[chintan8]

Hello, I have written simple program to switch from ARM to Thumb mode as below. When "bx" instruction is execute it switch to thumb mode. In disassembly window "mov r0,#0x00" instruction in converted to "0x00000014 0000 LSL R0,R0,#0
0x00000016 E3A0 B 0x0000075A"
So its not comming to next instruction and branch to 0x0000075A location. Is there require any setting to execute thumb instruction? I have enable arm/thumb internetworking.

area AA, code, readonly
export __main
__main
mov r8,#0x80
adr r2,a
add r2,0x01
bx r2
mov r7,#0xff
a mov r0,#0x00
mov r1,#0xff
end

[mharnisch]

(Please don't forget code tags in your postings)

I can't see a directive telling the assembler that beginning at label a there will be Thumb instructions. When I insert a THUMB directive (and make the code UAL compliant to suppress warnings), the disassembler output is correct.

    	area AA, code, readonly
    	export __main
__main
    	mov r8,#0x80
    	adr r2,a
    	add r2,#0x01
    	bx  r2
    	mov r7,#0xff
    	thumb
a
    	movs r0,#0x00
    	movs r1,#0xff
    	end

fromelf -c says:

	$a
	AA
	__main
    	0x00000000:	e3a08080	....	MOV  	r8,#0x80
    	0x00000004:	e28f2008	. ..	ADR  	r2,{pc}+0x10 ; 0x14
    	0x00000008:	e2822001	. ..	ADD  	r2,r2,#1
    	0x0000000c:	e12fff12	../.	BX   	r2
    	0x00000010:	e3a070ff	.p..	MOV  	r7,#0xff
	$t
    	0x00000014:	2000    	.   	MOVS 	r0,#0
    	0x00000016:	21ff    	.!  	MOVS 	r1,#0xff