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vdso.h

/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2015 Imagination Technologies * Author: Alex Smith <alex.smith@imgtec.com> */ #include <asm/sgidefs.h> #ifndef __ASSEMBLY__ #include <asm/asm.h> #include <asm/page.h> #include <asm/vdso.h> static inline unsigned long get_vdso_base(void) { unsigned long addr; /* * We can't use cpu_has_mips_r6 since it needs the cpu_data[] * kernel symbol. */ #ifdef CONFIG_CPU_MIPSR6 /* * lapc <symbol> is an alias to addiupc reg, <symbol> - . * * We can't use addiupc because there is no label-label * support for the addiupc reloc */ __asm__("lapc %0, _start \n" : "=r" (addr) : :); #else /* * Get the base load address of the VDSO. We have to avoid generating * relocations and references to the GOT because ld.so does not perform * relocations on the VDSO. We use the current offset from the VDSO base * and perform a PC-relative branch which gives the absolute address in * ra, and take the difference. The assembler chokes on * "li %0, _start - .", so embed the offset as a word and branch over * it. * */ __asm__( " .set push \n" " .set noreorder \n" " bal 1f \n" " nop \n" " .word _start - . \n" "1: lw %0, 0($31) \n" " " STR(PTR_ADDU) " %0, $31, %0 \n" " .set pop \n" : "=r" (addr) : : "$31"); #endif /* CONFIG_CPU_MIPSR6 */ return addr; } static inline const struct vdso_data *get_vdso_data(void) { return (const struct vdso_data *)(get_vdso_base() - PAGE_SIZE); } #ifdef CONFIG_CLKSRC_MIPS_GIC static inline void __iomem *get_gic(const struct vdso_data *data) { return (void __iomem *)((unsigned long)data & PAGE_MASK) - PAGE_SIZE; } #endif /* CONFIG_CLKSRC_MIPS_GIC */ #endif /* __ASSEMBLY__ */

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docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

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curdir: /usr/src/linux-headers-6.8.0-100/arch/mips/include/asm/vdso

	.		4096
	..		12288
X	clocksource.h		225
X	gettimeofday.h		5295
X	processor.h		745
X	vdso.h		1753
X	vsyscall.h		632