Chuck,
I tired today with 2.6.15-git8 and now it works just fine
on my Opteron box.
Thanks for your help.
On Fri, Jan 06, 2006 at 11:10:16AM -0500, Chuck Ebbert wrote:
> In-Reply-To: <[email protected]>
>
> On Fri, 6 Jan 2006 at 06:02:17 -0800, Stephane Eranian wrote:
>
>
> > To my surprise, applying the same fix to the x86_64 does not
> > solve the problem on my Opteron box. I verified that the
> > offset (144) matches with what the kernel is expecting.
> > Somehow the RF is lost or not set in the proper location.
> > I cannot make forward progress once I reach the breakpoint.
>
>
> I sent this to Andi this morning. Does it work for you?
>
> Signed-off-by: Chuck Ebbert <[email protected]>
>
> arch/x86_64/ia32/ptrace32.c | 9 ++++++---
> arch/x86_64/kernel/ptrace.c | 9 ++++++---
> 2 files changed, 12 insertions(+), 6 deletions(-)
>
> --- 2.6.15-64a.orig/arch/x86_64/ia32/ptrace32.c
> +++ 2.6.15-64a/arch/x86_64/ia32/ptrace32.c
> @@ -28,9 +28,12 @@
> #include <asm/i387.h>
> #include <asm/fpu32.h>
>
> -/* determines which flags the user has access to. */
> -/* 1 = access 0 = no access */
> -#define FLAG_MASK 0x44dd5UL
> +/*
> + * Determines which flags the user has access to [1 = access, 0 = no access].
> + * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
> + * Also masks reserved bits (31-22, 15, 5, 3, 1).
> + */
> +#define FLAG_MASK 0x54dd5UL
>
> #define R32(l,q) \
> case offsetof(struct user32, regs.l): stack[offsetof(struct pt_regs, q)/8] = val; break
> --- 2.6.15-64a.orig/arch/x86_64/kernel/ptrace.c
> +++ 2.6.15-64a/arch/x86_64/kernel/ptrace.c
> @@ -36,9 +36,12 @@
> * in exit.c or in signal.c.
> */
>
> -/* determines which flags the user has access to. */
> -/* 1 = access 0 = no access */
> -#define FLAG_MASK 0x44dd5UL
> +/*
> + * Determines which flags the user has access to [1 = access, 0 = no access].
> + * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
> + * Also masks reserved bits (63-22, 15, 5, 3, 1).
> + */
> +#define FLAG_MASK 0x54dd5UL
>
> /* set's the trap flag. */
> #define TRAP_FLAG 0x100UL
> --
> Chuck
> Currently reading: _Thud!_ by Terry Pratchett
--
-Stephane
-
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