tools/perf/scripts/Makefile.syscalls

   1 # SPDX-License-Identifier: GPL-2.0
   2 # This Makefile generates headers in
   3 # tools/perf/arch/$(SRCARCH)/include/generated/asm from the architecture's
   4 # syscall table. This will either be from the generic syscall table, or from a
   5 # table that is specific to that architecture.
   6
   7 PHONY := all
   8 all:
   9
  10 obj := $(OUTPUT)arch/$(SRCARCH)/include/generated/asm
  11
  12 syscall_abis_32  := common,32
  13 syscall_abis_64  := common,64
  14 syscalltbl := $(srctree)/tools/scripts/syscall.tbl
  15
  16 # let architectures override $(syscall_abis_%) and $(syscalltbl)
  17 -include $(srctree)/tools/perf/arch/$(SRCARCH)/entry/syscalls/Makefile.syscalls
  18 include $(srctree)/tools/build/Build.include
  19 -include $(srctree)/tools/perf/arch/$(SRCARCH)/entry/syscalls/Kbuild
  20
  21 systbl := $(srctree)/tools/perf/scripts/syscalltbl.sh
  22
  23 syscall-y   := $(addprefix $(obj)/, $(syscall-y))
  24
  25 # Remove stale wrappers when the corresponding files are removed from generic-y
  26 old-headers := $(wildcard $(obj)/*.h)
  27 unwanted    := $(filter-out $(syscall-y),$(old-headers))
  28
  29 quiet_cmd_remove = REMOVE  $(unwanted)
  30       cmd_remove = rm -f $(unwanted)
  31
  32 quiet_cmd_systbl = SYSTBL  $@
  33       cmd_systbl = $(CONFIG_SHELL) $(systbl) \
  34                    $(if $(systbl-args-$*),$(systbl-args-$*),$(systbl-args)) \
  35                    --abis $(subst $(space),$(comma),$(strip $(syscall_abis_$*))) \
  36                    $< $@
  37
  38 all: $(syscall-y)
  39         $(if $(unwanted),$(call cmd,remove))
  40         @:
  41
  42 $(obj)/syscalls_%.h: $(syscalltbl) $(systbl) FORCE
  43         $(call if_changed,systbl)
  44
  45 targets := $(syscall-y)
  46
  47 # Create output directory. Skip it if at least one old header exists
  48 # since we know the output directory already exists.
  49 ifeq ($(old-headers),)
  50 $(shell mkdir -p $(obj))
  51 endif
  52
  53 PHONY += FORCE
  54
  55 FORCE:
  56
  57 existing-targets := $(wildcard $(sort $(targets)))
  58
  59 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
  60
  61 .PHONY: $(PHONY)