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runtime: do not calculate asmstdcall address every time we make syscall

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Change-Id: If3c8c9035e12d41647ae4982883f6a979313ea9d
Reviewed-on: https://go-review.googlesource.com/8682
Reviewed-by: Minux Ma <minux@golang.org>
This commit is contained in:
Alex Brainman 2015-04-09 11:32:47 +10:00
parent eb44082915
commit 414444d416
3 changed files with 16 additions and 14 deletions
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10
src/runtime/os1_windows.go
View File

@ -94,6 +94,12 @@ var (
_GetQueuedCompletionStatusEx stdFunction
)
// Call a Windows function with stdcall conventions,
// and switch to os stack during the call.
func asmstdcall(fn unsafe.Pointer)
var asmstdcallAddr unsafe.Pointer
func loadOptionalSyscalls() {
var buf [50]byte // large enough for longest string
strtoptr := func(s string) uintptr {
@ -157,6 +163,8 @@ func getVersion() (major, minor byte) {
}
func osinit() {
asmstdcallAddr = unsafe.Pointer(funcPC(asmstdcall))
setBadSignalMsg()
loadOptionalSyscalls()
@ -391,7 +399,7 @@ func stdcall(fn stdFunction) uintptr {
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp(unsafe.Pointer(&fn))
}
asmcgocall(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&mp.libcall))
asmcgocall(asmstdcallAddr, unsafe.Pointer(&mp.libcall))
mp.libcallsp = 0
return mp.libcall.r1
}

6
src/runtime/os2_windows.go
View File

@ -4,12 +4,6 @@
package runtime
import "unsafe"
// Call a Windows function with stdcall conventions,
// and switch to os stack during the call.
func asmstdcall(fn unsafe.Pointer)
func getlasterror() uint32
func setlasterror(err uint32)

14
src/runtime/syscall_windows.go
View File

@ -95,7 +95,7 @@ func syscall_loadlibrary(filename *uint16) (handle, err uintptr) {
c.fn = getLoadLibrary()
c.n = 1
c.args = uintptr(unsafe.Pointer(&filename))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
handle = c.r1
if handle == 0 {
err = c.err
@ -110,7 +110,7 @@ func syscall_getprocaddress(handle uintptr, procname *byte) (outhandle, err uint
c.fn = getGetProcAddress()
c.n = 2
c.args = uintptr(unsafe.Pointer(&handle))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
outhandle = c.r1
if outhandle == 0 {
err = c.err
@ -125,7 +125,7 @@ func syscall_Syscall(fn, nargs, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
c.fn = fn
c.n = nargs
c.args = uintptr(unsafe.Pointer(&a1))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
return c.r1, c.r2, c.err
}
@ -136,7 +136,7 @@ func syscall_Syscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err ui
c.fn = fn
c.n = nargs
c.args = uintptr(unsafe.Pointer(&a1))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
return c.r1, c.r2, c.err
}
@ -147,7 +147,7 @@ func syscall_Syscall9(fn, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1
c.fn = fn
c.n = nargs
c.args = uintptr(unsafe.Pointer(&a1))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
return c.r1, c.r2, c.err
}
@ -158,7 +158,7 @@ func syscall_Syscall12(fn, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
c.fn = fn
c.n = nargs
c.args = uintptr(unsafe.Pointer(&a1))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
return c.r1, c.r2, c.err
}
@ -169,6 +169,6 @@ func syscall_Syscall15(fn, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
c.fn = fn
c.n = nargs
c.args = uintptr(unsafe.Pointer(&a1))
cgocall_errno(unsafe.Pointer(funcPC(asmstdcall)), unsafe.Pointer(&c))
cgocall_errno(asmstdcallAddr, unsafe.Pointer(&c))
return c.r1, c.r2, c.err
}