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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
I should intercept Power-button...
It can be made only if to know handler SMM address
How to learn handler SMM address Question
Post 05 Jun 2004, 19:35
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comrade



Joined: 16 Jun 2003
Posts: 1137
Location: Russian Federation
comrade
SMM?

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comrade (comrade64@live.com; http://comrade.ownz.com/)
Post 05 Jun 2004, 21:55
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f0dder



Joined: 19 Feb 2004
Posts: 3170
Location: Denmark
f0dder
systems management mode?
Post 05 Jun 2004, 22:28
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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
yes, System Managment Mode...
Post 06 Jun 2004, 08:43
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comrade



Joined: 16 Jun 2003
Posts: 1137
Location: Russian Federation
comrade
which OS are u talking about?

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Post 06 Jun 2004, 13:14
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f0dder



Joined: 19 Feb 2004
Posts: 3170
Location: Denmark
f0dder
Probably his own... dunno anything about these issues really Kreoton, but perhaps have a look at the linux ACPI code?
Post 06 Jun 2004, 14:25
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Kreoton



Joined: 05 Jun 2004
Posts: 14
Location: Russia, Moscow
Kreoton
I now write OS, it is necessary to me that she was capable to intercept pressing from Power-Button...
For this purpose it is necessary to know SMBASE...

Miraculix Operation System:
snapshot: Arrow http://filesx.narod.ru/Miraculix.rar
source code (kernel): Arrow http://filesx.narod.ru/kernel.asm
Post 06 Jun 2004, 16:58
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Kevin_Zheng



Joined: 04 Jul 2003
Posts: 125
Location: China
Kevin_Zheng
Hi Comrade:
Please see the Intel development refernece volume 3. In the BIOS post time, the first smbase address is 38000h, then the BIOS will adjust it A000H. Of course, if the machine have four cpus, then all of cpus smbase must be not equal.

The SMM handler present two types: one is below 31K and CS:EIP below 1M address. Aonther is below 1M byte and CS:EIP above 1M address and below 4G byte.

The SMM only used by BIOS, so the OS can't access SMM code. It should be transant for OS and application.
Post 07 Jun 2004, 03:55
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