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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2005-06-21 17:16:25 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 19:07:32 -0700
commit60b2737de1b1ddfdb90f3ba622634eb49d6f3603 (patch)
treea352eda5ca213cdae0a2eabd6693b8a4f573e38f /arch/um/scripts
parentb77d6adc922b8bbf8b16b67f567958c42962cf88 (diff)
[PATCH] uml: fix linkage of tt mode against NPTL
With Al Viro <viro@parcelfarce.linux.theplanet.co.uk> To make sure switcheroo() can execute when we remap all the executable image, we used a trick to make it use a local copy of errno... this trick does not work with NPTL glibc, only with LinuxThreads, so use another (simpler) one to make it work anyway. Hopefully, a lot improved thanks to merging with the version of Al Viro (which had his part of problems, though, i.e. removing a fix to another bug and not fixing the problem on i386). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/scripts')
-rw-r--r--arch/um/scripts/Makefile.rules6
-rw-r--r--arch/um/scripts/Makefile.unmap22
2 files changed, 28 insertions, 0 deletions
diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules
index 98346c71149..7459d09c233 100644
--- a/arch/um/scripts/Makefile.rules
+++ b/arch/um/scripts/Makefile.rules
@@ -10,6 +10,12 @@ USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))
$(USER_OBJS) : c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \
$(CFLAGS_$(notdir $@))
+# The stubs and unmap.o can't try to call mcount or update basic block data
+define unprofile
+ $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1)))
+endef
+
+
quiet_cmd_make_link = SYMLINK $@
cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@
diff --git a/arch/um/scripts/Makefile.unmap b/arch/um/scripts/Makefile.unmap
new file mode 100644
index 00000000000..37a8f976529
--- /dev/null
+++ b/arch/um/scripts/Makefile.unmap
@@ -0,0 +1,22 @@
+clean-files += unmap_tmp.o unmap_fin.o unmap.o
+
+ifdef CONFIG_MODE_TT
+
+#Always build unmap_fin.o
+extra-y += unmap_fin.o
+#Do dependency tracking for unmap.o (it will be always built, but won't get the tracking unless we use this).
+targets += unmap.o
+
+#XXX: partially copied from arch/um/scripts/Makefile.rules
+$(obj)/unmap.o: _c_flags = $(call unprofile,$(CFLAGS))
+
+quiet_cmd_wrapld = LD $@
+define cmd_wrapld
+ $(LD) -r -o $(obj)/unmap_tmp.o $< $(shell $(CC) -print-file-name=libc.a); \
+ $(OBJCOPY) $(obj)/unmap_tmp.o $@ -G switcheroo
+endef
+
+$(obj)/unmap_fin.o : $(obj)/unmap.o FORCE
+ $(call if_changed,wrapld)
+
+endif