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KVM_READ(3) NetBSD Library Functions Manual KVM_READ(3)
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kvm_read, kvm_write -- read or write kernel virtual memory
Kernel Data Access Library (libkvm, -lkvm)
kvm_read(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes);
kvm_write(kvm_t *kd, unsigned long addr, const void *buf, size_t nbytes);
The kvm_read() and kvm_write() functions are used to read and write ker-
nel 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.
Upon success, the number of bytes actually transferred is returned. Oth-
erwise, -1 is returned.
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 9.99 June 4, 1993 NetBSD 9.99