| /* | |
| * Lattice Mico32 C startup code. | |
| * Contributed by Jon Beniston <jon@beniston.com> | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| * SUCH DAMAGE. | |
| */ | |
| .section .boot, "ax", @progbits | |
| /* Program starts here */ | |
| .global _start | |
| _start: | |
| /* Setup stack and global pointer */ | |
| mvhi sp, hi(_fstack) | |
| ori sp, sp, lo(_fstack) | |
| mvhi gp, hi(_gp) | |
| ori gp, gp, lo(_gp) | |
| /* Clear BSS */ | |
| mvhi r1, hi(_fbss) | |
| ori r1, r1, lo(_fbss) | |
| mvi r2, 0 | |
| mvhi r3, hi(_ebss) | |
| ori r3, r3, lo(_ebss) | |
| sub r3, r3, r1 | |
| calli memset | |
| /* Call C++ constructors */ | |
| calli _init | |
| /* Call C++ destructors on exit */ | |
| mvhi r1, hi(_fini) | |
| ori r1, r1, lo(_fini) | |
| calli atexit | |
| /* Call main program */ | |
| mvi r1, 0 | |
| mvi r2, 0 | |
| mvi r3, 0 | |
| calli main | |
| /* Call exit, which doesn't return, to perform any clean up */ | |
| calli exit |