This module will, in the not-so-distant future, grow functionality for
reducing boilerplate in functions that implement cli commands. It will
likely also house most in-tree cli commands.
This seems to have been arbitrary; bootlock_password and password don't seem
to have any documented length restrictions, and loader(8) probably shouldn't
care about whatever GELI passphrase length restrictions might exist.
Reported by: Kalle Carlbark <kalle.carlbark+freebsd@kcbark.net>
As noted in D14267 load_elf.c has a variety of indentation styles. Move
to standard 8 column hard tab indents, 4 space second level indents.
Also includes some whitespace cleanups found by clang-format.
Curiously, changing whitespace seems to cause the md5 of the .o files to differ
these days hence the following testing strategy:
Tested by: objdump -d | md5 (both in-tree clang and lang/gcc6)
Attempt to autoboot when we open the default menu, and only when we open the
default menu. This alleviates the need for checking menu.already_autoboot,
because we're not trying to autoboot every time we open a submenu.
I note that escaping to loader prompt and going back to the menu (by running
require('menu').run() at the loader prompt) will happily work and not
re-initiate the autoboot sequence since "Escape to loader prompt" disables
the autoboot_delay.
Instead of based it off of whether 'kernels' was specified, base it off of a
new variable: kernels_autodetect. If set to yes, we'll run the autodetection
bits and add any detected kernels to the already existing list *after* both
'kernel' and 'kernels'.
This looks a little bit differently than the forth version for the time
being, just to get off the ground- rather than a paging system, it's
implemented as a simple carousel like the kernel selector.
Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D14436
For the benefit of lualoader, add all bootenvs to environment when
init_zfs_bootenv is invoked. All of the boot environment logic can then be
implemented in pure lua, rather than going back and forth with C to
implement paging.
This stores all boot environments in bootenvs[idx] and the final count of
bootenvs in bootenvs_count.
While here, make a copy of currdev for init_zfs_bootenv since it will be
modifying it and the caller may not necessarily want that. Some of the logic
was shifted around so that the 'currdev' pointer remains at the beginning of
the string and 'beroot' is moved around as needed to modify it or ultimately
store it in zfs_be_root.
The original zfs_bootenv that this was copied from will be able to go away
only if/when forth eventually goes away.
Tested with: lualoader (and local changes to add boot env. support)
Tested with: forth
Reviewed by: cem (earlier version), imp
Differential Revision: https://reviews.freebsd.org/D14435
The Makefile gives the impression that ext2fs and msdos were excluded
(they weren't) and that you could exclude cd9660 and ufs support (you
couldn't). Allow those to be excluded.
We need to look, in the future, at trimming the number of supported
filesystems, and this will make that easier.
There's no reason to have multiple copies of lszfs and
reloadbe. Consolidate them into one location. Also ldi_get_size is the
same everywhere (except sparc64). Make it the same everywhere as the
common definition is more general and will work on spar64.
This matches forth behavior. Hitting "6" when autobooting at the welcome
menu will now take you directly to the "Boot Options" menu.
We likely have some slight optimizations we should make, like not checking
autoboot every time we open a new menu and things of this nature. Further
work will go towards this end.
Allow "name" entries to be simple strings, instead of just functions. We
know whether we support colors or not by the time any of this is setup, so
all menu names that are basically static with colors sprinkled in are good
candidates for simplification.
Also simplify "func" in many cases where it's just invoking another function
with no arguments. The downside to this simplification is that the functions
called can no longer be trivially replaced by a local module. The upside is
that it removes another layer of indirection that we likely don't need.
These can be re-evaluated later if a compelling argument is raised, on a
case-by-case basis, for replacement.
The intent here is to abstract away the name of the default menu. The
default menu is still the welcome menu, but this detail doesn't need to
matter to things outside of the menu module. You may change the default
menu, but one would need to modify a specific menu.
Provide a way for out-of-tree users of lualoader to patch into the loader
system without having to modify our distributed scripts.
Do note that we can't really offer any API compatibility guarantees at this
time due to the evolving nature of lualoader right now.
This still has some utility as local modules may add commands at the loader
prompt without relying heavily on lualoader features- this specific
functionality is less likely to change without more careful consideration.
Reviewed by: cem (earlier version)
Differential Revision: https://reviews.freebsd.org/D14439
I can't find any good reason these aren't enabled, so enable them.
The silent runs will only return false on actual parse errors, so it's ok to
be loud about those failures.
This was also a convenience convention (for me) that is not very lua-tic.
Drop it.
I've maintained some parentheses where I'd prefer them, for example,
'if x or y or (z and w) then', but these situations are far and few between.
This was previously chosen out of convenience, as we had a mixed style and
needed to be consistent. I started learning Lua on Friday, so I switched
everything over. It is not a very lua-nic convention, though, so drop it.
Excessive parenthesizing around conditionals is next on the chopping block.
Track the latest value we've set an environment variable to, and only
restore those that are unchanged from that.
This gives us some leeway to make sure we're not clobbering variables
overwritten by menu changes.
This should be functional and roughly equivalent to the Forth version.
Stop doing a loadelf() on menu exit now that we can DTRT with boot
invocations. autoboot interception will follow not long after.
core.boot and core.autoboot may both take arguments; add a helper to cleanly
append an argstring to the given loader command.
Also provide a popFrontTable() that we'll use pop the command name off of an
argv table. We don't have the table library included, and including it is
non-trivial, so we'll implement this one function that we need in lua for
the time being.
If the user's selected a kernel, we really should be trying to load that one
instead of falling back to some default kernel.
This should generally be a no-op and most desirable, unless you really
enjoyed surprises.
Provisioned from MACHINE/MACHINE_ARCH on the system, expose loader.machine
and loader.machine_arch respectively.
These may be used to hide ACPI option on non-applicable archs.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D14446
In the remaining error case, return a 3-tuple consistent with the other
error return case.
Document how to invoke lfs.attributes() and detect/decode error return in
example comments.
Reviewed by: kevans
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14451
Carousel storage doesn't need to happen in the menu module, and indeed
storing it there introduces a circular reference between drawer and menu
that only works because of global pollution in loader.lua.
Carousel choices generally map to config entries anyways, making it as good
of place as any to store these. Move {get,set}CarouselIndex functionality
out into config so that drawer and menu may both use it. If we had more
carousel functionality, it might make sense to create a carousel module, but
this is not the case.
If we failed to execute the input line as pure lua, run the command through
parse for consistent argument parsing. Pass the parsed arguments through to
a global "cli_execute" written in Lua, which is expected to either handle it
or pass it back through to interp_builtin_cmd (via loader.command).
lua-handled cli commands will then exist as globals in whatever module they
most belong in, and invocations at the loader prompt will magically dispatch
to them if they exist.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D14450
We follow pretty closely the following structure of a module:
1. Copyright notice
2. Module requires
3. Module local declarations
4. Module local definitions
5. Module exports
6. return
Re-organize the one-offs (config/drawer) and denote the start of module
exports with a comment.
Declare these adjacent to the local definitions at the top of the module,
and make sure they're actually declared local to pollute global namespace a
little bit less.
This refactor makes it straightforward to add new logos for drawing and
organizes logo definitions in a logical manner.
The graphic to be drawn for each logo may again be modified outside of
drawer, but it must be done on a case-by-case basis as a modification to the
loader_logo.
As part of an effort to slowly reduce our exports overall to a set of stable
properties/functions, go ahead and reduce what drawer exposes to others.
The graphics should generally not be modified on their own, but their
position could be modified if additional grahics also need to be drawn.
Export position/shift information, but leave the actual graphic local to
the module.
The next step will be to create a 'menudef' that gets exported instead, with
each entry in the menudef table describing the graphic to be drawn along
with specific positioning information.
Pull out specialized naming behavior into drawer.menu_name_handlers. This is
currently only needed for the carousel entry, where naming is based on the
current choice and the menu item purposefully does not store this state.
The setup was designed so that every type can have a special name handler,
and the default action is to simply use the result of entry.name().
This is a bit cleaner than our former method of an if ... else chain of
handlers. Store handlers in the menu.handlers table so that they may be
added to or removed dynamically.
All handlers take the current menu and selected entry as parameters, and
their return value indicates whether the menu processor should continue or
not. An omitted return value or 'true' will indicate that we should
continue, while returning 'false' will indicate that we should exit the
current menu.
The omitted return value behavior is due to continuing the loop being the
more common situation.
Building the swapped welcome menu (first two items swapped) is kind of a
sluggish, because it requires a full (recrusive) shallow copy of the welcome
menu. Cache the result of that and re-use it later, instead of building it
everytime.
While here, don't create temporary locals just for swapping. The following
is just as good:
x, y = y, x;
Reported by: Alexander Nasonov <alnsn@yandex.ru> (swapping)
[Enter] should be moved to the single user menu item when we swap them.
Define a non-standard menu entry function "alternate_name" to use for this
purpose for ultimate flexibility if we change our minds later. When we're
booting single user, make a shallow copy of the menu that we'd normally
display and swap the items and their name functions to use alternate_name
instead. Toggling single user in the options menu and going back to the main
menu will now correctly reflect the current boot setting with the first two
menu options and "[Enter]" will always be on the right one.
This shallow copy technique has the chance of being quite slow since it's
done on every redraw, but in my testing it does not seem to make any obvious
difference.
shallowCopyTable could likely belong better in a general-purpose utility
module, but this (and the key constnats) are the only candidates we have at
the moment so we'll drop it into our core stuff for the moment and consider
re-organization at a later date.
lualoader does a pretty good job of reverting any environment changes now.
It will even wipe out boot_verbose if it's set explicitly in loader.conf(5)
and overwritten in the boot options menu.
Future work will likely change this, as explicit choices made in the menu
should probably override the new loader.conf(5). I don't suspect this will
cause much grief, though, so it is not a high priority until boot
environment support actually lands.
This will be used when boot environment support lands to make a good-faith
effort to apply any new loader.conf(5) environment settings atop the default
configuration that we started with.
If we've fetched menu.entries and it turns out it's a function, call it to
get the actual menu entries.
This will be used to swap multi-/single- user boot options if we're booting
single user by default (boot_single="YES" in loader.conf(5)). It can also be
used fairly easily for other non-standard situations.
Instead of directly listing them in menu.welcome and menu.boot_options,
store them at menu.welcome.entries and welcome.boot_options.entries.
This will come into play later when we need to re-order the welcome menu if
boot_single is specified.
Menus are actually defined as entries in the 'menu' table. These local
declarations have not been used in the history of our in-tree lua scripts,
so give them the boot.
Loading the kernel and modules can be really slow. Loading before the menu
draws and every time one changes kernel/boot environment is even more
painful.
Defer loading until we either boot, auto-boot, or escape to loader prompt.
We still need to deal with configuration changes as the boot environment
changes, but this is generally much quicker.
This commit strips all ELF loading out of config.load/config.reload so that
these are purely for configuration. config.loadelf has been created to deal
with kernel/module loads. Unloading logic has been ripped out, as we won't
need to deal with it in the menu anymore.
Discussed in part with: allanjude
r329550 introduced config.kernel_loaded. config.load() doesn't provide a
means of overriding the kernel to load, but that likely isn't necessary as
it will not be a common case. When loading the kernel, just attempt to load
the kernel previously loaded and specified in config.kernel_loaded.
If we haven't loaded a kernel yet, config.kernel_loaded will be unset/nil
and the "default"/first kernel found will be loaded. If we've loaded a
kernel, we'll try to load that same kernel again and fallback to the default
kernel if we need to.
This in also in support of upcoming boot environment support.
'nil' means the 'first kernel found in module_path', which is the same
interpretation as passing 'nil' to loadkernel.
Otherwise, it denotes the name of a kernel that we've successfully loaded.
When reloaded later, we will still need to do the full search again to
locate the actual kernel in case things have changed, so just the name is
good enough.
This is in support of upcoming boot environment support. vfs.root.mountfrom
and currdev will be changed, then we will reload configuration and attempt
to reload the currently chosen kernel unless we shouldn't.
In the worst case scenario, we have no passwords to prompt for and we end up
just clearing the screen twice before we draw the menu or proceed with boot.
In the best case scenario, we don't try drawing password prompts amidst a
bunch of kernel/module loading.
This solve problem when booting with efi on armv7
Reviewed by: imp, tsoome
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D14415
Some other points I think we need to be consistent on:
- Spacing around string concatenation (always)
- Test against 'nil' explicitly rather than relying on 'not' for things that
reasonably won't be returning a boolean. e.g. loader.getenv
Eventually this will all get formalized somewhere.
Once we've successfully loaded a kernel, we add its directory to
module_path. If we switch kernels with the kernel selector, we again prepend
the kernel directory to the current module_path and end up with multiple
kernel paths, potentially with mismatched kernel/modules, added to
module_path.
Fix it by caching module_path at load() time and using the cached version
whenever we load a new kernel.
In a similar fashion to FILE, provide thin shims for the standard directory
manipulation functions.
Reviewed by: imp
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14417
These are the style points that I'd like to try and maintain in our lua
scripts:
- Parentheses around conditionals
- Trailing semicolons, except on block terminators
- s:method(...) instead of string.method(s, ...) where applicable
There's likely more, but that'll get hammered out as we continue.
Prompt for GELI passphrase when geom_eli_passphrase_prompt has been set to
"YES" in loader.conf(5).
This entailed breaking out the password prompt into its own function that
can be reused between the password compare bits and this prompt that simply
takes the entered password and passes it along in the environment as
kern.geom.eli.passphrase.
I've also added a TODO to re-evaluate later if we want the "password
masking" -- it is currently not functional, so one still can't observe the
length of the password typed at the prompt.
This is the procedure that config.loadkernel tries to go through, but
reloading kernel config didn't use this function. Amend config.loadkernel to
take an optional other_kernel.
While here, be a little more verbose ("Trying to load kernel") so that it's
easy to follow where we've gone wrong.
1.) Instead of string.function(s, ...), use s:function(...)
2.) Don't try to concatenate `res`, it was just tested to be nil
3.) Note that "Loading configuration" is configured modules, and be a little
more precise in mentioning what failed ("loading of one or more modules")
An empty module_path to start with isn't ideal, but if all modules are
contained within a kernel directory (which is what we just tested) then it
isn't strictly an error. Don't assume that module_path has a value already.
When we fail to load the kernel, printing the result (which is guaranteed to
be nil) is not intended; print the name of the kernel.
autoboot_delay=NO is documented to wait for input and *not* autoboot, which
is the exact opposite of the current behavior.
Additionally, autoboot_delay=-1 is documented to disallow the user from
interrupting the boot (i.e. autoboot immediately), which was not previously
honored.
This also fixes the case insensitive comparison to be truly case
insensitive. This is kind of nit-picky, but the previous version would only
accept "no" and "NO".
Don't move this into config.reload because we may want to force reloads if
/boot changes out from under us later.
As a caution: changing kernels in lualoader at the moment might not be
loading all of your modules (in my testing, at least) from loader.conf(5).
This is a known problem.
Decimals screw up the escape sequence and the cursor will not get set. Right
now this only affects setting the cursor for drawing "Welcome to FreeBSD" --
the resulting number after our (x+(w/2)-9) calculation gets output as
"14.0."
This should be fixed at the interpreter level, rather than here, but this is
not a widespread problem at the moment so we'll fix it up in further work.
Reported by: David Wolfskill <david@catwhisker.org>
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D14375
ffs_sbget() may return a superblock buffer even if it fails, so the
caller must be prepared to free it in this case. Moreover, when tasting
alternate superblock locations in a loop, ffs_sbget()'s readfunc
callback must free the previously allocated buffer.
Reported and tested by: pho
Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D14390
This is a pre-cursor to boot environment support in lualoader. Create a new
menu item type, "carousel_entry", that generally provides a callback to get
the list of items, a carousel_id for storing the current value, and the
standard name/func functions that an entry has.
The difference between this and a normal menu item, functionally, is that
selecting a carousel item will automatically rotate through available items
and wrap back at the beginning when the list is exhausted.
The 'name' function takes the choice index, current choice, and the list of
choices as parameters so that the menu item can decorate the name freely as
desired.
The 'func' function takes the current choice as a parameter, so it can act
accordingly.
The kernel menu item has been rewritten to use the carousel_entry type as
both an example and initial test of its functionality before it is used for
boot environment options.
Noting that we're in lualoader is nice, but it's not a difference we raelly
need to expose to Fred. Re-word it to match the 4th wording and reduce
differences.
This removes a redundant alias that has since been converted into a global
alias. It was converted to a global alias before to ensure that we always
have a way to go up one level in the menu.
Set it based on hint.acpi.0.rsdp. Initially, hint.acpi.0.disabled will be
respected. "Using System Defaults" will override whether it's explicitly
disabled by hint and re-load it based on whether it's present on the system.
Unlike the 4th version, this is not restricted to x86. I have no strong
reasoning for this, so this is definitely open to change.
This submenu is likely going to go away in favor of kernel selection as it
is done in forth at the moment, but for the time being don't descend into it
if we have no kernels available for listing.
OK. We don't really need a bsd.stand.mk, and it was causing a -fPIC
for the toolchain to be added (bogusly) when building on amd64. Pull
all relevant defs back into defs.mk and delete bsd.stand.mk.
This saves about 15-20k on i386 loader and zfsloader which when
combined with Lua give us a lot more stack space in those constrained
environments.
bootp/arp/rarp/rpc all use the sendrecv implementation in net.c. tftp has
its own implementation because it passes an extra parameter into the recv
callback for the received payload type to be held.
These sendrecv implementations are otherwise equivalent, so consolidate
them. The other users of sendrecv won't be using the extra argument to recv,
but this gives us only one place to worry about respecting timeouts and one
consistent timeout behavior.
Tested by: sbruno
Reviewed by: sbruno, tsoome
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14373
metadata load files were consolidated in r329190, and these relocation fixup
bits were inadvertently dropped in the process. Re-add them to fix boot with
ubldr.
Glanced over by: jhibbits
X-MFC-With: r329190
Scan only the BLOCK IO MEDIA once instead of each time for each type of
device (fd, cd and hdd).
Leave the mechanism to free and reprobe all devices if one day we want
to implement a "dev rescan" thing.
Reviewed by: imp, tsoome
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D14334
readip() doesn't, at the moment, properly indicate to callers that it has
timed out. One can tell that it's timed out if errno == EAGAIN when it
returns, but this is not ideal. Restructure it a little bit to explicitly
set errno to ETIMEDOUT if we've exhausted tleft.
I found two places that care about where it timed out or not: sendrecv in
net.c and sendrecv_tftp. Both are structured to pass smaller timeout values
to readip while tracking a larger timeout. Neither of them were able to do
this properly with readip not indicating ETIMEDOUT, so fix it.
While here, straighten out the time (t/t1) usage in sendrecv_tftp.
This would have manifested itself in periodic failures to NFS/TFTP boot for
no apparent reason because MINTMO/MAXTMO were not actually being respected
properly. Problems were not reported with NFS, only TFTP.
Reported by: sbruno
Reviewed by: sbruno, tsoome
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D14350
Summary:
All metadata.c files are very similar, with only trivial changes. Unify them
into a single common file, with minor special-casing where needed.
Reviewed By: imp
Differential Revision: https://reviews.freebsd.org/D13978
These are the .lua files from from Pedro Souza's 2014 Summer of Code
project. Rui Paulo, Pedro Arthur and Wojciech A. Koszek also
contributed.
Obtained from: https://wiki.freebsd.org/SummerOfCode2014/LuaLoader
Sponsored by: Google Summer of Code
Improve the SoC lua menu code to bring it in line with forth
menu functionality
Submitted by: Zakary Nafziger
Sponsored by: FreeBSD Foundation
Use loader.setenv and loader.unsetenv instead of loader.perform
Convert from include("/boot/foo.lua") to foo = require("foo");
to bring in line with latest lua module conventions.
Enforce a uniform style for the new .lua files:
o hard tab indenation for 8 spaces
o don't have if foo then bar; else bas; end on one line
MFC After: 1 month
Relnotes: yes
Differential Review: https://reviews.freebsd.org/D14295
liblua glues the lua run time into the boot loader. It implements all
the runtime routines that lua expects. In addition, it has a few
standard 'C' headers that nueter various aspects of the LUA build that
are too specific to lua to be in libsa. Many refinements from the
original code to improve implementation and the number of included lua
libraries. Use int64_t for lua_Number. Have "/boot/lua" be the default
module path. Numerous cleanups from the original GSoC project,
including hacking libsa to allow lua to be built with only one change
outside luaconf.h.
Add the final bit of lua glue to bring in liblua and plug into the
multiple interpreter framework, previously committed.
Add LOADER_LUA option, currently off by default.
Presently, this is an experimental option. One must opt-in to using
this by defining WITH_LOADER_LUA and WITHOUT_FORTH. It's been
lightly tested, so keep a backup copy of your old loader handy.
The menu code, coming in the next commit, hasn't been exhaustively
tested. A LUA boot loader is 60k larger than a FORTH one, which is
80k larger than a no-interpreter one. Subtle changes in size
may tip things past some subtle limit (the binary is ~430k now
when built with LUA). A future version may offer coexistance.
Bump FreeBSD version to 1200058 to mark the milestone.
Pedro Souza's 2014 Summer of Code project. Rui Paulo, Pedro Arthur,
Zakary Nafziger and Wojciech A. Koszek also contributed. Warner Losh
reworked it extensively into its current form.
Obtained from: https://wiki.freebsd.org/SummerOfCode2014/LuaLoader
Sponsored by: Google Summer of Code
Relnotes: Yes
MFC After: 1 month
Differential Review: https://reviews.freebsd.org/D14295
r328536 broke symbol loading on amd64 at least (and probably other
arches). r328826 contained the problem to ppc only by adding
pre-processors guards.
Fix this properly by moving the endianness conversion to separate
helper functions, and make the conversion more robust by using sizeof
instead of having to manually code the size of each field.
Finally list the fields in each structure in a macro in order to avoid
code repetition.
Sponsored by: Citrix Systems R&D
Reviewed by: kib emaste wma
Differential revision: https://reviews.freebsd.org/D14267
reflect what scripting language was compiled into the loader. I
anticipate that being able to find this out quickly from the OK prompt
will be useful in troubleshooting in the future.
Since it's not possible to unset a variable easily, create a new
variable 'PIC' to signal that we are creating a shared object that we
want to install. defs.mk refains from defining NO_PIC and ITNERALLIB
when PIC is defined. This unbreaks userboot.so building.
4 space indentation with a mix of tabs and spaces is a hassle. Update
to project-standard hard-tabs with 8-space indentation in these files.
This matches the new code coming in better as well.
As a followup to r328101, ignore relocation tables for ELF object
sections that are not memory resident. For modules loaded by the
loader, ignore relocation tables whose associated section was not
loaded by the loader (sh_addr is zero). For modules loaded at runtime
via kldload(2), ignore relocation tables whose associated section is
not marked with SHF_ALLOC.
Reported by: Mori Hiroki <yamori813@yahoo.co.jp>, adrian
Tested on: mips, mips64
MFC after: 1 month
Sponsored by: DARPA / AFRL
PowerPC Apple hardware, and likely all Open Firmware systems.
The loader would allocate memory for its heap at whatever address Open
Firmware gave it, which would in general be the lowest unallocated address,
usually starting a page or two above 0. As the kernel is linked at 1 MB,
and loader insists on running the kernel at its link address, any heap
larger than 1 MB would overlap the kernel, causing loader memory allocations
to corrupt the kernel and vice versa.
Although r328806 made this problem much worse by increasing the heap size
to 8 MB, causing 88% of the loader heap to overlap with the kernel, the
problem has always existed. The old heap size was 1 MB and, unless that
started exactly at zero, which would cause other problems, some number of
pages of the loader heap still overlapped with the kernel.
This patch solves the issue in two ways and cleans up some related code:
- Moves the loader heap inside of the loader. This guarantees that the
heap will be contiguous with the loader and simplifies the heap
allocation code at no cost, since the heap lives in BSS.
- Moves the loader, previously at 28 MB and dangerously close to the kernel
it loads, a bit higher to 44 MB. This has the effect of breaking loader
on non-embedded PPC machines with < 48 MB of RAM, but we did not support
those anyway.
The fundamental problem is that the way loader loads ELF files is
incredibly fragile, but that can't be fixed without fundamental
architectural changes.
MFC after: 10 days
The cross-endian loader change in r328536 (review D12422) broke symbol
loading on (at least) amd64 kernels. Temporarily paper over the issue
by restricting the cross-endian support to only powerpc, until a proper
fix arrives.
Submitted by: royger
preference to LIBFICL{,32}. LIBFICL{,32} are now always defined, but
LDR_INTERP{,32} is defined empty when building w/o forth (aka the
simple interpreter) and defined to LIBFICL{,32} when we are building
forth.
I had thought that this would be useful. However it was committed too
late, and wound up being unused. It's in the way of future work now,
so retire it rather than bring it forward.
loader scripts. However, that path won't be taken after all it
seems. Remove this code before it decays into uselessness. Also remove
build dependencies on forth no longer needed.
This has never been installed. It was added to the tree disconnected
to the build in FreeBSD 5 (17 years ago) and has never been used as
far as I can tell. The desired improvements never really happened
(despite a couple minor cleanups along the way). It's relevance is
long past, so better to retire it.
MK_CTF, MK_SSP, MK_PROFILE, NO_PIC, and INTERNALLIB are always the
same, so set them in defs.mk. MAN= is common, so set it here too.
This removes a lot of boring repetition from the Makefiles that added
almost no value.
Whether we should be overwriting the loaded FDT module with the 'fixed up'
version or not was questionable when this was added, and now that overlays
are possible this is downright wrong.
Overlays can increase the size of the blob, so writing it back to the
original VA will generally write past the end of the block and start
clobbering other things in memory.
Rip it out- it was questionable to begin with, it's doing bad things now,
and it serves no purpose since the modified blob will be copied into place
rather than relying on this to reflect the changes.
Reviewed by: gonzo
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14130
akin to what Pedro Souza and Wojciech Koszek did in the lua GSoC with
interp.h, interp_simple.c and changes to interp.c and interp_forth.c,
but completely redone from scratch.
This effectively restores the spirit of r326712 (my first attempt to
bring in Pedro's and Wojciech's work) updated for new requirements
that had silently broke their original work. This change also differs
by using fixed function names instead of function pointers to simply
things. Only one interpreter at a time may be compiled in.
Also of note: we take a mutable string, pass it in via a const char *
pointer into intrp_forth's interp_run(). We then cast away the const
to pass into ficlExec since ficl would require extensive changes to
properly const-poison. See Sections 6.5.2.5 and 6.7.3 of C11 standard
noting it's only UB if you modify a const object through a non-const
pointer, but not char [] -> const char * -> char * as here.
Move prototypes to proper section now that we don't have modified
versions of strtol and strtoul in libsa. Add prototypes for new
strtoll and strtoull. Use prototypes copied from stdlib.h instead of
the old hand-rolled ones.
(I forgot to move this file form my lua branch in r328613)
since they suffice. Create xlocale_private.h which provides the most
minimal locale implementation we can get away with. Add strtoll and
strtoull from libc.
On POWER8 with current petitpoot, the loader.kboot might be
run as little-endian application. The FreeBSD kernel is
always big-endian, so the load_elf_* routines must be aware
of proper endianness of all fields.
Submitted by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: IBM, QCM Technologies
Differential revision: https://reviews.freebsd.org/D12422
Example overlays seen in other places use a compatible property on root node
of an overlay to specify SOC compatibility. These don't get merged into base
FDT as they're not part of a fragment, but it's expected that consumers of
the overlay may want to check it.
If /compatible on the overlay is missing, just apply it. This is the "I know
what I'm doing" mode for those wanting to whip up a quick overlay and apply
it. An overlay intended for distribution should include /compatible so as
not to break a user's system.
If /compatible on the overlay exists, honor it and cross-check it with
/compatible on the base FDT. If /compatible on the base FDT is missing in
this case, don't apply the overlay rather than risk breaking the system.
Move the COPYOUT of overlay material to before we allocate space for
next_fdtp so that we can avoid the allocation and copy into next_fdtp if we
already know that the overlay can't apply.
This gives way to the possibility of autoloading overlays found in
/boot/overlays, since this provides a means of filtering out overlays not
applicable to the current board.
Reviewed by: gonzo
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D13969
This should have been done as part of r327350, but due to lack of foresight
it came later. In the different places we apply overlays, we duplicate the
bits that check for fdt_overlays in the environment and supplement that with
any other places we need to check for overlays to load. These "other places"
will be loader specific and are not candidates for consolidation.
Provide an fdt_load_dtb_overlays to capture the common logic, allow passing
in an additional list of overlays to be loaded. This additional list of
overlays is used in practice for ubldr to pull in any fdt_overlays passed to
it from U-Boot environment, but it can be used for any other source of
overlays.
These additional overlays supplement loader.conf(5) fdt_overlays, rather
than replace, so that we're not restricted to specifying overlays in only
one place. This is a change from previous behavior where loader.conf(5)
supplied fdt_overlays would cause us to ignore U-Boot environment, and this
seems nonsensical- user should have sufficient control over both of these
aspects, or lack of control for good reasons.
A knob could be considered in the future to ignore U-Boot supplied overlays,
but the supplemental treatment seems like a good start.
Reviewed by: imp (earlier version), gonzo (earlier version)
Differential Revision: https://reviews.freebsd.org/D13993
Specifically reading is done if ffs_sbget() and writing is done
in ffs_sbput(). These functions are exported to libufs via the
sbget() and sbput() functions which then used in the various
filesystem utilities. This work is in preparation for adding
subperblock check hashes.
No functional change intended.
Reviewed by: kib
These were found during bring-up on a new arm64 platform and in an
amd64 VM.
Submitted by: Arshan Khanifar <arshankhanifar_gmail.com>
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14036
This behavior also matches a Linux-ism by allowing fdt_overlays to specify
names of overlays without an extension, e.g. fdt-overlays="sunxi-h3-h5-emac"
If we fail to load the file given by a name in fdt_overlays, try again with
".dtbo" appended to it. This still allows overlays to lack .dtbo extension
if user prefers it and just adds a fallback cushion.
Future work could move this from a hard-coded ".dtbo" to a loader.conf(5)
configuration option.
Reviewed by: gonzo
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D13968
Right now, we'll leak memory when we display a help topic because we
don't free t, s, d that we've just used when breaking out of the loop.
NB: coverity just reported t, but s and d also leak.
CID: 1007776
Always free dev and fstyp before strduping new values to assign to
them. Free them at the end of the loop. This keeps them from leaking
for mal-formed /etc/fstab lines.
CID: 1007777, 1007778, 1007779
Sponsored by: Netflix
When building loader bits, lld fails with the following error:
"ld: error: section: .dynamic is not contiguous with other relro sections"
on both ubldr and EFI loader.
Move .dynamic up to make ld.lld happy, adjust .got as necessary for ubldr.
Tested on: OrangePi One (ld.lld, ubldr)
Tested on: Banana Pi-M3 (ld.lld, ubldr)
Tested on: qemu-armv7 (ld.lld, EFI)
Tested on: qemu-armv7 (ld.bfd, EFI)
Tested on: Raspberry Pi 2 (ld.bfd, ubldr) [manu]
Tested on: Banana Pi-M2 (ld.bfd, ubldr) [manu]
Reviewed by: andrew, emaste, imp
Differential Revision: https://reviews.freebsd.org/D13942
This matches directory structure used commonly in Linux-land, and it's
cleaner than mixing overlays into the existing module paths. Overlays are
still mixed in by specifying fdt_overlays in loader.conf(5).
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D13922
libfdt highlights since 1.4.3:
- fdt_property_placeholder added to create a property without specifying its
value at creation time
- stringlist helper functions added to libfdt
- Improved overlay support
- Various internal cleanup
Also switch stand/fdt over to using libfdt for overlay support with this
update. Our current overlay implementation works only for limited use cases
with overlays generated only by some specific versions of our dtc(1). Swap
it out for the libfdt implementation, which supports any properly generated
overlay being applied to a properly generated base.
This will be followed up fairly soon with an update to dtc(1) in tree to
properly generate overlays.
MFC note: the <stdlib.h> include this update introduces in libfdt_env.h is
apparently not necessary in the context we use this in. It's not immediately
clear to me the motivation for it being introduced, but it came in with
overlay support. I've left it in for the sake of accuracy and because it's
not harmful here on HEAD, but MFC'ing this to stable/11 will require
wrapping the #include in an `#ifndef _STANDALONE` block or else it will
cause build failures.
Tested on: Banana Pi-M3 (ARMv7)
Tested on: Pine64 (aarch64)
Tested on: PowerPC [nwhitehorn]
Reviewed by: manu, nwhitehorn
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D13893
ELF object files can contain program sections which are not supposed
to be loaded into memory (e.g. .comment). Normally the static linker
uses these flags to decide which sections are allocated to loadable
program segments in ELF binaries and shared objects (including kernels
on all architectures and kernel modules on architectures other than
amd64).
Mapping ELF object files (such as amd64 kernel modules) into memory
directly is a bit of a grey area. ELF object files are intended to be
used as inputs to the static linker. As a result, there is not a
standardized definition for what the memory layout of an ELF object
should be (none of the section headers have valid virtual memory
addresses for example).
The kernel and loader were not checking the SHF_ALLOC flag but loading
any program sections with certain types such as SHT_PROGBITS. As a
result, the kernel and loader would load into RAM some sections that
weren't marked with SHF_ALLOC such as .comment that are not loaded
into RAM for kernel modules on other architectures (which are
implemented as ELF shared objects). Aside from possibly requiring
slightly more RAM to hold a kernel module this does not affect runtime
correctness as the kernel relocates symbols based on the layout it
uses.
Debuggers such as gdb and lldb do not extract symbol tables from a
running process or kernel. Instead, they replicate the memory layout
of ELF executables and shared objects and use that to construct their
own symbol tables. For executables and shared objects this works
fine. For ELF objects the current logic in kgdb (and probably lldb
based on a simple reading) assumes that only sections with SHF_ALLOC
are memory resident when constructing a memory layout. If the
debugger constructs a different memory layout than the kernel, then it
will compute different addresses for symbols causing symbols in the
debugger to appear to have the wrong values (though the kernel itself
is working fine). The current port of mdb does not check SHF_ALLOC as
it replicates the kernel's logic in its existing kernel support.
The bfd linker sorts the sections in ELF object files such that all of
the allocated sections (sections with SHF_ALLOCATED) are placed first
followed by unallocated sections. As a result, when kgdb composed a
memory layout using only the allocated sections, this layout happened
to match the layout used by the kernel and loader. The lld linker
does not sort the sections in ELF object files and mixed allocated and
unallocated sections. This resulted in kgdb composing a different
memory layout than the kernel and loader.
We could either patch kgdb (and possibly in the future lldb) to use
custom handling when generating memory layouts for kernel modules that
are ELF objects, or we could change the kernel and loader to check
SHF_ALLOCATED. I chose the latter as I feel we shouldn't be loading
things into RAM that the module won't use. This should mostly be a
NOP when linking with bfd but will allow the existing kgdb to work
with amd64 kernel modules linked with lld.
Note that we only require SHF_ALLOC for "program" sections for types
like SHT_PROGBITS and SHT_NOBITS. Other section types such as symbol
tables, string tables, and relocations must also be loaded and are not
marked with SHF_ALLOC.
Reported by: np
Reviewed by: kib, emaste
MFC after: 1 month
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D13926
is NULL. That's more correct and doesn't depend on the error behavior
of utf8_to_ucs2. In practice, we'll never see this though since we
pass utf8_to_ucs2 a well formed string.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D13918
and utf8_to_ucs2, be sure to NULL out the return pointer too, rather
than return a pointer to free memory.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D13917
utf8_to_ucs2 in boot1.efi. We need to initialise the ucs2 output string
so it will allocate space, and use the return value to determine if the
call was successful.
Reviewed by: imp
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D13915
If fdt_overlay_apply fails at some stage to apply the overlay to the base,
both the base and overlay may be in an inconsistent state (some fixups
applied, some phandles adjusted, some symbols merged). These can be bad for
a number of reasons, to include user frustration if some fixups applied and
not others. Fail a little safer by making a clean copy of the base FDT for
every overlay that we can simply discard if things go awry.
This also allows us the luxury of simply discarding overlays if we hit some
kind of memory limit or if they're malformed and extremely large for some
reason. We'll now leave a nice error message indicating that some overlays
could not be applied due to size restrictions and we apply what we can.
I note that our overlay implementation has some flaws that might still leave
your system in an unbootable state even if an overlay applies correctly;
please exercise caution in using overlays until we can swap it out for
libfdt's implementation.
Tested on: BananaPi-M3 (armv7)
Tested on: Pine64 (aarch64)
Differential Revision: https://reviews.freebsd.org/D13709
Use simple "foo" rather than "${.CURDIR}/foo" to include Makefile.fat
since the former works when including this Makefile from else
where. Also, use full path from ${BOOTSRC} to the FAT templates for
similar reasons. It doesn't change anything in base FreeBSD, but
allows us to have a custom boot1.efi more easily (though that will be
short-lived for us, it may also be helpful for others).
Sponsored by: Netflix
