[p5sagit/p5-mst-13.2.git] / ext / ByteLoader / bytecode.h

typedef char *pvcontents;
typedef char *strconst;
typedef U32 PV;
typedef char *op_tr_array;
typedef int comment_t;
typedef SV *svindex;
typedef OP *opindex;
typedef char *pvindex;
typedef IV IV64;

#define BGET_FREAD(argp, len, nelem)	\
	 bl_read(bstate->bs_fdata,(char*)(argp),(len),(nelem))
#define BGET_FGETC() bl_getc(bstate->bs_fdata)

#define BGET_U32(arg)	\
	BGET_FREAD(&arg, sizeof(U32), 1)
#define BGET_I32(arg)	\
	BGET_FREAD(&arg, sizeof(I32), 1)
#define BGET_U16(arg)	\
	BGET_FREAD(&arg, sizeof(U16), 1)
#define BGET_U8(arg)	arg = BGET_FGETC()

#define BGET_PV(arg)	STMT_START {					\
	BGET_U32(arg);							\
	if (arg) {							\
	    New(666, bstate->bs_pv.xpv_pv, arg, char);			\
	    bl_read(bstate->bs_fdata, (void*)bstate->bs_pv.xpv_pv, arg, 1);	\
	    bstate->bs_pv.xpv_len = arg;				\
	    bstate->bs_pv.xpv_cur = arg - 1;				\
	} else {							\
	    bstate->bs_pv.xpv_pv = 0;					\
	    bstate->bs_pv.xpv_len = 0;					\
	    bstate->bs_pv.xpv_cur = 0;					\
	}								\
    } STMT_END

#ifdef BYTELOADER_LOG_COMMENTS
#  define BGET_comment_t(arg) \
    STMT_START {							\
	char buf[1024];							\
	int i = 0;							\
	do {								\
	    arg = BGET_FGETC();						\
	    buf[i++] = (char)arg;					\
	} while (arg != '\n' && arg != EOF);				\
	buf[i] = '\0';							\
	PerlIO_printf(PerlIO_stderr(), "%s", buf);			\
    } STMT_END
#else
#  define BGET_comment_t(arg) \
	do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
#endif

/*
 * In the following, sizeof(IV)*4 is just a way of encoding 32 on 64-bit-IV
 * machines such that 32-bit machine compilers don't whine about the shift
 * count being too high even though the code is never reached there.
 */
#define BGET_IV64(arg) STMT_START {			\
	U32 hi, lo;					\
	BGET_U32(hi);					\
	BGET_U32(lo);					\
	if (sizeof(IV) == 8)				\
	    arg = ((IV)hi << (sizeof(IV)*4) | (IV)lo);	\
	else if (((I32)hi == -1 && (I32)lo < 0)		\
		 || ((I32)hi == 0 && (I32)lo >= 0)) {	\
	    arg = (I32)lo;				\
	}						\
	else {						\
	    bstate->bs_iv_overflows++;			\
	    arg = 0;					\
	}						\
    } STMT_END

#if IVSIZE == 4
#   define BGET_IV(arg) BGET_I32(arg)
#else
#   if IVSIZE == 8
#       define BGET_IV(arg) BGET_IV64(arg)
#   endif
#endif

#define BGET_op_tr_array(arg) do {			\
	unsigned short *ary;				\
	New(666, ary, 256, unsigned short);		\
	BGET_FREAD(ary, sizeof(unsigned short), 256);	\
	arg = (char *) ary;				\
    } while (0)

#define BGET_pvcontents(arg)	arg = bstate->bs_pv.xpv_pv
#define BGET_strconst(arg) STMT_START {	\
	for (arg = PL_tokenbuf; (*arg = BGET_FGETC()); arg++) /* nothing */; \
	arg = PL_tokenbuf;			\
    } STMT_END

#define BGET_NV(arg) STMT_START {	\
	char *str;			\
	BGET_strconst(str);		\
	arg = Atof(str);		\
    } STMT_END

#define BGET_objindex(arg, type) STMT_START {	\
	BGET_U32(ix);				\
	arg = (type)bstate->bs_obj_list[ix];	\
    } STMT_END
#define BGET_svindex(arg) BGET_objindex(arg, svindex)
#define BGET_opindex(arg) BGET_objindex(arg, opindex)
#define BGET_pvindex(arg) STMT_START {			\
	BGET_objindex(arg, pvindex);			\
	arg = arg ? savepv(arg) : arg;			\
    } STMT_END

#define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
#define BSET_stpv(pv, arg) STMT_START {		\
	BSET_OBJ_STORE(pv, arg);		\
	SAVEFREEPV(pv);				\
    } STMT_END
				    
#define BSET_sv_refcnt_add(svrefcnt, arg)	svrefcnt += arg
#define BSET_gp_refcnt_add(gprefcnt, arg)	gprefcnt += arg
#define BSET_gp_share(sv, arg) STMT_START {	\
	gp_free((GV*)sv);			\
	GvGP(sv) = GvGP(arg);			\
    } STMT_END

#define BSET_gv_fetchpv(sv, arg)	sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
#define BSET_gv_stashpv(sv, arg)	sv = (SV*)gv_stashpv(arg, TRUE)
#define BSET_sv_magic(sv, arg)		sv_magic(sv, Nullsv, arg, 0, 0)
#define BSET_mg_pv(mg, arg)	mg->mg_ptr = arg; mg->mg_len = bstate->bs_pv.xpv_cur
#define BSET_sv_upgrade(sv, arg)	(void)SvUPGRADE(sv, arg)
#define BSET_xpv(sv)	do {	\
	SvPV_set(sv, bstate->bs_pv.xpv_pv);	\
	SvCUR_set(sv, bstate->bs_pv.xpv_cur);	\
	SvLEN_set(sv, bstate->bs_pv.xpv_len);	\
    } while (0)
#define BSET_av_extend(sv, arg)	av_extend((AV*)sv, arg)

#define BSET_av_push(sv, arg)	av_push((AV*)sv, arg)
#define BSET_hv_store(sv, arg)	\
	hv_store((HV*)sv, bstate->bs_pv.xpv_pv, bstate->bs_pv.xpv_cur, arg, 0)
#define BSET_pv_free(pv)	Safefree(pv.xpv_pv)
#define BSET_pregcomp(o, arg) \
	STMT_START { \
		PM_SETRE(((PMOP*)o), (arg ? \
        	         CALLREGCOMP(aTHX_ arg, arg + bstate->bs_pv.xpv_cur, ((PMOP*)o)) : 0)); \
	} STMT_END
#define BSET_newsv(sv, arg)				\
	STMT_START {					\
	    sv = (arg == SVt_PVAV ? (SV*)newAV() :	\
		  arg == SVt_PVHV ? (SV*)newHV() :	\
		  NEWSV(666,0));			\
	    SvUPGRADE(sv, arg);				\
	} STMT_END
#define BSET_newop(o, arg)	((o = (OP*)safemalloc(optype_size[arg])), \
				 memzero((char*)o,optype_size[arg]))
#define BSET_newopn(o, arg) STMT_START {	\
	OP *oldop = o;				\
	BSET_newop(o, arg);			\
	oldop->op_next = o;			\
    } STMT_END

#define BSET_ret(foo) STMT_START {			\
	Safefree(bstate->bs_obj_list);			\
	return;						\
    } STMT_END

/*
 * Kludge special-case workaround for OP_MAPSTART
 * which needs the ppaddr for OP_GREPSTART. Blech.
 */
#define BSET_op_type(o, arg) STMT_START {	\
	o->op_type = arg;			\
	if (arg == OP_MAPSTART)			\
	    arg = OP_GREPSTART;			\
	o->op_ppaddr = PL_ppaddr[arg];		\
    } STMT_END
#define BSET_op_ppaddr(o, arg) Perl_croak(aTHX_ "op_ppaddr not yet implemented")
#define BSET_curpad(pad, arg) STMT_START {	\
	PL_comppad = (AV *)arg;			\
	pad = AvARRAY(arg);			\
    } STMT_END
/* this works now that Sarathy's changed the CopFILE_set macro to do the SvREFCNT_inc()
	-- BKS 6-2-2000 */
#define BSET_cop_file(cop, arg)		CopFILE_set(cop,arg)
#define BSET_cop_line(cop, arg)		CopLINE_set(cop,arg)
#define BSET_cop_stashpv(cop, arg)	CopSTASHPV_set(cop,arg)

/* this is simply stolen from the code in newATTRSUB() */
#define BSET_push_begin(ary,cv)				\
	STMT_START {					\
	    I32 oldscope = PL_scopestack_ix;		\
	    ENTER;					\
	    SAVECOPFILE(&PL_compiling);			\
	    SAVECOPLINE(&PL_compiling);			\
	    if (!PL_beginav)				\
		PL_beginav = newAV();			\
	    av_push(PL_beginav, cv);			\
	    call_list(oldscope, PL_beginav);		\
	    PL_curcop = &PL_compiling;			\
	    PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);\
	    LEAVE;					\
	} STMT_END
#define BSET_push_init(ary,cv)								\
	STMT_START {									\
	    av_unshift((PL_initav ? PL_initav : (PL_initav = newAV(), PL_initav)), 1); 	\
	    av_store(PL_initav, 0, cv);							\
	} STMT_END
#define BSET_push_end(ary,cv)									\
	STMT_START {									\
	    av_unshift((PL_endav ? PL_endav : (PL_endav = newAV(), PL_endav)), 1);	\
	    av_store(PL_endav, 0, cv);							\
	} STMT_END
#define BSET_OBJ_STORE(obj, ix)			\
	(I32)ix > bstate->bs_obj_list_fill ?	\
	bset_obj_store(aTHX_ bstate, obj, (I32)ix) : (bstate->bs_obj_list[ix] = obj)

/* NOTE: the bytecode header only sanity-checks the bytecode. If a script cares about
 * what version of Perl it's being called under, it should do a 'use 5.006_001' or
 * equivalent. However, since the header includes checks requiring an exact match in
 * ByteLoader versions (we can't guarantee forward compatibility), you don't 
 * need to specify one:
 * 	use ByteLoader;
 * is all you need.
 *	-- BKS, June 2000
*/

#define HEADER_FAIL(f)	\
	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f)
#define HEADER_FAIL1(f, arg1)	\
	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1)
#define HEADER_FAIL2(f, arg1, arg2)	\
	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1, arg2)

#define BYTECODE_HEADER_CHECK					\
	STMT_START {						\
	    U32 sz = 0;						\
	    strconst str;					\
								\
	    BGET_U32(sz); /* Magic: 'PLBC' */			\
	    if (sz != 0x43424c50) {				\
		HEADER_FAIL1("bad magic (want 0x43424c50, got %#x)", (int)sz);		\
	    }							\
	    BGET_strconst(str);	/* archname */			\
	    if (strNE(str, ARCHNAME)) {				\
		HEADER_FAIL2("wrong architecture (want %s, you have %s)",str,ARCHNAME);	\
	    }							\
	    BGET_strconst(str); /* ByteLoader version */	\
	    if (strNE(str, VERSION)) {				\
		HEADER_FAIL2("mismatched ByteLoader versions (want %s, you have %s)",	\
			str, VERSION);				\
	    }							\
	    BGET_U32(sz); /* ivsize */				\
	    if (sz != IVSIZE) {					\
		HEADER_FAIL("different IVSIZE");		\
	    }							\
	    BGET_U32(sz); /* ptrsize */				\
	    if (sz != PTRSIZE) {				\
		HEADER_FAIL("different PTRSIZE");		\
	    }							\
	    BGET_strconst(str); /* byteorder */			\
	    if (strNE(str, STRINGIFY(BYTEORDER))) {		\
		HEADER_FAIL("different byteorder");	\
	    }							\
	} STMT_END
Commit	Line	Data
e8edd1e6	1	typedef char *pvcontents;
	2	typedef char *strconst;
	3	typedef U32 PV;
	4	typedef char *op_tr_array;
	5	typedef int comment_t;
	6	typedef SV *svindex;
	7	typedef OP *opindex;
059a8bb7	8	typedef char *pvindex;
e8edd1e6	9	typedef IV IV64;
	10
	11	#define BGET_FREAD(argp, len, nelem) \
059a8bb7	12	bl_read(bstate->bs_fdata,(char*)(argp),(len),(nelem))
059a8bb7	13	#define BGET_FGETC() bl_getc(bstate->bs_fdata)
e8edd1e6	14
e8edd1e6	15	#define BGET_U32(arg) \
059a8bb7	16	BGET_FREAD(&arg, sizeof(U32), 1)
e8edd1e6	17	#define BGET_I32(arg) \
059a8bb7	18	BGET_FREAD(&arg, sizeof(I32), 1)
e8edd1e6	19	#define BGET_U16(arg) \
059a8bb7	20	BGET_FREAD(&arg, sizeof(U16), 1)
e8edd1e6	21	#define BGET_U8(arg) arg = BGET_FGETC()
e8edd1e6	22
059a8bb7	23	#define BGET_PV(arg) STMT_START { \
	24	BGET_U32(arg); \
	25	if (arg) { \
	26	New(666, bstate->bs_pv.xpv_pv, arg, char); \
	27	bl_read(bstate->bs_fdata, (void*)bstate->bs_pv.xpv_pv, arg, 1); \
	28	bstate->bs_pv.xpv_len = arg; \
	29	bstate->bs_pv.xpv_cur = arg - 1; \
	30	} else { \
	31	bstate->bs_pv.xpv_pv = 0; \
	32	bstate->bs_pv.xpv_len = 0; \
	33	bstate->bs_pv.xpv_cur = 0; \
	34	} \
e8edd1e6	35	} STMT_END
e8edd1e6	36
fc290457	37	#ifdef BYTELOADER_LOG_COMMENTS
	38	# define BGET_comment_t(arg) \
	39	STMT_START { \
	40	char buf[1024]; \
	41	int i = 0; \
	42	do { \
	43	arg = BGET_FGETC(); \
	44	buf[i++] = (char)arg; \
	45	} while (arg != '\n' && arg != EOF); \
	46	buf[i] = '\0'; \
	47	PerlIO_printf(PerlIO_stderr(), "%s", buf); \
	48	} STMT_END
	49	#else
	50	# define BGET_comment_t(arg) \
e8edd1e6	51	do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
fc290457	52	#endif
e8edd1e6	53
	54	/*
	55	* In the following, sizeof(IV)*4 is just a way of encoding 32 on 64-bit-IV
	56	* machines such that 32-bit machine compilers don't whine about the shift
	57	* count being too high even though the code is never reached there.
	58	*/
	59	#define BGET_IV64(arg) STMT_START { \
	60	U32 hi, lo; \
	61	BGET_U32(hi); \
	62	BGET_U32(lo); \
	63	if (sizeof(IV) == 8) \
42718184	64	arg = ((IV)hi << (sizeof(IV)*4) \| (IV)lo); \
e8edd1e6	65	else if (((I32)hi == -1 && (I32)lo < 0) \
	66	\|\| ((I32)hi == 0 && (I32)lo >= 0)) { \
	67	arg = (I32)lo; \
	68	} \
	69	else { \
059a8bb7	70	bstate->bs_iv_overflows++; \
e8edd1e6	71	arg = 0; \
	72	} \
	73	} STMT_END
	74
78c6a0b0	75	#if IVSIZE == 4
	76	# define BGET_IV(arg) BGET_I32(arg)
	77	#else
	78	# if IVSIZE == 8
	79	# define BGET_IV(arg) BGET_IV64(arg)
	80	# endif
	81	#endif
	82
059a8bb7	83	#define BGET_op_tr_array(arg) do { \
059a8bb7	84	unsigned short *ary; \
059a8bb7	85	New(666, ary, 256, unsigned short); \
	86	BGET_FREAD(ary, sizeof(unsigned short), 256); \
	87	arg = (char *) ary; \
e8edd1e6	88	} while (0)
e8edd1e6	89
059a8bb7	90	#define BGET_pvcontents(arg) arg = bstate->bs_pv.xpv_pv
e8edd1e6	91	#define BGET_strconst(arg) STMT_START { \
	92	for (arg = PL_tokenbuf; (arg = BGET_FGETC()); arg++) / nothing */; \
	93	arg = PL_tokenbuf; \
	94	} STMT_END
	95
cad2e5aa	96	#define BGET_NV(arg) STMT_START { \
e8edd1e6	97	char *str; \
e8edd1e6	98	BGET_strconst(str); \
ac26f109	99	arg = Atof(str); \
e8edd1e6	100	} STMT_END
	101
	102	#define BGET_objindex(arg, type) STMT_START { \
e8edd1e6	103	BGET_U32(ix); \
059a8bb7	104	arg = (type)bstate->bs_obj_list[ix]; \
e8edd1e6	105	} STMT_END
	106	#define BGET_svindex(arg) BGET_objindex(arg, svindex)
	107	#define BGET_opindex(arg) BGET_objindex(arg, opindex)
059a8bb7	108	#define BGET_pvindex(arg) STMT_START { \
	109	BGET_objindex(arg, pvindex); \
	110	arg = arg ? savepv(arg) : arg; \
	111	} STMT_END
e8edd1e6	112
e8edd1e6	113	#define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
059a8bb7	114	#define BSET_stpv(pv, arg) STMT_START { \
	115	BSET_OBJ_STORE(pv, arg); \
	116	SAVEFREEPV(pv); \
	117	} STMT_END
e8edd1e6	118
	119	#define BSET_sv_refcnt_add(svrefcnt, arg) svrefcnt += arg
	120	#define BSET_gp_refcnt_add(gprefcnt, arg) gprefcnt += arg
	121	#define BSET_gp_share(sv, arg) STMT_START { \
	122	gp_free((GV*)sv); \
	123	GvGP(sv) = GvGP(arg); \
	124	} STMT_END
	125
	126	#define BSET_gv_fetchpv(sv, arg) sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
	127	#define BSET_gv_stashpv(sv, arg) sv = (SV*)gv_stashpv(arg, TRUE)
	128	#define BSET_sv_magic(sv, arg) sv_magic(sv, Nullsv, arg, 0, 0)
059a8bb7	129	#define BSET_mg_pv(mg, arg) mg->mg_ptr = arg; mg->mg_len = bstate->bs_pv.xpv_cur
e8edd1e6	130	#define BSET_sv_upgrade(sv, arg) (void)SvUPGRADE(sv, arg)
e8edd1e6	131	#define BSET_xpv(sv) do { \
059a8bb7	132	SvPV_set(sv, bstate->bs_pv.xpv_pv); \
	133	SvCUR_set(sv, bstate->bs_pv.xpv_cur); \
	134	SvLEN_set(sv, bstate->bs_pv.xpv_len); \
e8edd1e6	135	} while (0)
	136	#define BSET_av_extend(sv, arg) av_extend((AV*)sv, arg)
	137
	138	#define BSET_av_push(sv, arg) av_push((AV*)sv, arg)
	139	#define BSET_hv_store(sv, arg) \
059a8bb7	140	hv_store((HV*)sv, bstate->bs_pv.xpv_pv, bstate->bs_pv.xpv_cur, arg, 0)
e8edd1e6	141	#define BSET_pv_free(pv) Safefree(pv.xpv_pv)
e8edd1e6	142	#define BSET_pregcomp(o, arg) \
e357fc91	143	STMT_START { \
	144	PM_SETRE(((PMOP*)o), (arg ? \
	145	CALLREGCOMP(aTHX_ arg, arg + bstate->bs_pv.xpv_cur, ((PMOP*)o)) : 0)); \
	146	} STMT_END
059a8bb7	147	#define BSET_newsv(sv, arg) \
	148	STMT_START { \
	149	sv = (arg == SVt_PVAV ? (SV*)newAV() : \
	150	arg == SVt_PVHV ? (SV*)newHV() : \
	151	NEWSV(666,0)); \
	152	SvUPGRADE(sv, arg); \
	153	} STMT_END
fc290457	154	#define BSET_newop(o, arg) ((o = (OP*)safemalloc(optype_size[arg])), \
fc290457	155	memzero((char*)o,optype_size[arg]))
e8edd1e6	156	#define BSET_newopn(o, arg) STMT_START { \
	157	OP *oldop = o; \
	158	BSET_newop(o, arg); \
	159	oldop->op_next = o; \
	160	} STMT_END
	161
059a8bb7	162	#define BSET_ret(foo) STMT_START { \
	163	Safefree(bstate->bs_obj_list); \
	164	return; \
	165	} STMT_END
e8edd1e6	166
	167	/*
	168	* Kludge special-case workaround for OP_MAPSTART
	169	* which needs the ppaddr for OP_GREPSTART. Blech.
	170	*/
	171	#define BSET_op_type(o, arg) STMT_START { \
	172	o->op_type = arg; \
	173	if (arg == OP_MAPSTART) \
	174	arg = OP_GREPSTART; \
	175	o->op_ppaddr = PL_ppaddr[arg]; \
	176	} STMT_END
cea2e8a9	177	#define BSET_op_ppaddr(o, arg) Perl_croak(aTHX_ "op_ppaddr not yet implemented")
e8edd1e6	178	#define BSET_curpad(pad, arg) STMT_START { \
	179	PL_comppad = (AV *)arg; \
	180	pad = AvARRAY(arg); \
	181	} STMT_END
059a8bb7	182	/* this works now that Sarathy's changed the CopFILE_set macro to do the SvREFCNT_inc()
059a8bb7	183	-- BKS 6-2-2000 */
11faa288	184	#define BSET_cop_file(cop, arg) CopFILE_set(cop,arg)
	185	#define BSET_cop_line(cop, arg) CopLINE_set(cop,arg)
	186	#define BSET_cop_stashpv(cop, arg) CopSTASHPV_set(cop,arg)
e8edd1e6	187
059a8bb7	188	/* this is simply stolen from the code in newATTRSUB() */
	189	#define BSET_push_begin(ary,cv) \
	190	STMT_START { \
	191	I32 oldscope = PL_scopestack_ix; \
	192	ENTER; \
	193	SAVECOPFILE(&PL_compiling); \
	194	SAVECOPLINE(&PL_compiling); \
059a8bb7	195	if (!PL_beginav) \
	196	PL_beginav = newAV(); \
	197	av_push(PL_beginav, cv); \
	198	call_list(oldscope, PL_beginav); \
	199	PL_curcop = &PL_compiling; \
6e21dc91	200	PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);\
059a8bb7	201	LEAVE; \
	202	} STMT_END
	203	#define BSET_push_init(ary,cv) \
	204	STMT_START { \
	205	av_unshift((PL_initav ? PL_initav : (PL_initav = newAV(), PL_initav)), 1); \
	206	av_store(PL_initav, 0, cv); \
	207	} STMT_END
	208	#define BSET_push_end(ary,cv) \
	209	STMT_START { \
	210	av_unshift((PL_endav ? PL_endav : (PL_endav = newAV(), PL_endav)), 1); \
	211	av_store(PL_endav, 0, cv); \
	212	} STMT_END
	213	#define BSET_OBJ_STORE(obj, ix) \
	214	(I32)ix > bstate->bs_obj_list_fill ? \
acfe0abc	215	bset_obj_store(aTHX_ bstate, obj, (I32)ix) : (bstate->bs_obj_list[ix] = obj)
059a8bb7	216
059a8bb7	217	/* NOTE: the bytecode header only sanity-checks the bytecode. If a script cares about
3b825e41	218	* what version of Perl it's being called under, it should do a 'use 5.006_001' or
059a8bb7	219	* equivalent. However, since the header includes checks requiring an exact match in
	220	* ByteLoader versions (we can't guarantee forward compatibility), you don't
	221	* need to specify one:
	222	* use ByteLoader;
	223	* is all you need.
	224	* -- BKS, June 2000
	225	*/
	226
d2560b70	227	#define HEADER_FAIL(f) \
	228	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f)
	229	#define HEADER_FAIL1(f, arg1) \
	230	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1)
	231	#define HEADER_FAIL2(f, arg1, arg2) \
059a8bb7	232	Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1, arg2)
	233
	234	#define BYTECODE_HEADER_CHECK \
	235	STMT_START { \
	236	U32 sz = 0; \
	237	strconst str; \
	238	\
	239	BGET_U32(sz); /* Magic: 'PLBC' */ \
	240	if (sz != 0x43424c50) { \
d2560b70	241	HEADER_FAIL1("bad magic (want 0x43424c50, got %#x)", (int)sz); \
059a8bb7	242	} \
	243	BGET_strconst(str); /* archname */ \
	244	if (strNE(str, ARCHNAME)) { \
d2560b70	245	HEADER_FAIL2("wrong architecture (want %s, you have %s)",str,ARCHNAME); \
059a8bb7	246	} \
	247	BGET_strconst(str); /* ByteLoader version */ \
	248	if (strNE(str, VERSION)) { \
d2560b70	249	HEADER_FAIL2("mismatched ByteLoader versions (want %s, you have %s)", \
059a8bb7	250	str, VERSION); \
	251	} \
	252	BGET_U32(sz); /* ivsize */ \
	253	if (sz != IVSIZE) { \
d2560b70	254	HEADER_FAIL("different IVSIZE"); \
059a8bb7	255	} \
	256	BGET_U32(sz); /* ptrsize */ \
	257	if (sz != PTRSIZE) { \
d2560b70	258	HEADER_FAIL("different PTRSIZE"); \
059a8bb7	259	} \
	260	BGET_strconst(str); /* byteorder */ \
	261	if (strNE(str, STRINGIFY(BYTEORDER))) { \
d2560b70	262	HEADER_FAIL("different byteorder"); \
059a8bb7	263	} \
059a8bb7	264	} STMT_END