Compiler Runtime Environment
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/DISCARD/ : { *(.note.GNU-stack) }
5.9
RAM FUNCTIONS
Functions may be located in RAM to improve performance. The __ramfunc__ and
__longramfunc__ specifiers are used on a function declaration to specify that the
function will be executed out of RAM.
Functions specified as a RAM function will be copied to RAM by the startup code and
all calls to those functions will reference the RAM location. Functions located in RAM
will be in a different 512MB memory segment than functions located in program
memory, so the longcall attribute should be applied to any RAM function which will
be called from a function not in RAM. The __longramfunc__ specifier will apply the
longcall attribute as well as place the function in RAM 1 .
/* function ‘foo’ will be placed in RAM */
void __ramfunc__ foo (void)
{
}
/* function ‘bar’ will be placed in RAM and will be invoked
using the full 32 bit address */
void __longramfunc__ bar (void)
{
}
1. Specifying __longramfunc__ is functionally equivalent to specifying both __ramfunc__ and
__longcall__ .
? 2007 Microchip Technology Inc.
DS51686A-page 85
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