>The ASM output file is:
>mov ip, sp
>stmdb sp!, {fp, ip, lr, pc}
>sub fp, ip, #4
>mov sp, #20480 ; 0x5000
>...
>
>because I use -e start to tell compiler that the
>function start() is the first function run after power
>on, the compiler should not generate the first 3
>instruction ahead of my inlined assembler code.
Declare your function with attribute((naked)). As the manual says:
@item naked
@cindex function without a prologue/epilogue code
Use this option on the ARM or AVR ports to indicate that the specified
function do not need prologue/epilogue sequences generated by the
compiler. It is up to the programmer to provide these sequences.
p.
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