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Shenghou Ma 6e211225d7 syscall: fix mkall.sh, mksyscall_linux.pl, and regen for Linux/ARM
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
2012-03-06 03:12:11 +08:00
doc doc: fix download link on front page 2012-03-05 17:07:10 +11:00
include build: remove unnecessary pragmas 2012-02-06 12:45:23 -05:00
lib godoc: support $GOPATH, simplify file system code 2012-03-05 10:02:46 -05:00
misc builder: use short test for subrepos 2012-03-05 23:16:11 +08:00
src syscall: fix mkall.sh, mksyscall_linux.pl, and regen for Linux/ARM 2012-03-06 03:12:11 +08:00
test cmd/gc: must not inline panic, recover 2012-03-05 13:51:44 -05:00
.hgignore build: remove old version*.go files from hgignore 2012-02-20 02:49:58 -08:00
.hgtags tag weekly.2012-03-04 2012-03-05 16:09:13 +11:00
AUTHORS A+C: add Francisco Souza 2012-03-04 11:34:10 +11:00
CONTRIBUTORS A+C: add Francisco Souza 2012-03-04 11:34:10 +11:00
favicon.ico add a favicon plus a couple of hi-res versions of gordon 2009-10-26 10:13:07 -07:00
LICENSE LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README build: update, streamline documentation for new $GOBIN 2010-08-24 20:00:50 -04:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

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