powerpc/vdso: Merge vdso64 and vdso32 into a single directory
merge vdso64 into vdso32 and rename it vdso. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4dbe05cc130f6a0858d09ac72e436c373cb08b70.1642782130.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
Michael Ellerman
parent
d88378d8d2
commit
fd1feade75
@ -421,9 +421,9 @@ ifeq ($(KBUILD_EXTMOD),)
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prepare: vdso_prepare
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vdso_prepare: prepare0
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$(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
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$(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h)
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$(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
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$(if $(CONFIG_PPC64),$(Q)$(MAKE) \
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$(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h)
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$(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
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endif
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archprepare: checkbin
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@ -194,8 +194,8 @@ targets += prom_init_check
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clean-files := vmlinux.lds
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# Force dependency (incbin is bad)
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$(obj)/vdso32_wrapper.o : $(obj)/vdso32/vdso32.so.dbg
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$(obj)/vdso64_wrapper.o : $(obj)/vdso64/vdso64.so.dbg
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$(obj)/vdso32_wrapper.o : $(obj)/vdso/vdso32.so.dbg
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$(obj)/vdso64_wrapper.o : $(obj)/vdso/vdso64.so.dbg
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# for cleaning
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subdir- += vdso32 vdso64
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subdir- += vdso
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@ -1,3 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0-only
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vdso32.lds
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vdso32.so.dbg
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vdso64.lds
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vdso64.so.dbg
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@ -6,6 +6,7 @@ ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_
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include $(srctree)/lib/vdso/Makefile
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obj-vdso32 = sigtramp32-32.o gettimeofday-32.o datapage-32.o cacheflush-32.o note-32.o getcpu-32.o
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obj-vdso64 = sigtramp64-64.o gettimeofday-64.o datapage-64.o cacheflush-64.o note-64.o getcpu-64.o
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ifneq ($(c-gettimeofday-y),)
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CFLAGS_vgettimeofday-32.o += -include $(c-gettimeofday-y)
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@ -15,6 +16,17 @@ ifneq ($(c-gettimeofday-y),)
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CFLAGS_vgettimeofday-32.o += -ffreestanding -fasynchronous-unwind-tables
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CFLAGS_REMOVE_vgettimeofday-32.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_vgettimeofday-32.o += -mcmodel=medium -mabi=elfv1 -mabi=elfv2 -mcall-aixdesc
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CFLAGS_vgettimeofday-64.o += -include $(c-gettimeofday-y)
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CFLAGS_vgettimeofday-64.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_vgettimeofday-64.o += $(call cc-option, -fno-stack-protector)
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CFLAGS_vgettimeofday-64.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_vgettimeofday-64.o += -ffreestanding -fasynchronous-unwind-tables
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CFLAGS_REMOVE_vgettimeofday-64.o = $(CC_FLAGS_FTRACE)
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# Go prior to 1.16.x assumes r30 is not clobbered by any VDSO code. That used to be true
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# by accident when the VDSO was hand-written asm code, but may not be now that the VDSO is
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# compiler generated. To avoid breaking Go tell GCC not to use r30. Impact on code
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# generation is minimal, it will just use r29 instead.
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CFLAGS_vgettimeofday-64.o += $(call cc-option, -ffixed-r30)
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endif
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# Build rules
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@ -27,6 +39,8 @@ endif
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targets := $(obj-vdso32) vdso32.so.dbg vgettimeofday-32.o
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obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
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targets += $(obj-vdso64) vdso64.so.dbg vgettimeofday-64.o
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
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GCOV_PROFILE := n
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KCOV_INSTRUMENT := n
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@ -38,26 +52,42 @@ ccflags-y := -shared -fno-common -fno-builtin -nostdlib -Wl,--hash-style=both
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CC32FLAGS := -Wl,-soname=linux-vdso32.so.1 -m32
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AS32FLAGS := -D__VDSO32__ -s
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CC64FLAGS := -Wl,-soname=linux-vdso64.so.1
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AS64FLAGS := -D__VDSO64__ -s
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targets += vdso32.lds
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CPPFLAGS_vdso32.lds += -P -C -Upowerpc
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targets += vdso64.lds
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o FORCE
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$(call if_changed,vdso32ld_and_check)
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o FORCE
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$(call if_changed,vdso64ld_and_check)
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# assembly rules for the .S files
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$(obj-vdso32): %-32.o: %.S FORCE
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$(call if_changed_dep,vdso32as)
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$(obj)/vgettimeofday-32.o: %-32.o: %.c FORCE
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$(call if_changed_dep,vdso32cc)
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$(obj-vdso64): %-64.o: %.S FORCE
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$(call if_changed_dep,vdso64as)
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$(obj)/vgettimeofday-64.o: %-64.o: %.c FORCE
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$(call if_changed_dep,cc_o_c)
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# Generate VDSO offsets using helper script
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gen-vdso32sym := $(srctree)/$(src)/gen_vdso32_offsets.sh
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quiet_cmd_vdso32sym = VDSO32SYM $@
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cmd_vdso32sym = $(NM) $< | $(gen-vdso32sym) | LC_ALL=C sort > $@
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gen-vdso64sym := $(srctree)/$(src)/gen_vdso64_offsets.sh
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quiet_cmd_vdso64sym = VDSO64SYM $@
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cmd_vdso64sym = $(NM) $< | $(gen-vdso64sym) | LC_ALL=C sort > $@
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include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
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$(call if_changed,vdso32sym)
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include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
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$(call if_changed,vdso64sym)
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# actual build commands
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quiet_cmd_vdso32ld_and_check = VDSO32L $@
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@ -66,3 +96,8 @@ quiet_cmd_vdso32as = VDSO32A $@
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cmd_vdso32as = $(VDSOCC) $(a_flags) $(CC32FLAGS) $(AS32FLAGS) -c -o $@ $<
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quiet_cmd_vdso32cc = VDSO32C $@
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cmd_vdso32cc = $(VDSOCC) $(c_flags) $(CC32FLAGS) -c -o $@ $<
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quiet_cmd_vdso64ld_and_check = VDSO64L $@
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cmd_vdso64ld_and_check = $(VDSOCC) $(c_flags) $(CC64FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) ; $(cmd_vdso_check)
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quiet_cmd_vdso64as = VDSO64A $@
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cmd_vdso64as = $(VDSOCC) $(a_flags) $(CC64FLAGS) $(AS64FLAGS) -c -o $@ $<
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@ -7,7 +7,7 @@
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.globl vdso32_start, vdso32_end
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.balign PAGE_SIZE
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vdso32_start:
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.incbin "arch/powerpc/kernel/vdso32/vdso32.so.dbg"
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.incbin "arch/powerpc/kernel/vdso/vdso32.so.dbg"
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.balign PAGE_SIZE
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vdso32_end:
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3
arch/powerpc/kernel/vdso64/.gitignore
vendored
3
arch/powerpc/kernel/vdso64/.gitignore
vendored
@ -1,3 +0,0 @@
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# SPDX-License-Identifier: GPL-2.0-only
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vdso64.lds
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vdso64.so.dbg
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@ -1,56 +0,0 @@
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# SPDX-License-Identifier: GPL-2.0
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# List of files in the vdso, has to be asm only for now
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ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_PPC_ADDR16|R_PPC_ADDR16_LO|R_PPC_ADDR16_HI|R_PPC_ADDR16_HA|R_PPC_ADDR14|R_PPC_ADDR14_BRTAKEN|R_PPC_ADDR14_BRNTAKEN|R_PPC_REL24
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include $(srctree)/lib/vdso/Makefile
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obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
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ifneq ($(c-gettimeofday-y),)
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CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
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CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector)
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CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables
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CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
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endif
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# Build rules
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targets := $(obj-vdso64) vdso64.so.dbg vgettimeofday.o
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
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GCOV_PROFILE := n
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KCOV_INSTRUMENT := n
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UBSAN_SANITIZE := n
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KASAN_SANITIZE := n
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ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
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-Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both
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# Go prior to 1.16.x assumes r30 is not clobbered by any VDSO code. That used to be true
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# by accident when the VDSO was hand-written asm code, but may not be now that the VDSO is
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# compiler generated. To avoid breaking Go tell GCC not to use r30. Impact on code
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# generation is minimal, it will just use r29 instead.
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ccflags-y += $(call cc-option, -ffixed-r30)
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asflags-y := -D__VDSO64__ -s
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targets += vdso64.lds
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday.o FORCE
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$(call if_changed,vdso64ld_and_check)
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# Generate VDSO offsets using helper script
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gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
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quiet_cmd_vdsosym = VDSOSYM $@
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cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
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include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
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$(call if_changed,vdsosym)
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# actual build commands
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quiet_cmd_vdso64ld_and_check = VDSO64L $@
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cmd_vdso64ld_and_check = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^); $(cmd_vdso_check)
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@ -1,75 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* vDSO provided cache flush routines
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*
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* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
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* IBM Corp.
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*/
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/vdso.h>
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#include <asm/vdso_datapage.h>
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#include <asm/asm-offsets.h>
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.text
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/*
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* Default "generic" version of __kernel_sync_dicache.
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*
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* void __kernel_sync_dicache(unsigned long start, unsigned long end)
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*
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* Flushes the data cache & invalidate the instruction cache for the
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* provided range [start, end[
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*/
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V_FUNCTION_BEGIN(__kernel_sync_dicache)
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.cfi_startproc
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BEGIN_FTR_SECTION
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b 3f
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END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
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mflr r12
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.cfi_register lr,r12
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get_datapage r10
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mtlr r12
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.cfi_restore lr
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lwz r7,CFG_DCACHE_BLOCKSZ(r10)
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addi r5,r7,-1
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andc r6,r3,r5 /* round low to line bdy */
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subf r8,r6,r4 /* compute length */
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add r8,r8,r5 /* ensure we get enough */
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lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10)
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srd. r8,r8,r9 /* compute line count */
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crclr cr0*4+so
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beqlr /* nothing to do? */
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mtctr r8
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1: dcbst 0,r6
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add r6,r6,r7
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bdnz 1b
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sync
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/* Now invalidate the instruction cache */
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lwz r7,CFG_ICACHE_BLOCKSZ(r10)
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addi r5,r7,-1
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andc r6,r3,r5 /* round low to line bdy */
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subf r8,r6,r4 /* compute length */
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add r8,r8,r5
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lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10)
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srd. r8,r8,r9 /* compute line count */
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crclr cr0*4+so
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beqlr /* nothing to do? */
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mtctr r8
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2: icbi 0,r6
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add r6,r6,r7
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bdnz 2b
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isync
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li r3,0
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blr
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3:
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crclr cr0*4+so
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sync
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isync
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li r3,0
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blr
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.cfi_endproc
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V_FUNCTION_END(__kernel_sync_dicache)
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@ -1,59 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Access to the shared data page by the vDSO & syscall map
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*
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* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), IBM Corp.
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*/
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/unistd.h>
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#include <asm/vdso.h>
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#include <asm/vdso_datapage.h>
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.text
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/*
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* void *__kernel_get_syscall_map(unsigned int *syscall_count) ;
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*
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* returns a pointer to the syscall map. the map is agnostic to the
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* size of "long", unlike kernel bitops, it stores bits from top to
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* bottom so that memory actually contains a linear bitmap
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* check for syscall N by testing bit (0x80000000 >> (N & 0x1f)) of
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* 32 bits int at N >> 5.
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*/
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V_FUNCTION_BEGIN(__kernel_get_syscall_map)
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.cfi_startproc
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mflr r12
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.cfi_register lr,r12
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mr r4,r3
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get_datapage r3
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mtlr r12
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addi r3,r3,CFG_SYSCALL_MAP64
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cmpldi cr0,r4,0
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crclr cr0*4+so
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beqlr
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li r0,NR_syscalls
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stw r0,0(r4)
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blr
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.cfi_endproc
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V_FUNCTION_END(__kernel_get_syscall_map)
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/*
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* void unsigned long __kernel_get_tbfreq(void);
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*
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* returns the timebase frequency in HZ
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*/
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V_FUNCTION_BEGIN(__kernel_get_tbfreq)
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.cfi_startproc
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mflr r12
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.cfi_register lr,r12
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get_datapage r3
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ld r3,CFG_TB_TICKS_PER_SEC(r3)
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mtlr r12
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crclr cr0*4+so
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blr
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.cfi_endproc
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V_FUNCTION_END(__kernel_get_tbfreq)
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@ -1,33 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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*
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* Copyright (C) IBM Corporation, 2012
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*
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* Author: Anton Blanchard <anton@au.ibm.com>
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*/
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#include <asm/ppc_asm.h>
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#include <asm/vdso.h>
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.text
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/*
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* Exact prototype of getcpu
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*
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* int __kernel_getcpu(unsigned *cpu, unsigned *node);
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*
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*/
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V_FUNCTION_BEGIN(__kernel_getcpu)
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.cfi_startproc
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mfspr r5,SPRN_SPRG_VDSO_READ
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cmpdi cr0,r3,0
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cmpdi cr1,r4,0
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clrlwi r6,r5,16
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rlwinm r7,r5,16,31-15,31-0
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beq cr0,1f
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stw r6,0(r3)
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1: beq cr1,2f
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stw r7,0(r4)
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2: crclr cr0*4+so
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li r3,0 /* always success */
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blr
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.cfi_endproc
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V_FUNCTION_END(__kernel_getcpu)
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@ -1,58 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Userland implementation of gettimeofday() for 64 bits processes in a
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* ppc64 kernel for use in the vDSO
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*
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* Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
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* IBM Corp.
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*/
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/vdso.h>
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#include <asm/vdso_datapage.h>
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#include <asm/asm-offsets.h>
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#include <asm/unistd.h>
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#include <asm/vdso/gettimeofday.h>
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.text
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/*
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* Exact prototype of gettimeofday
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||||
*
|
||||
* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
|
||||
*
|
||||
*/
|
||||
V_FUNCTION_BEGIN(__kernel_gettimeofday)
|
||||
cvdso_call __c_kernel_gettimeofday
|
||||
V_FUNCTION_END(__kernel_gettimeofday)
|
||||
|
||||
|
||||
/*
|
||||
* Exact prototype of clock_gettime()
|
||||
*
|
||||
* int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp);
|
||||
*
|
||||
*/
|
||||
V_FUNCTION_BEGIN(__kernel_clock_gettime)
|
||||
cvdso_call __c_kernel_clock_gettime
|
||||
V_FUNCTION_END(__kernel_clock_gettime)
|
||||
|
||||
|
||||
/*
|
||||
* Exact prototype of clock_getres()
|
||||
*
|
||||
* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res);
|
||||
*
|
||||
*/
|
||||
V_FUNCTION_BEGIN(__kernel_clock_getres)
|
||||
cvdso_call __c_kernel_clock_getres
|
||||
V_FUNCTION_END(__kernel_clock_getres)
|
||||
|
||||
/*
|
||||
* Exact prototype of time()
|
||||
*
|
||||
* time_t time(time *t);
|
||||
*
|
||||
*/
|
||||
V_FUNCTION_BEGIN(__kernel_time)
|
||||
cvdso_call_time __c_kernel_time
|
||||
V_FUNCTION_END(__kernel_time)
|
||||
@ -1 +0,0 @@
|
||||
#include "../vdso32/note.S"
|
||||
@ -1,29 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Powerpc userspace implementations of gettimeofday() and similar.
|
||||
*/
|
||||
#include <linux/time.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
int __c_kernel_clock_gettime(clockid_t clock, struct __kernel_timespec *ts,
|
||||
const struct vdso_data *vd)
|
||||
{
|
||||
return __cvdso_clock_gettime_data(vd, clock, ts);
|
||||
}
|
||||
|
||||
int __c_kernel_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz,
|
||||
const struct vdso_data *vd)
|
||||
{
|
||||
return __cvdso_gettimeofday_data(vd, tv, tz);
|
||||
}
|
||||
|
||||
int __c_kernel_clock_getres(clockid_t clock_id, struct __kernel_timespec *res,
|
||||
const struct vdso_data *vd)
|
||||
{
|
||||
return __cvdso_clock_getres_data(vd, clock_id, res);
|
||||
}
|
||||
|
||||
__kernel_old_time_t __c_kernel_time(__kernel_old_time_t *time, const struct vdso_data *vd)
|
||||
{
|
||||
return __cvdso_time_data(vd, time);
|
||||
}
|
||||
@ -7,7 +7,7 @@
|
||||
.globl vdso64_start, vdso64_end
|
||||
.balign PAGE_SIZE
|
||||
vdso64_start:
|
||||
.incbin "arch/powerpc/kernel/vdso64/vdso64.so.dbg"
|
||||
.incbin "arch/powerpc/kernel/vdso/vdso64.so.dbg"
|
||||
.balign PAGE_SIZE
|
||||
vdso64_end:
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user