Messages in this thread Patch in this message | | | Date | Tue, 26 Apr 2005 12:55:26 +0200 | From | Vincent Hanquez <> | Subject | [PATCH 1/6][XEN][x86] add macro for debugreg |
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Hi,
The following patch add 2 macros to set and get debugreg on x86. This is useful for Xen because it will need only to redefine each macro to a hypervisor call.
I can regenerate a patch keeping loaddebug if you folks seems that is necessary or better.
ignore my previous mail, really sorry for the noise.
Please apply, or comments.
Signed-off-by: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk>
diff -Naur linux-2.6.12-rc3/include/asm-i386/processor.h linux-2.6.12-rc3.1/include/asm-i386/processor.h --- linux-2.6.12-rc3/include/asm-i386/processor.h 2005-04-21 11:46:10.000000000 +0100 +++ linux-2.6.12-rc3.1/include/asm-i386/processor.h 2005-04-22 12:09:43.000000000 +0100 @@ -501,12 +501,16 @@ } while (0) /* - * This special macro can be used to load a debugging register + * These special macros can be used to get or set a debugging register */ -#define loaddebug(thread,register) \ - __asm__("movl %0,%%db" #register \ - : /* no output */ \ - :"r" ((thread)->debugreg[register])) +#define cpu_get_debugreg(var, register) \ + __asm__("movl %%db" #register ", %0" \ + :"=r" (var)) +#define cpu_set_debugreg(value, register) \ + __asm__("movl %0,%%db" #register \ + : /* no output */ \ + :"r" (value)) + /* Forward declaration, a strange C thing */ struct task_struct; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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