H8 assembler generates incorrect relocation entries.

[Dhananjay R. Deshpande]

Hi,

> -----Original Message-----
> From: Nitin Gupta, Noida [mailto:niting@noida.hcltech.com]
> Sent: Monday, September 02, 2002 10:43 PM
> To: binutils@sources.redhat.com
> Subject: H8 assembler generates incorrect relocation entries.
> 
> 
> Hi,
> 	The references into the .text section 
> 	from the DWARF debug_line and debug_info section
> 	are not correct when starting address is greater then
> 	2 bytes. This happens for target h8300 only.
> 
> Execution Steps:
> 	1.) modified ldscript h8300elf.x so that the start
> 	    address is greater then 2 bytes.
> 	$ diff -c3p
> /home/niting/venkat/gcc_release/h8300-elf/tools/h8300-elf/lib/
> ldscripts/h830
> 0elf.x myh8300elf.x
> 	***
> /home/niting/gcc_release/h8300-elf/tools/h8300-elf/lib/ldscrip
> ts/h8300elf.x
> Thu Aug 29 17:34:57 2002
> 	--- myh8300elf.x  Wed Aug 31 10:56:00 2002
> 	*************** ENTRY(_start)
> 	*** 9,15 ****
> 	  SECTIONS
> 	  {
> 	    /* Read-only sections, merged into text segment: */
> 	!   . = 0x100;
> 	    .interp         : { *(.interp) }
> 	    .hash           : { *(.hash) }
> 	    .dynsym         : { *(.dynsym) }
> 	--- 9,15 ----
> 	  SECTIONS
> 	  {
> 	    /* Read-only sections, merged into text segment: */
> 	!   . = 0x200200;
> 	    .interp         : { *(.interp) }
> 	    .hash           : { *(.hash) }
> 	    .dynsym         : { *(.dynsym) }
> 
> 	2.) Compiled and Linked the Hello World program
> 	     in "C" with this ldscript for target=h8300 (default
> 	     options)
> 	$h8300-elf-gcc -T myh8300elf.x hello.c
> 
> 	3.) Found the the text references from debug_line
> 	     and debug_info only contain lower 16 bits of the
> 	     address. Can be conformed with 
> 	$readelf -wil a.out
> 
> The Problem:
> 	The assembler seems to be the culprit. Because the 
> 	relocation entries generated for reference into text 
> 	section from DWARF sections are of type R_H8_DIR16 
> 	whereas the .text section starting address is 
> 	something greater then 0x200200. 

First let me clear that I am not familiar with all the details of ELF file
format.( and DWARF ).
The H8300 address space is limited to 16 bit ( 0xFFFF highest ).
so all references are 16 bit. This could be the reason that assembler generates
relocation entries of type R_H8_DIR16.

Regards,
Dhananjay

> 
> I'm looking into the problem. Meanwhile sending this to
> seek your opinion.
> 
> Thanks and Best Regards,
> Nitin.
> 
> 
> 
> 	     
>