evaluator,
On an AMD this is what I get (XP SP1):
Code:
7FFE0300 8BD4 MOV EDX,ESP
7FFE0302 0F34 SYSENTER
7FFE0304 C3 RETN ; ring0 returns to this line
This is the rest of the code, but it isn't called:
Code:
7FFE0305 9C PUSHFD
7FFE0306 810C24 00010000 OR DWORD PTR SS:[ESP],100
7FFE030D 9D POPFD
7FFE030E C3 RETN
7FFE030F 8BD4 MOV EDX,ESP
7FFE0311 0F05 SYSCALL
7FFE0313 C3 RETN
7FFE0314 9C PUSHFD
7FFE0315 810C24 00010000 OR DWORD PTR SS:[ESP],100
7FFE031C 9D POPFD
7FFE031D C3 RETN
7FFE031E C2 0800 RETN 8
And here's a sample call
Code:
77D6E285 B8 41110000 MOV EAX,1141
77D6E28A BA 0003FE7F MOV EDX,7FFE0300
77D6E28F FFD2 CALL EDX
77D6E291 C2 1000 RETN 10
Seems that the same instruction is used as in Intel, not the 0F05 variant...
Here's the cpu info before you say it's a pentium
Code:
[ WCPUID Version 3.0g (c) 1996-2002 By H.Oda! ]
Processor #1 : AMD Athlon (Model 4) / ...
Platform : Socket A (Socket 462)
Vendor String : AuthenticAMD
CPU Type : Original OEM Processor (0)
Family : 6 (7)
Model : 4 (4)
Stepping ID : 4 (4)
Brand : ----
APIC : ----
Name String : AMD Athlon(tm) Processor
Internal Clock : 1399.32 MHz
System Bus : 266.54 MHz DDR
System Clock : 133.27 MHz
Multiplier : 10.5
L1 I-Cache : 64K Byte
L1 D-Cache : 64K Byte
L1 T-Cache : ----
L1 Cache : ----
L2 Cache : 256K Byte
L2 Speed : 1399.32 MHz (Full)
MMX Unit : Supported
SSE Unit : Not Supported
SSE2 Unit : Not Supported
MMX2 Unit : Supported
3DNow! Unit : Supported
3DNow!+ Unit : Supported