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-rw-r--r--stapfuncs.5.in8
1 files changed, 8 insertions, 0 deletions
diff --git a/stapfuncs.5.in b/stapfuncs.5.in
index 994b8c06..04e5ea17 100644
--- a/stapfuncs.5.in
+++ b/stapfuncs.5.in
@@ -365,6 +365,11 @@ rip/ip, rsi/si, rsp/sp;
32-bit registers:
eax, ebp, ebx, ecx, edx, edi, edx, eip, esi, esp, flags/eflags, orig_eax;
segment registers: xcs/cs, xss/ss.
+
+For powerpc, the following names are recognized:
+r1, r2... r31, nip, msr, orig_gpr3, ctr, link, xer, ccr, softe, trap,
+dar, dsisr, result;
+
.TP
u_register:long (name:string)
Same as register(name), except that
@@ -447,6 +452,9 @@ The probed function was built with the gcc \-mregparm=n option.
(The i386 kernel is built with \-mregparm=3, so systemtap considers
regparm(3) the default for kernel functions on that architecture.)
+For some architectures, the *_arg functions may reject unusally high
+values of n.
+
.SS QUEUE_STATS
.PP
The queue_stats tapset provides functions that, given notifications of