Date: Fri, 25 Jul 2014 21:21:33 -0300 From: Pedro Arthur <bygrandao@gmail.com> To: soc-status@FreeBSD.org Subject: Weekly report (ALL) - Lua loader Message-ID: <CAKN1MR5nodgTaNAkP1taNbE7Zp=2O4b2B3_xzGvU7cZYuLxzpA@mail.gmail.com>
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Hi,
I realized I was not sending my weekly report to soc-status@FreeBSD.org
besides my mentor, so I decide to group all my previous report in a single
email.
---------------------- WEEKLY REPORT 26/05 -----------------------
Lua loader (Pedro Souza)
I'll include in this report the work done in the weeks before the gsoc
start.
Tasks done:
- Decouple forth interpreter from loader interpreter. Now any interpreter
should use the intereface:
typedef void interp_init_t(void *ctx);
typedef int interp_run_t(void *ctx, const char *input);
typedef int interp_incl_t(void *ctx, const char *filename);
struct interp {
interp_init_t *init;
interp_run_t *run;
interp_incl_t *incl;
void *context;
};
- Implemented the interpreter interfaces for the loader simple commands
(interp_simple) and forth (interp_forth).
- Included the lua 5.2.3 source code into head/sys/boot/
- Fixed the lua code to compile a minimal lua interpreter without C std
libs (using libstand) and implemented the missing functionalities (partial)
in head/sys/boot/lua/src/lstd.c
- Added interp_lua interface with interp_incl_t disabled (to not conflict
with loader.rc)
- Added "print" and "perform" functions to lua interpreter which prints to
the console and perform a loader comand (boot, load, ...) respectively.
Bugs found:
Some times when I compile and install a loader (in my case zfsloader) when
I reboot I get the message "Invalid format" from the boot2. I'm almost sure
it's a bug because I had the following code in my loader interp_init_t:
printf("some string"); <-- then I get the invalid format
I changed it to:
printf("some string __"); <-- and now it runs fine.
To be sure I changed it back to the previous code and got the same invalid
format error.
So always I do some change in the loader and I get a invalid format error I
just remove/add some characters in any printf string and it works fine.
Links:
Code repo: pedrosouza/lua_loader/head/
Wiki page: LuaLoader
---------------------- WEEKLY REPORT 09/06 -----------------------
This week I focused on checking if the lua interpreter was working
properly. Besides minor changes I did the following changes:
Fixed a bug where numbers were not parsed.
Implemented interp_lua_incl
Improve double to string conversion.
Sync branch with head
Now I'll start to work on the lua scripts.
---------------------- WEEKLY REPORT 16/06 -----------------------
This week I dedicated myself to read the Forth script files and
get a more deep understanding of them.
I also started to plan how I'll structure the lua scripts and which
function bindngs are needed. Some of those functions I already
implemented. I plan to have some kind of loader menu done in
lua until the weekend.
---------------------- WEEKLY REPORT 23/06 -----------------------
This week I worked in the lua boot menu scripts, and added some C
functions needed to the lua interpreter. The menu contains almost the
options found in the Forth menu and is functional.
- Added getenv function to lua
- Added std functions needed to support lua aux lib (lauxlib.c) and lua
base lib (lbaselib.c)
- Added loader.lua, menu.lua, core.lua which provides a simple boot menu
---------------------- WEEKLY REPORT 30/06 -----------------------
This week I worked on the menu drawing, the menu box, brand and logo.
I also started reading the forth script which handles boot password and
I intend to implement it for the next week and polish the menu drawing.
---------------------- WEEKLY REPORT 07/07 -----------------------
This week I worked in the boot password check and the .conf file parsing.
Following there are the changes made:
- Added password.lua which handles boot & loader password.
- Added the lua string library (lstrlib.c)
- Added file handling functions (io.open, io.close and io.read)
- Added config.lua which parses .conf files (WIP)
---------------------- WEEKLY REPORT 14/07 -----------------------
This week I continued to work on the .conf files loading (parse & execute).
The loading code is
almost done it can correctly load modules, the only issue is the handling
of Forth commands
contained in 'exec' and possible 'module_after', 'module_before',
'module_error' which I've not found a
solution yet. I also started to work on the kernel loading from env var
'bootfile', 'kernel' and modules
path.
---------------------- WEEKLY REPORT 21/07 -----------------------
This week I almost finished the kernel loading and module parsing. I also
started to read the
php.4th file but I was not able to fully understand it. I'll continue to
work on it but if someone has
experience with the pnp.4th script and can help me with it I would
appreciate it.
---------------------------------------------------------------------------------
Regards,
Pedro.
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