1 files changed, 67 insertions, 0 deletions
diff --git a/payloads/coreinfo/cpuid.S b/payloads/coreinfo/cpuid.S
new file mode 100644
index 0000000000..9b1d13448f
--- /dev/null
+++ b/payloads/coreinfo/cpuid.S
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the coreinfo project.
+ *
+ * It is derived from the x86info project, which is GPLv2-licensed.
+ *
+ * Copyright (C) 2001-2007 Dave Jones <davej@codemonkey.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+/* calling syntax:  docpuid(idx,eax,ebx,ecx,edx) */
+	
+.align 4
+.text
+
+.global docpuid
+	.type docpuid,@function
+
+docpuid:
+	pushl %ebp
+	movl %esp, %ebp
+	pushl %edi
+	pushl %ebx
+	pushl %ecx
+	pushl %edx
+	movl 8(%ebp),%eax
+	cpuid
+	movl 12(%ebp),%edi
+	test %edi,%edi
+	jz L1
+	movl %eax, (%edi)
+
+L1:	movl 16(%ebp),%edi
+	test %edi,%edi
+	jz L2
+	movl %ebx,(%edi)
+
+L2:	movl 20(%ebp),%edi
+	test %edi,%edi
+	jz L3
+	movl %ecx,(%edi)
+
+L3:	movl 24(%ebp), %edi
+	test %edi,%edi
+	jz L4
+	movl %edx,(%edi)
+
+L4:	popl %edx
+	popl %ecx
+	popl %ebx
+	popl %edi
+	movl %ebp,%esp
+	popl %ebp
+	ret
+
+.section .note.GNU-stack,"", @progbits