Hi,
while I investigate some problems I'm having regarding avr debugging,
I noticed that the dwarf 2 / 3 generation gives a warning when I call a
procedure from another unit. Is it a bug or because it's a warning I can
safely ignore it ?
Reading dwarf information with avr-embedded-objdump.exe --dwarf returns
: "avr-embedded-objdump.exe: Warning: Invalid CIE pointer 0x00c80000 in
FDE at 0x000014"
This is the debug frame section ( avr-embedded-objdump.exe
--dwarf=frames dwarf_CIE_FDE_Bug.elf )
"dwarf_CIE_FDE_Bug.elf: file format elf32-avr
Contents of the .debug_frame section:
00000000 0010 ffffffff CIE
Version: 1
Augmentation: ""
Code alignment factor: 1
Data alignment factor: -4
Return address column: 24
DW_CFA_def_cfa: r32 ofs 2
DW_CFA_offset_extended: r36 at cfa+0
DW_CFA_nop
00000014 0000 00c80000 FDE cie=fd39e538 pc=0002..0002"
The test program :
==========CODE=========
program dwarf_CIE_FDE_Bug;
uses
dwarf_CIE_FDE_Bug_used_unit;
begin
dummy;
end.
==========CODE=========
==========CODE=========
unit dwarf_CIE_FDE_Bug_used_unit;
interface
procedure dummy;
implementation
procedure dummy;
begin
end;
end.
==========CODE=========
Compiled with : "ppcrossavr.exe -MObjFPC -Tembedded -Pavr -CpAVR5
-WpATMEGA328p -Xm -gw2 -O1 dwarf_CIE_FDE_Bug.pas"
I'm using fpc trunk on Windows 10 :
"Free Pascal Compiler version 3.3.1
Compiler date : 2021/02/02
Compiler CPU target: avr"
regards,
--
Dimitrios Chr. Ioannidis
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