 | int argc,\r | |
66 | char *argv[]\r | |
67 | )\r | |
68 | {\r | |
69 | /* FW_SIZE */\r | |
70 | size_t ovmf_blob_size = 0x00200000;\r | |
71 | /* Load OVMF at 1MB when running as PVH guest */\r | |
72 | uint32_t ovmf_base_address = 0x00100000;\r | |
73 | uint32_t ovmfxen_pvh_entry_point;\r | |
74 | size_t offset_into_file = 0;\r | |
75 | char *endptr, *str;\r | |
76 | long param;\r | |
77 | FILE *file = stdout;\r | |
78 | \r | |
79 | /* Parse the size parameter */\r | |
80 | if (argc > 1) {\r | |
81 | str = argv[1];\r | |
82 | param = strtol (str, &endptr, 10);\r | |
83 | if (endptr != str) {\r | |
84 | ovmf_blob_size = (size_t)param;\r | |
85 | }\r | |
86 | }\r | |
87 | \r | |
88 | /* Parse the filepath parameter */\r | |
89 | if (argc > 2) {\r | |
90 | file = fopen (argv[2], "w");\r | |
91 | fprintf (file, LICENSE_HDR);\r | |
92 | }\r | |
93 | \r | |
94 | /* Xen PVH entry point */\r | |
95 | ovmfxen_pvh_entry_point = ovmf_base_address + ovmf_blob_size - 0x30;\r | |
96 | \r | |
97 | /* ELF file header */\r | |
98 | #ifdef PVH64\r | |
99 | Elf64_Ehdr hdr = {\r | |
100 | #else\r | |
101 | Elf32_Ehdr hdr = {\r | |
102 | #endif\r | |
103 | .e_ident = ELFMAG,\r | |
104 | .e_type = ET_EXEC,\r | |
105 | .e_machine = EM_386,\r | |
106 | .e_version = EV_CURRENT,\r | |
107 | .e_entry = ovmfxen_pvh_entry_point,\r | |
108 | .e_flags = R_386_NONE,\r | |
109 | .e_ehsize = sizeof (hdr),\r | |
110 | #ifdef PVH64\r | |
111 | .e_phentsize = sizeof (Elf64_Phdr),\r | |
112 | #else\r | |
113 | .e_phentsize = sizeof (Elf32_Phdr),\r | |
114 | #endif\r | |
115 | };\r | |
116 | \r | |
117 | offset_into_file += sizeof (hdr);\r | |
118 | \r | |
119 | #ifdef PVH64\r | |
120 | hdr.e_ident[EI_CLASS] = ELFCLASS64;\r | |
121 | #else\r | |
122 | hdr.e_ident[EI_CLASS] = ELFCLASS32;\r | |
123 | #endif\r | |
124 | hdr.e_ident[EI_DATA] = ELFDATA2LSB;\r | |
125 | hdr.e_ident[EI_VERSION] = EV_CURRENT;\r | |
126 | hdr.e_ident[EI_OSABI] = ELFOSABI_LINUX;\r | |
127 | /* Placing program headers just after hdr */\r | |
128 | hdr.e_phoff = sizeof (hdr);\r | |
129 | \r | |
130 | /* program header */\r | |
131 | #ifdef PVH64\r | |
132 | Elf64_Phdr phdr_load = {\r | |
133 | #else\r | |
134 | Elf32_Phdr phdr_load = {\r | |
135 | #endif\r | |
136 | .p_type = PT_LOAD,\r | |
137 | .p_offset = 0, /* load everything */\r | |
138 | .p_paddr = ovmf_base_address,\r | |
139 | .p_filesz = ovmf_blob_size,\r | |
140 | .p_memsz = ovmf_blob_size,\r | |
141 | .p_flags = PF_X | PF_W | PF_R,\r | |
142 | #ifdef PVH64\r | |
143 | .p_align = 4,\r | |
144 | #else\r | |
145 | .p_align = 0,\r | |
146 | #endif\r | |
147 | };\r | |
148 | \r | |
149 | phdr_load.p_vaddr = phdr_load.p_paddr;\r | |
150 | hdr.e_phnum += 1;\r | |
151 | offset_into_file += sizeof (phdr_load);\r | |
152 | \r | |
153 | /* Xen ELF Note. */\r | |
154 | \r | |
155 | xen_elfnote_phys32_entry xen_elf_note = {\r | |
156 | .type = XEN_ELFNOTE_PHYS32_ENTRY,\r | |
157 | .name = "Xen",\r | |
158 | .desc = ovmfxen_pvh_entry_point,\r | |
159 | .name_size =\r | |
160 | offsetof (xen_elfnote_phys32_entry, desc) -\r | |
161 | offsetof (xen_elfnote_phys32_entry, name),\r | |
162 | .desc_size =\r | |
163 | sizeof (xen_elfnote_phys32_entry) -\r | |
164 | offsetof (xen_elfnote_phys32_entry, desc),\r | |
165 | };\r | |
166 | #ifdef PVH64\r | |
167 | Elf64_Phdr phdr_note = {\r | |
168 | #else\r | |
169 | Elf32_Phdr phdr_note = {\r | |
170 | #endif\r | |
171 | .p_type = PT_NOTE,\r | |
172 | .p_filesz = sizeof (xen_elf_note),\r | |
173 | .p_memsz = sizeof (xen_elf_note),\r | |
174 | .p_flags = PF_R,\r | |
175 | #ifdef PVH64\r | |
176 | .p_align = 4,\r | |
177 | #else\r | |
178 | .p_align = 0,\r | |
179 | #endif\r | |
180 | };\r | |
181 | \r | |
182 | hdr.e_phnum += 1;\r | |
183 | offset_into_file += sizeof (phdr_note);\r | |
184 | phdr_note.p_offset = offset_into_file;\r | |
185 | phdr_note.p_paddr = ovmf_base_address + phdr_note.p_offset;\r | |
186 | phdr_note.p_vaddr = phdr_note.p_paddr;\r | |
187 | \r | |
188 | /*\r | |
189 | * print elf header\r | |
190 | */\r | |
191 | \r | |
192 | size_t i;\r | |
193 | size_t hdr_size = sizeof (hdr);\r | |
194 | size_t entry_off = offsetof (typeof(hdr), e_entry);\r | |
195 | \r | |
196 | fprintf (file, "DATA = {\r\n");\r | |
197 | \r | |
198 | fprintf (file, " # ELF file header\r\n");\r | |
199 | print_hdr (file, &hdr, entry_off, true);\r | |
200 | fprintf (file, "\r\n");\r | |
201 | print_hdr (file, &hdr.e_entry, sizeof (hdr.e_entry), true);\r | |
202 | fprintf (file, " # hdr.e_entry\r\n");\r | |
203 | print_hdr (file, &hdr.e_entry + 1, hdr_size - entry_off - sizeof (hdr.e_entry), true);\r | |
204 | \r | |
205 | fprintf (file, "\r\n\r\n # ELF Program segment headers\r\n");\r | |
206 | fprintf (file, " # - Load segment\r\n");\r | |
207 | for (i = 0; i < sizeof (phdr_load); i += 4) {\r | |
208 | print_hdr (file, ((char *)&phdr_load) + i, 4, true);\r | |
209 | fprintf (file, "\r\n");\r | |
210 | }\r | |
211 | \r | |
212 | fprintf (file, " # - ELFNOTE segment\r\n");\r | |
213 | for (i = 0; i < sizeof (phdr_note); i += 4) {\r | |
214 | print_hdr (file, ((char *)&phdr_note) + i, 4, true);\r | |
215 | fprintf (file, "\r\n");\r | |
216 | }\r | |
217 | \r | |
218 | fprintf (file, "\r\n # XEN_ELFNOTE_PHYS32_ENTRY\r\n");\r | |
219 | for (i = 0; i < sizeof (xen_elf_note); i += 4) {\r | |
220 | print_hdr (file, ((char *)&xen_elf_note) + i, 4, (sizeof (xen_elf_note) - i) > 4);\r | |
221 | fprintf (file, "\r\n");\r | |
222 | }\r | |
223 | \r | |
224 | fprintf (file, "}\r\n");\r | |
225 | \r | |
226 | return 0;\r | |
227 | }\r |