--- /dev/null
+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#include <stdio.h>
+
+#include <rtas.h>
+
+#include "biosemu.h"
+#include "mem.h"
+#include "device.h"
+#include "debug.h"
+#include "interrupt.h"
+
+#include <x86emu/x86emu.h>
+#include <x86emu/prim_ops.h>
+
+
+
+//setup to run the code at the address, that the Interrupt Vector points to...
+static void
+setupInt(int intNum)
+{
+ DEBUG_PRINTF_INTR("%s(%x): executing interrupt handler @%08x\n",
+ __FUNCTION__, intNum, my_rdl(intNum * 4));
+ // push current R_FLG... will be popped by IRET
+ push_word((u16) M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ // push current CS:IP to the stack, will be popped by IRET
+ push_word(M.x86.R_CS);
+ push_word(M.x86.R_IP);
+ // set CS:IP to the interrupt handler address... so the next executed instruction will
+ // be the interrupt handler
+ M.x86.R_CS = my_rdw(intNum * 4 + 2);
+ M.x86.R_IP = my_rdw(intNum * 4);
+}
+
+// handle int10 (VGA BIOS Interrupt)
+static void
+handleInt10(void)
+{
+ // the data for INT10 is stored in BDA (0000:0400h) offset 49h-66h
+ // function number in AH
+ //DEBUG_PRINTF_CS_IP("%s:\n", __FUNCTION__);
+ //x86emu_dump_xregs();
+ //if ((M.x86.R_IP == 0x32c2) && (M.x86.R_SI == 0x1ce2)){
+ //X86EMU_trace_on();
+ //M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+ //}
+ switch (M.x86.R_AH) {
+ case 0x00:
+ // set video mode
+ // BDA offset 49h is current video mode
+ my_wrb(0x449, M.x86.R_AL);
+ if (M.x86.R_AL > 7)
+ M.x86.R_AL = 0x20;
+ else if (M.x86.R_AL == 6)
+ M.x86.R_AL = 0x3f;
+ else
+ M.x86.R_AL = 0x30;
+ break;
+ case 0x01:
+ // set cursor shape
+ // ignore
+ break;
+ case 0x02:
+ // set cursor position
+ // BH: pagenumber, DX: cursor_pos (DH:row, DL:col)
+ // BDA offset 50h-60h are 8 cursor position words for
+ // eight possible video pages
+ my_wrw(0x450 + (M.x86.R_BH * 2), M.x86.R_DX);
+ break;
+ case 0x03:
+ //get cursor position
+ // BH: pagenumber
+ // BDA offset 50h-60h are 8 cursor position words for
+ // eight possible video pages
+ M.x86.R_AX = 0;
+ M.x86.R_CH = 0; // start scan line ???
+ M.x86.R_CL = 0; // end scan line ???
+ M.x86.R_DX = my_rdw(0x450 + (M.x86.R_BH * 2));
+ break;
+ case 0x05:
+ // set active page
+ // BDA offset 62h is current page number
+ my_wrb(0x462, M.x86.R_AL);
+ break;
+ case 0x06:
+ //scroll up windows
+ break;
+ case 0x07:
+ //scroll down windows
+ break;
+ case 0x08:
+ //read character and attribute at position
+ M.x86.R_AH = 0x07; // white-on-black
+ M.x86.R_AL = 0x20; // a space...
+ break;
+ case 0x09:
+ // write character and attribute
+ //AL: char, BH: page number, BL: attribute, CX: number of times to write
+ //BDA offset 62h is current page number
+ CHECK_DBG(DEBUG_PRINT_INT10) {
+ uint32_t i = 0;
+ if (M.x86.R_BH == my_rdb(0x462)) {
+ for (i = 0; i < M.x86.R_CX; i++)
+ printf("%c", M.x86.R_AL);
+ }
+ }
+ break;
+ case 0x0a:
+ // write character
+ //AL: char, BH: page number, BL: attribute, CX: number of times to write
+ //BDA offset 62h is current page number
+ CHECK_DBG(DEBUG_PRINT_INT10) {
+ uint32_t i = 0;
+ if (M.x86.R_BH == my_rdb(0x462)) {
+ for (i = 0; i < M.x86.R_CX; i++)
+ printf("%c", M.x86.R_AL);
+ }
+ }
+ break;
+ case 0x0e:
+ // teletype output: write character and advance cursor...
+ //AL: char, BH: page number, BL: attribute
+ //BDA offset 62h is current page number
+ CHECK_DBG(DEBUG_PRINT_INT10) {
+ // we ignore the pagenumber on this call...
+ //if (M.x86.R_BH == my_rdb(0x462))
+ {
+ printf("%c", M.x86.R_AL);
+ // for debugging, to read all lines
+ //if (M.x86.R_AL == 0xd) // carriage return
+ // printf("\n");
+ }
+ }
+ break;
+ case 0x0f:
+ // get video mode
+ // BDA offset 49h is current video mode
+ // BDA offset 62h is current page number
+ // BDA offset 4ah is columns on screen
+ M.x86.R_AH = 80; //number of character columns... we hardcode it to 80
+ M.x86.R_AL = my_rdb(0x449);
+ M.x86.R_BH = my_rdb(0x462);
+ break;
+ default:
+ printf("%s(): unknown function (%x) for int10 handler.\n",
+ __FUNCTION__, M.x86.R_AH);
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ M.x86.R_AX, M.x86.R_BX, M.x86.R_CX,
+ M.x86.R_DX);
+ HALT_SYS();
+ break;
+ }
+}
+
+// this table translates ASCII chars into their XT scan codes:
+static uint8_t keycode_table[256] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0 - 7
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 8 - 15
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 16 - 23
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 24 - 31
+ 0x39, 0x02, 0x28, 0x04, 0x05, 0x06, 0x08, 0x28, // 32 - 39
+ 0x0a, 0x0b, 0x09, 0x2b, 0x33, 0x0d, 0x34, 0x35, // 40 - 47
+ 0x0b, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, // 48 - 55
+ 0x09, 0x0a, 0x27, 0x27, 0x33, 0x2b, 0x34, 0x35, // 56 - 63
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 64 - 71
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 72 - 79
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 80 - 87
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 88 - 95
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 96 - 103
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 104 - 111
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 112 - 119
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 120 - 127
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ...
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static void
+translate_keycode(uint64_t * keycode)
+{
+ uint8_t scan_code = 0;
+ uint8_t char_code = 0;
+ if (*keycode < 256) {
+ scan_code = keycode_table[*keycode];
+ char_code = (uint8_t) * keycode & 0xff;
+ } else {
+ switch (*keycode) {
+ case 0x1b50:
+ // F1
+ scan_code = 0x3b;
+ char_code = 0x0;
+ break;
+ default:
+ printf("%s(): unknown multibyte keycode: %llx\n",
+ __FUNCTION__, *keycode);
+ break;
+ }
+ }
+ //assemble scan/char code in keycode
+ *keycode = (uint64_t) ((((uint16_t) scan_code) << 8) | char_code);
+}
+
+// handle int16 (Keyboard BIOS Interrupt)
+static void
+handleInt16(void)
+{
+ // keyboard buffer is in BIOS Memory Area:
+ // offset 0x1a (WORD) pointer to next char in keybuffer
+ // offset 0x1c (WORD) pointer to next insert slot in keybuffer
+ // offset 0x1e-0x3e: 16 WORD Ring Buffer
+ // since we currently always read the char from the FW buffer,
+ // we misuse the ring buffer, we use it as pointer to a uint64_t that stores
+ // multi-byte keys (e.g. special keys in VT100 terminal)
+ // and as long as a key is available (not 0) we dont read further keys
+ uint64_t *keycode = (uint64_t *) (M.mem_base + 0x41e);
+ int8_t c;
+ // function number in AH
+ DEBUG_PRINTF_INTR("%s(): Keyboard Interrupt: function: %x.\n",
+ __FUNCTION__, M.x86.R_AH);
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n", M.x86.R_AX,
+ M.x86.R_BX, M.x86.R_CX, M.x86.R_DX);
+ switch (M.x86.R_AH) {
+ case 0x00:
+ // get keystroke
+ if (*keycode) {
+ M.x86.R_AX = (uint16_t) * keycode;
+ // clear keycode
+ *keycode = 0;
+ } else {
+ M.x86.R_AH = 0x61; // scancode for space key
+ M.x86.R_AL = 0x20; // a space
+ }
+ break;
+ case 0x01:
+ // check keystroke
+ // ZF set = no keystroke
+ // read first byte of key code
+ if (*keycode) {
+ // already read, but not yet taken
+ CLEAR_FLAG(F_ZF);
+ M.x86.R_AX = (uint16_t) * keycode;
+ } else {
+ c = getchar();
+ if (c == -1) {
+ // no key available
+ SET_FLAG(F_ZF);
+ } else {
+ *keycode = c;
+
+ // since after an ESC it may take a while to receive the next char,
+ // we send something that is not shown on the screen, and then try to get
+ // the next char
+ // TODO: only after ESC?? what about other multibyte keys
+ printf("tt%c%c", 0x08, 0x08); // 0x08 == Backspace
+
+ while ((c = getchar()) != -1) {
+ *keycode = (*keycode << 8) | c;
+ DEBUG_PRINTF(" key read: %0llx\n",
+ *keycode);
+ }
+ translate_keycode(keycode);
+ DEBUG_PRINTF(" translated key: %0llx\n",
+ *keycode);
+ if (*keycode == 0) {
+ //not found
+ SET_FLAG(F_ZF);
+ } else {
+ CLEAR_FLAG(F_ZF);
+ M.x86.R_AX = (uint16_t) * keycode;
+ //X86EMU_trace_on();
+ //M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+ }
+ }
+ }
+ break;
+ default:
+ printf("%s(): unknown function (%x) for int16 handler.\n",
+ __FUNCTION__, M.x86.R_AH);
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ M.x86.R_AX, M.x86.R_BX, M.x86.R_CX,
+ M.x86.R_DX);
+ HALT_SYS();
+ break;
+ }
+}
+
+// handle int1a (PCI BIOS Interrupt)
+static void
+handleInt1a(void)
+{
+ // function number in AX
+ uint8_t bus, devfn, offs;
+ switch (M.x86.R_AX) {
+ case 0xb101:
+ // Installation check
+ CLEAR_FLAG(F_CF); // clear CF
+ M.x86.R_EDX = 0x20494350; // " ICP" endian swapped "PCI "
+ M.x86.R_AL = 0x1; // Config Space Mechanism 1 supported
+ M.x86.R_BX = 0x0210; // PCI Interface Level Version 2.10
+ M.x86.R_CL = 0xff; // number of last PCI Bus in system TODO: check!
+ break;
+ case 0xb102:
+ // Find PCI Device
+ // NOTE: we currently only allow the device to find itself...
+ // it SHOULD be all we ever need...
+ // device_id in CX, vendor_id in DX
+ // device index in SI (i.e. if multiple devices with same vendor/device id
+ // are connected). We currently only support device index 0
+ DEBUG_PRINTF_INTR("%s(): function: %x: PCI Find Device\n",
+ __FUNCTION__, M.x86.R_AX);
+ if ((M.x86.R_CX == bios_device.pci_device_id)
+ && (M.x86.R_DX == bios_device.pci_vendor_id)
+ // device index must be 0
+ && (M.x86.R_SI == 0)) {
+ CLEAR_FLAG(F_CF);
+ M.x86.R_AH = 0x00; // return code: success
+ M.x86.R_BH = bios_device.bus;
+ M.x86.R_BL = bios_device.devfn;
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Find Device --> 0x%04x\n",
+ __FUNCTION__, M.x86.R_AX, M.x86.R_BX);
+ } else {
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: invalid device/vendor/device index! (%04x/%04x/%02x expected: %04x/%04x/0) \n",
+ __FUNCTION__, M.x86.R_AX, M.x86.R_CX, M.x86.R_DX,
+ M.x86.R_SI, bios_device.pci_device_id,
+ bios_device.pci_vendor_id);
+ SET_FLAG(F_CF);
+ M.x86.R_AH = 0x86; // return code: device not found
+ }
+ break;
+ case 0xb108: //read configuration byte
+ case 0xb109: //read configuration word
+ case 0xb10a: //read configuration dword
+ bus = M.x86.R_BH;
+ devfn = M.x86.R_BL;
+ offs = M.x86.R_DI;
+ if ((bus != bios_device.bus)
+ || (devfn != bios_device.devfn)) {
+ // fail accesses to any device but ours...
+ printf
+ ("%s(): Config read access invalid! bus: %x (%x), devfn: %x (%x), offs: %x\n",
+ __FUNCTION__, bus, bios_device.bus, devfn,
+ bios_device.devfn, offs);
+ SET_FLAG(F_CF);
+ M.x86.R_AH = 0x87; //return code: bad pci register
+ HALT_SYS();
+ return;
+ } else {
+ switch (M.x86.R_AX) {
+ case 0xb108:
+ M.x86.R_CL =
+ (uint8_t) rtas_pci_config_read(bios_device.
+ puid, 1,
+ bus, devfn,
+ offs);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Read @%02x --> 0x%02x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_CL);
+ break;
+ case 0xb109:
+ M.x86.R_CX =
+ (uint16_t) rtas_pci_config_read(bios_device.
+ puid, 2,
+ bus, devfn,
+ offs);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Read @%02x --> 0x%04x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_CX);
+ break;
+ case 0xb10a:
+ M.x86.R_ECX =
+ (uint32_t) rtas_pci_config_read(bios_device.
+ puid, 4,
+ bus, devfn,
+ offs);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Read @%02x --> 0x%08x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_ECX);
+ break;
+ }
+ CLEAR_FLAG(F_CF);
+ M.x86.R_AH = 0x0; // return code: success
+ }
+ break;
+ case 0xb10b: //write configuration byte
+ case 0xb10c: //write configuration word
+ case 0xb10d: //write configuration dword
+ bus = M.x86.R_BH;
+ devfn = M.x86.R_BL;
+ offs = M.x86.R_DI;
+ if ((bus != bios_device.bus)
+ || (devfn != bios_device.devfn)) {
+ // fail accesses to any device but ours...
+ printf
+ ("%s(): Config read access invalid! bus: %x (%x), devfn: %x (%x), offs: %x\n",
+ __FUNCTION__, bus, bios_device.bus, devfn,
+ bios_device.devfn, offs);
+ SET_FLAG(F_CF);
+ M.x86.R_AH = 0x87; //return code: bad pci register
+ HALT_SYS();
+ return;
+ } else {
+ switch (M.x86.R_AX) {
+ case 0xb10b:
+ rtas_pci_config_write(bios_device.puid, 1, bus,
+ devfn, offs, M.x86.R_CL);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Write @%02x <-- 0x%02x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_CL);
+ break;
+ case 0xb10c:
+ rtas_pci_config_write(bios_device.puid, 2, bus,
+ devfn, offs, M.x86.R_CX);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Write @%02x <-- 0x%04x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_CX);
+ break;
+ case 0xb10d:
+ rtas_pci_config_write(bios_device.puid, 4, bus,
+ devfn, offs, M.x86.R_ECX);
+ DEBUG_PRINTF_INTR
+ ("%s(): function %x: PCI Config Write @%02x <-- 0x%08x\n",
+ __FUNCTION__, M.x86.R_AX, offs,
+ M.x86.R_ECX);
+ break;
+ }
+ CLEAR_FLAG(F_CF);
+ M.x86.R_AH = 0x0; // return code: success
+ }
+ break;
+ default:
+ printf("%s(): unknown function (%x) for int1a handler.\n",
+ __FUNCTION__, M.x86.R_AX);
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ M.x86.R_AX, M.x86.R_BX, M.x86.R_CX,
+ M.x86.R_DX);
+ HALT_SYS();
+ break;
+ }
+}
+
+// main Interrupt Handler routine, should be registered as x86emu interrupt handler
+void
+handleInterrupt(int intNum)
+{
+ uint8_t int_handled = 0;
+#ifndef DEBUG_PRINT_INT10
+ // this printf makes output by int 10 unreadable...
+ // so we only enable it, if int10 print is disabled
+ DEBUG_PRINTF_INTR("%s(%x)\n", __FUNCTION__, intNum);
+#endif
+ switch (intNum) {
+ case 0x10: //BIOS video interrupt
+ case 0x42: // INT 10h relocated by EGA/VGA BIOS
+ case 0x6d: // INT 10h relocated by VGA BIOS
+ // get interrupt vector from IDT (4 bytes per Interrupt starting at address 0
+ if ((my_rdl(intNum * 4) == 0xF000F065) || //F000:F065 is default BIOS interrupt handler address
+ (my_rdl(intNum * 4) == 0xF4F4F4F4)) //invalid
+ {
+#if 0
+ // ignore interrupt...
+ DEBUG_PRINTF_INTR
+ ("%s(%x): invalid interrupt Vector (%08x) found, interrupt ignored...\n",
+ __FUNCTION__, intNum, my_rdl(intNum * 4));
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ M.x86.R_AX, M.x86.R_BX, M.x86.R_CX,
+ M.x86.R_DX);
+ //HALT_SYS();
+#endif
+ handleInt10();
+ int_handled = 1;
+ }
+ break;
+ case 0x16:
+ // Keyboard BIOS Interrupt
+ handleInt16();
+ int_handled = 1;
+ break;
+ case 0x1a:
+ // PCI BIOS Interrupt
+ handleInt1a();
+ int_handled = 1;
+ break;
+ default:
+ printf("Interrupt %#x (Vector: %x) not implemented\n", intNum,
+ my_rdl(intNum * 4));
+ DEBUG_PRINTF_INTR("AX=%04x BX=%04x CX=%04x DX=%04x\n",
+ M.x86.R_AX, M.x86.R_BX, M.x86.R_CX,
+ M.x86.R_DX);
+ int_handled = 1;
+ HALT_SYS();
+ break;
+ }
+ // if we did not handle the interrupt, jump to the interrupt vector...
+ if (!int_handled) {
+ setupInt(intNum);
+ }
+}
+
+// prepare and execute Interrupt 10 (VGA Interrupt)
+void
+runInt10()
+{
+ // Initialize stack and data segment
+ M.x86.R_SS = STACK_SEGMENT;
+ M.x86.R_DS = DATA_SEGMENT;
+ M.x86.R_SP = STACK_START_OFFSET;
+
+ // push a HLT instruction and a pointer to it onto the stack
+ // any return will pop the pointer and jump to the HLT, thus
+ // exiting (more or less) cleanly
+ push_word(0xf4f4); //F4=HLT
+ //push_word(M.x86.R_SS);
+ //push_word(M.x86.R_SP + 2);
+
+ // setupInt will push the current CS and IP to the stack to return to it,
+ // but we want to halt, so set CS:IP to the HLT instruction we just pushed
+ // to the stack
+ M.x86.R_CS = M.x86.R_SS;
+ M.x86.R_IP = M.x86.R_SP; // + 4;
+
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ CHECK_DBG(DEBUG_JMP) {
+ M.x86.debug |= DEBUG_TRACEJMP_REGS_F;
+ M.x86.debug |= DEBUG_TRACEJMP_REGS_F;
+ M.x86.debug |= DEBUG_TRACECALL_F;
+ M.x86.debug |= DEBUG_TRACECALL_REGS_F;
+ }
+ setupInt(0x10);
+ DEBUG_PRINTF_INTR("%s(): starting execution of INT10...\n",
+ __FUNCTION__);
+ X86EMU_exec();
+ DEBUG_PRINTF_INTR("%s(): execution finished\n", __FUNCTION__);
+}
+
+// prepare and execute Interrupt 13 (Disk Interrupt)
+void
+runInt13(void)
+{
+ // Initialize stack and data segment
+ M.x86.R_SS = STACK_SEGMENT;
+ M.x86.R_DS = DATA_SEGMENT;
+ M.x86.R_SP = STACK_START_OFFSET;
+
+ // push a HLT instruction and a pointer to it onto the stack
+ // any return will pop the pointer and jump to the HLT, thus
+ // exiting (more or less) cleanly
+ push_word(0xf4f4); //F4=HLT
+ //push_word(M.x86.R_SS);
+ //push_word(M.x86.R_SP + 2);
+
+ // setupInt will push the current CS and IP to the stack to return to it,
+ // but we want to halt, so set CS:IP to the HLT instruction we just pushed
+ // to the stack
+ M.x86.R_CS = M.x86.R_SS;
+ M.x86.R_IP = M.x86.R_SP;
+
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ CHECK_DBG(DEBUG_JMP) {
+ M.x86.debug |= DEBUG_TRACEJMP_REGS_F;
+ M.x86.debug |= DEBUG_TRACEJMP_REGS_F;
+ M.x86.debug |= DEBUG_TRACECALL_F;
+ M.x86.debug |= DEBUG_TRACECALL_REGS_F;
+ }
+
+ setupInt(0x13);
+ DEBUG_PRINTF_INTR("%s(): starting execution of INT13...\n",
+ __FUNCTION__);
+ X86EMU_exec();
+ DEBUG_PRINTF_INTR("%s(): execution finished\n", __FUNCTION__);
+}
Code Review / kvmfornfv.git / blobdiff