* configure.ac (AC_SEARCH_LIBS): Add check for zlib.

	* config.in, configure: Regenerate.
	* dwarf2read.c: Include zlib.h if present.
	Modified *_SECTION macros.
	(section_is_p): New.
	(dwarf2_locate_sections): Use section_is_p instead of strcmp
	(dwarf2_resize_section): New.
	to determine whether a given section has a given name.
	(zlib_decompress_section): New.
	(dwarf2_read_section): Read the compressed section if present
	in the binary.
	* testsuite/gdb.dwarf2/dw2-compressed.S: New file.
	* testsuite/gdb.dwarf2/dw2-compressed.exp: New file.
	* MAINTAINERS: Added myself to section Write After Approval.

2 files changed, 270 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-compressed.S b/gdb/testsuite/gdb.dwarf2/dw2-compressed.S
new file mode 100644
index 0000000..8809f8e
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-compressed.S
@@ -0,0 +1,218 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2008 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* This tests that gdb can read compressed sections.  The contents
+   are the same as dw2-basic.S, but the .debug_abbrev section has been
+   comrpessed using zlib.  */
+
+/* Dummy function to provide debug information for.  */
+
+	.text
+	.globl _start
+_start:
+	.int 0
+.Lbegin_text1:
+	.globl func_cu1
+	.type func_cu1, %function
+func_cu1:
+.Lbegin_func_cu1:
+	.int 0
+.Lend_func_cu1:
+	.size func_cu1, .-func_cu1
+.Lend_text1:
+
+/* Debug information */
+
+	.section .debug_info
+.Lcu1_begin:
+	/* CU header */
+	.4byte	.Lcu1_end - .Lcu1_start		/* Length of Compilation Unit */
+.Lcu1_start:
+	.2byte	2				/* DWARF Version */
+	.4byte	.Labbrev1_begin			/* Offset into abbrev section */
+	.byte	4				/* Pointer size */
+
+	/* CU die */
+	.uleb128 1				/* Abbrev: DW_TAG_compile_unit */
+	.4byte	.Lline1_begin			/* DW_AT_stmt_list */
+	.4byte	.Lend_text1			/* DW_AT_high_pc */
+	.4byte	.Lbegin_text1			/* DW_AT_low_pc */
+	.ascii	"file1.txt\0"			/* DW_AT_name */
+	.ascii	"GNU C 3.3.3\0"			/* DW_AT_producer */
+	.byte	1				/* DW_AT_language (C) */
+
+	/* func_cu1 */
+	.uleb128	2			/* Abbrev: DW_TAG_subprogram */
+	.byte		1			/* DW_AT_external */
+	.byte		1			/* DW_AT_decl_file */
+	.byte		2			/* DW_AT_decl_line */
+	.ascii		"func_cu1\0"		/* DW_AT_name */
+	.4byte		.Ltype_int-.Lcu1_begin	/* DW_AT_type */
+	.4byte		.Lbegin_func_cu1	/* DW_AT_low_pc */
+	.4byte		.Lend_func_cu1		/* DW_AT_high_pc */
+	.byte		1			/* DW_AT_frame_base: length */
+	.byte		0x55			/* DW_AT_frame_base: DW_OP_reg5 */
+
+.Ltype_int:
+	.uleb128	3			/* Abbrev: DW_TAG_base_type */
+	.ascii		"int\0"			/* DW_AT_name */
+	.byte		4			/* DW_AT_byte_size */
+	.byte		5			/* DW_AT_encoding */
+
+	.byte		0			/* End of children of CU */
+
+.Lcu1_end:
+
+/* Line table */
+	.section .debug_line
+.Lline1_begin:
+	.4byte		.Lline1_end - .Lline1_start	/* Initial length */
+.Lline1_start:
+	.2byte		2			/* Version */
+	.4byte		.Lline1_lines - .Lline1_hdr	/* header_length */
+.Lline1_hdr:
+	.byte		1			/* Minimum insn length */
+	.byte		1			/* default_is_stmt */
+	.byte		1			/* line_base */
+ 	.byte		1			/* line_range */
+	.byte		0x10			/* opcode_base */
+
+	/* Standard lengths */
+	.byte		0
+	.byte		1
+	.byte		1
+	.byte		1
+	.byte		1
+	.byte		0
+	.byte		0
+	.byte		0
+	.byte		1
+	.byte		0
+	.byte		0
+	.byte		1
+	.byte		0
+	.byte		0
+	.byte		0
+
+	/* Include directories */
+	.byte		0
+
+	/* File names */
+	.ascii		"file1.txt\0"
+	.uleb128	0
+	.uleb128	0
+	.uleb128	0
+
+	.byte		0
+
+.Lline1_lines:
+	.byte		0	/* DW_LNE_set_address */
+	.uleb128	5
+	.byte		2
+	.4byte		.Lbegin_func_cu1
+
+	.byte		3	/* DW_LNS_advance_line */
+	.sleb128	3	/* ... to 4 */
+
+	.byte		1	/* DW_LNS_copy */
+
+	.byte		1	/* DW_LNS_copy (second time as an end-of-prologue marker) */
+
+	.byte		0	/* DW_LNE_set_address */
+	.uleb128	5
+	.byte		2
+	.4byte		.Lend_func_cu1
+
+	.byte		0	/* DW_LNE_end_of_sequence */
+	.uleb128	1
+	.byte		1
+
+.Lline1_end:
+
+/* Abbrev table -- compressed */
+	.section .zdebug_abbrev
+.Labbrev1_begin:
+	.ascii		"ZLIB"
+	.4byte		0
+	.2byte		0
+	.byte		0
+	.byte		51
+	.byte		0x78
+	.byte		0x5e
+	.byte		0x63
+	.byte		0x14
+	.byte		0x64
+	.byte		0x14
+	.byte		0x60
+	.byte		0x13
+	.byte		0x62
+	.byte		0x14
+	.byte		0x64
+	.byte		0x64
+	.byte		0xe6
+	.byte		0x50
+	.byte		0xe5
+	.byte		0x10
+	.byte		0xe6
+	.byte		0x66
+	.byte		0x60
+	.byte		0x60
+	.byte		0xd2
+	.byte		0x63
+	.byte		0xb0
+	.byte		0xe7
+	.byte		0xb1
+	.byte		0xe2
+	.byte		0xb6
+	.byte		0xe6
+	.byte		0x66
+	.byte		0xe6
+	.byte		0xf0
+	.byte		0x14
+	.byte		0x16
+	.byte		0x64
+	.byte		0x14
+	.byte		0x62
+	.byte		0x74
+	.byte		0xe0
+	.byte		0x02
+	.byte		0x00
+	.byte		0x25
+	.byte		0x78
+	.byte		0x02
+	.byte		0x81
+	.byte		0x78
+	.byte		0x9c
+	.byte		0x63
+	.byte		0x60
+	.byte		0x60
+	.byte		0x56
+	.byte		0x61
+	.byte		0x60
+	.byte		0xe6
+	.byte		0xe0
+	.byte		0xe6
+	.byte		0xb6
+	.byte		0xe3
+	.byte		0x66
+	.byte		0x00
+	.byte		0x02
+	.byte		0x00
+	.byte		0x04
+	.byte		0x9c
+	.byte		0x00
+	.byte		0x92
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-compressed.exp b/gdb/testsuite/gdb.dwarf2/dw2-compressed.exp
new file mode 100644
index 0000000..4d6270f
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-compressed.exp
@@ -0,0 +1,52 @@
+# Copyright 2008 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Minimal DWARF-2 unit test
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+# For now pick a sampling of likely targets.
+if {![istarget *-*-linux*]
+    && ![istarget *-*-gnu*]
+    && ![istarget *-*-elf*]
+    && ![istarget *-*-openbsd*]
+    && ![istarget arm-*-eabi*]
+    && ![istarget powerpc-*-eabi*]} {
+    return 0  
+}
+
+set testfile "dw2-compressed"
+set srcfile ${testfile}.S
+set binfile ${objdir}/${subdir}/${testfile}.x
+
+if  { [gdb_compile "${srcdir}/${subdir}/main.c" "main-ndebug.o" object -g0] != "" } {
+    return -1
+}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${testfile}.o" object {nodebug}] != "" } {
+    return -1
+}
+
+if  { [gdb_compile "${testfile}.o main-ndebug.o -static -nostdlib" "${binfile}" executable {debug}] != "" } {
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+gdb_test "set listsize 1" ""
+gdb_test "list func_cu1" "4\[ \t\]+File 1 Line 4"
+gdb_test "ptype func_cu1" "type = int \\(\\)"