| 1 | /* |
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| 2 | * hal_trap.c - Trap handler |
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| 3 | * |
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| 4 | * Copyright (c) 2017 Maxime Villard |
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| 5 | * |
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| 6 | * This file is part of ALMOS-MKH. |
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| 7 | * |
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| 8 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 9 | * under the terms of the GNU General Public License as published by |
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| 10 | * the Free Software Foundation; version 2.0 of the License. |
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| 11 | * |
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| 12 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU General Public License |
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| 18 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |
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| 22 | #include <hal_types.h> |
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| 23 | #include <hal_kentry.h> |
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| 24 | |
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| 25 | static const char *trap_type[] = { |
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| 26 | [T_PRIVINFLT]= "privileged instruction fault", |
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| 27 | [T_BPTFLT] = "breakpoint trap", |
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| 28 | [T_ARITHTRAP] = "arithmetic trap", |
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| 29 | [T_ASTFLT] = "asynchronous system trap", |
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| 30 | [T_PROTFLT] = "protection fault", |
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| 31 | [T_TRCTRAP] = "trace trap", |
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| 32 | [T_PAGEFLT] = "page fault", |
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| 33 | [T_ALIGNFLT] = "alignment fault", |
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| 34 | [T_DIVIDE] = "integer divide fault", |
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| 35 | [T_NMI] = "non-maskable interrupt", |
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| 36 | [T_OFLOW] = "overflow trap", |
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| 37 | [T_BOUND] = "bounds check fault", |
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| 38 | [T_DNA] = "FPU not available fault", |
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| 39 | [T_DOUBLEFLT] = "double fault", |
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| 40 | [T_FPOPFLT] = "FPU operand fetch fault", |
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| 41 | [T_TSSFLT] = "invalid TSS fault", |
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| 42 | [T_SEGNPFLT] = "segment not present fault", |
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| 43 | [T_STKFLT] = "stack fault", |
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| 44 | [T_MCA] = "machine check fault", |
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| 45 | [T_XMM] = "SSE FP exception", |
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| 46 | }; |
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| 47 | int trap_types = __arraycount(trap_type); |
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| 48 | |
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| 49 | void x86_printf(char *s, ...); |
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| 50 | |
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| 51 | /* |
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| 52 | * Trap handler. |
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| 53 | */ |
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| 54 | void |
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| 55 | hal_trap_entry(struct small_trapframe *tf) |
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| 56 | { |
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| 57 | uint64_t trapno = tf->tf_trapno; |
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| 58 | const char *buf; |
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| 59 | |
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| 60 | if (trapno < trap_types) { |
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| 61 | buf = trap_type[trapno]; |
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| 62 | } else { |
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| 63 | buf = "unknown trap"; |
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| 64 | } |
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| 65 | |
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| 66 | x86_printf("\n"); |
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| 67 | x86_printf("****** FAULT OCCURRED ******\n"); |
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| 68 | x86_printf((char *)buf); |
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| 69 | x86_printf("\n"); |
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| 70 | x86_printf("****** FAULT OCCURRED ******\n"); |
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| 71 | x86_printf("\n"); |
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| 72 | |
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| 73 | while (1); |
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| 74 | } |
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| 75 | |
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| 76 | |
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