[PATCH]: Add %page and %addr modifier to gas HC11

[Stephane Carrez]

Hi!

I committed the following patch to:

   - add a %addr(expr) and %page(expr) modifiers for memory bank support.
     %addr() represents the physical address of the symbol within the memory window
     (-> BFD_RELOC_M68HC11_LO16)
     %page() represents the page number where the symbol is defined
     (-> BFD_RELOC_M68HC11_PAGE)

   - fix a bug when assembling:  'leax sym,x' and 'sym' is a symbol defined
     in the same section.  It was treated as a PC-reloc offset but the semantic
     is really the address of 'sym' (this insn does: x := x + sym)

   - make sure the relocs are against their symbols and not the section.
     This is important for linker relaxation and for trampoline generation.
     For the BFD_RELOC_32, this is temporary until I update the bfd reloc part
     (according to Alan recommendation back in october)

Stephane

2003-04-05  Stephane Carrez  <stcarrez@nerim.fr>

	* config/tc-m68hc11.c (M6811_OP_CALL_ADDR): New internal define.
	(M6811_OP_PAGE_ADDR): New internal define.
	(get_operand): New modifier %page and %addr to obtain page and
	address part of a far-function.
	(fixup8): Use BFD_RELOC_M68HC11_PAGE for a %page modifier; don't
	complain on overflow for the BFD_RELOC_M68HC11_PAGE and truncation
	relocs.
	(fixup16): Use BFD_RELOC_M68HC11_LO16 for a %addr modifier.
	(find_opcode): Add comment.
	(md_estimate_size_before_relax): Force relocation of
	STATE_UNDEXED_OFFSET types when the symbol is not absolute.
	(tc_m68hc11_fix_adjustable): Check for BFD_RELOC_M68HC11_LO16
	instead of BFD_RELOC_LO16; temporarily make the BFD_RELOC_32
	on the symbol itself so that DWARF2 strings are merged correctly.
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