Does anybody know how to insert a pointer into an inline assembler sequence?
The following works but loads registers R13..R15 with data not with
pointers.
void _reset_vector__(void) {
...
// zero uninitialized RAM
asm( " \n\
mov %0,r15 ; load r15 with end of .text segment \n\
mov %1,r14 ; load ram start \n\
mov %2,r13 ; end of data segment \n\
cmp r14,r13 \n\
jeq Lend_of_data_loop \n\
Lcopy_data_loop: \n\
; copy data from @r15 to @r14 \n\
mov.b @r15+,@r14 ; move one byte \n\
inc r14 \n\
cmp r13,r14 ; check if end of data reached \n\
jlo Lcopy_data_loop \n\
Lend_of_data_loop: \n\
"
:
: "m" (_etext), "m" (__data_start), "m" (_edata)
: "r13", "r14", "r15");
...
}
I tried the sequence "i" (&_etext) , but that is an error.
Thanks in advance!
