| # Copyright (C) 2018-2021 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 |
| # the Free Software Foundation; either version 3 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| # This file is part of the gdb testsuite. |
| |
| # Test access to special purpose registers PPR and DSCR. The test |
| # inferior writes to these registers, we check that GDB reads the same |
| # values, then write to the registers trough GDB, step once, and check |
| # again if we read back the same values. |
| |
| if {![istarget "powerpc*-*-linux*"]} then { |
| verbose "Skipping PowerPC test for PPR and DSCR registers." |
| return |
| } |
| |
| standard_testfile .c |
| |
| if {[build_executable "compile" $binfile $srcfile {debug}] == -1} { |
| return |
| } |
| |
| proc check_register_access { regname } { |
| global gdb_prompt |
| |
| set test "$regname register access" |
| gdb_test_multiple "info reg $regname" "$test" { |
| -re "Invalid register.*\r\n$gdb_prompt $" { |
| unsupported "$test" |
| return 0 |
| } |
| -re "\r\n$regname.*\r\n$gdb_prompt $" { |
| pass "$test" |
| return 1 |
| } |
| } |
| return 0 |
| } |
| |
| # Do one pass to check if the instructions in our test programs are |
| # available to this processor (e.g. mtspr 3, RS for accessing DSCR). |
| proc ppr_dscr_available {} { |
| global gdb_prompt |
| global inferior_exited_re |
| |
| set test "PPR/DSCR available to inferior" |
| gdb_test_multiple "continue" "" { |
| -re "Illegal instruction.*\r\n$gdb_prompt $" { |
| unsupported "$test" |
| return 0 |
| } |
| -re "$inferior_exited_re normally.*$gdb_prompt $" { |
| pass "$test" |
| return 1 |
| } |
| } |
| return 0 |
| } |
| |
| with_test_prefix "check PPR/DSCR access" { |
| clean_restart $binfile |
| |
| if ![runto_main] { |
| return |
| } |
| |
| if {![check_register_access "ppr"]} { |
| return |
| } |
| |
| if {![check_register_access "dscr"]} { |
| return |
| } |
| |
| if {![ppr_dscr_available]} { |
| return |
| } |
| } |
| |
| # Now do the actual test |
| clean_restart $binfile |
| |
| if ![runto_main] { |
| return |
| } |
| |
| gdb_breakpoint [gdb_get_line_number "marker"] |
| |
| gdb_continue_to_breakpoint "continue to marker" |
| |
| # At the breakpoint the inferior should have set the |
| # registers to these expected values. |
| |
| with_test_prefix "before write" { |
| gdb_test "info reg dscr" "dscr.*0x0*20\[ \t\]+.*" |
| gdb_test "info reg ppr" "ppr.*0x0*8000000000000\[ \t\]+.*" |
| } |
| |
| # Set Store Stream Enable in DSCR and set PPR to the medium-low |
| # priority. |
| gdb_test_no_output "set \$dscr = 0x8" |
| gdb_test_no_output "set \$ppr = 0xC000000000000" |
| |
| gdb_test "stepi" "asm.*" |
| |
| with_test_prefix "after write" { |
| gdb_test "info reg dscr" "dscr.*0x0*8+\[ \t\]+.*" |
| gdb_test "info reg ppr" "ppr.*0x0*\[cC\]000000000000\[ \t\]+.*" |
| } |