Sorry: BLX.
-Michael
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... And of course when using a memory cell to store a procedure
address, BX is used to call the procedure.
-Michael
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On 07/15/2010 11:33 AM, Jeppe Johansen wrote:
I think it is on Thumb2 devices. To my understanding, they did so on
purpose so you no longer have to use interwork intermidiate functions
to switch between arm and thumb mode
That seems to be not BL but BX:
http://infocenter.arm.com/help/topic/
I think it is on Thumb2 devices. To my understanding, they did so on
purpose so you no longer have to use interwork intermidiate functions to
switch between arm and thumb mode
Michael Schnell skrev:
On 07/15/2010 11:12 AM, Geoffrey Barton wrote:
A normal procedural call seems to assemble as
On 07/15/2010 11:12 AM, Geoffrey Barton wrote:
A normal procedural call seems to assemble as a 'BL' to an even address?
I doubt that it's possible to call thumb code from "ARM" code with a "BL".
-Michael
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Geoffrey Barton wrote on Thu, 15 Jul 2010:
On 14 Jul 2010, at 17:35, Jonas Maebe wrote:
To identify the code as Thumb code.
I was aware of the requirement to add one to the address of an ISR,
but not to other calls.
The address of the symbol is set to an odd value so that the linker
c
On 14 Jul 2010, at 17:35, Jonas Maebe wrote:
Geoffrey Barton wrote on Wed, 14 Jul 2010:
the resulting constant disassembles as:-
1bc:01a5.word 0x01a5
which seems to be one greater than the address of the procedure.
Is this right?
Yes.
If so, why?
To identify the
Geoffrey Barton wrote on Wed, 14 Jul 2010:
the resulting constant disassembles as:-
1bc:01a5.word 0x01a5
which seems to be one greater than the address of the procedure.
Is this right?
Yes.
If so, why?
To identify the code as Thumb code.
also, why does the compiler
disassembling from an elf file produce by FPC cross-assembling for arm
embedded, an empty procedure:-
procedure UART0int:nostackframe;
begin
end;
looks like this:-
01a4 :
1a4: 46f7mov pc, lr
1a6: 46c0nop (mov r8, r8)
if I grab the ad
