> According to the datasheet, the C8051F120 has 256 B __idata memory that > can be used for the stack. By default, SDCC uses the the 128B __data > memory (the lower part half of __idata) for the stack. And indeed, when > compiling a program using --model-large --stack-auto, it only uses > __data and runs out of stack space soon. > SDCC has the --xstack option to place the stack in the 256 B __pdata. > > But is using the 256 B __idata for the stack possible in SDCC? > > Philipp
SDCC already uses the full 256 bytes of __idata (minus registers, bits, and allocated variables and spills in __data/__idata). I don't understand why you believe it doesn't. Using --xstack is less efficient than without. But it places return addresses on normal stack and data on xstack. Further xstack can use the full 256 bytes of __pdata. So it provides more stack space. Maarten ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
