segbrk – change memory allocation|
Segbrk sets the system's idea of the lowest unused location of
a segment to addr rounded up to the next multiple of a page size,
typically 4096 bytes. The segment is identified by saddr which
may be any valid address within the segment.
brk(2), segattach(2), segflush(2)|
Sets errstr. Segbrk returns (void*)–1 on error.|
|Segbrk is not fully defined or implemented. In particular, it cannot always return the top of bss when called with a zero addr argument. The segbrk system call may go away or be re–implemented to give more general segment control, subsuming the functions of brk(2), segflush(2) and segfree in segattach(2).|