diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/syscall/mksyscall.awk')
| -rw-r--r-- | gcc-4.8.1/libgo/go/syscall/mksyscall.awk | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/gcc-4.8.1/libgo/go/syscall/mksyscall.awk b/gcc-4.8.1/libgo/go/syscall/mksyscall.awk deleted file mode 100644 index 74f0e28af..000000000 --- a/gcc-4.8.1/libgo/go/syscall/mksyscall.awk +++ /dev/null @@ -1,295 +0,0 @@ -# Copyright 2011 The Go Authors. All rights reserved. -# Use of this source code is governed by a BSD-style -# license that can be found in the LICENSE file. - -# This AWK script reads a Go file with comments describing syscall -# functions and the C routines they map to. It generates the Go code -# which calls the C routines. - -# The syscall functins are marked by lines beginning with "//sys" and -# read like func declarations if //sys is replaced by func, but: -# * The parameter lists must give a name for each argument. -# This includes return parameters. -# * The parameter lists must give a type for each argument: -# the (x, y, z int) shorthand is not allowed. -# * If the return parameter is an error, it must be named err. - -# A line beginning with //sysnb is like //sys, except that the -# goroutine will not be suspended during the execution of the library -# call. This must only be used for library calls which can never -# block, as otherwise the library call could cause all goroutines to -# hang. - -# After the //sys or //sysnb line comes a second line which describes -# the C function. The name must be the name of the function in the C -# library, and may be the same as the Go function. The limitations on -# the argument list are the same as for the //sys line, but there must -# be at most one result parameter, and it must be given as just a -# type, without a name. - -BEGIN { - print "// This file was automatically generated by mksyscall.awk" - print "" - print "package syscall" - print "" - print "import \"unsafe\"" - print "" - status = 0 -} - -/^\/\/sys/ { - if ($1 == "//sysnb") { - blocking = 0 - } else { - blocking = 1 - } - - line = $0 - - if (match(line, "//sys(nb)?[ ]*[a-zA-Z0-9_]+\\([^()]*\\) *(\\(([^()]+)\\))?") == 0) { - print "unmatched line:", $0 | "cat 1>&2" - status = 1 - next - } - - # Sets a[1] = //sysnb, a[2] == function name. - split(line, a, "[ (]*") - gofnname = a[2] - - off = match(line, "\\([^()]*\\)") - end = index(substr(line, off, length(line) - off + 1), ")") - gofnparams = substr(line, off + 1, end - 2) - - line = substr(line, off + end, length(line) - (off + end) + 1) - off = match(line, "\\([^()]*\\)") - if (off == 0) { - gofnresults = "" - } else { - end = index(substr(line, off, length(line) - off + 1), ")") - gofnresults = substr(line, off + 1, end - 2) - } - - getline - line = $0 - - if (match(line, "//[a-zA-Z0-9_]+\\([^()]*\\)") == 0) { - print "unmatched C line", $0, "after", gofnname | "cat 1>&2" - status = 1 - next - } - - split(line, a, "[ (]*") - cfnname = substr(a[1], 3, length(a[1]) - 2) - - off = match(line, "\\([^()]*\\)") - end = index(substr(line, off, length(line) - off + 1), ")") - cfnparams = substr(line, off + 1, end - 2) - - line = substr(line, off + end + 1, length(line) - (off + end) + 1) - while (substr(line, 1, 1) == " ") { - line = substr(line, 2, length(line) - 1) - } - end = index(line, " ") - if (end != 0) { - line = substr(line, 1, end) - } - cfnresult = line - - printf("// Automatically generated wrapper for %s/%s\n", gofnname, cfnname) - printf("//extern %s\n", cfnname) - printf("func c_%s(%s) %s\n", cfnname, cfnparams, cfnresult) - printf("func %s(%s) %s%s%s%s{\n", - gofnname, gofnparams, gofnresults == "" ? "" : "(", gofnresults, - gofnresults == "" ? "" : ")", gofnresults == "" ? "" : " ") - - loc = gofnname "/" cfnname ":" - - haserr = 0 - if (gofnresults != "") { - fields = split(gofnresults, goresults, ", *") - for (goresult = 1; goresults[goresult] != ""; goresult++) { - if (split(goresults[goresult], goparam) == 2) { - if (goparam[1] == "err") { - haserr = 1 - break - } - } - } - } - - split(gofnparams, goargs, ", *") - split(cfnparams, cargs, ", *") - args = "" - carg = 1 - for (goarg = 1; goargs[goarg] != ""; goarg++) { - if (cargs[carg] == "") { - print loc, "not enough C parameters" - } - - if (args != "") { - args = args ", " - } - - if (split(goargs[goarg], a) != 2) { - print loc, "bad parameter:", goargs[goarg] | "cat 1>&2" - status = 1 - next - } - - goname = a[1] - gotype = a[2] - - if (split(cargs[carg], a) != 2) { - print loc, "bad C parameter:", cargs[carg] | "cat 1>&2" - status = 1 - next - } - - ctype = a[2] - - if (gotype ~ /^\*/) { - if (gotype != ctype) { - print loc, "Go/C pointer type mismatch:", gotype, ctype | "cat 1>&2" - status = 1 - next - } - args = args goname - } else if (gotype == "string") { - if (ctype != "*byte") { - print loc, "Go string not matched to C *byte:", gotype, ctype | "cat 1>&2" - status = 1 - next - } - printf("\tvar _p%d *byte\n", goarg) - if (haserr) { - printf("\t_p%d, err = BytePtrFromString(%s)\n", goarg, goname) - printf("\tif err != nil {\n\t\treturn\n\t}\n") - } else { - print loc, "uses string arguments but has no error return" | "cat 1>&2" - printf("\t_p%d, _ = BytePtrFromString(%s)\n", goarg, goname) - } - args = sprintf("%s_p%d", args, goarg) - } else if (gotype ~ /^\[\](.*)/) { - if (ctype !~ /^\*/ || cargs[carg + 1] == "") { - print loc, "bad C type for slice:", gotype, ctype | "cat 1>&2" - status = 1 - next - } - - # Convert a slice into a pair of pointer, length. - # Don't try to take the address of the zeroth element of a - # nil slice. - printf("\tvar _p%d %s\n", goarg, ctype) - printf("\tif len(%s) > 0 {\n", goname) - printf("\t\t_p%d = (%s)(unsafe.Pointer(&%s[0]))\n", goarg, ctype, goname) - printf("\t} else {\n") - printf("\t\t_p%d = (%s)(unsafe.Pointer(&_zero))\n", goarg, ctype) - printf("\t}\n") - - ++carg - if (split(cargs[carg], cparam) != 2) { - print loc, "bad C parameter:", cargs[carg] | "cat 1>&2" - status = 1 - next - } - - args = sprintf("%s_p%d, %s(len(%s))", args, goarg, cparam[2], goname) - } else if (gotype == "uintptr" && ctype ~ /^\*/) { - args = sprintf("%s(%s)(unsafe.Pointer(%s))", args, ctype, goname) - } else { - args = sprintf("%s%s(%s)", args, ctype, goname) - } - - carg++ - } - - if (cargs[carg] != "") { - print loc, "too many C parameters" | "cat 1>&2" - status = 1 - next - } - - if (blocking) { - print "\tEntersyscall()" - } - - printf("\t") - if (gofnresults != "") { - printf("_r := ") - } - printf("c_%s(%s)\n", cfnname, args) - - seterr = 0 - if (gofnresults != "") { - fields = split(gofnresults, goresults, ", *") - if (fields > 2) { - print loc, "too many Go results" | "cat 1>&2" - status = 1 - next - } - usedr = 0 - for (goresult = 1; goresults[goresult] != ""; goresult++) { - if (split(goresults[goresult], goparam) != 2) { - print loc, "bad result:", goresults[goresult] | "cat 1>&2" - status = 1 - next - } - - goname = goparam[1] - gotype = goparam[2] - - if (goname == "err") { - print "\tvar errno Errno" - print "\tsetErrno := false" - if (cfnresult ~ /^\*/) { - print "\tif _r == nil {" - } else { - print "\tif _r < 0 {" - } - print "\t\terrno = GetErrno()" - print "\t\tsetErrno = true" - print "\t}" - seterr = 1 - } else if (gotype == "uintptr" && cfnresult ~ /^\*/) { - printf("\t%s = (%s)(unsafe.Pointer(_r))\n", goname, gotype) - } else { - if (usedr) { - print loc, "two parameters but no errno parameter" | "cat 1>&2" - status = 1 - next - } - printf("\t%s = (%s)(_r)\n", goname, gotype) - usedr = 1 - } - } - } - - if (blocking) { - print "\tExitsyscall()" - } - - if (seterr) { - print "\tif setErrno {" - print "\t\terr = errno" - print "\t}" - } - - if (gofnresults != "") { - print "\treturn" - } - - print "}" - - print "" - - next -} - -{ next } - -END { - if (status != 0) { - print "*** mksyscall.awk failed" | "cat 1>&2" - exit status - } -} |