From: H. Peter Anvin <hpa@zytor.com>
Date: Mon, 11 Feb 2008 02:13:06 +0000 (-0800)
Subject: undiisr.S: save/restore upper half of %eflags
X-Git-Tag: v0.9.3~10^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9aec835541ffc2f5f959fd1fa9367c4e2754db2c;p=thirdparty%2Fipxe.git

undiisr.S: save/restore upper half of %eflags

Since we don't know what the UNDI code does, it is safest to
save/restore %eflags even though the lower half of %eflags is
automatically saved by the interrupt itself.
---

diff --git a/src/arch/i386/drivers/net/undiisr.S b/src/arch/i386/drivers/net/undiisr.S
index 15e1a63a3..f1c9eb154 100644
--- a/src/arch/i386/drivers/net/undiisr.S
+++ b/src/arch/i386/drivers/net/undiisr.S
@@ -23,6 +23,7 @@ undiisr:
 	pushw	%es
 	pushw	%fs
 	pushw	%gs
+	pushfl
 	pushal
 
 	/* Set up our segment registers */
@@ -64,6 +65,7 @@ chain:	/* Chain to next handler */
 	
 exit:	/* Restore registers and return */
 	popal
+	popfl
 	popw	%gs
 	popw	%fs
 	popw	%es