C++ (Cpp) nteh_EBPoffset_prev Examples

Example #1

File: nteh.c Project: klickverbot/dmd

code *nteh_unwind(regm_t retregs,unsigned index)
{
    code cs;
    regm_t desregs;
    int reg;
    int local_unwind;

    // Shouldn't this always be CX?
#if SCPP
    reg = AX;
#else
    reg = CX;
#endif

#if MARS
    local_unwind = RTLSYM_D_LOCAL_UNWIND2;
#else
    local_unwind = RTLSYM_LOCAL_UNWIND2;
#endif
    desregs = (~getRtlsym(local_unwind)->Sregsaved & (ALLREGS)) | mask[reg];
    code *cs1;
    code *cs2;
    gensaverestore(retregs & desregs,&cs1,&cs2);

    CodeBuilder cdb(getregs(desregs));

    cs.Iop = 0x8D;
    cs.Irm = modregrm(2,reg,BPRM);
    cs.Iflags = 0;
    cs.Irex = 0;
    cs.IFL1 = FLconst;
    // EBP offset of __context.prev
    cs.IEV1.Vint = nteh_EBPoffset_prev();
    cdb.gen(&cs);                             // LEA  ECX,contextsym

    cdb.genc2(0x68,0,index);                      // PUSH index
    cdb.gen1(0x50 + reg);                         // PUSH ECX

#if MARS
    //cdb.gencs(0xB8+AX,0,FLextern,nteh_scopetable());    // MOV EAX,&scope_table
    cdb.gencs(0x68,0,FLextern,nteh_scopetable());         // PUSH &scope_table

    cdb.gencs(0xE8,0,FLfunc,getRtlsym(local_unwind));        // CALL __d_local_unwind2()
    cdb.append(cod3_stackadj(NULL, -12));
#else
    cdb.gencs(0xE8,0,FLfunc,getRtlsym(local_unwind));        // CALL __local_unwind2()
    cdb.append(cod3_stackadj(NULL, -8));
#endif

    CodeBuilder cdb1(cs1);
    CodeBuilder cdb2(cs2);
    cdb1.append(cdb, cdb2);
    return cdb1.finish();
}

Example #2

File: nteh.c Project: spott/dmd

code *nteh_unwind(regm_t retregs,unsigned index)
{   code *c;
    code cs;
    code *cs1;
    code *cs2;
    regm_t desregs;
    int reg;
    int local_unwind;

    // Shouldn't this always be CX?
#if SCPP
    reg = AX;
#else
    reg = CX;
#endif

#if MARS
    local_unwind = RTLSYM_D_LOCAL_UNWIND2;
#else
    local_unwind = RTLSYM_LOCAL_UNWIND2;
#endif
    desregs = (~rtlsym[local_unwind]->Sregsaved & (ALLREGS)) | mask[reg];
    gensaverestore(retregs & desregs,&cs1,&cs2);

    c = getregs(desregs);

    cs.Iop = 0x8D;
    cs.Irm = modregrm(2,reg,BPRM);
    cs.Iflags = 0;
    cs.Irex = 0;
    cs.IFL1 = FLconst;
    // EBP offset of __context.prev
    cs.IEV1.Vint = nteh_EBPoffset_prev();
    c = gen(c,&cs);                             // LEA  ECX,contextsym

    genc2(c,0x68,0,index);                      // PUSH index
    gen1(c,0x50 + reg);                         // PUSH ECX

#if MARS
    //gencs(c,0xB8+AX,0,FLextern,nteh_scopetable());    // MOV EAX,&scope_table
    gencs(c,0x68,0,FLextern,nteh_scopetable());         // PUSH &scope_table

    gencs(c,0xE8,0,FLfunc,rtlsym[local_unwind]);        // CALL __d_local_unwind2()
    genc2(c,0x81,modregrm(3,0,SP),12);                  // ADD ESP,12
#else
    gencs(c,0xE8,0,FLfunc,rtlsym[local_unwind]);        // CALL __local_unwind2()
    genc2(c,0x81,modregrm(3,0,SP),8);                   // ADD ESP,8
#endif

    c = cat4(cs1,c,cs2,NULL);
    return c;
}

Example #3

File: nteh.c Project: klickverbot/dmd

code *nteh_epilog()
{
    if (config.exe != EX_WIN32)
        return NULL;

    /* Generate:
        mov     ECX,__context[EBP].prev
        mov     FS:__except_list,ECX
     */
    code cs;
    CodeBuilder cdb;
    unsigned reg;

#if MARS
    reg = CX;
#else
    reg = (tybasic(funcsym_p->Stype->Tnext->Tty) == TYvoid) ? AX : CX;
#endif
    useregs(mask[reg]);

    cs.Iop = 0x8B;
    cs.Irm = modregrm(2,reg,BPRM);
    cs.Iflags = 0;
    cs.Irex = 0;
    cs.IFL1 = FLconst;
    // EBP offset of __context.prev
    cs.IEV1.Vint = nteh_EBPoffset_prev();
    cdb.gen(&cs);

    cs.Iop = 0x89;
    cs.Irm = modregrm(0,reg,BPRM);
    cs.Iflags |= CFfs;
    cs.IFL1 = FLextern;
    cs.IEVsym1 = getRtlsym(RTLSYM_EXCEPT_LIST);
    cs.IEVoffset1 = 0;
    cdb.gen(&cs);
    return cdb.finish();
}

Example #4

File: nteh.c Project: spott/dmd

code *nteh_epilog()
{
    if (!(config.flags2 & CFG2seh))
        return NULL;

    /* Generate:
        mov     ECX,__context[EBP].prev
        mov     FS:__except_list,ECX
     */
    code cs;
    code *c;
    unsigned reg;

#if MARS
    reg = CX;
#else
    reg = (tybasic(funcsym_p->Stype->Tnext->Tty) == TYvoid) ? AX : CX;
#endif
    useregs(mask[reg]);

    cs.Iop = 0x8B;
    cs.Irm = modregrm(2,reg,BPRM);
    cs.Iflags = 0;
    cs.Irex = 0;
    cs.IFL1 = FLconst;
    // EBP offset of __context.prev
    cs.IEV1.Vint = nteh_EBPoffset_prev();
    c = gen(CNIL,&cs);

    cs.Iop = 0x89;
    cs.Irm = modregrm(0,reg,BPRM);
    cs.Iflags |= CFfs;
    cs.IFL1 = FLextern;
    cs.IEVsym1 = rtlsym[RTLSYM_EXCEPT_LIST];
    cs.IEVoffset1 = 0;
    return gen(c,&cs);
}