8529f613b6
Admittedly this is something that the compiler should be able to just do for us, but gcc just isn't that smart. And trying to use a structure initializer (which would get us the right semantics) ends up resulting in gcc allocating stack space for _two_ 'struct stat', and then copying one into the other. So do it by hand - just have a per-architecture macro that initializes the padding fields. And if the architecture doesn't provide one, fall back to the old behavior of just doing the whole memset() first. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
#ifndef _ASM_X86_STAT_H
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#define _ASM_X86_STAT_H
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#define STAT_HAVE_NSEC 1
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#ifdef __i386__
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struct stat {
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unsigned long st_dev;
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unsigned long st_ino;
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unsigned short st_mode;
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unsigned short st_nlink;
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unsigned short st_uid;
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unsigned short st_gid;
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unsigned long st_rdev;
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unsigned long st_size;
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unsigned long st_blksize;
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unsigned long st_blocks;
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unsigned long st_atime;
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unsigned long st_atime_nsec;
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unsigned long st_mtime;
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unsigned long st_mtime_nsec;
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unsigned long st_ctime;
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unsigned long st_ctime_nsec;
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unsigned long __unused4;
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unsigned long __unused5;
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};
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/* We don't need to memset the whole thing just to initialize the padding */
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#define INIT_STRUCT_STAT_PADDING(st) do { \
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st.__unused4 = 0; \
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st.__unused5 = 0; \
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} while (0)
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#define STAT64_HAS_BROKEN_ST_INO 1
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/* This matches struct stat64 in glibc2.1, hence the absolutely
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* insane amounts of padding around dev_t's.
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*/
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struct stat64 {
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unsigned long long st_dev;
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unsigned char __pad0[4];
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unsigned long __st_ino;
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unsigned int st_mode;
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unsigned int st_nlink;
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unsigned long st_uid;
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unsigned long st_gid;
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unsigned long long st_rdev;
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unsigned char __pad3[4];
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long long st_size;
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unsigned long st_blksize;
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/* Number 512-byte blocks allocated. */
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unsigned long long st_blocks;
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unsigned long st_atime;
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unsigned long st_atime_nsec;
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unsigned long st_mtime;
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unsigned int st_mtime_nsec;
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unsigned long st_ctime;
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unsigned long st_ctime_nsec;
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unsigned long long st_ino;
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};
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/* We don't need to memset the whole thing just to initialize the padding */
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#define INIT_STRUCT_STAT64_PADDING(st) do { \
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memset(&st.__pad0, 0, sizeof(st.__pad0)); \
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memset(&st.__pad3, 0, sizeof(st.__pad3)); \
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} while (0)
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#else /* __i386__ */
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struct stat {
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unsigned long st_dev;
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unsigned long st_ino;
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unsigned long st_nlink;
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unsigned int st_mode;
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unsigned int st_uid;
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unsigned int st_gid;
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unsigned int __pad0;
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unsigned long st_rdev;
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long st_size;
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long st_blksize;
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long st_blocks; /* Number 512-byte blocks allocated. */
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unsigned long st_atime;
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unsigned long st_atime_nsec;
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unsigned long st_mtime;
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unsigned long st_mtime_nsec;
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unsigned long st_ctime;
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unsigned long st_ctime_nsec;
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long __unused[3];
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};
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/* We don't need to memset the whole thing just to initialize the padding */
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#define INIT_STRUCT_STAT_PADDING(st) do { \
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st.__pad0 = 0; \
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st.__unused[0] = 0; \
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st.__unused[1] = 0; \
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st.__unused[2] = 0; \
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} while (0)
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#endif
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/* for 32bit emulation and 32 bit kernels */
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struct __old_kernel_stat {
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unsigned short st_dev;
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unsigned short st_ino;
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unsigned short st_mode;
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unsigned short st_nlink;
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unsigned short st_uid;
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unsigned short st_gid;
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unsigned short st_rdev;
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#ifdef __i386__
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unsigned long st_size;
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unsigned long st_atime;
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unsigned long st_mtime;
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unsigned long st_ctime;
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#else
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unsigned int st_size;
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unsigned int st_atime;
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unsigned int st_mtime;
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unsigned int st_ctime;
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#endif
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};
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#endif /* _ASM_X86_STAT_H */
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