[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>
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 34826bc..ee63ee7 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -262,6 +262,16 @@
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.