126 lines
4.7 KiB
C
126 lines
4.7 KiB
C
/*
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* DWARF2 debugging format - address range table
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*
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* Copyright (C) 2006-2007 Peter Johnson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <util.h>
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#include <libyasm.h>
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#include "dwarf2-dbgfmt.h"
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static void
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dwarf2_append_arange(yasm_section *debug_aranges, /*@only@*/ yasm_expr *start,
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/*@only@*/ yasm_expr *length, unsigned int sizeof_address)
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{
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yasm_datavalhead dvs;
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yasm_bytecode *bc;
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yasm_dvs_initialize(&dvs);
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yasm_dvs_append(&dvs, yasm_dv_create_expr(start));
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yasm_dvs_append(&dvs, yasm_dv_create_expr(length));
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bc = yasm_bc_create_data(&dvs, sizeof_address, 0, NULL, 0);
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yasm_bc_finalize(bc, yasm_dwarf2__append_bc(debug_aranges, bc));
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yasm_bc_calc_len(bc, NULL, NULL);
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}
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typedef struct dwarf2_aranges_info {
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yasm_section *debug_aranges; /* section to which address ranges go */
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yasm_object *object;
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yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2;
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} dwarf2_aranges_info;
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static int
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dwarf2_generate_aranges_section(yasm_section *sect, /*@null@*/ void *d)
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{
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dwarf2_aranges_info *info = (dwarf2_aranges_info *)d;
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yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2 = info->dbgfmt_dwarf2;
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/*@null@*/ dwarf2_section_data *dsd;
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/*@only@*/ yasm_expr *start, *length;
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dsd = yasm_section_get_data(sect, &yasm_dwarf2__section_data_cb);
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if (!dsd)
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return 0; /* no line data for this section */
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/* Create address range descriptor */
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start = yasm_expr_create_ident(
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yasm_expr_sym(yasm_dwarf2__bc_sym(info->object->symtab,
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yasm_section_bcs_first(sect))), 0);
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length = yasm_expr_create_ident(
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yasm_expr_int(yasm_calc_bc_dist(yasm_section_bcs_first(sect),
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yasm_section_bcs_last(sect))), 0);
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dwarf2_append_arange(info->debug_aranges, start, length,
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dbgfmt_dwarf2->sizeof_address);
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return 0;
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}
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yasm_section *
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yasm_dwarf2__generate_aranges(yasm_object *object, yasm_section *debug_info)
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{
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yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2 = (yasm_dbgfmt_dwarf2 *)object->dbgfmt;
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int new;
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yasm_section *debug_aranges;
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yasm_bytecode *bc;
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dwarf2_head *head;
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dwarf2_aranges_info info;
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debug_aranges =
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yasm_object_get_general(object, ".debug_aranges",
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2*dbgfmt_dwarf2->sizeof_address, 0, 0, &new,
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0);
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/* header */
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head = yasm_dwarf2__add_head(dbgfmt_dwarf2, debug_aranges, debug_info, 1,
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1);
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/* align ranges to 2x address size (range size) */
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bc = yasm_bc_create_align(
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yasm_expr_create_ident(yasm_expr_int(
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yasm_intnum_create_uint(dbgfmt_dwarf2->sizeof_address*2)), 0),
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NULL, NULL, NULL, 0);
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yasm_bc_finalize(bc, yasm_dwarf2__append_bc(debug_aranges, bc));
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yasm_bc_calc_len(bc, NULL, NULL);
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info.debug_aranges = debug_aranges;
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info.object = object;
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info.dbgfmt_dwarf2 = dbgfmt_dwarf2;
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yasm_object_sections_traverse(object, (void *)&info,
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dwarf2_generate_aranges_section);
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/* Terminate with empty address range descriptor */
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dwarf2_append_arange(debug_aranges,
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yasm_expr_create_ident(yasm_expr_int(yasm_intnum_create_uint(0)), 0),
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yasm_expr_create_ident(yasm_expr_int(yasm_intnum_create_uint(0)), 0),
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dbgfmt_dwarf2->sizeof_address);
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/* mark end of aranges information */
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yasm_dwarf2__set_head_end(head, yasm_section_bcs_last(debug_aranges));
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return debug_aranges;
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}
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