Messages in this thread | | | From | "H. Peter Anvin, Intel" <> | Subject | [PATCH v3 0/7] x86/ptrace: regset access to the GDT and LDT | Date | Thu, 21 Jun 2018 14:17:47 -0700 |
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From: "H. Peter Anvin" <hpa@linux.intel.com>
Give a debugger access to the visible part of the GDT and LDT. This allows a debugger to find out what a particular segment descriptor corresponds to; e.g. if %cs is 16, 32, or 64 bits.
v3: Requalify LDT segments for selectors that have actually changed.
v2: Add missing change to elf.h for the very last patch.
Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Chang S. Bae <chang.seok.bae@intel.com> Cc: Markus T. Metzger <markus.t.metzger@intel.com> Cc: H. Peter Anvin <hpa@zytor.com>
arch/x86/Kconfig | 4 + arch/x86/include/asm/desc.h | 24 +++- arch/x86/include/asm/ldt.h | 16 +++ arch/x86/include/asm/segment.h | 10 ++ arch/x86/kernel/Makefile | 3 +- arch/x86/kernel/ldt.c | 283 ++++++++++++++++++++++++++++++++--------- arch/x86/kernel/ptrace.c | 103 ++++++++++++++- arch/x86/kernel/tls.c | 102 +++++---------- arch/x86/kernel/tls.h | 8 +- include/uapi/linux/elf.h | 2 + 10 files changed, 413 insertions(+), 142 deletions(-)
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