source: vendor/perl/5.8.8/bytecode.pl@ 3883

Last change on this file since 3883 was 3181, checked in by bird, 18 years ago

perl 5.8.8

File size: 14.2 KB
Line 
1BEGIN {
2 push @INC, './lib';
3 require 'regen_lib.pl';
4}
5use strict;
6my %alias_to = (
7 U32 => [qw(line_t)],
8 PADOFFSET => [qw(STRLEN SSize_t)],
9 U16 => [qw(OPCODE short)],
10 U8 => [qw(char)],
11);
12
13my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
14
15# Nullsv *must* come first in the following so that the condition
16# ($$sv == 0) can continue to be used to test (sv == Nullsv).
17my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE);
18
19my (%alias_from, $from, $tos);
20while (($from, $tos) = each %alias_to) {
21 map { $alias_from{$_} = $from } @$tos;
22}
23
24my $c_header = <<'EOT';
25/* -*- buffer-read-only: t -*-
26 *
27 * Copyright (c) 1996-1999 Malcolm Beattie
28 *
29 * You may distribute under the terms of either the GNU General Public
30 * License or the Artistic License, as specified in the README file.
31 *
32 */
33/*
34 * This file is autogenerated from bytecode.pl. Changes made here will be lost.
35 */
36EOT
37
38my $perl_header;
39($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
40
41safer_unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";
42
43#
44# Start with boilerplate for Asmdata.pm
45#
46open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
47binmode ASMDATA_PM;
48print ASMDATA_PM $perl_header, <<'EOT';
49package B::Asmdata;
50
51our $VERSION = '1.01';
52
53use Exporter;
54@ISA = qw(Exporter);
55@EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
56our(%insn_data, @insn_name, @optype, @specialsv_name);
57
58EOT
59print ASMDATA_PM <<"EOT";
60\@optype = qw(@optype);
61\@specialsv_name = qw(@specialsv);
62
63# XXX insn_data is initialised this way because with a large
64# %insn_data = (foo => [...], bar => [...], ...) initialiser
65# I get a hard-to-track-down stack underflow and segfault.
66EOT
67
68#
69# Boilerplate for byterun.c
70#
71open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
72binmode BYTERUN_C;
73print BYTERUN_C $c_header, <<'EOT';
74
75#define PERL_NO_GET_CONTEXT
76#include "EXTERN.h"
77#include "perl.h"
78#define NO_XSLOCKS
79#include "XSUB.h"
80
81#include "byterun.h"
82#include "bytecode.h"
83
84
85static const int optype_size[] = {
86EOT
87my $i = 0;
88for ($i = 0; $i < @optype - 1; $i++) {
89 printf BYTERUN_C " sizeof(%s),\n", $optype[$i], $i;
90}
91printf BYTERUN_C " sizeof(%s)\n", $optype[$i], $i;
92print BYTERUN_C <<'EOT';
93};
94
95void *
96bset_obj_store(pTHX_ struct byteloader_state *bstate, void *obj, I32 ix)
97{
98 if (ix > bstate->bs_obj_list_fill) {
99 Renew(bstate->bs_obj_list, ix + 32, void*);
100 bstate->bs_obj_list_fill = ix + 31;
101 }
102 bstate->bs_obj_list[ix] = obj;
103 return obj;
104}
105
106int
107byterun(pTHX_ register struct byteloader_state *bstate)
108{
109 register int insn;
110 U32 ix;
111 SV *specialsv_list[6];
112
113 BYTECODE_HEADER_CHECK; /* croak if incorrect platform */
114 Newx(bstate->bs_obj_list, 32, void*); /* set op objlist */
115 bstate->bs_obj_list_fill = 31;
116 bstate->bs_obj_list[0] = NULL; /* first is always Null */
117 bstate->bs_ix = 1;
118
119EOT
120
121for my $i ( 0 .. $#specialsv ) {
122 print BYTERUN_C " specialsv_list[$i] = $specialsv[$i];\n";
123}
124
125print BYTERUN_C <<'EOT';
126
127 while ((insn = BGET_FGETC()) != EOF) {
128 switch (insn) {
129EOT
130
131
132my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);
133
134while (<DATA>) {
135 if (/^\s*#/) {
136 print BYTERUN_C if /^\s*#\s*(?:if|endif|el)/;
137 next;
138 }
139 chop;
140 next unless length;
141 if (/^%number\s+(.*)/) {
142 $insn_num = $1;
143 next;
144 } elsif (/%enum\s+(.*?)\s+(.*)/) {
145 create_enum($1, $2); # must come before instructions
146 next;
147 }
148 ($insn, $lvalue, $argtype, $flags) = split;
149 my $rvalcast = '';
150 if ($argtype =~ m:(.+)/(.+):) {
151 ($rvalcast, $argtype) = ("($1)", $2);
152 }
153 $insn_name[$insn_num] = $insn;
154 $fundtype = $alias_from{$argtype} || $argtype;
155
156 #
157 # Add the case statement and code for the bytecode interpreter in byterun.c
158 #
159 printf BYTERUN_C "\t case INSN_%s:\t\t/* %d */\n\t {\n",
160 uc($insn), $insn_num;
161 my $optarg = $argtype eq "none" ? "" : ", arg";
162 if ($optarg) {
163 printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
164 }
165 if ($flags =~ /x/) {
166 print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
167 } elsif ($flags =~ /s/) {
168 # Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
169 print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
170 }
171 elsif ($optarg && $lvalue ne "none") {
172 print BYTERUN_C "\t\t$lvalue = ${rvalcast}arg;\n";
173 }
174 print BYTERUN_C "\t\tbreak;\n\t }\n";
175
176 #
177 # Add the initialiser line for %insn_data in Asmdata.pm
178 #
179 print ASMDATA_PM <<"EOT";
180\$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
181EOT
182
183 # Find the next unused instruction number
184 do { $insn_num++ } while $insn_name[$insn_num];
185}
186
187#
188# Finish off byterun.c
189#
190print BYTERUN_C <<'EOT';
191 default:
192 Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
193 /* NOTREACHED */
194 }
195 }
196 return 0;
197}
198
199/* ex: set ro: */
200EOT
201
202#
203# Write the instruction and optype enum constants into byterun.h
204#
205open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
206binmode BYTERUN_H;
207print BYTERUN_H $c_header, <<'EOT';
208struct byteloader_fdata {
209 SV *datasv;
210 int next_out;
211 int idx;
212};
213
214struct byteloader_state {
215 struct byteloader_fdata *bs_fdata;
216 SV *bs_sv;
217 void **bs_obj_list;
218 int bs_obj_list_fill;
219 int bs_ix;
220 XPV bs_pv;
221 int bs_iv_overflows;
222};
223
224int bl_getc(struct byteloader_fdata *);
225int bl_read(struct byteloader_fdata *, char *, size_t, size_t);
226extern int byterun(pTHX_ struct byteloader_state *);
227
228enum {
229EOT
230
231my $add_enum_value = 0;
232my $max_insn;
233for $i ( 0 .. $#insn_name ) {
234 $insn = uc($insn_name[$i]);
235 if (defined($insn)) {
236 $max_insn = $i;
237 if ($add_enum_value) {
238 print BYTERUN_H " INSN_$insn = $i,\t\t\t/* $i */\n";
239 $add_enum_value = 0;
240 } else {
241 print BYTERUN_H " INSN_$insn,\t\t\t/* $i */\n";
242 }
243 } else {
244 $add_enum_value = 1;
245 }
246}
247
248print BYTERUN_H " MAX_INSN = $max_insn\n};\n";
249
250print BYTERUN_H "\nenum {\n";
251for ($i = 0; $i < @optype - 1; $i++) {
252 printf BYTERUN_H " OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
253}
254printf BYTERUN_H " OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;
255
256print BYTERUN_H "/* ex: set ro: */\n";
257
258#
259# Finish off insn_data and create array initialisers in Asmdata.pm
260#
261print ASMDATA_PM <<'EOT';
262
263my ($insn_name, $insn_data);
264while (($insn_name, $insn_data) = each %insn_data) {
265 $insn_name[$insn_data->[0]] = $insn_name;
266}
267# Fill in any gaps
268@insn_name = map($_ || "unused", @insn_name);
269
2701;
271
272__END__
273
274=head1 NAME
275
276B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode
277
278=head1 SYNOPSIS
279
280 use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);
281
282=head1 DESCRIPTION
283
284Provides information about Perl ops in order to generate bytecode via
285a bunch of exported variables. Its mostly used by B::Assembler and
286B::Disassembler.
287
288=over 4
289
290=item %insn_data
291
292 my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name};
293
294For a given $op_name (for example, 'cop_label', 'sv_flags', etc...)
295you get an array ref containing the bytecode number of the op, a
296reference to the subroutine used to 'PUT', and the name of the method
297used to 'GET'.
298
299=for _private
300Add more detail about what $put_sub and $get_meth are and how to use them.
301
302=item @insn_name
303
304 my $op_name = $insn_name[$bytecode_num];
305
306A simple mapping of the bytecode number to the name of the op.
307Suitable for using with %insn_data like so:
308
309 my $op_info = $insn_data{$insn_name[$bytecode_num]};
310
311=item @optype
312
313 my $op_type = $optype[$op_type_num];
314
315A simple mapping of the op type number to its type (like 'COP' or 'BINOP').
316
317=item @specialsv_name
318
319 my $sv_name = $specialsv_name[$sv_index];
320
321Certain SV types are considered 'special'. They're represented by
322B::SPECIAL and are referred to by a number from the specialsv_list.
323This array maps that number back to the name of the SV (like 'Nullsv'
324or '&PL_sv_undef').
325
326=back
327
328=head1 AUTHOR
329
330Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
331
332=cut
333
334# ex: set ro:
335EOT
336
337
338close ASMDATA_PM or die "Error closing ASMDATA_PM: $!";
339close BYTERUN_H or die "Error closing BYTERUN_H: $!";
340close BYTERUN_C or die "Error closing BYTERUN_C: $!";
341
342__END__
343# First set instruction ord("#") to read comment to end-of-line (sneaky)
344%number 35
345comment arg comment_t
346# Then make ord("\n") into a no-op
347%number 10
348nop none none
349
350# Now for the rest of the ordinary ones, beginning with \0 which is
351# ret so that \0-terminated strings can be read properly as bytecode.
352%number 0
353#
354# The argtype is either a single type or "rightvaluecast/argtype".
355#
356#opcode lvalue argtype flags
357#
358ret none none x
359ldsv bstate->bs_sv svindex
360ldop PL_op opindex
361stsv bstate->bs_sv U32 s
362stop PL_op U32 s
363stpv bstate->bs_pv.xpv_pv U32 x
364ldspecsv bstate->bs_sv U8 x
365ldspecsvx bstate->bs_sv U8 x
366newsv bstate->bs_sv U8 x
367newsvx bstate->bs_sv U32 x
368newop PL_op U8 x
369newopx PL_op U16 x
370newopn PL_op U8 x
371newpv none PV
372pv_cur bstate->bs_pv.xpv_cur STRLEN
373pv_free bstate->bs_pv none x
374sv_upgrade bstate->bs_sv U8 x
375sv_refcnt SvREFCNT(bstate->bs_sv) U32
376sv_refcnt_add SvREFCNT(bstate->bs_sv) I32 x
377sv_flags SvFLAGS(bstate->bs_sv) U32
378xrv bstate->bs_sv svindex x
379xpv bstate->bs_sv none x
380xpv_cur bstate->bs_sv STRLEN x
381xpv_len bstate->bs_sv STRLEN x
382xiv bstate->bs_sv IV x
383xnv bstate->bs_sv NV x
384xlv_targoff LvTARGOFF(bstate->bs_sv) STRLEN
385xlv_targlen LvTARGLEN(bstate->bs_sv) STRLEN
386xlv_targ LvTARG(bstate->bs_sv) svindex
387xlv_type LvTYPE(bstate->bs_sv) char
388xbm_useful BmUSEFUL(bstate->bs_sv) I32
389xbm_previous BmPREVIOUS(bstate->bs_sv) U16
390xbm_rare BmRARE(bstate->bs_sv) U8
391xfm_lines FmLINES(bstate->bs_sv) IV
392xio_lines IoLINES(bstate->bs_sv) IV
393xio_page IoPAGE(bstate->bs_sv) IV
394xio_page_len IoPAGE_LEN(bstate->bs_sv) IV
395xio_lines_left IoLINES_LEFT(bstate->bs_sv) IV
396xio_top_name IoTOP_NAME(bstate->bs_sv) pvindex
397xio_top_gv *(SV**)&IoTOP_GV(bstate->bs_sv) svindex
398xio_fmt_name IoFMT_NAME(bstate->bs_sv) pvindex
399xio_fmt_gv *(SV**)&IoFMT_GV(bstate->bs_sv) svindex
400xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv) pvindex
401xio_bottom_gv *(SV**)&IoBOTTOM_GV(bstate->bs_sv) svindex
402xio_subprocess IoSUBPROCESS(bstate->bs_sv) short
403xio_type IoTYPE(bstate->bs_sv) char
404xio_flags IoFLAGS(bstate->bs_sv) char
405xcv_xsubany *(SV**)&CvXSUBANY(bstate->bs_sv).any_ptr svindex
406xcv_stash *(SV**)&CvSTASH(bstate->bs_sv) svindex
407xcv_start CvSTART(bstate->bs_sv) opindex
408xcv_root CvROOT(bstate->bs_sv) opindex
409xcv_gv *(SV**)&CvGV(bstate->bs_sv) svindex
410xcv_file CvFILE(bstate->bs_sv) pvindex
411xcv_depth CvDEPTH(bstate->bs_sv) long
412xcv_padlist *(SV**)&CvPADLIST(bstate->bs_sv) svindex
413xcv_outside *(SV**)&CvOUTSIDE(bstate->bs_sv) svindex
414xcv_outside_seq CvOUTSIDE_SEQ(bstate->bs_sv) U32
415xcv_flags CvFLAGS(bstate->bs_sv) U16
416av_extend bstate->bs_sv SSize_t x
417av_pushx bstate->bs_sv svindex x
418av_push bstate->bs_sv svindex x
419xav_fill AvFILLp(bstate->bs_sv) SSize_t
420xav_max AvMAX(bstate->bs_sv) SSize_t
421xav_flags AvFLAGS(bstate->bs_sv) U8
422xhv_riter HvRITER(bstate->bs_sv) I32
423xhv_name bstate->bs_sv pvindex x
424xhv_pmroot *(OP**)&HvPMROOT(bstate->bs_sv) opindex
425hv_store bstate->bs_sv svindex x
426sv_magic bstate->bs_sv char x
427mg_obj SvMAGIC(bstate->bs_sv)->mg_obj svindex
428mg_private SvMAGIC(bstate->bs_sv)->mg_private U16
429mg_flags SvMAGIC(bstate->bs_sv)->mg_flags U8
430mg_name SvMAGIC(bstate->bs_sv) pvcontents x
431mg_namex SvMAGIC(bstate->bs_sv) svindex x
432xmg_stash bstate->bs_sv svindex x
433gv_fetchpv bstate->bs_sv strconst x
434gv_fetchpvx bstate->bs_sv strconst x
435gv_stashpv bstate->bs_sv strconst x
436gv_stashpvx bstate->bs_sv strconst x
437gp_sv GvSV(bstate->bs_sv) svindex
438gp_refcnt GvREFCNT(bstate->bs_sv) U32
439gp_refcnt_add GvREFCNT(bstate->bs_sv) I32 x
440gp_av *(SV**)&GvAV(bstate->bs_sv) svindex
441gp_hv *(SV**)&GvHV(bstate->bs_sv) svindex
442gp_cv *(SV**)&GvCV(bstate->bs_sv) svindex
443gp_file GvFILE(bstate->bs_sv) pvindex
444gp_io *(SV**)&GvIOp(bstate->bs_sv) svindex
445gp_form *(SV**)&GvFORM(bstate->bs_sv) svindex
446gp_cvgen GvCVGEN(bstate->bs_sv) U32
447gp_line GvLINE(bstate->bs_sv) line_t
448gp_share bstate->bs_sv svindex x
449xgv_flags GvFLAGS(bstate->bs_sv) U8
450op_next PL_op->op_next opindex
451op_sibling PL_op->op_sibling opindex
452op_ppaddr PL_op->op_ppaddr strconst x
453op_targ PL_op->op_targ PADOFFSET
454op_type PL_op OPCODE x
455op_seq PL_op->op_seq U16
456op_flags PL_op->op_flags U8
457op_private PL_op->op_private U8
458op_first cUNOP->op_first opindex
459op_last cBINOP->op_last opindex
460op_other cLOGOP->op_other opindex
461op_pmreplroot cPMOP->op_pmreplroot opindex
462op_pmreplstart cPMOP->op_pmreplstart opindex
463op_pmnext *(OP**)&cPMOP->op_pmnext opindex
464#ifdef USE_ITHREADS
465op_pmstashpv cPMOP pvindex x
466op_pmreplrootpo cPMOP->op_pmreplroot OP*/PADOFFSET
467#else
468op_pmstash *(SV**)&cPMOP->op_pmstash svindex
469op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot svindex
470#endif
471pregcomp PL_op pvcontents x
472op_pmflags cPMOP->op_pmflags U16
473op_pmpermflags cPMOP->op_pmpermflags U16
474op_pmdynflags cPMOP->op_pmdynflags U8
475op_sv cSVOP->op_sv svindex
476op_padix cPADOP->op_padix PADOFFSET
477op_pv cPVOP->op_pv pvcontents
478op_pv_tr cPVOP->op_pv op_tr_array
479op_redoop cLOOP->op_redoop opindex
480op_nextop cLOOP->op_nextop opindex
481op_lastop cLOOP->op_lastop opindex
482cop_label cCOP->cop_label pvindex
483#ifdef USE_ITHREADS
484cop_stashpv cCOP pvindex x
485cop_file cCOP pvindex x
486#else
487cop_stash cCOP svindex x
488cop_filegv cCOP svindex x
489#endif
490cop_seq cCOP->cop_seq U32
491cop_arybase cCOP->cop_arybase I32
492cop_line cCOP->cop_line line_t
493cop_io cCOP->cop_io svindex
494cop_warnings cCOP->cop_warnings svindex
495main_start PL_main_start opindex
496main_root PL_main_root opindex
497main_cv *(SV**)&PL_main_cv svindex
498curpad PL_curpad svindex x
499push_begin PL_beginav svindex x
500push_init PL_initav svindex x
501push_end PL_endav svindex x
502curstash *(SV**)&PL_curstash svindex
503defstash *(SV**)&PL_defstash svindex
504data none U8 x
505incav *(SV**)&GvAV(PL_incgv) svindex
506load_glob none svindex x
507#ifdef USE_ITHREADS
508regex_padav *(SV**)&PL_regex_padav svindex
509#endif
510dowarn PL_dowarn U8
511comppad_name *(SV**)&PL_comppad_name svindex
512xgv_stash *(SV**)&GvSTASH(bstate->bs_sv) svindex
513signal bstate->bs_sv strconst x
514# to be removed
515formfeed PL_formfeed svindex
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