| # Copyright 2019-2021 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/>. |
| |
| # Test GDB for RISC-V always uses an uncompressed breakpoint when |
| # setting up for an inferior call. |
| |
| if {![istarget "riscv*-*-*"]} { |
| verbose "Skipping ${gdb_test_file_name}." |
| return |
| } |
| |
| standard_testfile |
| |
| if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} { |
| return -1 |
| } |
| |
| if ![runto_main] then { |
| return 0 |
| } |
| |
| # Figure out where the breakpoint will be placed taking account for |
| # stack alignment, and allocation of the dummy code area. |
| set bp_addr [get_valueof "/x" "\$sp" 0] |
| set bp_addr [format 0x%x [expr ($bp_addr & ~0xf) - 0x20]] |
| |
| # Fill the region we know will be used as the scratch area with the |
| # compressed nop instruction. If GDB fails to overwrite this with an |
| # uncompressed nop then a compressed breakpoint will be used in the |
| # following inferior call. |
| for {set i 0} {$i < 16} {incr i 2} { |
| gdb_test_no_output "set *((unsigned short *) (${bp_addr} + $i))=0x1" \ |
| "place compressed nop in scratch area at offset $i" |
| } |
| |
| # Make an inferior call. GDB should write an uncompressed nop into |
| # the scratch area and so force the use of an uncompressed breakpoint, |
| # however, if this mechanism fails and GDB uses a compressed |
| # breakpoint, and the target doesn't support compressed instructions, |
| # then we would expect weird things to happen here. |
| gdb_test_no_output "set debug riscv breakpoints 1" |
| gdb_test "call dummy_call ()" \ |
| ".*Using EBREAK for breakpoint at $bp_addr \\(instruction length 4\\).*" |