diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-25 23:16:12 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:14:44 +0200 |
| commit | 53aaf262c66ee237e4163f1af347939ebd9c51c2 (patch) | |
| tree | 3c60eab10af8558abdc779e9ae8a1270d72d5724 /arch/x86/entry/entry_32.S | |
| parent | 60400677e1280dae7d903e5997fb1cfabb22d4bd (diff) | |
x86/idtentry: Provide macros to define/declare IDT entry points
Provide DECLARE/DEFINE_IDTENTRY() macros.
DEFINE_IDTENTRY() provides a wrapper which acts as the function
definition. The exception handler body is just appended to it with curly
brackets. The entry point is marked noinstr so that irq tracing and the
enter_from_user_mode() can be moved into the C-entry point. As all
C-entries use the same macro (or a later variant) the necessary entry
handling can be implemented at one central place.
DECLARE_IDTENTRY() provides the function prototypes:
- The C entry point cfunc
- The ASM entry point asm_cfunc
- The XEN/PV entry point xen_asm_cfunc
They all follow the same naming convention.
When included from ASM code DECLARE_IDTENTRY() is a macro which emits the
low level entry point in assembly by instantiating idtentry.
IDTENTRY is the simplest variant which just has a pt_regs argument. It's
going to be used for all exceptions which have no error code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134904.273363275@linutronix.de
Diffstat (limited to 'arch/x86/entry/entry_32.S')
| -rw-r--r-- | arch/x86/entry/entry_32.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index eb64e78052e1..8c0e07e2860f 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -753,6 +753,12 @@ SYM_CODE_END(\asmsym) .endm /* + * Include the defines which emit the idt entries which are shared + * shared between 32 and 64 bit. + */ +#include <asm/idtentry.h> + +/* * %eax: prev task * %edx: next task */ |