A question about setting Location Counter to a new value in ld linker script

[Mason]

On 05/04/2018 09:57, Mason wrote:

> On 05/04/2018 08:07, Hao Lee wrote:
> 
>> I'm confused about the location counter, especially when setting it to
>> a new value in the output section.
>>
>> I write a simple program and a linker script to make my question more
>> clear. The code is as follows: [snip]
>>
>> I can't understand why lable_2 is 0x30. As the LD documentation
>> says[1], if '.' is used inside a section description, it refers to the
>> byte offset from the start of that section, not an absolute address.
>> In the custom_section, '.' is set to 0x20 which is a relative address,
>> so I think label_2 should also be 0x20. However, label_2 is 0x30. (The
>> value of label_3 is reasonable because it's an absolute address.)
>>
>> Could someone please explain why label_2 is 0x30? Thanks!
>>
>> [1] https://sourceware.org/binutils/docs-2.30/ld/Location-Counter.html#Location-Counter
> 
> Hello,
> 
> 'gas' (GNU assembler) and 'ld' (GNU linker) are Binutils tools.
> AFAIU, Binutils and GCC are separate projects -- with GCC producing
> assembly code processed by gas and then ld.
> 
> Thus, you might have better luck asking on the binutils mailing list:
> 
> 	binutils@sourceware.org
> 
> https://sourceware.org/ml/binutils/

Oops, I'm sorry, I had not noticed that you had, in fact, already
posted to the binutils ML.

	https://sourceware.org/ml/binutils/2018-04/msg00021.html

Looks like Alan Modra answered your question.

Regards.