projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| b811d2c2 | 1 | # Copyright 2019-2020 Free Software Foundation, Inc. |
| 01e175fe AB |
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 | # Test GDB for RISC-V always uses an uncompressed breakpoint when | |
| 17 | # setting up for an inferior call. | |
| 18 | ||
| 19 | if {![istarget "riscv*-*-*"]} { | |
| 20 | verbose "Skipping ${gdb_test_file_name}." | |
| 21 | return | |
| 22 | } | |
| 23 | ||
| 24 | standard_testfile | |
| 25 | ||
| 26 | if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} { | |
| 27 | return -1 | |
| 28 | } | |
| 29 | ||
| 30 | if ![runto_main] then { | |
| 31 | fail "can't run to main" | |
| 32 | return 0 | |
| 33 | } | |
| 34 | ||
| 35 | # Figure out where the breakpoint will be placed taking account for | |
| 36 | # stack alignment, and allocation of the dummy code area. | |
| 37 | set bp_addr [get_valueof "/x" "\$sp" 0] | |
| 38 | set bp_addr [format 0x%x [expr ($bp_addr & ~0xf) - 0x20]] | |
| 39 | ||
| 40 | # Fill the region we know will be used as the scratch area with the | |
| 41 | # compressed nop instruction. If GDB fails to overwrite this with an | |
| 42 | # uncompressed nop then a compressed breakpoint will be used in the | |
| 43 | # following inferior call. | |
| 44 | for {set i 0} {$i < 16} {incr i 2} { | |
| 45 | gdb_test_no_output "set *((unsigned short *) (${bp_addr} + $i))=0x1" \ | |
| 46 | "place compressed nop in scratch area at offset $i" | |
| 47 | } | |
| 48 | ||
| 49 | # Make an inferior call. GDB should write an uncompressed nop into | |
| 50 | # the scratch area and so force the use of an uncompressed breakpoint, | |
| 51 | # however, if this mechanism fails and GDB uses a compressed | |
| 52 | # breakpoint, and the target doesn't support compressed instructions, | |
| 53 | # then we would expect weird things to happen here. | |
| 54 | gdb_test_no_output "set debug riscv breakpoints 1" | |
| 55 | gdb_test "call dummy_call ()" \ | |
| 56 | ".*Using EBREAK for breakpoint at $bp_addr \\(instruction length 4\\).*" |