Messages in this thread Patch in this message | | | Date | Tue, 25 Feb 2020 23:16:21 +0100 | From | Thomas Gleixner <> | Subject | [patch 15/24] x86/entry: Provide IDTENTRY_ERRORCODE |
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Same as IDTENTRY but the C entry point has an error code argument.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/include/asm/idtentry.h | 43 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)
--- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -68,12 +68,55 @@ NOKPROBE_SYMBOL(func); \ \ static __always_inline void __##func(struct pt_regs *regs) +/** + * DECLARE_IDTENTRY_ERRORCODE - Declare functions for simple IDT entry points + * Error code pushed by hardware + * @vector: Vector number (ignored for C) + * @func: Function name of the entry point + * + * Declares three functions: + * - The ASM entry point: asm_##func + * - The XEN PV trap entry point: xen_##func (maybe unused) + * - The C handler called from the ASM entry point + */ +#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \ + asmlinkage void asm_##func(void); \ + asmlinkage void xen_asm_##func(void); \ + __visible void func(struct pt_regs *regs, unsigned long error_code) + +/** + * DEFINE_IDTENTRY_ERRORCODE - Emit code for simple IDT entry points + * Error code pushed by hardware + * @func: Function name of the entry point + * + * Same as DEFINE_IDTENTRY, but has an extra error_code argument + */ +#define DEFINE_IDTENTRY_ERRORCODE(func) \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long error_code); \ + \ +__visible notrace void func(struct pt_regs *regs, \ + unsigned long error_code) \ +{ \ + idtentry_enter(regs); \ + __##func (regs, error_code); \ + idtentry_exit(regs); \ +} \ +NOKPROBE_SYMBOL(func); \ + \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long error_code) + + #else /* !__ASSEMBLY__ */ /* Defines for ASM code to construct the IDT entries */ #define DECLARE_IDTENTRY(vector, func) \ idtentry vector asm_##func func has_error_code=0 +#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \ + idtentry vector asm_##func func has_error_code=1 + #endif /* __ASSEMBLY__ */ /* Simple exception entries: */
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