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x/sys: add unsafe mmap, munmap, mremap

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Fixes golang/go#56123
This commit is contained in:
Nuno Cruces
2024-06-13 14:44:51 +01:00
parent 348425aa18
commit be024e2a16
2 changed files with 14 additions and 0 deletions
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5
unix/mremap.go
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@@ -50,3 +50,8 @@ func (m *mremapMmapper) Mremap(oldData []byte, newLength int, flags int) (data [
func Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) {
return mapper.Mremap(oldData, newLength, flags)
}
func MremapPtr(oldAddr unsafe.Pointer, oldSize uintptr, newAddr unsafe.Pointer, newSize uintptr, flags int) (ret unsafe.Pointer, err error) {
xaddr, err := mapper.mremap(uintptr(oldAddr), oldSize, newSize, flags, uintptr(newAddr))
return unsafe.Pointer(xaddr), err
}

9
unix/syscall_unix.go
View File

@@ -154,6 +154,15 @@ func Munmap(b []byte) (err error) {
return mapper.Munmap(b)
}
func MmapPtr(addr unsafe.Pointer, length uintptr, prot int, flags int, fd int, offset int64) (ret unsafe.Pointer, err error) {
xaddr, err := mapper.mmap(uintptr(addr), length, prot, flags, fd, offset)
return unsafe.Pointer(xaddr), err
}
func MunmapPtr(addr unsafe.Pointer, length uintptr) (err error) {
return mapper.munmap(uintptr(addr), length)
}
func Read(fd int, p []byte) (n int, err error) {
n, err = read(fd, p)
if raceenabled {