| version 1.23, 2011/01/15 18:36:12 | version 1.28, 2011/12/21 16:25:52 | 
| Line 92  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 113  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 121  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 138  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 220  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 231  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 256  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 277  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 300  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 335  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 375  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); | 
 | } | } | 
 |  |  | 
 |  | /* out of range */ | 
 |  | if (CPU_EIP > CPU_STAT_CS_LIMIT) { | 
 |  | VERBOSE(("interrupt: new_ip is out of range. new_ip = %08x, limit = %08x", CPU_EIP, CPU_STAT_CS_LIMIT)); | 
 |  | EXCEPTION(GP_EXCEPTION, 0); | 
 |  | } | 
 | } | } | 
 |  |  | 
 | static void | static void | 
| Line 422  interrupt_intr_or_trap(const descriptor_ | Line 430  interrupt_intr_or_trap(const descriptor_ | 
 | break; | break; | 
 | } | } | 
 |  |  | 
| exc_errcode = cs_sel.idx; | exc_errcode = gsdp->u.gate.selector & ~3; | 
 | if (intrtype == INTR_TYPE_EXTINTR) | if (intrtype == INTR_TYPE_EXTINTR) | 
 | exc_errcode++; | exc_errcode++; | 
 |  |  |