---
name: "check_signature"
section: "9"
platform: "linux"
package: "linux-manual-2.6.18"
version: "2.6.18.dfsg.1-26etch2"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/check_signature"
---

# check\_signature(9)

find BIOS signatures

## NAME

check\_signature - find BIOS signatures

## SYNOPSIS

**int check\_signature(volatile void \_\_iomem \*** *io\_addr***, const unsigned char \*** *signature***, int** *length***);**

## ARGUMENTS

*io\_addr*

mmio address to check

*signature*

signature block

*length*

length of signature

## DESCRIPTION

Perform a signature comparison with the mmio address io\_addr. This address should have been obtained by ioremap. Returns 1 on a match.

## AUTHORS

**Matthew Wilcox** \<matthew@wil.cx\>

-

  Author.

**Alan Cox** \<alan@redhat.com\>

-

  Author.

## COPYRIGHT