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| author |   Jann Horn <jannh@google.com> | 2018-08-28 22:14:19 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-09-03 15:12:09 +0200 |
| commit | 81fd9c18444ed1199b5a6f6776a395292d4256fb (patch) | |
| tree | 489c7c8c196a5521a7835474fe113158856c2f4a /arch/x86/include/asm/ptrace.h | |
| parent | x86/extable: Introduce _ASM_EXTABLE_UA for uaccess fixups (diff) | |
| download | linux-dev-81fd9c18444ed1199b5a6f6776a395292d4256fb.tar.xz linux-dev-81fd9c18444ed1199b5a6f6776a395292d4256fb.zip | |
x86/fault: Plumb error code and fault address through to fault handlers
This is preparation for looking at trap number and fault address in the
handlers for uaccess errors. No functional change.
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: kernel-hardening@lists.openwall.com
Cc: linux-kernel@vger.kernel.org
Cc: dvyukov@google.com
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Link: https://lkml.kernel.org/r/20180828201421.157735-6-jannh@google.com
Diffstat (limited to 'arch/x86/include/asm/ptrace.h')
| -rw-r--r-- | arch/x86/include/asm/ptrace.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h index 6de1fd3d0097..5e58a74bfd3a 100644 --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h @@ -37,8 +37,10 @@ struct pt_regs { unsigned short __esh; unsigned short fs; unsigned short __fsh; + /* On interrupt, gs and __gsh store the vector number. */ unsigned short gs; unsigned short __gsh; + /* On interrupt, this is the error code. */ unsigned long orig_ax; unsigned long ip; unsigned short cs; |