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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
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+/* tc-hppa.h -- Header file for the PA
+ Copyright (C) 1989, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
+
+ This file is part of GAS, the GNU Assembler.
+
+ GAS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 1, or (at your option)
+ any later version.
+
+ GAS is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+
+/* HP PA-RISC support was contributed by the Center for Software Science
+ at the University of Utah. */
+
+/* Please refrain from exposing the world to the internals of tc-hppa.c
+ when this file is included. This means only declaring exported functions,
+ (please PARAMize them!) not exporting structures and data items which
+ are used solely within tc-hppa.c, etc.
+
+ Also refrain from adding any more object file dependent code, there is
+ already far too much object file format dependent code in this file.
+ In theory this file should contain only exported functions, structures
+ and data declarations common to all PA assemblers. */
+
+#ifndef _TC_HPPA_H
+#define _TC_HPPA_H
+
+#ifndef TC_HPPA
+#define TC_HPPA 1
+#endif
+
+#define TARGET_BYTES_BIG_ENDIAN 1
+
+#define TARGET_ARCH bfd_arch_hppa
+
+#define WORKING_DOT_WORD
+
+/* FIXME. The lack of a place to put things which are both target cpu
+ and target format dependent makes hacks like this necessary. */
+#ifdef OBJ_ELF
+#include "bfd/elf32-hppa.h"
+#define TARGET_FORMAT "elf32-hppa"
+#endif
+
+#ifdef OBJ_SOM
+#include "bfd/som.h"
+#define TARGET_FORMAT "som"
+#endif
+
+/* FIXME. Why oh why aren't these defined somewhere globally? */
+#ifndef FALSE
+#define FALSE (0)
+#define TRUE (!FALSE)
+#endif
+
+#define ASEC_NULL (asection *)0
+
+/* Labels are not required to have a colon for a suffix. */
+#define LABELS_WITHOUT_COLONS
+
+/* FIXME. This should be static and declared in tc-hppa.c, but
+ pa_define_label gets used outside of tc-hppa.c via tc_frob_label.
+ Should also be PARAMized, but symbolS isn't available here. */
+extern void pa_define_label ();
+
+/* FIXME. Types not available here, so they can't be PARAMized. */
+extern void parse_cons_expression_hppa ();
+extern void cons_fix_new_hppa ();
+extern int hppa_force_relocation ();
+
+/* This gets called before writing the object file to make sure
+ things like entry/exit and proc/procend pairs match. */
+extern void pa_check_eof PARAMS ((void));
+#define tc_frob_file pa_check_eof
+
+#define tc_frob_label(sym) pa_define_label (sym)
+
+/* The PA does not need support for either of these. */
+#define tc_crawl_symbol_chain(headers) {;}
+#define tc_headers_hook(headers) {;}
+
+#define RELOC_EXPANSION_POSSIBLE
+#define MAX_RELOC_EXPANSION 6
+
+/* FIXME. More things which are both HPPA and ELF specific. There is
+ nowhere to put such things. */
+#ifdef OBJ_ELF
+#define elf_tc_final_processing elf_hppa_final_processing
+void elf_hppa_final_processing PARAMS ((void));
+#endif
+
+/* The PA needs to parse field selectors in .byte, etc. */
+
+#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
+ parse_cons_expression_hppa (EXP)
+#define TC_CONS_FIX_NEW cons_fix_new_hppa
+
+/* On the PA, an equal sign often appears as a condition or nullification
+ completer in an instruction. This can be detected by checking the
+ previous character, if the character is a comma, then the equal is
+ being used as part of an instruction. */
+#define TC_EQUAL_IN_INSN(C, PTR) ((C) == ',')
+
+/* Similarly for an exclamation point. It is used in FP comparison
+ instructions and as an end of line marker. When used in an instruction
+ it will always follow a comma. */
+#define TC_EOL_IN_INSN(PTR) (*(PTR) == '!' && (PTR)[-1] == ',')
+
+#define tc_fix_adjustable hppa_fix_adjustable
+
+/* Because of the strange PA calling conventions, it is sometimes
+ necessary to emit a relocation for a call even though it would
+ normally appear safe to handle it completely within GAS. */
+#define TC_FORCE_RELOCATION(FIXP) hppa_force_relocation (FIXP)
+
+#ifdef OBJ_SOM
+/* If a symbol is imported, but never used, then the symbol should
+ *not* end up in the symbol table. Likewise for absolute symbols
+ with local scope. */
+#define tc_frob_symbol(sym,punt) \
+ if ((S_GET_SEGMENT (sym) == &bfd_und_section && sym->sy_used == 0) \
+ || (S_GET_SEGMENT (sym) == &bfd_abs_section \
+ && (sym->bsym->flags & BSF_EXPORT) == 0)) \
+ punt = 1
+
+/* We need to be able to make relocations involving the difference of
+ two symbols. This includes the difference of two symbols when
+ one of them is undefined (this comes up in PIC code generation).
+
+ We don't define DIFF_EXPR_OK because it does the wrong thing if
+ the add symbol is undefined and the sub symbol is a symbol in
+ the same section as the relocation. We also need some way to
+ specialize some code in adjust_reloc_syms. */
+#define UNDEFINED_DIFFERENCE_OK
+#endif
+
+#ifdef OBJ_ELF
+#define tc_frob_symbol(sym,punt) \
+ { \
+ if ((S_GET_SEGMENT (sym) == &bfd_und_section && sym->sy_used == 0) \
+ || (S_GET_SEGMENT (sym) == &bfd_abs_section \
+ && (sym->bsym->flags & BSF_EXPORT) == 0)) \
+ punt = 1; \
+ }
+#endif
+
+#define md_operand(x)
+
+#define TC_FIX_TYPE PTR
+#define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
+
+#endif /* _TC_HPPA_H */