gdb/testsuite/gdb.base/break-interp.exp

   1 # Copyright 2010 Free Software Foundation, Inc.
   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 test only works on GNU/Linux.
  17 if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} {
  18     continue
  19 }
  20
  21 load_lib prelink-support.exp
  22
  23 set test "break-interp"
  24 set binprefix ${objdir}/${subdir}/${test}
  25 # Only to get the $interp_system name.
  26 set srcfile_test "start.c"
  27 set binfile_test ${test}-test
  28 set binfile_lib ${objdir}/${subdir}/${test}.so
  29 set srcfile "${test}-main.c"
  30 set srcfile_lib "${test}-lib.c"
  31
  32 if [get_compiler_info ${binfile_lib}] {
  33     return -1
  34 }
  35
  36 # Use -soname so that the new library gets copied by build_executable_own_libs.
  37
  38 if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} {
  39     return -1
  40 }
  41
  42 if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
  43     return -1
  44 }
  45
  46 # Note: The separate debug info file content build-id/crc32 are not verified
  47 # contrary to the GDB search algorithm skipping non-matching ones.
  48 proc system_debug_get {exec} {
  49     global debug_root
  50
  51     set exec_build_id_debug [build_id_debug_filename_get $exec]
  52     set debug_base "[file tail $exec].debug"
  53     set exec_dir [file dirname $exec]
  54
  55     # isfile returns 1 even for symlinks to files.
  56     set retval $debug_root/$exec_build_id_debug
  57     if [file isfile $retval] {
  58         return $retval
  59     }
  60     set retval $exec_dir/$debug_base
  61     if [file isfile $retval] {
  62         return $retval
  63     }
  64     set retval $exec_dir/.debug/$debug_base
  65     if [file isfile $retval] {
  66         return $retval
  67     }
  68     set retval $debug_root/$exec_dir/$debug_base
  69     if [file isfile $retval] {
  70         return $retval
  71     }
  72     return ""
  73 }
  74
  75 gdb_exit
  76 gdb_start
  77 set debug_root ""
  78 set test "show debug-file-directory"
  79 gdb_test_multiple $test $test {
  80     -re "The directory where separate debug symbols are searched for is \"(.*)\".\r\n$gdb_prompt $" {
  81         set debug_root $expect_out(1,string)
  82     }
  83 }
  84
  85 set interp_system [section_get ${objdir}/${subdir}/$binfile_test .interp]
  86 set interp_system_debug [system_debug_get $interp_system]
  87 verbose -log "$interp_system has debug $interp_system_debug"
  88
  89 proc prelinkNO {arg {name ""}} {
  90     return [prelink_no $arg $name]
  91 }
  92
  93 proc prelinkYES {arg {name ""}} {
  94     return [prelink_yes $arg $name]
  95 }
  96
  97 proc strip_debug {dest} {
  98     set test "strip [file tail $dest]"
  99     set strip_program [transform strip]
 100     set command "exec $strip_program --strip-debug $dest"
 101     verbose -log "command is $command"
 102     if [catch $command] {
 103         fail $test
 104         return 0
 105     } else {
 106         pass $test
 107         return 1
 108     }
 109 }
 110
 111 # Implementation of reach.
 112
 113 proc reach_1 {func command displacement} {
 114     global gdb_prompt expect_out
 115
 116     if {$func == "_dl_debug_state"} {
 117         # Breakpoint on _dl_debug_state can have problems due to its overlap
 118         # with the existing internal breakpoint from GDB.
 119         gdb_test_no_output "set stop-on-solib-events 1"
 120     } elseif {! [gdb_breakpoint $func allow-pending]} {
 121         return
 122     }
 123
 124     set test "reach"
 125     set test_displacement "seen displacement message as $displacement"
 126     set debug_state_count 0
 127     gdb_test_multiple $command $test {
 128         -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
 129             # Missing "$gdb_prompt $" is intentional.
 130             if {$expect_out(1,string) == "0x0"} {
 131                 set case "ZERO"
 132             } else {
 133                 set case "NONZERO"
 134             }
 135             if {$displacement == $case || $displacement == "PRESENT"} {
 136                 pass $test_displacement
 137                 set displacement "FOUND-$displacement"
 138             } else {
 139                 fail $test_displacement
 140             }
 141             exp_continue
 142         }
 143         -re "Breakpoint \[0-9\]+, \\.?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
 144             if {$func == "_dl_debug_state"} {
 145                 fail $test
 146             } else {
 147                 pass $test
 148             }
 149         }
 150         -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?$func \\(\\).*\r\n$gdb_prompt $" {
 151             if {$func == "_dl_debug_state"} {
 152                 fail $test
 153             } else {
 154                 pass $test
 155             }
 156         }
 157         -re "Stopped due to shared library event\r\n$gdb_prompt $" {
 158             if {$func == "_dl_debug_state"} {
 159                 if {$debug_state_count == 0} {
 160                     # First stop does not yet relocate the _start function
 161                     # descriptor on ppc64.
 162                     set debug_state_count 1
 163                     send_gdb "continue\n"
 164                     exp_continue
 165                 } else {
 166                     pass $test
 167                 }
 168             } else {
 169                 fail $test
 170             }
 171         }
 172     }
 173     if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 174         fail $test_displacement
 175     }
 176
 177     if {$func == "_dl_debug_state"} {
 178         gdb_test_no_output "set stop-on-solib-events 0"
 179     }
 180 }
 181
 182 # `runto' does not check we stopped really at the function we specified.
 183 # DISPLACEMENT can be "NONE" for no message to be present, "ZERO" for
 184 # displacement of 0 bytes to be present, "NONZERO" for displacement of non-0
 185 # bytes to be present and "PRESENT" if both "ZERO" and "NONZERO" are valid.
 186 proc reach {func command displacement} {
 187     global pf_prefix
 188     set old_ldprefix $pf_prefix
 189     lappend pf_prefix "reach-$func:"
 190
 191     reach_1 $func $command $displacement
 192
 193     set pf_prefix $old_ldprefix
 194 }
 195
 196 proc test_core {file displacement} {
 197     global srcdir subdir gdb_prompt expect_out
 198
 199     set corefile [core_find $file {} "segv"]
 200     if {$corefile == ""} {
 201         return
 202     }
 203
 204     global pf_prefix
 205     set old_ldprefix $pf_prefix
 206     lappend pf_prefix "core:"
 207
 208     gdb_exit
 209     gdb_start
 210     # Clear it to never find any separate debug infos in $debug_root.
 211     gdb_test_no_output "set debug-file-directory" \
 212         "set debug-file-directory for core"
 213     gdb_reinitialize_dir $srcdir/$subdir
 214     gdb_load $file
 215
 216     # Print the "PIE (Position Independent Executable) displacement" message.
 217     gdb_test_no_output "set verbose on"
 218
 219     set test "core loaded"
 220     set test_displacement "seen displacement message as $displacement"
 221     gdb_test_multiple "core-file $corefile" $test {
 222         -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
 223             # Missing "$gdb_prompt $" is intentional.
 224             if {$expect_out(1,string) == "0x0"} {
 225                 set case "ZERO"
 226             } else {
 227                 set case "NONZERO"
 228             }
 229             if {$displacement == $case || $displacement == "PRESENT"} {
 230                 pass $test_displacement
 231                 set displacement "FOUND-$displacement"
 232             } else {
 233                 fail $test_displacement
 234             }
 235             exp_continue
 236         }
 237         -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {
 238             # Do not check the binary filename as it may be truncated.
 239             pass $test
 240         }
 241     }
 242     if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 243         fail $test_displacement
 244     }
 245
 246     gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
 247
 248     set pf_prefix $old_ldprefix
 249 }
 250
 251 proc test_attach_gdb {file pid displacement prefix} {
 252     global gdb_prompt expect_out
 253
 254     global pf_prefix
 255     set old_ldprefix $pf_prefix
 256     lappend pf_prefix "$prefix:"
 257
 258     gdb_exit
 259     gdb_start
 260
 261     # Print the "PIE (Position Independent Executable) displacement" message.
 262     gdb_test_no_output "set verbose on"
 263
 264     if {$file != ""} {
 265         gdb_test "file $file" "Reading symbols from .*done\\." "file"
 266     }
 267
 268     set test "attach"
 269     gdb_test_multiple "attach $pid" $test {
 270         -re "Attaching to (program: .*, )?process $pid\r\n" {
 271             # Missing "$gdb_prompt $" is intentional.
 272             pass $test
 273         }
 274     }
 275
 276     set test "attach final prompt"
 277     set test_displacement "seen displacement message as $displacement"
 278     gdb_test_multiple "" $test {
 279         -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
 280             # Missing "$gdb_prompt $" is intentional.
 281             if {$expect_out(1,string) == "0x0"} {
 282                 set case "ZERO"
 283             } else {
 284                 set case "NONZERO"
 285             }
 286             if {$displacement == $case || $displacement == "PRESENT"} {
 287                 pass $test_displacement
 288                 set displacement "FOUND-$displacement"
 289             } else {
 290                 fail $test_displacement
 291             }
 292             exp_continue
 293         }
 294         -re "$gdb_prompt $" {
 295             pass $test
 296         }
 297     }
 298     if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 299         fail $test_displacement
 300     }
 301
 302     gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
 303     gdb_exit
 304
 305     set pf_prefix $old_ldprefix
 306 }
 307
 308 proc test_attach {file displacement {relink_args ""}} {
 309     global board_info
 310
 311     gdb_exit
 312
 313     set test "sleep function started"
 314
 315     set command "${file} sleep"
 316     set res [remote_spawn host $command];
 317     if { $res < 0 || $res == "" } {
 318         perror "Spawning $command failed."
 319         fail $test
 320         return
 321     }
 322     set pid [exp_pid -i $res]
 323     gdb_expect {
 324         -re "sleeping\r\n" {
 325             pass $test
 326         }
 327         eof {
 328             fail "$test (eof)"
 329             return
 330         }
 331         timeout {
 332             fail "$test (timeout)"
 333             return
 334         }
 335     }
 336
 337     if {$relink_args == ""} {
 338         test_attach_gdb "" $pid $displacement "attach"
 339     } else {
 340         # These could be rather passed as arguments.
 341         global exec interp_saved interp
 342
 343         foreach relink {YES NO} {
 344             # Formerly this test was testing only prelinking of $EXEC.  As the
 345             # prelink command automatically prelinks all of $EXEC's libraries,
 346             # even $INTERP got prelinked.  Therefore, we formerly had to
 347             # `[file_copy $interp_saved $interp]' to make $INTERP not affected
 348             # by this prelinking of $EXEC.
 349             #
 350             # But now we need to test even prelinking of $INTERP.  We could
 351             # create a separate test to test just the $INTERP prelinking.  For
 352             # test simplicity, we merged this test and the test above by not
 353             # restoring $INTERP after $EXEC prelink.  $INTERP gets restored
 354             # later below.
 355
 356             if [prelink$relink $relink_args [file tail $exec]] {
 357                 # /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
 358                 test_attach_gdb $exec $pid $displacement "attach-relink$relink"
 359             }
 360         }
 361         file_copy $interp_saved $interp
 362     }
 363
 364     remote_exec host "kill -9 $pid"
 365 }
 366
 367 proc test_ld {file ifmain trynosym displacement} {
 368     global srcdir subdir gdb_prompt expect_out
 369
 370     # First test normal `file'-command loaded $FILE with symbols.
 371
 372     gdb_exit
 373     gdb_start
 374     # Clear it to never find any separate debug infos in $debug_root.
 375     gdb_test_no_output "set debug-file-directory"
 376     gdb_reinitialize_dir $srcdir/$subdir
 377     gdb_load $file
 378
 379     # Print the "PIE (Position Independent Executable) displacement" message.
 380     gdb_test_no_output "set verbose on"
 381
 382     # We want to test the re-run of a PIE in the case where the executable
 383     # is loaded with a different displacement, but disable-randomization
 384     # prevents that from happening.  So turn it off.
 385     gdb_test "set disable-randomization off"
 386
 387     if $ifmain {
 388         gdb_test_no_output "set args segv"
 389     } else {
 390         global objdir binfile_test
 391
 392         # ld.so needs some executable to run to reach _dl_debug_state.
 393         gdb_test_no_output "set args ${objdir}/${subdir}/$binfile_test"
 394     }
 395
 396     reach "_dl_debug_state" "run" $displacement
 397
 398     gdb_test "bt" "#0 +\[^\r\n\]*\\m_dl_debug_state\\M.*" "dl bt"
 399
 400     if $ifmain {
 401         reach "main" continue "NONE"
 402
 403         reach "libfunc" continue "NONE"
 404
 405         gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"
 406     }
 407
 408     # Try re-run if the new PIE displacement takes effect.
 409     gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"
 410     reach "_dl_debug_state" "run" $displacement
 411
 412     if $ifmain {
 413         test_core $file $displacement
 414
 415         test_attach $file $displacement
 416     }
 417
 418     if !$trynosym {
 419         return
 420     }
 421
 422     global pf_prefix
 423     set old_ldprefix $pf_prefix
 424     lappend pf_prefix "symbol-less:"
 425
 426     # Test also `exec-file'-command loaded $FILE - therefore without symbols.
 427     # SYMBOL_OBJFILE is not available and only EXEC_BFD must be used.
 428
 429     gdb_exit
 430     gdb_start
 431     # Clear it to never find any separate debug infos in $debug_root.
 432     gdb_test_no_output "set debug-file-directory"
 433     gdb_reinitialize_dir $srcdir/$subdir
 434
 435     # Print the "PIE (Position Independent Executable) displacement" message.
 436     gdb_test_no_output "set verbose on"
 437
 438     # Test no (error) message has been printed by `exec-file'.
 439     set escapedfile [string_to_regexp $file]
 440     gdb_test "exec-file $file" "exec-file $escapedfile" "load"
 441
 442     if $ifmain {
 443         reach "_dl_debug_state" run $displacement
 444
 445         # Use two separate gdb_expect statements to avoid timeouts due to
 446         # slow processing of wildcard capturing long output
 447         set test "info files"
 448         set entrynohex ""
 449         send_gdb "$test\n"
 450         gdb_expect  {
 451             -re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n" {
 452                 set entrynohex $expect_out(1,string)
 453                 gdb_expect {
 454                     -re "$gdb_prompt $" { pass $test }
 455                     timeout { fail "$test (timeout)" }
 456                 }
 457             }
 458             -re ".*$gdb_prompt $"  { fail $test }
 459             timeout         { fail "$test (timeout)" }
 460         }
 461
 462         # `info sym' cannot be tested for .opd as the binary may not have
 463         # symbols.
 464         if {[istarget powerpc64-*] && [is_lp64_target]} {
 465             set test "convert entry point"
 466             gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test {
 467                 -re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" {
 468                     set entrynohex $expect_out(2,string)
 469                     pass $test
 470                 }
 471             }
 472         }
 473         if {$entrynohex != ""} {
 474             gdb_test "break *0x$entrynohex" "" "break at entry point"
 475             gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
 476         }
 477     } else {
 478         # There is no symbol to break at ld.so.  Moreover it can exit with an
 479         # error code.
 480
 481         set test "ld.so exit"
 482         set test_displacement "seen displacement message as $displacement"
 483         gdb_test_multiple "run" $test {
 484             -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
 485                 # Missing "$gdb_prompt $" is intentional.
 486                 if {$expect_out(1,string) == "0x0"} {
 487                     set case "ZERO"
 488                 } else {
 489                     set case "NONZERO"
 490                 }
 491                 if {$displacement == $case || $displacement == "PRESENT"} {
 492                     pass $test_displacement
 493                     set displacement "FOUND-$displacement"
 494                 } else {
 495                     fail $test_displacement
 496                 }
 497                 exp_continue
 498             }
 499             -re "Program exited (normally|with code \[0-9\]+)\\.\r\n$gdb_prompt $" {
 500                 # Do not check the binary filename as it may be truncated.
 501                 pass $test
 502             }
 503         }
 504         if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 505             fail $test_displacement
 506         }
 507     }
 508
 509     set pf_prefix $old_ldprefix
 510 }
 511
 512 # Create separate binaries for each testcase - to make the possible reported
 513 # problem reproducible after the whole test run finishes.
 514
 515 set old_ldprefix $pf_prefix
 516 foreach ldprelink {NO YES} {
 517     foreach ldsepdebug {NO IN SEP} {
 518         # Skip running the ldsepdebug test if we do not have system separate
 519         # debug info available.
 520         if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
 521             continue
 522         }
 523
 524         set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
 525         set interp $binprefix-$ldname
 526
 527         # prelink needs to always prelink all the dependencies to do any file
 528         # modifications of its files.  ld.so also needs all the dependencies to
 529         # be prelinked to omit the relocation process.  In-memory file offsets
 530         # are not dependent whether ld.so went the prelink way or through the
 531         # relocation process.
 532         #
 533         # For GDB we are not interested whether prelink succeeds as it is
 534         # transparent to GDB.  GDB is being tested for differences of file
 535         # offsets vs. in-memory offsets.  So we have to prelink even ld.so for
 536         # the BIN modification to happen but we need to restore the original
 537         # possibly unprelinked ld.so to test all the combinations for GDB.
 538         set interp_saved ${interp}-saved
 539
 540         set pf_prefix $old_ldprefix
 541         lappend pf_prefix "$ldname:"
 542
 543         if {$ldsepdebug == "NO"} {
 544             file_copy $interp_system $interp
 545             # Never call strip-debug before unprelink:
 546             # prelink: ...: Section .note.gnu.build-id created after prelinking
 547             if ![prelinkNO $interp] {
 548                 continue
 549             }
 550             strip_debug $interp
 551         } elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
 552             file_copy $interp_system $interp
 553         } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
 554             file_copy $interp_system $interp
 555             file_copy $interp_system_debug "${interp}.debug"
 556             # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
 557             if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
 558                 continue
 559             }
 560             set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
 561             set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
 562             verbose -log "command is $command"
 563             if [catch $command] {
 564                 setup_xfail *-*-*
 565                 fail $test
 566                 continue
 567             } else {
 568                 pass $test
 569             }
 570         } elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
 571             file_copy $interp_system $interp
 572             # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
 573             if ![prelinkNO $interp] {
 574                 continue
 575             }
 576             gdb_gnu_strip_debug $interp
 577         } elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
 578             file_copy $interp_system $interp
 579             file_copy $interp_system_debug "${interp}.debug"
 580         }
 581
 582         if {$ldsepdebug == "SEP"} {
 583             if ![prelinkNO "${interp}.debug"] {
 584                 continue
 585             }
 586         } else {
 587             file delete "${interp}.debug"
 588         }
 589
 590         if ![prelink$ldprelink $interp] {
 591             continue
 592         }
 593         if {$ldprelink == "NO"} {
 594             set displacement "NONZERO"
 595         } else {
 596             # x86* kernel loads prelinked PIE binary at its prelinked address
 597             # but ppc* kernel loads it at a random address.  prelink normally
 598             # skips PIE binaries during the system scan.
 599             set displacement "PRESENT"
 600         }
 601         test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
 602
 603         if ![file_copy $interp $interp_saved] {
 604             continue
 605         }
 606         set old_binprefix $pf_prefix
 607         foreach binprelink {NO YES} {
 608             foreach binsepdebug {NO IN SEP} {
 609                 # "ATTACH" is like "YES" but it is modified during run.
 610                 # It cannot be used for problem reproducibility after the
 611                 # testcase ends.
 612                 foreach binpie {NO YES ATTACH} {
 613                     # This combination is not possible, non-PIE (fixed address)
 614                     # binary cannot be prelinked to any (other) address.
 615                     if {$binprelink == "YES" && $binpie == "NO"} {
 616                         continue
 617                     }
 618
 619                     set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
 620                     set exec $binprefix-$binname
 621
 622                     set pf_prefix $old_binprefix
 623                     lappend pf_prefix "$binname:"
 624
 625                     set opts "ldflags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
 626                     if {$binsepdebug != "NO"} {
 627                         lappend opts {debug}
 628                     }
 629                     if {$binpie != "NO"} {
 630                         lappend opts {additional_flags=-fPIE -pie}
 631                     }
 632
 633                     set dir ${exec}.d
 634                     set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]
 635                     if {$relink_args == ""} {
 636                         continue;
 637                     }
 638
 639                     if {$binsepdebug == "SEP"} {
 640                         gdb_gnu_strip_debug $exec
 641                     }
 642
 643                     if {$binpie == "NO"} {
 644                         set displacement "NONE"
 645                     } elseif {$binprelink == "NO"} {
 646                         set displacement "NONZERO"
 647                     } else {
 648                         # x86* kernel loads prelinked PIE binary at its
 649                         # prelinked address but ppc* kernel loads it at
 650                         # a random address.  prelink normally skips PIE
 651                         # binaries during the system scan.
 652                         set displacement "PRESENT"
 653                     }
 654
 655                     if {[prelink$binprelink $relink_args [file tail $exec]]
 656                         && [file_copy $interp_saved $interp]} {
 657                         if {$binpie != "ATTACH"} {
 658                             test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
 659                         } else {
 660                             # If the file has been randomly prelinked it must
 661                             # be "NONZERO".  We could see "ZERO" only if it was
 662                             # unprelinked and it is now running at the same
 663                             # address - which is 0 but executable can never run
 664                             # at address 0.
 665
 666                             set displacement "NONZERO"
 667                             test_attach $exec $displacement $relink_args
 668
 669                             # ATTACH means that executables and libraries have
 670                             # been modified after they have been run.  They
 671                             # cannot be reused for problem reproducibility after
 672                             # the testcase ends in the ATTACH case.  Therefore
 673                             # they are rather deleted not to confuse after the
 674                             # run finishes.
 675                             set exec_debug [system_debug_get $exec]
 676                             if {$exec_debug != ""} {
 677                                 # `file delete [glob "${exec_debug}*"]' does not work.
 678                                 foreach f [glob "${exec_debug}*"] {
 679                                     file delete $f
 680                                 }
 681                             }
 682                             file delete -force $dir
 683                             # `file delete [glob "${exec}*"]' does not work.
 684                             foreach f [glob "${exec}*"] {
 685                                 file delete $f
 686                             }
 687                         }
 688                     }
 689                 }
 690             }
 691         }
 692
 693         file delete $interp_saved
 694     }
 695 }
 696 set pf_prefix $old_ldprefix