import gcc-toolset-9-systemtap-4.1-4.el8

SOURCES/rhbz1732173.patch

@@ -0,0 +1,32 @@
+commit 7be7af0fda3633cd19e499617834cf4a5f51dd55
+Author: William Cohen <wcohen@redhat.com>
+Date:   Tue Jul 23 14:24:14 2019 -0400
+
+    Fix aarch64 to properly access arguments for wrapped syscalls
+    
+    Linux 4.18 added wrappers for aarch64 syscalls that pass a pointer to
+    a struct pt_regs holding the values for the actual arguments.  The
+    syscall tapsets initialize CONTEXT->sregs to point at this data
+    structure.  However, the aarch64 specific register access code was
+    using the CONTEXT->kregs and just getting the processor register state
+    when the kprobe triggered rather than the expected arguments in the
+    data structure being passed into the syscall.  The aarch64 specific
+    register code now gets the syscall arguments from the correct pt_regs
+    structure.
+
+diff --git a/tapset/arm64/registers.stp b/tapset/arm64/registers.stp
+index b2e5649..8773df2 100644
+--- a/tapset/arm64/registers.stp
++++ b/tapset/arm64/registers.stp
+@@ -58,7 +58,10 @@ function uarch_bytes:long() {
+ function _stp_get_register_by_offset:long (offset:long) %{ /* pure */
+ 	long value;
+ 	struct pt_regs *regs;
+-	regs = (CONTEXT->user_mode_p ? CONTEXT->uregs : CONTEXT->kregs);
++	if (CONTEXT->sregs)
++	  regs = CONTEXT->sregs;
++	else
++	  regs = (CONTEXT->user_mode_p ? CONTEXT->uregs : CONTEXT->kregs);
+ 	if (!regs) {
+ 		CONTEXT->last_error = "No registers available in this context";
+ 		return;

SPECS/systemtap.spec

@@ -77,7 +77,7 @@
 
 Name: %{?scl_prefix}systemtap
 Version: 4.1
-Release: 1%{?dist}
+Release: 4%{?dist}
 # for version, see also configure.ac
 
 
@@ -114,6 +114,7 @@ URL: http://sourceware.org/systemtap/
 Source: ftp://sourceware.org/pub/systemtap/releases/systemtap-%{version}.tar.gz
 
 Patch10: pr23074.patch
+Patch11: rhbz1732173.patch
 
 
 # Build*
@@ -504,6 +505,7 @@ cd ..
 %endif
 
 %patch10 -p1
+%patch11 -p1
 
 %build
 
@@ -1227,6 +1229,9 @@ done
 
 # PRERELEASE
 %changelog
+* Mon Jul 29 2019 Frank Ch. Eigler <fche@redhat.com> - 4.1-4
+- rhbz1732173 (arm64 syscall parameters)
+
 * Fri Jun 14 2019 Frank Ch. Eigler <fche@redhat.com> - 4.1-2
 - Disable various host-service-related options.
 - Correct GNU_parameter_ref dwarf feature typo.