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1d506c26 | 1 | # Copyright 2008-2024 Free Software Foundation, Inc. |
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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 | # This file is part of the GDB testsuite. It tests reverse stepping. | |
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17 | # |
18 | # reverse-next over a function call sets a step-resume breakpoint at | |
19 | # callee's entry point, runs to it, and then does an extra single-step | |
20 | # to get at the callee's caller. Test that a user breakpoint set at | |
21 | # the same location as the step-resume breakpoint isn't ignored. | |
22 | # | |
c367d9e0 CL |
23 | # The test sets a breakpoint with the command break *callee to set a |
24 | # breakpoint on the first instruction of the function. The issue is on | |
25 | # PowerPC it uses Global Entry Points (GEP) and Local Entry Points (LEP). | |
26 | # The GEP is the first instruction in the function. It sets up register | |
27 | # r2 and then reaches the LEP. | |
28 | # | |
29 | # <callee>: | |
30 | # lis r2,4098 <- GEP | |
31 | # addi r2,r2,32512 | |
32 | # mflr r0 <- LEP | |
33 | # std r0,16(r1) | |
34 | ||
35 | # | |
36 | # The command break *callee sets the breakpoint on the GEP. Calling | |
37 | # the function with callee() will enter the function via the LEP. So, | |
38 | # this test needs to use a function pointer to call callee() so the | |
39 | # function will be entered via the GEP to work as designed on PowerPC in | |
40 | # addition to non-PowerPC systems. On non-PowerPC systems, the GEP and LEP | |
41 | # are the same. | |
2c03e5be | 42 | |
5954db83 | 43 | require supports_reverse |
2c03e5be | 44 | |
c367d9e0 | 45 | standard_testfile |
2c03e5be | 46 | |
5b362f04 | 47 | if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } { |
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48 | return -1 |
49 | } | |
50 | ||
bde43e8d | 51 | if {![runto_main]} { |
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52 | return 0 |
53 | } | |
54 | ||
d3895d7d | 55 | if [supports_process_record] { |
2c03e5be | 56 | # Activate process record/replay |
9f058c10 | 57 | gdb_test_no_output "record" "turn on process record" |
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58 | } |
59 | ||
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60 | # Stop after the function pointer call to test the reverse-next command. |
61 | set lineno [gdb_get_line_number "END OF MAIN"] | |
62 | gdb_test "advance $lineno" ".*END OF MAIN.*" \ | |
63 | "get past callee call" | |
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64 | |
65 | gdb_test "b \*callee" "" "set breakpoint at callee's entry" | |
66 | ||
bde47561 | 67 | set bpnum [get_integer_valueof "\$bpnum" 0] |
2c03e5be | 68 | gdb_test "reverse-next" \ |
bde47561 | 69 | "Breakpoint $bpnum, callee.*" \ |
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70 | "reverse-next over call trips user breakpoint at function entry" |
71 | ||
72 | gdb_test "up" \ | |
c367d9e0 | 73 | ".*FUNCTION PTR CALL TO CALLEE.*" \ |
2c03e5be | 74 | "stopped at the right callee call" |