Author: bde
Date: Thu Sep 15 18:30:53 2016
New Revision: 305849
URL: https://svnweb.freebsd.org/changeset/base/305849
Log:
Decode some REX prefixes in inst_call(). This makes the 'next' and
'until' commands work in more cases.
Modified:
head/sys/amd64/include/db_machdep.h
Modified: head/sys/amd64/include/db_machdep.h
==============================================================================
--- head/sys/amd64/include/db_machdep.h Thu Sep 15 17:37:30 2016
(r305848)
+++ head/sys/amd64/include/db_machdep.h Thu Sep 15 18:30:53 2016
(r305849)
@@ -69,14 +69,15 @@ do { \
#define I_CALL 0xe8
#define I_CALLI 0xff
+#define i_calli(ins) (((ins)&0xff) == I_CALLI && ((ins)&0x3800) ==
0x1000)
#define I_RET 0xc3
#define I_IRET 0xcf
+#define i_rex(ins) (((ins) & 0xff) == 0x41 || ((ins) & 0xff) ==
0x43)
#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
#define inst_return(ins) (((ins)&0xff) == I_RET)
-#define inst_call(ins) (((ins)&0xff) == I_CALL || \
- (((ins)&0xff) == I_CALLI && \
- ((ins)&0x3800) == 0x1000))
+#define inst_call(ins) (((ins)&0xff) == I_CALL || i_calli(ins)
|| \
+ (i_calli((ins) >> 8) && i_rex(ins)))
#define inst_load(ins) 0
#define inst_store(ins) 0
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