lib/vdso/Makefile.include

Source file repositories/reference/linux-study-clean/lib/vdso/Makefile.include

File Facts

System
Linux kernel
Corpus path
lib/vdso/Makefile.include
Extension
.include
Size
845 bytes
Lines
19
Domain
Kernel Services
Bucket
lib
Inferred role
Kernel Services: build/configuration rule
Status
atlas-only

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0

GENERIC_VDSO_MK_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
GENERIC_VDSO_DIR := $(dir $(GENERIC_VDSO_MK_PATH))

c-gettimeofday-$(CONFIG_GENERIC_GETTIMEOFDAY) := $(addprefix $(GENERIC_VDSO_DIR), gettimeofday.c)
c-getrandom-$(CONFIG_VDSO_GETRANDOM) := $(addprefix $(GENERIC_VDSO_DIR), getrandom.c)

# This cmd checks that the vdso library does not contain dynamic relocations.
# It has to be called after the linking of the vdso library and requires it
# as a parameter.
#
# As a workaround for some GNU ld ports which produce unneeded R_*_NONE
# dynamic relocations, ignore R_*_NONE.
quiet_cmd_vdso_check = VDSOCHK $@
      cmd_vdso_check = if $(READELF) -rW $@ | grep -v _NONE | grep -q " R_\w*_"; \
		       then (echo >&2 "$@: dynamic relocations are not supported"; \
			     rm -f $@; /bin/false); fi

Annotation

Implementation Notes