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Re: Unexpected DW_AT_type for Ada strings on s390x?

From: Eric Botcazou <ebotcazou at adacore dot com>
To: Andreas Arnez <arnez at linux dot vnet dot ibm dot com>
Cc: Joel Brobecker <brobecker at adacore dot com>, gdb at sourceware dot org
Date: Wed, 05 Dec 2012 10:30:40 +0100
Subject: Re: Unexpected DW_AT_type for Ada strings on s390x?
References: <87fw3mhxbb.fsf@linux.vnet.ibm.com> <20121204121036.GK18566@adacore.com> <87r4n4hmzh.fsf@linux.vnet.ibm.com>

> Right, the two-element structure is passed by reference on s390x.  But
> that also applies to the same structure in C/C++.  Nevertheless, with C
> the argument's DW_AT_type reflects the real type and gcc adjusts the
> DW_AT_location instead.

It's passed by invisible reference in C and explicit reference in Ada.

> Thanks.  Eric, do you confirm that it's intentional to adjust the
> DW_AT_type based on ABI?

The ABIs are indeed different so the debug info will be different.

-- 
Eric Botcazou

References:
- Unexpected DW_AT_type for Ada strings on s390x?
  - From: Andreas Arnez
- Re: Unexpected DW_AT_type for Ada strings on s390x?
  - From: Joel Brobecker
- Re: Unexpected DW_AT_type for Ada strings on s390x?
  - From: Andreas Arnez

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