svn commit: r348705 - head/sys/cddl/dev/dtrace/amd64
Mariusz Zaborski
oshogbo at FreeBSD.org
Wed Jun 5 22:29:06 UTC 2019
Author: oshogbo
Date: Wed Jun 5 22:29:05 2019
New Revision: 348705
URL: https://svnweb.freebsd.org/changeset/base/348705
Log:
dtrace: 64-bits registers support
The registers in ilumos and FreeBSD have a different number.
In the illumos, last 32-bits register defined is SS an in FreeBSD is GS.
This off-by-one caused the uregs array to returns the wrong 64-bits register
on amd64.
Reviewed by: markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20363
Modified:
head/sys/cddl/dev/dtrace/amd64/dtrace_isa.c
Modified: head/sys/cddl/dev/dtrace/amd64/dtrace_isa.c
==============================================================================
--- head/sys/cddl/dev/dtrace/amd64/dtrace_isa.c Wed Jun 5 21:46:56 2019 (r348704)
+++ head/sys/cddl/dev/dtrace/amd64/dtrace_isa.c Wed Jun 5 22:29:05 2019 (r348705)
@@ -514,7 +514,11 @@ dtrace_getreg(struct trapframe *rp, uint_t reg)
reg = regmap[reg];
} else {
/* This is dependent on reg.d. */
+#ifdef illumos
reg -= SS + 1;
+#else /* !illumos */
+ reg -= GS + 1;
+#endif
}
switch (reg) {
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