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| version 1.21, 2008/03/22 04:03:07 | version 1.26, 2011/12/20 01:17:30 |
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| Line 1 | Line 1 |
| /* $Id$ */ | |
| /* | /* |
| * Copyright (c) 2003 NONAKA Kimihiro | * Copyright (c) 2003 NONAKA Kimihiro |
| * All rights reserved. | * All rights reserved. |
| Line 94 exception(int num, int error_code) | Line 92 exception(int num, int error_code) |
| case NM_EXCEPTION: /* (F) デバイス使用不可 (FPU が無い) */ | case NM_EXCEPTION: /* (F) デバイス使用不可 (FPU が無い) */ |
| case MF_EXCEPTION: /* (F) 浮動小数点エラー */ | case MF_EXCEPTION: /* (F) 浮動小数点エラー */ |
| CPU_EIP = CPU_PREV_EIP; | CPU_EIP = CPU_PREV_EIP; |
| if (CPU_STATSAVE.cpu_stat.backout_sp) | |
| CPU_ESP = CPU_PREV_ESP; | |
| /*FALLTHROUGH*/ | /*FALLTHROUGH*/ |
| case NMI_EXCEPTION: /* (I) NMI 割り込み */ | case NMI_EXCEPTION: /* (I) NMI 割り込み */ |
| case BP_EXCEPTION: /* (T) ブレークポイント */ | case BP_EXCEPTION: /* (T) ブレークポイント */ |
| Line 115 exception(int num, int error_code) | Line 115 exception(int num, int error_code) |
| case GP_EXCEPTION: /* (F) 一般保護例外 (errcode) */ | case GP_EXCEPTION: /* (F) 一般保護例外 (errcode) */ |
| case PF_EXCEPTION: /* (F) ページフォルト (errcode) */ | case PF_EXCEPTION: /* (F) ページフォルト (errcode) */ |
| CPU_EIP = CPU_PREV_EIP; | CPU_EIP = CPU_PREV_EIP; |
| if (CPU_STATSAVE.cpu_stat.backout_sp) | |
| CPU_ESP = CPU_PREV_ESP; | |
| errorp = 1; | errorp = 1; |
| break; | break; |
| Line 123 exception(int num, int error_code) | Line 125 exception(int num, int error_code) |
| break; | break; |
| } | } |
| if (CPU_STATSAVE.cpu_stat.backout_sp) { | |
| VERBOSE(("exception: restore stack pointer.")); | |
| CPU_ESP = CPU_PREV_ESP; | |
| } | |
| CPU_STATSAVE.cpu_stat.backout_sp = 0; | |
| if (CPU_STAT_EXCEPTION_COUNTER >= 2) { | if (CPU_STAT_EXCEPTION_COUNTER >= 2) { |
| if (dftable[exctype[CPU_STAT_PREV_EXCEPTION]][exctype[num]]) { | if (dftable[exctype[CPU_STAT_PREV_EXCEPTION]][exctype[num]]) { |
| num = DF_EXCEPTION; | num = DF_EXCEPTION; |
| Line 140 exception(int num, int error_code) | Line 136 exception(int num, int error_code) |
| VERBOSE(("exception: ---------------------------------------------------------------- end")); | VERBOSE(("exception: ---------------------------------------------------------------- end")); |
| interrupt(num, 0, errorp, error_code); | interrupt(num, INTR_TYPE_EXTINTR, errorp, error_code); |
| #if defined(IA32_SUPPORT_DEBUG_REGISTER) | #if defined(IA32_SUPPORT_DEBUG_REGISTER) |
| if (num != BP_EXCEPTION) { | if (num != BP_EXCEPTION) { |
| if (CPU_INST_OP32) { | if (CPU_INST_OP32) { |
| Line 222 interrupt(int num, int intrtype, int err | Line 218 interrupt(int num, int intrtype, int err |
| VERBOSE(("interrupt: num = 0x%02x, intrtype = %s, errorp = %s, error_code = %08x", num, intrtype ? "on" : "off", errorp ? "on" : "off", error_code)); | VERBOSE(("interrupt: num = 0x%02x, intrtype = %s, errorp = %s, error_code = %08x", num, intrtype ? "on" : "off", errorp ? "on" : "off", error_code)); |
| CPU_SET_PREV_ESP(); | |
| if (!CPU_STAT_PM) { | if (!CPU_STAT_PM) { |
| /* real mode */ | /* real mode */ |
| CPU_WORKCLOCK(20); | CPU_WORKCLOCK(20); |
| Line 233 interrupt(int num, int intrtype, int err | Line 231 interrupt(int num, int intrtype, int err |
| } | } |
| if ((intrtype == INTR_TYPE_EXTINTR) && CPU_STAT_HLT) { | if ((intrtype == INTR_TYPE_EXTINTR) && CPU_STAT_HLT) { |
| VERBOSE(("interrupt: reset HTL in real mode")); | |
| CPU_EIP++; | CPU_EIP++; |
| CPU_STAT_HLT = 0; | CPU_STAT_HLT = 0; |
| } | } |
| Line 258 interrupt(int num, int intrtype, int err | Line 257 interrupt(int num, int intrtype, int err |
| #if defined(DEBUG) | #if defined(DEBUG) |
| if (num == 0x80) { | if (num == 0x80) { |
| /* Linux, FreeBSD, NetBSD, OpenBSD system call */ | /* Linux, FreeBSD, NetBSD, OpenBSD system call */ |
| VERBOSE(("interrupt: syscall no = %d\n%s", CPU_EAX, cpu_reg2str())); | VERBOSE(("interrupt: syscall# = %d\n%s", CPU_EAX, cpu_reg2str())); |
| } | } |
| #endif | #endif |
| Line 279 interrupt(int num, int intrtype, int err | Line 278 interrupt(int num, int intrtype, int err |
| VERBOSE(("interrupt: gate descripter is invalid.")); | VERBOSE(("interrupt: gate descripter is invalid.")); |
| EXCEPTION(GP_EXCEPTION, exc_errcode); | EXCEPTION(GP_EXCEPTION, exc_errcode); |
| } | } |
| if (!SEG_IS_PRESENT(&gsd)) { | |
| VERBOSE(("interrupt: gate descriptor is not present.")); | |
| EXCEPTION(GP_EXCEPTION, exc_errcode); | |
| } | |
| if (!SEG_IS_SYSTEM(&gsd)) { | if (!SEG_IS_SYSTEM(&gsd)) { |
| VERBOSE(("interrupt: gate descriptor is not system segment.")); | VERBOSE(("interrupt: gate descriptor is not system segment.")); |
| EXCEPTION(GP_EXCEPTION, exc_errcode); | EXCEPTION(GP_EXCEPTION, exc_errcode); |
| Line 302 interrupt(int num, int intrtype, int err | Line 297 interrupt(int num, int intrtype, int err |
| break; | break; |
| } | } |
| if (gsd.dpl < CPU_STAT_CPL) { | |
| VERBOSE(("interrupt: gate DPL(%d) < CPL(%d)", gsd.dpl, CPU_STAT_CPL)); | |
| EXCEPTION(GP_EXCEPTION, exc_errcode); | |
| } | |
| /* 5.10.1.1. 例外/割り込みハンドラ・プロシージャの保護 */ | /* 5.10.1.1. 例外/割り込みハンドラ・プロシージャの保護 */ |
| if ((intrtype != INTR_TYPE_EXTINTR) && (gsd.dpl < CPU_STAT_CPL)) { | if ((intrtype != INTR_TYPE_EXTINTR) && (gsd.dpl < CPU_STAT_CPL)) { |
| VERBOSE(("interrupt: intrtype && DPL(%d) < CPL(%d)", gsd.dpl, CPU_STAT_CPL)); | VERBOSE(("interrupt: intrtype(%d) && DPL(%d) < CPL(%d)", intrtype, gsd.dpl, CPU_STAT_CPL)); |
| EXCEPTION(GP_EXCEPTION, exc_errcode); | EXCEPTION(GP_EXCEPTION, exc_errcode); |
| } | } |
| if (!intrtype && CPU_STAT_HLT) { | if (!SEG_IS_PRESENT(&gsd)) { |
| VERBOSE(("interrupt: gate descriptor is not present.")); | |
| EXCEPTION(NP_EXCEPTION, exc_errcode); | |
| } | |
| if ((intrtype == INTR_TYPE_EXTINTR) && CPU_STAT_HLT) { | |
| VERBOSE(("interrupt: reset HTL in protected mode")); | |
| CPU_EIP++; | CPU_EIP++; |
| CPU_STAT_HLT = 0; | CPU_STAT_HLT = 0; |
| } | } |
| Line 337 interrupt(int num, int intrtype, int err | Line 333 interrupt(int num, int intrtype, int err |
| VERBOSE(("interrupt: ---------------------------------------------------------------- end")); | VERBOSE(("interrupt: ---------------------------------------------------------------- end")); |
| } | } |
| CPU_CLEAR_PREV_ESP(); | |
| } | } |
| static void | static void |
| Line 347 interrupt_task_gate(const descriptor_t * | Line 345 interrupt_task_gate(const descriptor_t * |
| VERBOSE(("interrupt: TASK-GATE")); | VERBOSE(("interrupt: TASK-GATE")); |
| (void)intrtype; | |
| rv = parse_selector(&task_sel, gsdp->u.gate.selector); | rv = parse_selector(&task_sel, gsdp->u.gate.selector); |
| if (rv < 0 || task_sel.ldt || !SEG_IS_SYSTEM(&task_sel.desc)) { | if (rv < 0 || task_sel.ldt || !SEG_IS_SYSTEM(&task_sel.desc)) { |
| VERBOSE(("interrupt: parse_selector (selector = %04x, rv = %d, %cDT, type = %s)", gsdp->u.gate.selector, rv, task_sel.ldt ? 'L' : 'G', task_sel.desc.s ? "code/data" : "system")); | VERBOSE(("interrupt: parse_selector (selector = %04x, rv = %d, %cDT, type = %s)", gsdp->u.gate.selector, rv, task_sel.ldt ? 'L' : 'G', task_sel.desc.s ? "code/data" : "system")); |
| Line 379 interrupt_task_gate(const descriptor_t * | Line 375 interrupt_task_gate(const descriptor_t * |
| task_switch(&task_sel, TASK_SWITCH_INTR); | task_switch(&task_sel, TASK_SWITCH_INTR); |
| CPU_SET_PREV_ESP(); | |
| if (errorp) { | if (errorp) { |
| XPUSH0(error_code); | XPUSH0(error_code); |
| } | } |