On 21 Dec 2011, at 10:43, fpc-devel-requ...@lists.freepascal.org wrote:
> From: Jeppe Græsdal Johansen <jjoha...@student.aau.dk>
> Subject: Re: [fpc-devel] arm embedded on 2.6.0rc1
> Date: 20 December 2011 21:20:07 GMT
> To: FPC developers' list <fpc-devel@lists.freepascal.org>
> Reply-To: FPC developers' list <fpc-devel@lists.freepascal.org>
>
>
> Den 20-12-2011 21:51, Geoffrey Barton skrev:
>> I have been trying to cross-compile arm embedded for a cortexm3 using
>> 2.6.0rc1. I had this working previously with 2.4.0 and stellaris controllers.
>>
>> Following the instructions on the wiki page 'TARGET_Embedded' and adding
>> suitable devices into cpuinfo etc. where they have been missed out, I can
>> build a test program. However disassembling the resulting elf file shows the
>> sections system_fpc_cpuuint, system_sysinitfpu, fpc_initializeunits,
>> fpc_initializeunitsetc, system_internalexit, fpc_do_exit, system_system_exit
>> and init$_system to be 32 bit arm code not thumb2. The rest of the program,
>> including the stellaris.pp code, are correct thumb2 code.
>>
>> It appears the armv7m subarch is not being acted on when compiling rtl? I
>> got the same result if I substituted cortexm3 for this too.
>>
>> Geoffrey
>>
>>
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> Do you have an example of how you can see it is 32 bit arm code and not
> thumb2?
previously:-
00005cf4 <SYSTEM_FPC_CPUINIT>:
5cf4: 46ec mov ip, sp
5cf6: e92d 4800 stmdb sp!, {fp, lr}
5cfa: 46e3 mov fp, ip
5cfc: b08a sub sp, #40
5cfe: f000 f803 bl 5d08 <SYSTEM_SYSINITFPU>
5d02: 46dd mov sp, fp
5d04: e91d 8800 ldmdb sp, {fp, pc}
now:-
00005d88 <SYSTEM_FPC_CPUINIT>:
5d88: e92d4000 push {lr}
5d8c: e24dd004 sub sp, sp, #4
5d90: e59f0010 ldr r0, [pc, #16] ; 5da8
<SYSTEM_FPC_CPUINIT+0x20>
5d94: e5d00000 ldrb r0, [r0]
5d98: e3500000 cmp r0, #0
5d9c: 0b000002 bleq 5dac <SYSTEM_SYSINITFPU>
5da0: e28dd004 add sp, sp, #4
5da4: e8bd8000 pop {pc}
5da8: 20000018 andcs r0, r0, r8, lsl r0_______________________________________________
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