diff options
Diffstat (limited to 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/elf/Makefile b/elf/Makefile index dfd43fb39b..ffc34a67d4 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -484,21 +484,25 @@ $(objpfx)dl-allobjs.os: $(all-rtld-routines:%=$(objpfx)%.os) # are compiled with special flags, and puts these modules into rtld-libc.a # for us. Then we do the real link using rtld-libc.a instead of libc_pic.a. -# If the compiler can do SSP, build the mapfile with dummy __stack_chk_fail -# and __stack_chk_fail_local symbols defined, to prevent the real things -# being dragged into rtld even though rtld is never built with stack- -# protection. +# These symbols need to be stubbed out during symbol discovery because +# their implementation is provided differently in rtld, and the symbol +# discovery mechanism is not compatible with the libc implementation +# when compiled for libc. +rtld-stubbed-symbols = + +# The GCC arguments that implement $(rtld-stubbed-symbols). +rtld-stubbed-symbols-args = \ + $(patsubst %,-Wl$(comma)--defsym=%=0, $(rtld-stubbed-symbols)) ifeq ($(have-ssp),yes) -dummy-stack-chk-fail := -Wl,--defsym='__stack_chk_fail=0' \ - -Wl,--defsym='__stack_chk_fail_local=0' -else -dummy-stack-chk-fail := +# rtld is not built with the stack protector, so these references will +# go away in the rebuilds. +rtld-stubbed-symbols += __stack_chk_fail __stack_chk_fail_local endif $(objpfx)librtld.map: $(objpfx)dl-allobjs.os $(common-objpfx)libc_pic.a @-rm -f $@T - $(reloc-link) -o $@.o $(dummy-stack-chk-fail) \ + $(reloc-link) -o $@.o $(rtld-stubbed-symbols-args) \ '-Wl,-(' $^ -lgcc '-Wl,-)' -Wl,-Map,$@T rm -f $@.o mv -f $@T $@ |