derek.holloway
7502bf64a4
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53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
# Copyright 2019-2024 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test GDB for RISC-V always uses an uncompressed breakpoint when
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# setting up for an inferior call.
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require {istarget "riscv*-*-*"}
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standard_testfile
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
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return -1
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}
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if {![runto_main]} {
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return 0
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}
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# Figure out where the breakpoint will be placed taking account for
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# stack alignment, and allocation of the dummy code area.
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set bp_addr [get_valueof "/x" "\$sp" 0]
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set bp_addr [format 0x%x [expr ($bp_addr & ~0xf) - 0x20]]
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# Fill the region we know will be used as the scratch area with the
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# compressed nop instruction. If GDB fails to overwrite this with an
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# uncompressed nop then a compressed breakpoint will be used in the
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# following inferior call.
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for {set i 0} {$i < 16} {incr i 2} {
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gdb_test_no_output "set *((unsigned short *) (${bp_addr} + $i))=0x1" \
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"place compressed nop in scratch area at offset $i"
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}
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# Make an inferior call. GDB should write an uncompressed nop into
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# the scratch area and so force the use of an uncompressed breakpoint,
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# however, if this mechanism fails and GDB uses a compressed
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# breakpoint, and the target doesn't support compressed instructions,
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# then we would expect weird things to happen here.
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gdb_test_no_output "set debug riscv breakpoints 1"
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gdb_test "call dummy_call ()" \
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".*Using EBREAK for breakpoint at $bp_addr \\(instruction length 4\\).*"
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