NAME
dbsym —
copy kernel symbol table into db_symtab
space
SYNOPSIS
dbsym |
[-Ppv] [-b
bfdname] kernel |
DESCRIPTION
dbsym is used to copy the symbol table in a newly linked
kernel into the db_symtab array (in the data section) so
that the ddb(4) kernel debugger can find the symbols. This program is only used
on systems for which the boot program does not load the symbol table into
memory with the kernel. The space for these symbols is reserved in the data
segment using a config option like:
options SYMTAB_SPACE=72000To recognize kernel executable format, the
-b flag specifies BFD name of kernel.
If the -P flag is given,
dbsym will report the size of the kernel symbol
table.
If the -p flag is given,
dbsym will report the size of the kernel symbol
table and the size of the db_symtab space. Two values are printed out in a
line separated by a space.
If the -v flag is given,
dbsym will print out status information as it is
copying the symbol table.
Note that debugging symbols are not useful to the
ddb(4) kernel debugger, so to minimize the size of the kernel, one
should either compile the kernel without debugging symbols (no
-g flag) or use the
strip(1) command to strip debugging symbols from the kernel before
dbsym is used to copy the symbol table. The
command
strip -d netbsd