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| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:43:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:04:52 -0800 |
| commit | bb33421dde79f9a36d5485c56335ff178ac7d268 (patch) | |
| tree | f4b8843d9295c1efb550e869352e578cb8667ce1 | |
| parent | 79c62cf1789f935280138b412bb750be84aec747 (diff) | |
| download | linux-3.10-bb33421dde79f9a36d5485c56335ff178ac7d268.tar.gz linux-3.10-bb33421dde79f9a36d5485c56335ff178ac7d268.tar.bz2 linux-3.10-bb33421dde79f9a36d5485c56335ff178ac7d268.zip | |
[PATCH] x86_64: Allow compilation on a 32bit biarch toolchain
This might help on distributions that use a 32bit biarch compiler.
First pass -m64 by default.
Secondly add some more .code32s because at least the Ubuntu biarch
32bit as called by gcc doesn't seem to handle -m64 -m32 as generated
by the Makefile without such assistance.
And finally make sure the linker script can be preprocessed
with a 32bit cpp.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/Makefile | 3 | ||||
| -rw-r--r-- | arch/x86_64/ia32/vsyscall-sigreturn.S | 1 | ||||
| -rw-r--r-- | arch/x86_64/ia32/vsyscall-syscall.S | 1 | ||||
| -rw-r--r-- | arch/x86_64/ia32/vsyscall-sysenter.S | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/vmlinux.lds.S | 2 |
5 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile index 2d3e9be229c..d7fd46479c5 100644 --- a/arch/x86_64/Makefile +++ b/arch/x86_64/Makefile @@ -31,6 +31,7 @@ cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) CFLAGS += $(cflags-y) +CFLAGS += -m64 CFLAGS += -mno-red-zone CFLAGS += -mcmodel=kernel CFLAGS += -pipe @@ -52,6 +53,8 @@ CFLAGS += $(call cc-option,-funit-at-a-time) # prevent gcc from generating any FP code by mistake CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) +AFLAGS += -m64 + head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o libs-y += arch/x86_64/lib/ diff --git a/arch/x86_64/ia32/vsyscall-sigreturn.S b/arch/x86_64/ia32/vsyscall-sigreturn.S index 8b5a4b060bb..d90321fe9bb 100644 --- a/arch/x86_64/ia32/vsyscall-sigreturn.S +++ b/arch/x86_64/ia32/vsyscall-sigreturn.S @@ -7,6 +7,7 @@ * by doing ".balign 32" must match in both versions of the page. */ + .code32 .section .text.sigreturn,"ax" .balign 32 .globl __kernel_sigreturn diff --git a/arch/x86_64/ia32/vsyscall-syscall.S b/arch/x86_64/ia32/vsyscall-syscall.S index b024965bb68..cf9ef678de3 100644 --- a/arch/x86_64/ia32/vsyscall-syscall.S +++ b/arch/x86_64/ia32/vsyscall-syscall.S @@ -6,6 +6,7 @@ #include <asm/asm-offsets.h> #include <asm/segment.h> + .code32 .text .section .text.vsyscall,"ax" .globl __kernel_vsyscall diff --git a/arch/x86_64/ia32/vsyscall-sysenter.S b/arch/x86_64/ia32/vsyscall-sysenter.S index 71f3de586b5..ae056e553d1 100644 --- a/arch/x86_64/ia32/vsyscall-sysenter.S +++ b/arch/x86_64/ia32/vsyscall-sysenter.S @@ -5,6 +5,7 @@ #include <asm/ia32_unistd.h> #include <asm/asm-offsets.h> + .code32 .text .section .text.vsyscall,"ax" .globl __kernel_vsyscall diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S index 4cbbe7c4883..b0eed1faf74 100644 --- a/arch/x86_64/kernel/vmlinux.lds.S +++ b/arch/x86_64/kernel/vmlinux.lds.S @@ -8,6 +8,8 @@ #include <asm/page.h> #include <linux/config.h> +#undef i386 /* in case the preprocessor is a 32bit one */ + OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64") OUTPUT_ARCH(i386:x86-64) ENTRY(phys_startup_64) |