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Fixed some style bugs (mainly unused includes).
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X_db_search_symbol(). Otherwise we don't see important symbols in
non-verbosely written assembler code.
NetBSD already has this. The kld version already has a stronger form
of it without really trying -- linker_ddb_search_symbol() doesn't
support ddb's symbol search strategy parameter, so the kld
X_db_search_symbol() doesn't pass the parameter to linker_ddb...() and
linker_ddb...() doesn't make distinctions based on the symbol type.
db_elf.c now works better than db_kld.c when it works (which is essentially
when there are no modules except the kernel). It works after booting
with -d. db_kld.c doesn't work until lots of SYSINIT()s have run.
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symbol table sections. Reconstruct the necessary section headers from
(ksym_start, ksym_end). This was much easier than converting to use
module metadata, and just works for static symbols, unlike db_kld when
there is no module metadata. Initialize (ksym_start, ksym_end) from
bootinfo on i386's only.
The boot loader should load section headers for all sections that it
loads, and apparently did this for at least the symbol table sections
when this file last worked under FreeBSD (on alphas only) and always
did this under NetBSD (where this file was obtained from). At least
on i386's, boot2 discards the section headers (except for converting
them to (bootinfo.bi_symtab, bootinfo.bi_esymtab), and as far as I can
tell, loader(8) discards them apart from converting them to the bootinfo
values and module metadata.
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and renaming ALIGNED_POINTER() to _ALIGNED_POINTER() plus the following
hacks for i386's:
- define _ALIGNED_POINTER() if it is not already defined. Most non-i386
arches define it <machine/param.h> define it in <machine/param.h>,
although none actually used it in the kernel.
- define ksym_start and ksym_end. Most non-i386 arches still define and
initialize these in machdep.c although they didn't used them. Here is
a better place to define them but not to initialize them.
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doesn't actually build yet.
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the longstanding brokenness of symbols in ddb at boot time. It doesn't
compile and is not attached to the build yet.
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kernel compile.
This commit includes significant work to proper handle const arguments
for the DDB symbol routines.
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in db_lookup() to avoid the *cp = 0 / *cp = ':' combo ( temporary
nul-terminate-then-restore-original ) on a const char * string.
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because the alpha boot loader hasn't been converted yet, and because
it needs the full symbol tables with local symbols in order to make sense
of stack tracebacks. KLD will implement this (using full sybmol table
rather than the globals only) shortly.
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Obtained from: NetBSD
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symbols so its not too useful. Changes to the kernel linker to allow it to
supply DDB with symbols will come later.
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