From: "Mark E." <snowball3 AT bigfoot DOT com>
To: djgpp-workers AT delorie DOT com
Date: Sun, 26 Nov 2000 17:50:34 -0500
MIME-Version: 1.0
Content-type: text/plain; charset=US-ASCII
Content-transfer-encoding: 7BIT
Subject: Re: Binutils 2.10 update #2, garbage alignment problem still present
Message-ID: <3A214D6A.19819.A5202@localhost>
X-mailer: Pegasus Mail for Win32 (v3.12c)
Reply-To: djgpp-workers AT delorie DOT com

> Binutils will probably need some changes. One of the bigger changes will be 
> that binutils know how to set the right alignment for dwarf2 sections. The 

After taking a look at the assembly generated by 'gcc -gdwarf-2', I wonder 
just how important alignment for these sections is. The assembly has no 
alignment directives, so perhaps alignment is that big a deal. However, I 
still believe storing section alignment data is still a good idea.

main.c:
int main()
{
  return 0;
}

	.file	"main.c"
gcc2_compiled.:
___gnu_compiled_c:
	.section	.debug_abbrev
Ldebug_abbrev0:
	.section	.text
Ltext0:
	.section	.debug_info
Ldebug_info0:
	.section	.debug_line
Ldebug_line0:
	.section .text
	.p2align 2
.globl _main
_main:
LFB1:
LM1:

	pushl %ebp
LCFI0:
	movl %esp,%ebp
LCFI1:
LM2:

	xorl %eax,%eax
	jmp L2
LM3:

	.p2align 4,,7
L2:
	movl %ebp,%esp
	popl %ebp
	ret
LFE1:

	.section .eh_frame
___FRAME_BEGIN__:
		.long		LLCIE1
LSCIE1:
		.long		0x0
		.byte	0x1
		.byte	0x0
		.byte	0x1
		.byte	0x7c
		.byte	0x8
		.byte	0xc
		.byte	0x5
		.byte	0x4
		.byte	0x88
		.byte	0x1
	.p2align 2,0
LECIE1:
		.set	LLCIE1,LECIE1-LSCIE1
		.long		LLFDE1
LSFDE1:
		.long		LSFDE1-___FRAME_BEGIN__
		.long		LFB1
		.long		LFE1-LFB1
		.byte	0x4
		.long		LCFI0-LFB1
		.byte	0xe
		.byte	0x8
		.byte	0x84
		.byte	0x2
		.byte	0x4
		.long		LCFI1-LCFI0
		.byte	0xd
		.byte	0x4
	.p2align 2,0
LEFDE1:
		.set	LLFDE1,LEFDE1-LSFDE1

	.section	.text
Letext0:

	.section	.debug_line
		.long		0x42
		.short		0x2
		.long		0x1a
		.byte	0x4
		.byte	0x1
		.byte	-10
		.byte	245
		.byte	10
		.byte	0x0
		.byte	0x1
		.byte	0x1
		.byte	0x1
		.byte	0x1
		.byte	0x0
		.byte	0x0
		.byte	0x0
		.byte	0x1
		.byte	0x0
	.ascii "main.c\0"

		.byte	0x0
		.byte	0x0
		.byte	0x0
		.byte	0x0
		.byte	0x0
		.byte	0x5
		.byte	0x2
		.long		LM1
		.byte	0x15
		.byte	0x0
		.byte	0x5
		.byte	0x2
		.long		LM2
		.byte	0x15
		.byte	0x0
		.byte	0x5
		.byte	0x2
		.long		LM3
		.byte	0x15
		.byte	0x0
		.byte	0x5
		.byte	0x2
		.long		Letext0
		.byte	0x0
		.byte	0x1
		.byte	0x1

	.section	.debug_abbrev
		.byte	0x1
		.byte	0x11
		.byte	0x1
		.byte	0x3
		.byte	0x8
		.byte	0x1b
		.byte	0x8
		.byte	0x25
		.byte	0x8
		.byte	0x13
		.byte	0xb
		.byte	0x11
		.byte	0x1
		.byte	0x12
		.byte	0x1
		.byte	0x10
		.byte	0x6
		.byte	0,0
		.byte	0x2
		.byte	0x2e
		.byte	0x0
		.byte	0x3f
		.byte	0xc
		.byte	0x3
		.byte	0x8
		.byte	0x3a
		.byte	0xb
		.byte	0x3b
		.byte	0xb
		.byte	0x49
		.byte	0x13
		.byte	0x11
		.byte	0x1
		.byte	0x12
		.byte	0x1
		.byte	0x40
		.byte	0xa
		.byte	0,0
		.byte	0x3
		.byte	0x24
		.byte	0x0
		.byte	0x3
		.byte	0x8
		.byte	0xb
		.byte	0xb
		.byte	0x3e
		.byte	0xb
		.byte	0,0
		.byte	0

	.section	.debug_info
		.long		0x74
		.short		0x2
		.long		Ldebug_abbrev0
		.byte	0x4
		.byte	0x1
	.ascii "main.c\0"

	.ascii "c:/djgpp/projects/dwarf2\0"

	.ascii "GNU C 2.95.2 19991024 (release)\0"

		.byte	0x1
		.long		Ltext0
		.long		Letext0
		.long		Ldebug_line0
		.byte	0x2
		.byte	0x1
	.ascii "main\0"

		.byte	0x1
		.byte	0x2
		.long		0x70
		.long		LFB1
		.long		LFE1
		.byte	0x1
		.byte	0x54
		.byte	0x3
	.ascii "int\0"

		.byte	0x4
		.byte	0x5
		.byte	0x0

	.section	.debug_pubnames
		.long		0x17
		.short		0x2
		.long		Ldebug_info0
		.long		0x78
		.long		0x59
	.ascii "main\0"

		.long		0x0

	.section	.debug_aranges
		.long		0x1c
		.short		0x2
		.long		Ldebug_info0
		.byte	0x4
		.byte	0x0
		.long		0x4
		.long		Ltext0
		.long		Letext0-Ltext0
		.long		0x0
		.long		0x0