mirror of
https://github.com/golang/go
synced 2024-11-24 22:57:57 -07:00
The Go programming language
6e211225d7
CL 3075041 says ARM is not little-endian, but my test suggests otherwise. My test program is: package main import ("fmt"; "syscall"; "os") func main() { err := syscall.Fallocate(1, 1/*FALLOC_FL_KEEP_SIZE*/, 0, int64(40960)); fmt.Fprintln(os.Stderr, err) } Without this CL, ./test > testfile will show: file too large; and strace shows: fallocate(1, 01, 0, 175921860444160) = -1 EFBIG (File too large) With this CL, ./test > testfile will show: <nil>; and strace shows: fallocate(1, 01, 0, 40960) = 0 Quoting rsc: "[It turns out that] ARM syscall ABI requires 64-bit arguments to use an (even, odd) register pair, not an (odd, even) pair. Switching to "big-endian" worked because it ended up using the high 32-bits (always zero in the tests we had) as the padding word, because the 64-bit argument was the last one, and because we fill in zeros for the rest of the system call arguments, up to six. So it happened to work." I updated mksyscall_linux.pl to accommodate the register pair ABI requirement, and removed all hand-tweaked syscall routines in favor of the auto-generated ones. These including: Ftruncate, Truncate, Pread and Pwrite. Some recent Linux/ARM distributions do not bundle kernel asm headers, so instead we always get latest asm/unistd.h from git.kernel.org (just like what we do for FreeBSD). R=ken, r, rsc, r, dave, iant CC=golang-dev https://golang.org/cl/5726051 |
||
---|---|---|
doc | ||
include | ||
lib | ||
misc | ||
src | ||
test | ||
.hgignore | ||
.hgtags | ||
AUTHORS | ||
CONTRIBUTORS | ||
favicon.ico | ||
LICENSE | ||
PATENTS | ||
README | ||
robots.txt |
This is the source code repository for the Go programming language. For documentation about how to install and use Go, visit http://golang.org/ or load doc/install.html in your web browser. After installing Go, you can view a nicely formatted doc/install.html by running godoc --http=:6060 and then visiting http://localhost:6060/doc/install.html. Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file. -- Binary Distribution Notes If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this README). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install.html). You should also add the Go binary directory $GOROOT/bin to your shell's path. For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile: export GOROOT=$HOME/go export PATH=$PATH:$GOROOT/bin See doc/install.html for more details.