From d7f9c79eb0370ab14bf61360a1eb84fc0b3fe55b Mon Sep 17 00:00:00 2001 From: ruki Date: Wed, 27 Apr 2016 17:58:10 +0800 Subject: add vsenv utils for tools --- xmake/platforms/iphoneos/checker.lua | 2 +- xmake/platforms/watchos/checker.lua | 2 +- xmake/tools/gas-preprocessor.pl | 1025 --------------------------------- xmake/tools/utils/gas-preprocessor.pl | 1025 +++++++++++++++++++++++++++++++++ xmake/tools/utils/vsenv.lua | 75 +++ 5 files changed, 1102 insertions(+), 1027 deletions(-) delete mode 100755 xmake/tools/gas-preprocessor.pl create mode 100755 xmake/tools/utils/gas-preprocessor.pl create mode 100644 xmake/tools/utils/vsenv.lua diff --git a/xmake/platforms/iphoneos/checker.lua b/xmake/platforms/iphoneos/checker.lua index 21b8bad2d..29602000a 100644 --- a/xmake/platforms/iphoneos/checker.lua +++ b/xmake/platforms/iphoneos/checker.lua @@ -48,7 +48,7 @@ function _check_toolchains(config) checker.check_toolchain(config, "mm", "xcrun -sdk iphoneos ", "clang", "the objc compiler") checker.check_toolchain(config, "mxx", "xcrun -sdk iphoneos ", "clang++", "the objc++ compiler") checker.check_toolchain(config, "mxx", "xcrun -sdk iphoneos ", "clang", "the objc++ compiler") - checker.check_toolchain(config, "as", path.join(os.toolsdir(), "gas-preprocessor.pl xcrun -sdk iphoneos "), "clang", "the assember", _check_as) + checker.check_toolchain(config, "as", path.join(os.toolsdir(), "utils/gas-preprocessor.pl xcrun -sdk iphoneos "), "clang", "the assember", _check_as) checker.check_toolchain(config, "ld", "xcrun -sdk iphoneos ", "clang++", "the linker") checker.check_toolchain(config, "ld", "xcrun -sdk iphoneos ", "clang", "the linker") checker.check_toolchain(config, "ar", "xcrun -sdk iphoneos ", "ar", "the static library linker") diff --git a/xmake/platforms/watchos/checker.lua b/xmake/platforms/watchos/checker.lua index ba1ae0e59..44bfa42e0 100644 --- a/xmake/platforms/watchos/checker.lua +++ b/xmake/platforms/watchos/checker.lua @@ -48,7 +48,7 @@ function _check_toolchains(config) checker.check_toolchain(config, "mm", "xcrun -sdk watchos ", "clang", "the objc compiler") checker.check_toolchain(config, "mxx", "xcrun -sdk watchos ", "clang++", "the objc++ compiler") checker.check_toolchain(config, "mxx", "xcrun -sdk watchos ", "clang", "the objc++ compiler") - checker.check_toolchain(config, "as", path.join(os.toolsdir(), "gas-preprocessor.pl xcrun -sdk watchos "), "clang", "the assember", _check_as) + checker.check_toolchain(config, "as", path.join(os.toolsdir(), "utils/gas-preprocessor.pl xcrun -sdk watchos "), "clang", "the assember", _check_as) checker.check_toolchain(config, "ld", "xcrun -sdk watchos ", "clang++", "the linker") checker.check_toolchain(config, "ld", "xcrun -sdk watchos ", "clang", "the linker") checker.check_toolchain(config, "ar", "xcrun -sdk watchos ", "ar", "the static library linker") diff --git a/xmake/tools/gas-preprocessor.pl b/xmake/tools/gas-preprocessor.pl deleted file mode 100755 index 98dfe4ad9..000000000 --- a/xmake/tools/gas-preprocessor.pl +++ /dev/null @@ -1,1025 +0,0 @@ -#!/usr/bin/env perl -# by David Conrad -# This code is licensed under GPLv2 or later; go to gnu.org to read it -# (not that it much matters for an asm preprocessor) -# usage: set your assembler to be something like "perl gas-preprocessor.pl gcc" -use strict; - -# Apple's gas is ancient and doesn't support modern preprocessing features like -# .rept and has ugly macro syntax, among other things. Thus, this script -# implements the subset of the gas preprocessor used by x264 and ffmpeg -# that isn't supported by Apple's gas. - -my %canonical_arch = ("aarch64" => "aarch64", "arm64" => "aarch64", - "arm" => "arm", - "powerpc" => "powerpc", "ppc" => "powerpc"); - -my %comments = ("aarch64" => '//', - "arm" => '@', - "powerpc" => '#'); - -my @gcc_cmd; -my @preprocess_c_cmd; - -my $comm; -my $arch; -my $as_type = "apple-gas"; - -my $fix_unreq = $^O eq "darwin"; -my $force_thumb = 0; - -my $arm_cond_codes = "eq|ne|cs|cc|mi|pl|vs|vc|hi|ls|ge|lt|gt|le|al|hs|lo"; - -my $usage_str = " -$0\n -Gas-preprocessor.pl converts assembler files using modern GNU as syntax for -Apple's ancient gas version or clang's incompatible integrated assembler. The -conversion is regularly tested for Libav, x264 and vlc. Other projects might -use different features which are not correctly handled. - -Options for this program needs to be separated with ' -- ' from the assembler -command. Following options are currently supported: - - -help - this usage text - -arch - target architecture - -as-type - one value out of {{,apple-}{gas,clang},armasm} - -fix-unreq - -no-fix-unreq - -force-thumb - assemble as thumb regardless of the input source - (note, this is incomplete and only works for sources - it explicitly was tested with) -"; - -sub usage() { - print $usage_str; -} - -while (@ARGV) { - my $opt = shift; - - if ($opt =~ /^-(no-)?fix-unreq$/) { - $fix_unreq = $1 ne "no-"; - } elsif ($opt eq "-force-thumb") { - $force_thumb = 1; - } elsif ($opt eq "-arch") { - $arch = shift; - die "unknown arch: '$arch'\n" if not exists $comments{$arch}; - } elsif ($opt eq "-as-type") { - $as_type = shift; - die "unknown as type: '$as_type'\n" if $as_type !~ /^((apple-)?(gas|clang)|armasm)$/; - } elsif ($opt eq "-help") { - usage(); - exit 0; - } elsif ($opt eq "--" ) { - @gcc_cmd = @ARGV; - } elsif ($opt =~ /^-/) { - die "option '$opt' is not known. See '$0 -help' for usage information\n"; - } else { - push @gcc_cmd, $opt, @ARGV; - } - last if (@gcc_cmd); -} - -if (grep /\.c$/, @gcc_cmd) { - # C file (inline asm?) - compile - @preprocess_c_cmd = (@gcc_cmd, "-S"); -} elsif (grep /\.[sS]$/, @gcc_cmd) { - # asm file, just do C preprocessor - @preprocess_c_cmd = (@gcc_cmd, "-E"); -} elsif (grep /-(v|-version|dumpversion)/, @gcc_cmd) { - # pass -v/--version along, used during probing. Matching '-v' might have - # uninteded results but it doesn't matter much if gas-preprocessor or - # the compiler fails. - exec(@gcc_cmd); -} else { - die "Unrecognized input filetype"; -} -if ($as_type eq "armasm") { - - $preprocess_c_cmd[0] = "cpp"; - - @preprocess_c_cmd = grep ! /^-nologo$/, @preprocess_c_cmd; - # Remove -ignore XX parameter pairs from preprocess_c_cmd - my $index = 1; - while ($index < $#preprocess_c_cmd) { - if ($preprocess_c_cmd[$index] eq "-ignore" and $index + 1 < $#preprocess_c_cmd) { - splice(@preprocess_c_cmd, $index, 2); - next; - } - $index++; - } - if (grep /^-MM$/, @preprocess_c_cmd) { - system(@preprocess_c_cmd) == 0 or die "Error running preprocessor"; - exit 0; - } -} - -# if compiling, avoid creating an output file named '-.o' -if ((grep /^-c$/, @gcc_cmd) && !(grep /^-o/, @gcc_cmd)) { - foreach my $i (@gcc_cmd) { - if ($i =~ /\.[csS]$/) { - my $outputfile = $i; - $outputfile =~ s/\.[csS]$/.o/; - push(@gcc_cmd, "-o"); - push(@gcc_cmd, $outputfile); - last; - } - } -} -# replace only the '-o' argument with '-', avoids rewriting the make dependency -# target specified with -MT to '-' -my $index = 1; -while ($index < $#preprocess_c_cmd) { - if ($preprocess_c_cmd[$index] eq "-o") { - $index++; - $preprocess_c_cmd[$index] = "-"; - } - $index++; -} - -my $tempfile; -if ($as_type ne "armasm") { - @gcc_cmd = map { /\.[csS]$/ ? qw(-x assembler -) : $_ } @gcc_cmd; -} else { - @preprocess_c_cmd = grep ! /^-c$/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-m/, @preprocess_c_cmd; - - @preprocess_c_cmd = grep ! /^-G/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-W/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-Z/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-fp/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-EHsc$/, @preprocess_c_cmd; - @preprocess_c_cmd = grep ! /^-O/, @preprocess_c_cmd; - - @gcc_cmd = grep ! /^-G/, @gcc_cmd; - @gcc_cmd = grep ! /^-W/, @gcc_cmd; - @gcc_cmd = grep ! /^-Z/, @gcc_cmd; - @gcc_cmd = grep ! /^-fp/, @gcc_cmd; - @gcc_cmd = grep ! /^-EHsc$/, @gcc_cmd; - @gcc_cmd = grep ! /^-O/, @gcc_cmd; - - my @outfiles = grep /\.(o|obj)$/, @gcc_cmd; - $tempfile = $outfiles[0].".asm"; - - # Remove most parameters from gcc_cmd, which actually is the armasm command, - # which doesn't support any of the common compiler/preprocessor options. - @gcc_cmd = grep ! /^-D/, @gcc_cmd; - @gcc_cmd = grep ! /^-U/, @gcc_cmd; - @gcc_cmd = grep ! /^-m/, @gcc_cmd; - @gcc_cmd = grep ! /^-M/, @gcc_cmd; - @gcc_cmd = grep ! /^-c$/, @gcc_cmd; - @gcc_cmd = grep ! /^-I/, @gcc_cmd; - @gcc_cmd = map { /\.S$/ ? $tempfile : $_ } @gcc_cmd; -} - -# detect architecture from gcc binary name -if (!$arch) { - if ($gcc_cmd[0] =~ /(arm64|aarch64|arm|powerpc|ppc)/) { - $arch = $1; - } else { - # look for -arch flag - foreach my $i (1 .. $#gcc_cmd-1) { - if ($gcc_cmd[$i] eq "-arch" and - $gcc_cmd[$i+1] =~ /(arm64|aarch64|arm|powerpc|ppc)/) { - $arch = $1; - } - } - } -} - -# assume we're not cross-compiling if no -arch or the binary doesn't have the arch name -$arch = qx/arch/ if (!$arch); - -die "Unknown target architecture '$arch'" if not exists $canonical_arch{$arch}; - -$arch = $canonical_arch{$arch}; -$comm = $comments{$arch}; -my $inputcomm = $comm; -$comm = ";" if $as_type =~ /armasm/; - -my %ppc_spr = (ctr => 9, - vrsave => 256); - -open(INPUT, "-|", @preprocess_c_cmd) || die "Error running preprocessor"; - -if ($ENV{GASPP_DEBUG}) { - open(ASMFILE, ">&STDOUT"); -} else { - if ($as_type ne "armasm") { - open(ASMFILE, "|-", @gcc_cmd) or die "Error running assembler"; - } else { - open(ASMFILE, ">", $tempfile); - } -} - -my $current_macro = ''; -my $macro_level = 0; -my $rept_level = 0; -my %macro_lines; -my %macro_args; -my %macro_args_default; -my $macro_count = 0; -my $altmacro = 0; -my $in_irp = 0; - -my $num_repts; -my @rept_lines; - -my @irp_args; -my $irp_param; - -my @ifstack; - -my %symbols; - -my @sections; - -my %literal_labels; # for ldr , = -my $literal_num = 0; -my $literal_expr = ".word"; -$literal_expr = ".quad" if $arch eq "aarch64"; - -my $thumb = 0; - -my %thumb_labels; -my %call_targets; -my %mov32_targets; - -my %neon_alias_reg; -my %neon_alias_type; - -my $temp_label_next = 0; -my %last_temp_labels; -my %next_temp_labels; - -my %labels_seen; - -my %aarch64_req_alias; - -if ($force_thumb) { - parse_line(".thumb\n"); -} - -# pass 1: parse .macro -# note that the handling of arguments is probably overly permissive vs. gas -# but it should be the same for valid cases -while () { - # remove all comments (to avoid interfering with evaluating directives) - s/(? 0) { - $ifstack[-1] = -$ifstack[-1]; - } - return 1; - } elsif ($line =~ /\.else/) { - $ifstack[-1] = !$ifstack[-1]; - return 1; - } elsif (handle_if($line)) { - return 1; - } - } - - # discard lines in false .if blocks - foreach my $i (0 .. $#ifstack) { - if ($ifstack[$i] <= 0) { - return 1; - } - } - } - return 0; -} - -sub parse_line { - my $line = $_[0]; - - return if (parse_if_line($line)); - - if (scalar(@rept_lines) == 0) { - if (/\.macro/) { - $macro_level++; - if ($macro_level > 1 && !$current_macro) { - die "nested macros but we don't have master macro"; - } - } elsif (/\.endm/) { - $macro_level--; - if ($macro_level < 0) { - die "unmatched .endm"; - } elsif ($macro_level == 0) { - $current_macro = ''; - return; - } - } - } - - if ($macro_level == 0) { - if ($line =~ /\.(rept|irp)/) { - $rept_level++; - } elsif ($line =~ /.endr/) { - $rept_level--; - } - } - - if ($macro_level > 1) { - push(@{$macro_lines{$current_macro}}, $line); - } elsif (scalar(@rept_lines) and $rept_level >= 1) { - push(@rept_lines, $line); - } elsif ($macro_level == 0) { - expand_macros($line); - } else { - if ($line =~ /\.macro\s+([\d\w\.]+)\s*(.*)/) { - $current_macro = $1; - - # commas in the argument list are optional, so only use whitespace as the separator - my $arglist = $2; - $arglist =~ s/,/ /g; - - my @args = split(/\s+/, $arglist); - foreach my $i (0 .. $#args) { - my @argpair = split(/=/, $args[$i]); - $macro_args{$current_macro}[$i] = $argpair[0]; - $argpair[0] =~ s/:vararg$//; - $macro_args_default{$current_macro}{$argpair[0]} = $argpair[1]; - } - # ensure %macro_lines has the macro name added as a key - $macro_lines{$current_macro} = []; - - } elsif ($current_macro) { - push(@{$macro_lines{$current_macro}}, $line); - } else { - die "macro level without a macro name"; - } - } -} - -sub handle_set { - my $line = $_[0]; - if ($line =~ /\.set\s+(.*),\s*(.*)/) { - $symbols{$1} = eval_expr($2); - return 1; - } - return 0; -} - -sub expand_macros { - my $line = $_[0]; - - # handle .if directives; apple's assembler doesn't support important non-basic ones - # evaluating them is also needed to handle recursive macros - if (handle_if($line)) { - return; - } - - if (/\.purgem\s+([\d\w\.]+)/) { - delete $macro_lines{$1}; - delete $macro_args{$1}; - delete $macro_args_default{$1}; - return; - } - - if ($line =~ /\.altmacro/) { - $altmacro = 1; - return; - } - - if ($line =~ /\.noaltmacro/) { - $altmacro = 0; - return; - } - - $line =~ s/\%([^,]*)/eval_expr($1)/eg if $altmacro; - - # Strip out the .set lines from the armasm output - return if (handle_set($line) and $as_type eq "armasm"); - - if ($line =~ /\.rept\s+(.*)/) { - $num_repts = $1; - @rept_lines = ("\n"); - - # handle the possibility of repeating another directive on the same line - # .endr on the same line is not valid, I don't know if a non-directive is - if ($num_repts =~ s/(\.\w+.*)//) { - push(@rept_lines, "$1\n"); - } - $num_repts = eval_expr($num_repts); - } elsif ($line =~ /\.irp\s+([\d\w\.]+)\s*(.*)/) { - $in_irp = 1; - $num_repts = 1; - @rept_lines = ("\n"); - $irp_param = $1; - - # only use whitespace as the separator - my $irp_arglist = $2; - $irp_arglist =~ s/,/ /g; - $irp_arglist =~ s/^\s+//; - @irp_args = split(/\s+/, $irp_arglist); - } elsif ($line =~ /\.irpc\s+([\d\w\.]+)\s*(.*)/) { - $in_irp = 1; - $num_repts = 1; - @rept_lines = ("\n"); - $irp_param = $1; - - my $irp_arglist = $2; - $irp_arglist =~ s/,/ /g; - $irp_arglist =~ s/^\s+//; - @irp_args = split(//, $irp_arglist); - } elsif ($line =~ /\.endr/) { - my @prev_rept_lines = @rept_lines; - my $prev_in_irp = $in_irp; - my @prev_irp_args = @irp_args; - my $prev_irp_param = $irp_param; - my $prev_num_repts = $num_repts; - @rept_lines = (); - $in_irp = 0; - @irp_args = ''; - - if ($prev_in_irp != 0) { - foreach my $i (@prev_irp_args) { - foreach my $origline (@prev_rept_lines) { - my $line = $origline; - $line =~ s/\\$prev_irp_param/$i/g; - $line =~ s/\\\(\)//g; # remove \() - parse_line($line); - } - } - } else { - for (1 .. $prev_num_repts) { - foreach my $origline (@prev_rept_lines) { - my $line = $origline; - parse_line($line); - } - } - } - } elsif ($line =~ /(\S+:|)\s*([\w\d\.]+)\s*(.*)/ && exists $macro_lines{$2}) { - handle_serialized_line($1); - my $macro = $2; - - # commas are optional here too, but are syntactically important because - # parameters can be blank - my @arglist = split(/,/, $3); - my @args; - my @args_seperator; - - my $comma_sep_required = 0; - foreach (@arglist) { - # allow arithmetic/shift operators in macro arguments - $_ =~ s/\s*(\+|-|\*|\/|<<|>>|<|>)\s*/$1/g; - - my @whitespace_split = split(/\s+/, $_); - if (!@whitespace_split) { - push(@args, ''); - push(@args_seperator, ''); - } else { - foreach (@whitespace_split) { - #print ("arglist = \"$_\"\n"); - if (length($_)) { - push(@args, $_); - my $sep = $comma_sep_required ? "," : " "; - push(@args_seperator, $sep); - #print ("sep = \"$sep\", arg = \"$_\"\n"); - $comma_sep_required = 0; - } - } - } - - $comma_sep_required = 1; - } - - my %replacements; - if ($macro_args_default{$macro}){ - %replacements = %{$macro_args_default{$macro}}; - } - - # construct hashtable of text to replace - foreach my $i (0 .. $#args) { - my $argname = $macro_args{$macro}[$i]; - my @macro_args = @{ $macro_args{$macro} }; - if ($args[$i] =~ m/=/) { - # arg=val references the argument name - # XXX: I'm not sure what the expected behaviour if a lot of - # these are mixed with unnamed args - my @named_arg = split(/=/, $args[$i]); - $replacements{$named_arg[0]} = $named_arg[1]; - } elsif ($i > $#{$macro_args{$macro}}) { - # more args given than the macro has named args - # XXX: is vararg allowed on arguments before the last? - $argname = $macro_args{$macro}[-1]; - if ($argname =~ s/:vararg$//) { - #print "macro = $macro, args[$i] = $args[$i], args_seperator=@args_seperator, argname = $argname, arglist[$i] = $arglist[$i], arglist = @arglist, args=@args, macro_args=@macro_args\n"; - #$replacements{$argname} .= ", $args[$i]"; - $replacements{$argname} .= "$args_seperator[$i] $args[$i]"; - } else { - die "Too many arguments to macro $macro"; - } - } else { - $argname =~ s/:vararg$//; - $replacements{$argname} = $args[$i]; - } - } - - my $count = $macro_count++; - - # apply replacements as regex - foreach (@{$macro_lines{$macro}}) { - my $macro_line = $_; - # do replacements by longest first, this avoids wrong replacement - # when argument names are subsets of each other - foreach (reverse sort {length $a <=> length $b} keys %replacements) { - $macro_line =~ s/\\$_/$replacements{$_}/g; - } - if ($altmacro) { - foreach (reverse sort {length $a <=> length $b} keys %replacements) { - $macro_line =~ s/\b$_\b/$replacements{$_}/g; - } - } - $macro_line =~ s/\\\@/$count/g; - $macro_line =~ s/\\\(\)//g; # remove \() - parse_line($macro_line); - } - } else { - handle_serialized_line($line); - } -} - -sub is_arm_register { - my $name = $_[0]; - if ($name eq "lr" or - $name eq "ip" or - $name =~ /^[rav]\d+$/) { - return 1; - } - return 0; -} - -sub handle_local_label { - my $line = $_[0]; - my $num = $_[1]; - my $dir = $_[2]; - my $target = "$num$dir"; - if ($dir eq "b") { - $line =~ s/$target/$last_temp_labels{$num}/g; - } else { - my $name = "temp_label_$temp_label_next"; - $temp_label_next++; - push(@{$next_temp_labels{$num}}, $name); - $line =~ s/$target/$name/g; - } - return $line; -} - -sub handle_serialized_line { - my $line = $_[0]; - - # handle .previous (only with regard to .section not .subsection) - if ($line =~ /\.(section|text|const_data)/) { - push(@sections, $line); - } elsif ($line =~ /\.previous/) { - if (!$sections[-2]) { - die ".previous without a previous section"; - } - $line = $sections[-2]; - push(@sections, $line); - } - - $thumb = 1 if $line =~ /\.code\s+16|\.thumb/; - $thumb = 0 if $line =~ /\.code\s+32|\.arm/; - - # handle ldr , = - if ($line =~ /(.*)\s*ldr([\w\s\d]+)\s*,\s*=(.*)/ and $as_type ne "armasm") { - my $label = $literal_labels{$3}; - if (!$label) { - $label = "Literal_$literal_num"; - $literal_num++; - $literal_labels{$3} = $label; - } - $line = "$1 ldr$2, $label\n"; - } elsif ($line =~ /\.ltorg/ and $as_type ne "armasm") { - $line .= ".align 2\n"; - foreach my $literal (keys %literal_labels) { - $line .= "$literal_labels{$literal}:\n $literal_expr $literal\n"; - } - %literal_labels = (); - } - - # handle GNU as pc-relative relocations for adrp/add - if ($line =~ /(.*)\s*adrp([\w\s\d]+)\s*,\s*#?:pg_hi21:([^\s]+)/) { - $line = "$1 adrp$2, ${3}\@PAGE\n"; - } elsif ($line =~ /(.*)\s*add([\w\s\d]+)\s*,([\w\s\d]+)\s*,\s*#?:lo12:([^\s]+)/) { - $line = "$1 add$2, $3, ${4}\@PAGEOFF\n"; - } - - # thumb add with large immediate needs explicit add.w - if ($thumb and $line =~ /add\s+.*#([^@]+)/) { - $line =~ s/add/add.w/ if eval_expr($1) > 255; - } - - # mach-o local symbol names start with L (no dot) - $line =~ s/(? with ic as conditional code - if ($cond =~ /|$arm_cond_codes/) { - if (exists $thumb_labels{$label}) { - print ASMFILE ".thumb_func $label\n"; - } else { - $call_targets{$label}++; - } - } - } - - # @l -> lo16() @ha -> ha16() - $line =~ s/,\s+([^,]+)\@l\b/, lo16($1)/g; - $line =~ s/,\s+([^,]+)\@ha\b/, ha16($1)/g; - - # move to/from SPR - if ($line =~ /(\s+)(m[ft])([a-z]+)\s+(\w+)/ and exists $ppc_spr{$3}) { - if ($2 eq 'mt') { - $line = "$1${2}spr $ppc_spr{$3}, $4\n"; - } else { - $line = "$1${2}spr $4, $ppc_spr{$3}\n"; - } - } - - if ($line =~ /\.unreq\s+(.*)/) { - if (defined $neon_alias_reg{$1}) { - delete $neon_alias_reg{$1}; - delete $neon_alias_type{$1}; - return; - } elsif (defined $aarch64_req_alias{$1}) { - delete $aarch64_req_alias{$1}; - return; - } - } - # old gas versions store upper and lower case names on .req, - # but they remove only one on .unreq - if ($fix_unreq) { - if ($line =~ /\.unreq\s+(.*)/) { - $line = ".unreq " . lc($1) . "\n"; - $line .= ".unreq " . uc($1) . "\n"; - } - } - - if ($line =~ /(\w+)\s+\.(dn|qn)\s+(\w+)(?:\.(\w+))?(\[\d+\])?/) { - $neon_alias_reg{$1} = "$3$5"; - $neon_alias_type{$1} = $4; - return; - } - if (scalar keys %neon_alias_reg > 0 && $line =~ /^\s+v\w+/) { - # This line seems to possibly have a neon instruction - foreach (keys %neon_alias_reg) { - my $alias = $_; - # Require the register alias to match as an invididual word, not as a substring - # of a larger word-token. - if ($line =~ /\b$alias\b/) { - $line =~ s/\b$alias\b/$neon_alias_reg{$alias}/g; - # Add the type suffix. If multiple aliases match on the same line, - # only do this replacement the first time (a vfoo.bar string won't match v\w+). - $line =~ s/^(\s+)(v\w+)(\s+)/$1$2.$neon_alias_type{$alias}$3/; - } - } - } - - if ($arch eq "aarch64" or $as_type eq "armasm") { - # clang's integrated aarch64 assembler in Xcode 5 does not support .req/.unreq - if ($line =~ /\b(\w+)\s+\.req\s+(\w+)\b/) { - $aarch64_req_alias{$1} = $2; - return; - } - foreach (keys %aarch64_req_alias) { - my $alias = $_; - # recursively resolve aliases - my $resolved = $aarch64_req_alias{$alias}; - while (defined $aarch64_req_alias{$resolved}) { - $resolved = $aarch64_req_alias{$resolved}; - } - $line =~ s/\b$alias\b/$resolved/g; - } - } - if ($arch eq "aarch64") { - # fix missing aarch64 instructions in Xcode 5.1 (beta3) - # mov with vector arguments is not supported, use alias orr instead - if ($line =~ /^\s*mov\s+(v\d[\.{}\[\]\w]+),\s*(v\d[\.{}\[\]\w]+)\b\s*$/) { - $line = " orr $1, $2, $2\n"; - } - # movi 16, 32 bit shifted variant, shift is optional - if ($line =~ /^\s*movi\s+(v[0-3]?\d\.(?:2|4|8)[hsHS])\s*,\s*(#\w+)\b\s*$/) { - $line = " movi $1, $2, lsl #0\n"; - } - # Xcode 5 misses the alias uxtl. Replace it with the more general ushll. - # Clang 3.4 misses the alias sxtl too. Replace it with the more general sshll. - if ($line =~ /^\s*(s|u)xtl(2)?\s+(v[0-3]?\d\.[248][hsdHSD])\s*,\s*(v[0-3]?\d\.(?:2|4|8|16)[bhsBHS])\b\s*$/) { - $line = " $1shll$2 $3, $4, #0\n"; - } - # clang 3.4 does not automatically use shifted immediates in add/sub - if ($as_type eq "clang" and - $line =~ /^(\s*(?:add|sub)s?) ([^#l]+)#([\d\+\-\*\/ <>]+)\s*$/) { - my $imm = eval $3; - if ($imm > 4095 and not ($imm & 4095)) { - $line = "$1 $2#" . ($imm >> 12) . ", lsl #12\n"; - } - } - if ($ENV{GASPP_FIX_XCODE5}) { - if ($line =~ /^\s*bsl\b/) { - $line =~ s/\b(bsl)(\s+v[0-3]?\d\.(\w+))\b/$1.$3$2/; - $line =~ s/\b(v[0-3]?\d)\.$3\b/$1/g; - } - if ($line =~ /^\s*saddl2?\b/) { - $line =~ s/\b(saddl2?)(\s+v[0-3]?\d\.(\w+))\b/$1.$3$2/; - $line =~ s/\b(v[0-3]?\d)\.\w+\b/$1/g; - } - if ($line =~ /^\s*dup\b.*\]$/) { - $line =~ s/\bdup(\s+v[0-3]?\d)\.(\w+)\b/dup.$2$1/g; - $line =~ s/\b(v[0-3]?\d)\.[bhsdBHSD](\[\d\])$/$1$2/g; - } - } - } - - if ($as_type eq "armasm") { - # Also replace variables set by .set - foreach (keys %symbols) { - my $sym = $_; - $line =~ s/\b$sym\b/$symbols{$sym}/g; - } - - # Handle function declarations and keep track of the declared labels - if ($line =~ s/^\s*\.func\s+(\w+)/$1 PROC/) { - $labels_seen{$1} = 1; - } - - if ($line =~ s/^(\d+)://) { - # Convert local labels into unique labels. armasm (at least in - # RVCT) has something similar, but still different enough. - # By converting to unique labels we avoid any possible - # incompatibilities. - - my $num = $1; - foreach (@{$next_temp_labels{$num}}) { - $line = "$_\n" . $line; - } - @next_temp_labels{$num} = (); - my $name = "temp_label_$temp_label_next"; - $temp_label_next++; - # The matching regexp above removes the label from the start of - # the line (which might contain an instruction as well), readd - # it on a separate line above it. - $line = "$name:\n" . $line; - $last_temp_labels{$num} = $name; - } - - if ($line =~ s/^(\w+):/$1/) { - # Skip labels that have already been declared with a PROC, - # labels must not be declared multiple times. - return if (defined $labels_seen{$1}); - $labels_seen{$1} = 1; - } elsif ($line !~ /(\w+) PROC/) { - # If not a label, make sure the line starts with whitespace, - # otherwise ms armasm interprets it incorrectly. - $line =~ s/^[\.\w]/\t$&/; - } - - - # Check branch instructions - if ($line =~ /(?:^|\n)\s*(\w+\s*:\s*)?(bl?x?(..)?(\.w)?)\s+(\w+)/) { - my $instr = $2; - my $cond = $3; - my $width = $4; - my $target = $5; - # Don't interpret e.g. bic as b with ic as conditional code - if ($cond !~ /|$arm_cond_codes/) { - # Not actually a branch - } elsif ($target =~ /(\d+)([bf])/) { - # The target is a local label - $line = handle_local_label($line, $1, $2); - $line =~ s/\b$instr\b/$&.w/ if $width eq ""; - } elsif (!is_arm_register($target)) { - $call_targets{$target}++; - } - } elsif ($line =~ /^\s*.h?word.*\b\d+[bf]\b/) { - while ($line =~ /\b(\d+)([bf])\b/g) { - $line = handle_local_label($line, $1, $2); - } - } - - # ALIGN in armasm syntax is the actual number of bytes - if ($line =~ /\.align\s+(\d+)/) { - my $align = 1 << $1; - $line =~ s/\.align\s(\d+)/ALIGN $align/; - } - # Convert gas style [r0, :128] into armasm [r0@128] alignment specification - $line =~ s/\[([^\[]+),\s*:(\d+)\]/[$1\@$2]/g; - - # armasm treats logical values {TRUE} and {FALSE} separately from - # numeric values - logical operators and values can't be intermixed - # with numerical values. Evaluate ! and (a <> b) into numbers, - # let the assembler evaluate the rest of the expressions. This current - # only works for cases when ! and <> are used with actual constant numbers, - # we don't evaluate subexpressions here. - - # Evaluate ! - while ($line =~ /!\s*(\d+)/g) { - my $val = ($1 != 0) ? 0 : 1; - $line =~ s/!(\d+)/$val/; - } - # Evaluate (a > b) - while ($line =~ /\(\s*(\d+)\s*([<>])\s*(\d+)\s*\)/) { - my $val; - if ($2 eq "<") { - $val = ($1 < $3) ? 1 : 0; - } else { - $val = ($1 > $3) ? 1 : 0; - } - $line =~ s/\(\s*(\d+)\s*([<>])\s*(\d+)\s*\)/$val/; - } - - # Change a movw... #:lower16: into a mov32 pseudoinstruction - $line =~ s/^(\s*)movw(\s+\w+\s*,\s*)\#:lower16:(.*)$/$1mov32$2$3/; - # and remove the following, matching movt completely - $line =~ s/^\s*movt\s+\w+\s*,\s*\#:upper16:.*$//; - - if ($line =~ /^\s*mov32\s+\w+,\s*([a-zA-Z]\w*)/) { - $mov32_targets{$1}++; - } - - # Misc bugs/deficiencies: - # armasm seems unable to parse e.g. "vmov s0, s1" without a type - # qualifier, thus add .f32. - $line =~ s/^(\s+(?:vmov|vadd))(\s+s)/$1.f32$2/; - # armasm is unable to parse &0x - add spacing - $line =~ s/&0x/& 0x/g; - } - - if ($force_thumb) { - # Convert register post indexing to a separate add instruction. - # This converts e.g. "ldr r0, [r1], r2" into "ldr r0, [r1]", - # "add r1, r1, r2". - $line =~ s/(ldr|str)\s+(\w+),\s*\[(\w+)\],\s*(\w+)/$1 $2, [$3]\n\tadd $3, $3, $4/g; - - # Convert "mov pc, lr" into "bx lr", since the former only works - # for switching from arm to thumb (and only in armv7), but not - # from thumb to arm. - s/mov\s*pc\s*,\s*lr/bx lr/g; - - # Convert stmdb/ldmia with only one register into a plain str/ldr with post-increment/decrement - $line =~ s/stmdb\s+sp!\s*,\s*\{([^,-]+)\}/str $1, [sp, #-4]!/g; - $line =~ s/ldmia\s+sp!\s*,\s*\{([^,-]+)\}/ldr $1, [sp], #4/g; - - $line =~ s/\.arm/.thumb/x; - } - - # comment out unsupported directives - $line =~ s/\.type/$comm$&/x if $as_type =~ /^(apple-|armasm)/; - $line =~ s/\.func/$comm$&/x if $as_type =~ /^(apple-|clang)/; - $line =~ s/\.endfunc/$comm$&/x if $as_type =~ /^(apple-|clang)/; - $line =~ s/\.endfunc/ENDP/x if $as_type =~ /armasm/; - $line =~ s/\.ltorg/$comm$&/x if $as_type =~ /^(apple-|clang)/; - $line =~ s/\.ltorg/LTORG/x if $as_type eq "armasm"; - $line =~ s/\.size/$comm$&/x if $as_type =~ /^(apple-|armasm)/; - $line =~ s/\.fpu/$comm$&/x if $as_type =~ /^(apple-|armasm)/; - $line =~ s/\.arch/$comm$&/x if $as_type =~ /^(apple-|clang|armasm)/; - $line =~ s/\.object_arch/$comm$&/x if $as_type =~ /^(apple-|armasm)/; - $line =~ s/.section\s+.note.GNU-stack.*/$comm$&/x if $as_type =~ /^(apple-|armasm)/; - $line =~ s/\.hidden/$comm$&/x if $as_type =~ /^(apple-|clang|armasm)/; - - $line =~ s/\.syntax/$comm$&/x if $as_type =~ /armasm/; - - $line =~ s/\.hword/.short/x; - - if ($as_type =~ /^apple-/) { - # the syntax for these is a little different - $line =~ s/\.global/.globl/x; - # also catch .section .rodata since the equivalent to .const_data is .section __DATA,__const - $line =~ s/(.*)\.rodata/.const_data/x; - $line =~ s/\.int/.long/x; - $line =~ s/\.float/.single/x; - } - if ($as_type eq "armasm") { - $line =~ s/\.global/EXPORT/x; - $line =~ s/\.int/dcd/x; - $line =~ s/\.long/dcd/x; - $line =~ s/\.float/dcfs/x; - $line =~ s/\.word/dcd/x; - $line =~ s/\.short/dcw/x; - $line =~ s/\.byte/dcb/x; - $line =~ s/\.thumb/THUMB/x; - $line =~ s/\.arm/ARM/x; - # The alignment in AREA is the power of two, just as .align in gas - $line =~ s/\.text/AREA |.text|, CODE, READONLY, ALIGN=2, CODEALIGN/; - $line =~ s/(\s*)(.*)\.rodata/$1AREA |.rodata|, DATA, READONLY, ALIGN=5/; - - $line =~ s/fmxr/vmsr/; - $line =~ s/fmrx/vmrs/; - $line =~ s/fadds/vadd/; - } - - # catch unknown section names that aren't mach-o style (with a comma) - if ($as_type =~ /apple-/ and $line =~ /.section ([^,]*)$/) { - die ".section $1 unsupported; figure out the mach-o section name and add it"; - } - - print ASMFILE $line; -} - -if ($as_type ne "armasm") { - print ASMFILE ".text\n"; - print ASMFILE ".align 2\n"; - foreach my $literal (keys %literal_labels) { - print ASMFILE "$literal_labels{$literal}:\n $literal_expr $literal\n"; - } - - map print(ASMFILE ".thumb_func $_\n"), - grep exists $thumb_labels{$_}, keys %call_targets; -} else { - map print(ASMFILE "\tIMPORT $_\n"), - grep ! exists $labels_seen{$_}, (keys %call_targets, keys %mov32_targets); - - print ASMFILE "\tEND\n"; -} - -close(INPUT) or exit 1; -close(ASMFILE) or exit 1; -if ($as_type eq "armasm" and ! defined $ENV{GASPP_DEBUG}) { - system(@gcc_cmd) == 0 or die "Error running assembler"; -} - -END { - unlink($tempfile) if defined $tempfile; -} -#exit 1 diff --git a/xmake/tools/utils/gas-preprocessor.pl b/xmake/tools/utils/gas-preprocessor.pl new file mode 100755 index 000000000..98dfe4ad9 --- /dev/null +++ b/xmake/tools/utils/gas-preprocessor.pl @@ -0,0 +1,1025 @@ +#!/usr/bin/env perl +# by David Conrad +# This code is licensed under GPLv2 or later; go to gnu.org to read it +# (not that it much matters for an asm preprocessor) +# usage: set your assembler to be something like "perl gas-preprocessor.pl gcc" +use strict; + +# Apple's gas is ancient and doesn't support modern preprocessing features like +# .rept and has ugly macro syntax, among other things. Thus, this script +# implements the subset of the gas preprocessor used by x264 and ffmpeg +# that isn't supported by Apple's gas. + +my %canonical_arch = ("aarch64" => "aarch64", "arm64" => "aarch64", + "arm" => "arm", + "powerpc" => "powerpc", "ppc" => "powerpc"); + +my %comments = ("aarch64" => '//', + "arm" => '@', + "powerpc" => '#'); + +my @gcc_cmd; +my @preprocess_c_cmd; + +my $comm; +my $arch; +my $as_type = "apple-gas"; + +my $fix_unreq = $^O eq "darwin"; +my $force_thumb = 0; + +my $arm_cond_codes = "eq|ne|cs|cc|mi|pl|vs|vc|hi|ls|ge|lt|gt|le|al|hs|lo"; + +my $usage_str = " +$0\n +Gas-preprocessor.pl converts assembler files using modern GNU as syntax for +Apple's ancient gas version or clang's incompatible integrated assembler. The +conversion is regularly tested for Libav, x264 and vlc. Other projects might +use different features which are not correctly handled. + +Options for this program needs to be separated with ' -- ' from the assembler +command. Following options are currently supported: + + -help - this usage text + -arch - target architecture + -as-type - one value out of {{,apple-}{gas,clang},armasm} + -fix-unreq + -no-fix-unreq + -force-thumb - assemble as thumb regardless of the input source + (note, this is incomplete and only works for sources + it explicitly was tested with) +"; + +sub usage() { + print $usage_str; +} + +while (@ARGV) { + my $opt = shift; + + if ($opt =~ /^-(no-)?fix-unreq$/) { + $fix_unreq = $1 ne "no-"; + } elsif ($opt eq "-force-thumb") { + $force_thumb = 1; + } elsif ($opt eq "-arch") { + $arch = shift; + die "unknown arch: '$arch'\n" if not exists $comments{$arch}; + } elsif ($opt eq "-as-type") { + $as_type = shift; + die "unknown as type: '$as_type'\n" if $as_type !~ /^((apple-)?(gas|clang)|armasm)$/; + } elsif ($opt eq "-help") { + usage(); + exit 0; + } elsif ($opt eq "--" ) { + @gcc_cmd = @ARGV; + } elsif ($opt =~ /^-/) { + die "option '$opt' is not known. See '$0 -help' for usage information\n"; + } else { + push @gcc_cmd, $opt, @ARGV; + } + last if (@gcc_cmd); +} + +if (grep /\.c$/, @gcc_cmd) { + # C file (inline asm?) - compile + @preprocess_c_cmd = (@gcc_cmd, "-S"); +} elsif (grep /\.[sS]$/, @gcc_cmd) { + # asm file, just do C preprocessor + @preprocess_c_cmd = (@gcc_cmd, "-E"); +} elsif (grep /-(v|-version|dumpversion)/, @gcc_cmd) { + # pass -v/--version along, used during probing. Matching '-v' might have + # uninteded results but it doesn't matter much if gas-preprocessor or + # the compiler fails. + exec(@gcc_cmd); +} else { + die "Unrecognized input filetype"; +} +if ($as_type eq "armasm") { + + $preprocess_c_cmd[0] = "cpp"; + + @preprocess_c_cmd = grep ! /^-nologo$/, @preprocess_c_cmd; + # Remove -ignore XX parameter pairs from preprocess_c_cmd + my $index = 1; + while ($index < $#preprocess_c_cmd) { + if ($preprocess_c_cmd[$index] eq "-ignore" and $index + 1 < $#preprocess_c_cmd) { + splice(@preprocess_c_cmd, $index, 2); + next; + } + $index++; + } + if (grep /^-MM$/, @preprocess_c_cmd) { + system(@preprocess_c_cmd) == 0 or die "Error running preprocessor"; + exit 0; + } +} + +# if compiling, avoid creating an output file named '-.o' +if ((grep /^-c$/, @gcc_cmd) && !(grep /^-o/, @gcc_cmd)) { + foreach my $i (@gcc_cmd) { + if ($i =~ /\.[csS]$/) { + my $outputfile = $i; + $outputfile =~ s/\.[csS]$/.o/; + push(@gcc_cmd, "-o"); + push(@gcc_cmd, $outputfile); + last; + } + } +} +# replace only the '-o' argument with '-', avoids rewriting the make dependency +# target specified with -MT to '-' +my $index = 1; +while ($index < $#preprocess_c_cmd) { + if ($preprocess_c_cmd[$index] eq "-o") { + $index++; + $preprocess_c_cmd[$index] = "-"; + } + $index++; +} + +my $tempfile; +if ($as_type ne "armasm") { + @gcc_cmd = map { /\.[csS]$/ ? qw(-x assembler -) : $_ } @gcc_cmd; +} else { + @preprocess_c_cmd = grep ! /^-c$/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-m/, @preprocess_c_cmd; + + @preprocess_c_cmd = grep ! /^-G/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-W/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-Z/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-fp/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-EHsc$/, @preprocess_c_cmd; + @preprocess_c_cmd = grep ! /^-O/, @preprocess_c_cmd; + + @gcc_cmd = grep ! /^-G/, @gcc_cmd; + @gcc_cmd = grep ! /^-W/, @gcc_cmd; + @gcc_cmd = grep ! /^-Z/, @gcc_cmd; + @gcc_cmd = grep ! /^-fp/, @gcc_cmd; + @gcc_cmd = grep ! /^-EHsc$/, @gcc_cmd; + @gcc_cmd = grep ! /^-O/, @gcc_cmd; + + my @outfiles = grep /\.(o|obj)$/, @gcc_cmd; + $tempfile = $outfiles[0].".asm"; + + # Remove most parameters from gcc_cmd, which actually is the armasm command, + # which doesn't support any of the common compiler/preprocessor options. + @gcc_cmd = grep ! /^-D/, @gcc_cmd; + @gcc_cmd = grep ! /^-U/, @gcc_cmd; + @gcc_cmd = grep ! /^-m/, @gcc_cmd; + @gcc_cmd = grep ! /^-M/, @gcc_cmd; + @gcc_cmd = grep ! /^-c$/, @gcc_cmd; + @gcc_cmd = grep ! /^-I/, @gcc_cmd; + @gcc_cmd = map { /\.S$/ ? $tempfile : $_ } @gcc_cmd; +} + +# detect architecture from gcc binary name +if (!$arch) { + if ($gcc_cmd[0] =~ /(arm64|aarch64|arm|powerpc|ppc)/) { + $arch = $1; + } else { + # look for -arch flag + foreach my $i (1 .. $#gcc_cmd-1) { + if ($gcc_cmd[$i] eq "-arch" and + $gcc_cmd[$i+1] =~ /(arm64|aarch64|arm|powerpc|ppc)/) { + $arch = $1; + } + } + } +} + +# assume we're not cross-compiling if no -arch or the binary doesn't have the arch name +$arch = qx/arch/ if (!$arch); + +die "Unknown target architecture '$arch'" if not exists $canonical_arch{$arch}; + +$arch = $canonical_arch{$arch}; +$comm = $comments{$arch}; +my $inputcomm = $comm; +$comm = ";" if $as_type =~ /armasm/; + +my %ppc_spr = (ctr => 9, + vrsave => 256); + +open(INPUT, "-|", @preprocess_c_cmd) || die "Error running preprocessor"; + +if ($ENV{GASPP_DEBUG}) { + open(ASMFILE, ">&STDOUT"); +} else { + if ($as_type ne "armasm") { + open(ASMFILE, "|-", @gcc_cmd) or die "Error running assembler"; + } else { + open(ASMFILE, ">", $tempfile); + } +} + +my $current_macro = ''; +my $macro_level = 0; +my $rept_level = 0; +my %macro_lines; +my %macro_args; +my %macro_args_default; +my $macro_count = 0; +my $altmacro = 0; +my $in_irp = 0; + +my $num_repts; +my @rept_lines; + +my @irp_args; +my $irp_param; + +my @ifstack; + +my %symbols; + +my @sections; + +my %literal_labels; # for ldr , = +my $literal_num = 0; +my $literal_expr = ".word"; +$literal_expr = ".quad" if $arch eq "aarch64"; + +my $thumb = 0; + +my %thumb_labels; +my %call_targets; +my %mov32_targets; + +my %neon_alias_reg; +my %neon_alias_type; + +my $temp_label_next = 0; +my %last_temp_labels; +my %next_temp_labels; + +my %labels_seen; + +my %aarch64_req_alias; + +if ($force_thumb) { + parse_line(".thumb\n"); +} + +# pass 1: parse .macro +# note that the handling of arguments is probably overly permissive vs. gas +# but it should be the same for valid cases +while () { + # remove all comments (to avoid interfering with evaluating directives) + s/(? 0) { + $ifstack[-1] = -$ifstack[-1]; + } + return 1; + } elsif ($line =~ /\.else/) { + $ifstack[-1] = !$ifstack[-1]; + return 1; + } elsif (handle_if($line)) { + return 1; + } + } + + # discard lines in false .if blocks + foreach my $i (0 .. $#ifstack) { + if ($ifstack[$i] <= 0) { + return 1; + } + } + } + return 0; +} + +sub parse_line { + my $line = $_[0]; + + return if (parse_if_line($line)); + + if (scalar(@rept_lines) == 0) { + if (/\.macro/) { + $macro_level++; + if ($macro_level > 1 && !$current_macro) { + die "nested macros but we don't have master macro"; + } + } elsif (/\.endm/) { + $macro_level--; + if ($macro_level < 0) { + die "unmatched .endm"; + } elsif ($macro_level == 0) { + $current_macro = ''; + return; + } + } + } + + if ($macro_level == 0) { + if ($line =~ /\.(rept|irp)/) { + $rept_level++; + } elsif ($line =~ /.endr/) { + $rept_level--; + } + } + + if ($macro_level > 1) { + push(@{$macro_lines{$current_macro}}, $line); + } elsif (scalar(@rept_lines) and $rept_level >= 1) { + push(@rept_lines, $line); + } elsif ($macro_level == 0) { + expand_macros($line); + } else { + if ($line =~ /\.macro\s+([\d\w\.]+)\s*(.*)/) { + $current_macro = $1; + + # commas in the argument list are optional, so only use whitespace as the separator + my $arglist = $2; + $arglist =~ s/,/ /g; + + my @args = split(/\s+/, $arglist); + foreach my $i (0 .. $#args) { + my @argpair = split(/=/, $args[$i]); + $macro_args{$current_macro}[$i] = $argpair[0]; + $argpair[0] =~ s/:vararg$//; + $macro_args_default{$current_macro}{$argpair[0]} = $argpair[1]; + } + # ensure %macro_lines has the macro name added as a key + $macro_lines{$current_macro} = []; + + } elsif ($current_macro) { + push(@{$macro_lines{$current_macro}}, $line); + } else { + die "macro level without a macro name"; + } + } +} + +sub handle_set { + my $line = $_[0]; + if ($line =~ /\.set\s+(.*),\s*(.*)/) { + $symbols{$1} = eval_expr($2); + return 1; + } + return 0; +} + +sub expand_macros { + my $line = $_[0]; + + # handle .if directives; apple's assembler doesn't support important non-basic ones + # evaluating them is also needed to handle recursive macros + if (handle_if($line)) { + return; + } + + if (/\.purgem\s+([\d\w\.]+)/) { + delete $macro_lines{$1}; + delete $macro_args{$1}; + delete $macro_args_default{$1}; + return; + } + + if ($line =~ /\.altmacro/) { + $altmacro = 1; + return; + } + + if ($line =~ /\.noaltmacro/) { + $altmacro = 0; + return; + } + + $line =~ s/\%([^,]*)/eval_expr($1)/eg if $altmacro; + + # Strip out the .set lines from the armasm output + return if (handle_set($line) and $as_type eq "armasm"); + + if ($line =~ /\.rept\s+(.*)/) { + $num_repts = $1; + @rept_lines = ("\n"); + + # handle the possibility of repeating another directive on the same line + # .endr on the same line is not valid, I don't know if a non-directive is + if ($num_repts =~ s/(\.\w+.*)//) { + push(@rept_lines, "$1\n"); + } + $num_repts = eval_expr($num_repts); + } elsif ($line =~ /\.irp\s+([\d\w\.]+)\s*(.*)/) { + $in_irp = 1; + $num_repts = 1; + @rept_lines = ("\n"); + $irp_param = $1; + + # only use whitespace as the separator + my $irp_arglist = $2; + $irp_arglist =~ s/,/ /g; + $irp_arglist =~ s/^\s+//; + @irp_args = split(/\s+/, $irp_arglist); + } elsif ($line =~ /\.irpc\s+([\d\w\.]+)\s*(.*)/) { + $in_irp = 1; + $num_repts = 1; + @rept_lines = ("\n"); + $irp_param = $1; + + my $irp_arglist = $2; + $irp_arglist =~ s/,/ /g; + $irp_arglist =~ s/^\s+//; + @irp_args = split(//, $irp_arglist); + } elsif ($line =~ /\.endr/) { + my @prev_rept_lines = @rept_lines; + my $prev_in_irp = $in_irp; + my @prev_irp_args = @irp_args; + my $prev_irp_param = $irp_param; + my $prev_num_repts = $num_repts; + @rept_lines = (); + $in_irp = 0; + @irp_args = ''; + + if ($prev_in_irp != 0) { + foreach my $i (@prev_irp_args) { + foreach my $origline (@prev_rept_lines) { + my $line = $origline; + $line =~ s/\\$prev_irp_param/$i/g; + $line =~ s/\\\(\)//g; # remove \() + parse_line($line); + } + } + } else { + for (1 .. $prev_num_repts) { + foreach my $origline (@prev_rept_lines) { + my $line = $origline; + parse_line($line); + } + } + } + } elsif ($line =~ /(\S+:|)\s*([\w\d\.]+)\s*(.*)/ && exists $macro_lines{$2}) { + handle_serialized_line($1); + my $macro = $2; + + # commas are optional here too, but are syntactically important because + # parameters can be blank + my @arglist = split(/,/, $3); + my @args; + my @args_seperator; + + my $comma_sep_required = 0; + foreach (@arglist) { + # allow arithmetic/shift operators in macro arguments + $_ =~ s/\s*(\+|-|\*|\/|<<|>>|<|>)\s*/$1/g; + + my @whitespace_split = split(/\s+/, $_); + if (!@whitespace_split) { + push(@args, ''); + push(@args_seperator, ''); + } else { + foreach (@whitespace_split) { + #print ("arglist = \"$_\"\n"); + if (length($_)) { + push(@args, $_); + my $sep = $comma_sep_required ? "," : " "; + push(@args_seperator, $sep); + #print ("sep = \"$sep\", arg = \"$_\"\n"); + $comma_sep_required = 0; + } + } + } + + $comma_sep_required = 1; + } + + my %replacements; + if ($macro_args_default{$macro}){ + %replacements = %{$macro_args_default{$macro}}; + } + + # construct hashtable of text to replace + foreach my $i (0 .. $#args) { + my $argname = $macro_args{$macro}[$i]; + my @macro_args = @{ $macro_args{$macro} }; + if ($args[$i] =~ m/=/) { + # arg=val references the argument name + # XXX: I'm not sure what the expected behaviour if a lot of + # these are mixed with unnamed args + my @named_arg = split(/=/, $args[$i]); + $replacements{$named_arg[0]} = $named_arg[1]; + } elsif ($i > $#{$macro_args{$macro}}) { + # more args given than the macro has named args + # XXX: is vararg allowed on arguments before the last? + $argname = $macro_args{$macro}[-1]; + if ($argname =~ s/:vararg$//) { + #print "macro = $macro, args[$i] = $args[$i], args_seperator=@args_seperator, argname = $argname, arglist[$i] = $arglist[$i], arglist = @arglist, args=@args, macro_args=@macro_args\n"; + #$replacements{$argname} .= ", $args[$i]"; + $replacements{$argname} .= "$args_seperator[$i] $args[$i]"; + } else { + die "Too many arguments to macro $macro"; + } + } else { + $argname =~ s/:vararg$//; + $replacements{$argname} = $args[$i]; + } + } + + my $count = $macro_count++; + + # apply replacements as regex + foreach (@{$macro_lines{$macro}}) { + my $macro_line = $_; + # do replacements by longest first, this avoids wrong replacement + # when argument names are subsets of each other + foreach (reverse sort {length $a <=> length $b} keys %replacements) { + $macro_line =~ s/\\$_/$replacements{$_}/g; + } + if ($altmacro) { + foreach (reverse sort {length $a <=> length $b} keys %replacements) { + $macro_line =~ s/\b$_\b/$replacements{$_}/g; + } + } + $macro_line =~ s/\\\@/$count/g; + $macro_line =~ s/\\\(\)//g; # remove \() + parse_line($macro_line); + } + } else { + handle_serialized_line($line); + } +} + +sub is_arm_register { + my $name = $_[0]; + if ($name eq "lr" or + $name eq "ip" or + $name =~ /^[rav]\d+$/) { + return 1; + } + return 0; +} + +sub handle_local_label { + my $line = $_[0]; + my $num = $_[1]; + my $dir = $_[2]; + my $target = "$num$dir"; + if ($dir eq "b") { + $line =~ s/$target/$last_temp_labels{$num}/g; + } else { + my $name = "temp_label_$temp_label_next"; + $temp_label_next++; + push(@{$next_temp_labels{$num}}, $name); + $line =~ s/$target/$name/g; + } + return $line; +} + +sub handle_serialized_line { + my $line = $_[0]; + + # handle .previous (only with regard to .section not .subsection) + if ($line =~ /\.(section|text|const_data)/) { + push(@sections, $line); + } elsif ($line =~ /\.previous/) { + if (!$sections[-2]) { + die ".previous without a previous section"; + } + $line = $sections[-2]; + push(@sections, $line); + } + + $thumb = 1 if $line =~ /\.code\s+16|\.thumb/; + $thumb = 0 if $line =~ /\.code\s+32|\.arm/; + + # handle ldr , = + if ($line =~ /(.*)\s*ldr([\w\s\d]+)\s*,\s*=(.*)/ and $as_type ne "armasm") { + my $label = $literal_labels{$3}; + if (!$label) { + $label = "Literal_$literal_num"; + $literal_num++; + $literal_labels{$3} = $label; + } + $line = "$1 ldr$2, $label\n"; + } elsif ($line =~ /\.ltorg/ and $as_type ne "armasm") { + $line .= ".align 2\n"; + foreach my $literal (keys %literal_labels) { + $line .= "$literal_labels{$literal}:\n $literal_expr $literal\n"; + } + %literal_labels = (); + } + + # handle GNU as pc-relative relocations for adrp/add + if ($line =~ /(.*)\s*adrp([\w\s\d]+)\s*,\s*#?:pg_hi21:([^\s]+)/) { + $line = "$1 adrp$2, ${3}\@PAGE\n"; + } elsif ($line =~ /(.*)\s*add([\w\s\d]+)\s*,([\w\s\d]+)\s*,\s*#?:lo12:([^\s]+)/) { + $line = "$1 add$2, $3, ${4}\@PAGEOFF\n"; + } + + # thumb add with large immediate needs explicit add.w + if ($thumb and $line =~ /add\s+.*#([^@]+)/) { + $line =~ s/add/add.w/ if eval_expr($1) > 255; + } + + # mach-o local symbol names start with L (no dot) + $line =~ s/(? with ic as conditional code + if ($cond =~ /|$arm_cond_codes/) { + if (exists $thumb_labels{$label}) { + print ASMFILE ".thumb_func $label\n"; + } else { + $call_targets{$label}++; + } + } + } + + # @l -> lo16() @ha -> ha16() + $line =~ s/,\s+([^,]+)\@l\b/, lo16($1)/g; + $line =~ s/,\s+([^,]+)\@ha\b/, ha16($1)/g; + + # move to/from SPR + if ($line =~ /(\s+)(m[ft])([a-z]+)\s+(\w+)/ and exists $ppc_spr{$3}) { + if ($2 eq 'mt') { + $line = "$1${2}spr $ppc_spr{$3}, $4\n"; + } else { + $line = "$1${2}spr $4, $ppc_spr{$3}\n"; + } + } + + if ($line =~ /\.unreq\s+(.*)/) { + if (defined $neon_alias_reg{$1}) { + delete $neon_alias_reg{$1}; + delete $neon_alias_type{$1}; + return; + } elsif (defined $aarch64_req_alias{$1}) { + delete $aarch64_req_alias{$1}; + return; + } + } + # old gas versions store upper and lower case names on .req, + # but they remove only one on .unreq + if ($fix_unreq) { + if ($line =~ /\.unreq\s+(.*)/) { + $line = ".unreq " . lc($1) . "\n"; + $line .= ".unreq " . uc($1) . "\n"; + } + } + + if ($line =~ /(\w+)\s+\.(dn|qn)\s+(\w+)(?:\.(\w+))?(\[\d+\])?/) { + $neon_alias_reg{$1} = "$3$5"; + $neon_alias_type{$1} = $4; + return; + } + if (scalar keys %neon_alias_reg > 0 && $line =~ /^\s+v\w+/) { + # This line seems to possibly have a neon instruction + foreach (keys %neon_alias_reg) { + my $alias = $_; + # Require the register alias to match as an invididual word, not as a substring + # of a larger word-token. + if ($line =~ /\b$alias\b/) { + $line =~ s/\b$alias\b/$neon_alias_reg{$alias}/g; + # Add the type suffix. If multiple aliases match on the same line, + # only do this replacement the first time (a vfoo.bar string won't match v\w+). + $line =~ s/^(\s+)(v\w+)(\s+)/$1$2.$neon_alias_type{$alias}$3/; + } + } + } + + if ($arch eq "aarch64" or $as_type eq "armasm") { + # clang's integrated aarch64 assembler in Xcode 5 does not support .req/.unreq + if ($line =~ /\b(\w+)\s+\.req\s+(\w+)\b/) { + $aarch64_req_alias{$1} = $2; + return; + } + foreach (keys %aarch64_req_alias) { + my $alias = $_; + # recursively resolve aliases + my $resolved = $aarch64_req_alias{$alias}; + while (defined $aarch64_req_alias{$resolved}) { + $resolved = $aarch64_req_alias{$resolved}; + } + $line =~ s/\b$alias\b/$resolved/g; + } + } + if ($arch eq "aarch64") { + # fix missing aarch64 instructions in Xcode 5.1 (beta3) + # mov with vector arguments is not supported, use alias orr instead + if ($line =~ /^\s*mov\s+(v\d[\.{}\[\]\w]+),\s*(v\d[\.{}\[\]\w]+)\b\s*$/) { + $line = " orr $1, $2, $2\n"; + } + # movi 16, 32 bit shifted variant, shift is optional + if ($line =~ /^\s*movi\s+(v[0-3]?\d\.(?:2|4|8)[hsHS])\s*,\s*(#\w+)\b\s*$/) { + $line = " movi $1, $2, lsl #0\n"; + } + # Xcode 5 misses the alias uxtl. Replace it with the more general ushll. + # Clang 3.4 misses the alias sxtl too. Replace it with the more general sshll. + if ($line =~ /^\s*(s|u)xtl(2)?\s+(v[0-3]?\d\.[248][hsdHSD])\s*,\s*(v[0-3]?\d\.(?:2|4|8|16)[bhsBHS])\b\s*$/) { + $line = " $1shll$2 $3, $4, #0\n"; + } + # clang 3.4 does not automatically use shifted immediates in add/sub + if ($as_type eq "clang" and + $line =~ /^(\s*(?:add|sub)s?) ([^#l]+)#([\d\+\-\*\/ <>]+)\s*$/) { + my $imm = eval $3; + if ($imm > 4095 and not ($imm & 4095)) { + $line = "$1 $2#" . ($imm >> 12) . ", lsl #12\n"; + } + } + if ($ENV{GASPP_FIX_XCODE5}) { + if ($line =~ /^\s*bsl\b/) { + $line =~ s/\b(bsl)(\s+v[0-3]?\d\.(\w+))\b/$1.$3$2/; + $line =~ s/\b(v[0-3]?\d)\.$3\b/$1/g; + } + if ($line =~ /^\s*saddl2?\b/) { + $line =~ s/\b(saddl2?)(\s+v[0-3]?\d\.(\w+))\b/$1.$3$2/; + $line =~ s/\b(v[0-3]?\d)\.\w+\b/$1/g; + } + if ($line =~ /^\s*dup\b.*\]$/) { + $line =~ s/\bdup(\s+v[0-3]?\d)\.(\w+)\b/dup.$2$1/g; + $line =~ s/\b(v[0-3]?\d)\.[bhsdBHSD](\[\d\])$/$1$2/g; + } + } + } + + if ($as_type eq "armasm") { + # Also replace variables set by .set + foreach (keys %symbols) { + my $sym = $_; + $line =~ s/\b$sym\b/$symbols{$sym}/g; + } + + # Handle function declarations and keep track of the declared labels + if ($line =~ s/^\s*\.func\s+(\w+)/$1 PROC/) { + $labels_seen{$1} = 1; + } + + if ($line =~ s/^(\d+)://) { + # Convert local labels into unique labels. armasm (at least in + # RVCT) has something similar, but still different enough. + # By converting to unique labels we avoid any possible + # incompatibilities. + + my $num = $1; + foreach (@{$next_temp_labels{$num}}) { + $line = "$_\n" . $line; + } + @next_temp_labels{$num} = (); + my $name = "temp_label_$temp_label_next"; + $temp_label_next++; + # The matching regexp above removes the label from the start of + # the line (which might contain an instruction as well), readd + # it on a separate line above it. + $line = "$name:\n" . $line; + $last_temp_labels{$num} = $name; + } + + if ($line =~ s/^(\w+):/$1/) { + # Skip labels that have already been declared with a PROC, + # labels must not be declared multiple times. + return if (defined $labels_seen{$1}); + $labels_seen{$1} = 1; + } elsif ($line !~ /(\w+) PROC/) { + # If not a label, make sure the line starts with whitespace, + # otherwise ms armasm interprets it incorrectly. + $line =~ s/^[\.\w]/\t$&/; + } + + + # Check branch instructions + if ($line =~ /(?:^|\n)\s*(\w+\s*:\s*)?(bl?x?(..)?(\.w)?)\s+(\w+)/) { + my $instr = $2; + my $cond = $3; + my $width = $4; + my $target = $5; + # Don't interpret e.g. bic as b with ic as conditional code + if ($cond !~ /|$arm_cond_codes/) { + # Not actually a branch + } elsif ($target =~ /(\d+)([bf])/) { + # The target is a local label + $line = handle_local_label($line, $1, $2); + $line =~ s/\b$instr\b/$&.w/ if $width eq ""; + } elsif (!is_arm_register($target)) { + $call_targets{$target}++; + } + } elsif ($line =~ /^\s*.h?word.*\b\d+[bf]\b/) { + while ($line =~ /\b(\d+)([bf])\b/g) { + $line = handle_local_label($line, $1, $2); + } + } + + # ALIGN in armasm syntax is the actual number of bytes + if ($line =~ /\.align\s+(\d+)/) { + my $align = 1 << $1; + $line =~ s/\.align\s(\d+)/ALIGN $align/; + } + # Convert gas style [r0, :128] into armasm [r0@128] alignment specification + $line =~ s/\[([^\[]+),\s*:(\d+)\]/[$1\@$2]/g; + + # armasm treats logical values {TRUE} and {FALSE} separately from + # numeric values - logical operators and values can't be intermixed + # with numerical values. Evaluate ! and (a <> b) into numbers, + # let the assembler evaluate the rest of the expressions. This current + # only works for cases when ! and <> are used with actual constant numbers, + # we don't evaluate subexpressions here. + + # Evaluate ! + while ($line =~ /!\s*(\d+)/g) { + my $val = ($1 != 0) ? 0 : 1; + $line =~ s/!(\d+)/$val/; + } + # Evaluate (a > b) + while ($line =~ /\(\s*(\d+)\s*([<>])\s*(\d+)\s*\)/) { + my $val; + if ($2 eq "<") { + $val = ($1 < $3) ? 1 : 0; + } else { + $val = ($1 > $3) ? 1 : 0; + } + $line =~ s/\(\s*(\d+)\s*([<>])\s*(\d+)\s*\)/$val/; + } + + # Change a movw... #:lower16: into a mov32 pseudoinstruction + $line =~ s/^(\s*)movw(\s+\w+\s*,\s*)\#:lower16:(.*)$/$1mov32$2$3/; + # and remove the following, matching movt completely + $line =~ s/^\s*movt\s+\w+\s*,\s*\#:upper16:.*$//; + + if ($line =~ /^\s*mov32\s+\w+,\s*([a-zA-Z]\w*)/) { + $mov32_targets{$1}++; + } + + # Misc bugs/deficiencies: + # armasm seems unable to parse e.g. "vmov s0, s1" without a type + # qualifier, thus add .f32. + $line =~ s/^(\s+(?:vmov|vadd))(\s+s)/$1.f32$2/; + # armasm is unable to parse &0x - add spacing + $line =~ s/&0x/& 0x/g; + } + + if ($force_thumb) { + # Convert register post indexing to a separate add instruction. + # This converts e.g. "ldr r0, [r1], r2" into "ldr r0, [r1]", + # "add r1, r1, r2". + $line =~ s/(ldr|str)\s+(\w+),\s*\[(\w+)\],\s*(\w+)/$1 $2, [$3]\n\tadd $3, $3, $4/g; + + # Convert "mov pc, lr" into "bx lr", since the former only works + # for switching from arm to thumb (and only in armv7), but not + # from thumb to arm. + s/mov\s*pc\s*,\s*lr/bx lr/g; + + # Convert stmdb/ldmia with only one register into a plain str/ldr with post-increment/decrement + $line =~ s/stmdb\s+sp!\s*,\s*\{([^,-]+)\}/str $1, [sp, #-4]!/g; + $line =~ s/ldmia\s+sp!\s*,\s*\{([^,-]+)\}/ldr $1, [sp], #4/g; + + $line =~ s/\.arm/.thumb/x; + } + + # comment out unsupported directives + $line =~ s/\.type/$comm$&/x if $as_type =~ /^(apple-|armasm)/; + $line =~ s/\.func/$comm$&/x if $as_type =~ /^(apple-|clang)/; + $line =~ s/\.endfunc/$comm$&/x if $as_type =~ /^(apple-|clang)/; + $line =~ s/\.endfunc/ENDP/x if $as_type =~ /armasm/; + $line =~ s/\.ltorg/$comm$&/x if $as_type =~ /^(apple-|clang)/; + $line =~ s/\.ltorg/LTORG/x if $as_type eq "armasm"; + $line =~ s/\.size/$comm$&/x if $as_type =~ /^(apple-|armasm)/; + $line =~ s/\.fpu/$comm$&/x if $as_type =~ /^(apple-|armasm)/; + $line =~ s/\.arch/$comm$&/x if $as_type =~ /^(apple-|clang|armasm)/; + $line =~ s/\.object_arch/$comm$&/x if $as_type =~ /^(apple-|armasm)/; + $line =~ s/.section\s+.note.GNU-stack.*/$comm$&/x if $as_type =~ /^(apple-|armasm)/; + $line =~ s/\.hidden/$comm$&/x if $as_type =~ /^(apple-|clang|armasm)/; + + $line =~ s/\.syntax/$comm$&/x if $as_type =~ /armasm/; + + $line =~ s/\.hword/.short/x; + + if ($as_type =~ /^apple-/) { + # the syntax for these is a little different + $line =~ s/\.global/.globl/x; + # also catch .section .rodata since the equivalent to .const_data is .section __DATA,__const + $line =~ s/(.*)\.rodata/.const_data/x; + $line =~ s/\.int/.long/x; + $line =~ s/\.float/.single/x; + } + if ($as_type eq "armasm") { + $line =~ s/\.global/EXPORT/x; + $line =~ s/\.int/dcd/x; + $line =~ s/\.long/dcd/x; + $line =~ s/\.float/dcfs/x; + $line =~ s/\.word/dcd/x; + $line =~ s/\.short/dcw/x; + $line =~ s/\.byte/dcb/x; + $line =~ s/\.thumb/THUMB/x; + $line =~ s/\.arm/ARM/x; + # The alignment in AREA is the power of two, just as .align in gas + $line =~ s/\.text/AREA |.text|, CODE, READONLY, ALIGN=2, CODEALIGN/; + $line =~ s/(\s*)(.*)\.rodata/$1AREA |.rodata|, DATA, READONLY, ALIGN=5/; + + $line =~ s/fmxr/vmsr/; + $line =~ s/fmrx/vmrs/; + $line =~ s/fadds/vadd/; + } + + # catch unknown section names that aren't mach-o style (with a comma) + if ($as_type =~ /apple-/ and $line =~ /.section ([^,]*)$/) { + die ".section $1 unsupported; figure out the mach-o section name and add it"; + } + + print ASMFILE $line; +} + +if ($as_type ne "armasm") { + print ASMFILE ".text\n"; + print ASMFILE ".align 2\n"; + foreach my $literal (keys %literal_labels) { + print ASMFILE "$literal_labels{$literal}:\n $literal_expr $literal\n"; + } + + map print(ASMFILE ".thumb_func $_\n"), + grep exists $thumb_labels{$_}, keys %call_targets; +} else { + map print(ASMFILE "\tIMPORT $_\n"), + grep ! exists $labels_seen{$_}, (keys %call_targets, keys %mov32_targets); + + print ASMFILE "\tEND\n"; +} + +close(INPUT) or exit 1; +close(ASMFILE) or exit 1; +if ($as_type eq "armasm" and ! defined $ENV{GASPP_DEBUG}) { + system(@gcc_cmd) == 0 or die "Error running assembler"; +} + +END { + unlink($tempfile) if defined $tempfile; +} +#exit 1 diff --git a/xmake/tools/utils/vsenv.lua b/xmake/tools/utils/vsenv.lua new file mode 100644 index 000000000..28ddedb1a --- /dev/null +++ b/xmake/tools/utils/vsenv.lua @@ -0,0 +1,75 @@ +--!The Automatic Cross-platform Build Tool +-- +-- XMake is free software; you can redistribute it and/or modify +-- it under the terms of the GNU Lesser General Public License as published by +-- the Free Software Foundation; either version 2.1 of the License, or +-- (at your option) any later version. +-- +-- XMake is distributed in the hope that it will be useful, +-- but WITHOUT ANY WARRANTY; without even the implied warranty of +-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +-- GNU Lesser General Public License for more details. +-- +-- You should have received a copy of the GNU Lesser General Public License +-- along with XMake; +-- If not, see http://www.gnu.org/licenses/ +-- +-- Copyright (C) 2015 - 2016, ruki All rights reserved. +-- +-- @author ruki +-- @file vsenv.lua +-- + +-- imports +import("core.project.config") + +-- enter the given environment +function _enter(name) + + -- get the pathes for the vs environment + local old = nil + local new = config.get("__vsenv_" .. name) + if new then + + -- get the current pathes + old = os.getenv(name) or "" + + -- append the current pathes + new = new .. ";" .. old + + -- update the pathes for the environment + os.setenv(name, new) + end + + -- return the previous environment + return old; +end + +-- leave the given environment +function _leave(name, old) + + -- restore the previous environment + if old then + os.setenv(name, old) + end +end + +-- enter the vs environment +function enter() + + _g.pathes = _enter("path") + _g.libs = _enter("lib") + _g.includes = _enter("include") + _g.libpathes = _enter("libpath") + +end + +-- leave the vs environment +function leave() + + _leave("path", _g.pathes) + _leave("lib", _g.libs) + _leave("include", _g.includes) + _leave("libpath", _g.libpathes) + +end -- cgit v1.3.1