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      1 # Copyright 2017-2024 Free Software Foundation, Inc.
      2 #
      3 # This program is free software; you can redistribute it and/or modify
      4 # it under the terms of the GNU General Public License as published by
      5 # the Free Software Foundation; either version 3 of the License, or
      6 # (at your option) any later version.
      7 #
      8 # This program is distributed in the hope that it will be useful,
      9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11 # GNU General Public License for more details.
     12 #
     13 # You should have received a copy of the GNU General Public License
     14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     15 #
     16 # This file is part of the gdb testsuite.
     17 
     18 # Test single stepping through POWER8/ISA 2.07 atomic sequences beginning with
     19 # a lbarx/lharx/lqarx instruction and ending with a stbcx/sthcx/stqxc
     20 # instruction.  Note that although lbarx, lharx, stbcx and sthcx instructions
     21 # were introduced in ISA 2.06, they were implemented only in POWER8 (ISA 2.07).
     22 
     23 
     24 require {istarget "powerpc*"} is_lp64_target
     25 
     26 standard_testfile  .c .S
     27 
     28 if { [prepare_for_testing "failed to prepare" $testfile "$srcfile $srcfile2" \
     29       {debug quiet}] } {
     30     return -1
     31 }
     32 
     33 # The test proper.  DISPLACED is true if we should try with displaced
     34 # stepping.
     35 
     36 proc do_test { displaced } {
     37     global decimal hex
     38     global gdb_prompt inferior_exited_re srcfile srcfile2
     39 
     40     if {![runto_main]} {
     41 	return -1
     42     }
     43 
     44     gdb_test_no_output "set displaced-stepping $displaced"
     45 
     46     gdb_breakpoint "test_atomic_sequences" "Breakpoint $decimal at $hex" \
     47 	"set the breakpoint at the start of the test function"
     48 
     49     gdb_test_multiple "continue" "Continue until lbarx/stbcx start breakpoint" {
     50       -re "$inferior_exited_re with code 01.\[\r\n\]+$gdb_prompt $" {
     51 	unsupported "POWER8/ISA 2.07 atomic instructions not supported."
     52 	return -1
     53       }
     54       -re "Continuing.*Breakpoint $decimal.*$gdb_prompt $" {
     55 	pass "continue until test_atomic_sequences function"
     56       }
     57     }
     58 
     59     set bp1 [gdb_get_line_number "lbarx" "$srcfile2"]
     60     gdb_breakpoint "$bp1" "Breakpoint $decimal at $hex" \
     61 	"set the breakpoint at the start of the lbarx/stbcx sequence"
     62 
     63     set bp2 [gdb_get_line_number "lharx" "$srcfile2"]
     64     gdb_breakpoint "$bp2" "Breakpoint $decimal at $hex" \
     65 	"set the breakpoint at the start of the lharx/sthcx sequence"
     66 
     67     set bp3 [gdb_get_line_number "lqarx" "$srcfile2"]
     68     gdb_breakpoint "$bp3" "Breakpoint $decimal at $hex" \
     69 	"set the breakpoint at the start of the lqarx/stqcx sequence"
     70 
     71     gdb_test continue "Continuing.*Breakpoint $decimal.*" \
     72 	"continue until lbarx/stbcx start breakpoint"
     73 
     74     gdb_test nexti "bne.*1b" \
     75 	"step through the lbarx/stbcx sequence"
     76 
     77     gdb_test continue "Continuing.*Breakpoint $decimal.*" \
     78 	"continue until lharx/sthcx start breakpoint"
     79 
     80     gdb_test nexti "bne.*2b" \
     81 	"step through the lharx/sthcx sequence"
     82 
     83     gdb_test continue "Continuing.*Breakpoint $decimal.*" \
     84 	"continue until ldqrx/stqcx start breakpoint"
     85 
     86     gdb_test nexti "bne.*3b" \
     87 	"step through the lqarx/stqcx sequence"
     88 }
     89 
     90 foreach displaced { "off" "on" } {
     91     with_test_prefix "displaced=$displaced" {
     92 	do_test $displaced
     93     }
     94 }
     95