From 713c481519f19df9e6d90f257e7da0336b057592 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Sat, 14 Jan 2006 16:35:03 +0000 Subject: [PATCH] [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 Signed-off-by: Russell King --- arch/arm/kernel/calls.S | 4 ++-- arch/arm/kernel/entry-common.S | 10 +++++++++ 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 +#ifndef __KERNEL_STRICT_NAMES +# include +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 -- 2.20.1