cgo: add support for stdio in picolibc and wasi-libc

This adds support for stdio in picolibc and fixes wasm_exec.js so that
it can also support C puts. With this, C stdout works on all supported
platforms.
This commit is contained in:
Ayke van Laethem
2021-09-24 01:39:56 +02:00
committed by Ron Evans
parent 1645f45c1a
commit 14bb90c3c0
11 changed files with 158 additions and 7 deletions
+3 -3
View File
@@ -5,6 +5,7 @@ import (
"debug/elf"
"encoding/binary"
"errors"
"fmt"
"io"
"os"
"path/filepath"
@@ -49,7 +50,7 @@ func makeArchive(archivePath string, objs []string) error {
// Read the symbols and add them to the symbol table.
dbg, err := elf.NewFile(objfile)
if err != nil {
return err
return fmt.Errorf("failed to open file %s: %w", objpath, err)
}
symbols, err := dbg.Symbols()
if err != nil {
@@ -61,9 +62,8 @@ func makeArchive(archivePath string, objs []string) error {
// Don't include local symbols (STB_LOCAL).
continue
}
if elf.ST_TYPE(symbol.Info) != elf.STT_FUNC {
if elf.ST_TYPE(symbol.Info) != elf.STT_FUNC && elf.ST_TYPE(symbol.Info) != elf.STT_OBJECT {
// Not a function.
// TODO: perhaps globals variables should also be included?
continue
}
// Include in archive.
+111 -1
View File
@@ -12,7 +12,18 @@ var Picolibc = Library{
name: "picolibc",
cflags: func() []string {
picolibcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/picolibc/newlib/libc")
return []string{"-Werror", "-Wall", "-std=gnu11", "-D_COMPILING_NEWLIB", "-nostdlibinc", "-Xclang", "-internal-isystem", "-Xclang", picolibcDir + "/include", "-I" + picolibcDir + "/tinystdio", "-I" + goenv.Get("TINYGOROOT") + "/lib/picolibc-include"}
return []string{
"-Werror",
"-Wall",
"-std=gnu11",
"-D_COMPILING_NEWLIB",
"-DHAVE_ALIAS_ATTRIBUTE",
"-DTINY_STDIO",
"-nostdlibinc",
"-Xclang", "-internal-isystem", "-Xclang", picolibcDir + "/include",
"-I" + picolibcDir + "/tinystdio",
"-I" + goenv.Get("TINYGOROOT") + "/lib/picolibc-include",
}
},
sourceDir: "lib/picolibc/newlib/libc",
sources: func(target string) []string {
@@ -21,6 +32,105 @@ var Picolibc = Library{
}
var picolibcSources = []string{
"../../../picolibc-stdio.c",
"tinystdio/asprintf.c",
"tinystdio/atod_engine.c",
"tinystdio/atod_ryu.c",
"tinystdio/atof_engine.c",
"tinystdio/atof_ryu.c",
//"tinystdio/atold_engine.c", // have_long_double and not long_double_equals_double
"tinystdio/clearerr.c",
"tinystdio/compare_exchange.c",
"tinystdio/dtoa_data.c",
"tinystdio/dtoa_engine.c",
"tinystdio/dtoa_ryu.c",
"tinystdio/ecvtbuf.c",
"tinystdio/ecvt.c",
"tinystdio/ecvt_data.c",
"tinystdio/ecvtfbuf.c",
"tinystdio/ecvtf.c",
"tinystdio/ecvtf_data.c",
"tinystdio/exchange.c",
//"tinystdio/fclose.c", // posix-io
"tinystdio/fcvtbuf.c",
"tinystdio/fcvt.c",
"tinystdio/fcvtfbuf.c",
"tinystdio/fcvtf.c",
"tinystdio/fdevopen.c",
//"tinystdio/fdopen.c", // posix-io
"tinystdio/feof.c",
"tinystdio/ferror.c",
"tinystdio/fflush.c",
"tinystdio/fgetc.c",
"tinystdio/fgets.c",
"tinystdio/fileno.c",
"tinystdio/filestrget.c",
"tinystdio/filestrputalloc.c",
"tinystdio/filestrput.c",
//"tinystdio/fopen.c", // posix-io
"tinystdio/fprintf.c",
"tinystdio/fputc.c",
"tinystdio/fputs.c",
"tinystdio/fread.c",
"tinystdio/fscanf.c",
"tinystdio/fseek.c",
"tinystdio/ftell.c",
"tinystdio/ftoa_data.c",
"tinystdio/ftoa_engine.c",
"tinystdio/ftoa_ryu.c",
"tinystdio/fwrite.c",
"tinystdio/gcvtbuf.c",
"tinystdio/gcvt.c",
"tinystdio/gcvtfbuf.c",
"tinystdio/gcvtf.c",
"tinystdio/getchar.c",
"tinystdio/gets.c",
"tinystdio/matchcaseprefix.c",
"tinystdio/perror.c",
//"tinystdio/posixiob.c", // posix-io
//"tinystdio/posixio.c", // posix-io
"tinystdio/printf.c",
"tinystdio/putchar.c",
"tinystdio/puts.c",
"tinystdio/ryu_divpow2.c",
"tinystdio/ryu_log10.c",
"tinystdio/ryu_log2pow5.c",
"tinystdio/ryu_pow5bits.c",
"tinystdio/ryu_table.c",
"tinystdio/ryu_umul128.c",
"tinystdio/scanf.c",
"tinystdio/setbuf.c",
"tinystdio/setvbuf.c",
//"tinystdio/sflags.c", // posix-io
"tinystdio/snprintf.c",
"tinystdio/snprintfd.c",
"tinystdio/snprintff.c",
"tinystdio/sprintf.c",
"tinystdio/sprintfd.c",
"tinystdio/sprintff.c",
"tinystdio/sscanf.c",
"tinystdio/strfromd.c",
"tinystdio/strfromf.c",
"tinystdio/strtod.c",
"tinystdio/strtod_l.c",
"tinystdio/strtof.c",
//"tinystdio/strtold.c", // have_long_double and not long_double_equals_double
//"tinystdio/strtold_l.c", // have_long_double and not long_double_equals_double
"tinystdio/ungetc.c",
"tinystdio/vasprintf.c",
"tinystdio/vfiprintf.c",
"tinystdio/vfiscanf.c",
"tinystdio/vfprintf.c",
"tinystdio/vfprintff.c",
"tinystdio/vfscanf.c",
"tinystdio/vfscanff.c",
"tinystdio/vprintf.c",
"tinystdio/vscanf.c",
"tinystdio/vsnprintf.c",
"tinystdio/vsprintf.c",
"tinystdio/vsscanf.c",
"string/bcmp.c",
"string/bcopy.c",
"string/bzero.c",