| /* |
| * libc/sysdeps/linux/microblaze/crt0.S -- Initial program entry point for linux/microblaze |
| * |
| * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> |
| * Copyright (C) 2001,2002 NEC Corporation |
| * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org> |
| * |
| * This file is subject to the terms and conditions of the GNU Lesser |
| * General Public License. See the file COPYING.LIB in the main |
| * directory of this archive for more details. |
| * |
| * Written by Miles Bader <miles@gnu.org> |
| */ |
| |
| #include <clinkage.h> |
| |
| /* Upon entry, the stack contains the following data: |
| argc, argv[0], ..., argv[argc-1], 0, envp[0], ..., 0 |
| */ |
| |
| .text |
| C_ENTRY(_start): |
| lw r5, r0, r1 /* Arg 0: argc */ |
| |
| addi r6, r1, 4 /* Arg 1: argv */ |
| |
| /* Arg 2: envp */ |
| addi r3, r5, 1 /* skip argc elements to get envp start */ |
| /* ...plus the NULL at the end of argv */ |
| add r3, r3, r3 /* Make word offset */ |
| add r3, r3, r3 |
| add r7, r6, r3 /* add to argv to get offset */ |
| |
| /* tail-call uclibc's startup routine */ |
| brid C_SYMBOL_NAME(__uClibc_main) |
| nop |
| |
| |
| /* Stick in a dummy reference to `main', so that if an application |
| is linking when the `main' function is in a static library (.a) |
| we can be sure that `main' actually gets linked in. */ |
| L_dummy_main_reference: |
| .long C_SYMBOL_NAME(main) |
| |
| /* Define a symbol for the first piece of initialized data. */ |
| .data |
| .globl __data_start |
| __data_start: |
| .long 0 |
| .weak data_start |
| data_start = __data_start |
| |