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Message-ID: <44595771.1070907@tensilica.com>
Date: Thu, 04 May 2006 01:23:00 -0000
From: Ross Morley <ross@tensilica.com>
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To: GDB List <gdb@sources.redhat.com>
Subject: Source info in discontiguous hand asm files
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Hello,

gdb 6.1, as 2.15.92.0.2, gcc 3.4.2 per FC3 distro.

GDB fails to display source file and line info for functions in
two different sections in a hand-assembly source file.

A simple test-case that demonstrates the problem follows:

> cat test.S

    .text
.globl foo
foo:
    nop
    
.globl main

#ifdef DIFFERENT_TEXT_SECTION
    .section .text.with.another.name,"ax",@progbits
#endif
main:
    nop


> gcc test.S -Wa,--gdwarf2
> gdb a.out
...
(gdb) b main
Breakpoint 1 at 0x804834f: file test.S, line 13.
(gdb) b foo
Breakpoint 2 at 0x8048347: file test.S, line 5.
(gdb) quit

> gcc test.S -Wa,--gdwarf2 -DDIFFERENT_TEXT_SECTION
> gdb a.out
...
(gdb) b main
Breakpoint 1 at 0x804834f
(gdb) b foo
Breakpoint 2 at 0x8048347
(gdb)


The DWARF .debug_aranges section seems to have enough information
to deal with this, but GDB doesn't use it.

We'd like to find a fix for this. Any enlightenment is appreciated.


Regards,
Ross Morley
Tensilica, Inc.