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author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2005-07-14 00:33:43 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-14 09:00:25 -0700 |
commit | 20d0021394c1b070bf04b22c5bc8fdb437edd4c5 (patch) | |
tree | 283d0cd3bfdaec49ed2b29d568f5ceca5e3f1d2a | |
parent | ecc354a90af90a80dcaccc750f5f3e5e7c83112d (diff) | |
download | linux-20d0021394c1b070bf04b22c5bc8fdb437edd4c5.tar.gz linux-20d0021394c1b070bf04b22c5bc8fdb437edd4c5.tar.bz2 linux-20d0021394c1b070bf04b22c5bc8fdb437edd4c5.zip |
[PATCH] uml: allow building as 32-bit binary on 64bit host
This patch makes the command:
make ARCH=um SUBARCH=i386
work on x86_64 hosts (with support for building 32-bit binaries). This is
especially needed since 64-bit UMLs don't support 32-bit emulation for guest
binaries, currently. This has been tested in all possible cases and works.
Only exception is that I've built but not tested a 64-bit binary, because I
hadn't a 64-bit filesystem available.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r-- | arch/um/Makefile | 11 | ||||
-rw-r--r-- | arch/um/Makefile-i386 | 31 | ||||
-rw-r--r-- | arch/um/Makefile-x86_64 | 6 | ||||
-rw-r--r-- | arch/um/scripts/Makefile.unmap | 4 |
4 files changed, 31 insertions, 21 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile index 6a7a9f43cdef..eb4ac403bd93 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -51,11 +51,6 @@ MRPROPER_DIRS += $(ARCH_DIR)/include2 endif SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) -include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) - -core-y += $(SUBARCH_CORE) -libs-y += $(SUBARCH_LIBS) - # -Dvmap=kernel_vmap affects everything, and prevents anything from # referencing the libpcap.o symbol so named. @@ -64,7 +59,7 @@ CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ - $(MODE_INCLUDE) $(ARCH_USER_CFLAGS) + $(MODE_INCLUDE) # -Derrno=kernel_errno - This turns all kernel references to errno into # kernel_errno to separate them from the libc errno. This allows -fno-common @@ -74,6 +69,8 @@ USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask CFLAGS += $(call cc-option,-fno-unit-at-a-time,) +include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) + #This will adjust *FLAGS accordingly to the platform. include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) @@ -132,7 +129,7 @@ CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ #The wrappers will select whether using "malloc" or the kernel allocator. LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc -CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS) +CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) define cmd_vmlinux__ $(CC) $(CFLAGS_vmlinux) -o $@ \ -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 301059062a3e..93d0818fa816 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -1,4 +1,4 @@ -SUBARCH_CORE := arch/um/sys-i386/ arch/i386/crypto/ +core-y += arch/um/sys-i386/ arch/i386/crypto/ TOP_ADDR := $(CONFIG_TOP_ADDR) @@ -8,21 +8,32 @@ ifeq ($(CONFIG_MODE_SKAS),y) endif endif +LDFLAGS += -m elf_i386 +ELF_ARCH := $(SUBARCH) +ELF_FORMAT := elf32-$(SUBARCH) +OBJCOPYFLAGS := -O binary -R .note -R .comment -S + +ifeq ("$(origin SUBARCH)", "command line") +ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") +CFLAGS += $(call cc-option,-m32) +USER_CFLAGS += $(call cc-option,-m32) +HOSTCFLAGS += $(call cc-option,-m32) +HOSTLDFLAGS += $(call cc-option,-m32) +AFLAGS += $(call cc-option,-m32) +LINK-y += $(call cc-option,-m32) +UML_OBJCOPYFLAGS += -F $(ELF_FORMAT) + +export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS +endif +endif + CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS) -ARCH_USER_CFLAGS := ifneq ($(CONFIG_GPROF),y) ARCH_CFLAGS += -DUM_FASTCALL endif -ELF_ARCH := $(SUBARCH) -ELF_FORMAT := elf32-$(SUBARCH) - -OBJCOPYFLAGS := -O binary -R .note -R .comment -S - -SYS_UTIL_DIR := $(ARCH_DIR)/sys-i386/util - -SYS_HEADERS := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h +SYS_HEADERS := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h prepare: $(SYS_HEADERS) diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64 index d80bd0052e6b..aa2f7174ebca 100644 --- a/arch/um/Makefile-x86_64 +++ b/arch/um/Makefile-x86_64 @@ -1,11 +1,13 @@ # Copyright 2003 - 2004 Pathscale, Inc # Released under the GPL -SUBARCH_LIBS := arch/um/sys-x86_64/ +libs-y += arch/um/sys-x86_64/ START := 0x60000000 +#We #undef __x86_64__ for kernelspace, not for userspace where +#it's needed for headers to work! CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS) -ARCH_USER_CFLAGS := -D__x86_64__ +USER_CFLAGS += -fno-builtin ELF_ARCH := i386:x86-64 ELF_FORMAT := elf64-x86-64 diff --git a/arch/um/scripts/Makefile.unmap b/arch/um/scripts/Makefile.unmap index 37a8f9765295..802d027a1e13 100644 --- a/arch/um/scripts/Makefile.unmap +++ b/arch/um/scripts/Makefile.unmap @@ -12,8 +12,8 @@ $(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 + $(LD) $(LDFLAGS) -r -o $(obj)/unmap_tmp.o $< $(shell $(CC) $(CFLAGS) -print-file-name=libc.a); \ + $(OBJCOPY) $(UML_OBJCOPYFLAGS) $(obj)/unmap_tmp.o $@ -G switcheroo endef $(obj)/unmap_fin.o : $(obj)/unmap.o FORCE |