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linux-imx/tools/objtool/Build
Peter Zijlstra 2a362ecc3e objtool: Optimize find_symbol_*() and read_symbols() 
All of:

  read_symbols(), find_symbol_by_offset(), find_symbol_containing(),
  find_containing_func()

do a linear search of the symbols. Add an RB tree to make it go
faster.

This about halves objtool runtime on vmlinux.o, from 34s to 18s.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200324160924.499016559@infradead.org
2020-03-25 18:28:29 +01:00

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objtool-y += arch/$(SRCARCH)/ objtool-y += builtin-check.o objtool-y += builtin-orc.o objtool-y += check.o objtool-y += orc_gen.o objtool-y += orc_dump.o objtool-y += elf.o objtool-y += special.o objtool-y += objtool.o

objtool-y += libstring.o objtool-y += libctype.o objtool-y += str_error_r.o objtool-y += librbtree.o

CFLAGS += -I$(srctree)/tools/lib

$(OUTPUT)libstring.o: ../lib/string.c FORCE $(call rule_mkdir) $(call if_changed_dep,cc_o_c)

$(OUTPUT)libctype.o: ../lib/ctype.c FORCE $(call rule_mkdir) $(call if_changed_dep,cc_o_c)

$(OUTPUT)str_error_r.o: ../lib/str_error_r.c FORCE $(call rule_mkdir) $(call if_changed_dep,cc_o_c)

$(OUTPUT)librbtree.o: ../lib/rbtree.c FORCE $(call rule_mkdir) $(call if_changed_dep,cc_o_c)