Date: Sat, 26 Jan 2013 08:55:04 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r245942 - head/sys/arm/arm Message-ID: <201301260855.r0Q8t4Ik031333@svn.freebsd.org>
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Author: andrew Date: Sat Jan 26 08:55:04 2013 New Revision: 245942 URL: http://svnweb.freebsd.org/changeset/base/245942 Log: Align td_frame as it will be placed into the sp register which must be 8 byte aligned on ARM EABI. Modified: head/sys/arm/arm/vm_machdep.c Modified: head/sys/arm/arm/vm_machdep.c ============================================================================== --- head/sys/arm/arm/vm_machdep.c Sat Jan 26 05:27:00 2013 (r245941) +++ head/sys/arm/arm/vm_machdep.c Sat Jan 26 08:55:04 2013 (r245942) @@ -398,6 +398,12 @@ cpu_thread_alloc(struct thread *td) PAGE_SIZE) - 1; td->td_frame = (struct trapframe *) ((u_int)td->td_kstack + USPACE_SVC_STACK_TOP - sizeof(struct pcb)) - 1; + /* + * Ensure td_frame is aligned to an 8 byte boundary as it will be + * placed into the stack pointer which must be 8 byte aligned in + * the ARM EABI. + */ + td->td_frame = (struct trapframe *)((u_int)td->td_frame & ~7); #ifdef __XSCALE__ #ifndef CPU_XSCALE_CORE3 pmap_use_minicache(td->td_kstack, td->td_kstack_pages * PAGE_SIZE);
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