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42bcef4ad6
When the DWARF address size is 32-bit, but the host machine is 64-bit,
objdump fails to spot base addresses specified in the .debug_ranges and
.debug_loc lists.
As an example, here is the output when dumping an example .debug_ranges
section with the pre-patched objdump:
Contents of the .debug_ranges section:
Offset Begin End
00000000 ffffffff 00000004 (start > end)
00000000 00000000 00000004
00000000 ffffffff 00000008 (start > end)
00000000 00000000 00000004
00000000 <End of list>
And this is what the same section looks like when dumped with the
patched version of objdump:
Contents of the .debug_ranges section:
Offset Begin End
00000000 ffffffff 00000004 (base address)
00000000 00000004 00000008
00000000 ffffffff 00000008 (base address)
00000000 00000008 0000000c
00000000 <End of list>
binutils/ChangeLog:
* dwarf.c (is_max_address): New function.
(display_loc_list): Remove out of date comment, use
is_max_address.
(display_debug_ranges): Likewise.
binutils/testsuite/ChangeLog:
* binutils-all/objdump.exp: Add test for .debug_ranges decode.
* binutils-all/dw2-ranges.S: New file.
* binutils-all/dw2-ranges.W: New file.
141 lines
4.3 KiB
ArmAsm
141 lines
4.3 KiB
ArmAsm
/* Copyright (C) 2015 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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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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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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/* This tests makes use of the .debug_ranges section, especially,
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making sure that the base address encoding scheme is used. */
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/* Dummy function to provide debug information for. */
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.text
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.globl _start
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_start:
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.4byte 0
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.Lbegin_text1:
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.globl func_cu1
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.type func_cu1, %function
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func_cu1:
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.Lbegin_func_cu1:
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.4byte 0
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.Lend_func_cu1:
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.size func_cu1, .-func_cu1
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.Lend_text1:
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.Lbegin_text2:
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.globl func_cu2
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.type func_cu2, %function
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func_cu2:
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.Lbegin_func_cu2:
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.4byte 0
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.Lend_func_cu2:
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.size func_cu2, .-func_cu2
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.Lend_text2:
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/* Debug information */
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.section .debug_info
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.Lcu1_begin:
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/* CU header */
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.4byte .Lcu1_end - .Lcu1_start /* Length of Compilation Unit */
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.Lcu1_start:
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.2byte 2 /* DWARF Version */
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.4byte .Labbrev1_begin /* Offset into abbrev section */
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.byte 4 /* Pointer size */
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/* CU die */
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.uleb128 1 /* Abbrev: DW_TAG_compile_unit */
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.4byte .Lrange1_begin
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.ascii "file1.c\0" /* DW_AT_name */
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.byte 1 /* DW_AT_language (C) */
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/* func_cu1 */
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.uleb128 2 /* Abbrev: DW_TAG_subprogram */
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.ascii "func_cu1\0" /* DW_AT_name */
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.4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
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.4byte .Lbegin_func_cu1 /* DW_AT_low_pc */
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.4byte .Lend_func_cu1 /* DW_AT_high_pc */
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/* func_cu1 */
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.uleb128 2 /* Abbrev: DW_TAG_subprogram */
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.ascii "func_cu2\0" /* DW_AT_name */
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.4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
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.4byte .Lbegin_func_cu2 /* DW_AT_low_pc */
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.4byte .Lend_func_cu2 /* DW_AT_high_pc */
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.Ltype_int:
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.uleb128 3 /* Abbrev: DW_TAG_base_type */
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.ascii "int\0" /* DW_AT_name */
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.byte 4 /* DW_AT_byte_size */
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.byte 5 /* DW_AT_encoding */
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.byte 0 /* End of children of CU */
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.Lcu1_end:
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.section .debug_ranges
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.Lrange1_begin:
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.4byte 0xffffffff /* base address marker */
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.4byte .Lbegin_text1 /* base address */
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.4byte 0 /* start offset */
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.4byte .Lend_text1 - .Lbegin_text1 /* end offset */
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.4byte 0xffffffff /* base address marker */
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.4byte .Lbegin_text2 /* base address */
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.4byte 0 /* start offset */
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.4byte .Lend_text2 - .Lbegin_text2 /* end offset */
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.4byte 0 /* End marker (Part 1) */
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.4byte 0 /* End marker (Part 2) */
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.section .debug_abbrev
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.Labbrev1_begin:
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.uleb128 1 /* Abbrev code */
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.uleb128 0x11 /* DW_TAG_compile_unit */
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.byte 1 /* has_children */
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.uleb128 0x55 /* DW_AT_ranges */
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.uleb128 0x17 /* DW_FORM_sec_offset */
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.uleb128 0x3 /* DW_AT_name */
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.uleb128 0x8 /* DW_FORM_string */
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.uleb128 0x13 /* DW_AT_language */
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.uleb128 0xb /* DW_FORM_data1 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 2 /* Abbrev code */
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.uleb128 0x2e /* DW_TAG_subprogram */
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.byte 0 /* has_children */
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.uleb128 0x3 /* DW_AT_name */
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.uleb128 0x8 /* DW_FORM_string */
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.uleb128 0x49 /* DW_AT_type */
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.uleb128 0x13 /* DW_FORM_ref4 */
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.uleb128 0x11 /* DW_AT_low_pc */
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.uleb128 0x1 /* DW_FORM_addr */
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.uleb128 0x12 /* DW_AT_high_pc */
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.uleb128 0x1 /* DW_FORM_addr */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 3 /* Abbrev code */
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.uleb128 0x24 /* DW_TAG_base_type */
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.byte 0 /* has_children */
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.uleb128 0x3 /* DW_AT_name */
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.uleb128 0x8 /* DW_FORM_string */
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.uleb128 0xb /* DW_AT_byte_size */
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.uleb128 0xb /* DW_FORM_data1 */
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.uleb128 0x3e /* DW_AT_encoding */
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.uleb128 0xb /* DW_FORM_data1 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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