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KVM_READ(3) Library Functions Manual KVM_READ(3)

kvm_read, kvm_writeread or write kernel virtual memory

#include <kvm.h>

kvm_read(kvm_t *kd, u_long addr, void *buf, size_t nbytes);

kvm_write(kvm_t *kd, u_long addr, const void *buf, size_t nbytes);

The () and () functions are used to read and write kernel virtual memory (or a crash dump file). See kvm_open(3) for information regarding opening kernel virtual memory and crash dumps.

The () function transfers nbytes bytes of data from the kernel space address addr to buf. Conversely, () transfers data from buf to addr. Unlike their SunOS counterparts, these functions cannot be used to read or write process address spaces.

Upon successful completion, the number of bytes actually transferred is returned. Otherwise, -1 is returned.

kvm(3), kvm_geterr(3), kvm_getprocs(3), kvm_nlist(3), kvm_open(3)

June 5, 2013 OpenBSD-6.3