summaryrefslogtreecommitdiff
path: root/hw/kdrive/vesa/vm86.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/kdrive/vesa/vm86.c')
-rw-r--r--hw/kdrive/vesa/vm86.c697
1 files changed, 697 insertions, 0 deletions
diff --git a/hw/kdrive/vesa/vm86.c b/hw/kdrive/vesa/vm86.c
new file mode 100644
index 000000000..4bb90daf2
--- /dev/null
+++ b/hw/kdrive/vesa/vm86.c
@@ -0,0 +1,697 @@
+/*
+ * $XFree86$
+ *
+ * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+/*
+Copyright (c) 2000 by Juliusz Chroboczek
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "vm86.h"
+
+#define PUSHW(vi, i) \
+{ vi->vms.regs.esp -= 2;\
+ LMW(vi,MAKE_POINTER(vi->vms.regs.ss, vi->vms.regs.esp)) = i;}
+
+static int vm86old(struct vm86_struct *vms);
+static int vm86_loop(Vm86InfoPtr vi);
+
+static const U8 rev_ints[32] =
+{ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0x80,
+};
+
+static const U8 retcode_data[2] =
+{ 0xCD, 0xFF };
+
+Vm86InfoPtr
+Vm86Setup(void)
+{
+ int devmem = -1, devzero = -1;
+ void *magicMem, *loMem, *hiMem;
+ U32 stack_base, ret_code;
+ Vm86InfoPtr vi = NULL;
+
+ devmem = open("/dev/mem", O_RDWR);
+ if(devmem < 0) {
+ perror("open /dev/mem");
+ goto fail;
+ }
+
+ devzero = open("/dev/zero", O_RDWR);
+ if(devmem < 0) {
+ perror("open /dev/zero");
+ goto fail;
+ }
+
+
+ magicMem = mmap((void*)MAGICMEM_BASE, MAGICMEM_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_PRIVATE | MAP_FIXED, devmem, MAGICMEM_BASE);
+
+ if(magicMem == MAP_FAILED) {
+ ErrorF("Couldn't map magic memory\n");
+ goto fail;
+ }
+
+ loMem = mmap((void*)LOMEM_BASE, LOMEM_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_PRIVATE | MAP_FIXED, devzero, LOMEM_BASE);
+ if(loMem == MAP_FAILED) {
+ ErrorF("Couldn't map low memory\n");
+ munmap(magicMem, MAGICMEM_SIZE);
+ goto fail;
+ }
+
+ hiMem = mmap((void*)HIMEM_BASE, HIMEM_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_SHARED | MAP_FIXED,
+ devmem, HIMEM_BASE);
+ if(hiMem == MAP_FAILED) {
+ ErrorF("Couldn't map high memory\n");
+ munmap(magicMem, MAGICMEM_SIZE);
+ munmap(loMem, LOMEM_SIZE);
+ goto fail;
+ }
+
+ vi = xalloc(sizeof(Vm86InfoRec));
+ if (!vi)
+ goto unmapfail;
+
+ vi->magicMem = magicMem;
+ vi->loMem = loMem;
+ vi->hiMem = hiMem;
+ vi->brk = LOMEM_BASE;
+
+ stack_base = Vm86AllocateMemory(vi, STACK_SIZE);
+ if(stack_base == ALLOC_FAIL)
+ goto unmapfail;
+ ret_code = Vm86AllocateMemory(vi, sizeof(retcode_data));
+ if(ret_code == ALLOC_FAIL)
+ goto unmapfail;
+
+ vi->stack_base = stack_base;
+ vi->ret_code = ret_code;
+
+ memset(&vi->vms, 0, sizeof(struct vm86_struct));
+ vi->vms.flags = 0;
+ vi->vms.screen_bitmap = 0;
+ vi->vms.cpu_type = CPU_586;
+ memcpy(&vi->vms.int_revectored, rev_ints, sizeof(rev_ints));
+
+ iopl(3);
+
+ if(devmem >= 0)
+ close(devmem);
+ if(devzero >= 0)
+ close(devzero);
+
+ return vi;
+
+unmapfail:
+ munmap(magicMem, MAGICMEM_SIZE);
+ munmap(loMem, LOMEM_SIZE);
+ munmap(hiMem, HIMEM_SIZE);
+fail:
+ if(devmem >= 0)
+ close(devmem);
+ if(devzero >= 0)
+ close(devzero);
+ if(vi)
+ xfree(vi);
+ return NULL;
+}
+
+void
+Vm86Cleanup(Vm86InfoPtr vi)
+{
+ munmap(vi->magicMem, MAGICMEM_SIZE);
+ munmap(vi->loMem, LOMEM_SIZE);
+ munmap(vi->hiMem, HIMEM_SIZE);
+ xfree(vi);
+}
+
+int
+Vm86DoInterrupt(Vm86InfoPtr vi, int num)
+{
+ U16 seg, off;
+ int code;
+
+ if(num < 0 || num>256) {
+ ErrorF("Interrupt %d doesn't exist\n");
+ return -1;
+ }
+ seg = MMW(vi,num * 4 + 2);
+ off = MMW(vi,num * 4);
+ if(MAKE_POINTER(seg, off) < ROM_BASE ||
+ MAKE_POINTER(seg, off) >= ROM_BASE + ROM_SIZE) {
+ ErrorF("Interrupt pointer doesn't point at ROM\n");
+ return -1;
+ }
+ memcpy(&(LM(vi,vi->ret_code)), retcode_data, sizeof(retcode_data));
+ vi->vms.regs.eflags = IF_MASK | IOPL_MASK;
+ vi->vms.regs.ss = POINTER_SEGMENT(vi->stack_base);
+ vi->vms.regs.esp = STACK_SIZE;
+ PUSHW(vi, IF_MASK | IOPL_MASK);
+ PUSHW(vi, POINTER_SEGMENT(vi->ret_code));
+ PUSHW(vi, POINTER_OFFSET(vi->ret_code));
+ vi->vms.regs.cs = seg;
+ vi->vms.regs.eip = off;
+ OsBlockSignals ();
+ code = vm86_loop(vi);
+ OsReleaseSignals ();
+ if(code < 0) {
+ perror("vm86 failed");
+ return -1;
+ } else if(code != 0) {
+ ErrorF("vm86 returned 0x%04X\n", code);
+ return -1;
+ } else
+ return 0;
+}
+
+#define DEBUG_VBE 0
+#if DEBUG_VBE
+#define DBG(x) ErrorF x; usleep(10*1000)
+#else
+#define DBG(x)
+#endif
+
+static inline U8
+vm86_inb(U16 port)
+{
+ U8 value;
+
+ if (port != 0x3da)
+ {
+ DBG(("inb 0x%04x", port));
+ }
+ asm volatile ("inb %w1,%b0" : "=a" (value) : "d" (port));
+ if (port != 0x3da)
+ {
+ DBG((" = 0x%02x\n", value));
+ }
+ return value;
+}
+
+static inline U16
+vm86_inw(U16 port)
+{
+ U16 value;
+ DBG(("inw 0x%04x", port));
+ asm volatile ("inw %w1,%w0" : "=a" (value) : "d" (port));
+ DBG((" = 0x%04x\n", value));
+ return value;
+}
+
+static inline U32
+vm86_inl(U16 port)
+{
+ U32 value;
+ DBG(("inl 0x%04x", port));
+ asm volatile ("inl %w1,%0" : "=a" (value) : "d" (port));
+ DBG((" = 0x%08x\n", value));
+ return value;
+}
+
+static inline void
+vm86_outb(U16 port, U8 value)
+{
+#if 0
+ static U8 CR;
+
+ if (port == 0x3d4)
+ CR = value;
+ if (port == 0x3d5 && CR == 0xa4)
+ {
+ DBG(("outb 0x%04x = 0x%02x (skipped)\n", port, value));
+ return;
+ }
+#endif
+ DBG(("outb 0x%04x = 0x%02x\n", port, value));
+ asm volatile ("outb %b0,%w1" : : "a" (value), "d" (port));
+}
+
+static inline void
+vm86_outw(U16 port, U16 value)
+{
+ DBG(("outw 0x%04x = 0x%04x\n", port, value));
+ asm volatile ("outw %w0,%w1" : : "a" (value), "d" (port));
+}
+
+static inline void
+vm86_outl(U16 port, U32 value)
+{
+ DBG(("outl 0x%04x = 0x%08x\n", port, value));
+ asm volatile ("outl %0,%w1" : : "a" (value), "d" (port));
+}
+
+#define SEG_CS 1
+#define SEG_DS 2
+#define SEG_ES 3
+#define SEG_SS 4
+#define SEG_GS 5
+#define SEG_FS 6
+#define REP 1
+#define REPNZ 2
+#define SET_8(_x, _y) (_x) = (_x & ~0xFF) | (_y & 0xFF);
+#define SET_16(_x, _y) (_x) = (_x & ~0xFFFF) | (_y & 0xFFFF);
+#define INC_IP(_i) SET_16(regs->eip, (regs->eip + _i))
+#define AGAIN INC_IP(1); goto again;
+
+static int
+vm86_emulate(Vm86InfoPtr vi)
+{
+ struct vm86_regs *regs = &vi->vms.regs;
+ U8 opcode;
+ int size;
+ int pref_seg = 0, pref_rep = 0, pref_66 = 0, pref_67 = 0;
+ U32 count;
+ int code;
+
+ again:
+ if(!Vm86IsMemory(vi, MAKE_POINTER(regs->cs, regs->eip))) {
+ ErrorF("Trying to execute unmapped memory\n");
+ return -1;
+ }
+ opcode = Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip));
+ switch(opcode) {
+ case 0x2E: pref_seg = SEG_CS; AGAIN;
+ case 0x3E: pref_seg = SEG_DS; AGAIN;
+ case 0x26: pref_seg = SEG_ES; AGAIN;
+ case 0x36: pref_seg = SEG_SS; AGAIN;
+ case 0x65: pref_seg = SEG_GS; AGAIN;
+ case 0x64: pref_seg = SEG_FS; AGAIN;
+ case 0x66: pref_66 = 1; AGAIN;
+ case 0x67: pref_67 = 1; AGAIN;
+ case 0xF2: pref_rep = REPNZ; AGAIN;
+ case 0xF3: pref_rep = REP; AGAIN;
+
+ case 0xEC: /* IN AL, DX */
+ SET_8(regs->eax, vm86_inb(regs->edx & 0xFFFF));
+ INC_IP(1);
+ break;
+ case 0xED: /* IN AX, DX */
+ if(pref_66)
+ regs->eax = vm86_inl(regs->edx & 0xFFFF);
+ else
+ SET_16(regs->eax, vm86_inw(regs->edx & 0xFFFF));
+ INC_IP(1);
+ break;
+ case 0xE4: /* IN AL, imm8 */
+ SET_8(regs->eax,
+ vm86_inb(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1))));
+ INC_IP(2);
+ break;
+ case 0xE5: /* IN AX, imm8 */
+ if(pref_66)
+ regs->eax =
+ vm86_inl(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)));
+ else
+ SET_16(regs->eax,
+ vm86_inw(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1))));
+ INC_IP(2);
+ break;
+ case 0x6C: /* INSB */
+ case 0x6D: /* INSW */
+ if(opcode == 0x6C) {
+ Vm86WriteMemory(vi, MAKE_POINTER(regs->es, regs->edi),
+ vm86_inb(regs->edx & 0xFFFF));
+ size = 1;
+ } else if(pref_66) {
+ Vm86WriteMemoryL(vi, MAKE_POINTER(regs->es, regs->edi),
+ vm86_inl(regs->edx & 0xFFFF));
+ size = 4;
+ } else {
+ Vm86WriteMemoryW(vi, MAKE_POINTER(regs->es, regs->edi),
+ vm86_inw(regs->edx & 0xFFFF));
+ size = 2;
+ }
+ if(regs->eflags & (1<<10))
+ regs->edi -= size;
+ else
+ regs->edi += size;
+ if(pref_rep) {
+ if(pref_66) {
+ regs->ecx--;
+ if(regs->ecx != 0) {
+ goto again;
+ } else {
+ SET_16(regs->ecx, regs->ecx - 1);
+ if(regs->ecx & 0xFFFF != 0)
+ goto again;
+ }
+ }
+ }
+ INC_IP(1);
+ break;
+
+ case 0xEE: /* OUT DX, AL */
+ vm86_outb(regs->edx & 0xFFFF, regs->eax & 0xFF);
+ INC_IP(1);
+ break;
+ case 0xEF: /* OUT DX, AX */
+ if(pref_66)
+ vm86_outl(regs->edx & 0xFFFF, regs->eax);
+ else
+ vm86_outw(regs->edx & 0xFFFF, regs->eax & 0xFFFF);
+ INC_IP(1);
+ break;
+ case 0xE6: /* OUT imm8, AL */
+ vm86_outb(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
+ regs->eax & 0xFF);
+ INC_IP(2);
+ break;
+ case 0xE7: /* OUT imm8, AX */
+ if(pref_66)
+ vm86_outl(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
+ regs->eax);
+ else
+ vm86_outw(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
+ regs->eax & 0xFFFF);
+ INC_IP(2);
+ break;
+ case 0x6E: /* OUTSB */
+ case 0x6F: /* OUTSW */
+ if(opcode == 0x6E) {
+ vm86_outb(regs->edx & 0xFFFF,
+ Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
+ size = 1;
+ } else if(pref_66) {
+ vm86_outl(regs->edx & 0xFFFF,
+ Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
+ size = 4;
+ } else {
+ vm86_outw(regs->edx & 0xFFFF,
+ Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
+ size = 2;
+ }
+ if(regs->eflags & (1<<10))
+ regs->edi -= size;
+ else
+ regs->edi += size;
+ if(pref_rep) {
+ if(pref_66) {
+ regs->ecx--;
+ if(regs->ecx != 0) {
+ goto again;
+ } else {
+ SET_16(regs->ecx, regs->ecx - 1);
+ if(regs->ecx & 0xFFFF != 0)
+ goto again;
+ }
+ }
+ }
+ INC_IP(1);
+ break;
+
+ case 0x0F:
+ ErrorF("Hit 0F trap in VM86 code\n");
+ return -1;
+ case 0xF0:
+ ErrorF("Hit lock prefix in VM86 code\n");
+ return -1;
+ case 0xF4:
+ ErrorF("Hit HLT in VM86 code\n");
+ return -1;
+
+ default:
+ ErrorF("Unhandled GP fault in VM86 code (opcode = 0x%02X)\n",
+ opcode);
+ return -1;
+ }
+ return 0;
+}
+#undef SEG_CS
+#undef SEG_DS
+#undef SEG_ES
+#undef SEG_SS
+#undef SEG_GS
+#undef SEG_FS
+#undef REP
+#undef REPNZ
+#undef SET_8
+#undef SET_16
+#undef INC_IP
+#undef AGAIN
+
+static int
+vm86_loop(Vm86InfoPtr vi)
+{
+ int code;
+
+ while(1) {
+ code = vm86old(&vi->vms);
+ switch(VM86_TYPE(code)) {
+ case VM86_SIGNAL:
+ continue;
+ case VM86_UNKNOWN:
+ code = vm86_emulate(vi);
+ if(code < 0) {
+ Vm86Debug(vi);
+ return -1;
+ }
+ break;
+ case VM86_INTx:
+ if(VM86_ARG(code) == 0xFF)
+ return 0;
+ else {
+ PUSHW(vi, vi->vms.regs.eflags)
+ PUSHW(vi, vi->vms.regs.cs);
+ PUSHW(vi, vi->vms.regs.eip);
+ vi->vms.regs.cs = MMW(vi,VM86_ARG(code) * 4 + 2);
+ vi->vms.regs.eip = MMW(vi,VM86_ARG(code) * 4);
+ }
+ break;
+ case VM86_STI:
+ ErrorF("VM86 code enabled interrupts\n");
+ Vm86Debug(vi);
+ return -1;
+ default:
+ ErrorF("Unexpected result code 0x%X from vm86\n", code);
+ Vm86Debug(vi);
+ return -1;
+ }
+ }
+}
+
+int
+Vm86IsMemory(Vm86InfoPtr vi, U32 i)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ return 1;
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ return 1;
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ return 1;
+ else
+ return 0;
+}
+
+U8
+Vm86Memory(Vm86InfoPtr vi, U32 i)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ return MM(vi, i);
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ return LM(vi, i);
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ return HM(vi, i);
+ else {
+ ErrorF("Reading unmapped memory at 0x%08X\n", i);
+ }
+}
+
+U16
+Vm86MemoryW(Vm86InfoPtr vi, U32 i)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ return MMW(vi, i);
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ return LMW(vi, i);
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ return HMW(vi, i);
+ else {
+ ErrorF("Reading unmapped memory at 0x%08X\n", i);
+ return 0;
+ }
+}
+
+U32
+Vm86MemoryL(Vm86InfoPtr vi, U32 i)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ return MML(vi, i);
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ return LML(vi, i);
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ return HML(vi, i);
+ else {
+ ErrorF("Reading unmapped memory at 0x%08X\n", i);
+ return 0;
+ }
+}
+
+void
+Vm86WriteMemory(Vm86InfoPtr vi, U32 i, U8 val)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ MM(vi, i) = val;
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ LM(vi, i) = val;
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ HM(vi, i) = val;
+ else {
+ ErrorF("Writing unmapped memory at 0x%08X\n", i);
+ }
+}
+
+void
+Vm86WriteMemoryW(Vm86InfoPtr vi, U32 i, U16 val)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ MMW(vi, i) = val;
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ LMW(vi, i) = val;
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ HMW(vi, i) = val;
+ else {
+ ErrorF("Writing unmapped memory at 0x%08X\n", i);
+ }
+}
+
+void
+Vm86WriteMemoryL(Vm86InfoPtr vi, U32 i, U32 val)
+{
+ if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
+ MML(vi, i) = val;
+ else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
+ LML(vi, i) = val;
+ else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
+ HML(vi, i) = val;
+ else {
+ ErrorF("Writing unmapped memory at 0x%08X\n", i);
+ }
+}
+
+int
+Vm86AllocateMemory(Vm86InfoPtr vi, int n)
+{
+ int ret;
+ if(n<0) {
+ ErrorF("Asked to allocate negative amount of memory\n");
+ return vi->brk;
+ }
+
+ n = (n + 15) & ~15;
+ if(vi->brk + n > LOMEM_BASE + LOMEM_SIZE) {
+ ErrorF("Out of low memory\n");
+ exit(2);
+ }
+ ret = vi->brk;
+ vi->brk += n;
+ return ret;
+}
+
+int
+Vm86MarkMemory (Vm86InfoPtr vi)
+{
+ return vi->brk;
+}
+
+void
+Vm86ReleaseMemory (Vm86InfoPtr vi, int mark)
+{
+ vi->brk = mark;
+}
+
+static int
+vm86old(struct vm86_struct *vm)
+{
+ int res;
+
+ asm volatile (
+ "pushl %%ebx\n\t"
+ "movl %2, %%ebx\n\t"
+ "movl %1,%%eax\n\t"
+ "int $0x80\n\t"
+ "popl %%ebx"
+ : "=a" (res) : "n" (113), "r" (vm));
+ if(res < 0) {
+ errno = -res;
+ res = -1;
+ } else
+ errno = 0;
+ return res;
+}
+
+void
+Vm86Debug(Vm86InfoPtr vi)
+{
+ struct vm86_regs *regs = &vi->vms.regs;
+ int i;
+
+ ErrorF("eax=0x%08lX ebx=0x%08lX ecx=0x%08lX edx=0x%08lX\n",
+ regs->eax, regs->ebx, regs->ecx, regs->edx);
+ ErrorF("esi=0x%08lX edi=0x%08lX ebp=0x%08lX\n",
+ regs->esi, regs->edi, regs->ebp);
+ ErrorF("eip=0x%08lX esp=0x%08lX eflags=0x%08lX\n",
+ regs->eip, regs->esp, regs->eflags);
+ ErrorF("cs=0x%04lX ds=0x%04lX es=0x%04lX fs=0x%04lX gs=0x%04lX\n",
+ regs->cs, regs->ds, regs->es, regs->fs, regs->gs);
+ for(i=-7; i<8; i++) {
+ ErrorF(" %s%02X",
+ i==0?"->":"",
+ Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip + i)));
+ }
+ ErrorF("\n");
+}
+
+#ifdef NOT_IN_X_SERVER
+static void
+ErrorF(char *f, ...)
+{
+ va_list args;
+ va_start(args, f);
+ vfprintf(stderr, f, args);
+ va_end(args);
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-28 06:27:32 +0000