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# Copyright 2020 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 skipping a prologue that was generated with gcc's -fcf-protection=full
# (control flow protection) option.
#
# This option places an `endbr32`/`endbr64` instruction at the start of
# all functions, which can interfere with prologue analysis.
standard_testfile .c
set binfile ${binfile}
if { ![istarget x86_64-*-*] && ![istarget i?86-*-*] } {
verbose "Skipping ${testfile}."
return
}
if { ![supports_fcf_protection] } {
untested "-fcf-protection not supported"
return
}
set opts {debug additional_flags=-fcf-protection=full}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $opts] != "" } {
untested "failed to compile"
return
}
clean_restart ${binfile}
# Get start address of function main.
set main_addr [get_integer_valueof &main -1]
gdb_assert {$main_addr != -1}
set bp_addr -1
# Put breakpoint on main, get the address where the breakpoint was installed.
gdb_test_multiple "break main" "break on main, get address" {
-re -wrap "Breakpoint $decimal at ($hex).*" {
set bp_addr $expect_out(1,string)
# Convert to decimal.
set bp_addr [expr $bp_addr]
pass $gdb_test_name
}
}
if { $bp_addr != -1 } {
# Make sure some prologue was skipped.
gdb_assert {$bp_addr > $main_addr}
}
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