cool
that gives me enough info to duplicate
I'll add it to my list
can you also file an issue on the tp-freeforall github issues page?
From cPhone
On Feb 24, 2013, at 7:40 AM, Martin Zoller <martin.zol...@tinynode.com> wrote:
> I'm using the tp-freeforall/prod repository. To avoid any doubt I retested it
> on a new clone of the repository.
> To the Makefile of Blink I added:
> CFLAGS += -ffunction-sections -fdata-sections
>
> As far as I understand, the problem is caused by the MSP430REG_NORACE_EXPAND
> macro in msp430hardware.h: It generates asm statements which reference a
> memory address, rather than a symbol. Unfortunately I don't know enough about
> macros to be able to fix this right now.
>
> However I've noticed that only -fdata-sections is troublesome, and
> -ffunction-sections works fine. So by using
> CFLAGS += -Wl,--section-start=.text=0xBC00
> CFLAGS += -ffunction-sections -mdata-region=far
> LDFLAGS += -Wl,--gc-sections
> I can achieve my goal of splitting the app into a "near" and a "far" part
> without wasting memory in between.
> Of course this only works as long as the "far" part is larger than the data
> section.
> Note that my app's "near" part starts at 0xBC00; the lower 30k of flash are
> used by a bootloader and a second app.
>
>
> Martin
>
> On 02/23/2013 12:57 AM, Eric Decker wrote:
>>
>>
>> I've built Blink for near memory using 4.7 without problem for a 5437a.
>> I've also build Blink for the telosb without problems.
>>
>> I haven't tried different memory models.
>>
>> Not sure what exactly martin is using... ie. what source tree.
>>
>> The current new msp430 core code can be obtained via git from
>> https://github.com/tp-freeforall/prod
>>
>> On Fri, Feb 22, 2013 at 9:58 AM, Peter Bigot <big...@acm.org> wrote:
>> Figure out why those asm statements are getting emitted and
>> replace it with
>> something that references a linker symbol like __P3OUT and __P4OUT.
>>
>> I believe Eric Decker was looking into reworking the MSP430 port support in
>> TinyOS to fix this.
>>
>> Peter
>>
>> On Fri, Feb 22, 2013 at 11:49 AM, Martin Zoller
>> <martin.zol...@tinynode.com>wrote:
>>
>> > Hi,
>> > I'm experimenting with the -ffunction-sections and -fdata-sections
>> > parameters of mspgcc.
>> > The goal is to split a TinyOS application between near and far flash
>> > memory using the large memory model. If I do this without special compile
>> > parameters, only a small amount of code ends up in the .text section
>> > (presumably the ISRs), and the rest is put in .far.text, rather than
>> > filling up .text first.
>> >
>> > Now unfortunately -ffunction-sections and -fdata-sections seem to be
>> > broken in mspgcc 4.7.0 20120911.
>> > For example, if I compile the TinyOS Blink application for telosb with
>> > them, I get:
>> >
>> > /tmp/ccb7btaA.s:1220: Error: Missing symbol name in directive
>> > /tmp/ccb7btaA.s:1220: Error: junk at end of line, first unrecognized
>> > character is `x'
>> > /tmp/ccb7btaA.s:1221: Error: expected comma after name `' in .size
>> > directive
>> > /tmp/ccb7btaA.s:1222: Error: junk at end of line, first unrecognized
>> > character is `0'
>> > /tmp/ccb7btaA.s:1224: Error: Missing symbol name in directive
>> > /tmp/ccb7btaA.s:1224: Error: junk at end of line, first unrecognized
>> > character is `x'
>> > /tmp/ccb7btaA.s:1225: Error: expected comma after name `' in .size
>> > directive
>> > /tmp/ccb7btaA.s:1226: Error: junk at end of line, first unrecognized
>> > character is `0'
>> > /tmp/ccb7btaA.s:1229: Error: Missing symbol name in directive
>> > ... and lots more of those.
>> >
>> > The problem is that the assembler code contains addresses instead of
>> > symbol names:
>> > .LIRD0:
>> > .size main, .-main
>> > .section .bss.0x0019,"aw",@nobits
>> > .type 0x0019, @object ;Line 1220
>> > .size 0x0019, 1
>> > 0x0019:
>> > .zero 1
>> > .type 0x0019, @object
>> > .size 0x0019, 1 ;Line 1225
>> > 0x0019:
>> > .zero 1
>> > .section .bss.0x001D,"aw",@nobits
>> > .type 0x001D, @object
>> > .size 0x001D, 1 ;Line 1230
>> >
>> > I tried this without any special options, i.e. with memory model "none".
>> > It compiles fine on mspgcc 4.6.3 20120406.
>> > The thread at [1] mentions the same issue, but without a solution. And in
>> > [2] Peter suggests the problem is caused by the asm statement, which is
>> > treated differently by gcc 4.7.
>> > However, the code above seems to correspond to the following declarations
>> > in app.c (each appearing in several functions):
>> >
>> > static volatile uint8_t r __asm("0x0019");
>> > static volatile uint8_t r __asm("0x001D");
>> >
>> > So they are already static.
>> > Is there a known workaround for this issue?
>> >
>> >
>> > Thanks,
>> > Martin
>> >
>> > [1] - http://lists.gnu.org/archive/**html/bug-binutils/2012-10/**
>> > msg00111.html<http://lists.gnu.org/archive/html/bug-binutils/2012-10/msg00111.html>
>> > [2] - http://sourceforge.net/**mailarchive/forum.php?thread_**name=**
>> > CAPOJ94M1tobePYig6XdJjwTVamFj1**DC2uDFyUu%3DZChzFHBApUw%**
>> > 40mail.gmail.com&forum_name=**mspgcc-users<http://sourceforge.net/mailarchive/forum.php?thread_name=CAPOJ94M1tobePYig6XdJjwTVamFj1DC2uDFyUu%3DZChzFHBApUw%40mail.gmail.com&forum_name=mspgcc-users>
>> >
>> > --
>> >
>> > Martin Zoller ? Tinynode <http://www.tinynode.com/> ? System Architect ?
>> > Lausanne ? D: +41 21 510 11 81 ? F: +41 21 510 11 71 ?
>> > martin.zol...@tinynode.com
>> > <mailto:martin.zoller@**tinynode.com<martin.zol...@tinynode.com>
>> > >
>> >
>> >
>> >
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>>
>>
>> --
>> Eric B. Decker
>> Senior (over 50 :-) Researcher
>>
>
>
> --
> Martin Zoller ● Tinynode ● System Architect ● Lausanne ● D: +41 21 510 11 81
> ● F: +41 21 510 11 71 ● martin.zol...@tinynode.com
>
> New postal address from 12/15/2012: Tinynode SA, Boulevard de Grancy 19A,
> 1006 Lausanne
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