[Nasm-bugs] [Bug 3392631] nasm generates broken .debug_loc section on ELF32
noreply-nasm at dev.nasm.us
noreply-nasm at dev.nasm.us
Tue Mar 16 04:16:38 PDT 2021
https://bugzilla.nasm.us/show_bug.cgi?id=3392631
mliska at suse.cz changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mliska at suse.cz
--- Comment #3 from mliska at suse.cz ---
(In reply to Chang S. Bae from comment #1)
> It looks like a (partial) regression from this:
>
> commit b2004511dddeefd7c0866a33ceaa5fa1a6ee0510
> Author: H. Peter Anvin <hpa at zytor.com>
> Date: Tue Feb 26 00:02:35 2019 -0800
>
> ELF: handle more than 32,633 sections
>
> But this change seems to be a part of huge changes.
>
>
> Another observation is
>
> Previously, before the commit, NASM generated an image with .debug_loc:
>
> .debug_loc contents:
> 0x00000000:
>
> 0x00000008:
>
> With the proposed change, it produces this:
>
> .debug_loc contents:
> 0x00000000:
>
> Since the cdef_sse.asm is huge, I'm not sure which one is correct. Anyone
> can confirm this?
I can confirm that! I have a simple reproducer:
$ cat cdef.asm
%define ARCH_X86_64 1
%ifndef public_prefix
%endif
%define WIN64 0
%if WIN64 ; Windows x64 ;=================================================
%if vzeroupper_required
%endif
%endif
%macro BRANCH_INSTR 0-*
%endmacro
%if ARCH_X86_64
%macro DUP4 1-*
%endmacro
ret
%endif ; ARCH_X86_64
$ nasm -o cdef.o -f elf64 -F dwarf cdef.asm
$ readelf -SW cdef.o
...
Section Headers:
[Nr] Name Type Address Off Size ES Flg
Lk Inf Al
[11] .debug_loc PROGBITS 0000000000000000 0005c0 000000 00
0 0 1
So the section is really empty.
@hpa: Can you please take a look?
--
You are receiving this mail because:
You are watching all bug changes.
You are on the CC list for the bug.
More information about the Nasm-bugs
mailing list