forked from Imagelibrary/binutils-gdb
75 lines
2.6 KiB
Plaintext
75 lines
2.6 KiB
Plaintext
# Copyright 2008-2023 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. It tests reverse stepping.
|
|
#
|
|
# reverse-next over a function call sets a step-resume breakpoint at
|
|
# callee's entry point, runs to it, and then does an extra single-step
|
|
# to get at the callee's caller. Test that a user breakpoint set at
|
|
# the same location as the step-resume breakpoint isn't ignored.
|
|
#
|
|
# The test sets a breakpoint with the command break *callee to set a
|
|
# breakpoint on the first instruction of the function. The issue is on
|
|
# PowerPC it uses Global Entry Points (GEP) and Local Entry Points (LEP).
|
|
# The GEP is the first instruction in the function. It sets up register
|
|
# r2 and then reaches the LEP.
|
|
#
|
|
# <callee>:
|
|
# lis r2,4098 <- GEP
|
|
# addi r2,r2,32512
|
|
# mflr r0 <- LEP
|
|
# std r0,16(r1)
|
|
|
|
#
|
|
# The command break *callee sets the breakpoint on the GEP. Calling
|
|
# the function with callee() will enter the function via the LEP. So,
|
|
# this test needs to use a function pointer to call callee() so the
|
|
# function will be entered via the GEP to work as designed on PowerPC in
|
|
# addition to non-PowerPC systems. On non-PowerPC systems, the GEP and LEP
|
|
# are the same.
|
|
|
|
require supports_reverse
|
|
|
|
standard_testfile
|
|
|
|
if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
|
|
return -1
|
|
}
|
|
|
|
if {![runto_main]} {
|
|
return 0
|
|
}
|
|
|
|
if [supports_process_record] {
|
|
# Activate process record/replay
|
|
gdb_test_no_output "record" "turn on process record"
|
|
}
|
|
|
|
# Stop after the function pointer call to test the reverse-next command.
|
|
set lineno [gdb_get_line_number "END OF MAIN"]
|
|
gdb_test "advance $lineno" ".*END OF MAIN.*" \
|
|
"get past callee call"
|
|
|
|
gdb_test "b \*callee" "" "set breakpoint at callee's entry"
|
|
|
|
set bpnum [get_integer_valueof "\$bpnum" 0]
|
|
gdb_test "reverse-next" \
|
|
"Breakpoint $bpnum, callee.*" \
|
|
"reverse-next over call trips user breakpoint at function entry"
|
|
|
|
gdb_test "up" \
|
|
".*FUNCTION PTR CALL TO CALLEE.*" \
|
|
"stopped at the right callee call"
|