| /* linux-crt0 -- Startup routines for the Linux BSP. |
| * |
| * Copyright (c) 2011 Edgar E. Iglesias |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| .section .text |
| .globl _start |
| .ent _start |
| .type _start, @function |
| _start: |
| la r13, r0, _SDA_BASE_ |
| la r2, r0, _SDA2_BASE_ |
| |
| brlid r15, __init |
| nop |
| |
| lwi r5, r1, 0 |
| addik r6, r1, 4 |
| |
| # Add argc * 4. |
| addk r7, r5, r5 |
| addk r7, r7, r7 |
| |
| brlid r15, main |
| # Now add 4 + r1 (i.e r6) in the delayslot. |
| addk r7, r7, r6 |
| |
| brlid r15, exit |
| addik r5, r3, 0 |
| .size _start, . - _start |
| .end _start |
| |
| /* Replacement for the GCC provided crti.S. This one avoids the |
| setup of stack protection regs (which result in privilieged |
| insn exceptions when running in user-space). */ |
| .section .init, "ax" |
| .global __init |
| .align 2 |
| __init: |
| addik r1, r1, -8 |
| sw r15, r0, r1 |
| |
| .section .fini, "ax" |
| .global __fini |
| .align 2 |
| __fini: |
| addik r1, r1, -8 |
| sw r15, r0, r1 |
