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1 | /* |
2 | * Copyright (C) 2015 Imagination Technologies | |
3 | * Author: Alex Smith <alex.smith@imgtec.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | */ | |
10 | ||
11 | #include "vdso.h" | |
12 | ||
13 | #include <linux/elfnote.h> | |
14 | #include <linux/version.h> | |
15 | ||
16 | ELFNOTE_START(Linux, 0, "a") | |
17 | .long LINUX_VERSION_CODE | |
18 | ELFNOTE_END | |
19 | ||
20 | /* | |
21 | * The .MIPS.abiflags section must be defined with the FP ABI flags set | |
22 | * to 'any' to be able to link with both old and new libraries. | |
23 | * Newer toolchains are capable of automatically generating this, but we want | |
24 | * to work with older toolchains as well. Therefore, we define the contents of | |
25 | * this section here (under different names), and then genvdso will patch | |
26 | * it to have the correct name and type. | |
27 | * | |
28 | * We base the .MIPS.abiflags section on preprocessor definitions rather than | |
29 | * CONFIG_* because we need to match the particular ABI we are building the | |
30 | * VDSO for. | |
31 | * | |
32 | * See https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking | |
33 | * for the .MIPS.abiflags section description. | |
34 | */ | |
35 | ||
36 | .section .mips_abiflags, "a" | |
37 | .align 3 | |
38 | __mips_abiflags: | |
39 | .hword 0 /* version */ | |
40 | .byte __mips /* isa_level */ | |
41 | ||
42 | /* isa_rev */ | |
43 | #ifdef __mips_isa_rev | |
44 | .byte __mips_isa_rev | |
45 | #else | |
46 | .byte 0 | |
47 | #endif | |
48 | ||
49 | /* gpr_size */ | |
50 | #ifdef __mips64 | |
51 | .byte 2 /* AFL_REG_64 */ | |
52 | #else | |
53 | .byte 1 /* AFL_REG_32 */ | |
54 | #endif | |
55 | ||
56 | /* cpr1_size */ | |
57 | #if (defined(__mips_isa_rev) && __mips_isa_rev >= 6) || defined(__mips64) | |
58 | .byte 2 /* AFL_REG_64 */ | |
59 | #else | |
60 | .byte 1 /* AFL_REG_32 */ | |
61 | #endif | |
62 | ||
63 | .byte 0 /* cpr2_size (AFL_REG_NONE) */ | |
64 | .byte 0 /* fp_abi (Val_GNU_MIPS_ABI_FP_ANY) */ | |
65 | .word 0 /* isa_ext */ | |
66 | .word 0 /* ases */ | |
67 | .word 0 /* flags1 */ | |
68 | .word 0 /* flags2 */ |