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

[Yao Qi <yao@codesourcery.com>]

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.

-- 
Yao (齐尧)