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x86 setup: fix constraints in segment accessor functions

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Fix the operand constraints for the segment accessor functions,
{rd,wr}{fs,gs}*.  In particular, the 8-bit functions used "r"
constraints instead of "q" constraints.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
H. Peter Anvin 2008-01-30 13:33:02 +01:00 committed by Ingo Molnar
parent 1cac5004e9
commit 811a0fff5d
1 changed files with 8 additions and 8 deletions
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16
arch/x86/boot/boot.h
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@ -109,7 +109,7 @@ typedef unsigned int addr_t;
static inline u8 rdfs8(addr_t addr)
{
u8 v;
asm volatile("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
return v;
}
static inline u16 rdfs16(addr_t addr)
@ -127,21 +127,21 @@ static inline u32 rdfs32(addr_t addr)
static inline void wrfs8(u8 v, addr_t addr)
{
asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "r" (v));
asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
}
static inline void wrfs16(u16 v, addr_t addr)
{
asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "r" (v));
asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
}
static inline void wrfs32(u32 v, addr_t addr)
{
asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "r" (v));
asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
}
static inline u8 rdgs8(addr_t addr)
{
u8 v;
asm volatile("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
return v;
}
static inline u16 rdgs16(addr_t addr)
@ -159,15 +159,15 @@ static inline u32 rdgs32(addr_t addr)
static inline void wrgs8(u8 v, addr_t addr)
{
asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "r" (v));
asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
}
static inline void wrgs16(u16 v, addr_t addr)
{
asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "r" (v));
asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
}
static inline void wrgs32(u32 v, addr_t addr)
{
asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "r" (v));
asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
}
/* Note: these only return true/false, not a signed return value! */