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authorMarkus Gutschke <markus@google.com>2006-04-30 15:34:29 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-04-30 15:34:29 +0100
commitcd95842ca0ffb0e3df3b459832a60f9f4544ed9e (patch)
treeac05eb43e6e3449bcb6dd9357069f795e64d3e9f /include/asm-arm
parente0a515bc6a2188f02916e976f419a8640312e32a (diff)
downloadlinux-2.6.34-ux500-cd95842ca0ffb0e3df3b459832a60f9f4544ed9e.tar.gz
[ARM] 3486/1: Mark memory as clobbered by the ARM _syscallX() macros
Patch from Markus Gutschke In order to prevent gcc from making incorrect optimizations, all asm() statements that define system calls should report memory as clobbered. Recent versions of the headers for i386 have been changed accordingly, but the ARM headers are still defective. This patch fixes the bug tracked at http://bugzilla.kernel.org/show_bug.cgi?id=6205 Signed-off-by: Markus Gutschke <markus@google.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/unistd.h21
1 files changed, 14 insertions, 7 deletions
diff --git a/include/asm-arm/unistd.h b/include/asm-arm/unistd.h
index ee8dfea549b..26f2f4828e0 100644
--- a/include/asm-arm/unistd.h
+++ b/include/asm-arm/unistd.h
@@ -410,7 +410,8 @@ type name(void) { \
__asm__ __volatile__ ( \
__syscall(name) \
: "=r" (__res_r0) \
- : __SYS_REG_LIST() ); \
+ : __SYS_REG_LIST() \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -424,7 +425,8 @@ type name(type1 arg1) { \
__asm__ __volatile__ ( \
__syscall(name) \
: "=r" (__res_r0) \
- : __SYS_REG_LIST( "0" (__r0) ) ); \
+ : __SYS_REG_LIST( "0" (__r0) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -439,7 +441,8 @@ type name(type1 arg1,type2 arg2) { \
__asm__ __volatile__ ( \
__syscall(name) \
: "=r" (__res_r0) \
- : __SYS_REG_LIST( "0" (__r0), "r" (__r1) ) ); \
+ : __SYS_REG_LIST( "0" (__r0), "r" (__r1) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -456,7 +459,8 @@ type name(type1 arg1,type2 arg2,type3 arg3) { \
__asm__ __volatile__ ( \
__syscall(name) \
: "=r" (__res_r0) \
- : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2) ) ); \
+ : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -474,7 +478,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
__asm__ __volatile__ ( \
__syscall(name) \
: "=r" (__res_r0) \
- : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) ) ); \
+ : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -494,7 +499,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \
__syscall(name) \
: "=r" (__res_r0) \
: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), \
- "r" (__r3), "r" (__r4) ) ); \
+ "r" (__r3), "r" (__r4) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}
@@ -514,7 +520,8 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6
__syscall(name) \
: "=r" (__res_r0) \
: __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), \
- "r" (__r3), "r" (__r4), "r" (__r5) ) ); \
+ "r" (__r3), "r" (__r4), "r" (__r5) ) \
+ : "memory" ); \
__res = __res_r0; \
__syscall_return(type,__res); \
}