[RFC 20/31] objtool: Add UD1 detection

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



A UD1 isn't a BUG and shouldn't be treated like one.

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
 tools/objtool/arch/x86/decode.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 6b34b058a821..72d55dcd3d7f 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -528,11 +528,19 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec
 			/* sysenter, sysret */
 			insn->type = INSN_CONTEXT_SWITCH;
 
-		} else if (op2 == 0x0b || op2 == 0xb9) {
+		} else if (op2 == 0x0b) {
 
 			/* ud2 */
 			insn->type = INSN_BUG;
 
+		} else if (op2 == 0xb9) {
+
+			/*
+			 * ud1 - only used for the static call trampoline to
+			 * stop speculation.  Basically used like an int3.
+			 */
+			insn->type = INSN_TRAP;
+
 		} else if (op2 == 0x0d || op2 == 0x1f) {
 
 			/* nopl/nopw */
-- 
2.45.2





[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux Kernel]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux SCSI]

  Powered by Linux