filename | src/dcload.c |
changeset | 183:5938ecc01dc8 |
prev | 182:e3b513538548 |
next | 209:ff67a7b9aa17 |
author | nkeynes |
date | Sat Aug 05 00:18:21 2006 +0000 (17 years ago) |
permissions | -rw-r--r-- |
last change | Add error lines to tests with incomplete polys Split clip tests to separate data file Add tests for cmd bit 23 ("use list size field") |
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nkeynes@102 | 1 | /** |
nkeynes@183 | 2 | * $Id: dcload.c,v 1.5 2006-07-06 22:44:39 nkeynes Exp $ |
nkeynes@102 | 3 | * |
nkeynes@102 | 4 | * DC-load syscall implementation. |
nkeynes@102 | 5 | * |
nkeynes@102 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@102 | 7 | * |
nkeynes@102 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@102 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@102 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@102 | 11 | * (at your option) any later version. |
nkeynes@102 | 12 | * |
nkeynes@102 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@102 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@102 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@102 | 16 | * GNU General Public License for more details. |
nkeynes@102 | 17 | */ |
nkeynes@102 | 18 | |
nkeynes@102 | 19 | #include <stdio.h> |
nkeynes@102 | 20 | #include "dream.h" |
nkeynes@182 | 21 | #include "dreamcast.h" |
nkeynes@102 | 22 | #include "mem.h" |
nkeynes@102 | 23 | #include "syscall.h" |
nkeynes@102 | 24 | #include "sh4/sh4core.h" |
nkeynes@102 | 25 | |
nkeynes@102 | 26 | #define SYS_READ 0 |
nkeynes@102 | 27 | #define SYS_WRITE 1 |
nkeynes@102 | 28 | #define SYS_OPEN 2 |
nkeynes@102 | 29 | #define SYS_CLOSE 3 |
nkeynes@102 | 30 | #define SYS_CREAT 4 |
nkeynes@102 | 31 | #define SYS_LINK 5 |
nkeynes@102 | 32 | #define SYS_UNLINK 6 |
nkeynes@102 | 33 | #define SYS_CHDIR 7 |
nkeynes@102 | 34 | #define SYS_CHMOD 8 |
nkeynes@102 | 35 | #define SYS_LSEEK 9 |
nkeynes@102 | 36 | #define SYS_FSTAT 10 |
nkeynes@102 | 37 | #define SYS_TIME 11 |
nkeynes@102 | 38 | #define SYS_STAT 12 |
nkeynes@102 | 39 | #define SYS_UTIME 13 |
nkeynes@102 | 40 | #define SYS_ASSIGNWRKMEM 14 |
nkeynes@102 | 41 | #define SYS_EXIT 15 |
nkeynes@102 | 42 | #define SYS_OPENDIR 16 |
nkeynes@102 | 43 | #define SYS_CLOSEDIR 17 |
nkeynes@102 | 44 | #define SYS_READDIR 18 |
nkeynes@102 | 45 | #define SYS_GETHOSTINFO 19 |
nkeynes@102 | 46 | |
nkeynes@102 | 47 | #define SYS_MAGIC 0xDEADBEEF |
nkeynes@102 | 48 | #define SYS_MAGIC_ADDR 0x8c004004 |
nkeynes@102 | 49 | #define SYSCALL_ADDR 0x8c004008 |
nkeynes@102 | 50 | |
nkeynes@182 | 51 | static gboolean dcload_allow_exit = FALSE; |
nkeynes@182 | 52 | |
nkeynes@182 | 53 | void dcload_set_allow_exit( gboolean allow ) |
nkeynes@182 | 54 | { |
nkeynes@182 | 55 | dcload_allow_exit = allow; |
nkeynes@182 | 56 | } |
nkeynes@182 | 57 | |
nkeynes@102 | 58 | void dcload_syscall( uint32_t syscall_id ) |
nkeynes@102 | 59 | { |
nkeynes@102 | 60 | uint32_t syscall = sh4r.r[4]; |
nkeynes@102 | 61 | switch( sh4r.r[4] ) { |
nkeynes@102 | 62 | case SYS_READ: |
nkeynes@102 | 63 | if( sh4r.r[5] == 0 ) { |
nkeynes@102 | 64 | char *buf = mem_get_region( sh4r.r[6] ); |
nkeynes@102 | 65 | int length = sh4r.r[7]; |
nkeynes@102 | 66 | sh4r.r[0] = read( 0, buf, length ); |
nkeynes@102 | 67 | } else { |
nkeynes@102 | 68 | sh4r.r[0] = -1; |
nkeynes@102 | 69 | } |
nkeynes@102 | 70 | break; |
nkeynes@102 | 71 | case SYS_WRITE: |
nkeynes@102 | 72 | if( sh4r.r[5] == 1 || sh4r.r[5] == 2 ) { |
nkeynes@102 | 73 | char *buf = mem_get_region( sh4r.r[6] ); |
nkeynes@102 | 74 | int length = sh4r.r[7]; |
nkeynes@102 | 75 | sh4r.r[0] = write( sh4r.r[5], buf, length ); |
nkeynes@102 | 76 | } else { |
nkeynes@102 | 77 | sh4r.r[0] = -1; |
nkeynes@102 | 78 | } |
nkeynes@102 | 79 | break; |
nkeynes@102 | 80 | case SYS_EXIT: |
nkeynes@182 | 81 | if( dcload_allow_exit ) |
nkeynes@183 | 82 | exit( sh4r.r[5] ); |
nkeynes@182 | 83 | else |
nkeynes@182 | 84 | dreamcast_stop(); |
nkeynes@102 | 85 | default: |
nkeynes@102 | 86 | sh4r.r[0] = -1; |
nkeynes@102 | 87 | } |
nkeynes@102 | 88 | |
nkeynes@102 | 89 | } |
nkeynes@102 | 90 | |
nkeynes@102 | 91 | void dcload_install() |
nkeynes@102 | 92 | { |
nkeynes@102 | 93 | syscall_add_hook_vector( 0xF0, SYSCALL_ADDR, dcload_syscall ); |
nkeynes@102 | 94 | sh4_write_long( SYS_MAGIC_ADDR, SYS_MAGIC ); |
nkeynes@102 | 95 | } |
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