GNU bug report logs - #41264
Bootstrap packages fail to build due to mes-libc lacking 'stat64' etc. syscalls

Previous Next

Full log

View this message in rfc822 format

From: Mathieu Othacehe <othacehe <at> gnu.org>
To: 41264 <at> debbugs.gnu.org
Subject: bug#41264: Bootstrap packages fail to build.
Date: Tue, 19 May 2020 10:52:28 +0200

Hello,

> So stat, lstat, and all other related function will return -EOVERFLOW
> unless their 64 bits stat64, lstat64 counterpart is used.
>
> So I think this means that one cannot build the Guix bootstrap toolchain on an
> NVME disk.

After further investigations I think that it is needed to patch GNU Mes
to fix this bug.

We would need to add three new syscalls for x86:

--8<---------------cut here---------------start------------->8---
#define SYS_stat64    0xc3
#define SYS_lstat64   0xc4
#define SYS_fstat64   0xc5
--8<---------------cut here---------------end--------------->8---

lib/linux/stat.c should be modified this way:

--8<---------------cut here---------------start------------->8---
#if __i386__
#define STAT_SYSCALL SYS_stat64
#else
#define STAT_SYSCALL SYS_stat
#endif

int
stat (char const *file_name, struct stat *statbuf)
{
  struct stat64 statbuf64;
  int ret;

  ret = _sys_call2 (STAT_SYSCALL, (long) file_name, (long) &statbuf64);

#if __i386__
  stat64_to_32(&statbuf64, statbuf);
#else
  *statbuf = statbuf64;
#endif

  return ret;
}
--8<---------------cut here---------------end--------------->8---

Then we would need to create stat64_to_32 which could be inspired from
__xstat64_conv from the glibc. Then, lstat and fstat64 would need to be
patched the same way.

This way, we would replicate the glibc behavior.

Thanks,

Mathieu

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.