/* * libc/sysdeps/linux/v850/crt0.S -- Initial program entry point for linux/v850 * * 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): ld.w 0[sp], r6 // Arg 0: argc addi 4, sp, r7 // Arg 1: argv mov r7, r8 // Arg 2: envp mov r6, r10 // skip argc elements to get envp start add 1, r10 // ...plus the NULL at the end of argv shl 2, r10 // Convert to byte-count to skip add r10, r8 // Zero bss area, since we can't rely upon any loader to do so mov hilo(C_SYMBOL_NAME(edata)), ep mov hilo(C_SYMBOL_NAME(end)), r10 2: cmp ep, r10 be 3f sst.w r0, 0[ep] add 4, ep br 2b // Load CTBP register 3: mov hilo(C_SYMBOL_NAME(_ctbp)), r19 ldsr r19, ctbp // Load GP mov hilo(C_SYMBOL_NAME(_gp)), gp // call uclibc's startup routine jarl C_SYMBOL_NAME(__uClibc_main), lp // should never get here.... jr C_SYMBOL_NAME(abort)