diff options
Diffstat (limited to 'packages/uclibc/files/armeb-kernel-stat.h.patch')
| -rw-r--r-- | packages/uclibc/files/armeb-kernel-stat.h.patch | 125 |
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; |