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KVM_READ(3) Library Functions Manual KVM_READ(3) NAME kvm_read, kvm_write - read or write kernel virtual memory LIBRARY Kernel Data Access Library (libkvm, -lkvm) SYNOPSIS #include <kvm.h> ssize_t kvm_read(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes); ssize_t kvm_write(kvm_t *kd, unsigned long addr, const void *buf, size_t nbytes); DESCRIPTION The kvm_read() and kvm_write() functions are used to read and write kernel virtual memory (or a crash dump file). See kvm_open(3) or kvm_openfiles(3) for information regarding opening kernel virtual memory and crash dumps. The kvm_read() function transfers nbytes bytes of data from the kernel space address addr to buf. Conversely, kvm_write() transfers data from buf to addr. Unlike their SunOS counterparts, these functions cannot be used to read or write process address spaces. RETURN VALUES Upon success, the number of bytes actually transferred is returned. Otherwise, -1 is returned. SEE ALSO kvm(3), kvm_close(3), kvm_getargv(3), kvm_getenvv(3), kvm_geterr(3), kvm_getprocs(3), kvm_nlist(3), kvm_open(3), kvm_openfiles(3) NetBSD 8.0 June 4, 1993 NetBSD 8.0