Re: misc/59151: efiboot hangs on new motherboard

["RVP via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR misc/59151; it has been noted by GNATS.

From: RVP <rvp%SDF.ORG@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: misc/59151: efiboot hangs on new motherboard
Date: Fri, 7 Mar 2025 10:21:45 +0000 (UTC)

 On Fri, 7 Mar 2025, stix%stix.id.au@localhost wrote:
 
 >> Fix:
 > I suspect that this firmware implements memory protection on the efiboot
 > image. I also assume that the variables written to as defined in the asm
 > are read-only, generating an exception, resulting in a silent hang.
 >
 
 Yeah, I think this makes sense. Can you see if the patch below also fixes
 this issue?
 
 ```
 diff -urN a/src/sys/arch/i386/stand/efiboot/bootx64/startprog64.S b/src/sys/arch/i386/stand/efiboot/bootx64/startprog64.S
 --- a/sys/arch/i386/stand/efiboot/bootx64/startprog64.S	2023-06-24 05:31:04.000000000 +0000
 +++ b/sys/arch/i386/stand/efiboot/bootx64/startprog64.S	2025-03-07 10:11:13.394064579 +0000
 @@ -65,6 +65,7 @@
   #define	CODE_SEGMENT	0x08
   #define	DATA_SEGMENT	0x10
 
 +	.data
   	.align	16
   	.globl _C_LABEL(startprog64)
   _C_LABEL(startprog64):
 ```
 
 Thx,
 -RVP