Update copyright year range in header of all files managed by GDB

[thirdparty/binutils-gdb.git] / gdb / testsuite / gdb.reverse / finish-reverse-bkpt.exp

diff --git a/gdb/testsuite/gdb.reverse/finish-reverse-bkpt.exp b/gdb/testsuite/gdb.reverse/finish-reverse-bkpt.exp
index 2417c009102b052fb0c912eac0892b0cd87553ff..e1137f67bab2c2a85b2f96400224c5dcc0295b36 100644 (file)
--- a/gdb/testsuite/gdb.reverse/finish-reverse-bkpt.exp
+++ b/gdb/testsuite/gdb.reverse/finish-reverse-bkpt.exp
@@ -1,4 +1,4 @@
-# Copyright 2008-2017 Free Software Foundation, Inc.
+# Copyright 2008-2024 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,18 +19,36 @@
 # the functions entry would be ignored.  Make sure the bug doesn't
 # reappear.
 
-if ![supports_reverse] {
-    return
-}
+# The test sets a breakpoint with the command break *void_func to set a
+# breakpoint on the first instruction of the function.  The issue is on
+# PowerPC it uses Global Entry Points (GEP) and Local Entry Points (LEP).
+# The GEP is the first instruction in the function.  It sets up register
+# r2 and then reaches the LEP.
+#
+#   <void_func>:
+#      lis     r2,4098        <- GEP
+#      addi    r2,r2,32512
+#      mflr    r0             <- LEP
+#      std     r0,16(r1)
+#        ....
+
+#
+# The command break *void_func sets the breakpoint on the GEP.  Calling
+# the function with void_func() will enter the function via the LEP.  So,
+# this test needs to use a function pointer to call void_func() so the
+# function will be entered via the GEP to work as designed on PowerPC in
+# addition to non-PowerPC systems.  On non-PowerPC systems, the GEP and LEP
+# are the same.
+
+require supports_reverse
 
-standard_testfile finish-reverse.c
+standard_testfile
 
 if { [prepare_for_testing "failed to prepare" "$testfile" $srcfile] } {
     return -1
 }
 
-if ![runto_main] then {
-    fail "can't run to main"
+if {![runto_main]} {
     return 0
 }
 
@@ -39,6 +57,7 @@ if [supports_process_record] {
     gdb_test_no_output "record" "turn on process record"
 }
 
+# Start the test.
 set breakloc [gdb_get_line_number "VOID FUNC" "$srcfile"]
 gdb_test "tbreak void_func" \
     "Temporary breakpoint $decimal at .*$srcfile, line $breakloc\." \