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Diffstat (limited to 'libbsd.txt')
| -rw-r--r-- | libbsd.txt | 39 |
1 files changed, 0 insertions, 39 deletions
@@ -112,45 +112,6 @@ The devices form a tree with the Nexus device at a high-level. This Nexus device is architecture specific in FreeBSD. In RTEMS we have our own Nexus device, see `rtemsbsd/bsp/bsp-bsd-nexus-devices.c`. -=== SYSCTL_NODE Example - -During development, we had an undefined reference to -_bsd_sysctl__net_children that we had trouble tracking down. Thanks to -Chris Johns, we located it. He explained how to read SYSCTL_NODE -definitions. This line from freebsd/netinet/in_proto.c is attempting -to add the "inet" node to the parent node "_net". - ----- -SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, - "Internet Family"); ----- - -Our problem was that we could not find where _bsd_sysctl__net_children -was defined. Chris suggested that when in doubt compile with -save-temps -and look at the preprocessed .i files. But he did not need that. He -explained that this the symbol name _bsd_sysctl__net_children was -automatically generated by a SYSCTL_NODE as follows: - -* _bsd_ - added by RTEMS modifications to SYSCTL_NODE macro -* sysctl_ - boilerplace added by SYSCTL_NODE macro -* "" - empty string for parent node -* net - name of SYSCTL_NODE -* children - added by SYSCTL macros - -This was all generated by a support macro declaring the node as this: - ----- -struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); ----- - -Given this information, we located this SYSCTL_NODE declaration in -kern/kern_mib.c - ----- -SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, - "High kernel, proc, limits &c"); ----- - === devfs (Device file system) === There is a minimal implementation based on IMFS. The mount point is fixed to |