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-rw-r--r--arch/mips/vdso/elf.S62
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diff --git a/arch/mips/vdso/elf.S b/arch/mips/vdso/elf.S
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Alex Smith <alex.smith@imgtec.com>
+ */
+
+#include <asm/vdso/vdso.h>
+
+#include <asm/isa-rev.h>
+
+#include <linux/elfnote.h>
+#include <linux/version.h>
+
+ELFNOTE_START(Linux, 0, "a")
+ .long LINUX_VERSION_CODE
+ELFNOTE_END
+
+/*
+ * The .MIPS.abiflags section must be defined with the FP ABI flags set
+ * to 'any' to be able to link with both old and new libraries.
+ * Newer toolchains are capable of automatically generating this, but we want
+ * to work with older toolchains as well. Therefore, we define the contents of
+ * this section here (under different names), and then genvdso will patch
+ * it to have the correct name and type.
+ *
+ * We base the .MIPS.abiflags section on preprocessor definitions rather than
+ * CONFIG_* because we need to match the particular ABI we are building the
+ * VDSO for.
+ *
+ * See https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking
+ * for the .MIPS.abiflags section description.
+ */
+
+ .section .mips_abiflags, "a"
+ .align 3
+__mips_abiflags:
+ .hword 0 /* version */
+ .byte __mips /* isa_level */
+
+ /* isa_rev */
+ .byte MIPS_ISA_REV
+
+ /* gpr_size */
+#ifdef __mips64
+ .byte 2 /* AFL_REG_64 */
+#else
+ .byte 1 /* AFL_REG_32 */
+#endif
+
+ /* cpr1_size */
+#if (MIPS_ISA_REV >= 6) || defined(__mips64)
+ .byte 2 /* AFL_REG_64 */
+#else
+ .byte 1 /* AFL_REG_32 */
+#endif
+
+ .byte 0 /* cpr2_size (AFL_REG_NONE) */
+ .byte 0 /* fp_abi (Val_GNU_MIPS_ABI_FP_ANY) */
+ .word 0 /* isa_ext */
+ .word 0 /* ases */
+ .word 0 /* flags1 */
+ .word 0 /* flags2 */