mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
730f5068f5
Consider the following test-case:
...
$ cat hello.c
int main()
{
printf("hello ");
#include "world.inc"
$ cat world.inc
printf("world\n");
return 0;
}
$ gcc -g hello.c
...
The line table for the compilation unit, consisting just of
function main, is translated into these two gdb line tables, one for hello.c
and one for world.inc:
...
compunit_symtab: hello.c
symtab: hello.c
INDEX LINE REL-ADDRESS UNREL-ADDRESS IS-STMT PROLOGUE-END EPILOGUE-BEGIN
0 3 0x400557 0x400557 Y
1 4 0x40055b 0x40055b Y
2 END 0x40056a 0x40056a Y
compunit_symtab: hello.c
symtab: world.inc
INDEX LINE REL-ADDRESS UNREL-ADDRESS IS-STMT PROLOGUE-END EPILOGUE-BEGIN
0 1 0x40056a 0x40056a Y
1 2 0x400574 0x400574 Y
2 3 0x400579 0x400579 Y
3 END 0x40057b 0x40057b Y
...
The epilogue of main starts at 0x400579:
...
400579: 5d pop %rbp
40057a: c3 ret
...
Now, say we have an epilogue_begin marker in the line table at 0x400579.
We won't find it using find_epilogue_using_linetable, because it does:
...
const struct symtab_and_line sal = find_pc_line (start_pc, 0);
...
which gets us the line table for hello.c.
Fix this by using "find_pc_line (end_pc - 1, 0)" instead.
Tested on x86_64-linux.
Co-Authored-By: Tom de Vries <tdevries@suse.de>
PR symtab/31622
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31622
3356 lines
87 KiB
Plaintext
3356 lines
87 KiB
Plaintext
# Copyright 2010-2024 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Return true if the target supports DWARF-2 and uses gas.
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# For now pick a sampling of likely targets.
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proc dwarf2_support {} {
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if {[istarget *-*-linux*]
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|| [istarget *-*-gnu*]
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|| [istarget *-*-elf*]
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|| [istarget *-*-openbsd*]
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|| [istarget arm*-*-eabi*]
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|| [istarget powerpc-*-eabi*]} {
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return 1
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}
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return 0
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}
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# Use 'objcopy --extract-dwo to extract DWO information from
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# OBJECT_FILE and place it into DWO_FILE.
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#
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# Return 0 on success, otherwise, return -1.
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proc extract_dwo_information { object_file dwo_file } {
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set objcopy [gdb_find_objcopy]
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set command "$objcopy --extract-dwo $object_file $dwo_file"
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verbose -log "Executing $command"
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set result [catch "exec $command" output]
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verbose -log "objcopy --extract-dwo output: $output"
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if { $result == 1 } {
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return -1
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}
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return 0
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}
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# Use 'objcopy --strip-dwo to remove DWO information from
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# FILENAME.
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#
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# Return 0 on success, otherwise, return -1.
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proc strip_dwo_information { filename } {
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set objcopy [gdb_find_objcopy]
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set command "$objcopy --strip-dwo $filename"
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verbose -log "Executing $command"
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set result [catch "exec $command" output]
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verbose -log "objcopy --strip-dwo output: $output"
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if { $result == 1 } {
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return -1
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}
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return 0
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}
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# Build an executable, with the debug information split out into a
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# separate .dwo file.
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#
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# This function is based on build_executable_from_specs in
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# lib/gdb.exp, but with threading support, and rust support removed.
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#
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# TESTNAME is the name of the test; this is passed to 'untested' if
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# something fails.
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#
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# EXECUTABLE is the executable to create, this can be an absolute
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# path, or a relative path, in which case the EXECUTABLE will be
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# created in the standard output directory.
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#
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# OPTIONS is passed to the final link, using gdb_compile. If OPTIONS
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# contains any option that indicates threads is required, of if the
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# option rust is included, then this function will return failure.
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#
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# ARGS is a series of lists. Each list is a spec for one source file
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# that will be compiled to make EXECUTABLE. Each spec in ARGS has the
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# form:
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# [ SOURCE OPTIONS ]
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# or:
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# [ SOURCE OPTIONS OBJFILE ]
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#
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# Where SOURCE is the path to the source file to compile. This can be
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# absolute, or relative to the standard global ${subdir}/${srcdir}/
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# path.
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#
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# OPTIONS are the options to use when compiling SOURCE into an object
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# file.
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#
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# OBJFILE is optional, if present this is the name of the object file
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# to create for SOURCE. If this is not provided then a suitable name
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# will be auto-generated.
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#
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# If OPTIONS contains the option 'split-dwo' then the debug
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# information is extracted from the object file created by compiling
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# SOURCE and placed into a file with a dwo extension. The name of
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# this file is generated based on the name of the object file that was
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# created (with the .o replaced with .dwo).
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proc build_executable_and_dwo_files { testname executable options args } {
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global subdir
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global srcdir
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if {![regexp "^/" "$executable"]} {
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set binfile [standard_output_file $executable]
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} else {
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set binfile $executable
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}
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set func gdb_compile
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if {[lsearch -regexp $options \
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{^(pthreads|shlib|shlib_pthreads|openmp)$}] != -1} {
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# Currently don't support compiling thread based tests here.
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# If this is required then look to build_executable_from_specs
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# for inspiration.
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return -1
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}
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if {[lsearch -exact $options rust] != -1} {
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# Currently don't support compiling rust tests here. If this
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# is required then look to build_executable_from_specs for
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# inspiration.
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return -1
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}
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# Must be run on local host due to use of objcopy.
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if [is_remote host] {
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return -1
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}
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set objects {}
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set i 0
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foreach spec $args {
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if {[llength $spec] < 2} {
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error "invalid spec length"
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return -1
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}
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verbose -log "APB: SPEC: $spec"
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set s [lindex $spec 0]
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set local_options [lindex $spec 1]
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if {![regexp "^/" "$s"]} {
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set s "$srcdir/$subdir/$s"
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}
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if {[llength $spec] > 2} {
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set objfile [lindex $spec 2]
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} else {
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set objfile "${binfile}${i}.o"
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incr i
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}
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if { [$func "${s}" "${objfile}" object $local_options] != "" } {
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untested $testname
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return -1
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}
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lappend objects "$objfile"
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if {[lsearch -exact $local_options "split-dwo"] >= 0} {
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# Split out the DWO file.
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set dwo_file "[file rootname ${objfile}].dwo"
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if { [extract_dwo_information $objfile $dwo_file] == -1 } {
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untested $testname
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return -1
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}
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if { [strip_dwo_information $objfile] == -1 } {
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untested $testname
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return -1
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}
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}
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}
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verbose -log "APB: OBJECTS = $objects"
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set ret [$func $objects "${binfile}" executable $options]
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if { $ret != "" } {
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untested $testname
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return -1
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}
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return 0
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}
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# Utility function for procs shared_gdb_*.
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proc init_shared_gdb {} {
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global shared_gdb_enabled
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global shared_gdb_started
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if { ! [info exists shared_gdb_enabled] } {
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set shared_gdb_enabled 0
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set shared_gdb_started 0
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}
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}
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# Cluster of four procs:
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# - shared_gdb_enable
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# - shared_gdb_disable
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# - shared_gdb_start_use SRC OPTIONS
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# - shared_gdb_end_use
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#
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# Can be used like so:
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#
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# {
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# if { $share } shared_gdb_enable
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# ...
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# shared_gdb_start_use $src $options
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# ...
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# shared_gdb_end_use
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# ...
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# shared_gdb_start_use $src $options
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# ...
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# shared_gdb_end_use
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# ...
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# if { $share } shared_gdb_disable
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# }
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#
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# to write functionalty that could share ($share == 1) or could not
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# share ($share == 0) a gdb session between two uses.
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proc shared_gdb_enable {} {
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set me shared_gdb_enable
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init_shared_gdb
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global shared_gdb_enabled
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global shared_gdb_started
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if { $shared_gdb_enabled } {
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error "$me: gdb sharing already enabled"
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}
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set shared_gdb_enabled 1
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if { $shared_gdb_started } {
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error "$me: gdb sharing not stopped"
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}
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}
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# See above.
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proc shared_gdb_disable {} {
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init_shared_gdb
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global shared_gdb_enabled
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global shared_gdb_started
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if { ! $shared_gdb_enabled } {
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error "$me: gdb sharing not enabled"
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}
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set shared_gdb_enabled 0
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if { $shared_gdb_started } {
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gdb_exit
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set shared_gdb_started 0
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}
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}
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# Share the current gdb session.
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proc share_gdb { src options } {
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global shared_gdb_started
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global shared_gdb_src
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global shared_gdb_options
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set shared_gdb_started 1
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set shared_gdb_src $src
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set shared_gdb_options $options
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}
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# See above.
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proc shared_gdb_start_use { src options } {
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set me shared_gdb_start_use
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init_shared_gdb
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global shared_gdb_enabled
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global shared_gdb_started
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global shared_gdb_src
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global shared_gdb_options
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set do_start 1
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if { $shared_gdb_enabled && $shared_gdb_started } {
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if { $shared_gdb_src != $src
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|| $shared_gdb_options != $options } {
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error "$me: gdb sharing inconsistent"
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}
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set do_start 0
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}
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if { $do_start } {
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set exe [standard_temp_file func_addr.x]
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gdb_compile $src $exe executable $options
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gdb_exit
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gdb_start
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gdb_load "$exe"
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if { $shared_gdb_enabled } {
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share_gdb $src $options
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}
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}
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}
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# See above.
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proc shared_gdb_end_use {} {
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init_shared_gdb
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global shared_gdb_enabled
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if { ! $shared_gdb_enabled } {
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gdb_exit
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}
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}
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# Enable gdb session sharing within BODY.
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proc with_shared_gdb { body } {
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shared_gdb_enable
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set code [catch { uplevel 1 $body } result]
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shared_gdb_disable
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# Return as appropriate.
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if { $code == 1 } {
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global errorInfo errorCode
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return -code error -errorinfo $errorInfo -errorcode $errorCode $result
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} elseif { $code > 1 } {
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return -code $code $result
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}
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return $result
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}
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# Return a list of expressions about function FUNC's address and length.
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# The first expression is the address of function FUNC, and the second
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# one is FUNC's length. SRC is the source file having function FUNC.
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# An internal label ${func}_label must be defined inside FUNC:
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#
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# int main (void)
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# {
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# asm ("main_label: .globl main_label");
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# return 0;
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# }
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#
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# This label is needed to compute the start address of function FUNC.
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# If the compiler is gcc, we can do the following to get function start
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# and end address too:
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#
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# asm ("func_start: .globl func_start");
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# static void func (void) {}
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# asm ("func_end: .globl func_end");
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#
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# however, this isn't portable, because other compilers, such as clang,
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# may not guarantee the order of global asms and function. The code
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# becomes:
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#
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# asm ("func_start: .globl func_start");
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# asm ("func_end: .globl func_end");
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# static void func (void) {}
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#
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proc function_range { func src {options {debug}} } {
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global decimal gdb_prompt
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shared_gdb_start_use $src $options
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# Compute the label offset, and we can get the function start address
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# by "${func}_label - $func_label_offset".
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set func_label_offset ""
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set test "p ${func}_label - ${func}"
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gdb_test_multiple $test $test {
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-re ".* = ($decimal)\r\n$gdb_prompt $" {
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set func_label_offset $expect_out(1,string)
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}
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}
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# Compute the function length.
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global hex
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set func_length ""
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set test "disassemble $func"
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gdb_test_multiple $test $test {
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-re ".*$hex <\\+($decimal)>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" {
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set func_length $expect_out(1,string)
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}
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}
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# Compute the size of the last instruction.
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# For C++, GDB appends arguments to the names of functions if they don't
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# have a linkage name. For example, asking gdb to disassemble a C++ main
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# will print the function name as main() or main(int argc, char **argv).
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# Take this into account by optionally allowing an argument list after
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# the function name.
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set func_pattern "$func\(\?\:\\(\.\*\\)\)?"
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if { $func_length != 0 } {
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set func_pattern "$func_pattern\\+$func_length"
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}
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set test "with print asm-demangle on -- x/2i $func+$func_length"
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gdb_test_multiple $test $test {
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-re ".*($hex) <$func_pattern>:\[^\r\n\]+\r\n\[ \]+($hex).*\.\r\n$gdb_prompt $" {
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set start $expect_out(1,string)
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set end $expect_out(2,string)
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set func_length [expr $func_length + $end - $start]
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}
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}
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shared_gdb_end_use
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return [list "${func}_label - $func_label_offset" $func_length]
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}
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# Extract the start, length, and end for function called NAME and
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# create suitable variables in the callers scope.
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# Return the list of created variables.
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proc get_func_info { name {options {debug}} } {
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global srcdir subdir srcfile
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upvar 1 "${name}_start" func_start
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upvar 1 "${name}_len" func_len
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upvar 1 "${name}_end" func_end
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lassign [function_range ${name} \
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[list ${srcdir}/${subdir}/$srcfile] \
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${options}] \
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func_start func_len
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set func_end "$func_start + $func_len"
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return [list \
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"${name}_start" \
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"${name}_len" \
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"${name}_end"]
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}
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|
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# A DWARF assembler.
|
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#
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# All the variables in this namespace are private to the
|
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# implementation. Also, any procedure whose name starts with "_" is
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# private as well. Do not use these.
|
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#
|
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# Exported functions are documented at their definition.
|
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#
|
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# In addition to the hand-written functions documented below, this
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# module automatically generates a function for each DWARF tag. For
|
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# most tags, two forms are made: a full name, and one with the
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# "DW_TAG_" prefix stripped. For example, you can use either
|
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# 'DW_TAG_compile_unit' or 'compile_unit' interchangeably.
|
|
#
|
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# There are two exceptions to this rule: DW_TAG_variable and
|
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# DW_TAG_namespace. For these, the full name must always be used,
|
|
# as the short name conflicts with Tcl builtins. (Should future
|
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# versions of Tcl or DWARF add more conflicts, this list will grow.
|
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# If you want to be safe you should always use the full names.)
|
|
#
|
|
# Each tag procedure is defined like:
|
|
#
|
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# proc DW_TAG_mumble {{attrs {}} {children {}}} { ... }
|
|
#
|
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# ATTRS is an optional list of attributes.
|
|
# It is run through 'subst' in the caller's context before processing.
|
|
#
|
|
# Each attribute in the list has one of two forms:
|
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# 1. { NAME VALUE }
|
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# 2. { NAME VALUE FORM }
|
|
#
|
|
# In each case, NAME is the attribute's name.
|
|
# This can either be the full name, like 'DW_AT_name', or a shortened
|
|
# name, like 'name'. These are fully equivalent.
|
|
#
|
|
# Besides DWARF standard attributes, assembler supports 'macro' attribute
|
|
# which will be substituted by one or more standard or macro attributes.
|
|
# supported macro attributes are:
|
|
#
|
|
# - MACRO_AT_range { FUNC }
|
|
# It is substituted by DW_AT_low_pc and DW_AT_high_pc with the start and
|
|
# end address of function FUNC in file $srcdir/$subdir/$srcfile.
|
|
#
|
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# - MACRO_AT_func { FUNC }
|
|
# It is substituted by DW_AT_name with FUNC and MACRO_AT_range.
|
|
#
|
|
# If FORM is given, it should name a DW_FORM_ constant.
|
|
# This can either be the short form, like 'DW_FORM_addr', or a
|
|
# shortened version, like 'addr'. If the form is given, VALUE
|
|
# is its value; see below. In some cases, additional processing
|
|
# is done; for example, DW_FORM_strp manages the .debug_str
|
|
# section automatically.
|
|
#
|
|
# If FORM is 'SPECIAL_expr', then VALUE is treated as a location
|
|
# expression. The effective form is then DW_FORM_block or DW_FORM_exprloc
|
|
# for DWARF version >= 4, and VALUE is passed to the (internal)
|
|
# '_location' proc to be translated.
|
|
# This proc implements a miniature DW_OP_ assembler.
|
|
#
|
|
# If FORM is not given, it is guessed:
|
|
# * If VALUE starts with the "@" character, the rest of VALUE is
|
|
# looked up as a DWARF constant, and DW_FORM_sdata is used. For
|
|
# example, '@DW_LANG_c89' could be used.
|
|
# * If VALUE starts with the ":" character, then it is a label
|
|
# reference. The rest of VALUE is taken to be the name of a label,
|
|
# and DW_FORM_ref4 is used. See 'new_label' and 'define_label'.
|
|
# * If VALUE starts with the "%" character, then it is a label
|
|
# reference too, but DW_FORM_ref_addr is used.
|
|
# * Otherwise, if the attribute name has a default form (f.i. DW_FORM_addr for
|
|
# DW_AT_low_pc), then that one is used.
|
|
# * Otherwise, an error is reported. Either specify a form explicitly, or
|
|
# add a default for the the attribute name in _default_form.
|
|
#
|
|
# CHILDREN is just Tcl code that can be used to define child DIEs. It
|
|
# is evaluated in the caller's context.
|
|
#
|
|
# Currently this code is missing nice support for CFA handling, and
|
|
# probably other things as well.
|
|
|
|
namespace eval Dwarf {
|
|
# True if the module has been initialized.
|
|
variable _initialized 0
|
|
|
|
# Constants from dwarf2.h.
|
|
variable _constants
|
|
# DW_AT short names.
|
|
variable _AT
|
|
# DW_FORM short names.
|
|
variable _FORM
|
|
# DW_OP short names.
|
|
variable _OP
|
|
|
|
# The current output file.
|
|
variable _output_file
|
|
|
|
# Note: The _cu_ values here also apply to type units (TUs).
|
|
# Think of a TU as a special kind of CU.
|
|
|
|
# Current CU count.
|
|
variable _cu_count
|
|
|
|
# The current CU's base label.
|
|
variable _cu_label
|
|
|
|
# The current CU's version.
|
|
variable _cu_version
|
|
|
|
# The current CU's address size.
|
|
variable _cu_addr_size
|
|
# The current CU's offset size.
|
|
variable _cu_offset_size
|
|
|
|
# Label generation number.
|
|
variable _label_num
|
|
|
|
# The deferred output array. The index is the section name; the
|
|
# contents hold the data for that section.
|
|
variable _deferred_output
|
|
|
|
# If empty, we should write directly to the output file.
|
|
# Otherwise, this is the name of a section to write to.
|
|
variable _defer
|
|
|
|
# The abbrev section. Typically .debug_abbrev but can be .debug_abbrev.dwo
|
|
# for Fission.
|
|
variable _abbrev_section
|
|
|
|
# The next available abbrev number in the current CU's abbrev
|
|
# table.
|
|
variable _abbrev_num
|
|
|
|
# The string table for this assembly. The key is the string; the
|
|
# value is the label for that string.
|
|
variable _strings
|
|
|
|
# Current .debug_line unit count.
|
|
variable _line_count
|
|
|
|
# A Label for line table header generation.
|
|
variable _line_header_end_label
|
|
|
|
# The address size for debug ranges section.
|
|
variable _debug_ranges_64_bit
|
|
|
|
# The index into the .debug_addr section (used for fission
|
|
# generation).
|
|
variable _debug_addr_index
|
|
|
|
# Flag, true if the current CU is contains fission information,
|
|
# otherwise false.
|
|
variable _cu_is_fission
|
|
|
|
proc _process_one_constant {name value} {
|
|
variable _constants
|
|
variable _AT
|
|
variable _FORM
|
|
variable _OP
|
|
|
|
set _constants($name) $value
|
|
|
|
if {![regexp "^DW_(\[A-Z\]+)_(\[A-Za-z0-9_\]+)$" $name \
|
|
ignore prefix name2]} {
|
|
error "non-matching name: $name"
|
|
}
|
|
|
|
if {$name2 == "lo_user" || $name2 == "hi_user"} {
|
|
return
|
|
}
|
|
|
|
# We only try to shorten some very common things.
|
|
# FIXME: CFA?
|
|
switch -exact -- $prefix {
|
|
TAG {
|
|
# Create two procedures for the tag. These call
|
|
# _handle_DW_TAG with the full tag name baked in; this
|
|
# does all the actual work.
|
|
proc $name {{attrs {}} {children {}}} \
|
|
"_handle_DW_TAG $name \$attrs \$children"
|
|
|
|
# Filter out ones that are known to clash.
|
|
if {$name2 == "variable" || $name2 == "namespace"} {
|
|
set name2 "tag_$name2"
|
|
}
|
|
|
|
if {[info commands $name2] != {}} {
|
|
error "duplicate proc name: from $name"
|
|
}
|
|
|
|
proc $name2 {{attrs {}} {children {}}} \
|
|
"_handle_DW_TAG $name \$attrs \$children"
|
|
}
|
|
|
|
AT {
|
|
set _AT($name2) $name
|
|
}
|
|
|
|
FORM {
|
|
set _FORM($name2) $name
|
|
}
|
|
|
|
OP {
|
|
set _OP($name2) $name
|
|
}
|
|
|
|
default {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
proc _read_constants {} {
|
|
global srcdir hex decimal
|
|
|
|
# DWARF name-matching regexp.
|
|
set dwrx "DW_\[a-zA-Z0-9_\]+"
|
|
# Whitespace regexp.
|
|
set ws "\[ \t\]+"
|
|
|
|
set fd [open [file join $srcdir .. .. include dwarf2.h]]
|
|
while {![eof $fd]} {
|
|
set line [gets $fd]
|
|
if {[regexp -- "^${ws}($dwrx)${ws}=${ws}($hex|$decimal),?$" \
|
|
$line ignore name value ignore2]} {
|
|
_process_one_constant $name $value
|
|
}
|
|
}
|
|
close $fd
|
|
|
|
set fd [open [file join $srcdir .. .. include dwarf2.def]]
|
|
while {![eof $fd]} {
|
|
set line [gets $fd]
|
|
if {[regexp -- \
|
|
"^DW_\[A-Z_\]+${ws}\\(($dwrx),${ws}($hex|$decimal)\\)$" \
|
|
$line ignore name value ignore2]} {
|
|
_process_one_constant $name $value
|
|
}
|
|
}
|
|
close $fd
|
|
}
|
|
|
|
proc _quote {string} {
|
|
# FIXME
|
|
return "\"${string}\\0\""
|
|
}
|
|
|
|
proc _nz_quote {string} {
|
|
# For now, no quoting is done.
|
|
return "\"${string}\""
|
|
}
|
|
|
|
proc _handle_DW_FORM {form value} {
|
|
switch -exact -- $form {
|
|
DW_FORM_string {
|
|
_op .ascii [_quote $value]
|
|
}
|
|
|
|
DW_FORM_implicit_const -
|
|
DW_FORM_flag_present {
|
|
# We don't need to emit anything.
|
|
}
|
|
|
|
DW_FORM_data4 -
|
|
DW_FORM_ref4 {
|
|
_op .4byte $value
|
|
}
|
|
|
|
DW_FORM_ref_addr {
|
|
variable _cu_offset_size
|
|
variable _cu_version
|
|
variable _cu_addr_size
|
|
|
|
if {$_cu_version == 2} {
|
|
set size $_cu_addr_size
|
|
} else {
|
|
set size $_cu_offset_size
|
|
}
|
|
|
|
_op .${size}byte $value
|
|
}
|
|
|
|
DW_FORM_GNU_ref_alt -
|
|
DW_FORM_GNU_strp_alt -
|
|
DW_FORM_sec_offset {
|
|
variable _cu_offset_size
|
|
_op_offset $_cu_offset_size $value
|
|
}
|
|
|
|
DW_FORM_ref1 -
|
|
DW_FORM_flag -
|
|
DW_FORM_data1 {
|
|
_op .byte $value
|
|
}
|
|
|
|
DW_FORM_sdata {
|
|
_op .sleb128 $value
|
|
}
|
|
|
|
DW_FORM_ref_udata -
|
|
DW_FORM_udata -
|
|
DW_FORM_loclistx -
|
|
DW_FORM_rnglistx {
|
|
_op .uleb128 $value
|
|
}
|
|
|
|
DW_FORM_addr {
|
|
variable _cu_addr_size
|
|
|
|
_op .${_cu_addr_size}byte $value
|
|
}
|
|
|
|
DW_FORM_GNU_addr_index {
|
|
variable _debug_addr_index
|
|
variable _cu_addr_size
|
|
|
|
_op .uleb128 ${_debug_addr_index}
|
|
incr _debug_addr_index
|
|
|
|
_defer_output .debug_addr {
|
|
_op .${_cu_addr_size}byte $value
|
|
}
|
|
}
|
|
|
|
DW_FORM_data2 -
|
|
DW_FORM_ref2 {
|
|
_op .2byte $value
|
|
}
|
|
|
|
DW_FORM_data8 -
|
|
DW_FORM_ref8 -
|
|
DW_FORM_ref_sig8 {
|
|
_op .8byte $value
|
|
}
|
|
|
|
DW_FORM_data16 {
|
|
_op .8byte $value
|
|
}
|
|
|
|
DW_FORM_strp {
|
|
variable _strings
|
|
variable _cu_offset_size
|
|
|
|
if {![info exists _strings($value)]} {
|
|
set _strings($value) [new_label strp]
|
|
_defer_output .debug_str {
|
|
define_label $_strings($value)
|
|
_op .ascii [_quote $value]
|
|
}
|
|
}
|
|
|
|
_op_offset $_cu_offset_size $_strings($value) "strp: $value"
|
|
}
|
|
|
|
SPECIAL_expr {
|
|
variable _cu_version
|
|
variable _cu_addr_size
|
|
variable _cu_offset_size
|
|
|
|
set l1 [new_label "expr_start"]
|
|
set l2 [new_label "expr_end"]
|
|
_op .uleb128 "$l2 - $l1" "expression"
|
|
define_label $l1
|
|
_location $value $_cu_version $_cu_addr_size $_cu_offset_size
|
|
define_label $l2
|
|
}
|
|
|
|
DW_FORM_block1 {
|
|
set len [string length $value]
|
|
if {$len > 255} {
|
|
error "DW_FORM_block1 length too long"
|
|
}
|
|
_op .byte $len
|
|
_op .ascii [_nz_quote $value]
|
|
}
|
|
|
|
DW_FORM_block2 -
|
|
DW_FORM_block4 -
|
|
|
|
DW_FORM_block -
|
|
|
|
DW_FORM_ref2 -
|
|
DW_FORM_indirect -
|
|
DW_FORM_exprloc -
|
|
|
|
DW_FORM_strx -
|
|
DW_FORM_strx1 -
|
|
DW_FORM_strx2 -
|
|
DW_FORM_strx3 -
|
|
DW_FORM_strx4 -
|
|
|
|
DW_FORM_GNU_str_index -
|
|
|
|
default {
|
|
error "unhandled form $form"
|
|
}
|
|
}
|
|
}
|
|
|
|
proc _guess_form {value varname} {
|
|
upvar $varname new_value
|
|
|
|
switch -exact -- [string range $value 0 0] {
|
|
@ {
|
|
# Constant reference.
|
|
variable _constants
|
|
|
|
set new_value $_constants([string range $value 1 end])
|
|
# Just the simplest.
|
|
return DW_FORM_sdata
|
|
}
|
|
|
|
: {
|
|
# Label reference.
|
|
variable _cu_label
|
|
|
|
set new_value "[string range $value 1 end] - $_cu_label"
|
|
|
|
return DW_FORM_ref4
|
|
}
|
|
|
|
% {
|
|
# Label reference, an offset from .debug_info.
|
|
set new_value "[string range $value 1 end]"
|
|
|
|
return DW_FORM_ref_addr
|
|
}
|
|
|
|
default {
|
|
return ""
|
|
}
|
|
}
|
|
}
|
|
|
|
proc _default_form { attr } {
|
|
switch -exact -- $attr {
|
|
DW_AT_low_pc {
|
|
return DW_FORM_addr
|
|
}
|
|
DW_AT_producer -
|
|
DW_AT_comp_dir -
|
|
DW_AT_linkage_name -
|
|
DW_AT_MIPS_linkage_name -
|
|
DW_AT_name {
|
|
return DW_FORM_string
|
|
}
|
|
DW_AT_GNU_addr_base {
|
|
return DW_FORM_sec_offset
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
# Map NAME to its canonical form.
|
|
proc _map_name {name ary} {
|
|
variable $ary
|
|
|
|
if {[info exists ${ary}($name)]} {
|
|
set name [set ${ary}($name)]
|
|
}
|
|
|
|
return $name
|
|
}
|
|
|
|
proc _handle_attribute { attr_name attr_value attr_form } {
|
|
variable _abbrev_section
|
|
variable _constants
|
|
variable _cu_version
|
|
|
|
_handle_DW_FORM $attr_form $attr_value
|
|
|
|
_defer_output $_abbrev_section {
|
|
if { $attr_form eq "SPECIAL_expr" } {
|
|
if { $_cu_version < 4 } {
|
|
set attr_form_comment "DW_FORM_block"
|
|
} else {
|
|
set attr_form_comment "DW_FORM_exprloc"
|
|
}
|
|
} else {
|
|
set attr_form_comment $attr_form
|
|
}
|
|
_op .uleb128 $_constants($attr_name) $attr_name
|
|
_op .uleb128 $_constants($attr_form) $attr_form_comment
|
|
if {$attr_form eq "DW_FORM_implicit_const"} {
|
|
_op .sleb128 $attr_value "the constant"
|
|
}
|
|
}
|
|
}
|
|
|
|
# Handle macro attribute MACRO_AT_range.
|
|
|
|
proc _handle_macro_at_range { attr_value } {
|
|
variable _cu_is_fission
|
|
|
|
if {[llength $attr_value] != 1} {
|
|
error "usage: MACRO_AT_range { func }"
|
|
}
|
|
|
|
set func [lindex $attr_value 0]
|
|
global srcdir subdir srcfile
|
|
set src ${srcdir}/${subdir}/${srcfile}
|
|
set result [function_range $func $src]
|
|
|
|
set form DW_FORM_addr
|
|
if { $_cu_is_fission } {
|
|
set form DW_FORM_GNU_addr_index
|
|
}
|
|
|
|
_handle_attribute DW_AT_low_pc [lindex $result 0] $form
|
|
_handle_attribute DW_AT_high_pc \
|
|
"[lindex $result 0] + [lindex $result 1]" $form
|
|
}
|
|
|
|
# Handle macro attribute MACRO_AT_func.
|
|
|
|
proc _handle_macro_at_func { attr_value } {
|
|
if {[llength $attr_value] != 1} {
|
|
error "usage: MACRO_AT_func { func file }"
|
|
}
|
|
_handle_attribute DW_AT_name [lindex $attr_value 0] DW_FORM_string
|
|
_handle_macro_at_range $attr_value
|
|
}
|
|
|
|
# Return the next available abbrev number in the current CU's abbrev
|
|
# table.
|
|
proc _get_abbrev_num {} {
|
|
variable _abbrev_num
|
|
set res $_abbrev_num
|
|
incr _abbrev_num
|
|
return $res
|
|
}
|
|
|
|
proc _handle_DW_TAG {tag_name {attrs {}} {children {}}} {
|
|
variable _abbrev_section
|
|
variable _abbrev_num
|
|
variable _constants
|
|
|
|
set has_children [expr {[string length $children] > 0}]
|
|
set my_abbrev [_get_abbrev_num]
|
|
|
|
# We somewhat wastefully emit a new abbrev entry for each tag.
|
|
# There's no reason for this other than laziness.
|
|
_defer_output $_abbrev_section {
|
|
_op .uleb128 $my_abbrev "Abbrev start"
|
|
_op .uleb128 $_constants($tag_name) $tag_name
|
|
_op .byte $has_children "has_children"
|
|
}
|
|
|
|
_op .uleb128 $my_abbrev "Abbrev ($tag_name)"
|
|
|
|
foreach attr $attrs {
|
|
set attr_name [_map_name [lindex $attr 0] _AT]
|
|
|
|
# When the length of ATTR is greater than 2, the last
|
|
# element of the list must be a form. The second through
|
|
# the penultimate elements are joined together and
|
|
# evaluated using subst. This allows constructs such as
|
|
# [gdb_target_symbol foo] to be used.
|
|
|
|
if {[llength $attr] > 2} {
|
|
set attr_value [uplevel 2 [list subst [join [lrange $attr 1 end-1]]]]
|
|
} else {
|
|
set attr_value [uplevel 2 [list subst [lindex $attr 1]]]
|
|
}
|
|
|
|
if { [string equal "MACRO_AT_func" $attr_name] } {
|
|
_handle_macro_at_func $attr_value
|
|
} elseif { [string equal "MACRO_AT_range" $attr_name] } {
|
|
_handle_macro_at_range $attr_value
|
|
} else {
|
|
if {[llength $attr] > 2} {
|
|
set attr_form [uplevel 2 [list subst [lindex $attr end]]]
|
|
|
|
if { [string index $attr_value 0] == ":" } {
|
|
# It is a label, get its value.
|
|
_guess_form $attr_value attr_value
|
|
}
|
|
} else {
|
|
set attr_form [_guess_form $attr_value attr_value]
|
|
if { $attr_form eq "" } {
|
|
set attr_form [_default_form $attr_name]
|
|
}
|
|
if { $attr_form eq "" } {
|
|
error "No form for $attr_name $attr_value"
|
|
}
|
|
}
|
|
set attr_form [_map_name $attr_form _FORM]
|
|
|
|
_handle_attribute $attr_name $attr_value $attr_form
|
|
}
|
|
}
|
|
|
|
_defer_output $_abbrev_section {
|
|
# Terminator.
|
|
_op .byte 0x0 "DW_AT - Terminator"
|
|
_op .byte 0x0 "DW_FORM - Terminator"
|
|
}
|
|
|
|
if {$has_children} {
|
|
uplevel 2 $children
|
|
|
|
# Terminate children.
|
|
_op .byte 0x0 "Terminate children"
|
|
}
|
|
}
|
|
|
|
proc _emit {string} {
|
|
variable _output_file
|
|
variable _defer
|
|
variable _deferred_output
|
|
|
|
if {$_defer == ""} {
|
|
puts $_output_file $string
|
|
} else {
|
|
append _deferred_output($_defer) ${string}\n
|
|
}
|
|
}
|
|
|
|
proc _section {name {flags ""} {type ""}} {
|
|
if {$flags == "" && $type == ""} {
|
|
_emit " .section $name"
|
|
} elseif {$type == ""} {
|
|
_emit " .section $name, \"$flags\""
|
|
} else {
|
|
_emit " .section $name, \"$flags\", %$type"
|
|
}
|
|
}
|
|
|
|
# SECTION_SPEC is a list of arguments to _section.
|
|
proc _defer_output {section_spec body} {
|
|
variable _defer
|
|
variable _deferred_output
|
|
|
|
set old_defer $_defer
|
|
set _defer [lindex $section_spec 0]
|
|
|
|
if {![info exists _deferred_output($_defer)]} {
|
|
set _deferred_output($_defer) ""
|
|
eval _section $section_spec
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
set _defer $old_defer
|
|
}
|
|
|
|
proc _defer_to_string {body} {
|
|
variable _defer
|
|
variable _deferred_output
|
|
|
|
set old_defer $_defer
|
|
set _defer temp
|
|
|
|
set _deferred_output($_defer) ""
|
|
|
|
uplevel $body
|
|
|
|
set result $_deferred_output($_defer)
|
|
unset _deferred_output($_defer)
|
|
|
|
set _defer $old_defer
|
|
return $result
|
|
}
|
|
|
|
proc _write_deferred_output {} {
|
|
variable _output_file
|
|
variable _deferred_output
|
|
|
|
foreach section [array names _deferred_output] {
|
|
# The data already has a newline.
|
|
puts -nonewline $_output_file $_deferred_output($section)
|
|
}
|
|
|
|
# Save some memory.
|
|
unset _deferred_output
|
|
}
|
|
|
|
proc _op {name value {comment ""}} {
|
|
set text " ${name} ${value}"
|
|
if {$comment != ""} {
|
|
# Try to make stuff line up nicely.
|
|
while {[string length $text] < 40} {
|
|
append text " "
|
|
}
|
|
append text "/* ${comment} */"
|
|
}
|
|
_emit $text
|
|
}
|
|
|
|
proc _op_offset { size offset {comment ""} } {
|
|
if { $size == 4 } {
|
|
_op .4byte $offset $comment
|
|
} elseif { $size == 8 } {
|
|
if {[is_64_target]} {
|
|
_op .8byte $offset $comment
|
|
} else {
|
|
# This allows us to emit 64-bit dwarf for
|
|
# 32-bit targets.
|
|
if { [target_endianness] == "little" } {
|
|
_op .4byte $offset "$comment (lsw)"
|
|
_op .4byte 0 "$comment (msw)"
|
|
} else {
|
|
_op .4byte 0 "$comment (msw)"
|
|
_op .4byte $offset "$comment (lsw)"
|
|
}
|
|
}
|
|
} else {
|
|
error "Don't know how to handle offset size $size"
|
|
}
|
|
}
|
|
|
|
proc _compute_label {name} {
|
|
return ".L${name}"
|
|
}
|
|
|
|
# Return a name suitable for use as a label. If BASE_NAME is
|
|
# specified, it is incorporated into the label name; this is to
|
|
# make debugging the generated assembler easier. If BASE_NAME is
|
|
# not specified a generic default is used. This proc does not
|
|
# define the label; see 'define_label'. 'new_label' attempts to
|
|
# ensure that label names are unique.
|
|
proc new_label {{base_name label}} {
|
|
variable _label_num
|
|
|
|
return [_compute_label ${base_name}[incr _label_num]]
|
|
}
|
|
|
|
# Define a label named NAME. Ordinarily, NAME comes from a call
|
|
# to 'new_label', but this is not required.
|
|
proc define_label {name} {
|
|
_emit "${name}:"
|
|
}
|
|
|
|
# A higher-level interface to label handling.
|
|
#
|
|
# ARGS is a list of label descriptors. Each one is either a
|
|
# single element, or a list of two elements -- a name and some
|
|
# text. For each descriptor, 'new_label' is invoked. If the list
|
|
# form is used, the second element in the list is passed as an
|
|
# argument. The label name is used to define a variable in the
|
|
# enclosing scope; this can be used to refer to the label later.
|
|
# The label name is also used to define a new proc whose name is
|
|
# the label name plus a trailing ":". This proc takes a body as
|
|
# an argument and can be used to define the label at that point;
|
|
# then the body, if any, is evaluated in the caller's context.
|
|
#
|
|
# For example:
|
|
#
|
|
# declare_labels int_label
|
|
# something { ... $int_label } ;# refer to the label
|
|
# int_label: constant { ... } ;# define the label
|
|
proc declare_labels {args} {
|
|
foreach arg $args {
|
|
set name [lindex $arg 0]
|
|
set text [lindex $arg 1]
|
|
|
|
if { $text == "" } {
|
|
set text $name
|
|
}
|
|
|
|
upvar $name label_var
|
|
set label_var [new_label $text]
|
|
|
|
proc ${name}: {args} [format {
|
|
define_label %s
|
|
uplevel $args
|
|
} $label_var]
|
|
}
|
|
}
|
|
|
|
# Assign elements from LINE to the elements of an array named
|
|
# "argvec" in the caller scope. The keys used are named in ARGS.
|
|
# If the wrong number of elements appear in LINE, error.
|
|
proc _get_args {line op args} {
|
|
if {[llength $line] != [llength $args] + 1} {
|
|
error "usage: $op [string toupper $args]"
|
|
}
|
|
|
|
upvar argvec argvec
|
|
foreach var $args value [lreplace $line 0 0] {
|
|
set argvec($var) $value
|
|
}
|
|
}
|
|
|
|
# This is a miniature assembler for location expressions. It is
|
|
# suitable for use in the attributes to a DIE. Its output is
|
|
# prefixed with "=" to make it automatically use DW_FORM_block.
|
|
#
|
|
# BODY is split by lines, and each line is taken to be a list.
|
|
#
|
|
# DWARF_VERSION is the DWARF version for the section where the location
|
|
# description is found.
|
|
#
|
|
# ADDR_SIZE is the length in bytes (4 or 8) of an address on the target
|
|
# machine (typically found in the header of the section where the location
|
|
# description is found).
|
|
#
|
|
# OFFSET_SIZE is the length in bytes (4 or 8) of an offset into a DWARF
|
|
# section. This typically depends on whether 32-bit or 64-bit DWARF is
|
|
# used, as indicated in the header of the section where the location
|
|
# description is found.
|
|
#
|
|
# (FIXME should use 'info complete' here.)
|
|
# Each list's first element is the opcode, either short or long
|
|
# forms are accepted.
|
|
# FIXME argument handling
|
|
# FIXME move docs
|
|
proc _location { body dwarf_version addr_size offset_size } {
|
|
variable _constants
|
|
|
|
foreach line [split $body \n] {
|
|
# Ignore blank lines, and allow embedded comments.
|
|
if {[lindex $line 0] == "" || [regexp -- {^[ \t]*#} $line]} {
|
|
continue
|
|
}
|
|
set opcode [_map_name [lindex $line 0] _OP]
|
|
_op .byte $_constants($opcode) $opcode
|
|
|
|
array unset argvec *
|
|
switch -exact -- $opcode {
|
|
DW_OP_addr {
|
|
_get_args $line $opcode size
|
|
_op .${addr_size}byte $argvec(size)
|
|
}
|
|
|
|
DW_OP_GNU_addr_index {
|
|
variable _debug_addr_index
|
|
variable _cu_addr_size
|
|
|
|
_op .uleb128 ${_debug_addr_index}
|
|
incr _debug_addr_index
|
|
|
|
_defer_output .debug_addr {
|
|
_op .${_cu_addr_size}byte [lindex $line 1]
|
|
}
|
|
}
|
|
|
|
DW_OP_regx {
|
|
_get_args $line $opcode register
|
|
_op .uleb128 $argvec(register)
|
|
}
|
|
|
|
DW_OP_pick -
|
|
DW_OP_const1u -
|
|
DW_OP_const1s {
|
|
_get_args $line $opcode const
|
|
_op .byte $argvec(const)
|
|
}
|
|
|
|
DW_OP_const2u -
|
|
DW_OP_const2s {
|
|
_get_args $line $opcode const
|
|
_op .2byte $argvec(const)
|
|
}
|
|
|
|
DW_OP_const4u -
|
|
DW_OP_const4s {
|
|
_get_args $line $opcode const
|
|
_op .4byte $argvec(const)
|
|
}
|
|
|
|
DW_OP_const8u -
|
|
DW_OP_const8s {
|
|
_get_args $line $opcode const
|
|
_op .8byte $argvec(const)
|
|
}
|
|
|
|
DW_OP_constu {
|
|
_get_args $line $opcode const
|
|
_op .uleb128 $argvec(const)
|
|
}
|
|
DW_OP_consts {
|
|
_get_args $line $opcode const
|
|
_op .sleb128 $argvec(const)
|
|
}
|
|
|
|
DW_OP_plus_uconst {
|
|
_get_args $line $opcode const
|
|
_op .uleb128 $argvec(const)
|
|
}
|
|
|
|
DW_OP_piece {
|
|
_get_args $line $opcode size
|
|
_op .uleb128 $argvec(size)
|
|
}
|
|
|
|
DW_OP_bit_piece {
|
|
_get_args $line $opcode size offset
|
|
_op .uleb128 $argvec(size)
|
|
_op .uleb128 $argvec(offset)
|
|
}
|
|
|
|
DW_OP_skip -
|
|
DW_OP_bra {
|
|
_get_args $line $opcode label
|
|
_op .2byte $argvec(label)
|
|
}
|
|
|
|
DW_OP_implicit_value {
|
|
set l1 [new_label "value_start"]
|
|
set l2 [new_label "value_end"]
|
|
_op .uleb128 "$l2 - $l1"
|
|
define_label $l1
|
|
foreach value [lrange $line 1 end] {
|
|
switch -regexp -- $value {
|
|
{^0x[[:xdigit:]]{1,2}$} {_op .byte $value}
|
|
{^0x[[:xdigit:]]{4}$} {_op .2byte $value}
|
|
{^0x[[:xdigit:]]{8}$} {_op .4byte $value}
|
|
{^0x[[:xdigit:]]{16}$} {_op .8byte $value}
|
|
default {
|
|
error "bad value '$value' in DW_OP_implicit_value"
|
|
}
|
|
}
|
|
}
|
|
define_label $l2
|
|
}
|
|
|
|
DW_OP_implicit_pointer -
|
|
DW_OP_GNU_implicit_pointer {
|
|
_get_args $line $opcode label offset
|
|
|
|
# Here label is a section offset.
|
|
if { $dwarf_version == 2 } {
|
|
_op .${addr_size}byte $argvec(label)
|
|
} else {
|
|
_op_offset $offset_size $argvec(label)
|
|
}
|
|
_op .sleb128 $argvec(offset)
|
|
}
|
|
|
|
DW_OP_GNU_variable_value {
|
|
_get_args $line $opcode label
|
|
|
|
# Here label is a section offset.
|
|
if { $dwarf_version == 2 } {
|
|
_op .${addr_size}byte $argvec(label)
|
|
} else {
|
|
_op_offset $offset_size $argvec(label)
|
|
}
|
|
}
|
|
|
|
DW_OP_deref_size {
|
|
_get_args $line $opcode size
|
|
_op .byte $argvec(size)
|
|
}
|
|
|
|
DW_OP_bregx {
|
|
_get_args $line $opcode register offset
|
|
_op .uleb128 $argvec(register)
|
|
_op .sleb128 $argvec(offset)
|
|
}
|
|
|
|
DW_OP_fbreg {
|
|
_get_args $line $opcode offset
|
|
_op .sleb128 $argvec(offset)
|
|
}
|
|
|
|
DW_OP_fbreg {
|
|
_op .sleb128 [lindex $line 1]
|
|
}
|
|
|
|
default {
|
|
if {[llength $line] > 1} {
|
|
error "Unimplemented: operands in location for $opcode"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Return a label that references the current position in the
|
|
# .debug_addr table. When a user is creating split DWARF they
|
|
# will define two CUs, the first will be the split DWARF content,
|
|
# and the second will be the non-split stub CU. The split DWARF
|
|
# CU fills in the .debug_addr section, but the non-split CU
|
|
# includes a reference to the start of the section. The label
|
|
# returned by this proc provides that reference.
|
|
proc debug_addr_label {} {
|
|
variable _debug_addr_index
|
|
|
|
set lbl [new_label "debug_addr_idx_${_debug_addr_index}_"]
|
|
_defer_output .debug_addr {
|
|
define_label $lbl
|
|
}
|
|
return $lbl
|
|
}
|
|
|
|
# Emit a DWARF CU.
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if you want to emit 64-bit DWARF
|
|
# default = 0 (32-bit)
|
|
# version n - DWARF version number to emit
|
|
# default = 4
|
|
# addr_size n - the size of addresses in bytes: 4, 8, or default
|
|
# default = default
|
|
# fission 0|1 - boolean indicating if generating Fission debug info
|
|
# default = 0
|
|
# label <label>
|
|
# - string indicating label to be defined at the start
|
|
# of the CU header.
|
|
# default = ""
|
|
# BODY is Tcl code that emits the DIEs which make up the body of
|
|
# the CU. It is evaluated in the caller's context.
|
|
proc cu {options body} {
|
|
variable _constants
|
|
variable _cu_count
|
|
variable _abbrev_section
|
|
variable _abbrev_num
|
|
variable _cu_label
|
|
variable _cu_version
|
|
variable _cu_addr_size
|
|
variable _cu_offset_size
|
|
variable _cu_is_fission
|
|
|
|
# Establish the defaults.
|
|
set is_64 0
|
|
set _cu_version 4
|
|
set _cu_addr_size default
|
|
set _cu_is_fission 0
|
|
set section ".debug_info"
|
|
set _abbrev_section ".debug_abbrev"
|
|
set label ""
|
|
|
|
foreach { name value } $options {
|
|
set value [uplevel 1 "subst \"$value\""]
|
|
switch -exact -- $name {
|
|
is_64 { set is_64 $value }
|
|
version { set _cu_version $value }
|
|
addr_size { set _cu_addr_size $value }
|
|
fission { set _cu_is_fission $value }
|
|
label { set label $value }
|
|
default { error "unknown option $name" }
|
|
}
|
|
}
|
|
if {$_cu_addr_size == "default"} {
|
|
if {[is_64_target]} {
|
|
set _cu_addr_size 8
|
|
} else {
|
|
set _cu_addr_size 4
|
|
}
|
|
}
|
|
set _cu_offset_size [expr { $is_64 ? 8 : 4 }]
|
|
if { $_cu_is_fission } {
|
|
set section ".debug_info.dwo"
|
|
set _abbrev_section ".debug_abbrev.dwo"
|
|
}
|
|
|
|
if {$_cu_version < 4} {
|
|
set _constants(SPECIAL_expr) $_constants(DW_FORM_block)
|
|
} else {
|
|
set _constants(SPECIAL_expr) $_constants(DW_FORM_exprloc)
|
|
}
|
|
|
|
_section $section
|
|
|
|
set cu_num [incr _cu_count]
|
|
set my_abbrevs [_compute_label "abbrev${cu_num}_begin"]
|
|
set _abbrev_num 1
|
|
|
|
set _cu_label [_compute_label "cu${cu_num}_begin"]
|
|
set start_label [_compute_label "cu${cu_num}_start"]
|
|
set end_label [_compute_label "cu${cu_num}_end"]
|
|
|
|
if { $label != "" } {
|
|
upvar $label my_label
|
|
set my_label $_cu_label
|
|
}
|
|
|
|
define_label $_cu_label
|
|
if {$is_64} {
|
|
_op .4byte 0xffffffff
|
|
_op .8byte "$end_label - $start_label"
|
|
} else {
|
|
_op .4byte "$end_label - $start_label"
|
|
}
|
|
define_label $start_label
|
|
_op .2byte $_cu_version Version
|
|
|
|
# The CU header for DWARF 4 and 5 are slightly different.
|
|
if { $_cu_version == 5 } {
|
|
_op .byte 0x1 "DW_UT_compile"
|
|
_op .byte $_cu_addr_size "Pointer size"
|
|
_op_offset $_cu_offset_size $my_abbrevs Abbrevs
|
|
} else {
|
|
_op_offset $_cu_offset_size $my_abbrevs Abbrevs
|
|
_op .byte $_cu_addr_size "Pointer size"
|
|
}
|
|
|
|
_defer_output $_abbrev_section {
|
|
define_label $my_abbrevs
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
_defer_output $_abbrev_section {
|
|
# Emit the terminator.
|
|
_op .byte 0x0 "Abbrev end - Terminator"
|
|
}
|
|
|
|
define_label $end_label
|
|
}
|
|
|
|
# Emit a DWARF TU.
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if you want to emit 64-bit DWARF
|
|
# default = 0 (32-bit)
|
|
# version n - DWARF version number to emit
|
|
# default = 4
|
|
# addr_size n - the size of addresses in bytes: 4, 8, or default
|
|
# default = default
|
|
# fission 0|1 - boolean indicating if generating Fission debug info
|
|
# default = 0
|
|
# SIGNATURE is the 64-bit signature of the type.
|
|
# TYPE_LABEL is the label of the type defined by this TU,
|
|
# or "" if there is no type (i.e., type stubs in Fission).
|
|
# BODY is Tcl code that emits the DIEs which make up the body of
|
|
# the TU. It is evaluated in the caller's context.
|
|
proc tu {options signature type_label body} {
|
|
variable _cu_count
|
|
variable _abbrev_section
|
|
variable _abbrev_num
|
|
variable _cu_label
|
|
variable _cu_version
|
|
variable _cu_addr_size
|
|
variable _cu_offset_size
|
|
variable _cu_is_fission
|
|
|
|
# Establish the defaults.
|
|
set is_64 0
|
|
set _cu_version 4
|
|
set _cu_addr_size default
|
|
set _cu_is_fission 0
|
|
set section ".debug_types"
|
|
set _abbrev_section ".debug_abbrev"
|
|
set label ""
|
|
|
|
foreach { name value } $options {
|
|
set value [uplevel 1 "subst \"$value\""]
|
|
switch -exact -- $name {
|
|
is_64 { set is_64 $value }
|
|
version { set _cu_version $value }
|
|
addr_size { set _cu_addr_size $value }
|
|
fission { set _cu_is_fission $value }
|
|
label { set label $value }
|
|
default { error "unknown option $name" }
|
|
}
|
|
}
|
|
if {$_cu_addr_size == "default"} {
|
|
if {[is_64_target]} {
|
|
set _cu_addr_size 8
|
|
} else {
|
|
set _cu_addr_size 4
|
|
}
|
|
}
|
|
set _cu_offset_size [expr { $is_64 ? 8 : 4 }]
|
|
if { $_cu_version == 5 } {
|
|
set section ".debug_info"
|
|
}
|
|
if { $_cu_is_fission } {
|
|
set section "$section.dwo"
|
|
set _abbrev_section "$section.dwo"
|
|
}
|
|
|
|
_section $section
|
|
|
|
set cu_num [incr _cu_count]
|
|
set my_abbrevs [_compute_label "abbrev${cu_num}_begin"]
|
|
set _abbrev_num 1
|
|
|
|
set _cu_label [_compute_label "cu${cu_num}_begin"]
|
|
set start_label [_compute_label "cu${cu_num}_start"]
|
|
set end_label [_compute_label "cu${cu_num}_end"]
|
|
|
|
if { $label != "" } {
|
|
upvar $label my_label
|
|
set my_label $_cu_label
|
|
}
|
|
|
|
define_label $_cu_label
|
|
if {$is_64} {
|
|
_op .4byte 0xffffffff
|
|
_op .8byte "$end_label - $start_label"
|
|
} else {
|
|
_op .4byte "$end_label - $start_label"
|
|
}
|
|
define_label $start_label
|
|
_op .2byte $_cu_version Version
|
|
|
|
# The CU header for DWARF 4 and 5 are slightly different.
|
|
if { $_cu_version == 5 } {
|
|
_op .byte 0x2 "DW_UT_type"
|
|
_op .byte $_cu_addr_size "Pointer size"
|
|
_op_offset $_cu_offset_size $my_abbrevs Abbrevs
|
|
} else {
|
|
_op_offset $_cu_offset_size $my_abbrevs Abbrevs
|
|
_op .byte $_cu_addr_size "Pointer size"
|
|
}
|
|
|
|
_op .8byte $signature Signature
|
|
if { $type_label != "" } {
|
|
uplevel declare_labels $type_label
|
|
upvar $type_label my_type_label
|
|
if {$is_64} {
|
|
_op .8byte "$my_type_label - $_cu_label"
|
|
} else {
|
|
_op .4byte "$my_type_label - $_cu_label"
|
|
}
|
|
} else {
|
|
if {$is_64} {
|
|
_op .8byte 0
|
|
} else {
|
|
_op .4byte 0
|
|
}
|
|
}
|
|
|
|
_defer_output $_abbrev_section {
|
|
define_label $my_abbrevs
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
_defer_output $_abbrev_section {
|
|
# Emit the terminator.
|
|
_op .byte 0x0 "Abbrev end - Terminator"
|
|
}
|
|
|
|
define_label $end_label
|
|
}
|
|
|
|
# Emit a DWARF .debug_ranges unit.
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if you want to emit 64-bit DWARF
|
|
# default = 0 (32-bit)
|
|
#
|
|
# BODY is Tcl code that emits the content of the .debug_ranges
|
|
# unit, it is evaluated in the caller's context.
|
|
proc ranges {options body} {
|
|
variable _debug_ranges_64_bit
|
|
|
|
foreach { name value } $options {
|
|
switch -exact -- $name {
|
|
is_64 { set _debug_ranges_64_bit [subst $value] }
|
|
default { error "unknown option $name" }
|
|
}
|
|
}
|
|
|
|
set section ".debug_ranges"
|
|
_section $section
|
|
|
|
proc sequence { body } {
|
|
variable _debug_ranges_64_bit
|
|
|
|
# Emit the sequence of addresses.
|
|
|
|
proc base { addr } {
|
|
variable _debug_ranges_64_bit
|
|
|
|
if {$_debug_ranges_64_bit} {
|
|
_op .8byte 0xffffffffffffffff "Base Marker"
|
|
_op .8byte $addr "Base Address"
|
|
} else {
|
|
_op .4byte 0xffffffff "Base Marker"
|
|
_op .4byte $addr "Base Address"
|
|
}
|
|
}
|
|
|
|
proc range { start end } {
|
|
variable _debug_ranges_64_bit
|
|
|
|
if {$_debug_ranges_64_bit} {
|
|
_op .8byte $start "Start Address"
|
|
_op .8byte $end "End Address"
|
|
} else {
|
|
_op .4byte $start "Start Address"
|
|
_op .4byte $end "End Address"
|
|
}
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
# End of the sequence.
|
|
if {$_debug_ranges_64_bit} {
|
|
_op .8byte 0x0 "End of Sequence Marker (Part 1)"
|
|
_op .8byte 0x0 "End of Sequence Marker (Part 2)"
|
|
} else {
|
|
_op .4byte 0x0 "End of Sequence Marker (Part 1)"
|
|
_op .4byte 0x0 "End of Sequence Marker (Part 2)"
|
|
}
|
|
}
|
|
|
|
uplevel $body
|
|
}
|
|
|
|
# Emit a DWARF .debug_rnglists section.
|
|
#
|
|
# The target address size is based on the current target's address size.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the section. It is
|
|
# evaluated in the caller's context.
|
|
#
|
|
# The `is-64 true|false` options tells whether to use 64-bit DWARF instead
|
|
# of 32-bit DWARF. The default is 32-bit.
|
|
|
|
proc rnglists { options body } {
|
|
variable _debug_rnglists_addr_size
|
|
variable _debug_rnglists_offset_size
|
|
variable _debug_rnglists_is_64_dwarf
|
|
|
|
parse_options {{"is-64" "false"}}
|
|
|
|
if [is_64_target] {
|
|
set _debug_rnglists_addr_size 8
|
|
} else {
|
|
set _debug_rnglists_addr_size 4
|
|
}
|
|
|
|
if { ${is-64} } {
|
|
set _debug_rnglists_offset_size 8
|
|
set _debug_rnglists_is_64_dwarf true
|
|
} else {
|
|
set _debug_rnglists_offset_size 4
|
|
set _debug_rnglists_is_64_dwarf false
|
|
}
|
|
|
|
_section ".debug_rnglists"
|
|
|
|
# Count of tables in the section.
|
|
variable _debug_rnglists_table_count 0
|
|
|
|
# Compute the label name for list at index LIST_IDX, for the current
|
|
# table.
|
|
|
|
proc _compute_list_label { list_idx } {
|
|
variable _debug_rnglists_table_count
|
|
|
|
return ".Lrnglists_table_${_debug_rnglists_table_count}_list_${list_idx}"
|
|
}
|
|
|
|
with_override Dwarf::table Dwarf::_rnglists_table {
|
|
uplevel $body
|
|
}
|
|
}
|
|
|
|
# Generate one rnglists table (header + offset array + range lists).
|
|
#
|
|
# This proc is meant to be used within proc rnglists' body. It is made
|
|
# available as `table` while inside proc rnglists' body.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the table. It may call
|
|
# the LIST_ procedure to generate rnglists. It is evaluated in the
|
|
# caller's context.
|
|
#
|
|
# The `post-header-label` option can be used to define a label just after
|
|
# the header of the table. This is the label that a DW_AT_rnglists_base
|
|
# attribute will usually refer to.
|
|
#
|
|
# The `with-offset-array true|false` option can be used to control whether
|
|
# the headers of the location list tables have an array of offset. The
|
|
# default is true.
|
|
|
|
proc _rnglists_table { options body } {
|
|
variable _debug_rnglists_table_count
|
|
variable _debug_rnglists_addr_size
|
|
variable _debug_rnglists_offset_size
|
|
variable _debug_rnglists_is_64_dwarf
|
|
|
|
parse_options {
|
|
{post-header-label ""}
|
|
{with-offset-array true}
|
|
}
|
|
|
|
# Count of lists in the table.
|
|
variable _debug_rnglists_list_count 0
|
|
|
|
# Generate the lists ops first, because we need to know how many
|
|
# lists there are to generate the header and offset table.
|
|
set lists_ops [_defer_to_string {
|
|
with_override Dwarf::list_ Dwarf::_rnglists_list {
|
|
uplevel $body
|
|
}
|
|
}]
|
|
|
|
set post_unit_len_label \
|
|
[_compute_label "rnglists_table_${_debug_rnglists_table_count}_post_unit_len"]
|
|
set post_header_label \
|
|
[_compute_label "rnglists_table_${_debug_rnglists_table_count}_post_header"]
|
|
set table_end_label \
|
|
[_compute_label "rnglists_table_${_debug_rnglists_table_count}_end"]
|
|
|
|
# Emit the table header.
|
|
if { $_debug_rnglists_is_64_dwarf } {
|
|
_op .4byte 0xffffffff "unit length 1/2"
|
|
_op .8byte "$table_end_label - $post_unit_len_label" "unit length 2/2"
|
|
} else {
|
|
_op .4byte "$table_end_label - $post_unit_len_label" "unit length"
|
|
}
|
|
|
|
define_label $post_unit_len_label
|
|
|
|
_op .2byte 5 "dwarf version"
|
|
_op .byte $_debug_rnglists_addr_size "address size"
|
|
_op .byte 0 "segment selector size"
|
|
|
|
if { ${with-offset-array} } {
|
|
_op .4byte "$_debug_rnglists_list_count" "offset entry count"
|
|
} else {
|
|
_op .4byte 0 "offset entry count"
|
|
}
|
|
|
|
define_label $post_header_label
|
|
|
|
# Define the user post-header label, if provided.
|
|
if { ${post-header-label} != "" } {
|
|
define_label ${post-header-label}
|
|
}
|
|
|
|
# Emit the offset array.
|
|
if { ${with-offset-array} } {
|
|
for {set list_idx 0} {$list_idx < $_debug_rnglists_list_count} {incr list_idx} {
|
|
set list_label [_compute_list_label $list_idx]
|
|
_op_offset $_debug_rnglists_offset_size \
|
|
"$list_label - $post_header_label" \
|
|
"offset of list $list_idx"
|
|
}
|
|
}
|
|
|
|
# Emit the actual list data.
|
|
_emit "$lists_ops"
|
|
|
|
define_label $table_end_label
|
|
|
|
incr _debug_rnglists_table_count
|
|
}
|
|
|
|
# Generate one rnglists range list.
|
|
#
|
|
# This proc is meant to be used within proc _rnglists_table's body. It is
|
|
# made available as `list_` while inside proc _rnglists_table's body.
|
|
#
|
|
# BODY may call the various procs defined below to generate list entries.
|
|
# They correspond to the range list entry kinds described in section 2.17.3
|
|
# of the DWARF 5 spec.
|
|
#
|
|
# To define a label pointing to the beginning of the list, use the
|
|
# conventional way of declaring and defining labels:
|
|
#
|
|
# declare_labels the_list
|
|
#
|
|
# the_list: list_ { ... }
|
|
|
|
proc _rnglists_list { body } {
|
|
variable _debug_rnglists_list_count
|
|
|
|
# Define a label for this list. It is used to build the offset
|
|
# array later.
|
|
set list_label [_compute_list_label $_debug_rnglists_list_count]
|
|
define_label $list_label
|
|
|
|
with_override Dwarf::start_end Dwarf::_rnglists_start_end {
|
|
uplevel $body
|
|
}
|
|
|
|
# Emit end of list.
|
|
_op .byte 0x00 "DW_RLE_end_of_list"
|
|
|
|
incr _debug_rnglists_list_count
|
|
}
|
|
|
|
# Emit a rnglists DW_RLE_start_end entry.
|
|
#
|
|
# This proc is meant to be used within proc _rnglists_list's body. It is
|
|
# made available as `start_end` while inside proc _rnglists_list's body.
|
|
|
|
proc _rnglists_start_end { start end } {
|
|
variable _debug_rnglists_addr_size
|
|
|
|
_op .byte 0x06 "DW_RLE_start_end"
|
|
_op .${_debug_rnglists_addr_size}byte $start "start"
|
|
_op .${_debug_rnglists_addr_size}byte $end "end"
|
|
}
|
|
|
|
# Emit a DWARF .debug_loclists section.
|
|
#
|
|
# The target address size is based on the current target's address size.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the section. It is
|
|
# evaluated in the caller's context.
|
|
#
|
|
# The `is-64 true|false` options tells whether to use 64-bit DWARF instead
|
|
# of 32-bit DWARF. The default is 32-bit.
|
|
|
|
proc loclists { options body } {
|
|
variable _debug_loclists_addr_size
|
|
variable _debug_loclists_offset_size
|
|
variable _debug_loclists_is_64_dwarf
|
|
|
|
parse_options {{"is-64" "false"}}
|
|
|
|
if [is_64_target] {
|
|
set _debug_loclists_addr_size 8
|
|
} else {
|
|
set _debug_loclists_addr_size 4
|
|
}
|
|
|
|
if { ${is-64} } {
|
|
set _debug_loclists_offset_size 8
|
|
set _debug_loclists_is_64_dwarf true
|
|
} else {
|
|
set _debug_loclists_offset_size 4
|
|
set _debug_loclists_is_64_dwarf false
|
|
}
|
|
|
|
_section ".debug_loclists"
|
|
|
|
# Count of tables in the section.
|
|
variable _debug_loclists_table_count 0
|
|
|
|
# Compute the label name for list at index LIST_IDX, for the current
|
|
# table.
|
|
|
|
proc _compute_list_label { list_idx } {
|
|
variable _debug_loclists_table_count
|
|
|
|
return ".Lloclists_table_${_debug_loclists_table_count}_list_${list_idx}"
|
|
}
|
|
|
|
with_override Dwarf::table Dwarf::_loclists_table {
|
|
uplevel $body
|
|
}
|
|
}
|
|
|
|
# Generate one loclists table (header + offset array + location lists).
|
|
#
|
|
# This proc is meant to be used within proc loclists' body. It is made
|
|
# available as `table` while inside proc rnglists' body.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the table. It may call
|
|
# the LIST_ procedure to generate rnglists. It is evaluated in the
|
|
# caller's context.
|
|
#
|
|
# The `post-header-label` option can be used to define a label just after
|
|
# the header of the table. This is the label that a DW_AT_loclists_base
|
|
# attribute will usually refer to.
|
|
#
|
|
# The `with-offset-array true|false` option can be used to control
|
|
# whether the headers of the location list tables have an array of
|
|
# offset. The default is true.
|
|
|
|
proc _loclists_table { options body } {
|
|
variable _debug_loclists_table_count
|
|
variable _debug_loclists_addr_size
|
|
variable _debug_loclists_offset_size
|
|
variable _debug_loclists_is_64_dwarf
|
|
|
|
parse_options {
|
|
{post-header-label ""}
|
|
{with-offset-array true}
|
|
}
|
|
|
|
# Count of lists in the table.
|
|
variable _debug_loclists_list_count 0
|
|
|
|
# Generate the lists ops first, because we need to know how many
|
|
# lists there are to generate the header and offset table.
|
|
set lists_ops [_defer_to_string {
|
|
with_override Dwarf::list_ Dwarf::_loclists_list {
|
|
uplevel $body
|
|
}
|
|
}]
|
|
|
|
set post_unit_len_label \
|
|
[_compute_label "loclists_table_${_debug_loclists_table_count}_post_unit_len"]
|
|
set post_header_label \
|
|
[_compute_label "loclists_table_${_debug_loclists_table_count}_post_header"]
|
|
set table_end_label \
|
|
[_compute_label "loclists_table_${_debug_loclists_table_count}_end"]
|
|
|
|
# Emit the table header.
|
|
if { $_debug_loclists_is_64_dwarf } {
|
|
_op .4byte 0xffffffff "unit length 1/2"
|
|
_op .8byte "$table_end_label - $post_unit_len_label" "unit length 2/2"
|
|
} else {
|
|
_op .4byte "$table_end_label - $post_unit_len_label" "unit length"
|
|
}
|
|
|
|
define_label $post_unit_len_label
|
|
|
|
_op .2byte 5 "DWARF version"
|
|
_op .byte $_debug_loclists_addr_size "address size"
|
|
_op .byte 0 "segment selector size"
|
|
|
|
if { ${with-offset-array} } {
|
|
_op .4byte "$_debug_loclists_list_count" "offset entry count"
|
|
} else {
|
|
_op .4byte 0 "offset entry count"
|
|
}
|
|
|
|
define_label $post_header_label
|
|
|
|
# Define the user post-header label, if provided.
|
|
if { ${post-header-label} != "" } {
|
|
define_label ${post-header-label}
|
|
}
|
|
|
|
# Emit the offset array.
|
|
if { ${with-offset-array} } {
|
|
for {set list_idx 0} {$list_idx < $_debug_loclists_list_count} {incr list_idx} {
|
|
set list_label [_compute_list_label $list_idx]
|
|
_op_offset $_debug_loclists_offset_size \
|
|
"$list_label - $post_header_label" \
|
|
"offset of list $list_idx"
|
|
}
|
|
}
|
|
|
|
# Emit the actual list data.
|
|
_emit "$lists_ops"
|
|
|
|
define_label $table_end_label
|
|
|
|
incr _debug_loclists_table_count
|
|
}
|
|
|
|
# Generate one loclists location list.
|
|
#
|
|
# This proc is meant to be used within proc _loclists_table's body. It is
|
|
# made available as `list_` while inside proc _loclists_table's body.
|
|
#
|
|
# BODY may call the various procs defined below to generate list
|
|
# entries. They correspond to the location list entry kinds
|
|
# described in section 2.6.2 of the DWARF 5 spec.
|
|
#
|
|
# To define a label pointing to the beginning of the list, use
|
|
# the conventional way of declaring and defining labels:
|
|
#
|
|
# declare_labels the_list
|
|
#
|
|
# the_list: list_ {
|
|
# ...
|
|
# }
|
|
|
|
proc _loclists_list { body } {
|
|
variable _debug_loclists_list_count
|
|
|
|
# Count the location descriptions in this list.
|
|
variable _debug_loclists_locdesc_count 0
|
|
|
|
# Define a label for this list. It is used to build the offset
|
|
# array later.
|
|
set list_label [_compute_list_label $_debug_loclists_list_count]
|
|
define_label $list_label
|
|
|
|
with_override Dwarf::start_length Dwarf::_loclists_start_length {
|
|
with_override Dwarf::base_address Dwarf::_loclists_base_address {
|
|
with_override Dwarf::start_end Dwarf::_loclists_start_end {
|
|
uplevel $body
|
|
}}}
|
|
|
|
# Emit end of list.
|
|
_op .byte 0x00 "DW_LLE_end_of_list"
|
|
|
|
incr _debug_loclists_list_count
|
|
}
|
|
|
|
# Emit a DW_LLE_start_length entry.
|
|
#
|
|
# This proc is meant to be used within proc _loclists_list's body. It is
|
|
# made available as `start_length` while inside proc _loclists_list's body.
|
|
|
|
proc _loclists_start_length { start length locdesc } {
|
|
variable _debug_loclists_is_64_dwarf
|
|
variable _debug_loclists_addr_size
|
|
variable _debug_loclists_offset_size
|
|
variable _debug_loclists_table_count
|
|
variable _debug_loclists_list_count
|
|
variable _debug_loclists_locdesc_count
|
|
|
|
set locdesc [uplevel [list subst $locdesc]]
|
|
|
|
_op .byte 0x08 "DW_LLE_start_length"
|
|
|
|
# Start and end of the address range.
|
|
_op .${_debug_loclists_addr_size}byte $start "start"
|
|
_op .uleb128 $length "length"
|
|
|
|
# Length of location description.
|
|
set locdesc_start_label ".Lloclists_table_${_debug_loclists_table_count}_list_${_debug_loclists_list_count}_locdesc_${_debug_loclists_locdesc_count}_start"
|
|
set locdesc_end_label ".Lloclists_table_${_debug_loclists_table_count}_list_${_debug_loclists_list_count}_locdesc_${_debug_loclists_locdesc_count}_end"
|
|
_op .uleb128 "$locdesc_end_label - $locdesc_start_label" "locdesc length"
|
|
|
|
define_label $locdesc_start_label
|
|
set dwarf_version 5
|
|
_location $locdesc $dwarf_version $_debug_loclists_addr_size $_debug_loclists_offset_size
|
|
define_label $locdesc_end_label
|
|
|
|
incr _debug_loclists_locdesc_count
|
|
}
|
|
|
|
# Emit a DW_LLE_start_end entry.
|
|
#
|
|
# This proc is meant to be used within proc _loclists_list's body. It is
|
|
# made available as `start_end` while inside proc _loclists_list's body.
|
|
|
|
proc _loclists_start_end { start end locdesc } {
|
|
variable _debug_loclists_is_64_dwarf
|
|
variable _debug_loclists_addr_size
|
|
variable _debug_loclists_offset_size
|
|
variable _debug_loclists_table_count
|
|
variable _debug_loclists_list_count
|
|
variable _debug_loclists_locdesc_count
|
|
|
|
set locdesc [uplevel [list subst $locdesc]]
|
|
|
|
_op .byte 0x07 "DW_LLE_start_end"
|
|
|
|
# Start and end of the address range.
|
|
_op .${_debug_loclists_addr_size}byte $start "start"
|
|
_op .${_debug_loclists_addr_size}byte $end "end"
|
|
|
|
# Length of location description.
|
|
set locdesc_start_label ".Lloclists_table_${_debug_loclists_table_count}_list_${_debug_loclists_list_count}_locdesc_${_debug_loclists_locdesc_count}_start"
|
|
set locdesc_end_label ".Lloclists_table_${_debug_loclists_table_count}_list_${_debug_loclists_list_count}_locdesc_${_debug_loclists_locdesc_count}_end"
|
|
_op .uleb128 "$locdesc_end_label - $locdesc_start_label" "locdesc length"
|
|
|
|
define_label $locdesc_start_label
|
|
set dwarf_version 5
|
|
_location $locdesc $dwarf_version $_debug_loclists_addr_size $_debug_loclists_offset_size
|
|
define_label $locdesc_end_label
|
|
|
|
incr _debug_loclists_locdesc_count
|
|
}
|
|
|
|
# Emit a DW_LLE_base_address entry.
|
|
proc _loclists_base_address {addr} {
|
|
variable _debug_loclists_addr_size
|
|
variable _debug_loclists_locdesc_count
|
|
_op .byte 0x06 "DW_LLE_base_address"
|
|
_op .${_debug_loclists_addr_size}byte $addr "base_address"
|
|
incr _debug_loclists_locdesc_count
|
|
}
|
|
|
|
# Emit a DWARF .debug_macro section.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the section. It is
|
|
# evaluated in the caller's context. The body can use the `unit` proc
|
|
# (see `_macro_unit`) to generate macro units.
|
|
|
|
proc macro { body } {
|
|
_section ".debug_macro"
|
|
|
|
with_override Dwarf::unit Dwarf::_macro_unit {
|
|
uplevel $body
|
|
}
|
|
}
|
|
|
|
# Generate one macro unit.
|
|
#
|
|
# This proc is meant to be used within proc macro's body. It is made
|
|
# available as `unit` while inside proc macro's body.
|
|
#
|
|
# BODY must be Tcl code that emits the content of the unit. It may call
|
|
# procedures defined below, prefixed with `_macro_unit_`, to generate the
|
|
# unit's content. It is evaluated in the caller's context.
|
|
#
|
|
# The `is-64 true|false` options tells whether to use 64-bit DWARF instead
|
|
# of 32-bit DWARF. The default is 32-bit.
|
|
#
|
|
# If specified, the `debug-line-offset-label` option is the name of a label
|
|
# to use for the unit header's `debug_line_offset` field value. If
|
|
# omitted, the unit header will not contain the `debug_line_offset` field.
|
|
|
|
proc _macro_unit { options body } {
|
|
parse_options {
|
|
{"is-64" "false"}
|
|
{"debug-line-offset-label" ""}
|
|
}
|
|
|
|
_op .2byte 5 "version"
|
|
|
|
# Flags:
|
|
#
|
|
# offset_size_flag = set if is-64 is true
|
|
# debug_line_offset_flag = set if debug-line-offset-label is set
|
|
# opcode_operands_table_flag = 0
|
|
set flags 0
|
|
|
|
if { ${is-64} } {
|
|
set flags [expr $flags | 0x1]
|
|
}
|
|
|
|
if { ${debug-line-offset-label} != "" } {
|
|
set flags [expr $flags | 0x2]
|
|
}
|
|
|
|
_op .byte $flags "flags"
|
|
|
|
if { ${debug-line-offset-label} != "" } {
|
|
_op_offset [expr ${is-64} ? 8 : 4] ${debug-line-offset-label} \
|
|
"debug_line offset"
|
|
}
|
|
|
|
with_override Dwarf::define Dwarf::_macro_unit_define {
|
|
with_override Dwarf::start_file Dwarf::_macro_unit_start_file {
|
|
with_override Dwarf::end_file Dwarf::_macro_unit_end_file {
|
|
uplevel $body
|
|
}}}
|
|
}
|
|
|
|
# Emit a DW_MACRO_define entry.
|
|
|
|
proc _macro_unit_define { lineno text } {
|
|
_op .byte 0x1 "DW_MACRO_define"
|
|
_op .uleb128 $lineno "Line number"
|
|
_op .asciz "\"$text\"" "Macro definition"
|
|
}
|
|
|
|
# Emit a DW_MACRO_start_file entry.
|
|
|
|
proc _macro_unit_start_file { lineno file_idx } {
|
|
_op .byte 0x3 "DW_MACRO_start_file"
|
|
_op .uleb128 $lineno
|
|
_op .uleb128 $file_idx
|
|
}
|
|
|
|
# Emit a DW_MACRO_end_file entry.
|
|
|
|
proc _macro_unit_end_file {} {
|
|
_op .byte 0x4 "DW_MACRO_end_file"
|
|
}
|
|
|
|
# Emit a DWARF .debug_line unit.
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if you want to emit 64-bit DWARF
|
|
# default = 0 (32-bit)
|
|
# version n - DWARF version number to emit
|
|
# default = 4
|
|
# addr_size n - the size of addresses in bytes: 4, 8, or default
|
|
# default = default
|
|
# seg_sel_size n
|
|
# - the size of segment selector_size in bytes:
|
|
# default = 0
|
|
#
|
|
# LABEL is the label of the current unit (which is probably
|
|
# referenced by a DW_AT_stmt_list), or "" if there is no such
|
|
# label.
|
|
#
|
|
# BODY is Tcl code that emits the parts which make up the body of
|
|
# the line unit. It is evaluated in the caller's context. The
|
|
# following commands are available for the BODY section:
|
|
#
|
|
# include_dir "dirname" -- adds a new include directory
|
|
#
|
|
# file_name "file.c" idx -- adds a new file name. IDX is a
|
|
# 1-based index referencing an include directory or 0 for
|
|
# current directory.
|
|
|
|
proc lines {options label body} {
|
|
variable _line_count
|
|
variable _line_include_dirs
|
|
variable _line_file_names
|
|
variable _line_header_finalized
|
|
variable _line_header_end_label
|
|
variable _line_unit_version
|
|
variable _line_is_64
|
|
variable _line_string_form
|
|
|
|
# Establish the defaults.
|
|
set _line_is_64 0
|
|
set _line_unit_version 4
|
|
set _unit_addr_size default
|
|
set _line_include_dirs {}
|
|
set _line_file_names {}
|
|
set _line_header_finalized 0
|
|
set _default_is_stmt 1
|
|
set _seg_sel_size 0
|
|
#set _line_string_form string
|
|
set _line_string_form line_strp
|
|
|
|
foreach { name value } $options {
|
|
switch -exact -- $name {
|
|
is_64 { set _line_is_64 $value }
|
|
version { set _line_unit_version $value }
|
|
addr_size { set _unit_addr_size $value }
|
|
seg_sel_size { set _seg_sel_size $value }
|
|
default_is_stmt { set _default_is_stmt $value }
|
|
string_form { set _line_string_form $value }
|
|
default { error "unknown option $name" }
|
|
}
|
|
}
|
|
if {$_unit_addr_size == "default"} {
|
|
if {[is_64_target]} {
|
|
set _unit_addr_size 8
|
|
} else {
|
|
set _unit_addr_size 4
|
|
}
|
|
}
|
|
|
|
set unit_num [incr _line_count]
|
|
|
|
set section ".debug_line"
|
|
_section $section
|
|
|
|
if { "$label" != "" } {
|
|
# Define the user-provided label at this point.
|
|
$label:
|
|
}
|
|
|
|
set unit_len_label [_compute_label "line${_line_count}_start"]
|
|
set unit_end_label [_compute_label "line${_line_count}_end"]
|
|
set header_len_label [_compute_label "line${_line_count}_header_start"]
|
|
set _line_header_end_label [_compute_label "line${_line_count}_header_end"]
|
|
|
|
if {$_line_is_64} {
|
|
_op .4byte 0xffffffff
|
|
_op .8byte "$unit_end_label - $unit_len_label" "unit_length"
|
|
} else {
|
|
_op .4byte "$unit_end_label - $unit_len_label" "unit_length"
|
|
}
|
|
|
|
define_label $unit_len_label
|
|
|
|
_op .2byte $_line_unit_version version
|
|
|
|
if { $_line_unit_version >= 5 } {
|
|
_op .byte $_unit_addr_size "address_size"
|
|
# Hardcode to 0 for now.
|
|
_op .byte $_seg_sel_size "seg_sel_size"
|
|
}
|
|
|
|
if {$_line_is_64} {
|
|
_op .8byte "$_line_header_end_label - $header_len_label" "header_length"
|
|
} else {
|
|
_op .4byte "$_line_header_end_label - $header_len_label" "header_length"
|
|
}
|
|
|
|
define_label $header_len_label
|
|
|
|
_op .byte 1 "minimum_instruction_length"
|
|
if { $_line_unit_version >= 4 } {
|
|
# Assume non-VLIW for now.
|
|
_op .byte 1 "maximum_operations_per_instruction"
|
|
}
|
|
_op .byte $_default_is_stmt "default_is_stmt"
|
|
_op .byte 1 "line_base"
|
|
_op .byte 1 "line_range"
|
|
_op .byte 12 "opcode_base"
|
|
|
|
# The standard_opcode_lengths table. The number of arguments
|
|
# for each of the standard opcodes. Generating 11 entries here
|
|
# matches the use of 12 in the opcode_base above. These 10
|
|
# entries match the 9 standard opcodes for DWARF2 plus
|
|
# DW_LNS_prologue_end and DW_LNS_epilogue_begin from DWARF3.
|
|
_op .byte 0 "standard opcode 1"
|
|
_op .byte 1 "standard opcode 2"
|
|
_op .byte 1 "standard opcode 3"
|
|
_op .byte 1 "standard opcode 4"
|
|
_op .byte 1 "standard opcode 5"
|
|
_op .byte 0 "standard opcode 6"
|
|
_op .byte 0 "standard opcode 7"
|
|
_op .byte 0 "standard opcode 8"
|
|
_op .byte 1 "standard opcode 9"
|
|
_op .byte 0 "standard opcode 10"
|
|
_op .byte 0 "standard opcode 11"
|
|
|
|
# Add a directory entry to the line table header's directory table.
|
|
#
|
|
# Return the index by which this entry can be referred to.
|
|
proc include_dir {dirname} {
|
|
variable _line_include_dirs
|
|
lappend _line_include_dirs $dirname
|
|
|
|
if { $Dwarf::_line_unit_version >= 5 } {
|
|
return [expr [llength $_line_include_dirs] - 1]
|
|
} else {
|
|
return [llength $_line_include_dirs]
|
|
}
|
|
}
|
|
|
|
# Add a file name entry to the line table header's file names table.
|
|
#
|
|
# Return the index by which this entry can be referred to.
|
|
proc file_name {filename diridx} {
|
|
variable _line_file_names
|
|
lappend _line_file_names $filename $diridx
|
|
|
|
set nr_filenames [expr [llength $_line_file_names] / 2]
|
|
if { $Dwarf::_line_unit_version >= 5 } {
|
|
return [expr $nr_filenames - 1]
|
|
} else {
|
|
return $nr_filenames
|
|
}
|
|
}
|
|
|
|
proc _line_finalize_header {} {
|
|
variable _line_header_finalized
|
|
if { $_line_header_finalized } {
|
|
return
|
|
}
|
|
set _line_header_finalized 1
|
|
|
|
variable _line_include_dirs
|
|
variable _line_file_names
|
|
|
|
variable _line_unit_version
|
|
variable _line_is_64
|
|
variable _line_string_form
|
|
if { $_line_unit_version >= 5 } {
|
|
_op .byte 1 "directory_entry_format_count"
|
|
_op .uleb128 1 \
|
|
"directory_entry_format (content type code: DW_LNCT_path)"
|
|
switch $_line_string_form {
|
|
string {
|
|
_op .uleb128 0x08 \
|
|
"directory_entry_format (form: DW_FORM_string)"
|
|
}
|
|
line_strp {
|
|
_op .uleb128 0x1f \
|
|
"directory_entry_format (form: DW_FORM_line_strp)"
|
|
}
|
|
}
|
|
|
|
set nr_dirs [llength $_line_include_dirs]
|
|
_op .byte $nr_dirs "directory_count"
|
|
|
|
foreach dirname $_line_include_dirs {
|
|
switch $_line_string_form {
|
|
string {
|
|
_op .ascii [_quote $dirname]
|
|
}
|
|
line_strp {
|
|
declare_labels string_ptr
|
|
_defer_output .debug_line_str {
|
|
string_ptr:
|
|
_op .ascii [_quote $dirname]
|
|
}
|
|
_op_offset [expr $_line_is_64 ? 8 : 4] $string_ptr
|
|
}
|
|
}
|
|
}
|
|
|
|
_op .byte 2 "file_name_entry_format_count"
|
|
_op .uleb128 1 \
|
|
"file_name_entry_format (content type code: DW_LNCT_path)"
|
|
switch $_line_string_form {
|
|
string {
|
|
_op .uleb128 0x08 \
|
|
"directory_entry_format (form: DW_FORM_string)"
|
|
}
|
|
line_strp {
|
|
_op .uleb128 0x1f \
|
|
"directory_entry_format (form: DW_FORM_line_strp)"
|
|
}
|
|
}
|
|
_op .uleb128 2 \
|
|
"file_name_entry_format (content type code: DW_LNCT_directory_index)"
|
|
_op .uleb128 0x0f \
|
|
"file_name_entry_format (form: DW_FORM_udata)"
|
|
|
|
set nr_files [expr [llength $_line_file_names] / 2]
|
|
_op .byte $nr_files "file_names_count"
|
|
|
|
foreach { filename diridx } $_line_file_names {
|
|
switch $_line_string_form {
|
|
string {
|
|
_op .ascii [_quote $filename]
|
|
}
|
|
line_strp {
|
|
declare_labels string_ptr
|
|
_defer_output .debug_line_str {
|
|
string_ptr:
|
|
_op .ascii [_quote $filename]
|
|
}
|
|
_op_offset [expr $_line_is_64 ? 8 : 4] $string_ptr
|
|
}
|
|
}
|
|
_op .uleb128 $diridx
|
|
}
|
|
} else {
|
|
foreach dirname $_line_include_dirs {
|
|
_op .ascii [_quote $dirname]
|
|
}
|
|
|
|
_op .byte 0 "Terminator (include_directories)"
|
|
|
|
foreach { filename diridx } $_line_file_names {
|
|
_op .ascii [_quote $filename]
|
|
_op .sleb128 $diridx
|
|
_op .sleb128 0 "mtime"
|
|
_op .sleb128 0 "length"
|
|
}
|
|
|
|
_op .byte 0 "Terminator (file_names)"
|
|
}
|
|
|
|
set _line_include_dirs {}
|
|
set _line_file_names {}
|
|
|
|
variable _line_header_end_label
|
|
define_label $_line_header_end_label
|
|
}
|
|
|
|
proc program { body } {
|
|
variable _line_header_end_label
|
|
variable _line
|
|
variable _line_address_update
|
|
variable _line_program_terminated
|
|
|
|
|
|
set _line 1
|
|
set _line_address_update 0
|
|
set _line_program_terminated 0
|
|
|
|
_line_finalize_header
|
|
|
|
proc DW_LNE_set_address {addr} {
|
|
variable _line_address_update
|
|
set _line_address_update 1
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 0
|
|
set start [new_label "set_address_start"]
|
|
set end [new_label "set_address_end"]
|
|
_op .uleb128 "${end} - ${start}"
|
|
define_label ${start}
|
|
_op .byte 2
|
|
if {[is_64_target]} {
|
|
_op .8byte ${addr}
|
|
} else {
|
|
_op .4byte ${addr}
|
|
}
|
|
define_label ${end}
|
|
}
|
|
|
|
proc DW_LNE_end_sequence {} {
|
|
variable _line_address_update
|
|
if { $_line_address_update == 0 } {
|
|
error "Missing address update for end_sequence"
|
|
}
|
|
set _line_address_update 0
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 1
|
|
variable _line
|
|
_op .byte 0
|
|
_op .uleb128 1
|
|
_op .byte 1
|
|
set _line 1
|
|
}
|
|
|
|
proc DW_LNE_user { len opcode } {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
set DW_LNE_lo_usr 0x80
|
|
set DW_LNE_hi_usr 0xff
|
|
if { $DW_LNE_lo_usr <= $opcode
|
|
&& $opcode <= $DW_LNE_hi_usr } {
|
|
_op .byte 0
|
|
_op .uleb128 $len
|
|
_op .byte $opcode
|
|
for {set i 1} {$i < $len} {incr i} {
|
|
_op .byte 0
|
|
}
|
|
} else {
|
|
error "unknown vendor specific extended opcode: $opcode"
|
|
}
|
|
}
|
|
|
|
proc DW_LNS_copy {} {
|
|
variable _line_address_update
|
|
if { $_line_address_update == 0 } {
|
|
error "Missing address update for copy"
|
|
}
|
|
set _line_address_update 0
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 1
|
|
}
|
|
|
|
proc DW_LNS_negate_stmt {} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 6
|
|
}
|
|
|
|
proc DW_LNS_set_prologue_end {} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 0x0a
|
|
}
|
|
|
|
proc DW_LNS_set_epilogue_begin {} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 0x0b
|
|
}
|
|
|
|
proc DW_LNS_advance_pc {offset} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
variable _line_address_update
|
|
set _line_address_update 1
|
|
_op .byte 2
|
|
_op .uleb128 ${offset}
|
|
}
|
|
|
|
proc DW_LNS_advance_line {offset} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
variable _line
|
|
_op .byte 3
|
|
_op .sleb128 ${offset}
|
|
set _line [expr $_line + $offset]
|
|
}
|
|
|
|
# A pseudo line number program instruction, that can be used instead
|
|
# of DW_LNS_advance_line. Rather than writing:
|
|
# {DW_LNS_advance_line [expr $line1 - 1]}
|
|
# {DW_LNS_advance_line [expr $line2 - $line1]}
|
|
# {DW_LNS_advance_line [expr $line3 - $line2]}
|
|
# we can just write:
|
|
# {line $line1}
|
|
# {line $line2}
|
|
# {line $line3}
|
|
proc line {line} {
|
|
variable _line
|
|
set offset [expr $line - $_line]
|
|
DW_LNS_advance_line $offset
|
|
}
|
|
|
|
proc DW_LNS_set_file {num} {
|
|
variable _line_program_terminated
|
|
set _line_program_terminated 0
|
|
_op .byte 4
|
|
_op .sleb128 ${num}
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
if { $_line_program_terminated == 0 } {
|
|
error "Missing end_seq"
|
|
}
|
|
}
|
|
|
|
uplevel $body
|
|
|
|
rename include_dir ""
|
|
rename file_name ""
|
|
|
|
_line_finalize_header
|
|
|
|
define_label $unit_end_label
|
|
}
|
|
|
|
# Emit a DWARF .debug_aranges entry.
|
|
|
|
proc arange { options arange_start arange_length } {
|
|
parse_options {
|
|
{ comment "" }
|
|
{ seg_sel "" }
|
|
}
|
|
|
|
if { $comment != "" } {
|
|
# Wrap
|
|
set comment " ($comment)"
|
|
}
|
|
|
|
if { $seg_sel != "" } {
|
|
variable _seg_size
|
|
if { $_seg_size == 8 } {
|
|
set seg_op .8byte
|
|
} elseif { $_seg_size == 4 } {
|
|
set seg_op .4byte
|
|
} else {
|
|
error \
|
|
"Don't know how to handle segment selector size $_seg_size"
|
|
}
|
|
_op $seg_op $seg_sel "Address range segment selector$comment"
|
|
}
|
|
|
|
variable _addr_size
|
|
if { $_addr_size == 8 } {
|
|
set addr_op .8byte
|
|
} elseif { $_addr_size == 4 } {
|
|
set addr_op .4byte
|
|
}
|
|
|
|
_op $addr_op $arange_start "Address range start$comment"
|
|
_op $addr_op $arange_length "Address range length$comment"
|
|
}
|
|
|
|
# Emit a DWARF .debug_aranges unit.
|
|
#
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if you want to emit 64-bit DWARF
|
|
# default = 0 (32-bit)
|
|
# cu_is_64 0|1 - boolean indicating if LABEL refers to a 64-bit DWARF CU
|
|
# default = 0 (32-bit)
|
|
# section_version n
|
|
# - section version number to emit
|
|
# default = 2
|
|
# seg_size n - the size of the adress selector in bytes: 0, 4, or 8
|
|
# default = 0
|
|
#
|
|
# LABEL is the label of the corresponding CU.
|
|
#
|
|
# BODY is Tcl code that emits the parts which make up the body of
|
|
# the aranges unit. It is evaluated in the caller's context. The
|
|
# following commands are available for the BODY section:
|
|
#
|
|
# arange [-c <comment>] [<segment selector>] <start> <length>
|
|
# -- adds an address range.
|
|
|
|
proc aranges { options label body } {
|
|
variable _addr_size
|
|
variable _seg_size
|
|
|
|
# Handle options.
|
|
parse_options {
|
|
{ is_64 0 }
|
|
{ cu_is_64 0 }
|
|
{ section_version 2 }
|
|
{ seg_size 0 }
|
|
}
|
|
set _seg_size $seg_size
|
|
|
|
if { [is_64_target] } {
|
|
set _addr_size 8
|
|
} else {
|
|
set _addr_size 4
|
|
}
|
|
|
|
# Switch to .debug_aranges section.
|
|
_section .debug_aranges
|
|
|
|
# Keep track of offset from start of section entry to determine
|
|
# padding amount.
|
|
set offset 0
|
|
|
|
# Initial length.
|
|
declare_labels aranges_start aranges_end
|
|
set length "$aranges_end - $aranges_start"
|
|
set comment "Length"
|
|
if { $is_64 } {
|
|
_op .4byte 0xffffffff
|
|
_op .8byte $length $comment
|
|
incr offset 12
|
|
} else {
|
|
_op .4byte $length $comment
|
|
incr offset 4
|
|
}
|
|
|
|
# Start label.
|
|
aranges_start:
|
|
|
|
# Section version.
|
|
_op .2byte $section_version "Section version"
|
|
incr offset 2
|
|
|
|
# Offset into .debug_info.
|
|
upvar $label my_label
|
|
if { $cu_is_64 } {
|
|
_op .8byte $my_label "Offset into .debug_info"
|
|
incr offset 8
|
|
} else {
|
|
_op .4byte $my_label "Offset into .debug_info"
|
|
incr offset 4
|
|
}
|
|
|
|
# Address size.
|
|
_op .byte $_addr_size "Address size"
|
|
incr offset
|
|
|
|
# Segment selector size.
|
|
_op .byte $_seg_size "Segment selector size"
|
|
incr offset
|
|
|
|
# Padding.
|
|
set tuple_size [expr 2 * $_addr_size + $_seg_size]
|
|
while { 1 } {
|
|
if { [expr $offset % $tuple_size] == 0 } {
|
|
break
|
|
}
|
|
_op .byte 0 "Pad to $tuple_size byte boundary"
|
|
incr offset
|
|
}
|
|
|
|
# Range tuples.
|
|
uplevel $body
|
|
|
|
# Terminator tuple.
|
|
set comment "Terminator"
|
|
if { $_seg_size == 0 } {
|
|
arange {comment $comment} 0 0
|
|
} else {
|
|
arange {comment $comment seg_sel 0} 0 0
|
|
}
|
|
|
|
# End label.
|
|
aranges_end:
|
|
}
|
|
|
|
# Emit a .debug_loc entry.
|
|
|
|
proc _loc_entry { start end location_description } {
|
|
# Determine how to emit addresses.
|
|
variable _addr_size
|
|
if { $_addr_size == 8 } {
|
|
set addr_op .8byte
|
|
} elseif { $_addr_size == 4 } {
|
|
set addr_op .4byte
|
|
}
|
|
|
|
# Emit start and end address.
|
|
_op $addr_op $start "Start address"
|
|
_op $addr_op $end "End address"
|
|
|
|
declare_labels location_description_start
|
|
declare_labels location_description_end
|
|
|
|
# Emit length of location description.
|
|
set len "$location_description_end - $location_description_start"
|
|
_op .2byte $len "Location description length"
|
|
|
|
# Tag start of location description.
|
|
define_label $location_description_start
|
|
|
|
# Emit location description.
|
|
variable _cu_version
|
|
variable _cu_offset_size
|
|
_location $location_description $_cu_version $_addr_size \
|
|
$_cu_offset_size
|
|
|
|
# Tag end of location description.
|
|
define_label $location_description_end
|
|
}
|
|
|
|
# Emit a DWARF .debug_loc contribution.
|
|
#
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# cu_is_64 0|1 - boolean indicating if references from location
|
|
# descriptions refer to a 64-bit DWARF CU.
|
|
# default = 0 (32-bit)
|
|
# cu_version n - section version of DWARF CU referenced from location
|
|
# descriptions.
|
|
# default = 4
|
|
#
|
|
# BODY is Tcl code that emits the parts which make up the body of
|
|
# the debug_loc contribution. It is evaluated in the caller's context.
|
|
# The following command is available for the BODY section:
|
|
#
|
|
# entry <start> <end> <location description>
|
|
# -- emit a .debug_loc entry
|
|
|
|
proc loc { options body } {
|
|
# Handle options.
|
|
parse_options {
|
|
{ cu_version 4 }
|
|
{ cu_is_64 0 }
|
|
}
|
|
|
|
# Export for use in BODY.
|
|
variable _addr_size
|
|
if { [is_64_target] } {
|
|
set _addr_size 8
|
|
} else {
|
|
set _addr_size 4
|
|
}
|
|
variable _cu_version
|
|
set _cu_version $cu_version
|
|
variable _cu_offset_size
|
|
if { $cu_is_64 == 1 } {
|
|
set _cu_offset_size 8
|
|
} else {
|
|
set _cu_offset_size 4
|
|
}
|
|
|
|
# Switch to .debug_loc section.
|
|
_section .debug_loc
|
|
|
|
# Introduce command 'entry'.
|
|
with_override Dwarf::entry Dwarf::_loc_entry {
|
|
# Emit entries.
|
|
uplevel $body
|
|
}
|
|
|
|
# Determine how to emit addresses.
|
|
if { $_addr_size == 8 } {
|
|
set addr_op .8byte
|
|
} elseif { $_addr_size == 4 } {
|
|
set addr_op .4byte
|
|
}
|
|
|
|
# Emit <End of list>.
|
|
set comment "<End of list>"
|
|
_op $addr_op 0 "$comment (Part 1/2)"
|
|
_op $addr_op 0 "$comment (Part 2/2)"
|
|
}
|
|
|
|
proc _empty_array {name} {
|
|
upvar $name the_array
|
|
|
|
catch {unset the_array}
|
|
set the_array(_) {}
|
|
unset the_array(_)
|
|
}
|
|
|
|
# Emit a .gnu_debugaltlink section with the given file name and
|
|
# build-id. The buildid should be represented as a hexadecimal
|
|
# string, like "ffeeddcc".
|
|
proc gnu_debugaltlink {filename buildid} {
|
|
_defer_output .gnu_debugaltlink {
|
|
_op .ascii [_quote $filename]
|
|
foreach {a b} [split $buildid {}] {
|
|
_op .byte 0x$a$b
|
|
}
|
|
}
|
|
}
|
|
|
|
proc _note {type name hexdata} {
|
|
set namelen [expr [string length $name] + 1]
|
|
|
|
# Name size.
|
|
_op .4byte $namelen
|
|
# Data size.
|
|
_op .4byte [expr [string length $hexdata] / 2]
|
|
# Type.
|
|
_op .4byte $type
|
|
# The name.
|
|
_op .ascii [_quote $name]
|
|
# Alignment.
|
|
set align 2
|
|
set total [expr {($namelen + (1 << $align) - 1) & -(1 << $align)}]
|
|
for {set i $namelen} {$i < $total} {incr i} {
|
|
_op .byte 0
|
|
}
|
|
# The data.
|
|
foreach {a b} [split $hexdata {}] {
|
|
_op .byte 0x$a$b
|
|
}
|
|
}
|
|
|
|
# Emit a note section holding the given build-id.
|
|
proc build_id {buildid} {
|
|
_defer_output {.note.gnu.build-id a note} {
|
|
# From elf/common.h.
|
|
set NT_GNU_BUILD_ID 3
|
|
|
|
_note $NT_GNU_BUILD_ID GNU $buildid
|
|
}
|
|
}
|
|
|
|
# Emit a dummy CU.
|
|
proc dummy_cu {} {
|
|
# Generate a CU with default options and empty body.
|
|
cu {label dummy_cu} {
|
|
compile_unit {}
|
|
}
|
|
|
|
# Generate an .debug_aranges entry for the dummy CU.
|
|
aranges {} dummy_cu {
|
|
}
|
|
}
|
|
|
|
# Emit a DWARF .debug_names section.
|
|
#
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# is_64 0|1 - boolean indicating if the section contains 64-bit DWARF.
|
|
# default = 0 (32-bit)
|
|
# version n - section version.
|
|
# default = 5.
|
|
#
|
|
# BODY is Tcl code that emits the parts which make up the body of
|
|
# the .debug_names section. It is evaluated in the caller's context.
|
|
# The following commands are available for the BODY section:
|
|
#
|
|
# cu <cu-label>
|
|
# -- add a CU.
|
|
#
|
|
# name <name> <tag> <cu> <hash>
|
|
# -- add a name.
|
|
|
|
proc debug_names { options body } {
|
|
global decimal
|
|
|
|
parse_options {
|
|
{ is_64 0 }
|
|
{ version 5 }
|
|
}
|
|
|
|
variable _debug_names_offset_size
|
|
if { $is_64 == 1 } {
|
|
set _debug_names_offset_size 8
|
|
} else {
|
|
set _debug_names_offset_size 4
|
|
}
|
|
|
|
# Section start.
|
|
set section ".debug_names"
|
|
_section $section
|
|
|
|
# Header - initial length.
|
|
declare_labels debug_names_start debug_names_end
|
|
set length "$debug_names_end - $debug_names_start"
|
|
set comment "Initial_length"
|
|
if { $is_64 } {
|
|
_op .4byte 0xffffffff
|
|
_op .8byte $length $comment
|
|
} else {
|
|
_op .4byte $length $comment
|
|
}
|
|
|
|
# Header - start label.
|
|
debug_names_start:
|
|
|
|
# Header - version + padding.
|
|
_op .2byte $version "Version"
|
|
_op .2byte 0 "Padding"
|
|
|
|
# Parse the body.
|
|
variable _debug_names_cus
|
|
set _debug_names_cus []
|
|
proc _debug_names_cu { cu } {
|
|
variable _debug_names_cus
|
|
lappend _debug_names_cus $cu
|
|
}
|
|
variable _debug_names_tus
|
|
set _debug_names_tus []
|
|
proc _debug_names_tu { tu } {
|
|
variable _debug_names_tus
|
|
lappend _debug_names_tus $tu
|
|
}
|
|
variable _debug_names
|
|
set _debug_names []
|
|
proc _debug_names_name { name tag cu hash } {
|
|
variable _debug_names
|
|
declare_labels entry_pool_offset
|
|
lappend _debug_names [list $name $tag $cu $hash $entry_pool_offset]
|
|
}
|
|
with_override Dwarf::cu Dwarf::_debug_names_cu {
|
|
with_override Dwarf::tu Dwarf::_debug_names_tu {
|
|
with_override Dwarf::name Dwarf::_debug_names_name {
|
|
uplevel $body
|
|
}}}
|
|
|
|
# Header - CU / TU / foreign TU count.
|
|
_op .4byte [llength $_debug_names_cus] "Comp_unit_count"
|
|
_op .4byte [llength $_debug_names_tus] "Local_type_unit_count"
|
|
_op .4byte 0 "Foreign_type_unit_count"
|
|
|
|
# Header - bucket count.
|
|
_op .4byte 1 "Bucket_count"
|
|
|
|
# Header - name count.
|
|
_op .4byte [llength $_debug_names] "Name_count"
|
|
|
|
# Header - abbreviation table size.
|
|
declare_labels debug_names_abbrev_table_start \
|
|
debug_names_abbrev_table_end
|
|
set abbrev_table_size \
|
|
"$debug_names_abbrev_table_end - $debug_names_abbrev_table_start"
|
|
_op .4byte $abbrev_table_size "Abbrev_table_size"
|
|
|
|
# Header - augmentation string.
|
|
_op .4byte 8 "Augmentation_string_size"
|
|
_op .ascii [_quote GDB2] "Augmentation_string"
|
|
_op .byte 0
|
|
_op .byte 0
|
|
_op .byte 0
|
|
|
|
# List of CUs.
|
|
set comment "CU offset"
|
|
foreach cu $_debug_names_cus {
|
|
upvar $cu tmp
|
|
if { $is_64 } {
|
|
_op .8byte $tmp $comment
|
|
} else {
|
|
_op .4byte $tmp $comment
|
|
}
|
|
}
|
|
|
|
# List of Local TUs.
|
|
set comment "TU offset"
|
|
foreach tu $_debug_names_tus {
|
|
upvar $tu tmp
|
|
if { $is_64 } {
|
|
_op .8byte $tmp $comment
|
|
} else {
|
|
_op .4byte $tmp $comment
|
|
}
|
|
}
|
|
|
|
# List of Foreign TUs.
|
|
#
|
|
|
|
# Hash Lookup Table - array of buckets.
|
|
_op .4byte 1 "bucket: hash array index 1"
|
|
|
|
# Hash Lookup Table - array of hashes.
|
|
foreach idx $_debug_names {
|
|
set name [lindex $idx 0]
|
|
set hash [lindex $idx 3]
|
|
_op .4byte $hash "hash: $name"
|
|
}
|
|
|
|
# Name Table - array of string offsets.
|
|
foreach idx $_debug_names {
|
|
set name [lindex $idx 0]
|
|
|
|
variable _strings
|
|
if {![info exists _strings($name)]} {
|
|
set _strings($name) [new_label strp]
|
|
_defer_output .debug_str {
|
|
define_label $_strings($name)
|
|
_op .ascii [_quote $name]
|
|
}
|
|
}
|
|
|
|
_op_offset $_debug_names_offset_size $_strings($name) "name: $name"
|
|
}
|
|
|
|
# Name Table - array of entry offsets.
|
|
set base_label ""
|
|
foreach idx $_debug_names {
|
|
set name [lindex $idx 0]
|
|
set label [lindex $idx 4]
|
|
if { [string equal $base_label ""]} {
|
|
set base_label $label
|
|
}
|
|
_op_offset $_debug_names_offset_size "$label - $base_label" \
|
|
"entry pool offset: $name"
|
|
}
|
|
|
|
# Abbreviations Table.
|
|
debug_names_abbrev_table_start:
|
|
set abbrev 1
|
|
variable _constants
|
|
foreach idx $_debug_names {
|
|
set name [lindex $idx 0]
|
|
set tag [lindex $idx 1]
|
|
set cu [lindex $idx 2]
|
|
|
|
if { [regexp "^CU-($decimal)$" $cu dummy cu_index] } {
|
|
set attr_name compile_unit
|
|
set attr_val 1
|
|
} elseif { [regexp "^TU-($decimal)$" $cu dummy cu_index] } {
|
|
set attr_name type_unit
|
|
set attr_val 2
|
|
} else {
|
|
set cu_index [lsearch -exact $_debug_names_cus $cu]
|
|
if { $cu_index == -1 } {
|
|
set attr_name type_unit
|
|
set attr_val 2
|
|
} else {
|
|
set attr_name compile_unit
|
|
set attr_val 1
|
|
}
|
|
}
|
|
|
|
_op .byte $abbrev "abbrev $abbrev"
|
|
_op .uleb128 $_constants(DW_TAG_$tag) "DW_TAG_$tag"
|
|
_op .byte $attr_val "DW_IDX_$attr_name (attribute)"
|
|
_op .byte 0x0f "DW_FORM_udata (form)"
|
|
_op .byte 0 "abbrev terminator (attribute)"
|
|
_op .byte 0 "abbrev terminator (form)"
|
|
incr abbrev
|
|
}
|
|
_op .byte 0 "Abbreviations Table terminator"
|
|
debug_names_abbrev_table_end:
|
|
|
|
# Entry Pool
|
|
set abbrev 1
|
|
foreach idx $_debug_names {
|
|
set name [lindex $idx 0]
|
|
set cu [lindex $idx 2]
|
|
set label [lindex $idx 4]
|
|
|
|
if { [regexp "^CU-($decimal)$" $cu dummy cu_index] } {
|
|
set comment "$name: CU index"
|
|
} elseif { [regexp "^TU-($decimal)$" $cu dummy cu_index] } {
|
|
set comment "$name: TU index"
|
|
} else {
|
|
set cu_index [lsearch -exact $_debug_names_cus $cu]
|
|
if { $cu_index == -1 } {
|
|
set cu_index [lsearch -exact $_debug_names_tus $cu]
|
|
set comment "$name: TU index"
|
|
} else {
|
|
set comment "$name: CU index"
|
|
}
|
|
}
|
|
define_label $label
|
|
_op .byte $abbrev "$name: abbrev"
|
|
_op .uleb128 $cu_index $comment
|
|
_op .byte 0 "$name: terminator"
|
|
incr abbrev
|
|
}
|
|
|
|
# Section end.
|
|
debug_names_end:
|
|
}
|
|
|
|
# The top-level interface to the DWARF assembler.
|
|
# OPTIONS is a list with an even number of elements containing
|
|
# option-name and option-value pairs.
|
|
# Current options are:
|
|
# filename <string>
|
|
# - the name of the file where the generated assembly
|
|
# code is written.
|
|
# default = "".
|
|
# file_id <tcl channel identifier>
|
|
# - open file where the generated assemble core is written.
|
|
# default = "".
|
|
# add_dummy_cus <0|1>
|
|
# - Whether to add dummy CUs before and after the CUs
|
|
# added in the BODY.
|
|
# default = 1.
|
|
# As a special case, if OPTIONS is a list of length 1, it's
|
|
# interpreted as specifing the filename.
|
|
# BODY is Tcl code to emit the assembly. It is evaluated via
|
|
# "eval" -- not uplevel as you might expect, because it is
|
|
# important to run the body in the Dwarf namespace.
|
|
#
|
|
# A typical invocation is something like:
|
|
# Dwarf::assemble $file {
|
|
# cu 0 2 8 {
|
|
# compile_unit {
|
|
# ...
|
|
# }
|
|
# }
|
|
# cu 0 2 8 {
|
|
# ...
|
|
# }
|
|
# }
|
|
proc assemble {options body} {
|
|
variable _initialized
|
|
variable _output_file
|
|
variable _deferred_output
|
|
variable _defer
|
|
variable _label_num
|
|
variable _strings
|
|
variable _cu_count
|
|
variable _line_count
|
|
variable _line_header_end_label
|
|
variable _debug_ranges_64_bit
|
|
variable _debug_addr_index
|
|
|
|
if { [llength $options] == 1 } {
|
|
set options [list filename [lindex $options 0]]
|
|
}
|
|
|
|
parse_options {
|
|
{ filename "" }
|
|
{ file_id "" }
|
|
{ add_dummy_cus 1 }
|
|
}
|
|
|
|
if {!$_initialized} {
|
|
_read_constants
|
|
set _initialized 1
|
|
}
|
|
|
|
if { $file_id != "" } {
|
|
set _output_file $file_id
|
|
} else {
|
|
set _output_file [open $filename w]
|
|
}
|
|
|
|
set _cu_count -1
|
|
_empty_array _deferred_output
|
|
set _defer ""
|
|
set _label_num 0
|
|
_empty_array _strings
|
|
|
|
set _line_count 0
|
|
set _debug_ranges_64_bit [is_64_target]
|
|
|
|
set _debug_addr_index 0
|
|
|
|
# Dummy CU at the start to ensure that the first CU in $body is not
|
|
# the first in .debug_info.
|
|
if { $add_dummy_cus } {
|
|
dummy_cu
|
|
}
|
|
|
|
with_shared_gdb {
|
|
# Not "uplevel" here, because we want to evaluate in this
|
|
# namespace. This is somewhat bad because it means we can't
|
|
# readily refer to outer variables.
|
|
eval $body
|
|
}
|
|
|
|
# Dummy CU at the end to ensure that the last CU in $body is not
|
|
# the last in .debug_info.
|
|
if { $add_dummy_cus } {
|
|
dummy_cu
|
|
}
|
|
|
|
_write_deferred_output
|
|
|
|
_section .note.GNU-stack "" progbits
|
|
|
|
if { $file_id == "" } {
|
|
catch {close $_output_file}
|
|
}
|
|
set _output_file {}
|
|
}
|
|
}
|