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https://gitlab.com/freepascal.org/fpc/source.git
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1819 lines
68 KiB
ObjectPascal
1819 lines
68 KiB
ObjectPascal
{
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Copyright (c) 1998-2006 by the Free Pascal team
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This unit implements the generic part of the GNU assembler
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(v2.8 or later) writer
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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{ Base unit for writing GNU assembler output.
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}
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unit aggas;
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{$i fpcdefs.inc}
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{ $define DEBUG_AGGAS}
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interface
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uses
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globtype,globals,
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aasmbase,aasmtai,aasmdata,
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assemble;
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type
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TCPUInstrWriter = class;
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{# This is a derived class which is used to write
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GAS styled assembler.
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}
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{ TGNUAssembler }
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TGNUAssembler=class(texternalassembler)
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protected
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function sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;virtual;
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function sectionattrs_coff(atype:TAsmSectiontype):string;virtual;
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function sectionalignment_aix(atype:TAsmSectiontype;secalign: byte):string;
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procedure WriteSection(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder;secalign:byte);
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procedure WriteExtraHeader;virtual;
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procedure WriteExtraFooter;virtual;
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procedure WriteInstruction(hp: tai);
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procedure WriteWeakSymbolRef(s: tasmsymbol); virtual;
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procedure WriteAixStringConst(hp: tai_string);
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procedure WriteAixIntConst(hp: tai_const);
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procedure WriteUnalignedIntConst(hp: tai_const);
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procedure WriteDirectiveName(dir: TAsmDirective); virtual;
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public
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function MakeCmdLine: TCmdStr; override;
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procedure WriteTree(p:TAsmList);override;
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procedure WriteAsmList;override;
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destructor destroy; override;
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private
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setcount: longint;
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procedure WriteDecodedSleb128(a: int64);
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procedure WriteDecodedUleb128(a: qword);
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function NextSetLabel: string;
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protected
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InstrWriter: TCPUInstrWriter;
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end;
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{# This is the base class for writing instructions.
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The WriteInstruction() method must be overridden
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to write a single instruction to the assembler
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file.
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}
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TCPUInstrWriter = class
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constructor create(_owner: TGNUAssembler);
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procedure WriteInstruction(hp : tai); virtual; abstract;
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protected
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owner: TGNUAssembler;
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end;
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{ TAppleGNUAssembler }
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TAppleGNUAssembler=class(TGNUAssembler)
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protected
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function sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;override;
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procedure WriteWeakSymbolRef(s: tasmsymbol); override;
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procedure WriteDirectiveName(dir: TAsmDirective); override;
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end;
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TAoutGNUAssembler=class(TGNUAssembler)
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function sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;override;
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end;
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implementation
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uses
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SysUtils,
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cutils,cfileutl,systems,
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fmodule,verbose,
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{$ifndef DISABLE_WIN64_SEH}
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itcpugas,
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{$endif DISABLE_WIN64_SEH}
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{$ifdef m68k}
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cpuinfo,aasmcpu,
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{$endif m68k}
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cpubase,objcasm;
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const
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line_length = 70;
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var
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symendcount : longint;
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{****************************************************************************}
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{ Support routines }
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{****************************************************************************}
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const
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ait_const2str : array[aitconst_128bit..aitconst_64bit_unaligned] of string[20]=(
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#9'.fixme128'#9,#9'.quad'#9,#9'.long'#9,#9'.short'#9,#9'.byte'#9,
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#9'.sleb128'#9,#9'.uleb128'#9,
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#9'.rva'#9,#9'.secrel32'#9,#9'.quad'#9,#9'.long'#9,#9'.short'#9,#9'.short'#9,
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#9'.short'#9,#9'.long'#9,#9'.quad'#9
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);
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ait_solaris_const2str : array[aitconst_128bit..aitconst_64bit_unaligned] of string[20]=(
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#9'.fixme128'#9,#9'.8byte'#9,#9'.4byte'#9,#9'.2byte'#9,#9'.byte'#9,
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#9'.sleb128'#9,#9'.uleb128'#9,
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#9'.rva'#9,#9'.secrel32'#9,#9'.8byte'#9,#9'.4byte'#9,#9'.2byte'#9,#9'.2byte'#9,
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#9'.2byte'#9,#9'.4byte'#9,#9'.8byte'#9
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);
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ait_unaligned_consts = [aitconst_16bit_unaligned..aitconst_64bit_unaligned];
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{ Sparc type of unaligned pseudo-instructions }
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use_ua_sparc_systems = [system_sparc_linux];
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ait_ua_sparc_const2str : array[aitconst_16bit_unaligned..aitconst_64bit_unaligned]
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of string[20]=(
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#9'.uahalf'#9,#9'.uaword'#9,#9'.uaxword'#9
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);
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{ Generic unaligned pseudo-instructions, seems ELF specific }
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use_ua_elf_systems = [system_mipsel_linux,system_mipseb_linux,system_mipsel_android,system_mipsel_embedded,system_mipseb_embedded];
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ait_ua_elf_const2str : array[aitconst_16bit_unaligned..aitconst_64bit_unaligned]
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of string[20]=(
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#9'.2byte'#9,#9'.4byte'#9,#9'.8byte'#9
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);
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{****************************************************************************}
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{ GNU Assembler writer }
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{****************************************************************************}
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destructor TGNUAssembler.Destroy;
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begin
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InstrWriter.free;
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inherited destroy;
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end;
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function TGNUAssembler.MakeCmdLine: TCmdStr;
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begin
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result := inherited MakeCmdLine;
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// MWE: disabled again. It generates dwarf info for the generated .s
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// files as well. This conflicts with the info we generate
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// if target_dbg.id = dbg_dwarf then
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// result := result + ' --gdwarf-2';
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end;
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function TGNUAssembler.NextSetLabel: string;
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begin
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inc(setcount);
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result := asminfo^.labelprefix+'$set$'+tostr(setcount);
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end;
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function is_smart_section(atype:TAsmSectiontype):boolean;
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begin
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{ For bss we need to set some flags that are target dependent,
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it is easier to disable it for smartlinking. It doesn't take up
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filespace }
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result:=not(target_info.system in systems_darwin) and
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create_smartlink_sections and
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(atype<>sec_toc) and
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(atype<>sec_user) and
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{ on embedded systems every byte counts, so smartlink bss too }
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((atype<>sec_bss) or (target_info.system in systems_embedded));
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end;
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function TGNUAssembler.sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;
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const
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secnames : array[TAsmSectiontype] of string[length('__DATA, __datacoal_nt,coalesced')] = ('','',
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'.text',
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'.data',
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{ why doesn't .rodata work? (FK) }
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{ sometimes we have to create a data.rel.ro instead of .rodata, e.g. for }
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{ vtables (and anything else containing relocations), otherwise those are }
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{ not relocated properly on e.g. linux/ppc64. g++ generates there for a }
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{ vtable for a class called Window: }
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{ .section .data.rel.ro._ZTV6Window,"awG",@progbits,_ZTV6Window,comdat }
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{ TODO: .data.ro not yet working}
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{$if defined(arm) or defined(powerpc)}
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'.rodata',
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{$else arm}
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'.data',
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{$endif arm}
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{$if defined(m68k)} { Amiga/m68k GNU AS doesn't seem to like .rodata (KB) }
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'.data',
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{$else}
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'.rodata',
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{$endif}
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'.bss',
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'.threadvar',
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'.pdata',
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'', { stubs }
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'__DATA,__nl_symbol_ptr',
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'__DATA,__la_symbol_ptr',
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'__DATA,__mod_init_func',
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'__DATA,__mod_term_func',
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'.stab',
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'.stabstr',
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'.idata$2','.idata$4','.idata$5','.idata$6','.idata$7','.edata',
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'.eh_frame',
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'.debug_frame','.debug_info','.debug_line','.debug_abbrev','.debug_aranges','.debug_ranges',
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'.fpc',
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'.toc',
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'.init',
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'.fini',
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'.objc_class',
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'.objc_meta_class',
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'.objc_cat_cls_meth',
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'.objc_cat_inst_meth',
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'.objc_protocol',
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'.objc_string_object',
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'.objc_cls_meth',
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'.objc_inst_meth',
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'.objc_cls_refs',
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'.objc_message_refs',
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'.objc_symbols',
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'.objc_category',
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'.objc_class_vars',
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'.objc_instance_vars',
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'.objc_module_info',
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'.objc_class_names',
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'.objc_meth_var_types',
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'.objc_meth_var_names',
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'.objc_selector_strs',
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'.objc_protocol_ext',
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'.objc_class_ext',
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'.objc_property',
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'.objc_image_info',
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'.objc_cstring_object',
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'.objc_sel_fixup',
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'__DATA,__objc_data',
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'__DATA,__objc_const',
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'.objc_superrefs',
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'__DATA, __datacoal_nt,coalesced',
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'.objc_classlist',
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'.objc_nlclasslist',
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'.objc_catlist',
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'.obcj_nlcatlist',
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'.objc_protolist',
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'.stack',
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'.heap'
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);
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secnames_pic : array[TAsmSectiontype] of string[length('__DATA, __datacoal_nt,coalesced')] = ('','',
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'.text',
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'.data.rel',
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'.data.rel',
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'.data.rel',
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'.bss',
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'.threadvar',
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'.pdata',
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'', { stubs }
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'__DATA,__nl_symbol_ptr',
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'__DATA,__la_symbol_ptr',
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'__DATA,__mod_init_func',
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'__DATA,__mod_term_func',
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'.stab',
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'.stabstr',
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'.idata$2','.idata$4','.idata$5','.idata$6','.idata$7','.edata',
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'.eh_frame',
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'.debug_frame','.debug_info','.debug_line','.debug_abbrev','.debug_aranges','.debug_ranges',
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'.fpc',
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'.toc',
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'.init',
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'.fini',
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'.objc_class',
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'.objc_meta_class',
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'.objc_cat_cls_meth',
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'.objc_cat_inst_meth',
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'.objc_protocol',
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'.objc_string_object',
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'.objc_cls_meth',
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'.objc_inst_meth',
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'.objc_cls_refs',
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'.objc_message_refs',
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'.objc_symbols',
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'.objc_category',
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'.objc_class_vars',
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'.objc_instance_vars',
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'.objc_module_info',
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'.objc_class_names',
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'.objc_meth_var_types',
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'.objc_meth_var_names',
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'.objc_selector_strs',
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'.objc_protocol_ext',
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'.objc_class_ext',
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'.objc_property',
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'.objc_image_info',
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'.objc_cstring_object',
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'.objc_sel_fixup',
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'__DATA, __objc_data',
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'__DATA, __objc_const',
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'.objc_superrefs',
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'__DATA, __datacoal_nt,coalesced',
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'.objc_classlist',
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'.objc_nlclasslist',
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'.objc_catlist',
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'.obcj_nlcatlist',
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'.objc_protolist',
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'.stack',
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'.heap'
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);
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var
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sep : string[3];
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secname : string;
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begin
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if (cs_create_pic in current_settings.moduleswitches) and
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not(target_info.system in systems_darwin) then
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secname:=secnames_pic[atype]
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else
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secname:=secnames[atype];
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{$ifdef m68k}
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{ Amiga/Atari GNU AS doesn't support .section .fpc }
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if (atype=sec_fpc) and (target_info.system in [system_m68k_amiga, system_m68k_atari]) then
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secname:=secnames[sec_data];
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{$endif}
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if (atype=sec_fpc) and (Copy(aname,1,3)='res') then
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begin
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result:=secname+'.'+aname;
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exit;
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end;
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if (atype=sec_threadvar) and
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(target_info.system in (systems_windows+systems_wince)) then
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secname:='.tls';
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{ go32v2 stub only loads .text and .data sections, and allocates space for .bss.
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Thus, data which normally goes into .rodata and .rodata_norel sections must
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end up in .data section }
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if (atype in [sec_rodata,sec_rodata_norel]) and
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(target_info.system=system_i386_go32v2) then
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secname:='.data';
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{ section type user gives the user full controll on the section name }
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if atype=sec_user then
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secname:=aname;
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if is_smart_section(atype) and (aname<>'') then
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begin
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case aorder of
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secorder_begin :
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sep:='.b_';
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secorder_end :
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sep:='.z_';
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else
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sep:='.n_';
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end;
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result:=secname+sep+aname
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end
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else
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result:=secname;
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end;
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|
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function TGNUAssembler.sectionattrs_coff(atype:TAsmSectiontype):string;
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begin
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case atype of
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sec_code, sec_init, sec_fini, sec_stub:
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result:='x';
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{ TODO: must be individual for each section }
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sec_user:
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result:='d';
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sec_data, sec_data_lazy, sec_data_nonlazy, sec_fpc,
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sec_idata2, sec_idata4, sec_idata5, sec_idata6, sec_idata7:
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result:='d';
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{ TODO: these need a fix to become read-only }
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sec_rodata, sec_rodata_norel:
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result:='d';
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sec_bss:
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result:='b';
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{ TODO: Somewhat questionable. FPC does not allow initialized threadvars,
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so no sense to mark it as containing data. But Windows allows it to
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contain data, and Linux even has .tdata and .tbss }
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sec_threadvar:
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result:='b';
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sec_pdata, sec_edata, sec_eh_frame, sec_toc:
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result:='r';
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sec_stab,sec_stabstr,
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sec_debug_frame,sec_debug_info,sec_debug_line,sec_debug_abbrev,sec_debug_aranges,sec_debug_ranges:
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result:='n';
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else
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result:=''; { defaults to data+load }
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end;
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end;
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|
|
|
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function TGNUAssembler.sectionalignment_aix(atype:TAsmSectiontype;secalign: byte): string;
|
|
var
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l: longint;
|
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begin
|
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if (secalign=0) or
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not(atype in [sec_code,sec_bss,sec_rodata_norel,sec_rodata,sec_data]) then
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begin
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result:='';
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exit;
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end;
|
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if not ispowerof2(secalign,l) then
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internalerror(2012022201);
|
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result:=tostr(l);
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end;
|
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|
|
|
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procedure TGNUAssembler.WriteSection(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder;secalign:byte);
|
|
var
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s : string;
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begin
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|
writer.AsmLn;
|
|
case target_info.system of
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|
system_i386_OS2,
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system_i386_EMX,
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system_m68k_atari, { atari tos/mint GNU AS also doesn't seem to like .section (KB) }
|
|
system_m68k_amiga: ; { amiga has old GNU AS (2.14), which blews up from .section (KB) }
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|
system_powerpc_darwin,
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|
system_i386_darwin,
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|
system_i386_iphonesim,
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|
system_powerpc64_darwin,
|
|
system_x86_64_darwin,
|
|
system_arm_darwin,
|
|
system_aarch64_darwin,
|
|
system_x86_64_iphonesim,
|
|
system_powerpc_aix,
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|
system_powerpc64_aix:
|
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begin
|
|
if (atype in [sec_stub]) then
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writer.AsmWrite('.section ');
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end
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else
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writer.AsmWrite('.section ');
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end;
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s:=sectionname(atype,aname,aorder);
|
|
writer.AsmWrite(s);
|
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case atype of
|
|
sec_fpc :
|
|
if aname = 'resptrs' then
|
|
writer.AsmWrite(', "a", @progbits');
|
|
sec_stub :
|
|
begin
|
|
case target_info.system of
|
|
{ there are processor-independent shortcuts available }
|
|
{ for this, namely .symbol_stub and .picsymbol_stub, but }
|
|
{ they don't work and gcc doesn't use them either... }
|
|
system_powerpc_darwin,
|
|
system_powerpc64_darwin:
|
|
if (cs_create_pic in current_settings.moduleswitches) then
|
|
writer.AsmWriteln('__TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32')
|
|
else
|
|
writer.AsmWriteln('__TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16');
|
|
system_i386_darwin,
|
|
system_i386_iphonesim:
|
|
writer.AsmWriteln('__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5');
|
|
system_arm_darwin:
|
|
if (cs_create_pic in current_settings.moduleswitches) then
|
|
writer.AsmWriteln('__TEXT,__picsymbolstub4,symbol_stubs,none,16')
|
|
else
|
|
writer.AsmWriteln('__TEXT,__symbol_stub4,symbol_stubs,none,12')
|
|
{ darwin/(x86-64/AArch64) uses PC-based GOT addressing, no
|
|
explicit symbol stubs }
|
|
else
|
|
internalerror(2006031101);
|
|
end;
|
|
end;
|
|
else
|
|
{ GNU AS won't recognize '.text.n_something' section name as belonging
|
|
to '.text' and assigns default attributes to it, which is not
|
|
always correct. We have to fix it.
|
|
|
|
TODO: This likely applies to all systems which smartlink without
|
|
creating libraries }
|
|
if (target_info.system in [system_i386_win32,system_x86_64_win64]) and
|
|
is_smart_section(atype) and (aname<>'') then
|
|
begin
|
|
s:=sectionattrs_coff(atype);
|
|
if (s<>'') then
|
|
writer.AsmWrite(',"'+s+'"');
|
|
end
|
|
else if target_info.system in systems_aix then
|
|
begin
|
|
s:=sectionalignment_aix(atype,secalign);
|
|
if s<>'' then
|
|
writer.AsmWrite(','+s);
|
|
end;
|
|
end;
|
|
writer.AsmLn;
|
|
LastSecType:=atype;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteDecodedUleb128(a: qword);
|
|
var
|
|
i,len : longint;
|
|
buf : array[0..63] of byte;
|
|
begin
|
|
len:=EncodeUleb128(a,buf);
|
|
for i:=0 to len-1 do
|
|
begin
|
|
if (i > 0) then
|
|
writer.AsmWrite(',');
|
|
writer.AsmWrite(tostr(buf[i]));
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteDecodedSleb128(a: int64);
|
|
var
|
|
i,len : longint;
|
|
buf : array[0..255] of byte;
|
|
begin
|
|
len:=EncodeSleb128(a,buf);
|
|
for i:=0 to len-1 do
|
|
begin
|
|
if (i > 0) then
|
|
writer.AsmWrite(',');
|
|
writer.AsmWrite(tostr(buf[i]));
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteTree(p:TAsmList);
|
|
|
|
function needsObject(hp : tai_symbol) : boolean;
|
|
begin
|
|
needsObject :=
|
|
(
|
|
assigned(hp.next) and
|
|
(tai(hp.next).typ in [ait_const,ait_datablock,ait_realconst])
|
|
) or
|
|
(hp.sym.typ in [AT_DATA,AT_METADATA]);
|
|
|
|
end;
|
|
|
|
|
|
procedure doalign(alignment: byte; use_op: boolean; fillop: byte; out last_align: longint;lasthp:tai);
|
|
var
|
|
i: longint;
|
|
{$ifdef m68k}
|
|
instr : string;
|
|
{$endif}
|
|
begin
|
|
last_align:=alignment;
|
|
if alignment>1 then
|
|
begin
|
|
if not(target_info.system in (systems_darwin+systems_aix)) then
|
|
begin
|
|
{$ifdef m68k}
|
|
if not use_op and (lastsectype=sec_code) then
|
|
begin
|
|
if not ispowerof2(alignment,i) then
|
|
internalerror(2014022201);
|
|
{ the Coldfire manual suggests the TBF instruction for
|
|
alignments, but somehow QEMU does not interpret that
|
|
correctly... }
|
|
{if current_settings.cputype in cpu_coldfire then
|
|
instr:='0x51fc'
|
|
else}
|
|
instr:='0x4e71';
|
|
writer.AsmWrite(#9'.balignw '+tostr(alignment)+','+instr);
|
|
end
|
|
else
|
|
begin
|
|
{$endif m68k}
|
|
writer.AsmWrite(#9'.balign '+tostr(alignment));
|
|
if use_op then
|
|
writer.AsmWrite(','+tostr(fillop))
|
|
{$ifdef x86}
|
|
{ force NOP as alignment op code }
|
|
else if (LastSecType=sec_code) and (asminfo^.id<>as_solaris_as) then
|
|
writer.AsmWrite(',0x90');
|
|
{$endif x86}
|
|
{$ifdef m68k}
|
|
end;
|
|
{$endif m68k}
|
|
end
|
|
else
|
|
begin
|
|
{ darwin and aix as only support .align }
|
|
if not ispowerof2(alignment,i) then
|
|
internalerror(2003010305);
|
|
writer.AsmWrite(#9'.align '+tostr(i));
|
|
last_align:=i;
|
|
end;
|
|
writer.AsmLn;
|
|
end;
|
|
end;
|
|
|
|
var
|
|
ch : char;
|
|
lasthp,
|
|
hp : tai;
|
|
constdef : taiconst_type;
|
|
s,t : string;
|
|
i,pos,l : longint;
|
|
InlineLevel : cardinal;
|
|
last_align : longint;
|
|
do_line : boolean;
|
|
|
|
sepChar : char;
|
|
replaceforbidden: boolean;
|
|
begin
|
|
if not assigned(p) then
|
|
exit;
|
|
replaceforbidden:=asminfo^.dollarsign<>'$';
|
|
|
|
last_align := 2;
|
|
InlineLevel:=0;
|
|
{ lineinfo is only needed for al_procedures (PFV) }
|
|
do_line:=(cs_asm_source in current_settings.globalswitches) or
|
|
((cs_lineinfo in current_settings.moduleswitches)
|
|
and (p=current_asmdata.asmlists[al_procedures]));
|
|
lasthp:=nil;
|
|
hp:=tai(p.first);
|
|
while assigned(hp) do
|
|
begin
|
|
prefetch(pointer(hp.next)^);
|
|
if not(hp.typ in SkipLineInfo) then
|
|
begin
|
|
current_filepos:=tailineinfo(hp).fileinfo;
|
|
{ no line info for inlined code }
|
|
if do_line and (inlinelevel=0) then
|
|
WriteSourceLine(hp as tailineinfo);
|
|
end;
|
|
|
|
case hp.typ of
|
|
|
|
ait_comment :
|
|
Begin
|
|
writer.AsmWrite(asminfo^.comment);
|
|
writer.AsmWritePChar(tai_comment(hp).str);
|
|
writer.AsmLn;
|
|
End;
|
|
|
|
ait_regalloc :
|
|
begin
|
|
if (cs_asm_regalloc in current_settings.globalswitches) then
|
|
begin
|
|
writer.AsmWrite(#9+asminfo^.comment+'Register ');
|
|
repeat
|
|
writer.AsmWrite(std_regname(Tai_regalloc(hp).reg));
|
|
if (hp.next=nil) or
|
|
(tai(hp.next).typ<>ait_regalloc) or
|
|
(tai_regalloc(hp.next).ratype<>tai_regalloc(hp).ratype) then
|
|
break;
|
|
hp:=tai(hp.next);
|
|
writer.AsmWrite(',');
|
|
until false;
|
|
writer.AsmWrite(' ');
|
|
writer.AsmWriteLn(regallocstr[tai_regalloc(hp).ratype]);
|
|
end;
|
|
end;
|
|
|
|
ait_tempalloc :
|
|
begin
|
|
if (cs_asm_tempalloc in current_settings.globalswitches) then
|
|
WriteTempalloc(tai_tempalloc(hp));
|
|
end;
|
|
|
|
ait_align :
|
|
begin
|
|
doalign(tai_align_abstract(hp).aligntype,tai_align_abstract(hp).use_op,tai_align_abstract(hp).fillop,last_align,lasthp);
|
|
end;
|
|
|
|
ait_section :
|
|
begin
|
|
if tai_section(hp).sectype<>sec_none then
|
|
if replaceforbidden then
|
|
WriteSection(tai_section(hp).sectype,ReplaceForbiddenAsmSymbolChars(tai_section(hp).name^),tai_section(hp).secorder,tai_section(hp).secalign)
|
|
else
|
|
WriteSection(tai_section(hp).sectype,tai_section(hp).name^,tai_section(hp).secorder,tai_section(hp).secalign)
|
|
else
|
|
begin
|
|
{$ifdef EXTDEBUG}
|
|
writer.AsmWrite(asminfo^.comment);
|
|
writer.AsmWriteln(' sec_none');
|
|
{$endif EXTDEBUG}
|
|
end;
|
|
end;
|
|
|
|
ait_datablock :
|
|
begin
|
|
if (target_info.system in systems_darwin) then
|
|
begin
|
|
{ On Mac OS X you can't have common symbols in a shared library
|
|
since those are in the TEXT section and the text section is
|
|
read-only in shared libraries (so it can be shared among different
|
|
processes). The alternate code creates some kind of common symbols
|
|
in the data segment.
|
|
}
|
|
if tai_datablock(hp).is_global then
|
|
begin
|
|
writer.AsmWrite('.globl ');
|
|
writer.AsmWriteln(tai_datablock(hp).sym.name);
|
|
writer.AsmWriteln('.data');
|
|
writer.AsmWrite('.zerofill __DATA, __common, ');
|
|
writer.AsmWrite(tai_datablock(hp).sym.name);
|
|
writer.AsmWriteln(', '+tostr(tai_datablock(hp).size)+','+tostr(last_align));
|
|
if not(LastSecType in [sec_data,sec_none]) then
|
|
writesection(LastSecType,'',secorder_default,1 shl last_align);
|
|
end
|
|
else
|
|
begin
|
|
writer.AsmWrite(#9'.lcomm'#9);
|
|
writer.AsmWrite(tai_datablock(hp).sym.name);
|
|
writer.AsmWrite(','+tostr(tai_datablock(hp).size));
|
|
writer.AsmWrite(','+tostr(last_align));
|
|
writer.AsmLn;
|
|
end;
|
|
end
|
|
else if target_info.system in systems_aix then
|
|
begin
|
|
if tai_datablock(hp).is_global then
|
|
begin
|
|
writer.AsmWrite(#9'.globl ');
|
|
writer.AsmWriteln(ReplaceForbiddenAsmSymbolChars(tai_datablock(hp).sym.name));
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_datablock(hp).sym.name));
|
|
writer.AsmWriteln(':');
|
|
writer.AsmWrite(#9'.space ');
|
|
writer.AsmWriteln(tostr(tai_datablock(hp).size));
|
|
if not(LastSecType in [sec_data,sec_none]) then
|
|
writesection(LastSecType,'',secorder_default,1 shl last_align);
|
|
end
|
|
else
|
|
begin
|
|
writer.AsmWrite(#9'.lcomm ');
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_datablock(hp).sym.name));
|
|
writer.AsmWrite(',');
|
|
writer.AsmWrite(tostr(tai_datablock(hp).size)+',');
|
|
writer.AsmWrite('_data.bss_,');
|
|
writer.AsmWriteln(tostr(last_align));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{$ifdef USE_COMM_IN_BSS}
|
|
if writingpackages then
|
|
begin
|
|
{ The .comm is required for COMMON symbols. These are used
|
|
in the shared library loading. All the symbols declared in
|
|
the .so file need to resolve to the data allocated in the main
|
|
program (PFV) }
|
|
if tai_datablock(hp).is_global then
|
|
begin
|
|
writer.AsmWrite(#9'.comm'#9);
|
|
if replaceforbidden then
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_datablock(hp).sym.name))
|
|
else
|
|
writer.AsmWrite(tai_datablock(hp).sym.name);
|
|
writer.AsmWrite(','+tostr(tai_datablock(hp).size));
|
|
writer.AsmWrite(','+tostr(last_align));
|
|
writer.AsmLn;
|
|
end
|
|
else
|
|
begin
|
|
writer.AsmWrite(#9'.lcomm'#9);
|
|
if replaceforbidden then
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_datablock(hp).sym.name));
|
|
else
|
|
writer.AsmWrite(tai_datablock(hp).sym.name);
|
|
writer.AsmWrite(','+tostr(tai_datablock(hp).size));
|
|
writer.AsmWrite(','+tostr(last_align));
|
|
writer.AsmLn;
|
|
end
|
|
end
|
|
else
|
|
{$endif USE_COMM_IN_BSS}
|
|
begin
|
|
if Tai_datablock(hp).is_global then
|
|
begin
|
|
writer.AsmWrite(#9'.globl ');
|
|
if replaceforbidden then
|
|
writer.AsmWriteln(ReplaceForbiddenAsmSymbolChars(Tai_datablock(hp).sym.name))
|
|
else
|
|
writer.AsmWriteln(Tai_datablock(hp).sym.name);
|
|
end;
|
|
if ((target_info.system <> system_arm_linux) and (target_info.system <> system_arm_android)) then
|
|
sepChar := '@'
|
|
else
|
|
sepChar := '%';
|
|
if replaceforbidden then
|
|
begin
|
|
if (tf_needs_symbol_type in target_info.flags) then
|
|
writer.AsmWriteln(#9'.type '+ReplaceForbiddenAsmSymbolChars(Tai_datablock(hp).sym.name)+','+sepChar+'object');
|
|
if (tf_needs_symbol_size in target_info.flags) and (tai_datablock(hp).size > 0) then
|
|
writer.AsmWriteln(#9'.size '+ReplaceForbiddenAsmSymbolChars(Tai_datablock(hp).sym.name)+','+tostr(Tai_datablock(hp).size));
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(Tai_datablock(hp).sym.name))
|
|
end
|
|
else
|
|
begin
|
|
if (tf_needs_symbol_type in target_info.flags) then
|
|
writer.AsmWriteln(#9'.type '+Tai_datablock(hp).sym.name+','+sepChar+'object');
|
|
if (tf_needs_symbol_size in target_info.flags) and (tai_datablock(hp).size > 0) then
|
|
writer.AsmWriteln(#9'.size '+Tai_datablock(hp).sym.name+','+tostr(Tai_datablock(hp).size));
|
|
writer.AsmWrite(Tai_datablock(hp).sym.name);
|
|
end;
|
|
writer.AsmWriteln(':');
|
|
writer.AsmWriteln(#9'.zero '+tostr(Tai_datablock(hp).size));
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
ait_const:
|
|
begin
|
|
constdef:=tai_const(hp).consttype;
|
|
case constdef of
|
|
{$ifndef cpu64bitaddr}
|
|
aitconst_128bit :
|
|
begin
|
|
internalerror(200404291);
|
|
end;
|
|
|
|
aitconst_64bit :
|
|
begin
|
|
if assigned(tai_const(hp).sym) then
|
|
internalerror(200404292);
|
|
if not(target_info.system in systems_aix) then
|
|
begin
|
|
writer.AsmWrite(ait_const2str[aitconst_32bit]);
|
|
if target_info.endian = endian_little then
|
|
begin
|
|
writer.AsmWrite(tostr(longint(lo(tai_const(hp).value))));
|
|
writer.AsmWrite(',');
|
|
writer.AsmWrite(tostr(longint(hi(tai_const(hp).value))));
|
|
end
|
|
else
|
|
begin
|
|
writer.AsmWrite(tostr(longint(hi(tai_const(hp).value))));
|
|
writer.AsmWrite(',');
|
|
writer.AsmWrite(tostr(longint(lo(tai_const(hp).value))));
|
|
end;
|
|
end
|
|
else
|
|
WriteAixIntConst(tai_const(hp));
|
|
writer.AsmLn;
|
|
end;
|
|
{$endif cpu64bitaddr}
|
|
aitconst_got:
|
|
begin
|
|
if tai_const(hp).symofs<>0 then
|
|
InternalError(2015091401); // No symbol offset is allowed for GOT.
|
|
writer.AsmWrite(#9'.word'#9+tai_const(hp).sym.name+'(GOT)');
|
|
writer.AsmLn;
|
|
end;
|
|
|
|
aitconst_gotoff_symbol:
|
|
begin
|
|
if (tai_const(hp).sym=nil) then
|
|
InternalError(2014022601);
|
|
case target_info.cpu of
|
|
|
|
cpu_mipseb,cpu_mipsel:
|
|
begin
|
|
writer.AsmWrite(#9'.gpword'#9);
|
|
writer.AsmWrite(tai_const(hp).sym.name);
|
|
end;
|
|
|
|
cpu_i386:
|
|
begin
|
|
writer.AsmWrite(ait_const2str[aitconst_32bit]);
|
|
writer.AsmWrite(tai_const(hp).sym.name+'-_GLOBAL_OFFSET_TABLE_');
|
|
end;
|
|
else
|
|
InternalError(2014022602);
|
|
end;
|
|
if (tai_const(hp).value<>0) then
|
|
writer.AsmWrite(tostr_with_plus(tai_const(hp).value));
|
|
writer.AsmLn;
|
|
end;
|
|
|
|
aitconst_uleb128bit,
|
|
aitconst_sleb128bit,
|
|
{$ifdef cpu64bitaddr}
|
|
aitconst_128bit,
|
|
aitconst_64bit,
|
|
{$endif cpu64bitaddr}
|
|
aitconst_32bit,
|
|
aitconst_16bit,
|
|
aitconst_8bit,
|
|
aitconst_rva_symbol,
|
|
aitconst_secrel32_symbol,
|
|
aitconst_darwin_dwarf_delta32,
|
|
aitconst_darwin_dwarf_delta64,
|
|
aitconst_half16bit,
|
|
aitconst_gs,
|
|
aitconst_16bit_unaligned,
|
|
aitconst_32bit_unaligned,
|
|
aitconst_64bit_unaligned:
|
|
begin
|
|
{ the AIX assembler (and for compatibility, the GNU
|
|
assembler when targeting AIX) automatically aligns
|
|
.short/.long/.llong to a multiple of 2/4/8 bytes. We
|
|
don't want that, since this may be data inside a packed
|
|
record -> use .vbyte instead (byte stream of fixed
|
|
length) }
|
|
if (target_info.system in systems_aix) and
|
|
(constdef in [aitconst_128bit,aitconst_64bit,aitconst_32bit,aitconst_16bit]) and
|
|
not assigned(tai_const(hp).sym) then
|
|
begin
|
|
WriteAixIntConst(tai_const(hp));
|
|
end
|
|
else if (target_info.system in systems_darwin) and
|
|
(constdef in [aitconst_uleb128bit,aitconst_sleb128bit]) then
|
|
begin
|
|
writer.AsmWrite(ait_const2str[aitconst_8bit]);
|
|
case tai_const(hp).consttype of
|
|
aitconst_uleb128bit:
|
|
WriteDecodedUleb128(qword(tai_const(hp).value));
|
|
aitconst_sleb128bit:
|
|
WriteDecodedSleb128(int64(tai_const(hp).value));
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if (constdef in ait_unaligned_consts) and
|
|
(target_info.system in use_ua_sparc_systems) then
|
|
writer.AsmWrite(ait_ua_sparc_const2str[constdef])
|
|
else if (constdef in ait_unaligned_consts) and
|
|
(target_info.system in use_ua_elf_systems) then
|
|
writer.AsmWrite(ait_ua_elf_const2str[constdef])
|
|
{ we can also have unaligned pointers in packed record
|
|
constants, which don't get translated into
|
|
unaligned tai -> always use vbyte }
|
|
else if target_info.system in systems_aix then
|
|
writer.AsmWrite(#9'.vbyte'#9+tostr(tai_const(hp).size)+',')
|
|
else if (asminfo^.id=as_solaris_as) then
|
|
writer.AsmWrite(ait_solaris_const2str[constdef])
|
|
else
|
|
writer.AsmWrite(ait_const2str[constdef]);
|
|
l:=0;
|
|
t := '';
|
|
repeat
|
|
if assigned(tai_const(hp).sym) then
|
|
begin
|
|
if assigned(tai_const(hp).endsym) then
|
|
begin
|
|
if (constdef in [aitconst_darwin_dwarf_delta32,aitconst_darwin_dwarf_delta64]) then
|
|
begin
|
|
s := NextSetLabel;
|
|
t := #9'.set '+s+','+tai_const(hp).endsym.name+'-'+tai_const(hp).sym.name;
|
|
end
|
|
else
|
|
s:=tai_const(hp).endsym.name+'-'+tai_const(hp).sym.name
|
|
end
|
|
else
|
|
s:=tai_const(hp).sym.name;
|
|
if replaceforbidden then
|
|
s:=ReplaceForbiddenAsmSymbolChars(s);
|
|
if tai_const(hp).value<>0 then
|
|
s:=s+tostr_with_plus(tai_const(hp).value);
|
|
end
|
|
else
|
|
{$ifdef cpu64bitaddr}
|
|
s:=tostr(tai_const(hp).value);
|
|
{$else cpu64bitaddr}
|
|
{ 64 bit constants are already handled above in this case }
|
|
s:=tostr(longint(tai_const(hp).value));
|
|
{$endif cpu64bitaddr}
|
|
if constdef = aitconst_half16bit then
|
|
s:='('+s+')/2';
|
|
if constdef = aitconst_gs then
|
|
s:='gs('+s+')';
|
|
|
|
writer.AsmWrite(s);
|
|
inc(l,length(s));
|
|
{ Values with symbols are written on a single line to improve
|
|
reading of the .s file (PFV) }
|
|
if assigned(tai_const(hp).sym) or
|
|
not(LastSecType in [sec_data,sec_rodata,sec_rodata_norel]) or
|
|
(l>line_length) or
|
|
(hp.next=nil) or
|
|
(tai(hp.next).typ<>ait_const) or
|
|
(tai_const(hp.next).consttype<>constdef) or
|
|
assigned(tai_const(hp.next).sym) then
|
|
break;
|
|
hp:=tai(hp.next);
|
|
writer.AsmWrite(',');
|
|
until false;
|
|
if (t <> '') then
|
|
begin
|
|
writer.AsmLn;
|
|
writer.AsmWrite(t);
|
|
end;
|
|
end;
|
|
writer.AsmLn;
|
|
end;
|
|
else
|
|
internalerror(200704251);
|
|
end;
|
|
end;
|
|
|
|
ait_realconst :
|
|
begin
|
|
WriteRealConstAsBytes(tai_realconst(hp),#9'.byte'#9,do_line);
|
|
end;
|
|
|
|
ait_string :
|
|
begin
|
|
pos:=0;
|
|
if not(target_info.system in systems_aix) then
|
|
begin
|
|
for i:=1 to tai_string(hp).len do
|
|
begin
|
|
if pos=0 then
|
|
begin
|
|
writer.AsmWrite(#9'.ascii'#9'"');
|
|
pos:=20;
|
|
end;
|
|
ch:=tai_string(hp).str[i-1];
|
|
case ch of
|
|
#0, {This can't be done by range, because a bug in FPC}
|
|
#1..#31,
|
|
#128..#255 : s:='\'+tostr(ord(ch) shr 6)+tostr((ord(ch) and 63) shr 3)+tostr(ord(ch) and 7);
|
|
'"' : s:='\"';
|
|
'\' : s:='\\';
|
|
else
|
|
s:=ch;
|
|
end;
|
|
writer.AsmWrite(s);
|
|
inc(pos,length(s));
|
|
if (pos>line_length) or (i=tai_string(hp).len) then
|
|
begin
|
|
writer.AsmWriteLn('"');
|
|
pos:=0;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
WriteAixStringConst(tai_string(hp));
|
|
end;
|
|
|
|
ait_label :
|
|
begin
|
|
if (tai_label(hp).labsym.is_used) then
|
|
begin
|
|
if (tai_label(hp).labsym.bind=AB_PRIVATE_EXTERN) then
|
|
begin
|
|
writer.AsmWrite(#9'.private_extern ');
|
|
writer.AsmWriteln(tai_label(hp).labsym.name);
|
|
end;
|
|
if tai_label(hp).labsym.bind in [AB_GLOBAL,AB_PRIVATE_EXTERN] then
|
|
begin
|
|
{$ifdef arm}
|
|
{ do no change arm mode accidently, .globl seems to reset the mode }
|
|
if GenerateThumbCode or GenerateThumb2Code then
|
|
writer.AsmWriteln(#9'.thumb_func'#9);
|
|
{$endif arm}
|
|
writer.AsmWrite('.globl'#9);
|
|
if replaceforbidden then
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_label(hp).labsym.name))
|
|
else
|
|
writer.AsmWriteLn(tai_label(hp).labsym.name);
|
|
end;
|
|
if replaceforbidden then
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_label(hp).labsym.name))
|
|
else
|
|
writer.AsmWrite(tai_label(hp).labsym.name);
|
|
writer.AsmWriteLn(':');
|
|
end;
|
|
end;
|
|
|
|
ait_symbol :
|
|
begin
|
|
if (tai_symbol(hp).sym.bind=AB_PRIVATE_EXTERN) then
|
|
begin
|
|
writer.AsmWrite(#9'.private_extern ');
|
|
if replaceforbidden then
|
|
writer.AsmWriteln(ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name))
|
|
else
|
|
writer.AsmWriteln(tai_symbol(hp).sym.name);
|
|
end;
|
|
if (target_info.system=system_powerpc64_linux) and
|
|
(tai_symbol(hp).sym.typ=AT_FUNCTION) and
|
|
(cs_profile in current_settings.moduleswitches) then
|
|
writer.AsmWriteLn('.globl _mcount');
|
|
|
|
if tai_symbol(hp).is_global then
|
|
begin
|
|
writer.AsmWrite('.globl'#9);
|
|
if replaceforbidden then
|
|
writer.AsmWriteln(ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name))
|
|
else
|
|
writer.AsmWriteln(tai_symbol(hp).sym.name);
|
|
end;
|
|
if (target_info.system=system_powerpc64_linux) and
|
|
use_dotted_functions and
|
|
(tai_symbol(hp).sym.typ=AT_FUNCTION) then
|
|
begin
|
|
writer.AsmWriteLn('.section ".opd", "aw"');
|
|
writer.AsmWriteLn('.align 3');
|
|
writer.AsmWriteLn(tai_symbol(hp).sym.name + ':');
|
|
writer.AsmWriteLn('.quad .' + tai_symbol(hp).sym.name + ', .TOC.@tocbase, 0');
|
|
writer.AsmWriteLn('.previous');
|
|
writer.AsmWriteLn('.size ' + tai_symbol(hp).sym.name + ', 24');
|
|
if (tai_symbol(hp).is_global) then
|
|
writer.AsmWriteLn('.globl .' + tai_symbol(hp).sym.name);
|
|
writer.AsmWriteLn('.type .' + tai_symbol(hp).sym.name + ', @function');
|
|
{ the dotted name is the name of the actual function entry }
|
|
writer.AsmWrite('.');
|
|
end
|
|
else if (target_info.system in systems_aix) and
|
|
(tai_symbol(hp).sym.typ = AT_FUNCTION) then
|
|
begin
|
|
if target_info.system=system_powerpc_aix then
|
|
begin
|
|
s:=#9'.long .';
|
|
ch:='2';
|
|
end
|
|
else
|
|
begin
|
|
s:=#9'.llong .';
|
|
ch:='3';
|
|
end;
|
|
writer.AsmWriteLn(#9'.csect '+ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name)+'[DS],'+ch);
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name)+':');
|
|
writer.AsmWriteln(s+ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name)+', TOC[tc0], 0');
|
|
writer.AsmWriteln(#9'.csect .text[PR]');
|
|
if (tai_symbol(hp).is_global) then
|
|
writer.AsmWriteLn('.globl .'+ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name))
|
|
else
|
|
writer.AsmWriteLn('.lglobl .'+ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name));
|
|
{ the dotted name is the name of the actual function entry }
|
|
writer.AsmWrite('.');
|
|
end
|
|
else
|
|
begin
|
|
if ((target_info.system <> system_arm_linux) and (target_info.system <> system_arm_android)) then
|
|
sepChar := '@'
|
|
else
|
|
sepChar := '#';
|
|
if (tf_needs_symbol_type in target_info.flags) then
|
|
begin
|
|
writer.AsmWrite(#9'.type'#9 + tai_symbol(hp).sym.name);
|
|
if (needsObject(tai_symbol(hp))) then
|
|
writer.AsmWriteLn(',' + sepChar + 'object')
|
|
else
|
|
writer.AsmWriteLn(',' + sepChar + 'function');
|
|
end;
|
|
end;
|
|
if replaceforbidden then
|
|
if not(tai_symbol(hp).has_value) then
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name + ':'))
|
|
else
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_symbol(hp).sym.name + '=' + tostr(tai_symbol(hp).value)))
|
|
else if not(tai_symbol(hp).has_value) then
|
|
writer.AsmWriteLn(tai_symbol(hp).sym.name + ':')
|
|
else
|
|
writer.AsmWriteLn(tai_symbol(hp).sym.name + '=' + tostr(tai_symbol(hp).value));
|
|
end;
|
|
ait_symbolpair:
|
|
begin
|
|
writer.AsmWrite(#9);
|
|
writer.AsmWrite(symbolpairkindstr[tai_symbolpair(hp).kind]);
|
|
writer.AsmWrite(' ');
|
|
if tai_symbolpair(hp).kind<>spk_localentry then
|
|
s:=', '
|
|
else
|
|
{ the .localentry directive has to specify the size from the
|
|
start till here of the non-local entry code as second argument }
|
|
s:=', .-';
|
|
if replaceforbidden then
|
|
begin
|
|
{ avoid string truncation }
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_symbolpair(hp).sym^)+s);
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_symbolpair(hp).value^));
|
|
end
|
|
else
|
|
begin
|
|
{ avoid string truncation }
|
|
writer.AsmWrite(tai_symbolpair(hp).sym^+s);
|
|
writer.AsmWriteLn(tai_symbolpair(hp).value^);
|
|
end;
|
|
end;
|
|
ait_symbol_end :
|
|
begin
|
|
if tf_needs_symbol_size in target_info.flags then
|
|
begin
|
|
s:=asminfo^.labelprefix+'e'+tostr(symendcount);
|
|
inc(symendcount);
|
|
writer.AsmWriteLn(s+':');
|
|
writer.AsmWrite(#9'.size'#9);
|
|
if (target_info.system=system_powerpc64_linux) and
|
|
use_dotted_functions and
|
|
(tai_symbol_end(hp).sym.typ=AT_FUNCTION) then
|
|
writer.AsmWrite('.');
|
|
if replaceforbidden then
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_symbol_end(hp).sym.name))
|
|
else
|
|
writer.AsmWrite(tai_symbol_end(hp).sym.name);
|
|
writer.AsmWrite(', '+s+' - ');
|
|
if (target_info.system=system_powerpc64_linux) and
|
|
use_dotted_functions and
|
|
(tai_symbol_end(hp).sym.typ=AT_FUNCTION) then
|
|
writer.AsmWrite('.');
|
|
if replaceforbidden then
|
|
writer.AsmWriteLn(ReplaceForbiddenAsmSymbolChars(tai_symbol_end(hp).sym.name))
|
|
else
|
|
writer.AsmWriteLn(tai_symbol_end(hp).sym.name);
|
|
end;
|
|
end;
|
|
|
|
ait_instruction :
|
|
begin
|
|
WriteInstruction(hp);
|
|
end;
|
|
|
|
ait_stab :
|
|
begin
|
|
if assigned(tai_stab(hp).str) then
|
|
begin
|
|
writer.AsmWrite(#9'.'+stabtypestr[tai_stab(hp).stabtype]+' ');
|
|
writer.AsmWritePChar(tai_stab(hp).str);
|
|
writer.AsmLn;
|
|
end;
|
|
end;
|
|
|
|
ait_force_line,
|
|
ait_function_name :
|
|
begin
|
|
{$ifdef DEBUG_AGGAS}
|
|
WriteStr(s,hp.typ);
|
|
writer.AsmWriteLn('# '+s);
|
|
{$endif DEBUG_AGGAS}
|
|
end;
|
|
|
|
ait_cutobject :
|
|
begin
|
|
{$ifdef DEBUG_AGGAS}
|
|
writer.AsmWriteLn('# ait_cutobject');
|
|
{$endif DEBUG_AGGAS}
|
|
if SmartAsm then
|
|
begin
|
|
{ only reset buffer if nothing has changed }
|
|
if not(writer.ClearIfEmpty) then
|
|
begin
|
|
writer.AsmClose;
|
|
DoAssemble;
|
|
writer.AsmCreate(tai_cutobject(hp).place);
|
|
end;
|
|
{ avoid empty files }
|
|
while assigned(hp.next) and (tai(hp.next).typ in [ait_cutobject,ait_section,ait_comment]) do
|
|
begin
|
|
if tai(hp.next).typ=ait_section then
|
|
LastSecType:=tai_section(hp.next).sectype;
|
|
hp:=tai(hp.next);
|
|
end;
|
|
if LastSecType<>sec_none then
|
|
WriteSection(LastSecType,'',secorder_default,last_align);
|
|
writer.MarkEmpty;
|
|
end;
|
|
end;
|
|
|
|
ait_marker :
|
|
begin
|
|
{$ifdef DEBUG_AGGAS}
|
|
WriteStr(s,tai_marker(hp).Kind);
|
|
writer.AsmWriteLn('# ait_marker, kind: '+s);
|
|
{$endif DEBUG_AGGAS}
|
|
if tai_marker(hp).kind=mark_NoLineInfoStart then
|
|
inc(InlineLevel)
|
|
else if tai_marker(hp).kind=mark_NoLineInfoEnd then
|
|
dec(InlineLevel);
|
|
end;
|
|
|
|
ait_directive :
|
|
begin
|
|
WriteDirectiveName(tai_directive(hp).directive);
|
|
if tai_directive(hp).name <>'' then
|
|
begin
|
|
if replaceforbidden then
|
|
writer.AsmWrite(ReplaceForbiddenAsmSymbolChars(tai_directive(hp).name))
|
|
else
|
|
writer.AsmWrite(tai_directive(hp).name);
|
|
end;
|
|
writer.AsmLn;
|
|
end;
|
|
|
|
ait_seh_directive :
|
|
begin
|
|
{$ifndef DISABLE_WIN64_SEH}
|
|
writer.AsmWrite(sehdirectivestr[tai_seh_directive(hp).kind]);
|
|
case tai_seh_directive(hp).datatype of
|
|
sd_none:;
|
|
sd_string:
|
|
begin
|
|
writer.AsmWrite(' '+tai_seh_directive(hp).data.name^);
|
|
if (tai_seh_directive(hp).data.flags and 1)<>0 then
|
|
writer.AsmWrite(',@except');
|
|
if (tai_seh_directive(hp).data.flags and 2)<>0 then
|
|
writer.AsmWrite(',@unwind');
|
|
end;
|
|
sd_reg:
|
|
writer.AsmWrite(' '+gas_regname(tai_seh_directive(hp).data.reg));
|
|
sd_offset:
|
|
writer.AsmWrite(' '+tostr(tai_seh_directive(hp).data.offset));
|
|
sd_regoffset:
|
|
writer.AsmWrite(' '+gas_regname(tai_seh_directive(hp).data.reg)+', '+
|
|
tostr(tai_seh_directive(hp).data.offset));
|
|
end;
|
|
writer.AsmLn;
|
|
{$endif DISABLE_WIN64_SEH}
|
|
end;
|
|
|
|
ait_varloc:
|
|
begin
|
|
if tai_varloc(hp).newlocationhi<>NR_NO then
|
|
writer.AsmWrite(strpnew('Var '+tai_varloc(hp).varsym.realname+' located in register '+
|
|
std_regname(tai_varloc(hp).newlocationhi)+':'+std_regname(tai_varloc(hp).newlocation)))
|
|
else
|
|
writer.AsmWrite(strpnew('Var '+tai_varloc(hp).varsym.realname+' located in register '+
|
|
std_regname(tai_varloc(hp).newlocation)));
|
|
writer.AsmLn;
|
|
end;
|
|
else
|
|
internalerror(2006012201);
|
|
end;
|
|
lasthp:=hp;
|
|
hp:=tai(hp.next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteExtraHeader;
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteExtraFooter;
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteInstruction(hp: tai);
|
|
begin
|
|
InstrWriter.WriteInstruction(hp);
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteWeakSymbolRef(s: tasmsymbol);
|
|
begin
|
|
writer.AsmWriteLn(#9'.weak '+s.name);
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteAixStringConst(hp: tai_string);
|
|
type
|
|
tterminationkind = (term_none,term_string,term_nostring);
|
|
|
|
var
|
|
i: longint;
|
|
pos: longint;
|
|
s: string;
|
|
ch: char;
|
|
instring: boolean;
|
|
|
|
procedure newstatement(terminationkind: tterminationkind);
|
|
begin
|
|
case terminationkind of
|
|
term_none: ;
|
|
term_string:
|
|
writer.AsmWriteLn('"');
|
|
term_nostring:
|
|
writer.AsmLn;
|
|
end;
|
|
writer.AsmWrite(#9'.byte'#9);
|
|
pos:=20;
|
|
instring:=false;
|
|
end;
|
|
|
|
begin
|
|
pos:=0;
|
|
instring:=false;
|
|
for i:=1 to hp.len do
|
|
begin
|
|
if pos=0 then
|
|
newstatement(term_none);
|
|
ch:=hp.str[i-1];
|
|
case ch of
|
|
#0..#31,
|
|
#127..#255 :
|
|
begin
|
|
if instring then
|
|
newstatement(term_string);
|
|
if pos=20 then
|
|
s:=tostr(ord(ch))
|
|
else
|
|
s:=', '+tostr(ord(ch))
|
|
end;
|
|
'"' :
|
|
if instring then
|
|
s:='""'
|
|
else
|
|
begin
|
|
if pos<>20 then
|
|
newstatement(term_nostring);
|
|
s:='"""';
|
|
instring:=true;
|
|
end;
|
|
else
|
|
if not instring then
|
|
begin
|
|
if (pos<>20) then
|
|
newstatement(term_nostring);
|
|
s:='"'+ch;
|
|
instring:=true;
|
|
end
|
|
else
|
|
s:=ch;
|
|
end;
|
|
writer.AsmWrite(s);
|
|
inc(pos,length(s));
|
|
if (pos>line_length) or (i=tai_string(hp).len) then
|
|
begin
|
|
if instring then
|
|
writer.AsmWriteLn('"')
|
|
else
|
|
writer.AsmLn;
|
|
pos:=0;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteAixIntConst(hp: tai_const);
|
|
var
|
|
pos, size: longint;
|
|
begin
|
|
{ only big endian AIX supported for now }
|
|
if target_info.endian<>endian_big then
|
|
internalerror(2012010401);
|
|
{ limitation: can only write 4 bytes at a time }
|
|
pos:=0;
|
|
size:=tai_const(hp).size;
|
|
while pos<(size-4) do
|
|
begin
|
|
writer.AsmWrite(#9'.vbyte'#9'4, ');
|
|
writer.AsmWriteln(tostr(longint(tai_const(hp).value shr ((size-pos-4)*8))));
|
|
inc(pos,4);
|
|
end;
|
|
writer.AsmWrite(#9'.vbyte'#9);
|
|
writer.AsmWrite(tostr(size-pos));
|
|
writer.AsmWrite(', ');
|
|
case size-pos of
|
|
1: writer.AsmWrite(tostr(byte(tai_const(hp).value)));
|
|
2: writer.AsmWrite(tostr(word(tai_const(hp).value)));
|
|
4: writer.AsmWrite(tostr(longint(tai_const(hp).value)));
|
|
else
|
|
internalerror(2012010402);
|
|
end;
|
|
end;
|
|
|
|
procedure TGNUAssembler.WriteUnalignedIntConst(hp: tai_const);
|
|
var
|
|
pos, size: longint;
|
|
begin
|
|
size:=tai_const(hp).size;
|
|
writer.AsmWrite(#9'.byte'#9);
|
|
if target_info.endian=endian_big then
|
|
begin
|
|
pos:=size-1;
|
|
while pos>=0 do
|
|
begin
|
|
writer.AsmWrite(tostr((tai_const(hp).value shr (pos*8)) and $ff));
|
|
dec(pos);
|
|
if pos>=0 then
|
|
writer.AsmWrite(', ')
|
|
else
|
|
writer.AsmLn;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
pos:=0;
|
|
while pos<size do
|
|
begin
|
|
writer.AsmWriteln(tostr((tai_const(hp).value shr (pos*8)) and $ff));
|
|
inc(pos);
|
|
if pos<=size then
|
|
writer.AsmWrite(', ')
|
|
else
|
|
writer.AsmLn;
|
|
end;
|
|
end;
|
|
writer.AsmLn;
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteDirectiveName(dir: TAsmDirective);
|
|
begin
|
|
{ TODO: implement asd_cpu for GAS => usually .arch or .cpu, but the CPU
|
|
name has to be translated as well }
|
|
if dir=asd_cpu then
|
|
writer.AsmWrite(asminfo^.comment+' CPU ')
|
|
else
|
|
writer.AsmWrite('.'+directivestr[dir]+' ');
|
|
end;
|
|
|
|
|
|
procedure TGNUAssembler.WriteAsmList;
|
|
var
|
|
n : string;
|
|
hal : tasmlisttype;
|
|
i: longint;
|
|
begin
|
|
{$ifdef EXTDEBUG}
|
|
if current_module.mainsource<>'' then
|
|
Comment(V_Debug,'Start writing gas-styled assembler output for '+current_module.mainsource);
|
|
{$endif}
|
|
|
|
if current_module.mainsource<>'' then
|
|
n:=ExtractFileName(current_module.mainsource)
|
|
else
|
|
n:=InputFileName;
|
|
|
|
{ gcc does not add it either for Darwin. Grep for
|
|
TARGET_ASM_FILE_START_FILE_DIRECTIVE in gcc/config/*.h
|
|
}
|
|
if not(target_info.system in systems_darwin) then
|
|
writer.AsmWriteLn(#9'.file "'+FixFileName(n)+'"');
|
|
|
|
WriteExtraHeader;
|
|
writer.MarkEmpty;
|
|
symendcount:=0;
|
|
|
|
for hal:=low(TasmlistType) to high(TasmlistType) do
|
|
begin
|
|
if not (current_asmdata.asmlists[hal].empty) then
|
|
begin
|
|
writer.AsmWriteLn(asminfo^.comment+'Begin asmlist '+AsmlistTypeStr[hal]);
|
|
writetree(current_asmdata.asmlists[hal]);
|
|
writer.AsmWriteLn(asminfo^.comment+'End asmlist '+AsmlistTypeStr[hal]);
|
|
end;
|
|
end;
|
|
|
|
{ add weak symbol markers }
|
|
for i:=0 to current_asmdata.asmsymboldict.count-1 do
|
|
if (tasmsymbol(current_asmdata.asmsymboldict[i]).bind=AB_WEAK_EXTERNAL) then
|
|
WriteWeakSymbolRef(tasmsymbol(current_asmdata.asmsymboldict[i]));
|
|
|
|
if create_smartlink_sections and
|
|
(target_info.system in systems_darwin) then
|
|
writer.AsmWriteLn(#9'.subsections_via_symbols');
|
|
|
|
{ "no executable stack" marker }
|
|
{ TODO: used by OpenBSD/NetBSD as well? }
|
|
if (target_info.system in (systems_linux + systems_android + systems_freebsd + systems_dragonfly)) and
|
|
not(cs_executable_stack in current_settings.moduleswitches) then
|
|
begin
|
|
writer.AsmWriteLn('.section .note.GNU-stack,"",%progbits');
|
|
end;
|
|
|
|
writer.AsmLn;
|
|
WriteExtraFooter;
|
|
{$ifdef EXTDEBUG}
|
|
if current_module.mainsource<>'' then
|
|
Comment(V_Debug,'Done writing gas-styled assembler output for '+current_module.mainsource);
|
|
{$endif EXTDEBUG}
|
|
end;
|
|
|
|
|
|
{****************************************************************************}
|
|
{ Apple/GNU Assembler writer }
|
|
{****************************************************************************}
|
|
|
|
function TAppleGNUAssembler.sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;
|
|
begin
|
|
if (target_info.system in systems_darwin) then
|
|
case atype of
|
|
sec_user:
|
|
begin
|
|
result:='.section '+aname;
|
|
exit;
|
|
end;
|
|
sec_bss:
|
|
{ all bss (lcomm) symbols are automatically put in the right }
|
|
{ place by using the lcomm assembler directive }
|
|
atype := sec_none;
|
|
sec_debug_frame,
|
|
sec_eh_frame:
|
|
begin
|
|
result := '.section __DWARF,__debug_info,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_debug_line:
|
|
begin
|
|
result := '.section __DWARF,__debug_line,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_debug_info:
|
|
begin
|
|
result := '.section __DWARF,__debug_info,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_debug_abbrev:
|
|
begin
|
|
result := '.section __DWARF,__debug_abbrev,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_debug_aranges:
|
|
begin
|
|
result := '.section __DWARF,__debug_aranges,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_debug_ranges:
|
|
begin
|
|
result := '.section __DWARF,__debug_ranges,regular,debug';
|
|
exit;
|
|
end;
|
|
sec_rodata:
|
|
begin
|
|
result := '.const_data';
|
|
exit;
|
|
end;
|
|
sec_rodata_norel:
|
|
begin
|
|
result := '.const';
|
|
exit;
|
|
end;
|
|
sec_fpc:
|
|
begin
|
|
result := '.section __TEXT, .fpc, regular, no_dead_strip';
|
|
exit;
|
|
end;
|
|
sec_code:
|
|
begin
|
|
if (aname='fpc_geteipasebx') or
|
|
(aname='fpc_geteipasecx') then
|
|
begin
|
|
result:='.section __TEXT,__textcoal_nt,coalesced,pure_instructions'#10'.weak_definition '+aname+
|
|
#10'.private_extern '+aname;
|
|
exit;
|
|
end;
|
|
end;
|
|
sec_data_nonlazy:
|
|
begin
|
|
result:='.section __DATA, __nl_symbol_ptr,non_lazy_symbol_pointers';
|
|
exit;
|
|
end;
|
|
sec_data_lazy:
|
|
begin
|
|
result:='.section __DATA, __la_symbol_ptr,lazy_symbol_pointers';
|
|
exit;
|
|
end;
|
|
sec_init_func:
|
|
begin
|
|
result:='.section __DATA, __mod_init_func, mod_init_funcs';
|
|
exit;
|
|
end;
|
|
sec_term_func:
|
|
begin
|
|
result:='.section __DATA, __mod_term_func, mod_term_funcs';
|
|
exit;
|
|
end;
|
|
low(TObjCAsmSectionType)..high(TObjCAsmSectionType):
|
|
begin
|
|
result:='.section '+objc_section_name(atype);
|
|
exit
|
|
end;
|
|
end;
|
|
result := inherited sectionname(atype,aname,aorder);
|
|
end;
|
|
|
|
|
|
procedure TAppleGNUAssembler.WriteWeakSymbolRef(s: tasmsymbol);
|
|
begin
|
|
writer.AsmWriteLn(#9'.weak_reference '+s.name);
|
|
end;
|
|
|
|
procedure TAppleGNUAssembler.WriteDirectiveName(dir: TAsmDirective);
|
|
begin
|
|
case dir of
|
|
asd_weak_reference:
|
|
writer.AsmWrite('.weak_reference ');
|
|
asd_weak_definition:
|
|
writer.AsmWrite('.weak_definition ');
|
|
else
|
|
inherited;
|
|
end;
|
|
end;
|
|
|
|
|
|
{****************************************************************************}
|
|
{ a.out/GNU Assembler writer }
|
|
{****************************************************************************}
|
|
|
|
function TAoutGNUAssembler.sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;
|
|
const
|
|
(* Translation table - replace unsupported section types with basic ones. *)
|
|
SecXTable: array[TAsmSectionType] of TAsmSectionType = (
|
|
sec_none,
|
|
sec_none,
|
|
sec_code,
|
|
sec_data,
|
|
sec_data (* sec_rodata *),
|
|
sec_data (* sec_rodata_norel *),
|
|
sec_bss,
|
|
sec_data (* sec_threadvar *),
|
|
{ used for wince exception handling }
|
|
sec_code (* sec_pdata *),
|
|
{ used for darwin import stubs }
|
|
sec_code (* sec_stub *),
|
|
sec_data,(* sec_data_nonlazy *)
|
|
sec_data,(* sec_data_lazy *)
|
|
sec_data,(* sec_init_func *)
|
|
sec_data,(* sec_term_func *)
|
|
{ stabs }
|
|
sec_stab,sec_stabstr,
|
|
{ win32 }
|
|
sec_data (* sec_idata2 *),
|
|
sec_data (* sec_idata4 *),
|
|
sec_data (* sec_idata5 *),
|
|
sec_data (* sec_idata6 *),
|
|
sec_data (* sec_idata7 *),
|
|
sec_data (* sec_edata *),
|
|
{ C++ exception handling unwinding (uses dwarf) }
|
|
sec_eh_frame,
|
|
{ dwarf }
|
|
sec_debug_frame,
|
|
sec_debug_info,
|
|
sec_debug_line,
|
|
sec_debug_abbrev,
|
|
sec_debug_aranges,
|
|
sec_debug_ranges,
|
|
{ ELF resources (+ references to stabs debug information sections) }
|
|
sec_code (* sec_fpc *),
|
|
{ Table of contents section }
|
|
sec_code (* sec_toc *),
|
|
sec_code (* sec_init *),
|
|
sec_code (* sec_fini *),
|
|
sec_none (* sec_objc_class *),
|
|
sec_none (* sec_objc_meta_class *),
|
|
sec_none (* sec_objc_cat_cls_meth *),
|
|
sec_none (* sec_objc_cat_inst_meth *),
|
|
sec_none (* sec_objc_protocol *),
|
|
sec_none (* sec_objc_string_object *),
|
|
sec_none (* sec_objc_cls_meth *),
|
|
sec_none (* sec_objc_inst_meth *),
|
|
sec_none (* sec_objc_cls_refs *),
|
|
sec_none (* sec_objc_message_refs *),
|
|
sec_none (* sec_objc_symbols *),
|
|
sec_none (* sec_objc_category *),
|
|
sec_none (* sec_objc_class_vars *),
|
|
sec_none (* sec_objc_instance_vars *),
|
|
sec_none (* sec_objc_module_info *),
|
|
sec_none (* sec_objc_class_names *),
|
|
sec_none (* sec_objc_meth_var_types *),
|
|
sec_none (* sec_objc_meth_var_names *),
|
|
sec_none (* sec_objc_selector_strs *),
|
|
sec_none (* sec_objc_protocol_ext *),
|
|
sec_none (* sec_objc_class_ext *),
|
|
sec_none (* sec_objc_property *),
|
|
sec_none (* sec_objc_image_info *),
|
|
sec_none (* sec_objc_cstring_object *),
|
|
sec_none (* sec_objc_sel_fixup *),
|
|
sec_none (* sec_objc_data *),
|
|
sec_none (* sec_objc_const *),
|
|
sec_none (* sec_objc_sup_refs *),
|
|
sec_none (* sec_data_coalesced *),
|
|
sec_none (* sec_objc_classlist *),
|
|
sec_none (* sec_objc_nlclasslist *),
|
|
sec_none (* sec_objc_catlist *),
|
|
sec_none (* sec_objc_nlcatlist *),
|
|
sec_none (* sec_objc_protlist *),
|
|
sec_none (* sec_stack *),
|
|
sec_none (* sec_heap *)
|
|
);
|
|
begin
|
|
Result := inherited SectionName (SecXTable [AType], AName, AOrder);
|
|
end;
|
|
|
|
|
|
{****************************************************************************}
|
|
{ Abstract Instruction Writer }
|
|
{****************************************************************************}
|
|
|
|
constructor TCPUInstrWriter.create(_owner: TGNUAssembler);
|
|
begin
|
|
inherited create;
|
|
owner := _owner;
|
|
end;
|
|
|
|
end.
|