Date: Wed, 31 Oct 2012 21:27:15 +0000 (UTC) From: "Cherry G. Mathew" <cherry@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r242415 - projects/amd64_xen_pv/sys/amd64/xen Message-ID: <201210312127.q9VLRFqe034754@svn.freebsd.org>
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Author: cherry Date: Wed Oct 31 21:27:15 2012 New Revision: 242415 URL: http://svn.freebsd.org/changeset/base/242415 Log: Align the kernel stack to 16 bytes, and notify Xen of our kernel %rsp Approved by: gibbs (implicit) Modified: projects/amd64_xen_pv/sys/amd64/xen/machdep.c Modified: projects/amd64_xen_pv/sys/amd64/xen/machdep.c ============================================================================== --- projects/amd64_xen_pv/sys/amd64/xen/machdep.c Wed Oct 31 21:24:31 2012 (r242414) +++ projects/amd64_xen_pv/sys/amd64/xen/machdep.c Wed Oct 31 21:27:15 2012 (r242415) @@ -534,13 +534,16 @@ initxen(struct start_info *si) PCPU_SET(rsp0, (vm_offset_t) thread0.td_pcb & ~0xFul /* 16 byte aligned */); PCPU_SET(curpcb, thread0.td_pcb); + HYPERVISOR_stack_switch(GSEL(GDATA_SEL, SEL_KPL), + (unsigned long) PCPU_GET(rsp0)); /* Tell xen about the kernel stack */ + /* setup user mode selector glue */ _ucodesel = GSEL(GUCODE_SEL, SEL_UPL); _udatasel = GSEL(GUDATA_SEL, SEL_UPL); _ufssel = GSEL(GUFS32_SEL, SEL_UPL); _ugssel = GSEL(GUGS32_SEL, SEL_UPL); - return (u_int64_t) thread0.td_pcb; + return (u_int64_t) thread0.td_pcb & ~0xFul /* 16 byte aligned */; } /*
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