mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-26 21:40:38 +00:00
9de8d8f184
creation logic from obj_elf_create_section.
* config/obj-elf.c (elf_pseudo_tab): Add pushsection/popsection.
(section_stack): New.
(special_sections): Make const.
(obj_elf_section): Gut and rewrite parsing.
(obj_elf_change_section): New function broken out of obj_elf_section.
(obj_elf_parse_section_letters): Likewise.
(obj_elf_section_word): Likewise.
(obj_elf_section_type): Likewise.
(obj_elf_previous): Treat as a toggle.
(obj_elf_popsection): New.
* config/tc-ppc.c (ppc_section_word): Take str+len not ptr_str.
(ppc_section_type): Likewise.
* config/tc-ppc.h: Likewise.
* expr.h (struct expressionS): Don't make X_op a bitfield.
* config/tc-alpha.c: Update for symbol handling changes.
(md_apply_fix) [case GPREL]: Use now_seg instead of absolute_section.
(load_expression, emit_ir_load, emit_loadstore, emit_jsrjmp): Likewise.
277 lines
9.2 KiB
C
277 lines
9.2 KiB
C
/* tc-ppc.h -- Header file for tc-ppc.c.
|
||
Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
|
||
Written by Ian Lance Taylor, Cygnus Support.
|
||
|
||
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 2, 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. */
|
||
|
||
#define TC_PPC
|
||
|
||
#ifdef ANSI_PROTOTYPES
|
||
struct fix;
|
||
#endif
|
||
|
||
/* Set the endianness we are using. Default to big endian. */
|
||
#ifndef TARGET_BYTES_BIG_ENDIAN
|
||
#define TARGET_BYTES_BIG_ENDIAN 1
|
||
#endif
|
||
|
||
#ifndef BFD_ASSEMBLER
|
||
#error PowerPC support requires BFD_ASSEMBLER
|
||
#endif
|
||
|
||
/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
|
||
XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
|
||
COFF for Windows NT. */
|
||
|
||
#ifdef OBJ_COFF
|
||
#ifndef TE_PE
|
||
#define OBJ_XCOFF
|
||
#endif
|
||
#endif
|
||
|
||
/* The target BFD architecture. */
|
||
#define TARGET_ARCH (ppc_arch ())
|
||
extern enum bfd_architecture ppc_arch PARAMS ((void));
|
||
|
||
/* Whether or not the target is big endian */
|
||
extern int target_big_endian;
|
||
|
||
/* The target BFD format. */
|
||
#ifdef OBJ_COFF
|
||
#ifdef TE_PE
|
||
#define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle")
|
||
#else
|
||
#define TARGET_FORMAT "aixcoff-rs6000"
|
||
#endif
|
||
#endif
|
||
|
||
/* PowerMac has a BFD slightly different from AIX's. */
|
||
#ifdef TE_POWERMAC
|
||
#ifdef TARGET_FORMAT
|
||
#undef TARGET_FORMAT
|
||
#endif
|
||
#define TARGET_FORMAT "xcoff-powermac"
|
||
#endif
|
||
|
||
#ifdef OBJ_ELF
|
||
#define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle")
|
||
#endif
|
||
|
||
/* Permit temporary numeric labels. */
|
||
#define LOCAL_LABELS_FB 1
|
||
|
||
/* $ is used to refer to the current location. */
|
||
#define DOLLAR_DOT
|
||
|
||
/* Strings do not use backslash escapes under COFF. */
|
||
#ifdef OBJ_COFF
|
||
#define NO_STRING_ESCAPES
|
||
#endif
|
||
|
||
#ifdef OBJ_ELF
|
||
#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
|
||
#endif
|
||
|
||
#if TARGET_BYTES_BIG_ENDIAN
|
||
#define PPC_BIG_ENDIAN 1
|
||
#else
|
||
#define PPC_BIG_ENDIAN 0
|
||
#endif
|
||
|
||
/* We don't need to handle .word strangely. */
|
||
#define WORKING_DOT_WORD
|
||
|
||
/* We set the fx_done field appropriately in md_apply_fix. */
|
||
#define TC_HANDLES_FX_DONE
|
||
|
||
#ifdef TE_PE
|
||
|
||
/* Question marks are permitted in symbol names. */
|
||
#define LEX_QM 1
|
||
|
||
/* Don't adjust TOC relocs. */
|
||
#define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp)
|
||
extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
|
||
|
||
#endif
|
||
|
||
#ifdef OBJ_XCOFF
|
||
|
||
/* Declarations needed when generating XCOFF code. XCOFF is an
|
||
extension of COFF, used only on the RS/6000. Rather than create an
|
||
obj-xcoff, we just use obj-coff, and handle the extensions here in
|
||
tc-ppc. */
|
||
|
||
/* We need to keep some information for symbols. */
|
||
struct ppc_tc_sy
|
||
{
|
||
/* We keep a few linked lists of symbols. */
|
||
symbolS *next;
|
||
/* Non-zero if the symbol should be output. The RS/6000 assembler
|
||
only outputs symbols that are external or are mentioned in a
|
||
.globl or .lglobl statement. */
|
||
int output;
|
||
/* The symbol class. */
|
||
int class;
|
||
/* The real name, if the symbol was renamed. */
|
||
char *real_name;
|
||
/* For a csect symbol, the subsegment we are using. This is zero
|
||
for symbols that are not csects. */
|
||
subsegT subseg;
|
||
/* For a csect or common symbol, the alignment to use. */
|
||
int align;
|
||
/* For a function symbol, a symbol whose value is the size. The
|
||
field is NULL if there is no size. */
|
||
symbolS *size;
|
||
/* For a csect symbol, the last symbol which has been defined in
|
||
this csect, or NULL if none have been defined so far. For a .bs
|
||
symbol, the referenced csect symbol. */
|
||
symbolS *within;
|
||
};
|
||
|
||
#define TC_SYMFIELD_TYPE struct ppc_tc_sy
|
||
|
||
/* We need an additional auxent for function symbols. */
|
||
#define OBJ_COFF_MAX_AUXENTRIES 2
|
||
|
||
/* Square and curly brackets are permitted in symbol names. */
|
||
#define LEX_BR 3
|
||
|
||
/* Canonicalize the symbol name. */
|
||
#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
|
||
extern char *ppc_canonicalize_symbol_name PARAMS ((char *));
|
||
|
||
/* Get the symbol class from the name. */
|
||
#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
|
||
extern void ppc_symbol_new_hook PARAMS ((symbolS *));
|
||
|
||
/* Set the symbol class of a label based on the csect. */
|
||
#define tc_frob_label(sym) ppc_frob_label (sym)
|
||
extern void ppc_frob_label PARAMS ((symbolS *));
|
||
|
||
/* TOC relocs requires special handling. */
|
||
#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
|
||
extern int ppc_fix_adjustable PARAMS ((struct fix *));
|
||
|
||
/* A relocation from one csect to another must be kept. */
|
||
#define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP)
|
||
extern int ppc_force_relocation PARAMS ((struct fix *));
|
||
|
||
/* We need to set the section VMA. */
|
||
#define tc_frob_section(sec) ppc_frob_section (sec)
|
||
extern void ppc_frob_section PARAMS ((asection *));
|
||
|
||
/* Finish up the symbol. */
|
||
#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
|
||
extern int ppc_frob_symbol PARAMS ((symbolS *));
|
||
|
||
/* Finish up the entire symtab. */
|
||
#define tc_adjust_symtab() ppc_adjust_symtab ()
|
||
extern void ppc_adjust_symtab PARAMS ((void));
|
||
|
||
/* Niclas Andersson <nican@ida.liu.se> says this is needed. */
|
||
#define SUB_SEGMENT_ALIGN(SEG) 2
|
||
|
||
#endif /* OBJ_XCOFF */
|
||
|
||
#ifdef OBJ_ELF
|
||
|
||
/* Branch prediction relocations must force relocation, as must
|
||
the vtable description relocs. */
|
||
#define TC_FORCE_RELOCATION(FIXP) \
|
||
((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \
|
||
|| (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \
|
||
|| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \
|
||
|| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \
|
||
|| (FIXP)->fx_r_type == BFD_RELOC_VTABLE_INHERIT \
|
||
|| (FIXP)->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
|
||
|
||
#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
|
||
(TC_FORCE_RELOCATION (FIXP) \
|
||
|| ((FIXP)->fx_addsy && !(FIXP)->fx_subsy \
|
||
&& S_GET_SEGMENT ((FIXP)->fx_addsy) != SEC))
|
||
|
||
/* Support for SHF_EXCLUDE and SHT_ORDERED */
|
||
extern int ppc_section_letter PARAMS ((int, char **));
|
||
extern int ppc_section_type PARAMS ((char *, size_t));
|
||
extern int ppc_section_word PARAMS ((char *, size_t));
|
||
extern int ppc_section_flags PARAMS ((int, int, int));
|
||
|
||
#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
|
||
#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
|
||
#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
|
||
#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
|
||
|
||
/* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a
|
||
normal section, and not a bss section so that the linker doesn't crater
|
||
when trying to make more than 2 sections. */
|
||
#define ELF_TC_SPECIAL_SECTIONS \
|
||
{ ".tags", SHT_ORDERED, SHF_ALLOC }, \
|
||
{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \
|
||
{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \
|
||
{ ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \
|
||
{ ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \
|
||
{ ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \
|
||
{ ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC },
|
||
|
||
#define tc_comment_chars ppc_comment_chars
|
||
extern const char *ppc_comment_chars;
|
||
|
||
/* Keep relocations relative to the GOT, or non-PC relative. */
|
||
#define tc_fix_adjustable(FIX) \
|
||
((FIX)->fx_r_type != BFD_RELOC_16_GOTOFF \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_LO16_GOTOFF \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_HI16_GOTOFF \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_HI16_S_GOTOFF \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_GPREL16 \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \
|
||
&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \
|
||
&& ! S_IS_EXTERNAL ((FIX)->fx_addsy) \
|
||
&& ! S_IS_WEAK ((FIX)->fx_addsy) \
|
||
&& ((FIX)->fx_pcrel \
|
||
|| ((FIX)->fx_subsy != NULL \
|
||
&& (S_GET_SEGMENT ((FIX)->fx_subsy) \
|
||
== S_GET_SEGMENT ((FIX)->fx_addsy))) \
|
||
|| strchr (S_GET_NAME ((FIX)->fx_addsy), '\001') != NULL \
|
||
|| strchr (S_GET_NAME ((FIX)->fx_addsy), '\002') != NULL))
|
||
|
||
/* We must never ever try to resolve references to externally visible
|
||
symbols in the assembler, because the .o file might go into a shared
|
||
library, and some other shared library might override that symbol. */
|
||
#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
|
||
((FIX)->fx_addsy == NULL \
|
||
|| (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
|
||
&& ! S_IS_WEAK ((FIX)->fx_addsy) \
|
||
&& S_IS_DEFINED ((FIX)->fx_addsy) \
|
||
&& ! S_IS_COMMON ((FIX)->fx_addsy)))
|
||
|
||
#endif /* OBJ_ELF */
|
||
|
||
/* call md_apply_fix3 with segment instead of md_apply_fix */
|
||
#define MD_APPLY_FIX3
|
||
|
||
/* call md_pcrel_from_section, not md_pcrel_from */
|
||
#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
|
||
extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
|
||
|
||
#define md_parse_name(name, exp) ppc_parse_name (name, exp)
|
||
extern int ppc_parse_name PARAMS ((const char *, struct expressionS *));
|
||
|
||
#define md_operand(x)
|
||
|