BEGIN { push @INC, './lib'; } use strict; my %alias_to = ( U32 => [qw(PADOFFSET STRLEN)], I32 => [qw(SSize_t long)], U16 => [qw(OPCODE line_t short)], U8 => [qw(char)], ); my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP); # Nullsv *must* come first in the following so that the condition # ($$sv == 0) can continue to be used to test (sv == Nullsv). my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE); my (%alias_from, $from, $tos); while (($from, $tos) = each %alias_to) { map { $alias_from{$_} = $from } @$tos; } my $c_header = <<'EOT'; /* * Copyright (c) 1996-1999 Malcolm Beattie * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * This file is autogenerated from bytecode.pl. Changes made here will be lost. */ EOT my $perl_header; ($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g; unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm"; # # Start with boilerplate for Asmdata.pm # open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!"; print ASMDATA_PM $perl_header, <<'EOT'; package B::Asmdata; our $VERSION = '1.00'; use Exporter; @ISA = qw(Exporter); @EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name); our(%insn_data, @insn_name, @optype, @specialsv_name); EOT print ASMDATA_PM <<"EOT"; \@optype = qw(@optype); \@specialsv_name = qw(@specialsv); # XXX insn_data is initialised this way because with a large # %insn_data = (foo => [...], bar => [...], ...) initialiser # I get a hard-to-track-down stack underflow and segfault. EOT # # Boilerplate for byterun.c # open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!"; print BYTERUN_C $c_header, <<'EOT'; #define PERL_NO_GET_CONTEXT #include "EXTERN.h" #include "perl.h" #define NO_XSLOCKS #include "XSUB.h" #include "byterun.h" #include "bytecode.h" static const int optype_size[] = { EOT my $i = 0; for ($i = 0; $i < @optype - 1; $i++) { printf BYTERUN_C " sizeof(%s),\n", $optype[$i], $i; } printf BYTERUN_C " sizeof(%s)\n", $optype[$i], $i; print BYTERUN_C <<'EOT'; }; void * bset_obj_store(pTHX_ struct byteloader_state *bstate, void *obj, I32 ix) { if (ix > bstate->bs_obj_list_fill) { Renew(bstate->bs_obj_list, ix + 32, void*); bstate->bs_obj_list_fill = ix + 31; } bstate->bs_obj_list[ix] = obj; return obj; } void byterun(pTHX_ register struct byteloader_state *bstate) { register int insn; U32 ix; SV *specialsv_list[6]; BYTECODE_HEADER_CHECK; /* croak if incorrect platform */ New(666, bstate->bs_obj_list, 32, void*); /* set op objlist */ bstate->bs_obj_list_fill = 31; EOT for my $i ( 0 .. $#specialsv ) { print BYTERUN_C " specialsv_list[$i] = $specialsv[$i];\n"; } print BYTERUN_C <<'EOT'; while ((insn = BGET_FGETC()) != EOF) { switch (insn) { EOT my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype); while () { chop; s/#.*//; # remove comments next unless length; if (/^%number\s+(.*)/) { $insn_num = $1; next; } elsif (/%enum\s+(.*?)\s+(.*)/) { create_enum($1, $2); # must come before instructions next; } ($insn, $lvalue, $argtype, $flags) = split; $insn_name[$insn_num] = $insn; $fundtype = $alias_from{$argtype} || $argtype; # # Add the case statement and code for the bytecode interpreter in byterun.c # printf BYTERUN_C "\t case INSN_%s:\t\t/* %d */\n\t {\n", uc($insn), $insn_num; my $optarg = $argtype eq "none" ? "" : ", arg"; if ($optarg) { printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype; } if ($flags =~ /x/) { print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n"; } elsif ($flags =~ /s/) { # Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue. print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n"; } elsif ($optarg && $lvalue ne "none") { print BYTERUN_C "\t\t$lvalue = arg;\n"; } print BYTERUN_C "\t\tbreak;\n\t }\n"; # # Add the initialiser line for %insn_data in Asmdata.pm # print ASMDATA_PM <<"EOT"; \$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"]; EOT # Find the next unused instruction number do { $insn_num++ } while $insn_name[$insn_num]; } # # Finish off byterun.c # print BYTERUN_C <<'EOT'; default: Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn); /* NOTREACHED */ } } } EOT # # Write the instruction and optype enum constants into byterun.h # open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!"; print BYTERUN_H $c_header, <<'EOT'; struct byteloader_fdata { SV *datasv; int next_out; int idx; }; struct byteloader_state { struct byteloader_fdata *bs_fdata; SV *bs_sv; void **bs_obj_list; int bs_obj_list_fill; XPV bs_pv; int bs_iv_overflows; }; int bl_getc(struct byteloader_fdata *); int bl_read(struct byteloader_fdata *, char *, size_t, size_t); extern void byterun(pTHX_ struct byteloader_state *); enum { EOT my $add_enum_value = 0; my $max_insn; for $i ( 0 .. $#insn_name ) { $insn = uc($insn_name[$i]); if (defined($insn)) { $max_insn = $i; if ($add_enum_value) { print BYTERUN_H " INSN_$insn = $i,\t\t\t/* $i */\n"; $add_enum_value = 0; } else { print BYTERUN_H " INSN_$insn,\t\t\t/* $i */\n"; } } else { $add_enum_value = 1; } } print BYTERUN_H " MAX_INSN = $max_insn\n};\n"; print BYTERUN_H "\nenum {\n"; for ($i = 0; $i < @optype - 1; $i++) { printf BYTERUN_H " OPt_%s,\t\t/* %d */\n", $optype[$i], $i; } printf BYTERUN_H " OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i; # # Finish off insn_data and create array initialisers in Asmdata.pm # print ASMDATA_PM <<'EOT'; my ($insn_name, $insn_data); while (($insn_name, $insn_data) = each %insn_data) { $insn_name[$insn_data->[0]] = $insn_name; } # Fill in any gaps @insn_name = map($_ || "unused", @insn_name); 1; __END__ =head1 NAME B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode =head1 SYNOPSIS use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name); =head1 DESCRIPTION Provides information about Perl ops in order to generate bytecode via a bunch of exported variables. Its mostly used by B::Assembler and B::Disassembler. =over 4 =item %insn_data my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name}; For a given $op_name (for example, 'cop_label', 'sv_flags', etc...) you get an array ref containing the bytecode number of the op, a reference to the subroutine used to 'PUT', and the name of the method used to 'GET'. =for _private Add more detail about what $put_sub and $get_meth are and how to use them. =item @insn_name my $op_name = $insn_name[$bytecode_num]; A simple mapping of the bytecode number to the name of the op. Suitable for using with %insn_data like so: my $op_info = $insn_data{$insn_name[$bytecode_num]}; =item @optype my $op_type = $optype[$op_type_num]; A simple mapping of the op type number to its type (like 'COP' or 'BINOP'). =item @specialsv_name my $sv_name = $specialsv_name[$sv_index]; Certain SV types are considered 'special'. They're represented by B::SPECIAL and are refered to by a number from the specialsv_list. This array maps that number back to the name of the SV (like 'Nullsv' or '&PL_sv_undef'). =back =head1 AUTHOR Malcolm Beattie, C =cut EOT __END__ # First set instruction ord("#") to read comment to end-of-line (sneaky) %number 35 comment arg comment_t # Then make ord("\n") into a no-op %number 10 nop none none # Now for the rest of the ordinary ones, beginning with \0 which is # ret so that \0-terminated strings can be read properly as bytecode. %number 0 # #opcode lvalue argtype flags # ret none none x ldsv bstate->bs_sv svindex ldop PL_op opindex stsv bstate->bs_sv U32 s stop PL_op U32 s stpv bstate->bs_pv.xpv_pv U32 x ldspecsv bstate->bs_sv U8 x newsv bstate->bs_sv U8 x newop PL_op U8 x newopn PL_op U8 x newpv none PV pv_cur bstate->bs_pv.xpv_cur STRLEN pv_free bstate->bs_pv none x sv_upgrade bstate->bs_sv char x sv_refcnt SvREFCNT(bstate->bs_sv) U32 sv_refcnt_add SvREFCNT(bstate->bs_sv) I32 x sv_flags SvFLAGS(bstate->bs_sv) U32 xrv SvRV(bstate->bs_sv) svindex xpv bstate->bs_sv none x xiv32 SvIVX(bstate->bs_sv) I32 xiv64 SvIVX(bstate->bs_sv) IV64 xnv SvNVX(bstate->bs_sv) NV xlv_targoff LvTARGOFF(bstate->bs_sv) STRLEN xlv_targlen LvTARGLEN(bstate->bs_sv) STRLEN xlv_targ LvTARG(bstate->bs_sv) svindex xlv_type LvTYPE(bstate->bs_sv) char xbm_useful BmUSEFUL(bstate->bs_sv) I32 xbm_previous BmPREVIOUS(bstate->bs_sv) U16 xbm_rare BmRARE(bstate->bs_sv) U8 xfm_lines FmLINES(bstate->bs_sv) IV xio_lines IoLINES(bstate->bs_sv) IV xio_page IoPAGE(bstate->bs_sv) IV xio_page_len IoPAGE_LEN(bstate->bs_sv) IV xio_lines_left IoLINES_LEFT(bstate->bs_sv) IV xio_top_name IoTOP_NAME(bstate->bs_sv) pvcontents xio_top_gv *(SV**)&IoTOP_GV(bstate->bs_sv) svindex xio_fmt_name IoFMT_NAME(bstate->bs_sv) pvcontents xio_fmt_gv *(SV**)&IoFMT_GV(bstate->bs_sv) svindex xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv) pvcontents xio_bottom_gv *(SV**)&IoBOTTOM_GV(bstate->bs_sv) svindex xio_subprocess IoSUBPROCESS(bstate->bs_sv) short xio_type IoTYPE(bstate->bs_sv) char xio_flags IoFLAGS(bstate->bs_sv) char xcv_stash *(SV**)&CvSTASH(bstate->bs_sv) svindex xcv_start CvSTART(bstate->bs_sv) opindex xcv_root CvROOT(bstate->bs_sv) opindex xcv_gv *(SV**)&CvGV(bstate->bs_sv) svindex xcv_file CvFILE(bstate->bs_sv) pvindex xcv_depth CvDEPTH(bstate->bs_sv) long xcv_padlist *(SV**)&CvPADLIST(bstate->bs_sv) svindex xcv_outside *(SV**)&CvOUTSIDE(bstate->bs_sv) svindex xcv_flags CvFLAGS(bstate->bs_sv) U16 av_extend bstate->bs_sv SSize_t x av_push bstate->bs_sv svindex x xav_fill AvFILLp(bstate->bs_sv) SSize_t xav_max AvMAX(bstate->bs_sv) SSize_t xav_flags AvFLAGS(bstate->bs_sv) U8 xhv_riter HvRITER(bstate->bs_sv) I32 xhv_name HvNAME(bstate->bs_sv) pvcontents hv_store bstate->bs_sv svindex x sv_magic bstate->bs_sv char x mg_obj SvMAGIC(bstate->bs_sv)->mg_obj svindex mg_private SvMAGIC(bstate->bs_sv)->mg_private U16 mg_flags SvMAGIC(bstate->bs_sv)->mg_flags U8 mg_pv SvMAGIC(bstate->bs_sv) pvcontents x xmg_stash *(SV**)&SvSTASH(bstate->bs_sv) svindex gv_fetchpv bstate->bs_sv strconst x gv_stashpv bstate->bs_sv strconst x gp_sv GvSV(bstate->bs_sv) svindex gp_refcnt GvREFCNT(bstate->bs_sv) U32 gp_refcnt_add GvREFCNT(bstate->bs_sv) I32 x gp_av *(SV**)&GvAV(bstate->bs_sv) svindex gp_hv *(SV**)&GvHV(bstate->bs_sv) svindex gp_cv *(SV**)&GvCV(bstate->bs_sv) svindex gp_file GvFILE(bstate->bs_sv) pvindex gp_io *(SV**)&GvIOp(bstate->bs_sv) svindex gp_form *(SV**)&GvFORM(bstate->bs_sv) svindex gp_cvgen GvCVGEN(bstate->bs_sv) U32 gp_line GvLINE(bstate->bs_sv) line_t gp_share bstate->bs_sv svindex x xgv_flags GvFLAGS(bstate->bs_sv) U8 op_next PL_op->op_next opindex op_sibling PL_op->op_sibling opindex op_ppaddr PL_op->op_ppaddr strconst x op_targ PL_op->op_targ PADOFFSET op_type PL_op OPCODE x op_seq PL_op->op_seq U16 op_flags PL_op->op_flags U8 op_private PL_op->op_private U8 op_first cUNOP->op_first opindex op_last cBINOP->op_last opindex op_other cLOGOP->op_other opindex op_pmreplroot cPMOP->op_pmreplroot opindex op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot svindex op_pmreplstart cPMOP->op_pmreplstart opindex op_pmnext *(OP**)&cPMOP->op_pmnext opindex pregcomp PL_op pvcontents x op_pmflags cPMOP->op_pmflags U16 op_pmpermflags cPMOP->op_pmpermflags U16 op_sv cSVOP->op_sv svindex op_padix cPADOP->op_padix PADOFFSET op_pv cPVOP->op_pv pvcontents op_pv_tr cPVOP->op_pv op_tr_array op_redoop cLOOP->op_redoop opindex op_nextop cLOOP->op_nextop opindex op_lastop cLOOP->op_lastop opindex cop_label cCOP->cop_label pvindex cop_stashpv cCOP pvindex x cop_file cCOP pvindex x cop_seq cCOP->cop_seq U32 cop_arybase cCOP->cop_arybase I32 cop_line cCOP line_t x cop_warnings cCOP->cop_warnings svindex main_start PL_main_start opindex main_root PL_main_root opindex curpad PL_curpad svindex x push_begin PL_beginav svindex x push_init PL_initav svindex x push_end PL_endav svindex x