Re: [PATCH] Fix gdb.dwarf2/dwz.exp for thumb mode

[Yao Qi <yao@codesourcery.com>]

Yao Qi <yao@codesourcery.com> writes:

> On 09/22/2014 09:47 PM, Yao Qi wrote:
>> On 09/15/2014 08:25 PM, Yao Qi wrote:
>>> Subject: [PATCH] Fix gdb.dwarf2/dwz.exp for thumb mode
>>>
>>> We see the fail in gdb.dwarf2/dwz.exp in thumb mode,
>>>
>>> p the_int^M
>>> $2 = 99^M
>>> (gdb) FAIL: gdb.dwarf2/dwz.exp: p the_int
>>>
>>> In thumb mode, the lsb of references to 'main' in the assembly
>>> (produced by dwarf assember) is set, so the generated debug
>>> information is incorrect.
>>>
>>> in this patch, we add a label main_label inside function main.  Linker
>>> doesn't set its lsb in thumb mode, and we can get function main's
>>> address by 'main_label - $main_label_offset'.  This label isn't moved
>>> out of function main in both gcc and clang.
>>>
>>> gdb/testsuite:
>>>
>>> 2014-09-15  Yao Qi  <yao@codesourcery.com>
>>>
>>> 	* gdb.dwarf2/main.c (main): New lable main_label.
>>> 	* gdb.dwarf2/dwz.exp: Get the offset of main_label to main.
>>> 	Return early if $main_label_offset is unknown.  Get address
>>> 	of main by "main_label - $main_label_offset".
>> 
>> Ping.  https://sourceware.org/ml/gdb-patches/2014-09/msg00497.html
>> 
>
> Ping.

Ping.

-- 
Yao (齐尧)