From 7239b516940fc134f895f6480e1b15346f40f75b Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Tue, 21 Jul 2009 01:07:24 +0000 Subject: [PATCH] Add the following functions: - SYSCALL (normal fast system call instruction) [0f 05] - SYSENTER (system call entry instruction) [0f 34] - SYSEXIT (system call exit instruction) [0f 35] - SYSEXIT64 (system call exit instruction to 64-bit user code) [REX.W 0f 35] - SYSRET (system call return instruction) [0f 07] Patch by Sean Callanan. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76528 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86Instr64bit.td | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td index c4b25fca2fc..1dd7e07964e 100644 --- a/lib/Target/X86/X86Instr64bit.td +++ b/lib/Target/X86/X86Instr64bit.td @@ -245,6 +245,18 @@ let Defs = [RCX,RDI], Uses = [RAX,RCX,RDI] in def REP_STOSQ : RI<0xAB, RawFrm, (outs), (ins), "{rep;stosq|rep stosq}", [(X86rep_stos i64)]>, REP; +// Fast system-call instructions +def SYSCALL : I<0x05, RawFrm, + (outs), (ins), "syscall", []>, TB; +def SYSENTER : I<0x34, RawFrm, + (outs), (ins), "sysenter", []>, TB; +def SYSEXIT : I<0x35, RawFrm, + (outs), (ins), "sysexit", []>, TB; +def SYSEXIT64 : RI<0x35, RawFrm, + (outs), (ins), "sysexit", []>, TB; +def SYSRET : I<0x07, RawFrm, + (outs), (ins), "sysret", []>, TB; + //===----------------------------------------------------------------------===// // Move Instructions... //