axpreg.c

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/****************************************************************************
*
*                            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 <stddef.h>
#include <string.h>
#include <ctype.h>
#include "axp.h"
#include "axptypes.h"
#include "madregs.h"

#define BIT_OFF( who ) (offsetof( mad_registers, axp.who ) * BITS_PER_BYTE)

enum {
    RS_NONE,
    RS_INT,
    RS_FLT,
    RS_FPCR,
    RS_NT_SOFTFPCR,
    RS_NT_PSR,
    RS_NUM,
};

#define REG_NAME( name )        const char NAME_##name[] = #name

typedef struct {
    char                name[5];
    unsigned_8          start;
    mad_type_handle     mth;
} sublist_data;

static const sublist_data IntRegSubData[] = {
        { "b0",  0, AXPT_BYTE },
        { "b1",  8, AXPT_BYTE },
        { "b2", 16, AXPT_BYTE },
        { "b3", 24, AXPT_BYTE },
        { "b4", 32, AXPT_BYTE },
        { "b5", 40, AXPT_BYTE },
        { "b6", 48, AXPT_BYTE },
        { "b7", 56, AXPT_BYTE },
        { "w0",  0, AXPT_WORD },
        { "w1", 16, AXPT_WORD },
        { "w2", 32, AXPT_WORD },
        { "w3", 48, AXPT_WORD },
        { "l0",  0, AXPT_LWORD },
        { "l1", 32, AXPT_LWORD },
};

static const sublist_data FltRegSubData[] = {
        { "t", 0, AXPT_DOUBLE },
        { "g", 0, AXPT_RG_FLOAT },
};

#define sublist( name, type, reg_set, base, start, len )        \
        { { NAME_##name,                \
            AXPT_##type,                \
            BIT_OFF( base )+start,      \
            len,                        \
            1 },                        \
            PAL_all, reg_set##_REG_SET, RS_NONE },

REG_NAME( invd );
REG_NAME( dzed );
REG_NAME( ovfd );
REG_NAME( inv );
REG_NAME( dze );
REG_NAME( ovf );
REG_NAME( unf );
REG_NAME( ine );
REG_NAME( iov );
REG_NAME( dyn );
REG_NAME( sum );

static const axp_reg_info       FPCRSubList[] = {
    sublist( invd,BYTE, FPU, r[AR_fpcr], 49, 1 )
    sublist( dzed,BYTE, FPU, r[AR_fpcr], 50, 1 )
    sublist( ovfd,BYTE, FPU, r[AR_fpcr], 51, 1 )
    sublist( inv, BYTE, FPU, r[AR_fpcr], 52, 1 )
    sublist( dze, BYTE, FPU, r[AR_fpcr], 53, 1 )
    sublist( ovf, BYTE, FPU, r[AR_fpcr], 54, 1 )
    sublist( unf, BYTE, FPU, r[AR_fpcr], 55, 1 )
    sublist( ine, BYTE, FPU, r[AR_fpcr], 56, 1 )
    sublist( iov, BYTE, FPU, r[AR_fpcr], 57, 1 )
    sublist( dyn, BYTE, FPU, r[AR_fpcr], 58, 2 )
    sublist( sum, BYTE, FPU, r[AR_fpcr], 63, 1 )
    { NULL }
};

REG_NAME( mode );
REG_NAME( ie );
REG_NAME( irql );

static const axp_reg_info       NTPSRSubList[] = {
    sublist( mode, BYTE, CPU, pal.nt.psr, 0, 1 )
    sublist( ie,   BYTE, CPU, pal.nt.psr, 1, 1 )
    sublist( irql, BYTE, CPU, pal.nt.psr, 2, 3 )
    { NULL }
};

static const axp_reg_info       *SubList[] =
{
    NULL,
    NULL,
    NULL,
    FPCRSubList,
    NULL,       //NT SOFTFPCR
    NTPSRSubList
};

#define AXPT_U32                AXPT_LWORD
#define AXPT_U64                AXPT_QWORD
#define XREG_TYPE( bits )       AXPT_U##bits
#define REG_TYPE( bits )        XREG_TYPE( bits )

#define REG_BITS_INT    64
#define REG_BITS_FLT    64
#define REG_BITS_FPCR   REG_BITS_INT

#define RT_INT  REG_TYPE( REG_BITS_INT )
#define RT_FLT  AXPT_DOUBLE
#define RT_FPCR RT_INT

/* to avoid relocations to R/W data segments */
#define regpick( name, type, s ) REG_NAME( name );
#define palpick( pal, name )     static const char NAME_##pal##_##name[] = #name;
#include "axpregs.h"
#undef regpick
#undef palpick

#define regpick( name, type, reg_set )  \
        { { NAME_##name,                \
            RT_##type,                  \
            BIT_OFF( r[AR_##name] ),    \
            REG_BITS_##type,            \
            1 },                        \
            PAL_all, reg_set##_REG_SET, RS_##type },

//NYI: unix, vms pal registers

#define PR_nt_fir                       \
        { { NAME_nt_fir,                \
            RT_INT,                     \
            BIT_OFF( pal.nt.fir ),      \
            REG_BITS_INT,               \
            1 },                        \
            PAL_nt, 0, RS_NONE }

#define PR_nt_softfpcr                  \
        { { NAME_nt_softfpcr,           \
            RT_INT,                     \
            BIT_OFF( pal.nt.softfpcr ), \
            REG_BITS_INT,               \
            1 },                        \
            PAL_nt, 0, RS_NT_SOFTFPCR }

#define PR_nt_psr                       \
        { { NAME_nt_psr,                \
            AXPT_U32,                   \
            BIT_OFF( pal.nt.psr ),      \
            32,                         \
            1 },                        \
            PAL_nt, 0, RS_NT_PSR }

#define palpick( pal, name )    PR_##pal##_##name,

const axp_reg_info RegList[] = {
    #include "axpregs.h"
};

static axp_reg_info             **RegSubList;

static const mad_toggle_strings CPUToggleList[] =
{
    {MSTR_MHEX,MSTR_HEX,MSTR_DECIMAL},
    {MSTR_MEXTENDED,MSTR_REG_EXTENDED,MSTR_REG_NORMAL},
    {MSTR_MSYMBOLIC,MSTR_REG_SYMBOLIC,MSTR_REG_NUMERIC},
    {MSTR_NIL,MSTR_NIL,MSTR_NIL}
};

static const mad_toggle_strings FPUToggleList[] =
{
    {MSTR_MHEX,MSTR_HEX,MSTR_DECIMAL},
    {MSTR_MVAX,MSTR_VAX,MSTR_IEEE},
    {MSTR_NIL,MSTR_NIL,MSTR_NIL}
};

struct mad_reg_set_data {
    mad_status (*get_piece)( unsigned piece, char **descript, unsigned *max_descript, const mad_reg_info **reg, mad_type_handle *disp_type, unsigned *max_value );
    const mad_toggle_strings    *togglelist;
    mad_string                  name;
};

static mad_status       CPUGetPiece( unsigned piece,
                                char **descript,
                                unsigned *max_descript,
                                const mad_reg_info **reg,
                                mad_type_handle *disp_type,
                                unsigned *max_value );

static mad_status       FPUGetPiece( unsigned piece,
                                char **descript,
                                unsigned *max_descript,
                                const mad_reg_info **reg,
                                mad_type_handle *disp_type,
                                unsigned *max_value );

static const mad_reg_set_data RegSet[] = {
    { CPUGetPiece, CPUToggleList, MSTR_CPU },
    { FPUGetPiece, FPUToggleList, MSTR_FPU },
};

axp_pal CurrPAL;


mad_status GetPData( addr_off off, axp_pdata *pdata )
{
    address     a;

    memset( &a, 0, sizeof( a ) );
    a.mach.offset = off;
    MCMachineData( a, AXPMD_PDATA, 0, NULL, sizeof( *pdata ), pdata );
    if( pdata->pro_end_addr.u._32[0] < pdata->beg_addr.u._32[0]
     || pdata->pro_end_addr.u._32[0] >= pdata->end_addr.u._32[0] ) {
        /*
           This is a procedure with different exception handlers for
           different portions - pro_end_addr is the address of the
           start of the procedure in this case.
        */
        a.mach.offset = pdata->pro_end_addr.u._32[0];
        MCMachineData( a, AXPMD_PDATA, 0, NULL, sizeof( *pdata ), pdata );
    }
    return( MS_OK );
}

int VariableFrame( addr_off off )
{
    axp_pdata   pdata;
    unsigned_32 ins;
    address     a;

    if( GetPData( off, &pdata ) != MS_OK ) return( 0 );
    if( pdata.pro_end_addr.u._32[0] == pdata.beg_addr.u._32[0] ) {
        return( 0 );
    }
    memset( &a, 0, sizeof( a ) );
    a.mach.offset = pdata.pro_end_addr.u._32[0] - sizeof( ins );
    MCReadMem( a, sizeof( ins ), &ins );
    return( ins == INS_MOV_SP_FP );
}

unsigned        DIGENTRY MIRegistersSize( void )
{
    return( sizeof( struct axp_mad_registers ) );
}

mad_status      DIGENTRY MIRegistersHost( mad_registers *mr )
{
    /* stash for the register walker */
    CurrPAL = mr->axp.active_pal;
    return( MS_OK );
}

mad_status      DIGENTRY MIRegistersTarget( mad_registers *mr )
{
    return( MS_OK );
}

walk_result     DIGENTRY MIRegSetWalk( mad_type_kind tk, MI_REG_SET_WALKER *wk, void *d )
{
    walk_result wr;

    if( tk & MTK_INTEGER ) {
        wr = wk( &RegSet[CPU_REG_SET], d );
        if( wr != WR_CONTINUE ) return( wr );
    }
    if( tk & MTK_FLOAT ) {
        wr = wk( &RegSet[FPU_REG_SET], d );
        if( wr != WR_CONTINUE ) return( wr );
    }
    return( WR_CONTINUE );
}

mad_string      DIGENTRY MIRegSetName( const mad_reg_set_data *rsd )
{
    return( rsd->name );
}

unsigned        DIGENTRY MIRegSetLevel( const mad_reg_set_data *rsd, unsigned max, char *buff )
{
    const char  *str;
    unsigned    len;

    str = "";
    if( rsd == &RegSet[CPU_REG_SET] ) {
        switch( MCSystemConfig()->cpu ) {
        case AXP_21064:
            str = "21064";
            break;
        case AXP_21164:
            str = "21164";
            break;
        }
    }
    len = strlen( str );
    if( max > 0 ) {
        --max;
        if( max > len ) max = len;
        memcpy( buff, str, max );
        buff[max] = '\0';
    }
    return( len );
}

unsigned        DIGENTRY MIRegSetDisplayGrouping( const mad_reg_set_data *rsd )
{
    return( 0 );
}

static char     DescriptBuff[10];

typedef struct {
    unsigned_16         first_reg_idx;
    unsigned_8          num_regs;
    unsigned_8          disp_type;
} reg_display_entry;

static const reg_display_entry CPUNumeric[] = {
    { IDX_r0,           31, RT_INT },
    { IDX_nt_fir,        1, RT_INT },
    { IDX_nt_psr,        1, AXPT_U32 },
    { 0,                 0, 0 }
};

static const reg_display_entry CPUSymbolic[] = {
    { IDX_v0,           31, RT_INT },
    { IDX_nt_fir,        1, RT_INT },
    { IDX_nt_psr,        1, AXPT_U32 },
    { 0,                 0, 0 }
};

static int FindEntry( const reg_display_entry *tbl, unsigned piece,
                                unsigned *idx, mad_type_handle *type )
{
    for( ;; ) {
        if( tbl->num_regs == 0 ) return( 0 );
        if( tbl->num_regs > piece ) break;
        piece -= tbl->num_regs;
        ++tbl;
    }
    *idx = tbl->first_reg_idx + piece;
    *type = tbl->disp_type;
    return( 1 );
}


static mad_status       CPUGetPiece( unsigned piece,
                                char **descript,
                                unsigned *max_descript,
                                const mad_reg_info **reg,
                                mad_type_handle *disp_type,
                                unsigned *max_value )
{
    unsigned    idx;

    if( MADState->reg_state[CPU_REG_SET] & CT_SYMBOLIC_NAMES ) {
        if( !FindEntry( CPUSymbolic, piece, &idx, disp_type ) ) return( MS_FAIL );
    } else {
        if( !FindEntry( CPUNumeric, piece, &idx, disp_type ) ) return( MS_FAIL );
    }
    if( !(MADState->reg_state[CPU_REG_SET] & CT_EXTENDED) ) {
        if( *disp_type == AXPT_QWORD ) *disp_type = AXPT_LWORD;
    }
    if( !(MADState->reg_state[CPU_REG_SET] & CT_HEX) ) {
        switch( *disp_type ) {
        case AXPT_QWORD:
            *disp_type = AXPT_UINT64;
            break;
        case AXPT_LWORD:
            *disp_type = AXPT_ULONG;
            break;
        }
    }
    *descript = DescriptBuff;
    *max_descript = 0;
    *max_value = 0;
    *reg = &RegList[idx].info;
    strcpy( DescriptBuff, (*reg)->name );