alpha: enhance decoding of getxpid, getxuid, and getxgid syscalls
Print the second return value of getxpid, getxuid, and getxgid syscalls
that return a pair of values using the same mechanism as pipe syscall.
* alpha.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* linux/alpha/syscallent.h [20]: Change SEN(getpid) to SEN(getxpid).
[24]: Change SEN(getuid) to SEN(getxuid).
[47]: Change SEN(getgid) to SEN(getxgid).
* NEWS: Mention this enhancement.
* tests/uid.awk: Update for getxgid output change.
* tests/uid.test: Cleanup.
* tests/getxxid.c: New file.
* tests/getxxid.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add getxxid.
(TESTS): Add getxxid.test.
* tests/.gitignore: Add getxxid.
diff --git a/NEWS b/NEWS
index 731b4d4..eefd066 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,7 @@
* Improvements
* Enhanced decoding of personality, sched_getaffinity,
and sched_setaffinity syscalls.
+ * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
* Bug fixes
* Fixed build on arc, metag, nios2, or1k, and tile architectures.