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Diffstat (limited to 'libgloss/mips/crt0_cfe.S')
| -rw-r--r-- | libgloss/mips/crt0_cfe.S | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/libgloss/mips/crt0_cfe.S b/libgloss/mips/crt0_cfe.S deleted file mode 100644 index 9e920e2d5..000000000 --- a/libgloss/mips/crt0_cfe.S +++ /dev/null @@ -1,263 +0,0 @@ -/* - * crt0_cfe.S -- Runtime startup for MIPS targets running CFE. - * - * Copyright 2003 - * Broadcom Corporation. All rights reserved. - * - * This software is furnished under license and may be used and copied only - * in accordance with the following terms and conditions. Subject to these - * conditions, you may download, copy, install, use, modify and distribute - * modified or unmodified copies of this software in source and/or binary - * form. No title or ownership is transferred hereby. - * - * 1) Any source code used, modified or distributed must reproduce and - * retain this copyright notice and list of conditions as they appear in - * the source file. - * - * 2) No right is granted to use any trade name, trademark, or logo of - * Broadcom Corporation. The "Broadcom Corporation" name may not be - * used to endorse or promote products derived from this software - * without the prior written permission of Broadcom Corporation. - * - * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR - * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE - * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE - * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE - * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Derived from crt0_cygmon.S: - * - * Copyright (c) 1995, 1996, 1997, 2000 Red Hat, Inc. - * - * 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. - */ - -/* - * This file does minimal runtime startup for code running under - * CFE firmware. - * - * It does minimal hardware initialization. In particular - * it sets Status:FR to match the requested floating point - * mode. - * - * It is meant to be linked with the other files provided by libcfe.a, - * and calls routines in those files. - */ - -#ifdef __mips16 -/* This file contains 32 bit assembly code. */ - .set nomips16 -#endif -#ifdef __mips_embedded_pic -# error -membedded-pic is not supported. -#endif - -#include "regs.S" - -/* - * Set up some room for a stack. We just grab a chunk of memory. - */ -#define STARTUP_STACK_SIZE (1 * 1024) - - .comm _lstack, STARTUP_STACK_SIZE - - .text - .align 4 - - /* - * Without the following nop, GDB thinks _start is a data variable. - * This is probably a bug in GDB in handling a symbol that is at the - * start of the .text section. - */ - nop - - - /* - * On entry, the following values have been passed in registers - * by the firmware: - * - * a0: firmware handle - * a1: zero (unused) - * a2: firmware callback entrypoint - * a3: CFE entrypoint seal (unused) - * - * They must be preserved until the CFE entrypoint and handle - * are passed to __libcfe_init(). - */ - - .globl _start - .ent _start -_start: - .set noreorder - /* Set the global data pointer, defined in the linker script. */ - la gp, _gp - -#ifndef __mips_soft_float - /* If compiled for hard float, set the FPU mode based on the - compilation flags. Note that this assumes that enough code - will run after the mtc0 to clear any hazards. */ - mfc0 t0, C0_SR - or t0, t0, (SR_CU1 | SR_FR) -#if (__mips_fpr == 32) - xor t0, t0, SR_FR /* If 32-bit FP mode, clear FR. */ -#endif - mtc0 t0, C0_SR -#endif - .end _start - - /* - * zero out the bss section. - */ - .globl _zerobss - .ent _zerobss -_zerobss: - /* These variables are defined in the linker script. */ - la v0, _fbss - la v1, _end - -3: - sw zero, 0(v0) - bltu v0, v1, 3b - addiu v0, v0, 4 /* Delay slot. */ - .end _zerobss - - /* - * Setup a small stack so we can run some C code, and do - * the library initialization. (32 bytes are saved for - * the argument registers' stack slots.) - */ - .globl _stackinit - .ent _stackinit -_stackinit: - la t0, _lstack - addiu sp, t0, (STARTUP_STACK_SIZE - 32) - jal __libcfe_init - nop - - /* - * Setup the stack pointer -- - * __libcfe_init() returns the value to be used as the top of - * the program's stack. - * - * We subtract 32 bytes for the 4 argument registers, in case - * main() wants to write them back to the stack. The caller - * allocates stack space for parameters in the old MIPS ABIs. - * We must do this even though we aren't passing arguments, - * because main might be declared to have them.) - * - * We subtract 32 more bytes for the argv/envp setup for the - * call to main(). - */ - subu v0, v0, 64 - move sp, v0 - - .end _stackinit - - /* - * initialize target specific stuff. Only execute these - * functions it they exist. - */ - .globl hardware_init_hook .text - .globl software_init_hook .text - .type _fini,@function - .type _init,@function - .globl atexit .text - .globl exit .text - .globl _crt0init - .ent _crt0init -_crt0init: - la t9, hardware_init_hook # init the hardware if needed - beq t9, zero, 6f - nop - jal t9 - nop -6: - la t9, software_init_hook # init the software if needed - beq t9, zero, 7f - nop - jal t9 - nop -7: - la a0, _fini - jal atexit - nop - -#ifdef GCRT0 - .globl _ftext - .globl _extext - la a0, _ftext - la a1, _etext - jal monstartup - nop -#endif - - jal _init # run global constructors - nop - - addiu a1,sp,32 # argv = sp + 32 - addiu a2,sp,40 # envp = sp + 40 -#if __mips64 - sd zero,(a1) # argv[argc] = 0 - sd zero,(a2) # envp[0] = 0 -#else - sw zero,(a1) - sw zero,(a2) -#endif - - jal main # call the program start function - move a0,zero # set argc to 0; delay slot. - - # fall through to the "exit" routine - jal exit # call libc exit to run the G++ - # destructors - move a0, v0 # pass through the exit code - .end _crt0init - -/* - * _exit -- Exit from the application. This is provided in this file because - * program exit should shut down profiling (if GCRT0 is defined), - * and only this file is compiled with GCRT0 defined. - */ - .globl _exit - .ent _exit -_exit: -7: - move s0, a0 /* Save in case we loop. */ - -#ifdef GCRT0 - jal _mcleanup - nop -#endif - - la t0, hardware_exit_hook - beq t0,zero,1f - nop - jal t0 - nop - -1: - /* Call into the library to do the heavy lifting. */ - jal __libcfe_exit - move a0, s0 /* Delay slot. */ - - b 7b /* Loop back just in case. */ - nop - .end _exit - -/* EOF crt0_cfe.S */ |