diff options
Diffstat (limited to 'modules/dbgfmts/dwarf2/dwarf2-aranges.c')
| -rw-r--r-- | modules/dbgfmts/dwarf2/dwarf2-aranges.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/modules/dbgfmts/dwarf2/dwarf2-aranges.c b/modules/dbgfmts/dwarf2/dwarf2-aranges.c new file mode 100644 index 0000000..f398b7f --- /dev/null +++ b/modules/dbgfmts/dwarf2/dwarf2-aranges.c @@ -0,0 +1,125 @@ +/* + * DWARF2 debugging format - address range table + * + * Copyright (C) 2006-2007 Peter Johnson + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include <util.h> + +#include <libyasm.h> + +#include "dwarf2-dbgfmt.h" + + +static void +dwarf2_append_arange(yasm_section *debug_aranges, /*@only@*/ yasm_expr *start, + /*@only@*/ yasm_expr *length, unsigned int sizeof_address) +{ + yasm_datavalhead dvs; + yasm_bytecode *bc; + + yasm_dvs_initialize(&dvs); + yasm_dvs_append(&dvs, yasm_dv_create_expr(start)); + yasm_dvs_append(&dvs, yasm_dv_create_expr(length)); + bc = yasm_bc_create_data(&dvs, sizeof_address, 0, NULL, 0); + yasm_bc_finalize(bc, yasm_dwarf2__append_bc(debug_aranges, bc)); + yasm_bc_calc_len(bc, NULL, NULL); +} + +typedef struct dwarf2_aranges_info { + yasm_section *debug_aranges; /* section to which address ranges go */ + yasm_object *object; + yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2; +} dwarf2_aranges_info; + +static int +dwarf2_generate_aranges_section(yasm_section *sect, /*@null@*/ void *d) +{ + dwarf2_aranges_info *info = (dwarf2_aranges_info *)d; + yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2 = info->dbgfmt_dwarf2; + /*@null@*/ dwarf2_section_data *dsd; + /*@only@*/ yasm_expr *start, *length; + + dsd = yasm_section_get_data(sect, &yasm_dwarf2__section_data_cb); + if (!dsd) + return 0; /* no line data for this section */ + + /* Create address range descriptor */ + start = yasm_expr_create_ident( + yasm_expr_sym(yasm_dwarf2__bc_sym(info->object->symtab, + yasm_section_bcs_first(sect))), 0); + length = yasm_expr_create_ident( + yasm_expr_int(yasm_calc_bc_dist(yasm_section_bcs_first(sect), + yasm_section_bcs_last(sect))), 0); + dwarf2_append_arange(info->debug_aranges, start, length, + dbgfmt_dwarf2->sizeof_address); + + return 0; +} + +yasm_section * +yasm_dwarf2__generate_aranges(yasm_object *object, yasm_section *debug_info) +{ + yasm_dbgfmt_dwarf2 *dbgfmt_dwarf2 = (yasm_dbgfmt_dwarf2 *)object->dbgfmt; + int new; + yasm_section *debug_aranges; + yasm_bytecode *bc; + dwarf2_head *head; + dwarf2_aranges_info info; + + debug_aranges = + yasm_object_get_general(object, ".debug_aranges", + 2*dbgfmt_dwarf2->sizeof_address, 0, 0, &new, + 0); + + /* header */ + head = yasm_dwarf2__add_head(dbgfmt_dwarf2, debug_aranges, debug_info, 1, + 1); + + /* align ranges to 2x address size (range size) */ + bc = yasm_bc_create_align( + yasm_expr_create_ident(yasm_expr_int( + yasm_intnum_create_uint(dbgfmt_dwarf2->sizeof_address*2)), 0), + NULL, NULL, NULL, 0); + yasm_bc_finalize(bc, yasm_dwarf2__append_bc(debug_aranges, bc)); + yasm_bc_calc_len(bc, NULL, NULL); + + info.debug_aranges = debug_aranges; + info.object = object; + info.dbgfmt_dwarf2 = dbgfmt_dwarf2; + + yasm_object_sections_traverse(object, (void *)&info, + dwarf2_generate_aranges_section); + + /* Terminate with empty address range descriptor */ + dwarf2_append_arange(debug_aranges, + yasm_expr_create_ident(yasm_expr_int(yasm_intnum_create_uint(0)), 0), + yasm_expr_create_ident(yasm_expr_int(yasm_intnum_create_uint(0)), 0), + dbgfmt_dwarf2->sizeof_address); + + /* mark end of aranges information */ + yasm_dwarf2__set_head_end(head, yasm_section_bcs_last(debug_aranges)); + + return debug_aranges; +} + |