From 353d7633be470de63e3eb1f0ec5a83dcf111f759 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 24 Jan 2006 23:49:03 +0000 Subject: first (broken) pass at updating to new crt style --- libc/sysdeps/linux/bfin/crt0.S | 68 -------------------------------------- libc/sysdeps/linux/bfin/crt1.S | 74 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+), 68 deletions(-) delete mode 100644 libc/sysdeps/linux/bfin/crt0.S create mode 100644 libc/sysdeps/linux/bfin/crt1.S (limited to 'libc') diff --git a/libc/sysdeps/linux/bfin/crt0.S b/libc/sysdeps/linux/bfin/crt0.S deleted file mode 100644 index 4ddfd16b9..000000000 --- a/libc/sysdeps/linux/bfin/crt0.S +++ /dev/null @@ -1,68 +0,0 @@ -/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. - -This file is part of the GNU C Library. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - - -/* When we enter this piece of code, the user stack looks like this: -* argc argument counter (integer) -* argv[0] program name (pointer) -* argv[1...N] program args (pointers) -* NULL -* env[0...N] environment variables (pointers) -* NULL - -* When we are done here, we want -* R0=argc -* R1=*argv[0] -* R2=*envp[0] -*/ - -.text -.align 2 -.global _start; -.type _start,STT_FUNC; -.global ___uClibc_main; -.type ___uClibc_main,STT_FUNC; - -/* 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 */ - -.type _main,STT_FUNC; - -_start: - -/* clear the frame pointer */ - FP = 0; -/* Load register R0 (argc) from the stack to its final resting place */ - P0 = SP; - R0 = [P0++]; - -/* Copy argv pointer into R1 -- which its final resting place */ - R1 = P0; - -/* Skip to the end of argv and put a pointer to the environment in R2 */ - R2 = R0; - R2 <<= 2; - R2 += 4; - R2 = R1+R2; - -/* Ok, now run uClibc's main() -- shouldn't return */ - sp += -12; - jump.l ___uClibc_main; - diff --git a/libc/sysdeps/linux/bfin/crt1.S b/libc/sysdeps/linux/bfin/crt1.S new file mode 100644 index 000000000..7b6a99de0 --- /dev/null +++ b/libc/sysdeps/linux/bfin/crt1.S @@ -0,0 +1,74 @@ +/* Initial C runtime code for Blackfin + * + * Copyright (C) 2004-2006 Erik Andersen + * + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +/* When we enter this piece of code, the user stack looks like this: +* argc argument counter (integer) +* argv[0] program name (pointer) +* argv[1...N] program args (pointers) +* NULL +* env[0...N] environment variables (pointers) +* NULL + +* When we are done here, we want +* R0=argc +* R1=*argv[0] +* R2=*envp[0] +*/ + +#include + +.text +.align 2 +.global __start; +.type __start,STT_FUNC; +.global ___uClibc_main; +.type ___uClibc_main,STT_FUNC; + +#if defined(__UCLIBC_CTOR_DTOR__) +.type __init,%function +.type __fini,%function +#else +.weak __init +.weak __fini +#endif + +/* + When we enter, our stack looks like: + [ SP ] + [argc][argv]... + + Call ___uClibc_main(argc, argv, __init, __fini) + R0 R1 R2 stack + + Before we call main, we want: + [ SP ] + [fini][argc][argv] +*/ + +__start: + +/* clear the frame pointer */ + FP = 0; + +/* Load register R0 (argc) from the stack to its final resting place */ + P0 = SP; + R0 = [P0++]; + +/* Copy argv pointer into R1 */ + R1 = P0; + +/* Load __init into R2 */ + R2 = __init; + +/* Load __fini onto the stack */ + P0 = __fini; + [SP--] = P0; + +/* Ok, now run uClibc's main() -- shouldn't return */ + sp += -8; + jump.l ___uClibc_main; +.size __start,.-__start -- cgit v1.2.3