add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/riscv/kernel/vdso/Makefile
..
..
@@ -1,46 +1,60 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 # Copied from arch/tile/kernel/vdso/Makefile
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+# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
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+# the inclusion of generic Makefile.
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+ARCH_REL_TYPE_ABS := R_RISCV_32|R_RISCV_64|R_RISCV_JUMP_SLOT
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+include $(srctree)/lib/vdso/Makefile
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 # Symbols present in the vdso
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 vdso-syms  = rt_sigreturn
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-vdso-syms += gettimeofday
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-vdso-syms += clock_gettime
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-vdso-syms += clock_getres
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+ifdef CONFIG_64BIT
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+vdso-syms += vgettimeofday
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+endif
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 vdso-syms += getcpu
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 vdso-syms += flush_icache
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 # Files to link into the vdso
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-obj-vdso = $(patsubst %, %.o, $(vdso-syms))
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+obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
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+
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+ccflags-y := -fno-stack-protector
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+ccflags-y += -DDISABLE_BRANCH_PROFILING
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+
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+ifneq ($(c-gettimeofday-y),)
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+  CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)
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+endif
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 # Build rules
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-targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o
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+targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-syms.S
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 obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
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 obj-y += vdso.o vdso-syms.o
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 CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
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+ifneq ($(filter vgettimeofday, $(vdso-syms)),)
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+CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY
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+endif
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-# Disable gcov profiling for VDSO code
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+# Disable -pg to prevent insert call site
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+CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
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+
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+# Disable profiling and instrumentation for VDSO code
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 GCOV_PROFILE := n
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+KCOV_INSTRUMENT := n
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+KASAN_SANITIZE := n
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 # Force dependency
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 $(obj)/vdso.o: $(obj)/vdso.so
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 # link rule for the .so file, .lds has to be first
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-SYSCFLAGS_vdso.so.dbg = $(c_flags)
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-$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE
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+$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
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 	$(call if_changed,vdsold)
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+LDFLAGS_vdso.so.dbg = -shared -s -soname=linux-vdso.so.1 \
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+	--build-id=sha1 --hash-style=both --eh-frame-hdr
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 # We also create a special relocatable object that should mirror the symbol
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 # table and layout of the linked DSO. With ld --just-symbols we can then
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 # refer to these symbols in the kernel code rather than hand-coded addresses.
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-
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-SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
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-                            $(call cc-ldoption, -Wl$(comma)--hash-style=both)
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-$(obj)/vdso-dummy.o: $(src)/vdso.lds $(obj)/rt_sigreturn.o FORCE
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-	$(call if_changed,vdsold)
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-
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-LDFLAGS_vdso-syms.o := -r --just-symbols
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-$(obj)/vdso-syms.o: $(obj)/vdso-dummy.o FORCE
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-	$(call if_changed,ld)
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+$(obj)/vdso-syms.S: $(obj)/vdso.so FORCE
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+	$(call if_changed,so2s)
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 # strip rule for the .so file
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 $(obj)/%.so: OBJCOPYFLAGS := -S
..
..
@@ -49,15 +63,17 @@
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 # actual build commands
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 # The DSO images are built using a special linker script
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-# Add -lgcc so rv32 gets static muldi3 and lshrdi3 definitions.
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 # Make sure only to export the intended __vdso_xxx symbol offsets.
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 quiet_cmd_vdsold = VDSOLD  $@
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-      cmd_vdsold = $(CC) $(KBUILD_CFLAGS) $(call cc-option, -no-pie) -nostdlib -nostartfiles $(SYSCFLAGS_$(@F)) \
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-                           -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp && \
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-                   $(CROSS_COMPILE)objcopy \
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-                           $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \
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+      cmd_vdsold = $(LD) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \
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+                   $(OBJCOPY) $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \
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                    rm $@.tmp
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+# Extracts symbol offsets from the VDSO, converting them into an assembly file
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+# that contains the same symbols at the same offsets.
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+quiet_cmd_so2s = SO2S    $@
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+      cmd_so2s = $(NM) -D $< | $(srctree)/$(src)/so2s.sh > $@
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+
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 # install commands for the unstripped file
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 quiet_cmd_vdso_install = INSTALL $@
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       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@