diff options
Diffstat (limited to 'arch/mips/vdso/elf.S')
| -rw-r--r-- | arch/mips/vdso/elf.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/mips/vdso/elf.S b/arch/mips/vdso/elf.S new file mode 100644 index 000000000..a25cb147f --- /dev/null +++ b/arch/mips/vdso/elf.S | |||
| @@ -0,0 +1,62 @@ | |||
| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ | ||
| 2 | /* | ||
| 3 | * Copyright (C) 2015 Imagination Technologies | ||
| 4 | * Author: Alex Smith <alex.smith@imgtec.com> | ||
| 5 | */ | ||
| 6 | |||
| 7 | #include <asm/vdso/vdso.h> | ||
| 8 | |||
| 9 | #include <asm/isa-rev.h> | ||
| 10 | |||
| 11 | #include <linux/elfnote.h> | ||
| 12 | #include <linux/version.h> | ||
| 13 | |||
| 14 | ELFNOTE_START(Linux, 0, "a") | ||
| 15 | .long LINUX_VERSION_CODE | ||
| 16 | ELFNOTE_END | ||
| 17 | |||
| 18 | /* | ||
| 19 | * The .MIPS.abiflags section must be defined with the FP ABI flags set | ||
| 20 | * to 'any' to be able to link with both old and new libraries. | ||
| 21 | * Newer toolchains are capable of automatically generating this, but we want | ||
| 22 | * to work with older toolchains as well. Therefore, we define the contents of | ||
| 23 | * this section here (under different names), and then genvdso will patch | ||
| 24 | * it to have the correct name and type. | ||
| 25 | * | ||
| 26 | * We base the .MIPS.abiflags section on preprocessor definitions rather than | ||
| 27 | * CONFIG_* because we need to match the particular ABI we are building the | ||
| 28 | * VDSO for. | ||
| 29 | * | ||
| 30 | * See https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking | ||
| 31 | * for the .MIPS.abiflags section description. | ||
| 32 | */ | ||
| 33 | |||
| 34 | .section .mips_abiflags, "a" | ||
| 35 | .align 3 | ||
| 36 | __mips_abiflags: | ||
| 37 | .hword 0 /* version */ | ||
| 38 | .byte __mips /* isa_level */ | ||
| 39 | |||
| 40 | /* isa_rev */ | ||
| 41 | .byte MIPS_ISA_REV | ||
| 42 | |||
| 43 | /* gpr_size */ | ||
| 44 | #ifdef __mips64 | ||
| 45 | .byte 2 /* AFL_REG_64 */ | ||
| 46 | #else | ||
| 47 | .byte 1 /* AFL_REG_32 */ | ||
| 48 | #endif | ||
| 49 | |||
| 50 | /* cpr1_size */ | ||
| 51 | #if (MIPS_ISA_REV >= 6) || defined(__mips64) | ||
| 52 | .byte 2 /* AFL_REG_64 */ | ||
| 53 | #else | ||
| 54 | .byte 1 /* AFL_REG_32 */ | ||
| 55 | #endif | ||
| 56 | |||
| 57 | .byte 0 /* cpr2_size (AFL_REG_NONE) */ | ||
| 58 | .byte 0 /* fp_abi (Val_GNU_MIPS_ABI_FP_ANY) */ | ||
| 59 | .word 0 /* isa_ext */ | ||
| 60 | .word 0 /* ases */ | ||
| 61 | .word 0 /* flags1 */ | ||
| 62 | .word 0 /* flags2 */ | ||