Date: Tue, 30 Apr 2002 15:10:48 -0500 (CDT) From: Larry Rosenman <ler@lerctr.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: ports/37610: XFree86-4 x86emu needs update for new BIOS's Message-ID: <200204302010.g3UKAm9F000814@lerlaptop.iadfw.net>
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>Number: 37610
>Category: ports
>Synopsis: XFree86-4 x86emu needs update for new BIOS's
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-ports
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Apr 30 13:20:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Larry Rosenman
>Release: FreeBSD 4.5-STABLE i386
>Organization:
LERCTR Consulting
>Environment:
System: FreeBSD lerlaptop 4.5-STABLE FreeBSD 4.5-STABLE #24: Tue Apr 30 07:09:14 CDT 2002 ler@lerlaptop:/usr/obj/usr/src/sys/LERLAPTOP i386
>Description:
With some of the newer chip sets BIOS's using extended X86 opcodes
and addressing modes, the XFree86 4.2.0 x86emu needs enhancement.
Steve Woodford <scw@netbsd.org> made the following patch, which
fixes this issue.
can this be added to the XFree86-4-Server port as a patch to
xc/extras/x86emu/src/x86emu/decode.c ?
>How-To-Repeat:
run on a I830MG graphics system, see the X86 ILLEGAL OPCODE (see the
-STABLE and -MOBILE lists from yesterday (April 29, 2002) for example
logs.
This patch fixes THAT problem.
>Fix:
Apply this patch to xc/extras/x86emu/src/x86emu/decode.c
--- decode.c.old Sat Apr 27 12:04:29 2002
+++ decode.c Sat Apr 27 13:56:06 2002
@@ -734,6 +734,10 @@
{
unsigned offset;
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ u32* rp = decode_rm_long_register(rm);
+ return (*rp);
+ }
switch (rm) {
case 0:
DECODE_PRINTF("[BX+SI]");
@@ -782,6 +786,10 @@
int rm)
{
int displacement = (s8)fetch_byte_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ u32* rp = decode_rm_long_register(rm);
+ return (*rp + displacement);
+ }
switch (rm) {
case 0:
DECODE_PRINTF2("%d[BX+SI]", displacement);
@@ -830,6 +838,10 @@
int rm)
{
unsigned displacement = (u16)fetch_word_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ u32* rp = decode_rm_long_register(rm);
+ return (*rp + displacement);
+ }
switch (rm) {
case 0:
DECODE_PRINTF2("%04x[BX+SI]", displacement);
>Release-Note:
>Audit-Trail:
>Unformatted:
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