I dont have that exact device to test with, but tried a test with a different MSP430 device by placing the .text:_isr:_c_int00_noexit section at a fixed address and didnt have any issues reaching main/running the code.
Aer you able to share your project? (zip it up and attach it here). I may not be able to run it but can take a look at the linker command files/map files etc to see if anything else stands out.