DW_FORM_ref_udata -
DW_FORM_udata -
+ DW_FORM_loclistx -
DW_FORM_rnglistx {
_op .uleb128 $value
}
uplevel $body
}
+ # Emit a DWARF .debug_loclists section.
+ #
+ # The target address size is based on the current target's address size.
+ #
+ # There is one mandatory positional argument, BODY, which must be Tcl code
+ # that emits the content of the section. It is evaluated in the caller's
+ # context.
+ #
+ # The following option can be used:
+ #
+ # - -is-64 true|false: Whether to use 64-bit DWARF instead of 32-bit DWARF.
+ # The default is 32-bit.
+
+ proc loclists { args } {
+ variable _debug_loclists_addr_size
+ variable _debug_loclists_offset_size
+ variable _debug_loclists_is_64_dwarf
+
+ parse_args {{"is-64" "false"}}
+
+ if { [llength $args] != 1 } {
+ error "loclists proc expects one positional argument (body)"
+ }
+
+ lassign $args body
+
+ 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}"
+ }
+
+ # Generate one table (header + offset array + location lists).
+ #
+ # Accepts one position argument, BODY. BODY may call the LIST_
+ # procedure to generate loclists.
+ #
+ # 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.
+
+ proc table { args } {
+ variable _debug_loclists_table_count
+ variable _debug_loclists_addr_size
+ variable _debug_loclists_offset_size
+ variable _debug_loclists_is_64_dwarf
+
+ parse_args {{post-header-label ""}}
+
+ if { [llength $args] != 1 } {
+ error "table proc expects one positional argument (body)"
+ }
+
+ lassign $args body
+
+ # Generate one location list.
+ #
+ # 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 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 $list_label
+
+ # Emit a DW_LLE_start_length entry.
+
+ proc start_length { start length locdesc } {
+ variable _debug_loclists_is_64_dwarf
+ variable _debug_loclists_addr_size
+ variable _debug_loclists_offset_size
+ variable _debug_loclists_table_count
+ variable _debug_loclists_list_count
+ variable _debug_loclists_locdesc_count
+
+ _op .byte 0x08 "DW_LLE_start_length"
+
+ # Start and end of the address range.
+ _op .${_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
+ }
+
+ uplevel $body
+
+ # Emit end of list.
+ _op .byte 0x00 "DW_LLE_end_of_list"
+
+ incr _debug_loclists_list_count
+ }
+
+ # 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 {
+ 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"
+ _op .4byte $_debug_loclists_list_count "offset entry count"
+
+ define_label $post_header_label
+
+ # Define the user post-header label, if provided.
+ if { ${post-header-label} != "" } {
+ define_label ${post-header-label}
+ }
+
+ # Emit the offset array.
+ for {set list_idx 0} {$list_idx < $_debug_loclists_list_count} {incr list_idx} {
+ set list_label [_compute_list_label $list_idx]
+ _op .${_debug_loclists_offset_size}byte "$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
+ }
+
+ uplevel $body
+ }
+
# Emit a DWARF .debug_line unit.
# OPTIONS is a list with an even number of elements containing
# option-name and option-value pairs.
projects / thirdparty / binutils-gdb.git / blobdiff