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git01.mediatek.com / filogic / uboot / 5d83fd2b24251c84c49ec9141d3bb2bf308c23fb / . / arch / arm / lib / crt0_arm_efi.S
blob: 23db49f1fc49294c66965fca7ec163b8b3ecff20 [file] [log] [blame]
Tom Rini8b0c8a12018-05-06 18:27:01 -0400[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */
Simon Glassfc03fb92016-11-07 08:47:10 -0700[diff] [blame]2/*
3 * crt0-efi-arm.S - PE/COFF header for ARM EFI applications
4 *
5 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
6 *
Simon Glassfc03fb92016-11-07 08:47:10 -0700[diff] [blame]7 * This file is taken and modified from the gnu-efi project.
8 */
9
Heinrich Schuchardt467fd7a2018-01-31 18:45:35 +0000[diff] [blame]10#include <asm-generic/pe.h>
11
Simon Glassfc03fb92016-11-07 08:47:10 -0700[diff] [blame]12 .section .text.head
13
14 /*
15 * Magic "MZ" signature for PE/COFF
16 */
17 .globl image_base
18image_base:
19 .ascii "MZ"
20 .skip 58 /* 'MZ' + pad + offset == 64 */
21 .long pe_header - image_base /* Offset to the PE header */
22pe_header:
23 .ascii "PE"
24 .short 0
25coff_header:
26 .short 0x1c2 /* Mixed ARM/Thumb */
27 .short 2 /* nr_sections */
28 .long 0 /* TimeDateStamp */
29 .long 0 /* PointerToSymbolTable */
30 .long 1 /* NumberOfSymbols */
31 .short section_table - optional_header /* SizeOfOptionalHeader */
32 /*
33 * Characteristics: IMAGE_FILE_32BIT_MACHINE |
34 * IMAGE_FILE_DEBUG_STRIPPED | IMAGE_FILE_EXECUTABLE_IMAGE |
35 * IMAGE_FILE_LINE_NUMS_STRIPPED
36 */
37 .short 0x306
38optional_header:
39 .short 0x10b /* PE32+ format */
40 .byte 0x02 /* MajorLinkerVersion */
41 .byte 0x14 /* MinorLinkerVersion */
42 .long _edata - _start /* SizeOfCode */
43 .long 0 /* SizeOfInitializedData */
44 .long 0 /* SizeOfUninitializedData */
45 .long _start - image_base /* AddressOfEntryPoint */
46 .long _start - image_base /* BaseOfCode */
47 .long 0 /* BaseOfData */
48
49extra_header_fields:
50 .long 0 /* image_base */
51 .long 0x20 /* SectionAlignment */
52 .long 0x8 /* FileAlignment */
53 .short 0 /* MajorOperatingSystemVersion */
54 .short 0 /* MinorOperatingSystemVersion */
55 .short 0 /* MajorImageVersion */
56 .short 0 /* MinorImageVersion */
57 .short 0 /* MajorSubsystemVersion */
58 .short 0 /* MinorSubsystemVersion */
59 .long 0 /* Win32VersionValue */
60
61 .long _edata - image_base /* SizeOfImage */
62
63 /*
64 * Everything before the kernel image is considered part of the header
65 */
66 .long _start - image_base /* SizeOfHeaders */
67 .long 0 /* CheckSum */
Heinrich Schuchardt467fd7a2018-01-31 18:45:35 +0000[diff] [blame]68 .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
Simon Glassfc03fb92016-11-07 08:47:10 -0700[diff] [blame]69 .short 0 /* DllCharacteristics */
70 .long 0 /* SizeOfStackReserve */
71 .long 0 /* SizeOfStackCommit */
72 .long 0 /* SizeOfHeapReserve */
73 .long 0 /* SizeOfHeapCommit */
74 .long 0 /* LoaderFlags */
75 .long 0x6 /* NumberOfRvaAndSizes */
76
77 .quad 0 /* ExportTable */
78 .quad 0 /* ImportTable */
79 .quad 0 /* ResourceTable */
80 .quad 0 /* ExceptionTable */
81 .quad 0 /* CertificationTable */
82 .quad 0 /* BaseRelocationTable */
83
84section_table:
85
86 /*
87 * The EFI application loader requires a relocation section
88 * because EFI applications must be relocatable. This is a
89 * dummy section as far as we are concerned.
90 */
91 .ascii ".reloc"
92 .byte 0
93 .byte 0 /* end of 0 padding of section name */
94 .long 0
95 .long 0
96 .long 0 /* SizeOfRawData */
97 .long 0 /* PointerToRawData */
98 .long 0 /* PointerToRelocations */
99 .long 0 /* PointerToLineNumbers */
100 .short 0 /* NumberOfRelocations */
101 .short 0 /* NumberOfLineNumbers */
102 .long 0x42100040 /* Characteristics (section flags) */
103
104 .ascii ".text"
105 .byte 0
106 .byte 0
107 .byte 0 /* end of 0 padding of section name */
108 .long _edata - _start /* VirtualSize */
109 .long _start - image_base /* VirtualAddress */
110 .long _edata - _start /* SizeOfRawData */
111 .long _start - image_base /* PointerToRawData */
112
113 .long 0 /* PointerToRelocations (0 for executables) */
114 .long 0 /* PointerToLineNumbers (0 for executables) */
115 .short 0 /* NumberOfRelocations (0 for executables) */
116 .short 0 /* NumberOfLineNumbers (0 for executables) */
117 .long 0xe0500020 /* Characteristics (section flags) */
118
119_start:
120 stmfd sp!, {r0-r2, lr}
121
Simon Glassfc03fb92016-11-07 08:47:10 -0700[diff] [blame]122 adr r1, .L_DYNAMIC
123 ldr r0, [r1]
124 add r1, r0, r1
125 adr r0, image_base
126 bl _relocate
127 teq r0, #0
128 bne 0f
129
130 ldmfd sp, {r0-r1}
131 bl efi_main
132
1330: add sp, sp, #12
134 ldr pc, [sp], #4
135
136.L_DYNAMIC:
137 .word _DYNAMIC - .