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-rw-r--r--packages/uclibc/files/armeb-kernel-stat.h.patch125
1 files changed, 125 insertions, 0 deletions
diff --git a/packages/uclibc/files/armeb-kernel-stat.h.patch b/packages/uclibc/files/armeb-kernel-stat.h.patch
index e69de29bb2..0440718eec 100644
--- a/packages/uclibc/files/armeb-kernel-stat.h.patch
+++ b/packages/uclibc/files/armeb-kernel-stat.h.patch
@@ -0,0 +1,125 @@
+# The 2.6 asm/stat.h for ARM has some rather unusual transmogrifications
+# for big-endian running. This patch adds ARM specific code in xstatconv.c
+# which deals with the 2.4->2.6 ABI change.
+--- uClibc-0.9.27/libc/sysdeps/linux/common/xstatconv.c 2005-01-11 23:59:21.000000000 -0800
++++ uClibc-0.9.27/libc/sysdeps/linux/common/xstatconv.c 2005-06-05 11:03:56.742587966 -0700
+@@ -18,7 +18,14 @@
+ 02111-1307 USA.
+
+ Modified for uClibc by Erik Andersen <andersen@codepoet.org>
++ Further modified for ARMBE by John Bowler <jbowler@acm.org>
+ */
++/* This is a copy of common/xstatconv.c with a fixup for the ABI
++ * (structure layout) change in ARM Linux 2.6 - this shifts the
++ * st_dev and st_rdev information from the start of the 8 byte
++ * space to the end on big-endian ARM (only). The code is unchanged
++ * on little endian.
++ */
+
+ #define _GNU_SOURCE
+ #define _LARGEFILE64_SOURCE
+@@ -32,6 +39,84 @@
+ #include <sys/stat.h>
+ #include "xstatconv.h"
+
++/* Only for ARMEB and LFS. */
++#if defined(__ARMEB__) && defined(__UCLIBC_HAS_LFS__)
++/* stat64 (renamed) from 2.6.11.11. What happened here is that after
++ * Linux 2.4 the 2.4 unsigned short st_rdev and st_dev fields were
++ * lengthened to unsigned long long - causing the inclusion of at least
++ * some of the 0 padding bytes which followed them. On little endian
++ * this is fine because 2.4 did zero the pad bytes (I think) and the
++ * position of the data did not change. On big endian the change
++ * shifted the data to the end of the field. Someone noticed for the
++ * struct stat, and the armeb (big endian) case preserved the
++ * unsigned short (yuck), but no so for stat64 (maybe this was deliberate,
++ * but there is no evidence in the code of this.) Consequently a
++ * fixup is necessary for the stat64 case. The fixup here is to
++ * use the new structure when the change is detected. See below.
++ */
++struct __kernel_stat64_armeb {
++ /* This definition changes the layout on big-endian from that
++ * used in 2.4.31 - ABI change! Likewise for st_rdev.
++ */
++ unsigned long long st_dev;
++ unsigned char __pad0[4];
++ unsigned long __st_ino;
++ unsigned int st_mode;
++ unsigned int st_nlink;
++ unsigned long st_uid;
++ unsigned long st_gid;
++ unsigned long long st_rdev;
++ unsigned char __pad3[4];
++ long long st_size;
++ unsigned long st_blksize;
++ unsigned long __pad4;
++ unsigned long st_blocks;
++ unsigned long st_atime;
++ unsigned long st_atime_nsec;
++ unsigned long st_mtime;
++ unsigned long st_mtime_nsec;
++ unsigned long st_ctime;
++ unsigned long st_ctime_nsec;
++ unsigned long long st_ino;
++};
++
++/* This fixup only works so long as the old struct stat64 is no
++ * smaller than the new one - the caller of xstatconv uses the
++ * *old* struct, but the kernel writes the new one. CASSERT
++ * detects this at compile time.
++ */
++#define CASSERT(c) do switch (0) { case 0:; case (c):; } while (0)
++
++void __xstat64_conv_new(struct __kernel_stat64_armeb *kbuf, struct stat64 *buf)
++{
++ CASSERT(sizeof *kbuf <= sizeof (struct kernel_stat64));
++
++ /* Convert from new kernel version of `struct stat64'. */
++ buf->st_dev = kbuf->st_dev;
++ buf->st_ino = kbuf->st_ino;
++#ifdef _HAVE_STAT64___ST_INO
++ buf->__st_ino = kbuf->__st_ino;
++#endif
++ buf->st_mode = kbuf->st_mode;
++ buf->st_nlink = kbuf->st_nlink;
++ buf->st_uid = kbuf->st_uid;
++ buf->st_gid = kbuf->st_gid;
++ buf->st_rdev = kbuf->st_rdev;
++ buf->st_size = kbuf->st_size;
++ buf->st_blksize = kbuf->st_blksize;
++ buf->st_blocks = kbuf->st_blocks;
++ buf->st_atime = kbuf->st_atime;
++ buf->st_mtime = kbuf->st_mtime;
++ buf->st_ctime = kbuf->st_ctime;
++}
++#define _MAY_HAVE_NEW_STAT64 1
++#else
++#define _MAY_HAVE_NEW_STAT64 0
++#endif
++
++/* The following is taken verbatim from xstatconv.c apart from
++ * the addition of the _MAY_HAVE_NEW_STAT64 code.
++ */
+ void __xstat_conv(struct kernel_stat *kbuf, struct stat *buf)
+ {
+ /* Convert to current kernel version of `struct stat'. */
+@@ -53,6 +138,19 @@
+ #if defined __UCLIBC_HAS_LFS__
+ void __xstat64_conv(struct kernel_stat64 *kbuf, struct stat64 *buf)
+ {
++# if _MAY_HAVE_NEW_STAT64
++ /* This relies on any device (0,0) not being mountable - i.e.
++ * it fails on Linux 2.4 if dev(0,0) is a mountable block file
++ * system and itself contains it's own device. That doesn't
++ * happen on Linux 2.4 so far as I can see, but even if it
++ * does the API only fails (even then) if 2.4 didn't set all
++ * of the pad bytes to 0 (and it does set them to zero.)
++ */
++ if (kbuf->st_dev == 0 && kbuf->st_rdev == 0) {
++ __xstat64_conv_new((struct __kernel_stat64_armeb*)kbuf, buf);
++ return;
++ }
++# endif
+ /* Convert to current kernel version of `struct stat64'. */
+ buf->st_dev = kbuf->st_dev;
+ buf->st_ino = kbuf->st_ino;