e3bcf5e278
Some versions of ld.so mmap the shared libraries right in over guest memory, so compile lguest statically by default. [ FC7 maps shared libraries very low, where the launcher maps guest's physical memory. Quick fix is to link Launcher static, real fix is for 2.6.24. ] -static is a simple fix. I expect this problem will be more common than we like, as different distro's make different "improvements" to ld.so Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
29 lines
999 B
Makefile
29 lines
999 B
Makefile
# This creates the demonstration utility "lguest" which runs a Linux guest.
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# For those people that have a separate object dir, look there for .config
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KBUILD_OUTPUT := ../..
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ifdef O
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ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
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endif
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endif
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# We rely on CONFIG_PAGE_OFFSET to know where to put lguest binary.
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include $(KBUILD_OUTPUT)/.config
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LGUEST_GUEST_TOP := ($(CONFIG_PAGE_OFFSET) - 0x08000000)
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CFLAGS:=-Wall -Wmissing-declarations -Wmissing-prototypes -O3 -Wl,-T,lguest.lds
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LDLIBS:=-lz
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# Removing this works for some versions of ld.so (eg. Ubuntu Feisty) and
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# not others (eg. FC7).
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LDFLAGS+=-static
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all: lguest.lds lguest
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# The linker script on x86 is so complex the only way of creating one
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# which will link our binary in the right place is to mangle the
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# default one.
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lguest.lds:
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$(LD) --verbose | awk '/^==========/ { PRINT=1; next; } /SIZEOF_HEADERS/ { gsub(/0x[0-9A-F]*/, "$(LGUEST_GUEST_TOP)") } { if (PRINT) print $$0; }' > $@
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clean:
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rm -f lguest.lds lguest
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