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Linux/arch/arm64/kernel/vdso/Makefile

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Diff markup

Differences between /arch/arm64/kernel/vdso/Makefile (Architecture mips) and /arch/sparc64/kernel/vdso/Makefile (Architecture sparc64)


  1 # SPDX-License-Identifier: GPL-2.0                
  2 #                                                 
  3 # Building a vDSO image for AArch64.              
  4 #                                                 
  5 # Author: Will Deacon <will.deacon@arm.com>        
  6 # Heavily based on the vDSO Makefiles for othe    
  7 #                                                 
  8                                                   
  9 # Include the generic Makefile to check the bu    
 10 include $(srctree)/lib/vdso/Makefile              
 11                                                   
 12 obj-vdso := vgettimeofday.o note.o sigreturn.o    
 13                                                   
 14 # Build rules                                     
 15 targets := $(obj-vdso) vdso.so vdso.so.dbg        
 16 obj-vdso := $(addprefix $(obj)/, $(obj-vdso))     
 17                                                   
 18 btildflags-$(CONFIG_ARM64_BTI_KERNEL) += -z fo    
 19                                                   
 20 # -Bsymbolic has been added for consistency wi    
 21 # potential future proofing if we end up with     
 22 # routines, as x86 does (see 6f121e548f83 ("x8    
 23 # preparation in build-time C")).                 
 24 ldflags-y := -shared -soname=linux-vdso.so.1 \    
 25              -Bsymbolic --build-id=sha1 -n $(b    
 26                                                   
 27 ifdef CONFIG_LD_ORPHAN_WARN                       
 28   ldflags-y += --orphan-handling=$(CONFIG_LD_O    
 29 endif                                             
 30                                                   
 31 ldflags-y += -T                                   
 32                                                   
 33 ccflags-y := -fno-common -fno-builtin -fno-sta    
 34 ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUIL    
 35                                                   
 36 # -Wmissing-prototypes and -Wmissing-declarati    
 37 # the CFLAGS to make possible to build the ker    
 38 CC_FLAGS_REMOVE_VDSO := $(CC_FLAGS_FTRACE) -Os    
 39                         $(RANDSTRUCT_CFLAGS) $    
 40                         $(CC_FLAGS_LTO) $(CC_F    
 41                         -Wmissing-prototypes -    
 42                                                   
 43 CC_FLAGS_ADD_VDSO := -O2 -mcmodel=tiny -fasync    
 44                                                   
 45 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_REM    
 46 CFLAGS_REMOVE_vgetrandom.o = $(CC_FLAGS_REMOVE    
 47                                                   
 48 CFLAGS_vgettimeofday.o = $(CC_FLAGS_ADD_VDSO)     
 49 CFLAGS_vgetrandom.o = $(CC_FLAGS_ADD_VDSO)        
 50                                                   
 51 ifneq ($(c-gettimeofday-y),)                      
 52   CFLAGS_vgettimeofday.o += -include $(c-getti    
 53 endif                                             
 54                                                   
 55 ifneq ($(c-getrandom-y),)                         
 56   CFLAGS_vgetrandom.o += -include $(c-getrando    
 57 endif                                             
 58                                                   
 59 targets += vdso.lds                               
 60 CPPFLAGS_vdso.lds += -P -C -U$(ARCH)              
 61                                                   
 62 # Link rule for the .so file, .lds has to be f    
 63 $(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso    
 64         $(call if_changed,vdsold_and_vdso_chec    
 65                                                   
 66 # Strip rule for the .so file                     
 67 $(obj)/%.so: OBJCOPYFLAGS := -S                   
 68 $(obj)/%.so: $(obj)/%.so.dbg FORCE                
 69         $(call if_changed,objcopy)                
 70                                                   
 71 # Generate VDSO offsets using helper script       
 72 gen-vdsosym := $(src)/gen_vdso_offsets.sh         
 73 quiet_cmd_vdsosym = VDSOSYM $@                    
 74       cmd_vdsosym = $(NM) $< | $(gen-vdsosym)     
 75                                                   
 76 include/generated/vdso-offsets.h: $(obj)/vdso.    
 77         $(call if_changed,vdsosym)                
 78                                                   
 79 # Actual build commands                           
 80 quiet_cmd_vdsold_and_vdso_check = LD      $@      
 81       cmd_vdsold_and_vdso_check = $(cmd_ld); $    
                                                      

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