In general (i.e. untested ;) you'd add a linker script snippet like
this:
section_TAO 0xC400 : {
*(.myfuncsec_TAO)
}
Then tag your function with a section attribute:
static void __interrupt __attribute__((section(".myfuncsec_TAO")))
Timer0_A0_alter(void)
{
}
The key here is that you can change the section a function (or
anything, like data or tables) is in, and the linker knows how to put
specific sections at specific addresses.
Note that this only works if *other* output sections in the link do
not overlap. I typically avoid the examples above, and instead use
memory regions, that way I know they won't overlap or overflow.
MEMORY {
MYFUNCSEC (r) : ORIGIN = 0x0c400, LENGTH = 0x00400
}
section_TAO : {
*(.myfuncsec_TAO)
} > MYFUNCSEC
Note that you can also do per-file placement, by replacing the '*' wildcard
with the file name you want:
section_TAO {
int_a0.o(.text)
} > MYFUNCSEC
but if there are other .text things in that object that you're not
aware of, that won't guarantee that the specific handler is at the
address you want.
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