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36 .\" @(#)kvm_read.3 8.1 (Berkeley) 6/4/93
37 .\" $FreeBSD: src/lib/libkvm/kvm_read.3,v 1.6.2.3 2001/12/17 10:08:30 ru Exp $
38 .\" $DragonFly: src/lib/libkvm/kvm_read.3,v 1.4 2008/09/07 08:36:54 swildner Exp $
47 .Nd read or write kernel virtual memory
53 .Fn kvm_read "kvm_t *kd" "unsigned long addr" "void *buf" "size_t nbytes"
55 .Fn kvm_readstr "kvm_t *kd" "unsigned long addr" "char *buf" "size_t *len"
57 .Fn kvm_write "kvm_t *kd" "unsigned long addr" "const void *buf" "size_t nbytes"
64 functions are used to read and write kernel virtual memory (or a crash
69 for information regarding opening kernel virtual memory and crash dumps.
76 the kernel space address
86 Unlike their SunOS counterparts, these functions cannot be used to
87 read or write process address spaces.
91 function exists for convenience to read NUL terminated strings
92 from the kernel address space.
98 will allocate a sufficiently large buffer, which needs to be
107 will interpret the value it is pointing to as the size of
109 and will store the size of the complete string at
113 is too small to hold the complete string,
125 the number of bytes actually transferred is returned, if the request
127 Otherwise, -1 is returned.
132 is returned on failure.
133 Upon success, the address of the string is returned, which will be
135 if this was supplied.