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4352e2cc93
When libgcc is built with pac-ret, it requires to autenticate the
unwinding frame based on CFI information. The _dl_tlsdesc_dynamic
uses a custom calling convention, where it is responsible to save
and restore all registers it might use (even volatile).
The pac-ret support added by 1be3d6eb82
was added only on the slow-path, but the fast path also adds DWARF
Register Rule Instruction (cfi_adjust_cfa_offset) since it requires
to save/restore some auxiliary register. It seems that this is not
fully supported neither by libgcc nor AArch64 ABI [1].
Instead, move paciasp/autiasp to function prologue/epilogue to be
used on both fast and slow paths.
I also corrected the _dl_tlsdesc_dynamic comment description, it was
copied from i386 implementation without any adjustment.
Checked on aarch64-linux-gnu with a toolchain built with
--enable-standard-branch-protection on a system with pac-ret
support.
[1] https://github.com/ARM-software/abi-aa/blob/main/aadwarf64/aadwarf64.rst#id1
Reviewed-by: Yury Khrustalev <yury.khrustalev@arm.com>
161 lines
5.4 KiB
Makefile
161 lines
5.4 KiB
Makefile
ifeq ($(subdir),elf)
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tests += \
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tst-tlsdesc-pac \
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# tests
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modules-names += \
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tst-tlsdesc-pac-mod \
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# modules-names
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LDFLAGS-tst-tlsdesc-pac = -rdynamic
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$(objpfx)tst-tlsdesc-pac.out: $(objpfx)tst-tlsdesc-pac-mod.so
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endif
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ifeq ($(subdir),misc)
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sysdep_headers += sys/elf.h
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tests += \
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tst-aarch64-pkey \
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# tests
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ifneq (no,$(findstring no,$(have-cc-gcs) $(have-test-cc-gcs) $(have-ld-gcs)))
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gcs-tests-dynamic = \
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tst-gcs-disabled \
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tst-gcs-dlopen-disabled \
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tst-gcs-dlopen-enforced \
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tst-gcs-dlopen-optional-off \
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tst-gcs-dlopen-optional-on \
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tst-gcs-dlopen-override \
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tst-gcs-enforced \
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tst-gcs-enforced-abort \
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tst-gcs-noreturn \
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tst-gcs-optional-off \
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tst-gcs-optional-on \
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tst-gcs-override \
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tst-gcs-shared-disabled \
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tst-gcs-shared-enforced-abort \
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tst-gcs-shared-optional \
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tst-gcs-shared-override \
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# gcs-tests-dynamic
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gcs-tests-static = \
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tst-gcs-disabled-static \
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tst-gcs-enforced-static \
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tst-gcs-enforced-static-abort \
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tst-gcs-optional-static-off \
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tst-gcs-optional-static-on \
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tst-gcs-override-static \
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# gcs-tests-static
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tests += \
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$(gcs-tests-dynamic) \
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$(gcs-tests-static) \
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# tests
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tests-static += \
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$(gcs-tests-static) \
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# tests-static
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define run-gcs-abort-test
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$(test-wrapper-env) $(run-program-env) \
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$(tst-gcs-$*-abort-ENV) $(host-test-program-cmd)
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endef
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$(objpfx)tst-gcs-%-abort.out: $(..)sysdeps/unix/sysv/linux/aarch64/tst-gcs-abort.sh \
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$(objpfx)tst-gcs-%-abort
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$(SHELL) $< $(common-objpfx) $(test-name) '$(run-gcs-abort-test)'; \
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$(evaluate-test)
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LDFLAGS-tst-gcs-disabled += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-enforced += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-enforced-abort += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-optional-on += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-optional-off += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-override += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-disabled-static += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-enforced-static += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-enforced-static-abort += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-optional-static-on += -Wl,-z gcs=always
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LDFLAGS-tst-gcs-optional-static-off += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-override-static += -Wl,-z gcs=never
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tst-gcs-disabled-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=0
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tst-gcs-enforced-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-enforced-abort-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-optional-on-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-optional-off-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-override-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=3
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tst-gcs-disabled-static-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=0
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tst-gcs-enforced-static-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-enforced-static-abort-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-optional-static-on-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-optional-static-off-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-override-static-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=3
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# force one of the dependencies to be unmarked
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LDFLAGS-tst-gcs-mod2.so += -Wl,-z gcs=never
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LDFLAGS-tst-gcs-shared-disabled = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-shared-enforced-abort = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-shared-optional = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-shared-override = -Wl,-z gcs=always
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modules-names += \
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tst-gcs-mod1 \
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tst-gcs-mod2 \
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tst-gcs-mod3 \
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# modules-names
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$(objpfx)tst-gcs-shared-disabled: $(objpfx)tst-gcs-mod1.so $(objpfx)tst-gcs-mod3.so
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$(objpfx)tst-gcs-shared-enforced-abort: $(objpfx)tst-gcs-mod1.so $(objpfx)tst-gcs-mod3.so
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$(objpfx)tst-gcs-shared-optional: $(objpfx)tst-gcs-mod1.so $(objpfx)tst-gcs-mod3.so
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$(objpfx)tst-gcs-shared-override: $(objpfx)tst-gcs-mod1.so $(objpfx)tst-gcs-mod3.so
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$(objpfx)tst-gcs-mod1.so: $(objpfx)tst-gcs-mod2.so
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tst-gcs-shared-disabled-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=0
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tst-gcs-shared-enforced-abort-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-shared-optional-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-shared-override-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=3
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LDFLAGS-tst-gcs-dlopen-disabled = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-dlopen-enforced = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-dlopen-optional-on = -Wl,-z gcs=always
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LDFLAGS-tst-gcs-dlopen-optional-off = -Wl,-z gcs=never
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LDFLAGS-tst-gcs-dlopen-override = -Wl,-z gcs=always
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tst-gcs-dlopen-disabled-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=0
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tst-gcs-dlopen-enforced-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=1
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tst-gcs-dlopen-optional-on-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-dlopen-optional-off-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=2
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tst-gcs-dlopen-override-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=3
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$(objpfx)tst-gcs-dlopen-disabled.out: $(objpfx)tst-gcs-mod2.so
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$(objpfx)tst-gcs-dlopen-enforced.out: $(objpfx)tst-gcs-mod2.so
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$(objpfx)tst-gcs-dlopen-optional-on.out: $(objpfx)tst-gcs-mod2.so
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$(objpfx)tst-gcs-dlopen-optional-off.out: $(objpfx)tst-gcs-mod2.so
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$(objpfx)tst-gcs-dlopen-override.out: $(objpfx)tst-gcs-mod2.so
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LDFLAGS-tst-gcs-noreturn = -Wl,-z gcs=always
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tst-gcs-noreturn-ENV = GLIBC_TUNABLES=glibc.cpu.aarch64_gcs=0
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endif # ifeq ($(have-test-cc-gcs),yes)
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endif # ifeq ($(subdir),misc)
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ifeq ($(subdir),stdlib)
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gen-as-const-headers += ucontext_i.sym
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endif
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abi-variants := lp64
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abi-variants += lp64_be
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ifeq (,$(filter $(default-abi),$(abi-variants)))
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Unknown ABI, must be one of $(abi-variants)
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endif
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abi-lp64-condition := !defined __AARCH64EB__
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abi-lp64_be-condition := defined __AARCH64EB__
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