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The problem with stabs and sign extension
- To: gdb at sources dot redhat dot com
- Subject: The problem with stabs and sign extension
- From: Daniel Jacobowitz <drow at mvista dot com>
- Date: Wed, 8 Aug 2001 14:12:07 -0700
The problem seems, to my inexperienced eye, to be in stabsread.c:
#define INTERNALIZE_SYMBOL(intern, extern, abfd) \
{ \
(intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
(intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
(intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
(intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
}
n_value is a CORE_ADDR. bfd_h_get_32 returns a bfd_vma, without doing sign
extension. For MIPS, we want sign extension to have happened here. Right?
It does if we're reading mdebug in (because ECOFF_SIGNED_32 is defined in
BFD).
On the other hand, I'm sure other targets don't want sign extension here.
How should we handle this?
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer