mirror of
https://github.com/espressif/binutils-gdb.git
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213516ef31
This commit is the result of running the gdb/copyright.py script, which automated the update of the copyright year range for all source files managed by the GDB project to be updated to include year 2023.
3291 lines
86 KiB
Plaintext
3291 lines
86 KiB
Plaintext
# Copyright 2010-2023 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[pid].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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# 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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#
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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,
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# 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.)
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#
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# Each tag procedure is defined like:
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#
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# proc DW_TAG_mumble {{attrs {}} {children {}}} { ... }
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#
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# ATTRS is an optional list of attributes.
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# It is run through 'subst' in the caller's context before processing.
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#
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# 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 }
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#
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# In each case, NAME is the attribute's name.
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# This can either be the full name, like 'DW_AT_name', or a shortened
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# name, like 'name'. These are fully equivalent.
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#
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# Besides DWARF standard attributes, assembler supports 'macro' attribute
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# which will be substituted by one or more standard or macro attributes.
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# supported macro attributes are:
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#
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# - MACRO_AT_range { FUNC }
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# It is substituted by DW_AT_low_pc and DW_AT_high_pc with the start and
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# end address of function FUNC in file $srcdir/$subdir/$srcfile.
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#
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# - MACRO_AT_func { FUNC }
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# It is substituted by DW_AT_name with FUNC and MACRO_AT_range.
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#
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# If FORM is given, it should name a DW_FORM_ constant.
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# This can either be the short form, like 'DW_FORM_addr', or a
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# shortened version, like 'addr'. If the form is given, VALUE
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# is its value; see below. In some cases, additional processing
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# is done; for example, DW_FORM_strp manages the .debug_str
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# section automatically.
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#
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# If FORM is 'SPECIAL_expr', then VALUE is treated as a location
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# expression. The effective form is then DW_FORM_block or DW_FORM_exprloc
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# for DWARF version >= 4, and VALUE is passed to the (internal)
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# '_location' proc to be translated.
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# This proc implements a miniature DW_OP_ assembler.
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#
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# If FORM is not given, it is guessed:
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# * If VALUE starts with the "@" character, the rest of VALUE is
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# looked up as a DWARF constant, and DW_FORM_sdata is used. For
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# example, '@DW_LANG_c89' could be used.
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# * If VALUE starts with the ":" character, then it is a label
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# reference. The rest of VALUE is taken to be the name of a label,
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# and DW_FORM_ref4 is used. See 'new_label' and 'define_label'.
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# * If VALUE starts with the "%" character, then it is a label
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# reference too, but DW_FORM_ref_addr is used.
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# * Otherwise, if the attribute name has a default form (f.i. DW_FORM_addr for
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# DW_AT_low_pc), then that one is used.
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# * Otherwise, an error is reported. Either specify a form explicitly, or
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# add a default for the the attribute name in _default_form.
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#
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# 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_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
|
|
}
|
|
}
|
|
|
|
# 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
|
|
}
|
|
|
|
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 [incr _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 11 "opcode_base"
|
|
|
|
# The standard_opcode_lengths table. The number of arguments
|
|
# for each of the standard opcodes. Generating 10 entries here
|
|
# matches the use of 11 in the opcode_base above. These 10
|
|
# entries match the 9 standard opcodes for DWARF2 plus
|
|
# DW_LNS_prologue_end 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"
|
|
|
|
# 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
|
|
|
|
if { $Dwarf::_line_unit_version >= 5 } {
|
|
return [expr [llength $_line_file_names] - 1]
|
|
} else {
|
|
return [llength $_line_file_names]
|
|
}
|
|
}
|
|
|
|
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 $_line_header_end_label
|
|
}
|
|
|
|
proc program { body } {
|
|
variable _line_header_end_label
|
|
variable _line
|
|
|
|
|
|
set _line 1
|
|
|
|
_line_finalize_header
|
|
|
|
proc DW_LNE_set_address {addr} {
|
|
_op .byte 0
|
|
set start [new_label "set_address_start"]
|
|
set end [new_label "set_address_end"]
|
|
_op .uleb128 "${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
|
|
_op .byte 0
|
|
_op .uleb128 1
|
|
_op .byte 1
|
|
set _line 1
|
|
}
|
|
|
|
proc DW_LNE_user { len opcode } {
|
|
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 {} {
|
|
_op .byte 1
|
|
}
|
|
|
|
proc DW_LNS_negate_stmt {} {
|
|
_op .byte 6
|
|
}
|
|
|
|
proc DW_LNS_set_prologue_end {} {
|
|
_op .byte 0x0a
|
|
}
|
|
|
|
proc DW_LNS_advance_pc {offset} {
|
|
_op .byte 2
|
|
_op .uleb128 ${offset}
|
|
}
|
|
|
|
proc DW_LNS_advance_line {offset} {
|
|
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} {
|
|
_op .byte 4
|
|
_op .sleb128 ${num}
|
|
}
|
|
|
|
uplevel $body
|
|
}
|
|
|
|
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} {
|
|
}
|
|
|
|
# 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 4 "Augmentation_string_size"
|
|
_op .ascii [_quote GDB] "Augmentation_string"
|
|
|
|
# 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 {}
|
|
}
|
|
}
|