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glibc/sysdeps/x86/Makefile
Adhemerval Zanella 2a969b53c0 elf: Do not duplicate the GLIBC_TUNABLES string 
The tunable parsing duplicates the tunable environment variable so it
null-terminates each one since it simplifies the later parsing. It has
the drawback of adding another point of failure (__minimal_malloc
failing), and the memory copy requires tuning the compiler to avoid mem
operations calls.

The parsing now tracks the tunable start and its size. The
dl-tunable-parse.h adds helper functions to help parsing, like a strcmp
that also checks for size and an iterator for suboptions that are
comma-separated (used on hwcap parsing by x86, powerpc, and s390x).

Since the environment variable is allocated on the stack by the kernel,
it is safe to keep the references to the suboptions for later parsing
of string tunables (as done by set_hwcaps by multiple architectures).

Checked on x86_64-linux-gnu, powerpc64le-linux-gnu, and
aarch64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2023-12-19 13:25:45 -03:00

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ifeq ($(subdir),csu)
gen-as-const-headers += cpu-features-offsets.sym
endif
ifeq ($(subdir),elf)
sysdep_routines += get-cpuid-feature-leaf
sysdep-dl-routines += dl-get-cpu-features
sysdep_headers += sys/platform/x86.h bits/platform/x86.h
CFLAGS-dl-get-cpu-features.os += $(rtld-early-cflags)
CFLAGS-get-cpuid-feature-leaf.o += $(no-stack-protector)
tests += \
tst-get-cpu-features \
tst-get-cpu-features-static \
tst-cpu-features-cpuinfo \
tst-cpu-features-cpuinfo-static \
tst-cpu-features-supports \
tst-cpu-features-supports-static \
tst-hwcap-tunables \
# tests
tests-static += \
tst-get-cpu-features-static \
tst-cpu-features-cpuinfo-static \
tst-cpu-features-supports-static \
# tests-static
ifeq (yes,$(have-ifunc))
ifeq (yes,$(have-gcc-ifunc))
tests += \
tst-ifunc-isa-1 \
tst-ifunc-isa-1-static \
# tests
tests-static += \
tst-ifunc-isa-1-static \
# tests-static
test-xfail-tst-ifunc-isa-1 = $(with-lld)
test-xfail-tst-ifunc-isa-1-static = $(with-lld)
tests += \
tst-ifunc-isa-2 \
tst-ifunc-isa-2-static \
# tests
tests-static += \
tst-ifunc-isa-2-static \
# tests-static
test-xfail-tst-ifunc-isa-2 = $(with-lld)
test-xfail-tst-ifunc-isa-2-static = $(with-lld)
endif
endif
ifeq (yes,$(enable-x86-isa-level))
tests += \
tst-isa-level-1 \
# tests
modules-names += \
tst-isa-level-mod-1-baseline \
tst-isa-level-mod-1-v2 \
tst-isa-level-mod-1-v3 \
tst-isa-level-mod-1-v4 \
# modules-names
# X86 ISA level baseline
CFLAGS-tst-isa-level-mod-1-baseline.c += -DINCLUDE_X86_ISA_LEVEL \
-DISA_LEVEL=0x1 \
-march=x86-64
# X86 ISA level v2
CFLAGS-tst-isa-level-mod-1-v2.c += -DINCLUDE_X86_ISA_LEVEL \
-DISA_LEVEL=0x3 \
-march=x86-64
# X86 ISA level v3
CFLAGS-tst-isa-level-mod-1-v3.c += -DINCLUDE_X86_ISA_LEVEL \
-DISA_LEVEL=0x7 \
-march=x86-64
# X86 ISA level v4
CFLAGS-tst-isa-level-mod-1-v4.c += -DINCLUDE_X86_ISA_LEVEL \
-DISA_LEVEL=0xf \
-march=x86-64
$(objpfx)tst-isa-level-1.out: $(objpfx)tst-isa-level-mod-1-baseline.so \
$(objpfx)tst-isa-level-mod-1-v2.so \
$(objpfx)tst-isa-level-mod-1-v3.so \
$(objpfx)tst-isa-level-mod-1-v4.so
endif
tst-ifunc-isa-2-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SSE4_2,-AVX,-AVX2,-AVX512F
tst-ifunc-isa-2-static-ENV = $(tst-ifunc-isa-2-ENV)
tst-hwcap-tunables-ARGS = -- $(host-test-program-cmd)
endif
ifeq ($(subdir),math)
tests += \
tst-ldbl-nonnormal-printf \
# tests
endif # $(subdir) == math
ifeq ($(subdir),setjmp)
gen-as-const-headers += jmp_buf-ssp.sym
sysdep_routines += __longjmp_cancel
ifneq ($(enable-cet),no)
tests += \
tst-setjmp-cet \
# tests
tst-setjmp-cet-ENV = GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on
endif
endif
ifeq ($(subdir),string)
sysdep_routines += cacheinfo
tests += \
tst-memchr-rtm \
tst-memcmp-rtm \
tst-memmove-rtm \
tst-memrchr-rtm \
tst-memset-rtm \
tst-strcasecmp-rtm \
tst-strchr-rtm \
tst-strcmp-rtm \
tst-strcpy-rtm \
tst-strlen-rtm \
tst-strncasecmp-rtm \
tst-strncmp-rtm \
tst-strrchr-rtm \
tst-wcscmp-rtm \
tst-wcsncmp-rtm \
# tests
CFLAGS-tst-memchr-rtm.c += -mrtm
CFLAGS-tst-memcmp-rtm.c += -mrtm
CFLAGS-tst-memmove-rtm.c += -mrtm
CFLAGS-tst-memrchr-rtm.c += -mrtm
CFLAGS-tst-memset-rtm.c += -mrtm
CFLAGS-tst-strcasecmp-rtm.c += -mrtm
CFLAGS-tst-strchr-rtm.c += -mrtm
CFLAGS-tst-strcmp-rtm.c += -mrtm
CFLAGS-tst-strcpy-rtm.c += -mrtm
CFLAGS-tst-strlen-rtm.c += -mrtm
CFLAGS-tst-strncasecmp-rtm.c += -mrtm -Wno-error
CFLAGS-tst-strncmp-rtm.c += -mrtm -Wno-error
CFLAGS-tst-strrchr-rtm.c += -mrtm
CFLAGS-tst-wcscmp-rtm.c += -mrtm
CFLAGS-tst-wcsncmp-rtm.c += -mrtm -Wno-error
endif
ifneq ($(enable-cet),no)
ifeq ($(subdir),elf)
sysdep-dl-routines += dl-cet
tests += \
tst-cet-legacy-1 \
tst-cet-legacy-1a \
tst-cet-legacy-2 \
tst-cet-legacy-2a \
tst-cet-legacy-3 \
tst-cet-legacy-4 \
tst-cet-legacy-5a \
tst-cet-legacy-6a \
tst-cet-legacy-7 \
tst-cet-legacy-8 \
tst-cet-legacy-9 \
tst-cet-legacy-9-static \
tst-cet-legacy-10 \
tst-cet-legacy-10-static \
tst-cet-legacy-10a \
tst-cet-legacy-10a-static \
# tests
tests-static += \
tst-cet-legacy-9-static \
tst-cet-legacy-10-static \
tst-cet-legacy-10a-static \
# tests-static
tst-cet-legacy-1a-ARGS = -- $(host-test-program-cmd)
tests += \
tst-shstk-legacy-1a \
tst-shstk-legacy-1a-static \
tst-shstk-legacy-1b \
tst-shstk-legacy-1b-static \
tst-shstk-legacy-1c \
tst-shstk-legacy-1c-static \
tst-shstk-legacy-1d \
tst-shstk-legacy-1d-static \
tst-shstk-legacy-1e \
tst-shstk-legacy-1e-static \
tst-shstk-legacy-1f \
tst-shstk-legacy-1g \
# tests
modules-names += \
tst-shstk-legacy-mod-1 \
# modules-names
tests-static += \
tst-shstk-legacy-1a-static \
tst-shstk-legacy-1b-static \
tst-shstk-legacy-1c-static \
tst-shstk-legacy-1d-static \
tst-shstk-legacy-1e-static \
# tests-static
extra-objs += \
tst-shstk-legacy-1-extra.o \
# extra-objs
tests += \
tst-cet-legacy-4a \
tst-cet-legacy-4b \
tst-cet-legacy-4c \
tst-cet-legacy-5b \
tst-cet-legacy-6b \
# tests
modules-names += \
tst-cet-legacy-mod-1 \
tst-cet-legacy-mod-2 \
tst-cet-legacy-mod-4 \
tst-cet-legacy-mod-5a \
tst-cet-legacy-mod-5b \
tst-cet-legacy-mod-5c \
tst-cet-legacy-mod-6a \
tst-cet-legacy-mod-6b \
tst-cet-legacy-mod-6c \
# modules-names
CFLAGS-tst-cet-legacy-2.c += -fcf-protection=branch
CFLAGS-tst-cet-legacy-2a.c += -fcf-protection
CFLAGS-tst-cet-legacy-mod-1.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-mod-2.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-3.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-4.c += -fcf-protection=branch
CPPFLAGS-tst-cet-legacy-4a.c += -DCET_IS_PERMISSIVE=1
CFLAGS-tst-cet-legacy-4a.c += -fcf-protection
CFLAGS-tst-cet-legacy-4b.c += -fcf-protection
CFLAGS-tst-cet-legacy-mod-4.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-5a.c += -fcf-protection -mshstk
ifeq ($(enable-cet),permissive)
CPPFLAGS-tst-cet-legacy-5a.c += -DCET_IS_PERMISSIVE=1
endif
CFLAGS-tst-cet-legacy-5b.c += -fcf-protection -mshstk
CPPFLAGS-tst-cet-legacy-5b.c += -DCET_DISABLED_BY_ENV=1
CFLAGS-tst-cet-legacy-mod-5a.c += -fcf-protection=branch
CFLAGS-tst-cet-legacy-mod-5b.c += -fcf-protection
CFLAGS-tst-cet-legacy-mod-5c.c += -fcf-protection
CFLAGS-tst-cet-legacy-6a.c += -fcf-protection -mshstk
ifeq ($(enable-cet),permissive)
CPPFLAGS-tst-cet-legacy-6a.c += -DCET_IS_PERMISSIVE=1
endif
CFLAGS-tst-cet-legacy-6b.c += -fcf-protection -mshstk
CPPFLAGS-tst-cet-legacy-6b.c += -DCET_DISABLED_BY_ENV=1
CFLAGS-tst-cet-legacy-mod-6a.c += -fcf-protection=branch
CFLAGS-tst-cet-legacy-mod-6b.c += -fcf-protection
CFLAGS-tst-cet-legacy-mod-6c.c += -fcf-protection
CFLAGS-tst-cet-legacy-7.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-10.c += -mshstk
CFLAGS-tst-cet-legacy-10-static.c += -mshstk
CFLAGS-tst-cet-legacy-10a.c += -fcf-protection=none
CFLAGS-tst-cet-legacy-10a-static.c += -fcf-protection=none
CFLAGS-tst-shstk-legacy-1a.c += -fcf-protection=none
CFLAGS-tst-shstk-legacy-1a-static.c += -fcf-protection=none
CFLAGS-tst-shstk-legacy-1d.c += -fcf-protection=none
CFLAGS-tst-shstk-legacy-1d-static.c += -fcf-protection=none
CFLAGS-tst-shstk-legacy-1f.c += -fcf-protection=none
$(objpfx)tst-cet-legacy-1: $(objpfx)tst-cet-legacy-mod-1.so \
$(objpfx)tst-cet-legacy-mod-2.so
$(objpfx)tst-cet-legacy-1a: $(objpfx)tst-cet-legacy-mod-1.so \
$(objpfx)tst-cet-legacy-mod-2.so
$(objpfx)tst-cet-legacy-2: $(objpfx)tst-cet-legacy-mod-2.so
$(objpfx)tst-cet-legacy-2.out: $(objpfx)tst-cet-legacy-mod-1.so
$(objpfx)tst-cet-legacy-2a: $(objpfx)tst-cet-legacy-mod-2.so
$(objpfx)tst-cet-legacy-2a.out: $(objpfx)tst-cet-legacy-mod-1.so
$(objpfx)tst-cet-legacy-4.out: $(objpfx)tst-cet-legacy-mod-4.so
$(objpfx)tst-cet-legacy-5a.out: $(objpfx)tst-cet-legacy-mod-5a.so \
$(objpfx)tst-cet-legacy-mod-5b.so
$(objpfx)tst-cet-legacy-mod-5a.so: $(objpfx)tst-cet-legacy-mod-5c.so
$(objpfx)tst-cet-legacy-mod-5b.so: $(objpfx)tst-cet-legacy-mod-5c.so
$(objpfx)tst-cet-legacy-6a.out: $(objpfx)tst-cet-legacy-mod-6a.so \
$(objpfx)tst-cet-legacy-mod-6b.so
$(objpfx)tst-cet-legacy-mod-6a.so: $(objpfx)tst-cet-legacy-mod-6c.so
$(objpfx)tst-cet-legacy-mod-6b.so: $(objpfx)tst-cet-legacy-mod-6c.so
LDFLAGS-tst-cet-legacy-mod-6c.so = -Wl,--enable-new-dtags,-z,nodelete
$(objpfx)tst-cet-legacy-4a.out: $(objpfx)tst-cet-legacy-mod-4.so
tst-cet-legacy-4a-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=permissive
$(objpfx)tst-cet-legacy-4b.out: $(objpfx)tst-cet-legacy-mod-4.so
tst-cet-legacy-4b-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=on
$(objpfx)tst-cet-legacy-4c.out: $(objpfx)tst-cet-legacy-mod-4.so
tst-cet-legacy-4c-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=off
$(objpfx)tst-cet-legacy-5b.out: $(objpfx)tst-cet-legacy-mod-5a.so \
$(objpfx)tst-cet-legacy-mod-5b.so
tst-cet-legacy-5b-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK
$(objpfx)tst-cet-legacy-6b.out: $(objpfx)tst-cet-legacy-mod-6a.so \
$(objpfx)tst-cet-legacy-mod-6b.so
tst-cet-legacy-6b-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK
tst-cet-legacy-9-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK
tst-cet-legacy-9-static-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK
$(objpfx)tst-shstk-legacy-1a: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1a-static: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1b: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1b-static: $(objpfx)tst-shstk-legacy-1-extra.o
tst-shstk-legacy-1c-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
tst-shstk-legacy-1c-static-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
$(objpfx)tst-shstk-legacy-1c: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1c-static: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1d: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1d-static: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1e: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1e-static: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1e.out: \
$(..)/sysdeps/x86/tst-shstk-legacy-1e.sh $(objpfx)tst-shstk-legacy-1e
$(SHELL) $< $(common-objpfx) '$(test-program-prefix)' 2> $@; \
$(evaluate-test)
$(objpfx)tst-shstk-legacy-1e-static.out: \
$(..)/sysdeps/x86/tst-shstk-legacy-1e-static.sh \
$(objpfx)tst-shstk-legacy-1e-static
$(SHELL) $< $(common-objpfx) 2> $@; \
$(evaluate-test)
$(objpfx)tst-shstk-legacy-1f: $(objpfx)tst-shstk-legacy-mod-1.so
$(objpfx)tst-shstk-legacy-mod-1.so: \
$(objpfx)tst-shstk-legacy-mod-1.os \
$(objpfx)tst-shstk-legacy-1-extra.os
$(objpfx)tst-shstk-legacy-1g: $(objpfx)tst-shstk-legacy-mod-1.so
$(objpfx)tst-shstk-legacy-1g.out: \
$(..)/sysdeps/x86/tst-shstk-legacy-1g.sh $(objpfx)tst-shstk-legacy-1g
$(SHELL) $< $(common-objpfx) '$(test-program-prefix)' 2> $@; \
$(evaluate-test)
endif
# Add -fcf-protection to CFLAGS when CET is enabled.
CFLAGS-.o += -fcf-protection
CFLAGS-.os += -fcf-protection
CFLAGS-.op += -fcf-protection
CFLAGS-.oS += -fcf-protection
# Compile assembly codes with <cet.h> when CET is enabled.
asm-CPPFLAGS += -fcf-protection -include cet.h
ifeq ($(subdir),elf)
ifeq (yes,$(build-shared))
tests-special += $(objpfx)check-cet.out
endif
# FIXME: Can't use all-built-dso in elf/Makefile since this file is
# processed before elf/Makefile. Duplicate it here.
cet-built-dso := $(common-objpfx)elf/ld.so $(common-objpfx)libc.so \
$(filter-out $(common-objpfx)linkobj/libc.so, \
$(sort $(wildcard $(addprefix $(common-objpfx), \
*/lib*.so \
iconvdata/*.so))))
$(cet-built-dso:=.note): %.note: %
@rm -f $@T
LC_ALL=C $(READELF) -n $< > $@T
test -s $@T
mv -f $@T $@
common-generated += $(cet-built-dso:$(common-objpfx)%=%.note)
$(objpfx)check-cet.out: $(..)sysdeps/x86/check-cet.awk \
$(cet-built-dso:=.note)
LC_ALL=C $(AWK) -f $^ > $@; \
$(evaluate-test)
generated += check-cet.out
endif
endif
ifeq ($(subdir),posix)
tests += \
tst-sysconf-cache-linesize \
tst-sysconf-cache-linesize-static \
# tests
tests-static += \
tst-sysconf-cache-linesize-static \
# tests-static
endif
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