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r237748 continuation: segment-override prefixes are not invalid in long mode

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Update DTrace disassembler accordingly.  The code to treat the prefixes
as null prefixes was already in place.
Although in practice compilers seem to generate only cs-prefix for use
in long NOPs, the same treatment is applied to all of cs, ds, es, ss for
consistency.

Reported by:	emaste
Tested by:	emaste
Obtained from:	Illumos commit 13442:4adbe6de60c8 (+ local changes)
MFC after:	5 days
This commit is contained in:
avg 2012-07-06 14:41:02 +00:00
parent 56b27dd2e7
commit a00ec46f52
2 changed files with 8 additions and 8 deletions
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8
sys/cddl/dev/dtrace/amd64/dis_tables.c
View File

@ -1146,14 +1146,14 @@ const instable_t dis_distable[16][16] = {
/* [1,C] */ TNS("sbbb",IA), TS("sbb",IA), TSx("push",SEG), TSx("pop",SEG),
}, {
/* [2,0] */ TNS("andb",RMw), TS("and",RMw), TNS("andb",MRw), TS("and",MRw),
/* [2,4] */ TNS("andb",IA), TS("and",IA), TNSx("%es:",OVERRIDE), TNSx("daa",NORM),
/* [2,4] */ TNS("andb",IA), TS("and",IA), TNS("%es:",OVERRIDE), TNSx("daa",NORM),
/* [2,8] */ TNS("subb",RMw), TS("sub",RMw), TNS("subb",MRw), TS("sub",MRw),
/* [2,C] */ TNS("subb",IA), TS("sub",IA), TNSx("%cs:",OVERRIDE), TNSx("das",NORM),
/* [2,C] */ TNS("subb",IA), TS("sub",IA), TNS("%cs:",OVERRIDE), TNSx("das",NORM),
}, {
/* [3,0] */ TNS("xorb",RMw), TS("xor",RMw), TNS("xorb",MRw), TS("xor",MRw),
/* [3,4] */ TNS("xorb",IA), TS("xor",IA), TNSx("%ss:",OVERRIDE), TNSx("aaa",NORM),
/* [3,4] */ TNS("xorb",IA), TS("xor",IA), TNS("%ss:",OVERRIDE), TNSx("aaa",NORM),
/* [3,8] */ TNS("cmpb",RMw), TS("cmp",RMw), TNS("cmpb",MRw), TS("cmp",MRw),
/* [3,C] */ TNS("cmpb",IA), TS("cmp",IA), TNSx("%ds:",OVERRIDE), TNSx("aas",NORM),
/* [3,C] */ TNS("cmpb",IA), TS("cmp",IA), TNS("%ds:",OVERRIDE), TNSx("aas",NORM),
}, {
/* [4,0] */ TSx("inc",R), TSx("inc",R), TSx("inc",R), TSx("inc",R),
/* [4,4] */ TSx("inc",R), TSx("inc",R), TSx("inc",R), TSx("inc",R),

8
sys/cddl/dev/dtrace/i386/dis_tables.c
View File

@ -1146,14 +1146,14 @@ const instable_t dis_distable[16][16] = {
/* [1,C] */ TNS("sbbb",IA), TS("sbb",IA), TSx("push",SEG), TSx("pop",SEG),
}, {
/* [2,0] */ TNS("andb",RMw), TS("and",RMw), TNS("andb",MRw), TS("and",MRw),
/* [2,4] */ TNS("andb",IA), TS("and",IA), TNSx("%es:",OVERRIDE), TNSx("daa",NORM),
/* [2,4] */ TNS("andb",IA), TS("and",IA), TNS("%es:",OVERRIDE), TNSx("daa",NORM),
/* [2,8] */ TNS("subb",RMw), TS("sub",RMw), TNS("subb",MRw), TS("sub",MRw),
/* [2,C] */ TNS("subb",IA), TS("sub",IA), TNSx("%cs:",OVERRIDE), TNSx("das",NORM),
/* [2,C] */ TNS("subb",IA), TS("sub",IA), TNS("%cs:",OVERRIDE), TNSx("das",NORM),
}, {
/* [3,0] */ TNS("xorb",RMw), TS("xor",RMw), TNS("xorb",MRw), TS("xor",MRw),
/* [3,4] */ TNS("xorb",IA), TS("xor",IA), TNSx("%ss:",OVERRIDE), TNSx("aaa",NORM),
/* [3,4] */ TNS("xorb",IA), TS("xor",IA), TNS("%ss:",OVERRIDE), TNSx("aaa",NORM),
/* [3,8] */ TNS("cmpb",RMw), TS("cmp",RMw), TNS("cmpb",MRw), TS("cmp",MRw),
/* [3,C] */ TNS("cmpb",IA), TS("cmp",IA), TNSx("%ds:",OVERRIDE), TNSx("aas",NORM),
/* [3,C] */ TNS("cmpb",IA), TS("cmp",IA), TNS("%ds:",OVERRIDE), TNSx("aas",NORM),
}, {
/* [4,0] */ TSx("inc",R), TSx("inc",R), TSx("inc",R), TSx("inc",R),
/* [4,4] */ TSx("inc",R), TSx("inc",R), TSx("inc",R), TSx("inc",R),