mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
1fe8486103
This will allow the unwind info to explicitly specify a different value for the return address from the link register. Such usage, although uncommon, is valid and useful for signal frames. It is also supported by aadwarf64 from ARM (Note 9 in [1]). Ref https://sourceware.org/pipermail/gdb/2022-May/050091.html [1] https://github.com/ARM-software/abi-aa/blob/2022Q1/aadwarf64/aadwarf64.rst#dwarf-register-names Signed-off-by: Luis Machado <luis.machado@arm.com>
71 lines
2.0 KiB
Plaintext
71 lines
2.0 KiB
Plaintext
# Copyright 2022 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 explicitly unwinding the PC DWARF register on aarch64
|
|
|
|
if {![is_aarch64_target]} then {
|
|
verbose "Skipping ${gdb_test_file_name}."
|
|
return
|
|
}
|
|
|
|
standard_testfile .S
|
|
|
|
if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
|
|
return -1
|
|
}
|
|
|
|
if ![runto_main] {
|
|
return -1
|
|
}
|
|
|
|
proc test_reg_vals {} {
|
|
gdb_test "p \$pc - &main" "= 8" "p \$pc"
|
|
gdb_test "p/x \$x30" "= 0x1234" "p \$x30"
|
|
}
|
|
|
|
proc test_unwind_pc { inst } {
|
|
gdb_test "si" "$inst" "single step"
|
|
gdb_test "backtrace" \
|
|
".*#1.*in main ().*" \
|
|
"backtrace"
|
|
gdb_test "up" "in main ().*" "parent frame"
|
|
test_reg_vals
|
|
}
|
|
|
|
# Ready to enter the function
|
|
gdb_test "si" "bl test_func" "call site"
|
|
# Step through the 3 instructions in the function to make sure that
|
|
# we have the same unwind info throughout.
|
|
with_test_prefix "1st stepi" {
|
|
test_unwind_pc "mov x0, x30"
|
|
}
|
|
with_test_prefix "2nd stepi" {
|
|
test_unwind_pc "mov x30, 0x1234"
|
|
}
|
|
with_test_prefix "3rd stepi" {
|
|
test_unwind_pc "ret x0"
|
|
}
|
|
# Check again after we returned
|
|
with_test_prefix "final" {
|
|
# Check that we've stepped out (si prints out the new function name)
|
|
gdb_test "si" ".*main *().*" "single step out"
|
|
gdb_test "backtrace" \
|
|
"#0\[\t \]+main ().*" \
|
|
"backtrace"
|
|
test_reg_vals
|
|
}
|