1/* 2 * Copyright 2013, winocm. <winocm@icloud.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * Redistributions of source code must retain the above copyright notice, this 9 * list of conditions and the following disclaimer. 10 * 11 * Redistributions in binary form must reproduce the above copyright notice, this 12 * list of conditions and the following disclaimer in the documentation and/or 13 * other materials provided with the distribution. 14 * 15 * If you are going to use this software in any form that does not involve 16 * releasing the source to this project or improving it, let me know beforehand. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29/* 30 * PE semihosting bringup interface 31 */ 32 33#include <arm/arch.h> 34#include <arm/asm_help.h> 35 36#ifndef __LP64__ 37.code 16 38#endif 39 40.text 41.align 4 42 43/* 44 * lol buffer 45 */ 46.globl _semihost_buffer_ptr 47_semihost_buffer: 48 .space (8192), 0 49_semihost_buffer_ptr: 50 .long _semihost_buffer 51_semihost_buffer_ptr_ptr: 52 .long _semihost_buffer_ptr 53 54#ifdef BOARD_CONFIG_ARMPBA8 55#define SEMIHOSTING_ONLY 1 56#endif 57 58/** 59 * PE_semihost_write_char 60 * 61 * Writes character output to debugger standard out. 62 */ 63#ifndef __LP64__ 64EnterARM(PE_semihost_write_char) 65#if 0 66#ifndef SEMIHOSTING_ONLY 67 ldr r1, _semihost_buffer_ptr 68 strb r0, [r1] 69 add r1, r1, #1 70 ldr r2, _semihost_buffer_ptr_ptr 71 str r1, [r2] 72#else 73 ldr r1, _semihost_buffer 74 strb r0, [r1] 75 mov r0, #0x03 // SYS_WRITEC 76 svc 0x123456 77#endif 78#endif 79 bx lr 80#else 81.globl _PE_semihost_write_char 82.align 6 83_PE_semihost_write_char: 84 ldr x1, _semihost_buffer_ptr 85 str w0, [x1] 86 movz x0, #0x03 87 hlt #0xf000 88#endif 89