diff options
Diffstat (limited to 'share/man/man4/ksyms.4')
| -rw-r--r-- | share/man/man4/ksyms.4 | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/share/man/man4/ksyms.4 b/share/man/man4/ksyms.4 index aa7c7c42a4a..1e00129fbef 100644 --- a/share/man/man4/ksyms.4 +++ b/share/man/man4/ksyms.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: ksyms.4,v 1.5 2001/03/01 16:11:18 aaron Exp $ +.\" $OpenBSD: ksyms.4,v 1.6 2001/10/05 14:45:53 mpech Exp $ .\" .\" Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> .\" All rights reserved. @@ -39,11 +39,12 @@ The device masquerades as an .Em a.out executable with the symbols from the running kernel as its -symbol segment. Use of +symbol segment. +Use of .Nm /dev/ksyms requires that the boot loader preserve the kernel symbols and place -them at the end of the kernel's address space. Any port that is capable -of using the +them at the end of the kernel's address space. +Any port that is capable of using the .Em DDB debugger does this, even if .Em DDB @@ -52,9 +53,11 @@ is not configured into the kernel. The .Nm /dev/ksyms device is used to look up the symbol table name list from the running -kernel. Because it represents the running kernel it is guaranteed +kernel. +Because it represents the running kernel it is guaranteed to always be up to date even if the kernel file has been changed (or -is even non-existent). It is most useful when used in conjunction with +is even non-existent). +It is most useful when used in conjunction with .Xr nlist 3 or the .Xr kvm 3 @@ -96,7 +99,7 @@ It is not possible to .Xr mmap 2 .Nm /dev/ksyms because the boot loader does not load the symbol table onto a page -boundary (so it is not page aligned). If all the boot loaders were -fixed, +boundary (so it is not page aligned). +If all the boot loaders were fixed, .Xr mmap 2 support would be trivial. |