changeset f24733876990 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=f24733876990
description:
X86: Implement the int system call interface in the decoder.
diffstat:
1 file changed, 11 insertions(+)
src/arch/x86/isa/decoder/one_byte_opcodes.isa | 11 +++++++++++
diffs (22 lines):
diff -r a49d9413a9e8 -r f24733876990
src/arch/x86/isa/decoder/one_byte_opcodes.isa
--- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa Fri Feb 27 09:21:36
2009 -0800
+++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa Fri Feb 27 09:21:58
2009 -0800
@@ -418,7 +418,18 @@
default: Inst::RET_FAR();
}
0x4: int3();
+#if FULL_SYSTEM
0x5: int_Ib();
+#else
+ // Really only the LSB matters, but the predecoder will sign
+ // extend it, and there's no easy way to specify only checking
+ // the first byte.
+ 0x5: decode IMMEDIATE {
+ 0xffffffffffffff80:
+ SyscallInst::int80('xc->syscall(Rax)', IsSyscall);
+ default: int_Ib();
+ }
+#endif
0x6: decode MODE_SUBMODE {
0x0: Inst::UD2();
default: into();
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