diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2012-04-20 16:57:35 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-04-20 16:57:35 -0700 |
| commit | 535c0c34698061544f81a51c65fc51f4eeeebff6 (patch) | |
| tree | 76f4ad3784af2be36407f5da28b8d1adb77b105a /arch/x86/include/asm/asm.h | |
| parent | a3e859fed1244b72253718e076a724ffe13a9584 (diff) | |
x86, extable: Add _ASM_EXTABLE_EX() macro
Add _ASM_EXTABLE_EX() to generate the special extable entries that are
associated with uaccess_err. This allows us to change the protocol
associated with these special entries.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: David Daney <david.daney@cavium.com>
Link: http://lkml.kernel.org/r/CA%2B55aFyijf43qSu3N9nWHEBwaGbb7T2Oq9A=9EyR=Jtyqfq_cQ@mail.gmail.com
Diffstat (limited to 'arch/x86/include/asm/asm.h')
| -rw-r--r-- | arch/x86/include/asm/asm.h | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index 53dce41f2517..0f15e8a4f565 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -40,16 +40,28 @@ /* Exception table entry */ #ifdef __ASSEMBLY__ -# define _ASM_EXTABLE(from,to) \ - .pushsection "__ex_table","a" ; \ - _ASM_ALIGN ; \ - _ASM_PTR from , to ; \ +# define _ASM_EXTABLE(from,to) \ + .pushsection "__ex_table","a" ; \ + _ASM_ALIGN ; \ + _ASM_PTR from , to ; \ + .popsection + +# define _ASM_EXTABLE_EX(from,to) \ + .pushsection "__ex_table","a" ; \ + _ASM_ALIGN ; \ + _ASM_PTR from , (to) - (from) ; \ .popsection #else -# define _ASM_EXTABLE(from,to) \ - " .pushsection \"__ex_table\",\"a\"\n" \ - _ASM_ALIGN "\n" \ - _ASM_PTR #from "," #to "\n" \ +# define _ASM_EXTABLE(from,to) \ + " .pushsection \"__ex_table\",\"a\"\n" \ + _ASM_ALIGN "\n" \ + _ASM_PTR #from "," #to "\n" \ + " .popsection\n" + +# define _ASM_EXTABLE_EX(from,to) \ + " .pushsection \"__ex_table\",\"a\"\n" \ + _ASM_ALIGN "\n" \ + _ASM_PTR #from ",(" #to ")-(" #from ")\n" \ " .popsection\n" #endif |