Messages in this thread Patch in this message | | | Date | Mon, 7 Jan 2008 13:33:46 +0100 | From | Markus Metzger <> | Subject | [patch 1/2] x86, ptrace: add version and last remaining size to status command |
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Return the API version and the size of a bts_struct in the PTRACE_BTS_STATUS command. This might be handy in case other archs want to use and extend the interface. It allows users to program against one version and continue to work for newer versions (they have to discard everything they don't understand, of course).
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> ---
Index: linux-2.6-x86/arch/x86/kernel/ptrace.c =================================================================== --- linux-2.6-x86.orig/arch/x86/kernel/ptrace.c 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/arch/x86/kernel/ptrace.c 2008-01-07 13:09:07.%N +0100 @@ -787,6 +787,9 @@ cfg.flags |= PTRACE_BTS_O_SCHED; } + cfg.bts_size = sizeof(struct bts_struct); + cfg.version = PTRACE_BTS_VERSION; + if (copy_to_user(ucfg, &cfg, sizeof(cfg))) return -EFAULT; Index: linux-2.6-x86/include/asm-x86/ptrace-abi.h =================================================================== --- linux-2.6-x86.orig/include/asm-x86/ptrace-abi.h 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/include/asm-x86/ptrace-abi.h 2008-01-07 13:08:39.%N +0100 @@ -91,6 +91,10 @@ unsigned int flags; /* buffer overflow signal */ unsigned int signal; + /* actual size of bts_struct in bytes */ + unsigned short bts_size; + /* interface version */ + unsigned short version; }; #endif Index: linux-2.6-x86/include/asm-x86/ptrace.h =================================================================== --- linux-2.6-x86.orig/include/asm-x86/ptrace.h 2008-01-07 12:42:39.%N +0100 +++ linux-2.6-x86/include/asm-x86/ptrace.h 2008-01-07 13:08:39.%N +0100 @@ -9,6 +9,8 @@ #ifdef __KERNEL__ +#define PTRACE_BTS_VERSION 1 + /* the DS BTS struct is used for ptrace as well */ #include <asm/ds.h> --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
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