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54a3d5ec AC |
1 | /** @file\r |
2 | PE/Coff loader for RISC-V PE image\r | |
3 | \r | |
4 | Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | **/\r | |
7 | #include "BasePeCoffLibInternals.h"\r | |
8 | #include <Library/BaseLib.h>\r | |
9 | \r | |
10 | /**\r | |
11 | Performs an RISC-V specific relocation fixup and is a no-op on\r | |
12 | other instruction sets.\r | |
13 | RISC-V splits 32-bit fixup into 20bit and 12-bit with two relocation\r | |
14 | types. We have to know the lower 12-bit fixup first then we can deal\r | |
15 | carry over on high 20-bit fixup. So we log the high 20-bit in\r | |
16 | FixupData.\r | |
17 | \r | |
18 | @param Reloc The pointer to the relocation record.\r | |
19 | @param Fixup The pointer to the address to fix up.\r | |
20 | @param FixupData The pointer to a buffer to log the fixups.\r | |
21 | @param Adjust The offset to adjust the fixup.\r | |
22 | \r | |
23 | @return Status code.\r | |
24 | \r | |
25 | **/\r | |
26 | RETURN_STATUS\r | |
27 | PeCoffLoaderRelocateImageEx (\r | |
2f88bd3a MK |
28 | IN UINT16 *Reloc,\r |
29 | IN OUT CHAR8 *Fixup,\r | |
30 | IN OUT CHAR8 **FixupData,\r | |
31 | IN UINT64 Adjust\r | |
54a3d5ec AC |
32 | )\r |
33 | {\r | |
2f88bd3a MK |
34 | UINT32 Value;\r |
35 | UINT32 Value2;\r | |
36 | UINT32 *RiscVHi20Fixup;\r | |
54a3d5ec AC |
37 | \r |
38 | switch ((*Reloc) >> 12) {\r | |
2f88bd3a | 39 | case EFI_IMAGE_REL_BASED_RISCV_HI20:\r |
54a3d5ec AC |
40 | *(UINT64 *)(*FixupData) = (UINT64)(UINTN)Fixup;\r |
41 | break;\r | |
42 | \r | |
2f88bd3a | 43 | case EFI_IMAGE_REL_BASED_RISCV_LOW12I:\r |
54a3d5ec AC |
44 | RiscVHi20Fixup = (UINT32 *)(*(UINT64 *)(*FixupData));\r |
45 | if (RiscVHi20Fixup != NULL) {\r | |
2f88bd3a MK |
46 | Value = (UINT32)(RV_X (*RiscVHi20Fixup, 12, 20) << 12);\r |
47 | Value2 = (UINT32)(RV_X (*(UINT32 *)Fixup, 20, 12));\r | |
54a3d5ec AC |
48 | if (Value2 & (RISCV_IMM_REACH/2)) {\r |
49 | Value2 |= ~(RISCV_IMM_REACH-1);\r | |
50 | }\r | |
2f88bd3a MK |
51 | \r |
52 | Value += Value2;\r | |
53 | Value += (UINT32)Adjust;\r | |
54 | Value2 = RISCV_CONST_HIGH_PART (Value);\r | |
55 | *(UINT32 *)RiscVHi20Fixup = (RV_X (Value2, 12, 20) << 12) | \\r | |
56 | (RV_X (*(UINT32 *)RiscVHi20Fixup, 0, 12));\r | |
57 | *(UINT32 *)Fixup = (RV_X (Value, 0, 12) << 20) | \\r | |
54a3d5ec AC |
58 | (RV_X (*(UINT32 *)Fixup, 0, 20));\r |
59 | }\r | |
2f88bd3a | 60 | \r |
54a3d5ec AC |
61 | break;\r |
62 | \r | |
2f88bd3a | 63 | case EFI_IMAGE_REL_BASED_RISCV_LOW12S:\r |
54a3d5ec AC |
64 | RiscVHi20Fixup = (UINT32 *)(*(UINT64 *)(*FixupData));\r |
65 | if (RiscVHi20Fixup != NULL) {\r | |
2f88bd3a MK |
66 | Value = (UINT32)(RV_X (*RiscVHi20Fixup, 12, 20) << 12);\r |
67 | Value2 = (UINT32)(RV_X (*(UINT32 *)Fixup, 7, 5) | (RV_X (*(UINT32 *)Fixup, 25, 7) << 5));\r | |
54a3d5ec AC |
68 | if (Value2 & (RISCV_IMM_REACH/2)) {\r |
69 | Value2 |= ~(RISCV_IMM_REACH-1);\r | |
70 | }\r | |
2f88bd3a MK |
71 | \r |
72 | Value += Value2;\r | |
73 | Value += (UINT32)Adjust;\r | |
74 | Value2 = RISCV_CONST_HIGH_PART (Value);\r | |
54a3d5ec | 75 | *(UINT32 *)RiscVHi20Fixup = (RV_X (Value2, 12, 20) << 12) | \\r |
2f88bd3a MK |
76 | (RV_X (*(UINT32 *)RiscVHi20Fixup, 0, 12));\r |
77 | Value2 = *(UINT32 *)Fixup & 0x01fff07f;\r | |
78 | Value &= RISCV_IMM_REACH - 1;\r | |
79 | *(UINT32 *)Fixup = Value2 | (UINT32)(((RV_X (Value, 0, 5) << 7) | (RV_X (Value, 5, 7) << 25)));\r | |
54a3d5ec | 80 | }\r |
2f88bd3a | 81 | \r |
54a3d5ec AC |
82 | break;\r |
83 | \r | |
2f88bd3a | 84 | default:\r |
54a3d5ec | 85 | return RETURN_UNSUPPORTED;\r |
54a3d5ec | 86 | }\r |
2f88bd3a | 87 | \r |
54a3d5ec AC |
88 | return RETURN_SUCCESS;\r |
89 | }\r | |
90 | \r | |
91 | /**\r | |
92 | Returns TRUE if the machine type of PE/COFF image is supported. Supported\r | |
93 | does not mean the image can be executed it means the PE/COFF loader supports\r | |
94 | loading and relocating of the image type. It's up to the caller to support\r | |
95 | the entry point.\r | |
96 | \r | |
97 | @param Machine Machine type from the PE Header.\r | |
98 | \r | |
99 | @return TRUE if this PE/COFF loader can load the image\r | |
100 | \r | |
101 | **/\r | |
102 | BOOLEAN\r | |
103 | PeCoffLoaderImageFormatSupported (\r | |
104 | IN UINT16 Machine\r | |
105 | )\r | |
106 | {\r | |
107 | if (Machine == IMAGE_FILE_MACHINE_RISCV64) {\r | |
108 | return TRUE;\r | |
109 | }\r | |
110 | \r | |
111 | return FALSE;\r | |
112 | }\r | |
113 | \r | |
114 | /**\r | |
115 | Performs an Itanium-based specific re-relocation fixup and is a no-op on other\r | |
116 | instruction sets. This is used to re-relocated the image into the EFI virtual\r | |
117 | space for runtime calls.\r | |
118 | \r | |
119 | @param Reloc The pointer to the relocation record.\r | |
120 | @param Fixup The pointer to the address to fix up.\r | |
121 | @param FixupData The pointer to a buffer to log the fixups.\r | |
122 | @param Adjust The offset to adjust the fixup.\r | |
123 | \r | |
124 | @return Status code.\r | |
125 | \r | |
126 | **/\r | |
127 | RETURN_STATUS\r | |
128 | PeHotRelocateImageEx (\r | |
2f88bd3a MK |
129 | IN UINT16 *Reloc,\r |
130 | IN OUT CHAR8 *Fixup,\r | |
131 | IN OUT CHAR8 **FixupData,\r | |
132 | IN UINT64 Adjust\r | |
54a3d5ec AC |
133 | )\r |
134 | {\r | |
135 | return RETURN_UNSUPPORTED;\r | |
136 | }\r |