i86dfsup.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 279 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include "standard.h"
#include "hostsys.h"
#include "coderep.h"
#include "pattern.h"
#include "procdef.h"
#include "cgdefs.h"
#include "sysmacro.h"
#include "symdbg.h"
#include "model.h"
#include "ocentry.h"
#include "objrep.h"
#include "i86obj.h"
#include "zoiks.h"
#include "cgaux.h"
#include "typedef.h"
#include "dbgstrct.h"
#include <stdio.h>
#include <stdarg.h>
#include <setjmp.h>
#include <stdlib.h>
#include <string.h>
#include "dw.h"
#include "dwarf.h"
#include "dfdbg.h"
#define BY_CG
#include "cgprotos.h"

#if _TARGET & _TARG_IAPX86
extern  hw_reg_set      Low32Reg(hw_reg_set);
#elif _TARGET & _TARG_80386
extern  hw_reg_set      Low64Reg(hw_reg_set);
#endif


extern  seg_id          DbgSegDef( char *, char *, int  );
extern  hw_reg_set      StackReg(void);
extern  hw_reg_set      DisplayReg(void);
extern  void            OutBckExport( char *name, bool is_export );
extern  void            BackImpPtr( char *nm, bck_info *bck, offset plus );


extern  dw_client       Client;

struct dbg_seg_names {
    char        *seg_name;
    char        *class_name;
};

static struct dbg_seg_names DwarfSegNames[DW_DEBUG_MAX] = {
    { ".debug_info", "DWARF" },
    { ".debug_pubnames",   "DWARF" },
    { ".debug_aranges",   "DWARF" },
    { ".debug_line",   "DWARF" },
    { ".debug_loc",   "DWARF" },
    { ".debug_abbrev",   "DWARF" },
    { ".debug_macinfo",   "DWARF" },
    { ".debug_str",   "DWARF" },
    { ".WATCOM_references", "DWARF" }
};


extern struct sect_info DwarfSegs[ DW_DEBUG_MAX ];



extern  void    DFDefSegs( void ){
/********************************/

    if( _IsModel( DBG_LOCALS | DBG_TYPES ) ) {
        int         i;

        for( i = 0; i < DW_DEBUG_MAX; ++i ){
            DwarfSegs[i].seg = DbgSegDef( DwarfSegNames[i].seg_name,
                                     DwarfSegNames[i].class_name,
                                     SEG_COMB_NORMAL+SEG_USE_32 );
            DwarfSegs[i].bck = NULL;
        }
    }else if( _IsModel( NUMBERS ) ){
            DwarfSegs[DW_DEBUG_LINE].seg = DbgSegDef( DwarfSegNames[DW_DEBUG_LINE].seg_name,
                                     DwarfSegNames[DW_DEBUG_LINE].class_name,
                                     SEG_COMB_NORMAL+SEG_USE_32 );
            DwarfSegs[DW_DEBUG_LINE].bck = NULL;
    }
}

typedef enum {
    #define DW_REG( __n  )   DW_REG_##__n,
    #include "dwreginf.h"
    DW_REG( MAX )
    #undef DW_REG
}dw_regs;

/* lifted from dbsupp probably canbe merged */

struct reg_map {
    hw_reg_set reg;
    dw_regs    dwarf;
};

#define REG_MAP_SIZE 38
static struct reg_map    HWRegValues[REG_MAP_SIZE] = {
   { HW_D( HW_AL ),  DW_REG_al },
   { HW_D( HW_AH ),  DW_REG_ah },
   { HW_D( HW_BL ),  DW_REG_bl },
   { HW_D( HW_BH ),  DW_REG_bh },
   { HW_D( HW_CL ),  DW_REG_cl },
   { HW_D( HW_CH ),  DW_REG_ch },
   { HW_D( HW_DL ),  DW_REG_dl },
   { HW_D( HW_DH ),  DW_REG_dh },
   { HW_D( HW_AX ),  DW_REG_ax },
   { HW_D( HW_BX ),  DW_REG_bx },
   { HW_D( HW_CX ),  DW_REG_cx },
   { HW_D( HW_DX ),  DW_REG_dx },
   { HW_D( HW_SI ),  DW_REG_si },
   { HW_D( HW_DI ),  DW_REG_di },
#if _TARGET & _TARG_80386
   { HW_D( HW_BP ),  DW_REG_ebp },
   { HW_D( HW_SP ),  DW_REG_esp },
#elif _TARGET & _TARG_IAPX86
   { HW_D( HW_BP ),  DW_REG_bp },
   { HW_D( HW_SP ),  DW_REG_sp },
#endif
   { HW_D( HW_CS ),  DW_REG_cs },
   { HW_D( HW_SS ),  DW_REG_ss },
   { HW_D( HW_DS ),  DW_REG_ds },
   { HW_D( HW_ES ),  DW_REG_es },
   { HW_D( HW_ST0 ), DW_REG_st0 },
   { HW_D( HW_ST1 ), DW_REG_st1 },
   { HW_D( HW_ST2 ), DW_REG_st2 },
   { HW_D( HW_ST3 ), DW_REG_st3 },
   { HW_D( HW_ST4 ), DW_REG_st4 },
   { HW_D( HW_ST5 ), DW_REG_st5 },
   { HW_D( HW_ST6 ), DW_REG_st6 },
   { HW_D( HW_ST7 ), DW_REG_st7 },
   { HW_D( HW_EAX ), DW_REG_eax },
   { HW_D( HW_EBX ), DW_REG_ebx },
   { HW_D( HW_ECX ), DW_REG_ecx },
   { HW_D( HW_EDX ), DW_REG_edx },
   { HW_D( HW_ESI ), DW_REG_esi },
   { HW_D( HW_EDI ), DW_REG_edi },
   { HW_D( HW_BP ),  DW_REG_bp },
   { HW_D( HW_SP ),  DW_REG_sp },
   { HW_D( HW_FS ),  DW_REG_fs },
   { HW_D( HW_GS ),  DW_REG_gs }
};

static  uint   DFRegMap( hw_reg_set hw_reg ) {
/***********************************************/


    dw_regs           ret;
    struct reg_map   *map, *end;

    map = &HWRegValues[0];
    end =  &HWRegValues[REG_MAP_SIZE];
    ret = DW_REG_MAX;
    while( map < end ){
        if( HW_Equal( map->reg, hw_reg ) ){
            ret = map->dwarf;
            goto found;
        }
        ++map;
    }
    Zoiks( ZOIKS_085 );/* reg not found */
found:
    return( ret );
}

extern  void   DFOutReg( dw_loc_id locid, name *reg ) {
/***********************************************/

    hw_reg_set  hw_reg;
    hw_reg_set  hw_low;
    dw_regs     regnum;
    hw_reg = reg->r.reg;
#if _TARGET & _TARG_IAPX86
    if( HW_CEqual( hw_reg, HW_ABCD ) ) {
        DWLocReg( Client, locid, DW_REG_dx );
        DWLocPiece( Client, locid, WD );
        DWLocReg( Client, locid, DW_REG_cx );
        DWLocPiece( Client, locid, WD );
        DWLocReg( Client, locid, DW_REG_bx );
        DWLocPiece( Client, locid, WD );
        DWLocReg( Client, locid, DW_REG_ax );
        DWLocPiece( Client, locid, WD );
        return;
    }
#endif
#if _TARGET & _TARG_80386
    hw_low = Low64Reg( hw_reg );
#elif _TARGET & _TARG_IAPX86
    hw_low = Low32Reg( hw_reg );
#endif
    if( HW_CEqual( hw_low, HW_EMPTY ) ) {
        regnum = DFRegMap( hw_reg );
        DWLocReg( Client, locid, regnum );
   } else {
        regnum =  DFRegMap( hw_low );
        DWLocReg( Client, locid, regnum );
        DWLocPiece( Client, locid, WD );
        HW_TurnOff( hw_reg, hw_low );
        regnum = DFRegMap( hw_reg );
        DWLocReg( Client, locid, regnum );
        DWLocPiece( Client, locid, WD );
    }
}

extern  void   DFOutRegInd( dw_loc_id locid, name *reg ) {
/***********************************************/

    dw_regs     regnum;

    regnum = DFRegMap(  reg->r.reg );
    DWLocOp( Client,locid,DW_LOC_breg, regnum, 0 );
}

extern uint DFStkReg( void ){
    dw_regs    ret;
    hw_reg_set stk;

    stk = StackReg();
    ret = DFRegMap( stk );
    return( ret );
}
extern uint DFDisplayReg( void ){
    dw_regs    ret;
    hw_reg_set dsp;

    dsp = DisplayReg();
    ret = DFRegMap( dsp );
    return( ret );
}
#define ABBREV_NAME  "___DFABBREV"
extern void DFAbbrevRef( void ){
/******************************/
    bck_info    *bck;

    bck =  BENewBack( NULL );
    BackImpPtr( ABBREV_NAME, bck, 0 );
    BEFreeBack( bck );
}

extern void DFAbbrevDef( void ){
/******************************/
    OutBckExport( ABBREV_NAME, TRUE );
}