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Don't let ld.so that failed its sanity check land in place.

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Roland McGrath 2013-06-13 10:26:44 -07:00
parent ad36ba2bd6
commit f4a29fba07
2 changed files with 10 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2013-06-13 Roland McGrath <roland@hack.frob.com>
* elf/Makefile ($(objpfx)ld.so): Link into a temporary file and move
it into place only when and if the sanity check passes.
2013-06-13 Joseph Myers <joseph@codesourcery.com>
* stdlib/gen-tst-strtod-round.c (round_str): Always generate

7
elf/Makefile
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@ -318,13 +318,16 @@ generated += librtld.map librtld.mk rtld-libc.a librtld.os.map
z-now-yes = -Wl,-z,now
$(objpfx)ld.so: $(objpfx)librtld.os $(ld-map)
$(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
# Link into a temporary file so that we don't touch $@ at all
# if the sanity check below fails.
$(LINK.o) -nostdlib -nostartfiles -shared -o $@.new \
$(LDFLAGS-rtld) -Wl,-z,defs $(z-now-$(bind-now)) \
$(filter-out $(map-file),$^) $(load-map-file) \
-Wl,-soname=$(rtld-installed-name) \
-Wl,-defsym=_begin=0
$(READELF) -s $@ \
$(READELF) -s $@.new \
| $(AWK) '($$7 ~ /^UND(|EF)$$/ && $$1 != "0:" && $$4 != "REGISTER") { print; p=1 } END { exit p != 0 }'
mv -f $@.new $@
# interp.c exists just to get this string into the libraries.
CFLAGS-interp.c = -D'RUNTIME_LINKER="$(rtlddir)/$(rtld-installed-name)"' \