diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2005-07-29 13:01:18 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-29 12:17:26 -0700 |
| commit | e7b47ccaf655cbaf336745a9b65cf7b22a536fca (patch) | |
| tree | e60c0850ffab179e4080c5deb718a7b9a76b0a5c /arch/i386 | |
| parent | 1108bae41e2ac596f46bc4cd8876b93063203d2b (diff) | |
[PATCH] i386 machine_kexec: Cleanup inline assembly
For some reason I was telling my inline assembly that the
input argument was an output argument.
Playing in the trampoline code I have seen a couple of
instances where lgdt get the wrong size (because the
trampolines run in 16bit mode) so use lgdtl and lidtl to
be explicit.
Additionally gcc-3.3 and gcc-3.4 want's an lvalue for a
memory argument and it doesn't think an array of characters
is an lvalue so use a packed structure instead.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/machine_kexec.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c index 52ed18d8b511..cb699a2aa1f8 100644 --- a/arch/i386/kernel/machine_kexec.c +++ b/arch/i386/kernel/machine_kexec.c @@ -16,6 +16,7 @@ #include <asm/io.h> #include <asm/apic.h> #include <asm/cpufeature.h> +#include <asm/desc.h> static inline unsigned long read_cr3(void) { @@ -90,33 +91,32 @@ static void identity_map_page(unsigned long address) } #endif - static void set_idt(void *newidt, __u16 limit) { - unsigned char curidt[6]; + struct Xgt_desc_struct curidt; /* ia32 supports unaliged loads & stores */ - (*(__u16 *)(curidt)) = limit; - (*(__u32 *)(curidt +2)) = (unsigned long)(newidt); + curidt.size = limit; + curidt.address = (unsigned long)newidt; __asm__ __volatile__ ( - "lidt %0\n" - : "=m" (curidt) + "lidtl %0\n" + : : "m" (curidt) ); }; static void set_gdt(void *newgdt, __u16 limit) { - unsigned char curgdt[6]; + struct Xgt_desc_struct curgdt; /* ia32 supports unaligned loads & stores */ - (*(__u16 *)(curgdt)) = limit; - (*(__u32 *)(curgdt +2)) = (unsigned long)(newgdt); + curgdt.size = limit; + curgdt.address = (unsigned long)newgdt; __asm__ __volatile__ ( - "lgdt %0\n" - : "=m" (curgdt) + "lgdtl %0\n" + : : "m" (curgdt) ); }; |