/* * libc/sysdeps/linux/nios2/crt0.S -- entry point for linux/nios2 * * Copyright (C) 2004,05,06 Microtronix Datacom Ltd * * 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 Wentao Xu <wentao@microtronix.com> * Updated by Thomas Chou <thomas@wytron.com.tw> for crt1.S * */ #include <features.h> #include <asm/unistd.h> .global _start .type _start,@function .type _init,%function .type _fini,%function #ifndef __UCLIBC_CTOR_DTOR__ .weak _init .weak _fini #endif .type main,@function .type __uClibc_main,@function .type __h_errno_location, @function .type _stdio_init, @function .type _stdio_term, @function .text .balign 4 _start: nop br 0f 0: /* load gp */ movhi gp, %hiadj(_gp) addi gp, gp, %lo(_gp) /* load main, argc, argv from stack */ movhi r4, %hi(main) ori r4, r4, %lo(main) /* main */ ldw r5, 0(sp) /* argc */ ldw r6, 4(sp) /* argv */ /* load the 4th arg */ movhi r7, %hi(_init) ori r7, r7, %lo(_init) /* Allocate space on the stack for 6-7th arg, reuse 5th space */ addi sp,sp,-8 /* push 5-7th args on stack */ movhi r8, %hi(_fini) ori r8, r8, %lo(_fini) stw r8, 0(sp) stw r2, 4(sp) /* rtld_fini */ stw sp, 8(sp) /* stack_end */ /* call uClibc_main, shouldn't return */ #ifdef __PIC__ /* just pray 16 bit offset is enough */ br __uClibc_main #else call __uClibc_main #endif /* crash in the event of return */ __exit: movui r2, TRAP_ID_SYSCALL movui r3, __NR_exit trap