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| author | Nicolas Pitre <nico@cam.org> | 2006-01-14 16:35:03 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-01-14 16:35:03 +0000 |
| commit | 713c481519f19df9e6d90f257e7da0336b057592 (patch) | |
| tree | b8242d9f1b94f94a7075a021a3f80ddf0c0de25c | |
| parent | 704bdda03827db8a551e82b312037d63ba3c22ff (diff) | |
| download | blackbird-obmc-linux-713c481519f19df9e6d90f257e7da0336b057592.tar.gz blackbird-obmc-linux-713c481519f19df9e6d90f257e7da0336b057592.zip | |
[ARM] 3108/2: old ABI compat: statfs64 and fstatfs64
Patch from Nicolas Pitre
struct statfs64 has extra padding with EABI growing its size from 84 to
88. This struct is now __attribute__((packed,aligned(4))) with a small
assembly wrapper to force the sz argument to 84 if it is 88 to avoid
copying the extra padding over user space memory unexpecting it.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/calls.S | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 10 | ||||
| -rw-r--r-- | include/asm-arm/statfs.h | 38 |
3 files changed, 49 insertions, 3 deletions
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index 55076a75e5bf..8c0bf04814b1 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -280,8 +280,8 @@ __syscall_start: .long sys_clock_gettime .long sys_clock_getres /* 265 */ .long sys_clock_nanosleep - .long sys_statfs64 - .long sys_fstatfs64 + .long sys_statfs64_wrapper + .long sys_fstatfs64_wrapper .long sys_tgkill .long sys_utimes /* 270 */ .long sys_arm_fadvise64_64 diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 34826bcceb7a..ee63ee78d84f 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -262,6 +262,16 @@ sys_sigaltstack_wrapper: ldr r2, [sp, #S_OFF + S_SP] b do_sigaltstack +sys_statfs64_wrapper: + teq r1, #88 + moveq r1, #84 + b sys_statfs64 + +sys_fstatfs64_wrapper: + teq r1, #88 + moveq r1, #84 + b sys_fstatfs64 + /* * Note: off_4k (r5) is always units of 4K. If we can't do the requested * offset, we return EINVAL. diff --git a/include/asm-arm/statfs.h b/include/asm-arm/statfs.h index e81f82783b87..a02e6a8c3d70 100644 --- a/include/asm-arm/statfs.h +++ b/include/asm-arm/statfs.h @@ -1,6 +1,42 @@ #ifndef _ASMARM_STATFS_H #define _ASMARM_STATFS_H -#include <asm-generic/statfs.h> +#ifndef __KERNEL_STRICT_NAMES +# include <linux/types.h> +typedef __kernel_fsid_t fsid_t; +#endif + +struct statfs { + __u32 f_type; + __u32 f_bsize; + __u32 f_blocks; + __u32 f_bfree; + __u32 f_bavail; + __u32 f_files; + __u32 f_ffree; + __kernel_fsid_t f_fsid; + __u32 f_namelen; + __u32 f_frsize; + __u32 f_spare[5]; +}; + +/* + * With EABI there is 4 bytes of padding added to this structure. + * Let's pack it so the padding goes away to simplify dual ABI support. + * Note that user space does NOT have to pack this structure. + */ +struct statfs64 { + __u32 f_type; + __u32 f_bsize; + __u64 f_blocks; + __u64 f_bfree; + __u64 f_bavail; + __u64 f_files; + __u64 f_ffree; + __kernel_fsid_t f_fsid; + __u32 f_namelen; + __u32 f_frsize; + __u32 f_spare[5]; +} __attribute__ ((packed,aligned(4))); #endif |
