Date: Sun, 10 Jun 2018 14:21:01 +0000 (UTC) From: Bruce Evans <bde@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r334924 - head/sys/i386/i386 Message-ID: <201806101421.w5AEL1Qf049280@repo.freebsd.org>
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Author: bde Date: Sun Jun 10 14:21:01 2018 New Revision: 334924 URL: https://svnweb.freebsd.org/changeset/base/334924 Log: Fix panics in potentially all x86bios calls on i386 since r332489. A call to npxsave() in the exception trampolines was not relocated. This call to a garbage address usually paniced when made, but it is only made when the thread has used an FPU recently, and this is not the usual case. PR: 228755 Reviewed by: kib Modified: head/sys/i386/i386/vm86bios.s Modified: head/sys/i386/i386/vm86bios.s ============================================================================== --- head/sys/i386/i386/vm86bios.s Sun Jun 10 10:23:31 2018 (r334923) +++ head/sys/i386/i386/vm86bios.s Sun Jun 10 14:21:01 2018 (r334924) @@ -67,7 +67,8 @@ ENTRY(vm86_bioscall) pushl %edx movl TD_PCB(%ecx),%ecx pushl PCB_SAVEFPU(%ecx) - call npxsave + movl $npxsave,%eax + call *%eax addl $4,%esp popl %edx /* recover our pcb */ 1:
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