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Rearrange for better page breaking

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This commit is contained in:
Austin Clements 2010-08-31 16:42:05 -04:00
parent 7472b2b451
commit 37ee75f42e
1 changed files with 43 additions and 42 deletions
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85
x86.h
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@ -90,25 +90,36 @@ readeflags(void)
return eflags;
}
static inline uint
xchg(volatile uint *addr, uint newval)
{
uint result;
// The + in "+m" denotes a read-modify-write operand.
asm volatile("lock; xchgl %0, %1" :
"+m" (*addr), "=a" (result) :
"1" (newval) :
"cc");
return result;
}
static inline void
loadgs(ushort v)
{
asm volatile("movw %0, %%gs" : : "r" (v));
}
static inline void lebp(uint val)
{
asm volatile("movl %0,%%ebp" : : "r" (val));
}
static inline uint rebp(void)
{
uint val;
asm volatile("movl %%ebp,%0" : "=r" (val));
return val;
}
static inline void lesp(uint val)
{
asm volatile("movl %0,%%esp" : : "r" (val));
}
static inline uint resp(void)
{
uint val;
asm volatile("movl %%esp,%0" : "=r" (val));
return val;
}
static inline void
cli(void)
{
@ -121,6 +132,25 @@ sti(void)
asm volatile("sti");
}
static inline void nop_pause(void)
{
asm volatile("pause" : :);
}
//PAGEBREAK!
static inline uint
xchg(volatile uint *addr, uint newval)
{
uint result;
// The + in "+m" denotes a read-modify-write operand.
asm volatile("lock; xchgl %0, %1" :
"+m" (*addr), "=a" (result) :
"1" (newval) :
"cc");
return result;
}
static inline void lcr0(uint val)
{
asm volatile("movl %0,%%cr0" : : "r" (val));
@ -152,35 +182,6 @@ static inline uint rcr3(void)
return val;
}
static inline void lebp(uint val)
{
asm volatile("movl %0,%%ebp" : : "r" (val));
}
static inline uint rebp(void)
{
uint val;
asm volatile("movl %%ebp,%0" : "=r" (val));
return val;
}
static inline void lesp(uint val)
{
asm volatile("movl %0,%%esp" : : "r" (val));
}
static inline uint resp(void)
{
uint val;
asm volatile("movl %%esp,%0" : "=r" (val));
return val;
}
static inline void nop_pause(void)
{
asm volatile("pause" : :);
}
//PAGEBREAK: 36
// Layout of the trap frame built on the stack by the
// hardware and by trapasm.S, and passed to trap().