Author: markj
Date: Thu Sep 22 04:49:31 2016
New Revision: 306157
URL: https://svnweb.freebsd.org/changeset/base/306157
Log:
Annotate syscall provider pointer arguments with the "userland" keyword.
This causes dtrace to automatically copyin arguments from userland, so
one no longer has to explicitly use the copyin() action to do so. Moreover,
copyin() on userland addresses is a no-op, so existing scripts should be
unaffected by this change.
Discussed with: rstone
MFC after: 2 weeks
Modified:
head/sys/kern/makesyscalls.sh
Modified: head/sys/kern/makesyscalls.sh
==============================================================================
--- head/sys/kern/makesyscalls.sh Thu Sep 22 03:35:02 2016
(r306156)
+++ head/sys/kern/makesyscalls.sh Thu Sep 22 04:49:31 2016
(r306157)
@@ -418,7 +418,10 @@ s/\$//g
for (i = 1; i <= argc; i++) {
arg = argtype[i]
sub("__restrict$", "", arg)
- printf("\t\tcase %d:\n\t\t\tp =
\"%s\";\n\t\t\tbreak;\n", i - 1, arg) > systracetmp
+ if (index(arg, "*") > 0)
+ printf("\t\tcase %d:\n\t\t\tp =
\"userland %s\";\n\t\t\tbreak;\n", i - 1, arg) > systracetmp
+ else
+ printf("\t\tcase %d:\n\t\t\tp =
\"%s\";\n\t\t\tbreak;\n", i - 1, arg) > systracetmp
if (index(arg, "*") > 0 || arg == "caddr_t")
printf("\t\tuarg[%d] = (intptr_t)
p->%s; /* %s */\n", \
i - 1, \
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