[25] | 1 | /* |
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[142] | 2 | * hal_exception.c - Implementation of exception handler for x86_64 |
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[25] | 3 | * |
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[142] | 4 | * Copyright (c) 2017 Maxime Villard |
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[25] | 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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[234] | 18 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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[25] | 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_irqmask.h> |
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| 24 | #include <hal_exception.h> |
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| 25 | #include <thread.h> |
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| 26 | #include <errno.h> |
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| 27 | #include <core.h> |
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| 28 | #include <do_exception.h> |
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| 29 | |
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[142] | 30 | #include <hal_kentry.h> |
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[48] | 31 | #include <hal_internal.h> |
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[276] | 32 | #include <hal_segmentation.h> |
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[48] | 33 | |
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[142] | 34 | static const char *exc_type[] = { |
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| 35 | [T_PRIVINFLT]= "privileged instruction fault", |
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| 36 | [T_BPTFLT] = "breakpoint trap", |
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| 37 | [T_ARITHTRAP] = "arithmetic trap", |
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| 38 | [T_ASTFLT] = "asynchronous system trap", |
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| 39 | [T_PROTFLT] = "protection fault", |
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| 40 | [T_TRCTRAP] = "trace trap", |
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| 41 | [T_PAGEFLT] = "page fault", |
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| 42 | [T_ALIGNFLT] = "alignment fault", |
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| 43 | [T_DIVIDE] = "integer divide fault", |
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| 44 | [T_NMI] = "non-maskable interrupt", |
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| 45 | [T_OFLOW] = "overflow trap", |
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| 46 | [T_BOUND] = "bounds check fault", |
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| 47 | [T_DNA] = "FPU not available fault", |
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| 48 | [T_DOUBLEFLT] = "double fault", |
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| 49 | [T_FPOPFLT] = "FPU operand fetch fault", |
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| 50 | [T_TSSFLT] = "invalid TSS fault", |
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| 51 | [T_SEGNPFLT] = "segment not present fault", |
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| 52 | [T_STKFLT] = "stack fault", |
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| 53 | [T_MCA] = "machine check fault", |
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| 54 | [T_XMM] = "SSE FP exception", |
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| 55 | }; |
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| 56 | int exc_types = __arraycount(exc_type); |
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| 57 | |
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[371] | 58 | static void hal_exception_kern(hal_trapframe_t *tf) |
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[142] | 59 | { |
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[371] | 60 | uint64_t trapno = tf->tf_trapno; |
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[142] | 61 | const char *buf; |
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| 62 | |
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[371] | 63 | if (trapno < exc_types) { |
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| 64 | buf = exc_type[trapno]; |
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[142] | 65 | } else { |
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| 66 | buf = "unknown exception"; |
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| 67 | } |
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| 68 | |
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[242] | 69 | x86_lock(); |
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[371] | 70 | x86_printf("\n****** EXCEPTION OCCURRED IN KERNEL MODE ******\n"); |
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[142] | 71 | x86_printf("%s\n", (char *)buf); |
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[371] | 72 | x86_printf("-> rip = %Z\n", tf->tf_rip); |
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| 73 | x86_printf("-> rdi = %Z\n", tf->tf_rdi); |
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| 74 | x86_printf("-> rbp = %Z\n", tf->tf_rbp); |
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[336] | 75 | x86_printf("-> tls = %Z (gid=%Z)\n", (uint64_t)curtls(), |
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[276] | 76 | (uint64_t)hal_get_gid()); |
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[371] | 77 | x86_printf("-> err = %Z\n", tf->tf_err); |
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| 78 | if (trapno == T_PAGEFLT) |
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[142] | 79 | x86_printf("-> va = %Z\n", rcr2()); |
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[371] | 80 | x86_printf("\n***********************************************\n"); |
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[242] | 81 | x86_unlock(); |
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[142] | 82 | |
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| 83 | while (1); |
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| 84 | } |
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| 85 | |
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[371] | 86 | static void hal_exception_user(hal_trapframe_t *tf) |
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| 87 | { |
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| 88 | switch (tf->tf_trapno) { |
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| 89 | case T_PAGEFLT: |
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| 90 | // TODO |
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| 91 | //do_exception(curtls()->tls_thr, true); |
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| 92 | |
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| 93 | default: |
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| 94 | x86_panic("userland not yet handled"); |
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| 95 | } |
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| 96 | } |
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| 97 | |
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| 98 | /* |
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| 99 | * Exception handler. |
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| 100 | */ |
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| 101 | void hal_exception_entry(hal_trapframe_t *tf) |
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| 102 | { |
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| 103 | if ((tf->tf_cs & SEL_RPL) == SEL_UPL) |
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| 104 | hal_exception_user(tf); |
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| 105 | else |
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| 106 | hal_exception_kern(tf); |
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| 107 | } |
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| 108 | |
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[142] | 109 | /* -------------------------------------------------------------------------- */ |
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| 110 | |
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| 111 | void hal_do_exception( thread_t * this, |
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[25] | 112 | reg_t * regs_tbl ) |
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| 113 | { |
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[48] | 114 | x86_panic((char *)__func__); |
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[25] | 115 | } |
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| 116 | |
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| 117 | void hal_exception_dump( thread_t * this, |
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| 118 | reg_t * regs_tbl ) |
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| 119 | { |
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[48] | 120 | x86_panic((char *)__func__); |
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[25] | 121 | } |
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| 122 | |
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