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MFi386 (1.103 and 1.104: fixed some problems in high resolution profiling

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and improved some comments).  Also, made the documented {f,s}uword()
functions the standard entry points and the undocumented {f,s}uword64()
functions alternative entry points, like {f,s}uword32() for i386's.  The
bitrot in the comments was a little larger here -- there are new undocumented
32-bit sub-word functions, not just renaming of 16-bit functions from
documented ones to undocumented ones.
This commit is contained in:
Bruce Evans 2004-05-21 16:50:57 +00:00
parent 912f07a626
commit 69820c2a56
1 changed files with 15 additions and 31 deletions
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46
sys/amd64/amd64/support.S
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@ -352,12 +352,13 @@ ENTRY(casuptr)
ret
/*
* fu{byte,sword,word} - MP SAFE
*
* Fetch a byte (sword, word) from user memory
* %rdi
* Fetch (load) a 64-bit word, a 32-bit word, a 16-bit word, or an 8-bit
* byte from user memory. All these functions are MPSAFE.
* addr = %rdi
*/
ENTRY(fuword64)
ALTENTRY(fuword64)
ENTRY(fuword)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -369,9 +370,6 @@ ENTRY(fuword64)
movq $0,PCB_ONFAULT(%rcx)
ret
ENTRY(fuword)
jmp fuword64
ENTRY(fuword32)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -385,9 +383,10 @@ ENTRY(fuword32)
ret
/*
* These two routines are called from the profiling code, potentially
* at interrupt time. If they fail, that's okay, good things will
* happen later. Fail all the time for now - until the trap code is
* fuswintr() and suswintr() are specialized variants of fuword16() and
* suword16(), respectively. They are called from the profiling code,
* potentially at interrupt time. If they fail, that's okay; good things
* will happen later. They always fail for now, until the trap code is
* able to deal with this.
*/
ALTENTRY(suswintr)
@ -395,9 +394,6 @@ ENTRY(fuswintr)
movq $-1,%rax
ret
/*
* fuword16 - MP SAFE
*/
ENTRY(fuword16)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -410,9 +406,6 @@ ENTRY(fuword16)
movq $0,PCB_ONFAULT(%rcx)
ret
/*
* fubyte - MP SAFE
*/
ENTRY(fubyte)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -434,12 +427,12 @@ fusufault:
ret
/*
* su{byte,sword,word} - MP SAFE
*
* Write a byte (word, longword) to user memory
* addr = %rdi, value = %rsi
* Store a 64-bit word, a 32-bit word, a 16-bit word, or an 8-bit byte to
* user memory. All these functions are MPSAFE.
* addr = %rdi, value = %rsi
*/
ENTRY(suword64)
ALTENTRY(suword64)
ENTRY(suword)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -453,9 +446,6 @@ ENTRY(suword64)
movq %rax,PCB_ONFAULT(%rcx)
ret
ENTRY(suword)
jmp suword64
ENTRY(suword32)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -470,9 +460,6 @@ ENTRY(suword32)
movq %rax,PCB_ONFAULT(%rcx)
ret
/*
* suword16 - MP SAFE
*/
ENTRY(suword16)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)
@ -487,9 +474,6 @@ ENTRY(suword16)
movq %rax,PCB_ONFAULT(%rcx)
ret
/*
* subyte - MP SAFE
*/
ENTRY(subyte)
movq PCPU(CURPCB),%rcx
movq $fusufault,PCB_ONFAULT(%rcx)